Optical lenses and electronic devices

Abstract

Provided in the present application are an optical lens and an electronic device. The optical lens comprises, in sequence from a first side to a second side: a first lens with a positive focal power, wherein a first side face of the first lens is a convex face; a second lens with a negative focal power, wherein a first side face of the second lens is a concave face, and a second side face thereof is a concave face; a third lens with a positive focal power, wherein a second side face of the third lens is a convex face; a fourth lens with a focal power, wherein a first side face of the fourth lens is a convex face; a fifth lens with a focal power; and a sixth lens with a negative focal power. The present application solves the problem in the prior art of it being difficult to take into account all of a high resolution, miniaturization, back focal length, a small CRA, low sensitivity and a high luminous flux for an optical lens. Further provided in the present application are an optical lens and an electronic device. The optical lens comprises: a first lens, which has a positive focal power, wherein a first side face of the first lens is a convex face; a second lens, a first side face and a second side face of which have opposite face shapes; a third lens, which has a positive focal power, wherein a first side face of the third lens is a concave face, and a second side face of the third lens is a convex face; a fourth lens, which has a negative focal power, wherein a first side face of the fourth lens is a concave face, and a second side face of the fourth lens is a convex face; a fifth lens, which has a positive focal power, wherein a second side face of the fifth lens is a convex face; a sixth lens, which has a focal power, wherein a first side face of the sixth lens is a convex face; a seventh lens, which has a focal power; and an eighth lens, which has a negative focal power, wherein a second side face of the eighth lens is a concave face. The present application solves the problems in the prior art of an optical lens having a small luminous flux, it being impossible to take into account both a high resolution and a small aperture, and the lens design being limited by miniaturization, resulting in a poor trade-off between high sensitivity, aberration, etc. Further disclosed in the present application are an optical lens and an electronic device comprising the optical lens. The optical lens comprises, in sequence from a first side to a second side along an optical axis: a first lens with a positive focal power; a second lens with a negative focal power, wherein a first side face of the second lens is a concave face, and a second side face of the second lens is a concave face; a third lens with a focal power; a fourth lens with a focal power; a fifth lens with a focal power; a sixth lens with a focal power; a seventh lens with a focal power, wherein the seventh lens and the sixth lens have opposite positive and negative focal-power properties; and an eighth lens with a negative focal power.

Description

Optical lenses and electronic devices

[0001] This application claims priority to the patent application filed with the State Intellectual Property Office of China on July 13, 2023, with application number 202310861678.8 and application name “Optical lens and electronic device”. This application also claims priority to the patent application filed with the State Intellectual Property Office of China on August 17, 2023, with application number 202311044426.2 and application name “Optical lens and electronic device”. This application also claims priority to the patent application filed with the State Intellectual Property Office of China on December 19, 2023, with application number 202311757471.2 and application name “Optical lens and electronic device”. Technical Field

[0002] The present application relates to the technical field of optical imaging equipment, and in particular to an optical lens and electronic equipment. Background Art

[0003] With the advancement of technology, the demand for optical lenses in daily life is increasing, and optical lenses are being applied in a wider range of scenarios. For example, in the automotive industry, driving safety requires more accurate detection of the driving environment, and optical lenses have become key components for detecting information around the vehicle. With the continuous development of automotive driving systems, especially the recent innovations in autonomous driving technology brought about by the development of big data and artificial intelligence, the market requirements for automotive front-view optical lenses have become increasingly stringent. These include the contradiction between low cost and low sensitivity and high resolution, the contradiction between small aperture and miniaturization and high light throughput and high pixel count, and the requirements for field of view in different usage conditions. Furthermore, given the high safety requirements of automotive driving, the thermal and vibration stability performance of optical lenses has become increasingly important.

[0004] However, current optical lenses still have some problems. For example, if automotive lenses require better resolution performance, aspheric lenses need to be used to improve resolution, but this will increase costs, making it difficult to achieve low costs. At the same time, automotive front-view optical lenses require good imaging performance at medium and long distances. The existing lens architecture that only uses six spherical lenses has the problem of not being able to take into account high resolution, high light throughput and low sensitivity. In addition, existing automotive lenses find it difficult to achieve back focal length, miniaturization and small CRA at the same time, and cannot be well matched to the assembly of automotive chips. Existing optical lenses generally require a higher light throughput, which requires a larger light clearance diameter, which is difficult to reconcile with the miniaturization requirement.

[0005] In other words, the optical lenses in the prior art have the problem of being difficult to achieve high resolution, miniaturization, back focal length, small CRA, low sensitivity and high light throughput at the same time.

[0006] Application Contents

[0007] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem in the prior art that optical lenses are difficult to achieve simultaneously high resolution, miniaturization, back focal length, small CRA, low sensitivity and high light throughput.

[0008] To achieve the above objectives, according to one aspect of the present application, an optical lens is provided, comprising, from a first side to a second side, a first lens having positive optical power; a second lens having negative optical power; a third lens having positive optical power; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens having negative optical power.

[0009] In one embodiment, the first side surface of the first lens is convex, and the second side surface is concave.

[0010] In one embodiment, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

[0011] In one embodiment, the first side surface of the second lens is concave, and the second side surface is concave.

[0012] In one embodiment, the first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

[0013] In one embodiment, the first side surface of the third lens is concave, and the second side surface is convex.

[0014] In one embodiment, the fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex.

[0015] In one embodiment, the fourth lens has negative optical power, and the first side surface of the fourth lens is convex, and the second side surface is concave.

[0016] In one embodiment, the fifth lens element has negative optical power, and the first side surface of the fifth lens element is concave, and the second side surface of the fifth lens element is convex.

[0017] In one embodiment, the fifth lens element has negative optical power, and a first side surface and a second side surface of the fifth lens element are concave.

[0018] In one embodiment, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface is concave.

[0019] In one embodiment, the first side surface of the sixth lens is concave, and the second side surface is convex.

[0020] In one embodiment, the first side surface of the sixth lens is concave, and the second side surface is concave.

[0021] In one embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave.

[0022] In one embodiment, the fourth lens and the fifth lens are cemented together to form a doublet lens.

[0023] In one embodiment, the optical lens further includes a stop, and the stop is disposed between the second lens and the third lens.

[0024] In one embodiment, the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, and the entire focal length value F of the optical lens satisfy: TTL / F≤4.

[0025] In one embodiment, the focal length F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens satisfy: (F*θ) / D≥0.2.

[0026] In one embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.08.

[0027] In one embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field angle of the optical lens, and the entire focal length F of the optical lens satisfy the following relationship: D / H / F≤0.2.

[0028] In one embodiment, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy the following relationship: F / θ≤30.

[0029] In one embodiment, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.06.

[0030] In one embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the relationship: F / ENPD≤3.

[0031] In one embodiment, the image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens, and the arc value θ of the maximum field angle of the optical lens satisfy: 0.4≤(H / 2) / (F*tan(θ / 2))≤2.

[0032] In one embodiment, a curvature radius R4 of the second side surface of the second lens and a curvature radius R5 of the first side surface of the third lens satisfy: |R4 / R5|≤20.

[0033] In one embodiment, the focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: F6 / F≥-7.

[0034] In one embodiment, the focal length F2 of the second lens and the focal length F3 of the third lens satisfy the relationship: -5≤F2 / F3≤-0.02.

[0035] In one embodiment, the focal length F of the optical lens, the curvature radius R3 of the first side surface of the second lens, and the curvature radius R4 of the second side surface of the second lens satisfy: |F / R3|+|F / R4|≤8.

[0036] In one embodiment, the air distance d7 between the third lens and the fourth lens and the optical back focus of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following relationship: (d7*BFL) / (d7+BFL)≤1.

[0037] In one embodiment, the curvature radius R6 of the second side surface of the third lens and the entire focal length F of the optical lens group satisfy: |R6 / F|≤10.

[0038] In one embodiment, a curvature radius R7 of the first side surface of the fourth lens and a focal length F of the entire optical lens group satisfy the following relationship: R7 / F≤7.

[0039] In one embodiment, the curvature radius R10 of the second side surface of the fifth lens and the focal length F of the entire optical lens group satisfy: |R10 / F|≥1.2.

[0040] In one embodiment, the curvature radius R11 of the first side surface of the sixth lens and the entire focal length F of the optical lens group satisfy: |R11 / F|≤5.

[0041] In one embodiment, the curvature radius R10 of the second side surface of the fifth lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy: |R10 / TTL|≥0.8.

[0042] In one embodiment, the center thickness d6 of the third lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy: d6 / TTL≥0.02.

[0043] In one embodiment, the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens, and the center thickness d11 of the sixth lens satisfy: TTL / d11≥6.

[0044] In one embodiment, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens, satisfy the following relationship: (d8+d9) / TTL≥0.05.

[0045] In one embodiment, the distance d26 between the first lens and the third lens, the center thickness d6 of the third lens, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following relationship: |(d26-d6) / TTL|≤0.15.

[0046] In one embodiment, the center thickness d3 of the second lens and the center thickness d6 of the third lens satisfy the relationship: 0.2≤d3 / d6.

[0047] In one embodiment, the distance d26 between the first lens and the third lens, the center thickness d6 of the third lens, and the curvature radius R5 of the first side surface of the third lens satisfy: |(d26-d6) / R5|≤0.4.

[0048] In one embodiment, the maximum clear aperture D of the first side surface of the first lens and the curvature radius R1 of the first side surface of the first lens satisfy: D / R1≥0.05.

[0049] In one embodiment, the maximum effective light-clearance D7 of the first side surface of the fourth lens corresponding to the maximum field of view angle of the optical lens, the curvature radius R7 of the first side surface of the fourth lens, and the sag SAG7 of the first side surface of the fourth lens satisfy the following: arctan(D7 / (R7-SAG7))≥0.2.

[0050] In one embodiment, the curvature radius R10 of the second side surface of the fifth lens, the center thickness d8 of the fourth lens, and the center thickness d9 of the fifth lens satisfy: |R10 / (d8+d9)|≥2.5.

[0051] In one embodiment, a curvature radius R10 of the second side surface of the fifth lens and a center thickness d9 of the fifth lens satisfy: |R10 / d9|≥5.2.

[0052] In one embodiment, a curvature radius R12 of the second side surface of the sixth lens and a central thickness d11 of the sixth lens satisfy: |R12 / d11|≤55.

[0053] In one embodiment, a curvature radius R11 of the first side surface of the sixth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: |R11 / R12|≥0.1.

[0054] In one embodiment, a curvature radius R10 of the second side surface of the fifth lens and a curvature radius R11 of the first side surface of the sixth lens satisfy: |R10 / R11|≥4.3.

[0055] According to another aspect of the present application, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0056] Applying the technical solution of the present application, the optical lens includes, from the first side to the second side, a first lens element with positive optical power, a second lens element with negative optical power, a third lens element with positive optical power, a fourth lens element with optical power, and a fifth lens element with optical power; the first side surface of the first lens element is convex; the first side surface of the second lens element is concave, and the second side surface is concave; the second side surface of the third lens element is convex; the first side surface of the fourth lens element is convex; and the sixth lens element has negative optical power.

[0057] The first lens has positive optical power. Its first side is convex, which reduces the incident angle of light and the corresponding image height for the same field of view, helping to receive light from a wider angle and increase luminous flux. The second side of the first lens can be either concave or convex. A concave second side smoothes the path of light, improving resolution and reducing system sensitivity. A convex second side further compresses light, reducing the aperture of subsequent lenses and achieving miniaturization.

[0058] The second lens has negative optical power, and the first side surface of the second lens is concave, which effectively smooths the trend of the front light, diverges the light, reduces the system sensitivity, and is beneficial to the subsequent increase of the image surface and the correction of aberrations; the second side surface is concave, which further diverges the light. Under the same field of view angle conditions, the subsequent optical system can have a larger light receiving surface, expand the image surface, and at the same time realize the increase of the physical aperture of the diaphragm, the aperture becomes larger, and a larger amount of light is achieved, thereby increasing the brightness of the image surface.

[0059] The third lens has positive focal power, and the first side surface of the third lens can be either convex or concave. When the first side surface of the third lens is convex, it can effectively converge light, smooth the light trend, reduce system sensitivity, and reduce the rear port diameter, which is conducive to miniaturization; when the first side surface of the third lens is concave, it can provide a larger light receiving surface for the subsequent optical system, which is conducive to balancing aberrations and improving resolution; the second side surface of the third lens is convex, and its shape is significantly different from the first side surface of the fourth lens, which further changes the light trend, compresses the subsequent diameter, and helps to achieve miniaturization.

[0060] The fourth lens element has positive or negative focal power, and its first side is convex, effectively changing the light path, converging it, and compressing the rear port diameter. The second side of the fourth lens element can be convex or concave. When the second side of the fourth lens element is convex, it facilitates double bonding with the fifth lens element. With a proper distribution of the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance image resolution. When the second side of the fourth lens element is concave, it facilitates double bonding with the fifth lens element. With a proper distribution of the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance image resolution.

[0061] The optical power of the fifth lens can be positive or negative. When the optical power of the fifth lens is negative, it is beneficial for diverging light. When the optical power of the fifth lens is positive, it helps to reduce the diameter of the rear port and achieve miniaturization.

[0062] The sixth lens has negative optical power, which facilitates the smooth transition of light to the imaging surface and ensures imaging stability.

[0063] This solution uses six lenses. By optimizing the optical power and surface shape of each lens, the optical lens of this application has at least one beneficial effect of high resolution, miniaturization, back focal length, small CRA, low sensitivity and high light throughput.

[0064] The main purpose of the present application is to provide an optical lens and electronic device to solve at least one of the problems of optical lenses in the prior art, namely, low light transmittance, inability to achieve both high resolution and small aperture, miniaturization limitations on lens design, resulting in high sensitivity and poor balance between aberrations.

[0065] To achieve the above-mentioned objectives, according to one aspect of the present application, an optical lens is provided, comprising: a first lens, the first lens having positive optical power; a second lens, the second lens having optical power; a third lens, the third lens having positive optical power; a fourth lens, the fourth lens having negative optical power; a fifth lens, the fifth lens having positive optical power; a sixth lens, the sixth lens having optical power; a seventh lens, the seventh lens having optical power; and an eighth lens, the eighth lens having negative optical power.

[0066] In one embodiment, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

[0067] In one embodiment, the first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

[0068] In one embodiment, the second lens has negative optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave.

[0069] In one embodiment, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex.

[0070] In one embodiment, the second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave.

[0071] In one embodiment, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface.

[0072] In one embodiment, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0073] In one embodiment, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

[0074] In one embodiment, the first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a convex surface.

[0075] In one embodiment, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0076] In one embodiment, the sixth lens has positive optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

[0077] In one embodiment, the sixth lens has positive optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0078] In one embodiment, the seventh lens has positive optical power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex.

[0079] In one embodiment, the seventh lens has negative optical power, the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex.

[0080] In one embodiment, the seventh lens has negative optical power, a first side surface of the seventh lens is concave, and a second side surface of the seventh lens is concave.

[0081] In one embodiment, the seventh lens has negative optical power, the first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave.

[0082] In one embodiment, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave.

[0083] In one embodiment, the first side surface of the eighth lens is a convex surface, and the second side surface of the eighth lens is a concave surface.

[0084] In one embodiment, the optical lens further includes a stop, and the stop is located between the second lens and the third lens.

[0085] In one embodiment, the third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses.

[0086] In one embodiment, the sum d67 of the center thickness of the sixth lens and the center thickness of the seventh lens and the total length TTL of the optical lens satisfy the following relationship: d67 / TTL≤0.3.

[0087] In one embodiment, the focal length value F of the optical lens, the arc value θ of the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: (F*θ) / D≥0.3.

[0088] In one embodiment, the entire focal length F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H≥45.

[0089] In one embodiment, the total length TTL of the optical lens and the entire focal length F of the optical lens group satisfy: TTL / F≤3.

[0090] In one embodiment, the entire focal length F of the optical lens, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV≤0.5.

[0091] In one embodiment, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: 0.5≤F / H≤3.

[0092] In one embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective light-clearance diameter D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective light-clearance diameter D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following relationship: -1≤(R1 / D) / (R2 / D2)≤1.

[0093] In one embodiment, a curvature radius R9 of the first side surface of the fifth lens and a curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7.

[0094] In one embodiment, the focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF*θ) / (F*θ)|≤0.05.

[0095] In one embodiment, the entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the relationship: F / ENPD≤2.

[0096] In one embodiment, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the entire focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / F≤0.2.

[0097] In one embodiment, the curvature radius R10 of the second side surface of the fifth lens and the maximum effective clear aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy the following relationship: R10 / D9≥-7.

[0098] In one embodiment, the curvature radius R10 of the second side surface of the fifth lens and the focal length F of the entire optical lens group satisfy the following relationship: R10 / F≥-3.5.

[0099] In one embodiment, a curvature radius R15 of the second side surface of the eighth lens and a total optical length TTL of the optical lens satisfy the following relationship: R15 / TTL>0.001.

[0100] In one embodiment, the optical back focus BFL of the optical lens and the entire focal length value F of the optical lens satisfy the following relationship: BFL / F≤0.54.

[0101] In one embodiment, the curvature radius R15 of the second side surface of the eighth lens element and the optical back focus of the optical lens satisfy the following relationship: R15 / BFL≥0.5.

[0102] In one embodiment, the curvature radius R15 of the second side surface of the eighth lens and the focal length F of the entire optical lens group satisfy: R15 / F≥0.3.

[0103] According to another aspect of the present application, an electronic device is provided, comprising the above-mentioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0104] Applying the technical solution of the present application, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, wherein the first lens has positive focal power, and the first side surface of the first lens is convex; the second lens has optical power, and the surface shapes of the first side surface of the second lens and the second side surface of the second lens are opposite; the third lens has positive focal power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex; the fourth lens has negative focal power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fifth lens has positive focal power, and the second side surface of the fifth lens is convex; the sixth lens has optical power, and the first side surface of the sixth lens is convex; the seventh lens has optical power; the eighth lens has negative focal power, and the second side surface of the eighth lens is concave.

[0105] The first lens has positive focal power, converging light. The convex first side of the first lens facilitates light collection over a wide area, allowing a greater amount of light to enter the optical lens, thereby increasing the optical throughput and illumination. The concave second side of the first lens reduces its size to meet manufacturing requirements and lowers costs. Furthermore, the concave surface's control of light reduces sensitivity to light transitioning to the rear, improving image resolution. The use of a high-refractive-index material for the first lens facilitates convergence of front-end light, thereby reducing the front port diameter.

[0106] The first lens has positive focal power, and both its first and second side surfaces are convex. This helps to further converge the light rays passing through the first lens as they exit from the second side of the lens, limiting the height of the light rays and thus compressing the aperture of the optical lens, facilitating a small-aperture, miniaturized design. Furthermore, the first lens is made of spherical glass, which allows for the addition of a waterproof coating while reducing processing costs.

[0107] The second lens has negative optical power, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to negative optical power and the first side of the second lens to be convex facilitates a smooth transition of front-end light. The second side of the second lens is concave, so that the light focused on the first side is released and fills the entrance pupil as much as possible, improving the illumination of the target surface.

[0108] The second lens has negative optical power, with its first side surface being concave and its second side surface being convex. The negative optical power of the second lens is achieved by designing its first side surface as concave, which complements the convex second side surface of the first lens, thereby smoothing the path of light. The convex second side surface of the second lens also perfectly receives light, reducing the sensitivity of the optical lens.

[0109] The second lens has positive optical power, with a convex first side and a concave second side. The second lens has positive optical power and is a meniscus shaped convex toward the first side, which compresses light and reduces the rear port diameter, achieving miniaturization.

[0110] The third lens has positive optical power, with its first side surface being concave and its second side surface being convex. The third lens is designed with positive optical power and a concave first side surface to better receive light passing through the aperture, leaving ample room for adjusting light aberrations in the rear optical system. The convex second side surface ensures that the third and fourth lenses have similar light paths, reducing light energy loss caused by inter-lens reflections, improving relative illumination, and minimizing off-axis aberrations caused by field curvature correction.

[0111] The fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex. The fourth lens adopts negative optical power and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens. The second side surface of the fourth lens is designed to be convex to change the direction of the light. At the same time, the fourth lens acts as a negative film of the cemented part, and its material properties also play a crucial role in correcting aberrations such as chromatic aberration.

[0112] The fifth lens element has positive optical power, and its first and second side surfaces are convex. The fifth lens element's positive optical power and convex first side surface can gather light from the front optical system and limit the rear port diameter. As a key lens connecting the front and rear lens groups, the fifth lens element's reduced aperture can mitigate the effects of large aberrations caused by light from the edge of the field of view, improving the sensitivity and optical performance of the optical lens. The convex second side surface of the fifth lens element optimizes the rear port diameter. At the same time, the convex design maintains the sensitivity of light transmitted from the first side surface, contributing to reduced sensitivity.

[0113] The fifth lens element has positive optical power, with a concave first side and a convex second side. The fifth lens element has positive optical power, and its concave first side receives upward-rising light, ensuring no significant change in the light path through the lens, thus optimizing its sensitivity. The convex second side of the fifth lens alters the light path, resulting in a smoother transition to the rear.

[0114] The sixth lens has negative optical power, with a convex first surface and a concave second surface. This negative optical power, combined with the convex first surface to focus frontal light and the concave second surface to diverge light, increases luminous flux and enhances imaging quality in dark environments.

[0115] The sixth lens element has positive optical power, with a convex first side and a convex second side. The sixth lens element has positive optical power, and the convex first side of the sixth lens is designed to be symmetrical with the convex second side of the fourth lens element, thereby balancing aberrations. The convex second side of the sixth lens further converges light towards the center of the image, reducing the diameter of the rear port.

[0116] The sixth lens has positive optical power, with a convex first side and a concave second side. The sixth lens is configured with positive optical power to converge light. The convex first side of the sixth lens receives the leading light, while the concave second side acts as a transition, smoothing the path of light entering the seventh lens and improving the resolution of the optical lens.

[0117] The seventh lens element has positive optical power, with its first and second side surfaces being convex. Designing the seventh lens element with positive optical power and adopting a biconvex structure further focuses frontal light, allowing it to smoothly enter the rear optical system and achieve a small aperture.

[0118] The seventh lens element has negative optical power, with its first side surface being concave and its second side surface being convex. By designing the seventh lens element with negative optical power and a meniscus-shaped structure convex toward its second side, the seventh lens element can receive light emitted by the sixth lens and help diffuse it outward, thereby expanding the imaging range.

[0119] The seventh lens element has negative optical power, with its first and second sides being concave. By designing the seventh lens element with negative optical power and a biconcave structure, combined with the biconvex sixth lens element, not only does this eliminate the loss of transitional light, but the combination of positive and negative optical power also helps correct aberrations between peripheral and central rays, achieving high resolution.

[0120] The seventh lens element has negative optical power, with its first side being convex and its second side being concave. This configuration, along with its first convex side to converge light and its second concave side to diverge it, facilitates rapid accumulation of light on the image plane, expanding the imaging range.

[0121] The eighth lens element has negative optical power, with both its first and second side surfaces being concave. Designing the eighth lens element with negative optical power and a concave first side surface facilitates the collection of light entering through the seventh lens element, while the concave second side surface regulates peripheral light aberrations, thereby improving the resolving power of the optical lens.

[0122] The eighth lens element has negative optical power, with a convex first surface and a concave second surface. Designing the eighth lens element with negative optical power further diverges light, while the convex first surface facilitates receiving incident light from the seventh lens element. The concave second surface improves light throughput and enhances imaging quality in dark environments.

[0123] The present application provides an optical lens, which may include, in order from a first side to a second side along an optical axis: a first lens having positive optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having optical power; and an eighth lens having negative optical power.

[0124] In one embodiment, the first side surface of the first lens is a convex surface, and the second side surface is a concave surface or a convex surface.

[0125] In one embodiment, the second lens has negative optical power, and its first side surface is concave, and its second side surface is concave.

[0126] In one embodiment, the third lens has positive optical power, and its first side surface is convex and its second side surface is convex; or the third lens has negative optical power, and its first side surface is convex and its second side surface is concave.

[0127] In one embodiment, the fourth lens has positive optical power, and its first side surface is convex and its second side surface is convex; or the fourth lens has negative optical power, its first side surface is concave and its second side surface is concave; or the fourth lens has negative optical power, its first side surface is convex and its second side surface is concave.

[0128] In one embodiment, the fifth lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or the fifth lens has negative optical power, and its first side surface is concave, and its second side surface is convex.

[0129] In one embodiment, the sixth lens has negative optical power, its first side surface is convex, and its second side surface is concave; or the sixth lens has positive optical power, its first side surface is convex, and its second side surface is convex.

[0130] In one embodiment, the seventh lens has positive optical power, and its first side surface is convex, and its second side surface is convex; or the seventh lens has negative optical power, its first side surface is concave, and its second side surface is concave; or the seventh lens has negative optical power, its first side surface is concave, and its second side surface is convex.

[0131] In one embodiment, the first side surface of the eighth lens is concave, and the second side surface is concave or convex.

[0132] In one embodiment, the optical lens further includes a stop disposed between the second lens and the third lens.

[0133] In one embodiment, the third lens and the fourth lens are cemented together to form a doublet lens.

[0134] In one embodiment, the fourth lens and the fifth lens are cemented together to form a doublet lens.

[0135] In one embodiment, the sixth lens and the seventh lens are cemented together to form a doublet lens.

[0136] In one embodiment, a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy the following conditions: TTL / F≤3.5.

[0137] In one embodiment, the total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

[0138] In one embodiment, the curvature radius R31 of the first side surface of the third lens and the total effective focal length F of the optical lens satisfy: <R31 / F≤20。

[0139] In one embodiment, the optical lens satisfies: 0.4≤R31 / F≤10.

[0140] In one embodiment, the curvature radius R52 of the second side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -20≤R52 / F<0.

[0141] In one embodiment, the radius of curvature R61 of the first side surface of the sixth lens and the total effective focal length F of the optical lens satisfy: <R61 / F≤20。

[0142] In one embodiment, a curvature radius R21 of the first side surface of the second lens and a curvature radius R22 of the second side surface of the second lens satisfy: -12≤R21 / R22<0.

[0143] In one embodiment, the optical lens satisfies: -8≤R21 / F≤-0.35.

[0144] In one embodiment, an air gap d23 between the second lens and the third lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.02≤d23 / TTL≤0.4.

[0145] In one embodiment, the optical lens satisfies: 0.035≤d23 / TTL≤0.25.

[0146] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -4≤F2 / F.

[0147] In one embodiment, the optical lens satisfies: -2.5≤F2 / F≤-0.3.

[0148] In one embodiment, the curvature radius R22 of the second side surface of the second lens and the total effective focal length F of the optical lens satisfy: <R22 / F≤5。

[0149] In one embodiment, the effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -8≤F8 / F.

[0150] In one embodiment, the optical lens satisfies: -5≤F8 / F≤-0.25.

[0151] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: F1 / F≤8.

[0152] In one embodiment, an air gap d67 between the sixth lens and the seventh lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following conditions: d67 / TTL≤0.05.

[0153] In one embodiment, the combined focal length F67 of the sixth lens and the seventh lens and the total effective focal length F of the optical lens satisfy the following relationship: 0.6≤|F67 / F|.

[0154] In one embodiment, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: 45°≤(FOV×F) / H.

[0155] In one embodiment, the optical lens satisfies: 50°≤(FOV×F) / H≤90°.

[0156] In one embodiment, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 1.0≤F / H≤2.5.

[0157] In one embodiment, the curvature radius R11 of the first side surface of the first lens, the maximum effective light-clearing aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the curvature radius R12 of the second side surface of the first lens, and the maximum effective light-clearing aperture D2 of the second side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: |(R11 / D1) / (R12 / D2)|≤1.

[0158] In one embodiment, the maximum field of view FOV of the optical lens, the maximum effective light clearance D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: D1 / H / FOV≤0.1.

[0159] In one embodiment, a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, a maximum field of view FOV of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy the following conditions: TTL / H / FOV≤0.2.

[0160] In one embodiment, the image height H corresponding to the maximum field of view angle of the optical lens, the total effective focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view angle of the optical lens satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5.

[0161] In one embodiment, the combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy the following conditions: <F45 / F≤3。

[0162] In one embodiment, a curvature radius R42 of the second side surface of the fourth lens and a curvature radius R51 of the first side surface of the fifth lens satisfy: -10≤R42 / R51≤4.

[0163] In one embodiment, an air gap d45 between the fourth lens and the fifth lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy the following conditions: d45 / TTL≤0.04.

[0164] In one embodiment, the combined focal length F34 of the third lens and the fourth lens and the total effective focal length F of the optical lens satisfy: |F34 / F|≤8.5.

[0165] In one embodiment, a curvature radius R32 of the second side surface of the third lens and a curvature radius R41 of the first side surface of the fourth lens satisfy: -6≤R32 / R41≤2.

[0166] In one embodiment, an air gap d34 between the third lens and the fourth lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d34 / TTL≤0.04.

[0167] In one embodiment, the curvature radius R21 of the first side surface of the second lens and the total effective focal length F of the optical lens satisfy: -12≤R21 / F<0.

[0168] In one embodiment, a curvature radius R62 of the second side surface of the sixth lens and a curvature radius R71 of the first side surface of the seventh lens satisfy: 0.7≤R62 / R71≤1.3.

[0169] On the other hand, the present application provides an electronic device, which includes the optical lens provided according to the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0170] This solution uses eight lenses. By optimizing the shape and optical power of each lens, the optical lens has at least one beneficial effect of high resolution, miniaturization, small aperture, low sensitivity, high light throughput, long focus, small distortion and high performance, so that the optical lens can better meet the application requirements of automotive front-view lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0171] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0172] FIG1 is a schematic structural diagram of an optical lens according to Example 1 of the present application;

[0173] FIG2 shows a schematic structural diagram of an optical lens according to Example 2 of the present application;

[0174] FIG3 shows a schematic structural diagram of an optical lens according to Example 3 of the present application;

[0175] FIG4 shows a schematic structural diagram of an optical lens according to Example 4 of the present application;

[0176] FIG5 shows a schematic structural diagram of an optical lens according to Example 5 of the present application;

[0177] FIG6 shows a schematic structural diagram of an optical lens according to Example 6 of the present application;

[0178] FIG7 shows a schematic structural diagram of an optical lens according to Example 7 of the present application;

[0179] FIG8 is a schematic structural diagram of an optical lens according to Example 8 of the present application;

[0180] FIG9 shows a schematic structural diagram of an optical lens according to Example 9 of the present application;

[0181] FIG10 is a schematic structural diagram of an optical lens according to Example 10 of the present application;

[0182] FIG11 is a schematic structural diagram of an optical lens according to Example 11 of the present application;

[0183] FIG12 is a schematic structural diagram of an optical lens according to Example 12 of the present application;

[0184] FIG13 shows a schematic diagram of the optical lens structure of Example 13 of the present application;

[0185] FIG14 shows a schematic diagram of the optical lens structure of Example 14 of the present application;

[0186] FIG15 is a schematic diagram showing the structure of an optical lens according to Example 15 of the present application;

[0187] FIG16 shows a schematic diagram of the optical lens structure of Example 16 of the present application;

[0188] FIG17 shows a schematic diagram of the optical lens structure of Example 17 of the present application;

[0189] FIG18 shows a schematic diagram of the optical lens structure of Example 18 of the present application;

[0190] FIG19 shows a schematic diagram of the optical lens structure of Example 19 of the present application;

[0191] FIG20 shows a schematic diagram of the optical lens structure of Example 20 of the present application;

[0192] FIG21 shows a schematic diagram of the optical lens structure of Example 21 of the present application;

[0193] FIG22 shows a schematic diagram of the optical lens structure of Example 22 of the present application;

[0194] FIG23 shows a schematic diagram of the optical lens structure of Example 23 of the present application;

[0195] FIG24 shows a schematic diagram of the optical lens structure of Example 24 of the present application;

[0196] FIG25 is a schematic diagram showing the structure of an optical lens according to Example 25 of the present application;

[0197] FIG26 is a schematic diagram showing the structure of an optical lens according to Example 26 of the present application;

[0198] FIG27 is a schematic diagram showing the structure of an optical lens according to Example 27 of the present application;

[0199] FIG28 is a schematic diagram showing the structure of an optical lens according to Example 28 of the present application;

[0200] FIG29 is a schematic diagram showing the structure of an optical lens according to Example 29 of the present application;

[0201] FIG30 is a schematic diagram showing the structure of an optical lens according to Example 30 of the present application;

[0202] FIG31 is a schematic diagram showing the structure of an optical lens according to Example 31 of the present application;

[0203] FIG32 is a schematic diagram showing the structure of an optical lens according to Example 32 of the present application;

[0204] FIG33 is a schematic diagram showing the structure of an optical lens according to Example 33 of the present application;

[0205] FIG34 is a schematic diagram showing the structure of an optical lens according to Example 34 of the present application;

[0206] FIG35 is a schematic diagram showing the structure of an optical lens according to Example 35 of the present application;

[0207] FIG36 is a schematic diagram showing the structure of an optical lens according to Example 36 of the present application;

[0208] FIG37 is a schematic diagram showing the structure of an optical lens according to Example 37 of the present application;

[0209] FIG38 is a schematic diagram showing the structure of an optical lens according to Example 38 of the present application;

[0210] FIG39 is a schematic diagram showing the structure of an optical lens according to Example 39 of the present application;

[0211] FIG40 is a schematic diagram showing the structure of an optical lens according to Example 40 of the present application;

[0212] FIG41 is a schematic diagram showing the structure of an optical lens according to Example 41 of the present application; and

[0213] Figure 42 is a schematic structural diagram of an optical lens according to Example 42 of the present application. DETAILED DESCRIPTION

[0214] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0215] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0216] In this application, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit this application.

[0217] It should be noted that in this specification, the terms "first," "second," "third," etc., are used solely to distinguish one feature from another and do not limit the features. Thus, the first lens discussed below could also be referred to as the second lens or the third lens without departing from the teachings of this application.

[0218] In the drawings, the thickness, size, and shape of the lenses are slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical and aspherical surfaces shown in the drawings are provided by way of example. That is, the shapes of the spherical and aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustration only and are not drawn strictly to scale.

[0219] In this article, the paraxial area refers to the area near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial area; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial area. The surface of each lens close to the first side is called the first side surface of the lens, and the surface of each lens close to the second side is called the second side surface of the lens. The judgment of the surface shape in the paraxial area can be based on the judgment method of ordinary knowledge in this field, and the positive and negative R value (R refers to the radius of curvature of the paraxial area, usually refers to the R value on the lens database (lens data) in the optical software) is used to judge the convexity and concavity. For the first side, when the R value is positive, it is judged to be convex, and when the R value is negative, it is judged to be concave; for the second side, when the R value is positive, it is judged to be concave, and when the R value is negative, it is judged to be convex.

[0220] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0221] In exemplary embodiments, the optical lens provided herein can be used as an automotive lens. For an automotive lens, the left side is the object side, and the right side is the image side. The first side is the object side, and the second side is the image side. Light from the object side forms an image on the image side.

[0222] When the optical lens of the present application is used in a projection lens or a radar transmitter lens, the left side is the imaging side, and the right side is the image source side. In exemplary embodiments, the optical lens provided by the present application can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side, and the imaging surface of the optical lens is the image source surface.

[0223] Technical Solution 1

[0224] In order to solve the problem in the prior art that optical lenses are difficult to achieve simultaneously high resolution, miniaturization, back focal length, small CRA, low sensitivity and high light throughput, the present application provides an optical lens and an electronic device.

[0225] Example 1

[0226] As shown in Figures 1 to 12, the optical lens includes, from the first side to the second side, a first lens with positive optical power, a second lens with negative optical power, a third lens with positive optical power, a fourth lens with optical power, and a fifth lens with optical power; the first side surface of the first lens is convex; the first side surface of the second lens is concave, and the second side surface is concave; the second side surface of the third lens is convex; the first side surface of the fourth lens is convex; and the sixth lens has negative optical power.

[0227] The first lens has positive optical power. Its first side is convex, which reduces the incident angle of light and the corresponding image height for the same field of view, helping to receive light from a wider angle and increase luminous flux. The second side of the first lens can be either concave or convex. A concave second side smoothes the path of light, improving resolution and reducing system sensitivity. A convex second side further compresses light, reducing the aperture of subsequent lenses and achieving miniaturization.

[0228] The second lens has negative optical power, and the first side surface of the second lens is concave, which effectively smooths the trend of the front light, diverges the light, reduces the system sensitivity, and is beneficial to the subsequent increase of the image surface and the correction of aberrations; the second side surface is concave, which further diverges the light. Under the same field of view angle conditions, the subsequent optical system can have a larger light receiving surface, expand the image surface, and at the same time realize the increase of the physical aperture of the diaphragm, the aperture becomes larger, and a larger amount of light is achieved, thereby increasing the brightness of the image surface.

[0229] The third lens has positive focal power, and the first side surface of the third lens can be either convex or concave. When the first side surface of the third lens is convex, it can effectively converge light, smooth the light trend, reduce system sensitivity, and reduce the rear port diameter, which is conducive to miniaturization; when the first side surface of the third lens is concave, it can provide a larger light receiving surface for the subsequent optical system, which is conducive to balancing aberrations and improving resolution; the second side surface of the third lens is convex, and its shape is significantly different from the first side surface of the fourth lens, which further changes the light trend, compresses the subsequent diameter, and helps to achieve miniaturization.

[0230] The fourth lens element has positive or negative focal power, and its first side is convex, effectively changing the light path, converging it, and compressing the rear port diameter. The second side of the fourth lens element can be convex or concave. When the second side of the fourth lens element is convex, it facilitates double bonding with the fifth lens element. With a proper distribution of the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance image resolution. When the second side of the fourth lens element is concave, it facilitates double bonding with the fifth lens element. With a proper distribution of the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance image resolution.

[0231] The optical power of the fifth lens can be positive or negative. When the optical power of the fifth lens is negative, it is beneficial for diverging light. When the optical power of the fifth lens is positive, it helps to reduce the diameter of the rear port and achieve miniaturization.

[0232] The sixth lens has negative optical power, which facilitates the smooth transition of light to the imaging surface and ensures imaging stability.

[0233] The present application adopts six lenses, and by optimizing the optical focal length and surface shape of each lens, the optical lens of the present application has at least one beneficial effect of high resolution, miniaturization, back focal length, small CRA, low sensitivity and high light throughput.

[0234] In this embodiment, the second side surface of the first lens is concave, which smoothes the light trajectory, improves image resolution, and reduces system sensitivity.

[0235] In this embodiment, the second side surface of the first lens is a convex surface, which can further compress the light, reduce the aperture of subsequent lenses, and achieve miniaturization.

[0236] In this embodiment, the first side surface of the third lens is a convex surface, which can effectively converge light, smooth the light trend, reduce system sensitivity, and reduce the back port diameter, thereby facilitating miniaturization.

[0237] In this embodiment, the first side surface of the third lens is a concave surface. When the first side surface of the third lens is a concave surface, the subsequent optical system can have a larger light receiving surface, which is beneficial for balancing aberrations and improving resolution.

[0238] In this embodiment, the fourth lens element has positive optical power, and its second side surface is convex. This convex second side surface facilitates double bonding with the fifth lens element, effectively improving aberrations and enhancing resolution while properly distributing the refractive indices of the fourth and fifth lenses.

[0239] In this embodiment, the fourth lens element has negative optical power, and its second side surface is concave. This concave second side surface facilitates double bonding with the fifth lens element. While properly distributing the refractive indices of the fourth and fifth lenses, it also effectively improves aberrations and enhances resolution.

[0240] In this embodiment, the fifth lens element has negative optical power, with a concave first side surface and a convex second side surface. This convex second side surface helps reduce the rear port diameter and achieve miniaturization. Furthermore, its radius of curvature is significantly greater than that of the first side surface of the sixth lens element, effectively reducing system sensitivity and minimizing ghost images in this area while maintaining high resolution.

[0241] In this embodiment, the fifth lens element has negative optical power, and both its first and second side surfaces are concave. The concave second side surface of the fifth lens element helps increase back focal length and reduce CRA. Furthermore, its curvature radius is significantly greater than that of the first side surface of the sixth lens element. This effectively reduces system sensitivity and mitigates ghost images in this area while maintaining high resolution.

[0242] In this embodiment, the fifth lens element has positive optical power, with a convex first side surface and a concave second side surface. This convex first side surface of the fifth lens element, when combined with the fourth lens element to form a double cemented bond, effectively improves aberrations and enhances image resolution by properly distributing the refractive indices of the fourth and fifth lenses. The fifth lens element's positive optical power contributes to a smaller rear port diameter, achieving miniaturization.

[0243] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface is convex. The concave first side surface of the sixth lens diverges the front light, which helps increase the back focus and facilitate module assembly. It also expands the image plane and reduces the CRA. The convex second side surface helps reduce the back port diameter and achieve miniaturization.

[0244] In this embodiment, the first side surface and the second side surface of the sixth lens are concave. The second side surface of the sixth lens is concave, which is beneficial for increasing the back focus and facilitating module assembly; at the same time, it expands the image plane and reduces the CRA.

[0245] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave. The convex first side surface of the sixth lens helps to balance aberrations and reduce the back port diameter to achieve miniaturization.

[0246] In this embodiment, the fourth lens and the fifth lens are bonded together to form a double bonded lens. The bonding of the fourth lens and the fifth lens can smoothly transition the light passing through the third lens to the imaging surface, reducing the total length. Various aberrations of the optical system are fully corrected, and while maintaining a compact structure, the resolution can be improved, and optical properties such as distortion and CRA can be optimized. By providing a double bonded lens, the air gap between the two lenses can be reduced, reducing the total length of the system; at the same time, the number of assembly components between the fourth lens and the fifth lens can be reduced, reducing the number of processes and reducing costs; at the same time, the sensitivity of lens units to tolerances such as tilt / eccentricity generated during the assembly process can be reduced; the light loss caused by reflection between lenses can also be reduced, improving illumination; further, the field curvature can be reduced, and the off-axis point aberrations of the system can be corrected.

[0247] In this embodiment, the optical lens further includes an aperture, which is disposed between the second and third lenses. Placing the aperture between the second and third lenses facilitates effective convergence of light entering the optical system, reduces the aperture of the lens at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0248] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens) and the overall focal length F of the optical lens satisfy the following relationship: TTL / F ≤ 4. Keeping the total optical length and overall focal length of the optical lens within this range allows for system miniaturization. Preferably, TTL / F ≤ 3.

[0249] In this embodiment, the optical lens's focal length F, the optical lens's maximum field of view angle (in radians) θ, and the maximum clear aperture D of the first side surface of the first lens satisfy the following relationship: (F*θ) / D ≥ 0.2. This allows for a smaller front-end diameter of the optical lens, reducing the size of the optical lens' imaging system. Preferably, (F*θ) / D ≥ 0.4.

[0250] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.08. Meeting this conditional equation ensures a small front-end diameter, enabling miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0251] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: D / H / F ≤ 0.2. Meeting this conditional equation allows the optical lens to achieve a large target surface and small aperture at a fixed focal length. Preferably, D / H / F ≤ 0.1.

[0252] In this embodiment, the focal length F of the optical lens and the arc value θ of the optical lens' maximum field of view satisfy the following relationship: F / θ ≤ 30. This optimal focal length to field of view ratio ensures low system sensitivity while achieving a small CRA, long back focus, and high resolution. Preferably, 25 ≤ F / θ ≤ 29.5.

[0253] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: |(HF*θ) / (F*θ)|≤0.06. Meeting this conditional equation ensures that the focal length of the optical lens is increased while the field of view and the size of the imaging surface remain unchanged, thereby highlighting the imaging effect in the central area of ​​the imaging surface of the optical lens. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0254] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 3. Meeting this conditional expression helps maintain a low FNO and maximize light throughput. Preferably, F / ENPD ≤ 2.5.

[0255] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following conditions: 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 2. This condition reflects the ratio of the actual image height to the ideal image height, enabling high angular resolution. Preferably, 0.8 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 1.5.

[0256] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the following relationship: |R4 / R5|≤20. The similar curvatures of the adjacent lenses of the second and third lenses can correct aberrations of the optical system and ensure smooth light passing through the first lens, thereby reducing the tolerance sensitivity of the optical system. Preferably, |R4 / R5|≤10.

[0257] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the radius of curvature R11 of the first side surface of the sixth lens element satisfy the following relationship: |R10 / R11|≥4.3. This conditional relationship results in a large ratio of the curvature radii of adjacent surfaces, effectively reducing system sensitivity while ensuring high resolution. This helps to concentrate ghost image energy away from the imaging plane, effectively reducing ghost images in that area. Preferably, |R10 / R11|≥4.45.

[0258] In this embodiment, the focal length F6 of the sixth lens element satisfies the following relationship with the focal length F of the entire optical lens set: F6 / F ≥ -7. The sixth lens element has a negative optical power, which controls the ratio of the sixth lens element's focal length to the focal length of the entire optical lens set. This ensures a smooth transition of light to the imaging plane while increasing back focus, facilitating overall assembly. Preferably, -5 ≤ F6 / F ≤ -0.2.

[0259] In this embodiment, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy the following relationship: -5 ≤ F2 / F3 ≤ -0.02. Keeping the focal lengths of the second and third lenses opposite in sign and close in value facilitates smooth light transitions and balances aberrations. Preferably, -3 ≤ F2 / F3 ≤ -0.05.

[0260] In this embodiment, the focal length F of the optical lens, the radius of curvature R3 of the first side surface of the second lens element, and the radius of curvature R4 of the second side surface of the second lens element satisfy the following relationship: |F / R3| + |F / R4| ≤ 8. Meeting this conditional equation facilitates controlling the surface curvature of the second lens element, appropriately diverging light, and providing a larger light-receiving surface for the subsequent optical system, thereby balancing aberrations and increasing light intake. Preferably, |F / R3| + |F / R4| ≤ 6.

[0261] In this embodiment, the air spacing d7 between the third and fourth lenses and the optical back focus of the optical lens, i.e., the distance BFL from the center of the second side of the last lens in the optical lens to the center of the imaging plane, satisfy the following equation: (d7*BFL) / (d7+BFL)≤1. Meeting this conditional equation helps balance the ratio of the optical back focus to the spacing between the third and fourth lenses, thereby increasing assembly yield and ensuring sufficient back focus for the optical system to accommodate other optical components, thereby increasing design flexibility. Preferably, (d7*BFL) / (d7+BFL)≤0.5.

[0262] In this embodiment, the radius of curvature R6 of the second side surface of the third lens element satisfies the following relationship with the focal length F of the entire optical lens set: |R6 / F| ≤ 10. Controlling the radius of curvature of the second side surface of the third lens element facilitates a smooth transition of light to the rear, reduces aberrations, and improves resolution. Preferably, |R6 / F| ≤ 6.

[0263] In this embodiment, the radius of curvature R7 of the first side surface of the fourth lens element satisfies the following relationship with the focal length F of the entire optical lens set: R7 / F ≤ 7. Controlling the radius of curvature of the first side surface of the fourth lens element converges light, lowering its incidence position on the subsequent optical system and reducing the diameter of the rear port. Preferably, R7 / F ≤ 5.

[0264] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element satisfies the following relationship with the overall focal length F of the optical lens set: |R10 / F| ≥ 1.2. By increasing the radius of curvature of the second side surface of the fifth lens element, light transitions are smoother, effectively reducing system sensitivity and minimizing ghost images in this area. Preferably, |R10 / F| ≥ 1.5.

[0265] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens element satisfies the following relationship with the focal length F of the entire optical lens set: |R11 / F| ≤ 5. Meeting this conditional relationship increases back focus, facilitating module assembly, while also expanding the image plane and reducing CRA. Preferably, |R11 / F| ≤ 3.

[0266] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens element) satisfy the following equation: |R10 / TTL| ≥ 0.8. Meeting this condition reduces system sensitivity while achieving miniaturization. Preferably, |R10 / TTL| ≥ 0.85.

[0267] In this embodiment, the center thickness d6 of the third lens element and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens, satisfy the following relationship: d6 / TTL ≥ 0.02. A larger center thickness of the third lens element facilitates lens manufacturability and, when used with the second lens element, which has a negative focal length, stabilizes light flow. Preferably, d6 / TTL ≥ 0.04.

[0268] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens element) and the center thickness d11 of the sixth lens element satisfy the following equation: TTL / d11 ≥ 6. This condition is met by properly matching the center thickness of the sixth lens element with the total optical length, achieving both miniaturization and a small CRA. Preferably, TTL / d11 ≥ 9.

[0269] In this embodiment, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens) satisfy the following relationship: (d8 + d9) / TTL ≥ 0.05. The larger center thickness of the cemented doublet of the fourth and fifth lenses improves lens processability and ensures smooth light distribution. Preferably, (d8 + d9) / TTL ≥ 0.1.

[0270] In this embodiment, the distance d26 between the first and third lenses, the center thickness d6 of the third lens, and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following relationship: |(d26-d6) / TTL|≤0.15. By designing and controlling the difference between the distance between the first and third lenses and the center thickness of the third lens so that their ratio to the total length is small, the system sensitivity can be effectively reduced and ghost images reflected from various surfaces at that location can be mitigated. Preferably, |(d26-d6) / TTL|≤0.05. More preferably, |(d26-d6) / TTL|≤0.01.

[0271] In this embodiment, the center thickness d3 of the second lens and the center thickness d6 of the third lens satisfy the following relationship: 0.2 ≤ d3 / d6. Properly controlling the ratio of the center thicknesses of the second and third lenses can effectively reduce system sensitivity and improve assembly yield. Preferably, 0.3 ≤ d3 / d6 ≤ 1.8. More preferably, 0.38 ≤ |d3 / d6| ≤ 1.2.

[0272] In this embodiment, the distance d26 between the first and third lenses, the center thickness d6 of the third lens, and the radius of curvature R5 of the first side surface of the third lens satisfy the following relationship: |(d26 - d6) / R5| ≤ 0.4. The difference between the distance between the first and third lenses and the center thickness of the third lens is designed to be small relative to the radius of curvature of the first side surface of the third lens. This effectively reduces system sensitivity and mitigates ghost images reflected from various surfaces in this area. Preferably, |(d26 - d6) / R5| ≤ 0.05. More preferably, (d26 - d6) / R5| ≤ 0.03.

[0273] In this embodiment, the maximum clear aperture D of the first side surface of the first lens and the radius of curvature R1 of the first side surface of the first lens satisfy the following relationship: D / R1 ≥ 0.05. Controlling the maximum clear aperture and the radius of curvature of the first side surface of the first lens can simultaneously achieve a small front-end aperture and high light throughput. Preferably, D / R1 ≥ 0.2.

[0274] In this embodiment, the maximum effective aperture D7 of the first side surface of the fourth lens element, corresponding to the maximum field of view of the optical lens, the radius of curvature R7 of the first side surface of the fourth lens element, and the sag height SAG7 of the first side surface of the fourth lens element satisfy the following conditions: arctan(D7 / (R7-SAG7))≥0.2. Properly controlling the sag angle of the first side surface of the fourth lens element helps reduce ghost images. Preferably, arctan(D7 / (R7-SAG7))≥0.4.

[0275] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens, the center thickness d8 of the fourth lens, and the center thickness d9 of the fifth lens satisfy the following relationship: |R10 / (d8+d9)|≥2.5. Properly controlling the ratio of the radius of curvature of the second side surface of the doublet lens to the center thickness of the doublet lens can effectively reduce ghost images produced by the doublet lens, while also smoothing the light path in that area and reducing system sensitivity. Preferably, |R10 / (d8+d9)|≥2.95. More preferably, |R10 / (d8+d9)|≥3.2.

[0276] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the center thickness d9 of the fifth lens element satisfy the following relationship: |R10 / d9| ≥ 5.2. Properly controlling the radius of curvature of the second side surface of the fifth lens element and the center thickness of the fifth lens element can smooth the light emitted from the doublet lens, effectively reducing the CRA and lowering system sensitivity. Preferably, |R10 / d9| ≥ 5.3. More preferably, |R10 / d9| ≥ 6.

[0277] In this embodiment, the radius of curvature R12 of the second side surface of the sixth lens element and the center thickness d11 of the sixth lens element satisfy the following relationship: |R12 / d11|≤55. The ratio of the radius of curvature of the second side surface of the final lens element to its center thickness is controlled to be moderate, ensuring that ghost images can be reduced at a small CRA while improving the manufacturability of the lens. Preferably, |R12 / d11|≤22. More preferably, |R12 / d11|≤18.5.

[0278] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens element and the radius of curvature R12 of the second side surface of the sixth lens element satisfy the following relationship: |R11 / R12| ≥ 0.1. The ratio of the radius of curvature of the first and second side surfaces of the final lens element is controlled to be moderate, ensuring a small CRA while reducing ghost images there. Preferably, |R11 / R12| ≥ 0.25. More preferably, |R11 / R12| ≥ 0.32.

[0279] Example 2

[0280] As shown in Figures 1 to 12, the optical lens includes, from the first side to the second side, a first lens element with positive optical power; a second lens element with negative optical power; a third lens element with positive optical power; a fourth lens element with optical power; a fifth lens element with optical power; and a sixth lens element with negative optical power. The radius of curvature R10 of the second side surface of the fifth lens element and the radius of curvature R11 of the first side surface of the sixth lens element satisfy the following condition: |R10 / R11|≥4.3. Meeting this conditional equation results in a larger ratio of the curvature radii of adjacent surfaces, effectively reducing system sensitivity while ensuring high resolution. This helps to concentrate the energy of ghost images away from the imaging plane, effectively reducing ghost images in that area. Preferably, |R10 / R11|≥4.45.

[0281] In this embodiment, the first side surface of the first lens is convex, which can reduce the incident angle of light and the corresponding image height under the same field of view, helping to receive light at a wider angle and increase the luminous flux; the second side surface is concave, which smoothes the direction of light, improves resolution, and reduces system sensitivity.

[0282] In this embodiment, the first side surface of the first lens is convex, which can make the incident angle of light smaller and the corresponding image height smaller under the same field of view, which helps to receive light at a larger angle and increase the luminous flux; the second side surface of the first lens is convex, which can further compress the light, reduce the aperture of the subsequent lens, and achieve miniaturization.

[0283] In this embodiment, the first side surface of the second lens is concave, which effectively smooths the trend of the front light, diverges the light, reduces the system sensitivity, and is beneficial to the subsequent enlargement of the image plane and the correction of aberrations; the second side surface is concave, which further diverges the light. Under the same field of view angle conditions, the subsequent optical system can have a larger light receiving surface, expand the image plane, and at the same time realize the increase in the physical diameter of the diaphragm, the aperture becomes larger, and a larger amount of light is achieved, thereby increasing the brightness of the image plane.

[0284] In this embodiment, the first side surface of the third lens is convex, which can effectively converge light, smooth the light trend, reduce system sensitivity, and reduce the rear port diameter, which is conducive to miniaturization; the second side surface is convex, which is significantly different in shape from the first side surface of the fourth lens, further changing the light trend, compressing the subsequent diameter, and helping to achieve miniaturization.

[0285] In this embodiment, the first side surface of the third lens is concave, which allows the subsequent optical system to have a larger light-receiving surface, which is beneficial for balancing aberrations and improving resolution. The second side surface is convex, which is significantly different in shape from the first side surface of the fourth lens, further changing the light distribution, compressing the subsequent aperture, and helping to achieve miniaturization.

[0286] In this embodiment, the fourth lens element has positive focal power, and the first side surface of the fourth lens element is convex, which effectively changes the direction of light, converges light, and compresses the rear port diameter. The second side surface is convex, which facilitates the double bonding with the fifth lens element. Under the premise of properly distributing the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance resolution.

[0287] In this embodiment, the fourth lens element has negative optical power, and the first side surface of the fourth lens element is convex, which effectively changes the direction of light, converges light, and compresses the rear port diameter. The second side surface is concave, which is conducive to achieving double bonding with the fifth lens element. Under the premise of reasonably distributing the refractive indices of the fourth and fifth lenses, it can also effectively improve aberrations and enhance resolution.

[0288] In this embodiment, the fifth lens element has negative optical power, with a concave first side surface and a convex second side surface. This convex second side surface helps reduce the rear port diameter and achieve miniaturization. Furthermore, its radius of curvature is significantly greater than that of the first side surface of the sixth lens element, effectively reducing system sensitivity and minimizing ghost images in this area while maintaining high resolution.

[0289] In this embodiment, the fifth lens element has negative optical power, and both its first and second side surfaces are concave. The concave second side surface of the fifth lens element helps increase back focal length and reduce CRA. Furthermore, its curvature radius is significantly greater than that of the first side surface of the sixth lens element. This effectively reduces system sensitivity and mitigates ghost images in this area while maintaining high resolution.

[0290] In this embodiment, the fifth lens element has positive optical power, with a convex first side surface and a concave second side surface. This convex first side surface of the fifth lens element, when combined with the fourth lens element to form a double cemented bond, effectively improves aberrations and enhances image resolution by properly distributing the refractive indices of the fourth and fifth lenses. The fifth lens element's positive optical power contributes to a smaller rear port diameter, achieving miniaturization.

[0291] In this embodiment, the first side surface of the sixth lens is concave, and the second side surface is convex. The concave first side surface of the sixth lens diverges the front light, which helps increase the back focus and facilitate module assembly. It also expands the image plane and reduces the CRA. The convex second side surface helps reduce the back port diameter and achieve miniaturization.

[0292] In this embodiment, the first side surface and the second side surface of the sixth lens are concave. The second side surface of the sixth lens is concave, which is beneficial for increasing the back focus and facilitating module assembly; at the same time, it expands the image plane and reduces the CRA.

[0293] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is concave. The convex first side surface of the sixth lens helps to balance aberrations and reduce the back port diameter to achieve miniaturization.

[0294] In this embodiment, the fourth lens and the fifth lens are bonded together to form a double bonded lens. The bonding of the fourth lens and the fifth lens can smoothly transition the light passing through the third lens to the imaging surface, reducing the total length. Various aberrations of the optical system are fully corrected, and while maintaining a compact structure, the resolution can be improved, and optical properties such as distortion and CRA can be optimized. By providing a double bonded lens, the air gap between the two lenses can be reduced, reducing the total length of the system; at the same time, the number of assembly components between the fourth lens and the fifth lens can be reduced, reducing the number of processes and reducing costs; at the same time, the sensitivity of lens units to tolerances such as tilt / eccentricity generated during the assembly process can be reduced; the light loss caused by reflection between lenses can also be reduced, improving illumination; further, the field curvature can be reduced, and the off-axis point aberrations of the system can be corrected.

[0295] In this embodiment, the optical lens further includes an aperture, which is disposed between the second and third lenses. Placing the aperture between the second and third lenses facilitates effective convergence of light entering the optical system, reduces the aperture of the lens at the rear end of the optical system, and reduces the assembly sensitivity of the system.

[0296] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens) and the overall focal length F of the optical lens satisfy the following relationship: TTL / F ≤ 4. Keeping the total optical length and overall focal length of the optical lens within this range allows for system miniaturization. Preferably, TTL / F ≤ 3.

[0297] In this embodiment, the optical lens's focal length F, the optical lens's maximum field of view angle (in radians) θ, and the maximum clear aperture D of the first side surface of the first lens satisfy the following relationship: (F*θ) / D ≥ 0.2. This allows for a smaller front-end diameter of the optical lens, reducing the size of the optical lens' imaging system. Preferably, (F*θ) / D ≥ 0.4.

[0298] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV ≤ 0.08. Meeting this conditional equation ensures a small front-end diameter, enabling miniaturization. Preferably, D / H / FOV ≤ 0.05.

[0299] In this embodiment, the maximum clear aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens, and the overall focal length F of the optical lens satisfy the following equation: D / H / F ≤ 0.2. Meeting this conditional equation allows the optical lens to achieve a large target surface and small aperture at a fixed focal length. Preferably, D / H / F ≤ 0.1.

[0300] In this embodiment, the focal length F of the optical lens and the arc value θ of the optical lens' maximum field of view satisfy the following relationship: F / θ ≤ 30. This optimal focal length to field of view ratio ensures low system sensitivity while achieving a small CRA, long back focus, and high resolution. Preferably, 25 ≤ F / θ ≤ 29.5.

[0301] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following equation: |(HF*θ) / (F*θ)|≤0.06. Meeting this conditional equation ensures that the focal length of the optical lens is increased while the field of view and the size of the imaging surface remain unchanged, thereby highlighting the imaging effect in the central area of ​​the imaging surface of the optical lens. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0302] In this embodiment, the optical lens's focal length F and its entrance pupil diameter ENPD satisfy the following relationship: F / ENPD ≤ 3. Meeting this conditional expression helps maintain a low FNO and maximize light throughput. Preferably, F / ENPD ≤ 2.5.

[0303] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the focal length F of the optical lens, and the arc value θ of the maximum field of view of the optical lens satisfy the following conditions: 0.4 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 2. This condition reflects the ratio of the actual image height to the ideal image height, enabling high angular resolution. Preferably, 0.8 ≤ (H / 2) / (F*tan(θ / 2)) ≤ 1.5.

[0304] In this embodiment, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy the following relationship: |R4 / R5|≤20. The similar curvatures of the adjacent lenses of the second and third lenses can correct aberrations of the optical system and ensure smooth light passing through the first lens, thereby reducing the tolerance sensitivity of the optical system. Preferably, |R4 / R5|≤10.

[0305] In this embodiment, the focal length F6 of the sixth lens element satisfies the following relationship with the focal length F of the entire optical lens set: F6 / F ≥ -7. The sixth lens element has a negative optical power, which controls the ratio of the sixth lens element's focal length to the focal length of the entire optical lens set. This ensures a smooth transition of light to the imaging plane while increasing back focus, facilitating overall assembly. Preferably, -5 ≤ F6 / F ≤ -0.2.

[0306] In this embodiment, the focal length F2 of the second lens element and the focal length F3 of the third lens element satisfy the following relationship: -5 ≤ F2 / F3 ≤ -0.02. Having the focal lengths of the second and third lenses, two adjacent lenses, have opposite signs but similar values, facilitates smooth light transitions and balances aberrations. Preferably, -3 ≤ F2 / F3 ≤ -0.05.

[0307] In this embodiment, the focal length F of the optical lens, the radius of curvature R3 of the first side surface of the second lens element, and the radius of curvature R4 of the second side surface of the second lens element satisfy the following relationship: |F / R3| + |F / R4| ≤ 8. Meeting this conditional equation facilitates controlling the surface curvature of the second lens element, appropriately diverging light, and providing a larger light-receiving surface for the subsequent optical system, thereby balancing aberrations and increasing light intake. Preferably, |F / R3| + |F / R4| ≤ 6.

[0308] In this embodiment, the air spacing d7 between the third and fourth lenses and the optical back focus of the optical lens, i.e., the distance BFL from the center of the second side of the last lens in the optical lens to the center of the imaging plane, satisfy the following equation: (d7*BFL) / (d7+BFL)≤1. Meeting this conditional equation helps balance the ratio of the optical back focus to the spacing between the third and fourth lenses, thereby increasing assembly yield and ensuring sufficient back focus for the optical system to accommodate other optical components, thereby increasing design flexibility. Preferably, (d7*BFL) / (d7+BFL)≤0.5.

[0309] In this embodiment, the radius of curvature R6 of the second side surface of the third lens element satisfies the following relationship with the focal length F of the entire optical lens set: |R6 / F| ≤ 10. Controlling the radius of curvature of the second side surface of the third lens element facilitates a smooth transition of light to the rear, reduces aberrations, and improves resolution. Preferably, |R6 / F| ≤ 6.

[0310] In this embodiment, the radius of curvature R7 of the first side surface of the fourth lens element satisfies the following relationship with the focal length F of the entire optical lens set: R7 / F ≤ 7. Controlling the radius of curvature of the first side surface of the fourth lens element converges light, lowering its incidence position on the subsequent optical system and reducing the diameter of the rear port. Preferably, R7 / F ≤ 5.

[0311] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element satisfies the following relationship with the overall focal length F of the optical lens set: |R10 / F| ≥ 1.2. By increasing the radius of curvature of the second side surface of the fifth lens element, light transitions are smoother, effectively reducing system sensitivity and minimizing ghost images in this area. Preferably, |R10 / F| ≥ 1.5.

[0312] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens element satisfies the following relationship with the focal length F of the entire optical lens set: |R11 / F| ≤ 5. Meeting this conditional relationship increases back focus, facilitating module assembly, while also expanding the image plane and reducing CRA. Preferably, |R11 / F| ≤ 3.

[0313] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens element) satisfy the following equation: |R10 / TTL| ≥ 0.8. Meeting this condition reduces system sensitivity while achieving miniaturization. Preferably, |R10 / TTL| ≥ 0.85.

[0314] In this embodiment, the center thickness d6 of the third lens element and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens, satisfy the following relationship: d6 / TTL ≥ 0.02. A larger center thickness of the third lens element facilitates lens manufacturability and, when used with the second lens element, which has a negative focal length, stabilizes light flow. Preferably, d6 / TTL ≥ 0.04.

[0315] In this embodiment, the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens element to the center of the imaging plane of the optical lens element) and the center thickness d11 of the sixth lens element satisfy the following equation: TTL / d11 ≥ 6. This condition is met by properly matching the center thickness of the sixth lens element with the total optical length, achieving both miniaturization and a small CRA. Preferably, TTL / d11 ≥ 9.

[0316] In this embodiment, the center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens, and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens) satisfy the following relationship: (d8 + d9) / TTL ≥ 0.05. The larger center thickness of the cemented doublet of the fourth and fifth lenses improves lens processability and ensures smooth light distribution. Preferably, (d8 + d9) / TTL ≥ 0.1.

[0317] In this embodiment, the distance d26 between the first and third lenses, the center thickness d6 of the third lens, and the total optical length of the optical lens (i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens) satisfy the following relationship: |(d26 - d6) / TTL| ≤ 0.15. By designing and controlling the difference between the distance between the first and third lenses and the center thickness of the third lens to minimize their ratio to the total optical length, system sensitivity can be effectively reduced and ghost images reflected from various surfaces in this area can be mitigated. Preferably, |(d26 - d6) / TTL| ≤ 0.05.

[0318] In this embodiment, the center thickness d3 of the second lens and the center thickness d6 of the third lens satisfy the following relationship: 0.2 ≤ d3 / d6. Properly controlling the ratio of the center thicknesses of the second and third lenses can effectively reduce system sensitivity and improve assembly yield. Preferably, 0.3 ≤ d3 / d6 ≤ 1.8.

[0319] In this embodiment, the distance d26 between the first and third lenses, the center thickness d6 of the third lens, and the radius of curvature R5 of the first side surface of the third lens satisfy the following relationship: |(d26 - d6) / R5| ≤ 0.4. The difference between the distance between the first and third lenses and the center thickness of the third lens is designed to minimize its ratio to the radius of curvature of the first side surface of the third lens, effectively reducing system sensitivity and minimizing ghost images reflected from various surfaces in this area. Preferably, |(d26 - d6) / R5| ≤ 0.05.

[0320] In this embodiment, the maximum clear aperture D of the first side surface of the first lens and the radius of curvature R1 of the first side surface of the first lens satisfy the following relationship: D / R1 ≥ 0.05. Controlling the maximum clear aperture and the radius of curvature of the first side surface of the first lens can simultaneously achieve a small front-end aperture and high light throughput. Preferably, D / R1 ≥ 0.2.

[0321] In this embodiment, the maximum effective aperture D7 of the first side surface of the fourth lens element, corresponding to the maximum field of view of the optical lens, the radius of curvature R7 of the first side surface of the fourth lens element, and the sag height SAG7 of the first side surface of the fourth lens element satisfy the following conditions: arctan(D7 / (R7-SAG7))≥0.2. Properly controlling the sag angle of the first side surface of the fourth lens element helps reduce ghost images. Preferably, arctan(D7 / (R7-SAG7))≥0.4.

[0322] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens, the center thickness d8 of the fourth lens, and the center thickness d9 of the fifth lens satisfy the following relationship: |R10 / (d8+d9)|≥2.5. Properly controlling the ratio of the radius of curvature of the second side surface of the doublet lens to the center thickness of the doublet lens can effectively reduce ghost images produced by the doublet lens, while also smoothing the light path in that area and reducing system sensitivity. Preferably, |R10 / (d8+d9)|≥2.95. More preferably, |R10 / (d8+d9)|≥3.2.

[0323] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the center thickness d9 of the fifth lens element satisfy the following relationship: |R10 / d9| ≥ 5.2. Properly controlling the radius of curvature of the second side surface of the fifth lens element and the center thickness of the fifth lens element can smooth the light emitted from the doublet lens, effectively reducing the CRA and lowering system sensitivity. Preferably, |R10 / d9| ≥ 5.3. More preferably, |R10 / d9| ≥ 6.

[0324] In this embodiment, the radius of curvature R12 of the second side surface of the sixth lens element and the center thickness d11 of the sixth lens element satisfy the following relationship: |R12 / d11|≤55. The ratio of the radius of curvature of the second side surface of the final lens element to its center thickness is controlled to be moderate, ensuring that ghost images can be reduced at a small CRA while improving the manufacturability of the lens. Preferably, |R12 / d11|≤22. More preferably, |R12 / d11|≤18.5.

[0325] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens element and the radius of curvature R12 of the second side surface of the sixth lens element satisfy the following relationship: |R11 / R12| ≥ 0.1. The ratio of the radius of curvature of the first and second side surfaces of the final lens element is controlled to be moderate, ensuring a small CRA while reducing ghost images there. Preferably, |R11 / R12| ≥ 0.25. More preferably, |R11 / R12| ≥ 0.32.

[0326] Optionally, the optical lens may further include a color filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0327] The optical lens in the present application may adopt multiple lenses, such as the six lenses mentioned above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the focus is on imaging quality, the number of aspherical lenses can be increased. The characteristics of aspherical lenses are: the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike spherical lenses with a constant curvature from the center of the lens to the periphery of the lens, aspherical lenses have better curvature radius characteristics, and have the advantages of improving distortion aberration and improving astigmatism aberration. After adopting aspherical lenses, the aberrations that occur during imaging can be eliminated as much as possible, thereby improving imaging quality.

[0328] In an exemplary embodiment, this solution does not limit the plastic or glass of the lenses. If temperature performance is the focus, the first, second, third, fourth, fifth, and sixth lenses can all be glass lenses. Optical lenses made of glass can suppress the deviation of the optical lens back focus with temperature changes, thereby improving system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the operating environment, which affects the normal use of the optical lens. For example, an optical lens with an all-glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when the focus is on resolution quality and reliability, the first to sixth lenses can all be glass aspheric lenses. Of course, in applications where temperature stability requirements are lower, the first to sixth lenses in the optical lens can also be made of plastic. Making optical lenses out of plastic can effectively reduce production costs. Of course, the first to sixth lenses in the optical lens can also be made of a combination of plastic and glass.

[0329] The present application also provides an electronic device comprising the above-described optical lens and an imaging element that converts an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0330] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while six lenses are described in the embodiments, the optical lens is not limited to six lenses. If desired, the optical lens may include other numbers of lenses.

[0331] It should be noted that any of the following examples 1 to 12 are applicable to embodiment 1 and embodiment 2 of the present application.

[0332] Example 1

[0333] FIG1 is a schematic diagram of the optical lens structure of Example 1.

[0334] As shown in FIG1 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0335] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0336] In this example, the total effective focal length F of the optical lens is 16.429 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 31.677 mm.

[0337] Table 1 shows the basic structural parameters of the optical lens of Example 1, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0338] Table 1

[0339] Example 2

[0340] FIG2 is a schematic diagram of the optical lens structure of Example 2.

[0341] As shown in FIG2 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0342] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0343] In this example, the total effective focal length F of the optical lens is 15.906 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 28.947 mm.

[0344] Table 2 shows the basic structural parameters of the optical lens of Example 2, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0345] Table 2

[0346] Example 3

[0347] FIG3 is a schematic diagram of the optical lens structure of Example 3.

[0348] As shown in FIG3 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0349] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0350] In this example, the total effective focal length F of the optical lens is 15.907 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 31.595 mm.

[0351] Table 3 shows the basic structural parameters of the optical lens of Example 3, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0352] Table 3

[0353] Example 4

[0354] FIG4 is a schematic diagram of the optical lens structure of Example 4.

[0355] As shown in FIG4 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0356] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0357] In this example, the total effective focal length F of the optical lens is 16.047 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 28.863 mm.

[0358] Table 4 shows the basic structural parameters of the optical lens of Example 4, wherein the units of the curvature radius and thickness / distance are both millimeters (mm).

[0359] Table 4

[0360] Example 5

[0361] FIG5 is a schematic diagram of the optical lens structure of Example 5.

[0362] As shown in FIG5 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0363] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0364] In this example, the total effective focal length F of the optical lens is 15.982 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 30.965 mm.

[0365] Table 5 shows the basic structural parameters of the optical lens of Example 5, wherein the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0366] Table 5

[0367] Example 6

[0368] FIG6 is a schematic diagram of the optical lens structure of Example 6.

[0369] As shown in FIG6 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0370] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0371] In this example, the total effective focal length F of the optical lens is 15.967 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 29.767 mm.

[0372] Table 6 shows the basic structural parameters of the optical lens of Example 6, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0373] Table 6

[0374] Example 7

[0375] FIG7 is a schematic diagram of the optical lens structure of Example 7.

[0376] As shown in FIG7 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0377] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being concave. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0378] In this example, the total effective focal length F of the optical lens is 15.982 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 32.642 mm.

[0379] Table 7 shows the basic structural parameters of the optical lens of Example 7, wherein the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0380] Table 7

[0381] Example 8

[0382] FIG8 is a schematic diagram of the optical lens structure of Example 8.

[0383] As shown in FIG8 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0384] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being concave. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0385] In this example, the total effective focal length F of the optical lens is 15.980 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 29.876 mm.

[0386] Table 8 shows the basic structural parameters of the optical lens of Example 8, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0387] Table 8

[0388] Example 9

[0389] FIG9 is a schematic diagram of the optical lens structure of Example 9.

[0390] As shown in FIG9 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0391] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being concave. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0392] In this example, the total effective focal length F of the optical lens is 15.999 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 29.094 mm.

[0393] Table 9 shows the basic structural parameters of the optical lens of Example 9, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0394] Table 9

[0395] Example 10

[0396] FIG10 is a schematic diagram of the optical lens structure of Example 10.

[0397] As shown in FIG10 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0398] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has positive optical power, with its first side surface S8 being convex and its second side surface S9 being convex. The fifth lens L5 has negative optical power, with its first side surface S9 being concave and its second side surface S10 being concave. The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0399] In this example, the total effective focal length F of the optical lens is 15.999 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 26.951 mm.

[0400] Table 10 shows the basic structural parameters of the optical lens of Example 10, where the units of curvature radius Radius and thickness / distance are both millimeters (mm).

[0401] Table 10

[0402] Example 11

[0403] FIG11 is a schematic diagram of the optical lens structure of Example 11.

[0404] As shown in FIG11 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0405] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0406] In this example, the total effective focal length F of the optical lens is 15.999 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 28.240 mm.

[0407] Table 11 shows the basic structural parameters of the optical lens of Example 11, where the units of curvature radius Radius and thickness / distance are all millimeters (mm).

[0408] Table 11

[0409] Example 12

[0410] FIG12 is a schematic diagram of the optical lens structure of Example 12.

[0411] As shown in FIG12 , the optical lens includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a first side surface S13 of the color filter, a second side surface S14 of the color filter, a first side surface S15 of the protective glass, a second side surface S16 of the protective glass, and an imaging surface IMA.

[0412] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being convex and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S8 being convex and its second side surface S9 being concave. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being concave. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. Light from the first side sequentially passes through surfaces S1 to S16 and is ultimately imaged on the imaging plane IMA. Since the fourth lens L4 and the fifth lens L5 are cemented to form a doublet lens, the second side surface S9 of the fourth lens and the first side surface S9 of the fifth lens are the same surface.

[0413] In this example, the total effective focal length F of the optical lens is 15.999 mm, the maximum field of view FOV of the optical lens is 32.080°, and the total length TTL of the optical lens is 27.532 mm.

[0414] Table 12 shows the basic structural parameters of the optical lens of Example 12, where the units of the curvature radius Radius and thickness / distance are both millimeters (mm).

[0415] Table 12

[0416] In summary, Examples 1 to 12 respectively satisfy the relationships shown in Table 13.

[0417] Table 13

[0418] Table 14 shows the effective focal length F of the optical lenses of Examples 1 to 12, the effective focal length F1 to F6 of each lens, etc. (unit: mm).

[0419] Table 14

[0420] Technical Solution 2

[0421] The present application provides an optical lens and an electronic device to address at least one of the following issues with existing optical lenses: low light throughput, the inability to achieve both high resolution and small aperture, miniaturization limiting lens design, resulting in high sensitivity and an inability to achieve a good balance between aberrations.

[0422] Example 3

[0423] As shown in Figures 13 to 24, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens. The first lens has positive optical power, and the first side surface of the first lens is convex; the second lens has optical power, and the first side surface of the second lens and the second side surface of the second lens are opposite in shape; the third lens has positive optical power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex; the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fifth lens has positive optical power, and the second side surface of the fifth lens is convex; the sixth lens has optical power, and the first side surface of the sixth lens is convex; the seventh lens has optical power; the eighth lens has negative optical power, and the second side surface of the eighth lens is concave.

[0424] Optionally, the first lens has positive focal power, which converges light. Convex surfaces on the first side of the first lens facilitate collecting light over a wide area, allowing a large amount of light to enter the optical lens, thereby improving the optical lens's light throughput and illumination. Concave surfaces on the second side of the first lens facilitate reducing the size of the first lens to meet processing requirements while also reducing costs. Furthermore, the concave surface's control of light makes it less sensitive to light transitioning to the rear, thereby improving image resolution. Using a high-refractive-index material for the first lens facilitates the convergence of front-end light, thereby reducing the front port diameter.

[0425] Optionally, the first lens has positive power, and both the first and second side surfaces of the first lens are convex. This helps to further converge the light passing through the first lens when it exits from the second side surface of the first lens, thereby limiting the height of the light and thus compressing the aperture of the optical lens, thereby facilitating a small-aperture, miniaturized design. Furthermore, the use of spherical glass for the first lens allows for the addition of a waterproof coating while reducing processing costs.

[0426] Optionally, the second lens has negative optical power, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to have negative optical power and a convex first side of the second lens facilitates a smooth transition of front-end light, while the concave second side of the second lens allows the light focused on the first side to be released and fill the entrance pupil as much as possible, thereby improving the illumination of the target surface.

[0427] Optionally, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens is configured with negative optical power, and the first side surface of the second lens is designed to be concave to cooperate with the convex second side surface of the first lens, thereby smoothing the light flow. The second side surface of the second lens is configured to be convex to perfectly receive the light, thereby reducing the sensitivity of the optical lens.

[0428] Optionally, the second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens has positive optical power and is a meniscus shaped convex toward the first side, so that the second lens compresses light, reduces the rear port diameter, and achieves miniaturization.

[0429] Optionally, the third lens has positive power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens is designed to have positive power and the first side surface of the third lens is concave to better receive light passing through the aperture, leaving sufficient space for the aberration adjustment of the light in the rear optical system, while the second side surface of the third lens is designed to be convex to ensure that the third lens and the fourth lens have similar light paths, reduce light energy loss caused by reflection between lenses, improve relative illumination, and reduce field curvature to correct off-axis aberrations.

[0430] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fourth lens adopts negative optical power and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens, and the second side surface of the fourth lens is designed to be convex to change the direction of the light. At the same time, the fourth lens serves as a negative film of the cemented part, and its material properties also play a crucial role in correcting aberrations such as chromatic aberration.

[0431] Optionally, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The fifth lens adopts positive optical power and the first side surface is convex, which can collect light from the front optical system and limit the diameter of the rear port. As the fifth lens is an important lens connecting the front lens group and the rear lens group, the reduced diameter can reduce the influence of large aberrations caused by light from the edge of the field of view, thereby improving the sensitivity and optical performance of the optical lens. The second side surface of the fifth lens is designed to be convex, so that the size of the rear port diameter is optimized. At the same time, the convex surface design also maintains the sensitivity of the light transmitted from the first side, which is conducive to reducing sensitivity.

[0432] Optionally, the fifth lens has positive optical power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. The fifth lens has positive optical power, and the first side surface of the fifth lens is concave to receive the outgoing upward light, thereby maintaining a consistent light path through the fifth lens and optimizing the sensitivity of the fifth lens. The second side surface of the fifth lens is convex, altering the light path and ensuring a smooth transition to the rear.

[0433] Optionally, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have negative optical power, the first side surface of the sixth lens is convex to converge the front light, and the second side surface of the sixth lens is concave to diverge the light, thereby increasing the luminous flux and improving the imaging effect in dark environments.

[0434] Optionally, the sixth lens element has positive optical power, and the first side surface of the sixth lens element is convex, and the second side surface of the sixth lens element is convex. Setting the sixth lens element to have positive optical power and designing the first side surface of the sixth lens element to be convex is symmetrical with the convex surface of the second side surface of the fourth lens element, thereby balancing aberrations. Designing the second side surface of the sixth lens element to be convex further converges light rays toward the center of the image, thereby reducing the diameter of the back port.

[0435] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have positive power converges light, with the first side surface of the sixth lens being convex to receive front light, and the second side surface of the sixth lens being concave to serve as a transition, smoothing the path of light entering the seventh lens and improving the resolution of the optical lens.

[0436] Optionally, the seventh lens element has positive optical power, a first side surface of the seventh lens element is convex, and a second side surface of the seventh lens element is convex. By designing the seventh lens element to have positive optical power and adopting a biconvex structure, it is beneficial to further focus the front light, allowing the light to smoothly enter the rear optical system, thereby achieving a small aperture.

[0437] Optionally, the seventh lens element has negative optical power, a first side surface of the seventh lens element is concave, and a second side surface of the seventh lens element is convex. By designing the seventh lens element to have negative optical power and a meniscus-shaped structure convex toward the second side, the seventh lens element can receive light emitted by the sixth lens element and help diffuse the light outward, thereby expanding the imaging range.

[0438] Optionally, the seventh lens element has negative power, with a first side surface of the seventh lens element being concave, and a second side surface of the seventh lens element being concave. By designing the seventh lens element to have negative power and a biconcave structure, combined with the biconvex sixth lens element, not only is there no loss of transitional light, but the combination of positive and negative power also facilitates correction of aberrations between peripheral and central rays, achieving high resolution.

[0439] Optionally, the seventh lens element has negative optical power, the first side surface of the seventh lens element is convex, and the second side surface of the seventh lens element is concave. Setting the seventh lens element to have negative optical power, the first side surface of the seventh lens element is convex to gather light, and the second side surface of the seventh lens element is concave to diverge light, facilitates the subsequent rapid accumulation of light on the image plane, and expands the imaging range.

[0440] Optionally, the eighth lens element has negative power, and the first and second side surfaces of the eighth lens element are concave. Designing the eighth lens element with negative power and a concave first side surface facilitates collecting light entering through the seventh lens element, while the concave second side surface can regulate peripheral light aberrations to improve the resolution of the optical lens.

[0441] Optionally, the eighth lens element has negative optical power, the first side surface of the eighth lens element is convex, and the second side surface of the eighth lens element is concave. Designing the eighth lens element with negative optical power can further diverge light, designing the first side surface as a convex surface can facilitate receiving incident light from the seventh lens element, and designing the second side surface as a concave surface can facilitate increasing light flux and improving the imaging quality of the optical lens element in dark environments.

[0442] In this embodiment, the optical lens further includes an aperture, which is located between the second lens and the third lens. The aperture is positioned between the second lens and the third lens to converge light entering the optical lens, thereby reducing the aperture of the optical system behind the optical lens and lowering the assembly sensitivity of the optical lens.

[0443] In this embodiment, the third and fourth lenses are cemented together, and the sixth and seventh lenses are cemented together. Arranging the third and fourth lenses, which have opposite optical powers, as a cemented lens facilitates a smooth transition of light into the rear optical system. The sixth and seventh lenses as a cemented lens allow for a smooth transition of light from the front lens into the rear optical system, reducing the overall optical length of the optical lens and fully correcting various aberrations. This improves the resolution of the optical lens, while optimizing distortion, CRA, and other optical properties while maintaining a compact structure.

[0444] Designing the third and fourth lenses, as well as the sixth and seventh lenses, as cemented lenses reduces the air gap between them, shortening the overall length of the optical lens and facilitating miniaturization. This also reduces the number of components required to assemble the two lenses, simplifying the process and lowering costs. The complementary dispersion of the two lenses helps minimize chromatic aberration, further reducing field curvature and correcting off-axis aberrations, improving image quality. Properly allocating focal lengths facilitates thermal compensation and achieves excellent temperature performance.

[0445] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens element satisfies the following relationship with the overall focal length F of the optical lens: R15 / F ≥ 0.3. When the overall focal length F of the optical lens element is fixed, ensuring a positive radius of curvature of the second side surface of the eighth lens element effectively adjusts rearward light, balances aberrations, and improves the resolution of the optical lens element. Preferably, R15 / F ≥ 0.5.

[0446] In this embodiment, the sum of the center thicknesses d67 of the sixth and seventh lenses and the total length (TTL) of the optical lens satisfy the following relationship: d67 / TTL ≤ 0.3. When the TTLs are similar, a smaller sum of the center thicknesses of the sixth and seventh lenses increases the limiting effect on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture. This limiting of the center thickness of the cemented lens also plays an important role in maintaining low costs. Preferably, d67 / TTL ≤ 0.26.

[0447] In this embodiment, the focal length F of the optical lens, the arc value θ of the optical lens' maximum field of view, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view satisfy the following relationship: (F*θ) / D ≥ 0.3. For a given field of view, a smaller maximum clear aperture of the first side surface of the first lens facilitates a reduction in the front aperture and, consequently, in the size of the optical lens. Preferably, (F*θ) / D ≥ 0.5.

[0448] In this embodiment, the focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV × F) / H ≥ 45. This arrangement facilitates achieving long-focus, high-angle resolution while maintaining the same image height. Preferably, (FOV × F) / H ≥ 50.

[0449] In this embodiment, the total length TTL of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: TTL / F ≤ 3. When the focal lengths are close, a smaller TTL means a smaller optical lens, which facilitates miniaturization of the optical lens. Preferably, TTL / F ≤ 2.5.

[0450] In this embodiment, the focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.5. For the same imaging plane and image height, this effectively limits the length of the optical lens, facilitating miniaturization. TTL / H / FOV ≤ 0.3.

[0451] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.5 ≤ F / H ≤ 3. Keeping the ratio of the focal length to the image height within a reasonable range helps improve the resolution of the optical lens. Preferably, 1 ≤ F / H ≤ 2.5.

[0452] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective optical aperture D of the first side surface of the first lens corresponding to the maximum field of view angle, and the maximum effective optical aperture D2 of the second side surface of the first lens corresponding to the maximum field of view angle satisfy the following relationship: -1 ≤ (R1 / D) / (R2 / D2) ≤ 1. By limiting the curvature of the first lens and the maximum effective optical aperture to ensure that the above relationship is within a certain range, the height of the marginal light entering the optical lens can be effectively limited, further achieving a small aperture. Preferably, -0.5 ≤ (R1 / D) / (R2 / D2) ≤ 0.7.

[0453] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens element and the radius of curvature R10 of the second side surface of the fifth lens element satisfy the following relationship: -6.5 ≤ R9 / R10 ≤ 7. Controlling the radius of curvature of the fifth lens element within a reasonable range can reduce the deviation in the incident angles of light rays from different fields of view, facilitating a smooth transition of light rays, thereby reducing the sensitivity of the optical lens. Preferably, -4 ≤ R9 / R10 ≤ 6.5.

[0454] In this embodiment, the optical lens's focal length F, the arc value θ of the optical lens's maximum field of view angle, and the image height H corresponding to the optical lens's maximum field of view angle satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.05. This ensures that, while the field of view angle and image plane size remain unchanged, the focal length of the optical lens is increased, the imaging effect in the central area of ​​the optical lens's imaging plane is emphasized, and the effects of target surface distortion are reduced. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0455] In this embodiment, the optical lens's focal length (F) and its entrance pupil diameter (ENPD) satisfy the following relationship: F / ENPD ≤ 2. This configuration increases the entrance pupil diameter, thereby increasing light throughput, improving relative illumination, and enhancing imaging capabilities in dark environments. Preferably, F / ENPD ≤ 1.8.

[0456] In this embodiment, the maximum clear aperture D of the first side surface of the first lens element at the maximum field of view, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / F ≤ 0.2. With the overall focal length of the optical lens fixed, the optical lens exhibits the characteristics of a large target area and a small aperture. Preferably, D / H / F ≤ 0.15.

[0457] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the maximum effective optical aperture D9 of the first side surface of the fifth lens element corresponding to the maximum field of view satisfy the following relationship: R10 / D9 ≥ -7. Properly setting the ratio of the radius of curvature of the fifth lens element to the maximum effective optical aperture helps reduce the height of light entering the fifth lens element, achieving a small aperture while also ensuring lens manufacturability. Preferably, R10 / D9 ≥ -4.

[0458] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element satisfies the following relationship with the overall focal length F of the optical lens set: R10 / F ≥ -3.5. When the focal length is fixed, controlling the radius of curvature of the second side surface of the fifth lens element effectively reduces the height of the optical front and the aperture of the subsequent optical system. Preferably, R10 / F ≥ -2.5.

[0459] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens element satisfies the following relationship with the total optical length TTL of the optical lens: R15 / TTL > 0.001. While maintaining the total optical length, controlling the radius of curvature of the second side surface of the eighth lens element can reduce ghost images generated between the eighth lens element and the optical filter and cover glass, thereby improving image quality. Preferably, R15 / TTL ≥ 0.2.

[0460] In this embodiment, the optical back focus (BFL) of the optical lens and the overall focal length (F) of the optical lens satisfy the following relationship: BFL / F ≤ 0.54. By limiting the ratio of BFL to F, miniaturization is achieved while limiting the back focus length, thereby reducing the optical path difference between peripheral and central rays, thereby reducing aberrations and improving resolution. Preferably, BFL / F ≤ 0.41.

[0461] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens element satisfies the following relationship with the optical back focus of the optical lens: R15 / BFL ≥ 0.5. Ghost images are easily generated between the second side surface of the eighth lens element and the optical filter or cover glass. Making the second side surface of the eighth lens concave can effectively reduce or even prevent ghost images. By controlling the optical back focus, the resolving power of the optical lens can be significantly improved. Preferably, R15 / BFL ≥ 2.

[0462] Example 4

[0463] As shown in Figures 13 to 24, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The first lens has positive focal power; the second lens has optical power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power; the sixth lens has optical power; the seventh lens has optical power; and the eighth lens has negative focal power. The radius of curvature R15 of the second side surface of the eighth lens satisfies the following relationship with the focal length F of the entire optical lens group: R15 / F ≥ 0.3. When the focal length F of the entire optical lens group is fixed, ensuring that the radius of curvature of the second side surface of the eighth lens is positive can effectively adjust the rear light, balance aberrations, and improve the resolution of the optical lens. Preferably, R15 / F ≥ 0.5.

[0464] Optionally, the first lens has positive focal power, which converges light. Convex surfaces on the first side of the first lens facilitate collecting light over a wide area, allowing a large amount of light to enter the optical lens, thereby improving the optical lens's light throughput and illumination. Concave surfaces on the second side of the first lens facilitate reducing the size of the first lens to meet processing requirements while also reducing costs. Furthermore, the concave surface's control of light makes it less sensitive to light transitioning to the rear, thereby improving image resolution. Using a high-refractive-index material for the first lens facilitates the convergence of front-end light, thereby reducing the front port diameter.

[0465] Optionally, the first lens has positive power, and both the first and second side surfaces of the first lens are convex. This helps to further converge the light passing through the first lens when it exits from the second side surface of the first lens, thereby limiting the height of the light and thus compressing the aperture of the optical lens, thereby facilitating a small-aperture, miniaturized design. Furthermore, the use of spherical glass for the first lens allows for the addition of a waterproof coating while reducing processing costs.

[0466] Optionally, the second lens has negative optical power, the first side of the second lens is convex, and the second side of the second lens is concave. Setting the second lens to have negative optical power and a convex first side of the second lens facilitates a smooth transition of front-end light, while the concave second side of the second lens allows the light focused on the first side to be released and fill the entrance pupil as much as possible, thereby improving the illumination of the target surface.

[0467] Optionally, the second lens has negative optical power, the first side surface of the second lens is concave, and the second side surface of the second lens is convex. The second lens is configured with negative optical power, and the first side surface of the second lens is designed to be concave to cooperate with the convex second side surface of the first lens, thereby smoothing the light flow. The second side surface of the second lens is configured to be convex to perfectly receive the light, thereby reducing the sensitivity of the optical lens.

[0468] Optionally, the second lens has positive optical power, the first side surface of the second lens is convex, and the second side surface of the second lens is concave. The second lens has positive optical power and is a meniscus shaped convex toward the first side, so that the second lens compresses light, reduces the rear port diameter, and achieves miniaturization.

[0469] Optionally, the third lens has positive power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex. The third lens is designed to have positive power and the first side surface of the third lens is concave to better receive light passing through the aperture, leaving sufficient space for the aberration adjustment of the light in the rear optical system, while the second side surface of the third lens is designed to be convex to ensure that the third lens and the fourth lens have similar light paths, reduce light energy loss caused by reflection between lenses, improve relative illumination, and reduce field curvature to correct off-axis aberrations.

[0470] Optionally, the fourth lens has negative optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; the fourth lens adopts negative optical power and the first side surface of the fourth lens is concave in order to better receive the light incident through the third lens, and the second side surface of the fourth lens is designed to be convex to change the direction of the light. At the same time, the fourth lens serves as a negative film of the cemented part, and its material properties also play a crucial role in correcting aberrations such as chromatic aberration.

[0471] Optionally, the fifth lens has positive optical power, and the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex. The fifth lens adopts positive optical power and the first side surface is convex, which can collect light from the front optical system and limit the diameter of the rear port. As the fifth lens is an important lens connecting the front lens group and the rear lens group, the reduced diameter can reduce the influence of large aberrations caused by light from the edge of the field of view, thereby improving the sensitivity and optical performance of the optical lens. The second side surface of the fifth lens is designed to be convex, so that the size of the rear port diameter is optimized. At the same time, the convex surface design also maintains the sensitivity of the light transmitted from the first side, which is conducive to reducing sensitivity.

[0472] Optionally, the fifth lens has positive optical power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex. The fifth lens has positive optical power, and the first side surface of the fifth lens is concave to receive the outgoing upward light, thereby maintaining a consistent light path through the fifth lens and optimizing the sensitivity of the fifth lens. The second side surface of the fifth lens is convex, altering the light path and ensuring a smooth transition to the rear.

[0473] Optionally, the sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have negative optical power, the first side surface of the sixth lens is convex to converge the front light, and the second side surface of the sixth lens is concave to diverge the light, thereby increasing the luminous flux and improving the imaging effect in dark environments.

[0474] Optionally, the sixth lens element has positive optical power, and the first side surface of the sixth lens element is convex, and the second side surface of the sixth lens element is convex. Setting the sixth lens element to have positive optical power and designing the first side surface of the sixth lens element to be convex is symmetrical with the convex surface of the second side surface of the fourth lens element, thereby balancing aberrations. Designing the second side surface of the sixth lens element to be convex further converges light rays toward the center of the image, thereby reducing the diameter of the back port.

[0475] Optionally, the sixth lens has positive power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave. Setting the sixth lens to have positive power converges light, with the first side surface of the sixth lens being convex to receive front light, and the second side surface of the sixth lens being concave to serve as a transition, smoothing the path of light entering the seventh lens and improving the resolution of the optical lens.

[0476] Optionally, the seventh lens element has positive optical power, a first side surface of the seventh lens element is convex, and a second side surface of the seventh lens element is convex. By designing the seventh lens element to have positive optical power and adopting a biconvex structure, it is beneficial to further focus the front light, allowing the light to smoothly enter the rear optical system, thereby achieving a small aperture.

[0477] Optionally, the seventh lens element has negative optical power, a first side surface of the seventh lens element is concave, and a second side surface of the seventh lens element is convex. By designing the seventh lens element to have negative optical power and a meniscus-shaped structure convex toward the second side, the seventh lens element can receive light emitted by the sixth lens element and help diffuse the light outward, thereby expanding the imaging range.

[0478] Optionally, the seventh lens element has negative power, with a first side surface of the seventh lens element being concave, and a second side surface of the seventh lens element being concave. By designing the seventh lens element to have negative power and a biconcave structure, combined with the biconvex sixth lens element, not only is there no loss of transitional light, but the combination of positive and negative power also facilitates correction of aberrations between peripheral and central rays, achieving high resolution.

[0479] Optionally, the seventh lens element has negative optical power, the first side surface of the seventh lens element is convex, and the second side surface of the seventh lens element is concave. Setting the seventh lens element to have negative optical power, the first side surface of the seventh lens element is convex to gather light, and the second side surface of the seventh lens element is concave to diverge light, facilitates the subsequent rapid accumulation of light on the image plane, and expands the imaging range.

[0480] Optionally, the eighth lens element has negative power, and the first and second side surfaces of the eighth lens element are concave. Designing the eighth lens element with negative power and a concave first side surface facilitates collecting light entering through the seventh lens element, while the concave second side surface can regulate peripheral light aberrations to improve the resolution of the optical lens.

[0481] Optionally, the eighth lens element has negative optical power, the first side surface of the eighth lens element is convex, and the second side surface of the eighth lens element is concave. Designing the eighth lens element with negative optical power can further diverge light, designing the first side surface as a convex surface can facilitate receiving incident light from the seventh lens element, and designing the second side surface as a concave surface can facilitate increasing light flux and improving the imaging quality of the optical lens element in dark environments.

[0482] In this embodiment, the optical lens further includes an aperture, which is located between the second lens and the third lens. The aperture is positioned between the second lens and the third lens to converge light entering the optical lens, thereby reducing the aperture of the optical system behind the optical lens and lowering the assembly sensitivity of the optical lens.

[0483] In this embodiment, the third and fourth lenses are cemented together, and the sixth and seventh lenses are cemented together. Arranging the third and fourth lenses, which have opposite optical powers, as a cemented lens facilitates a smooth transition of light into the rear optical system. The sixth and seventh lenses as a cemented lens allow for a smooth transition of light from the front lens into the rear optical system, reducing the overall optical length of the optical lens and fully correcting various aberrations. This improves the resolution of the optical lens, while optimizing distortion, CRA, and other optical properties while maintaining a compact structure.

[0484] Designing the third and fourth lenses, as well as the sixth and seventh lenses, as cemented lenses reduces the air gap between them, shortening the overall length of the optical lens and facilitating miniaturization. This also reduces the number of components required to assemble the two lenses, simplifying the process and lowering costs. The complementary dispersion of the two lenses helps minimize chromatic aberration, further reducing field curvature and correcting off-axis aberrations, improving image quality. Properly allocating focal lengths facilitates thermal compensation and achieves excellent temperature performance.

[0485] In this embodiment, the sum of the center thicknesses d67 of the sixth and seventh lenses and the total length (TTL) of the optical lens satisfy the following relationship: d67 / TTL ≤ 0.3. When the TTLs are similar, a smaller sum of the center thicknesses of the sixth and seventh lenses increases the limiting effect on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture. This limiting of the center thickness of the cemented lens also plays an important role in maintaining low costs. Preferably, d67 / TTL ≤ 0.26.

[0486] In this embodiment, the focal length F of the optical lens, the arc value θ of the optical lens' maximum field of view, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view satisfy the following relationship: (F*θ) / D ≥ 0.3. For a given field of view, a smaller maximum clear aperture of the first side surface of the first lens facilitates a reduction in the front aperture and, consequently, in the size of the optical lens. Preferably, (F*θ) / D ≥ 0.5.

[0487] In this embodiment, the focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV × F) / H ≥ 45. This arrangement facilitates achieving long-focus, high-angle resolution while maintaining the same image height. Preferably, (FOV × F) / H ≥ 50.

[0488] In this embodiment, the total length TTL of the optical lens and the focal length F of the entire optical lens group satisfy the following relationship: TTL / F ≤ 3. When the focal lengths are close, a smaller TTL means a smaller optical lens, which facilitates miniaturization of the optical lens. Preferably, TTL / F ≤ 2.5.

[0489] In this embodiment, the focal length F of the optical lens, the maximum field of view (FOV) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.5. For the same imaging plane and image height, this effectively limits the length of the optical lens, facilitating miniaturization. TTL / H / FOV ≤ 0.3.

[0490] In this embodiment, the focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.5 ≤ F / H ≤ 3. Keeping the ratio of the focal length to the image height within a reasonable range helps improve the resolution of the optical lens. Preferably, 1 ≤ F / H ≤ 2.5.

[0491] In this embodiment, the radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective optical aperture D of the first side surface of the first lens corresponding to the maximum field of view angle, and the maximum effective optical aperture D2 of the second side surface of the first lens corresponding to the maximum field of view angle satisfy the following relationship: -1 ≤ (R1 / D) / (R2 / D2) ≤ 1. By limiting the curvature of the first lens and the maximum effective optical aperture to ensure that the above relationship is within a certain range, the height of the marginal light entering the optical lens can be effectively limited, further achieving a small aperture. Preferably, -0.5 ≤ (R1 / D) / (R2 / D2) ≤ 0.7.

[0492] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens element and the radius of curvature R10 of the second side surface of the fifth lens element satisfy the following relationship: -6.5 ≤ R9 / R10 ≤ 7. Controlling the radius of curvature of the fifth lens element within a reasonable range can reduce the deviation in the incident angles of light rays from different fields of view, facilitating a smooth transition of light rays, thereby reducing the sensitivity of the optical lens. Preferably, -4 ≤ R9 / R10 ≤ 6.5.

[0493] In this embodiment, the optical lens's focal length F, the arc value θ of the optical lens's maximum field of view angle, and the image height H corresponding to the optical lens's maximum field of view angle satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.05. This ensures that, while the field of view angle and image plane size remain unchanged, the focal length of the optical lens is increased, the imaging effect in the central area of ​​the optical lens's imaging plane is emphasized, and the effects of target surface distortion are reduced. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0494] In this embodiment, the optical lens's overall focal length (F) and its entrance pupil diameter (ENPD) satisfy the following relationship: F / ENPD ≤ 2. With the overall focal length fixed, the optical lens exhibits a large target area and a small aperture. Preferably, D / H / F ≤ 0.15.

[0495] In this embodiment, the maximum clear aperture D of the first side surface of the first lens element at the maximum field of view, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / F ≤ 0.2. With the overall focal length of the optical lens fixed, the optical lens exhibits the characteristics of a large target area and a small aperture. Preferably, D / H / F ≤ 0.15.

[0496] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element and the maximum effective optical aperture D9 of the first side surface of the fifth lens element corresponding to the maximum field of view satisfy the following relationship: R10 / D9 ≥ -7. Properly setting the ratio of the radius of curvature of the fifth lens element to the maximum effective optical aperture helps reduce the height of light entering the fifth lens element, achieving a small aperture while also ensuring lens manufacturability. Preferably, R10 / D9 ≥ -4.

[0497] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens element satisfies the following relationship with the overall focal length F of the optical lens set: R10 / F ≥ -3.5. When the focal length is fixed, controlling the radius of curvature of the second side surface of the fifth lens element effectively reduces the height of the optical front and the aperture of the subsequent optical system. Preferably, R10 / F ≥ -2.5.

[0498] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens element satisfies the following relationship with the total optical length TTL of the optical lens: R15 / TTL > 0.001. While maintaining the total optical length, controlling the radius of curvature of the second side surface of the eighth lens element can reduce ghost images generated between the eighth lens element and the optical filter and cover glass, thereby improving image quality. Preferably, R15 / TTL ≥ 0.2.

[0499] In this embodiment, the optical back focus (BFL) of the optical lens and the overall focal length (F) of the optical lens satisfy the following relationship: BFL / F ≤ 0.54. By limiting the ratio of BFL to F, miniaturization is achieved while limiting the back focus length, thereby reducing the optical path difference between peripheral and central rays, thereby reducing aberrations and improving resolution. Preferably, BFL / F ≤ 0.41.

[0500] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens element satisfies the following relationship with the optical back focus of the optical lens: R15 / BFL ≥ 0.5. Ghost images are easily generated between the second side surface of the eighth lens element and the optical filter or cover glass. Making the second side surface of the eighth lens concave can effectively reduce or even prevent ghost images. By controlling the optical back focus, the resolving power of the optical lens can be significantly improved. Preferably, R15 / BFL ≥ 2.

[0501] Optionally, the optical lens may further include a filter for correcting color deviation and a protective glass for protecting a photosensitive element located on the imaging surface.

[0502] In the above optical lenses, the maximum field of view (FOV) of the optical lens is related to H, and the field of view corresponding to the image height is used. The total optical length (TTL) of the optical lens refers to the distance from the first side surface of the first lens to the imaging surface of the optical lens on the optical axis.

[0503] The optical lens in the present application may adopt multiple lenses, such as the eight lenses mentioned above. In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, aspherical lenses can be used for the first lens to the eighth lens.

[0504] In an exemplary embodiment, the first through eighth lenses may all be glass lenses. Optical lenses made of glass can suppress the shift in back focus due to temperature changes, thereby improving system stability. Furthermore, the use of glass can prevent blurring caused by high and low temperature fluctuations in the operating environment, which can affect the normal operation of the lens. For example, an all-glass optical lens has a wide temperature range and can maintain stable optical performance within a range of -40°C to 105°C.

[0505] Specifically, when resolution quality and reliability are of primary concern, the first through eighth lenses can all be glass aspheric lenses. Of course, in applications where temperature stability requirements are lower, the first through eighth lenses in the optical lens can all be made of plastic. Using plastic for optical lenses can effectively reduce production costs. Of course, the first through eighth lenses in the optical lens can also be made of a combination of plastic and glass.

[0506] The present application also provides an electronic device comprising the above-described optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS). The electronic device may be an independent imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. The electronic device is equipped with the above-described optical lens.

[0507] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens can be varied to achieve the various results and advantages described herein without departing from the technical solutions claimed herein. For example, although eight lenses are described as an example in the embodiments, the optical lens is not limited to eight lenses. If desired, the optical lens can also include other numbers of lenses.

[0508] The following further describes examples of specific surface shapes and parameters of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0509] Example 13

[0510] As shown in FIG13 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0511] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0512] In this example, the focal length F of the optical lens is 15.3688 mm, the total length TTL of the optical lens is 32.5552 mm, and the maximum field of view FOV of the optical lens is 34.3857°.

[0513] In this example, the third lens and the fourth lens are cemented lenses, so the second side surface of the third lens and the first side surface of the fourth lens are both S7. The sixth lens and the seventh lens are cemented lenses, so the second side surface of the sixth lens and the first side surface of the seventh lens are both S12. However, for the first and second side surfaces, while having the same radius of curvature, their surface shapes are different. Therefore, the second side surface S7 of the third lens is convex, and the first side surface S7 of the fourth lens is concave; the second side surface S12 of the sixth lens is convex, and the first side surface S12 of the seventh lens is concave.

[0514] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0515] Table 15 shows the basic structural parameters of the optical lens of Example 13, where the units of curvature radius and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0516] Table 15

[0517] Example 14

[0518] As shown in FIG14 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0519] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0520] In this example, the focal length F of the optical lens is 15.6134 mm, the total length TTL of the optical lens is 32.9843 mm, and the maximum field of view FOV of the optical lens is 34.2065°.

[0521] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0522] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0523] Table 16 shows the basic structural parameters of the optical lens of Example 14, where the units of curvature radius and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0524] Table 16

[0525] Example 15

[0526] As shown in FIG15 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0527] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has positive optical power, with its first side surface S12 being convex and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0528] In this example, the focal length F of the optical lens is 15.4469 mm, the total length TTL of the optical lens is 32.4494 mm, and the maximum field of view FOV of the optical lens is 34.4283°.

[0529] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0530] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0531] Table 17 shows the basic structural parameters of the optical lens of Example 15, where the units of curvature radius and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0532] Table 17

[0533] Example 16

[0534] As shown in FIG16 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0535] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has negative optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has positive optical power, with its first side surface S12 being convex and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0536] In this example, the focal length F of the optical lens is 15.4545 mm, the total length TTL of the optical lens is 32.3781 mm, and the maximum field of view FOV of the optical lens is 34.4446°.

[0537] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0538] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0539] Table 18 shows the basic structural parameters of the optical lens of Example 16, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0540] Table 18

[0541] Example 17

[0542] As shown in FIG17 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0543] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging surface IMA.

[0544] In this example, the focal length F of the optical lens is 15.3972 mm, the total length TTL of the optical lens is 32.5937 mm, and the maximum field of view FOV of the optical lens is 34.3828°.

[0545] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0546] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0547] Table 19 shows the basic structural parameters of the optical lens of Example 17, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0548] Table 19

[0549] Example 18

[0550] As shown in FIG18 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0551] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being convex. The second lens L2 has negative optical power, with its first side surface S3 being concave and its second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0552] In this example, the focal length F of the optical lens is 15.3928 mm, the total length TTL of the optical lens is 32.4082 mm, and the maximum field of view FOV of the optical lens is 34.3825°.

[0553] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0554] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0555] Table 20 shows the basic structural parameters of the optical lens of Example 18, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0556] Table 20

[0557] Example 19

[0558] As shown in FIG19 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0559] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0560] In this example, the focal length F of the optical lens is 15.6091 mm, the total length TTL of the optical lens is 32.6947 mm, and the maximum field of view FOV of the optical lens is 34.504°.

[0561] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0562] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0563] Table 21 shows the basic structural parameters of the optical lens of Example 19, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0564] Table 21

[0565] Example 20

[0566] As shown in FIG20 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0567] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being convex. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0568] In this example, the focal length F of the optical lens is 15.5795 mm, the total length TTL of the optical lens is 32.6957 mm, and the maximum field of view FOV of the optical lens is 34.5281°.

[0569] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0570] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0571] Table 22 shows the basic structural parameters of the optical lens of Example 20, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0572] Table 22

[0573] Example 21

[0574] As shown in FIG21 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0575] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has negative optical power, with its first side surface S12 being convex and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is convex, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging surface IMA.

[0576] In this example, the focal length F of the optical lens is 15.8227 mm, the total length TTL of the optical lens is 32.4859 mm, and the maximum field of view FOV of the optical lens is 34.7606°.

[0577] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0578] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0579] Table 23 shows the basic structural parameters of the optical lens of Example 21, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0580] Table 23

[0581] Example 22

[0582] As shown in FIG22 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0583] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being concave and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave. The seventh lens L7 has negative optical power, with its first side surface S12 being convex and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is convex, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging surface IMA.

[0584] In this example, the focal length F of the optical lens is 15.7761 mm, the total length TTL of the optical lens is 32.4613 mm, and the maximum field of view FOV of the optical lens is 34.7494°.

[0585] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0586] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0587] Table 24 shows the basic structural parameters of the optical lens of Example 22, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0588] Table 24

[0589] Example 23

[0590] As shown in FIG23 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0591] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0592] In this example, the focal length F of the optical lens is 15.4241 mm, the total length TTL of the optical lens is 32.5177 mm, and the maximum field of view FOV of the optical lens is 34.4236°.

[0593] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0594] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0595] Table 25 shows the basic structural parameters of the optical lens of Example 23, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0596] Table 25

[0597] Example 24

[0598] As shown in FIG24 , the optical lens system includes, from the first side to the second side, a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a filter, a protective glass, and an imaging surface IMA.

[0599] The first lens L1 has positive optical power, with its first side surface S1 being convex and its second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave. The third lens L3 has positive optical power, with its first side surface S6 being concave and its second side surface S7 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 being concave and its second side surface S8 being convex. The fifth lens L5 has positive optical power, with its first side surface S9 being convex and its second side surface S10 being convex. The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being convex. The seventh lens L7 has negative optical power, with its first side surface S12 being concave and its second side surface S13 being concave. The eighth lens L8 has negative power. Its first side surface S14 is concave, and its second side surface S15 is concave. The optical filter has a first side surface S16 and a second side surface S17. The cover glass has a first side surface S18 and a second side surface S19. Light from an object passes through surfaces S1 to S19 in sequence and is ultimately imaged on the imaging plane IMA.

[0600] In this example, the focal length F of the optical lens is 15.4144 mm, the total length TTL of the optical lens is 32.5676 mm, and the maximum field of view FOV of the optical lens is 34.4262°.

[0601] In this example, the third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

[0602] It should be noted that, the "i" in the curvature radius Ri of each lens refers to the surface number of the lens.

[0603] Table 26 shows the basic structural parameters of the optical lens of Example 24, where the units of radius of curvature and thickness / distance are all millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0604] Table 26

[0605] In summary, Examples 13 to 24 satisfy the relationship shown in Table 27.

[0606] Table 27

[0607] Table 28 gives the focal length value F (unit: mm) of the entire set of optical lenses of Examples 13 to 24.

[0608] Table 28

[0609] Technical Solution 3

[0610] Example 5

[0611] In this embodiment, the optical lens includes, for example, eight lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in sequence from the first side to the second side along the optical axis.

[0612] In this embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0613] In this embodiment, the optical lens may further include a filter disposed between the eighth lens and the imaging surface. The filter may filter light with a specific wavelength.

[0614] In this embodiment, the first lens may have positive focal power. The first lens may have a convex-concave surface type. The first lens has positive focal power, and the first side surface (object side) of the first lens is a convex surface, which has a convergent effect on light, and the first lens can be made of a high refractive index material, which is conducive to reducing the front port diameter and achieving miniaturization; the first side surface (object side) of the first lens is a convex surface, which is convenient for collecting light entering the optical system, which is conducive to improving the overall light throughput and illumination of the lens; the second side surface (image side) of the first lens is a concave surface, so that the light entering through the first side surface (object side) of the first lens is appropriately diverged, and further the light emitted through the image side of the first lens is smoothly transitioned to the rear lens, which is conducive to reducing the sensitivity of the first lens.

[0615] In this embodiment, the first lens may have positive optical power. The first lens may have a convex-convex surface. The first lens has positive optical power, and the first side surface (object side) is convex, which has a convergent effect on light. The first lens can be made of a high refractive index material, which is conducive to reducing the front port diameter and achieving miniaturization. The first lens has a biconvex structure, and the convex surface of the second side surface (image side) can further converge light, suppressing the light, and reducing the aperture of the second lens, which is conducive to reducing the front group diameter of the system and achieving miniaturization.

[0616] In this embodiment, the second lens element may have negative optical power. The second lens element may have a concave-concave surface. The second lens element has negative optical power and a biconcave structure, which diverges light and disperses the central and peripheral rays of each field of view. This allows the light to enter the third lens at a certain height. When used with the first lens element, which has positive optical power, this helps increase light throughput, increasing system illumination while reducing the front port diameter. Furthermore, the increased optical path length at the edge of the field of view facilitates clearer imaging of the peripheral and central rays, correcting aberrations such as field curvature and achieving high resolution.

[0617] In this embodiment, the third lens may have positive focal length. The third lens may have a convex-convex surface. The third lens has positive focal length, and the first side surface (object side surface) is designed to be convex, which can compress the height of the light incident through the second lens. The second side surface (image side surface) is designed to be convex, so that the light emitted through the third lens is further converged and smoothly enters the rear optical system, further making the light transition smoother, which is beneficial to reducing the front port diameter of the lens. In combination with the negative focal length of the second lens, it is beneficial to adjust the optical path difference between light rays in different fields of view and achieve high resolution. The second side surface (image side surface) of the third lens is convex, and the light rays are converged after passing through the third lens, so that as much light rays from the peripheral field of view as possible enter the rear system, which is beneficial to increase the overall light throughput and illumination improvement.

[0618] In this embodiment, the third lens element may have negative optical power. The third lens element may have a convex-concave surface. The design of a negative optical power third lens element with a convex first side surface (object side) facilitates appropriate compression of light convergence. Combined with a concave second side surface, this facilitates smooth light emission and transition, virtually eliminating deflection and improving image quality.

[0619] In this embodiment, the fourth lens element may have positive optical power and a convex-convex surface. The fourth lens element has positive optical power and a biconvex design. This, combined with the convex surface of the second side (image side) of the third lens element, ensures a smooth transition of light to the rear lens element, minimizing light deflection and reducing sensitivity. In this embodiment, the fourth lens element is cemented with the fifth lens element to further reduce field curvature and correct for off-axis aberrations in the system.

[0620] In this embodiment, the fourth lens element may have negative optical power and a concave-concave surface. A negative biconcave fourth lens element facilitates light divergence, dispersing the central and peripheral rays of each field of view, resulting in clear images of light from different fields of view. In this embodiment, the fourth lens element serves as the negative of the cemented element, facilitating chromatic aberration correction in conjunction with the positive third lens element.

[0621] In this embodiment, the fourth lens element may have negative optical power. It may have a convex-concave surface. The fourth lens element has negative optical power and diverges light. Its first side (object side) is convex, further converging the light exiting the third lens element. Its second side (image side) is concave, further releasing the light, ensuring a smooth transition to the rear lens element and reducing sensitivity. In this embodiment, the fourth lens element serves as the negative of the bonded element, cemented to the positive fifth lens element, playing a significant role in correcting chromatic aberration.

[0622] In this embodiment, the fifth lens element may have positive optical power. The fifth lens element may have a convex-convex surface. The fifth lens element has positive optical power and a convex second side surface (image side), which facilitates light convergence. This allows diverging light to enter the rear optical system smoothly, while also lowering the position at which light enters the subsequent optical system, reducing the rear port diameter.

[0623] In this embodiment, the fifth lens element may have negative optical power. The fifth lens element may have a concave-convex surface. The fifth lens element has negative optical power and a concave first side surface (object side) to better receive incident light from the fourth lens element. The convex second side surface (image side) mitigates light divergence, ensuring a smooth transition, reducing system sensitivity and improving resolution. This also facilitates reducing the aperture of the rear lens element and achieving miniaturization. In this embodiment, the negative optical power of the fifth lens element is bonded to the positive optical power of the fourth lens element to effectively correct chromatic aberration in the optical system and improve image quality.

[0624] In this embodiment, the sixth lens may have negative optical power. The sixth lens may have a convex-concave surface. The sixth lens is a negative optical power lens that has a divergent effect on light. By controlling the focal length of the sixth lens, the chromatic aberration caused by the positive lens in front can be effectively corrected, improving image quality. The first side surface (object side) of the sixth lens is a convex surface, which can further converge the light converging in front and smooth the overall light trend. The second side surface (image side) is a concave surface, and when used with a high refractive index material, the light tends to diverge, allowing peripheral light to reach a higher imaging position, which is conducive to the use of large chip sizes.

[0625] In this embodiment, the sixth lens element may have positive optical power. The sixth lens element may have a convex-convex surface. The sixth lens element has positive optical power, and its first side (object side) is convex, which can converge the front group of rays and limit the diameter of the back port, reducing the impact of large aberrations caused by light rays at the edge of the field of view, reducing system sensitivity, and improving optical performance. The design of a convex second side (image side) can also optimize the diameter of the back port.

[0626] In this embodiment, the seventh lens element may have positive optical power and a convex-convex surface. The positive optical power of the seventh lens element can converge light, controlling the angle at which marginal light enters the eighth lens element, and effectively controlling the CRA of the system. The biconvex design of the seventh lens element can converge front-end light, facilitating a small rear-end aperture and allowing light to reach the imaging plane as quickly as possible, shortening the overall length of the optical system. The seventh lens element with positive optical power, cemented to the sixth lens element with negative optical power, can correct aberrations and achieve high resolution.

[0627] In this embodiment, the seventh lens element may have negative refractive power and a concave-concave surface. The negative refractive power of the seventh lens element diverges light, moderately diverging the light rays converged at the front end, resulting in a smooth transition and minimal aberration. Furthermore, the negative refractive power of the seventh lens element, cemented with the positive refractive power of the sixth lens element, corrects aberrations and achieves high resolution.

[0628] In this embodiment, the seventh lens element may have negative optical power. The seventh lens element may have a concave-convex surface. The seventh lens element has negative optical power and a concave first side surface (object side), allowing it to better receive light emitted by the sixth lens element. The convex second side surface (image side) effectively converges and collects light, miniaturizing the back port diameter. The negative optical power of the seventh lens element, cemented to the positive optical power of the sixth lens element, corrects aberrations and achieves high resolution.

[0629] In this embodiment, the eighth lens element may have negative power. The eighth lens element may have a concave-concave surface. The negative power of the eighth lens element can balance the aberrations produced by the positive power lens element preceding it, achieving high resolution. It also diverges light from the central and peripheral fields of view, lengthening the back focus. The eighth lens element has a biconcave design, so light rays, after passing through the second side (image side) of the eighth lens element, tend to diverge upward, allowing for rapid accumulation of light rays at the image plane, thus expanding the imaging range.

[0630] In this embodiment, the eighth lens element may have negative power. The eighth lens element may have a concave-convex surface. The negative power of the eighth lens element can balance the aberrations produced by the positive power lens element in front, achieving high resolution. The negative power also helps diffuse light, expanding the imaging range. The first side (object side) of the eighth lens element is concave, collecting more light entering through the seventh lens element. The second side (image side) is convex, allowing the light to converge smoothly to the rear optical system, reducing light energy loss and improving system illumination.

[0631] In this embodiment, the sixth and seventh lenses can be cemented together to form a doublet. This cemented component smoothly transitions light from the front lens element to the rear optical system, reducing the overall lens length. This allows for full correction of various aberrations in the optical system, improving resolution while maintaining a compact structure and optimizing optical performance such as distortion and CRA.

[0632] In this embodiment, the third lens and the fourth lens can be cemented together to form a doublet lens. The third lens and the fourth lens have opposite optical powers, and the two lenses form a cemented component, which can ensure smooth transition of light to the rear lens.

[0633] In this embodiment, the fourth lens and the fifth lens can be cemented together to form a doublet lens. The fourth lens and the fifth lens have opposite optical powers, and the two lenses form a cemented component, which can ensure smooth transition of light to the rear lens.

[0634] The above-mentioned double-cemented lens also has the following advantages: it can reduce the air gap between the two lenses and shorten the total length of the system; the dispersion of the two lenses is complementary, which is conducive to reducing chromatic aberration and improving imaging quality; it can reduce the number of assembly components between the two lenses, reduce the number of processes, and reduce costs; it can further reduce the field curvature and correct the off-axis point aberration of the system; and the reasonable distribution of focal length is conducive to achieving thermal compensation and obtaining good temperature performance.

[0635] In this embodiment, the optical lens may further include an aperture disposed between the second and third lenses. Positioning the aperture between the second and third lenses facilitates effective convergence of light entering the optical system, reduces the aperture of the lens at the rear end of the optical system, and reduces the system's assembly sensitivity. However, it should be noted that the aperture position disclosed herein is merely illustrative and not limiting; in alternative embodiments, the aperture may be positioned elsewhere as needed.

[0636] In this embodiment, the optical lens according to the present application can satisfy: TTL / F≤3.5, wherein TTL is the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. By controlling the ratio of the distance from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis to the total effective focal length of the optical lens within this range, it is beneficial to achieve miniaturization of the lens. At the same focal length of the optical system, the smaller the TTL, the more conducive to miniaturization. More specifically, TTL and F can further satisfy: TTL / F≤3. Controlling the ratio of TTL to F within this range can better achieve miniaturization. TTL and F can also satisfy: TTL / F≤2.5 in one embodiment.

[0637] In this embodiment, the optical lens according to the present application can meet the requirement: F / ENPD ≤ 2, where F is the total effective focal length of the optical lens, and ENPD is the entrance pupil diameter of the optical lens. By controlling the ratio of the total effective focal length of the optical lens to the entrance pupil diameter of the optical lens within this range, it is beneficial to achieve a small FNO, increase the light passing amount, and a large entrance pupil diameter helps to improve the relative illumination. More specifically, F and ENPD can further meet the requirement: 1.4 ≤ F / ENPD ≤ 1.8. Controlling the ratio of F to ENPD within this range can further increase the light passing amount and is more beneficial to improving the relative illumination. In one further embodiment, F and ENPD can also meet the requirement: 1.5 ≤ F / ENPD ≤ 1.7.

[0638] In this embodiment, the optical lens according to the present application can meet the requirement: 0 < R3¹ / F ≤ 20, where R3¹ is the curvature radius of the first side surface of the third lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the first side surface of the third lens to the total effective focal length of the optical lens within this range, it is possible to compress the height of the light incident through the second lens, which is beneficial to reducing the front port diameter of the lens.

[0639] More specifically, R3¹ and F can further meet the requirement: 0.4 ≤ R3¹ / F ≤ 10. Controlling the ratio of R3¹ to F within this range can moderately converge the front light, further compress the light, and further reduce the diameter. In one further embodiment, R3¹ and F can also meet the requirement: 0.7 ≤ R3¹ / F ≤ 3.5.

[0640] In this embodiment, the optical lens according to the present application can meet the requirement: -20 ≤ R5² / F < 0, where R5² is the curvature radius of the second side surface of the fifth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the second side surface of the fifth lens to the total effective focal length of the optical lens within this range, and at the same time, the design that the second side surface (image side surface) of the fifth lens is convex is beneficial to converging the light of the front group of the system and restricting the rear port diameter, realizing the miniaturization of the rear port diameter. More specifically, R5² and F can further meet the requirement: -10 ≤ R5² / F ≤ -0.4. Controlling the ratio of R5² to F within this range can be more beneficial to restricting the rear port diameter and realizing the miniaturization of the rear port diameter. In one further embodiment, R5² and F can also meet the requirement: -5 ≤ R5² / F ≤ -0.8.

[0641] In this embodiment, the optical lens according to the present application can satisfy: 0 < R61 / F ≤ 20, where R61 is the curvature radius of the first side surface of the sixth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the first side surface of the sixth lens to the total effective focal length of the optical lens within this range, and at the same time, the design that the first side surface (object side surface) of the sixth lens is convex is beneficial to converging the front group of light rays of the system and restricting the rear aperture, realizing the miniaturization of the rear aperture. More specifically, R61 and F can further satisfy: 0.3 ≤ R61 / F ≤ 15. Controlling the ratio of R61 to F within this range can be more beneficial to restricting the rear aperture and realizing the miniaturization of the rear aperture. In one embodiment, R61 and F can further satisfy: 0.5 ≤ R61 / F ≤ 8. And in one embodiment, it can further satisfy: 0.7 ≤ R61 / F ≤ 3.5.

[0642] In this embodiment, the optical lens according to the present application can satisfy: -12 ≤ R21 / R22 < 0, where R21 is the curvature radius of the first side surface of the second lens, and R22 is the curvature radius of the second side surface of the second lens. The second lens is of a double concave type. By controlling the ratio of the curvature radius of the first side surface of the second lens to the curvature radius of the second side surface of the second lens within this range, it is beneficial to diverge light rays, enabling the light rays to enter the third lens at a certain height, improving the light passing amount. At the same time, it disperses the light rays of each field of view, improves the imaging quality of each field of view on the imaging surface, and takes into account the long focal length of the entire system. More specifically, R21 and R22 can further satisfy: -8 ≤ R21 / R22 ≤ -0.5. Controlling the ratio of R21 to R22 within this range can further improve the light passing amount, further improve the imaging quality of each field of view on the imaging surface, and better take into account the long focal length of the entire system. In one embodiment, R21 and R22 can further satisfy: -5 ≤ R21 / R22 ≤ -0.8.

[0643] In this embodiment, the optical lens according to the present application can satisfy: -12 ≤ R21 / F < 0, where R21 is the curvature radius of the first side surface of the second lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the curvature radius of the first side surface of the second lens to the total effective focal length of the optical lens within this range, it is beneficial for the light rays to diverge moderately when entering the first side surface (object side surface) of the second lens and enter the subsequent optical system gently.

[0644] More specifically, R21 and F can further satisfy: -8 ≤ R21 / F ≤ -0.35. Controlling the ratio of R21 to F within this range can also achieve the long focal length of the entire system. In one embodiment, R21 and F can further satisfy: -3.5 ≤ R21 / F ≤ -0.6.

[0645] In this embodiment, the optical lens according to the present application can satisfy: 0.02 ≤ d23 / TTL ≤ 0.4, where d23 is the air gap between the second lens and the third lens on the optical axis, that is, the distance on the optical axis from the center of the second side of the second lens to the center of the first side of the third lens; TTL is the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens. By controlling the ratio of the air gap between the second lens and the third lens on the optical axis to the distance on the optical axis from the center of the first side of the first lens to the imaging surface of the optical lens within this range, a relatively large air gap between the second lens and the third lens is controlled, which is beneficial for the light rays emitted from the second lens to diverge smoothly and then enter the third lens, and can expand the beam width to increase the light flux of the system.

[0646] More specifically, d23 and TTL can further satisfy: 0.035 ≤ d23 / TTL ≤ 0.25. Controlling the ratio of d23 to TTL within this range can also be beneficial for miniaturization advantages. In one embodiment, d23 and TTL can further satisfy: 0.045 ≤ d23 / TTL ≤ 0.18.

[0647] In this embodiment, the optical lens according to the present application can satisfy: -4 ≤ F2 / F. Where F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the second lens to the total effective focal length of the optical lens within this range, it is beneficial to increase the optical path of the marginal rays, and the central rays are relatively dispersed to form a clear image, while taking into account long focal length and small distortion.

[0648] More specifically, F2 and F can further satisfy: -2.5 ≤ F2 / F ≤ -0.3. Controlling the ratio of F2 to F within this range, combined with the first lens having a positive optical power, is beneficial for improving the light flux of the entire system. In one embodiment, F2 and F can further satisfy: -1.5 ≤ F2 / F ≤ -0.45.

[0649] In this embodiment, the optical lens according to the present application can satisfy: 0 < R22 / F ≤ 5, where R22 is the radius of curvature of the second side of the second lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the radius of curvature of the second side of the second lens to the total effective focal length of the optical lens within this range, it is beneficial to moderately diverge the front light rays. More specifically, R22 and F can further satisfy: 0.2 ≤ R22 / F ≤ 3. Controlling the ratio of R22 to F within this range, the second side (image side) of the second lens is concave, which has the effect of diverging light rays, enabling the light rays passing through the second lens to be released to a certain extent, allowing more marginal rays to enter the aperture, increasing the light flux, and improving the system illuminance. In one embodiment, R22 and F can further satisfy: 0.4 ≤ R22 / F ≤ 1.5.

[0650] In this embodiment, the optical lens according to the present application can satisfy the following condition: -8 ≤ F8 / F, where F8 is the effective focal length of the eighth lens element and F is the total effective focal length of the optical lens element. By controlling the ratio of the effective focal length of the eighth lens element to the total effective focal length of the optical lens element within this range, the eighth lens element has a negative optical power, and the light passing through the eighth lens tends to diverge, allowing more light to enter the image plane, effectively increasing the luminous flux.

[0651] More specifically, F8 and F can further satisfy the following ratio: -5 ≤ F8 / F ≤ -0.25. Controlling the F8 to F ratio within this range effectively increases light throughput while also facilitating a large image surface and minimal distortion. In one embodiment, F8 and F can further satisfy the following ratio: -2.5 ≤ F8 / F ≤ -0.4.

[0652] In this embodiment, the optical lens according to the present application can satisfy: F1 / F≤8, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. By controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens within this range, the focal length of the first lens is reasonably distributed, which is conducive to the entry of light with a large field of view angle into the optical system. More specifically, F1 and F can further satisfy: 0.3≤F1 / F≤5. Controlling the ratio of F1 to F within this range can be more conducive to the entry of light with a large field of view angle into the optical system. In one embodiment, F1 and F can also satisfy: 1.2≤F1 / F≤3.5.

[0653] In this embodiment, the optical lens according to the present application can satisfy the following conditions: 0.7 ≤ R62 / R71 ≤ 1.3, where R62 is the radius of curvature of the second side surface of the sixth lens element, and R71 is the radius of curvature of the first side surface of the seventh lens element. By aligning the radius of curvature of the second side surface of the sixth lens element with the radius of curvature of the first side surface of the seventh lens element, the sixth and seventh lenses can be cemented together, exhibiting opposite positive and negative optical powers. Cementing lenses with positive and negative optical powers facilitates chromatic aberration correction and improves image resolution. Furthermore, the use of a cemented component can reduce sensitivity to tolerances such as tilt and deflection that occur during the assembly of individual lenses, further enhancing system performance. The cemented component also promotes smooth light transitions and reduces system sensitivity. More specifically, R62 and R71 can further satisfy the following conditions: 0.8 ≤ R62 / R71 ≤ 1.2. Controlling the ratio of R62 to R71 within this range can better correct chromatic aberration, improve image resolution, and further enhance system performance and reduce system sensitivity. In one embodiment, R62 and R71 may further satisfy: 0.9≤R62 / R71≤1.1. In one embodiment, R62 and R71 may further satisfy: 0.95≤R62 / R71≤1.05.

[0654] In this embodiment, the optical lens according to the present application can meet the requirement: d67 / TTL ≤ 0.05, where d67 is the air gap between the sixth lens and the seventh lens on the optical axis, and TTL is the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis. By controlling the ratio of the air gap between the sixth lens and the seventh lens on the optical axis to the distance from the center of the first side of the first lens to the imaging surface of the optical lens on the optical axis within this range, the central air gap between the sixth lens and the seventh lens is very small, and the two can be cemented. The cementing of lenses with positive and negative optical powers is beneficial to the correction of chromatic aberration and the improvement of resolution. Moreover, the use of cemented components can reduce the tolerance sensitivity such as tilt / eccentricity generated during the assembly of individual lenses, and further improve the system performance. More specifically, d67 and TTL can further meet the requirement: d67 / TTL ≤ 0.03. Controlling the ratio of d67 to TTL within this range can better correct chromatic aberration, improve resolution, and further enhance the system performance. d67 and TTL can also meet the requirement in another embodiment: d67 / TTL ≤ 0.02. And in another embodiment, it can meet the requirement: d67 / TTL ≤ 0.01.

[0655] In this embodiment, the optical lens according to the present application can meet the requirement: 0.6 ≤ |F67 / F|, where F67 is the combined focal length of the sixth lens and the seventh lens, and F is the total effective focal length F of the optical lens. By controlling the absolute value of the ratio of the combined focal length of the sixth lens and the seventh lens to the total effective focal length of the optical lens within this range, the light path entering the cemented component can be effectively controlled, the aberration caused by large-angle light incident from the front end can be reduced, the light can enter the image surface smoothly, and at the same time, the lens structure can be made compact, which is beneficial to miniaturization. In this embodiment, the value of |F67 / F| can be equal to, for example, 80, 70, 50, 30, 15, 7, 3.5, and 1.0. More specifically, F67 and F can further meet the requirement: 0.8 ≤ |F67 / F| ≤ 80. Controlling the absolute value of the ratio of F67 to F within this range can better control the light path, reduce aberration, and be more beneficial to miniaturization. F67 and F can also meet the requirement in another embodiment: 1 ≤ |F67 / F| ≤ 55.

[0656] In this embodiment, the optical lens according to the present application can meet the requirement: 0 < F45 / F ≤ 3, where F45 is the combined focal length of the fourth lens and the fifth lens, and F is the total effective focal length of the optical lens. By controlling the ratio of the combined focal length of the fourth lens and the fifth lens to the total effective focal length of the optical lens within this range, and controlling the focal length of the cemented component of the fourth lens and the fifth lens to be positive, it is beneficial to the smooth convergence of light to the imaging surface and the improvement of resolution. More specifically, F45 and F can further meet the requirement: 0.25 ≤ F45 / F ≤ 2.5. Controlling the ratio of F45 to F within this range can better make the light converge smoothly to the imaging surface and further improve the resolution.

[0657] In this embodiment, the optical lens according to the present application can satisfy the following conditions: -10≤R42 / R51≤4, where R42 is the radius of curvature of the second side surface of the fourth lens, and R51 is the radius of curvature of the first side surface of the fifth lens. By controlling the ratio of the radius of curvature of the second side surface of the fourth lens to the radius of curvature of the first side surface of the fifth lens within this range, the path of light on the image side of the fourth lens and the object side of the fifth lens can be smoothed, thereby improving resolution. More specifically, R42 and R51 can further satisfy the following conditions: -7≤R42 / R51≤3. Controlling the ratio of R42 to R51 within this range can make the path of light between the fourth lens and the fifth lens even smoother, further improving resolution. In one embodiment, R42 and R51 can further satisfy the following conditions: 0.8≤R42 / R51≤1.2. And in one embodiment, they can further satisfy the following conditions: 0.9≤R42 / R51≤1.1.

[0658] In this embodiment, the optical lens according to the present application can satisfy the following conditions: d45 / TTL ≤ 0.04, where d45 is the air spacing between the fourth and fifth lenses on the optical axis, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. By controlling the ratio of the air spacing between the fourth and fifth lenses on the optical axis to the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens within this range, the air spacing between the centers of the fourth and fifth lenses is very small, reducing the overall optical length, facilitating smoother light path between the fourth and fifth lenses, and improving image resolution. More specifically, d45 and TTL can further satisfy the following conditions: d45 / TTL ≤ 0.03. Controlling the ratio of d45 to TTL within this range further reduces the overall optical length, ensuring smoother light path between the fourth and fifth lenses, and further improving image resolution. In one embodiment, d45 and TTL can further satisfy the following conditions: d45 / TTL ≤ 0.025. Furthermore, in another embodiment, d45 / TTL ≤ 0.015.

[0659] In this embodiment, the optical lens according to the present application can satisfy the following conditions: |F34 / F| ≤ 8.5, where F34 is the combined focal length of the third and fourth lenses, and F is the total effective focal length of the optical lens. By controlling the absolute value of the ratio of the combined focal length of the third and fourth lenses to the total effective focal length of the optical lens within this range, the focal length of the cemented component of the third and fourth lenses is kept relatively small, which helps maintain the light's path through the aperture expansion, allowing for a smooth transition to the rear optical system, reducing sensitivity and improving resolution. More specifically, F34 and F can further satisfy the following conditions: |F34 / F| ≤ 6. Controlling the absolute value of the ratio of F34 to F within this range allows for a smoother transition of light to the rear optical system, further reducing sensitivity and improving resolution.

[0660] In this embodiment, the optical lens according to the present application can satisfy: -6≤R32 / R41≤2, wherein R32 is the radius of curvature of the second side of the third lens, and R41 is the radius of curvature of the first side of the fourth lens. By controlling the ratio of the radius of curvature of the second side of the third lens to the radius of curvature of the first side of the fourth lens within this range, the movement of light on the image side of the third lens and the object side of the fourth lens can be smoothed, thereby improving the resolution. More specifically, R32 and R41 can further satisfy: -5≤R32 / R41≤1.5. Controlling the ratio of R32 to R41 within this range is conducive to making the movement of light between the third lens and the fourth lens smoother, thereby further improving the resolution. R32 and R41 can also further satisfy: 0.9≤R32 / R41≤1.1 in one embodiment.

[0661] In this embodiment, the optical lens according to the present application can satisfy the following conditions: d34 / TTL ≤ 0.04, where d34 is the air spacing between the third and fourth lenses on the optical axis, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. By controlling the ratio of the air spacing between the third and fourth lenses on the optical axis to the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens within this range, the air spacing between the centers of the third and fourth lenses is very small, reducing the overall optical length, facilitating smoother light path between the third and fourth lenses, and improving image resolution. More specifically, d34 and TTL can further satisfy the following conditions: d34 / TTL ≤ 0.035. Controlling the ratio of d34 to TTL within this range further reduces the overall optical length, ensuring smoother light path between the third and fourth lenses, and further improving image resolution. Furthermore, in one embodiment, d34 / TTL ≤ 0.02 can be satisfied.

[0662] In this embodiment, the optical lens according to the present application can satisfy the following condition: 45° ≤ (FOV × F) / H, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the maximum field of view of the optical lens, the total effective focal length of the optical lens, and the image height corresponding to the maximum field of view of the optical lens to satisfy the condition 45° ≤ (FOV × F) / H, the lens can simultaneously meet the requirements of long focus and high angular resolution.

[0663] More specifically, FOV, F, and H can further satisfy the following: 50° ≤ (FOV × F) / H ≤ 90°. Controlling FOV, F, and H to satisfy 50° ≤ (FOV × F) / H ≤ 90° can further facilitate achieving both telephoto and high angular resolution. In one embodiment, FOV, F, and H can further satisfy the following: 55° ≤ (FOV × F) / H ≤ 70°. Furthermore, in one embodiment, the following: 55° ≤ (FOV × F) / H ≤ 60° can further be achieved.

[0664] In this embodiment, the optical lens according to the present application can satisfy the following conditions: 1.0 ≤ F / H ≤ 2.5, where F is the total effective focal length of the optical lens and H is the image height corresponding to the maximum field of view angle of the optical lens. By controlling the ratio of the total effective focal length of the optical lens to the image height corresponding to the maximum field of view angle of the optical lens within this range, the ratio of focal length to image height can be reasonably designed, which is conducive to improving image resolution. More specifically, F and H can further satisfy the following conditions: 1.2 ≤ F / H ≤ 2. Controlling the ratio of F to H within this range can further facilitate improving image resolution. In one embodiment, F and H can also satisfy the following conditions: 1.5 ≤ F / H ≤ 1.8.

[0665] In this embodiment, the optical lens according to the present application can satisfy: |(R11 / D1) / (R12 / D2)|≤1, wherein R11 is the radius of curvature of the first side of the first lens, D1 is the maximum effective light-clearance diameter of the first side of the first lens corresponding to the maximum field of view of the optical lens, R12 is the radius of curvature of the second side of the first lens, and D2 is the maximum effective light-clearance diameter of the second side of the first lens corresponding to the maximum field of view of the optical lens. By controlling the radius of curvature of the first side of the first lens, the maximum effective light-clearance diameter of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature of the second side of the first lens, and the maximum effective light-clearance diameter of the second side of the first lens corresponding to the maximum field of view of the optical lens to satisfy the conditional formula |(R11 / D1) / (R12 / D2)|≤1, the height of the edge light entering the lens can be effectively limited, which is conducive to lowering the light and achieving a small aperture at the front end. More specifically, R11, D1, R12, and D2 can further satisfy the following: |(R11 / D1) / (R12 / D2)|≤0.8. Controlling R11, D1, R12, and D2 to satisfy |(R11 / D1) / (R12 / D2)|≤0.8 can further help suppress light and better achieve a small front-end aperture. In one embodiment, R11, D1, R12, and D2 can further satisfy the following: 0.1≤|(R11 / D1) / (R12 / D2)|≤0.6. Furthermore, in one embodiment, they can satisfy the following: 0.2≤|(R11 / D1) / (R12 / D2)|≤0.55.

[0666] In this embodiment, the optical lens according to the present application can satisfy the following conditions: D1 / H / FOV ≤ 0.1, where FOV is the maximum field of view of the optical lens, D1 is the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. By controlling the maximum field of view of the optical lens, the maximum effective aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, and the image height corresponding to the maximum field of view of the optical lens to satisfy the conditional formula D1 / H / FOV ≤ 0.1, the maximum aperture of the lens is small while the image height corresponding to the maximum field of view of the lens optical system and the maximum field of view remain unchanged, thereby achieving miniaturization. More specifically, D1, H, and FOV can further satisfy the following conditions: D1 / H / FOV ≤ 0.075. Controlling D1, H, and FOV to satisfy D1 / H / FOV ≤ 0.075 can further achieve miniaturization. In one embodiment, D1, H, and FOV can also satisfy the following conditions: D1 / H / FOV ≤ 0.05.

[0667] In this embodiment, the optical lens according to the present application can satisfy the following conditions: TTL / H / FOV ≤ 0.2, where FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and TTL is the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens. By controlling the maximum field of view of the optical lens, the image height corresponding to the maximum field of view of the optical lens, and the distance on the optical axis from the center of the first side surface of the first lens to the imaging plane of the optical lens to satisfy the conditional equation TTL / H / FOV ≤ 0.2, the overall length of the optical system can be reduced while the image height corresponding to the maximum field of view and the maximum field of view of the lens optical system remain unchanged, thereby facilitating miniaturization. More specifically, TTL, H, and FOV can further satisfy the following conditions: TTL / H / FOV ≤ 0.15. Controlling TTL, H, and FOV to satisfy TTL / H / FOV ≤ 0.15 can further reduce the overall length of the optical system, further facilitating miniaturization. TTL, H, and FOV can also further satisfy the following conditions: TTL / H / FOV ≤ 0.12 in one embodiment.

[0668] In this embodiment, the optical lens according to the present application can satisfy the following conditions: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5, where H is the image height corresponding to the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field angle of the optical lens. By controlling the image height corresponding to the maximum field angle of the optical lens, the total effective focal length of the optical lens, and the radian value corresponding to the maximum field angle of the optical lens to satisfy the conditional formula 0.5≤(H / 2) / (F×tan(θ / 2))≤1.5, the closer the actual image height is to the ideal image height, the smaller the lens distortion. More specifically, H, F, and θ can further satisfy the following conditions: 0.65≤(H / 2) / (F×tan(θ / 2))≤1.4. By controlling H, F, and θ to satisfy the following conditions: 0.65≤(H / 2) / (F×tan(θ / 2))≤1.4, small distortion can be further achieved. H, F, and θ may further satisfy, in one embodiment, 0.8≤(H / 2) / (F×tan(θ / 2))≤1.2. Also, in one embodiment, 0.9≤(H / 2) / (F×tan(θ / 2))≤1.05.

[0669] In this embodiment, the optical lens of the present application may further include a filter and / or protective glass disposed between the eighth lens element and the imaging surface, as needed. The filter may filter light having a specific wavelength, and the protective glass may prevent damage to the second side element (e.g., the chip) of the optical lens element.

[0670] In this embodiment, the first to eighth lenses may include aspheric lenses. This application does not specifically limit the specific number of spherical lenses and aspheric lenses. When focusing on the resolution quality, the number of aspheric lenses can be increased. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens can all be aspheric lenses. The characteristic of an aspheric lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspheric lens has a better curvature radius characteristic and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspheric lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The setting of the aspheric lens helps to correct system aberrations and improve the resolution.

[0671] In this embodiment, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens can all be glass lenses. Optical lenses made of glass can suppress the deviation of the back focus of the optical lens due to temperature changes, thereby improving system stability. At the same time, the use of glass material can avoid problems such as lens imaging blur caused by high and low temperature changes in the operating environment and affecting the normal use of the lens. Specifically, when temperature performance and resolution quality are of particular concern, the first lens to the eighth lens can all be glass aspherical lenses. In applications where temperature stability requirements are lower, the first lens to the eighth lens in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce production costs. Of course, the first lens to the eighth lens in the optical lens can also be made of a combination of plastic and glass.

[0672] According to the above-mentioned embodiment of the present application, the optical lens can have at least one of the beneficial effects of high resolution, miniaturization, small aperture, low sensitivity, high light throughput, long focus, small distortion and high performance by reasonably setting parameters such as the shape and optical focal length of each lens, so that the optical lens can better adapt to the ever-evolving requirements of automotive front-view lens applications.

[0673] However, those skilled in the art will appreciate that the number of lenses comprising the lens system can be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe an optical lens system using eight lenses as an example, the optical lens system is not limited to eight lenses. If desired, the optical lens system may also include other numbers of lenses. Specific examples of optical lenses applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0674] Example 25

[0675] The following describes an optical lens according to Example 25 of the present application with reference to Figure 25. Figure 25 shows a schematic structural diagram of an optical lens according to Example 25 of the present application.

[0676] As shown in FIG. 25 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0677] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0678] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0679] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0680] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0681] Table 29 shows the radius of curvature R, thickness / distance, refractive index N, and Abbe number Vd of each lens in the optical lens of Example 25. Regarding "thickness / distance," it should be understood that the thickness / distance in the row S1 is the center thickness of first lens L1, the thickness / distance in the row S2 is the air gap between first lens L1 and second lens L2, the thickness / distance in the row S3 is the center thickness of second lens L2, and so on.

[0682] Table 29

[0683] Example 26

[0684] The following describes an optical lens according to Example 26 of the present application with reference to Figure 26. Figure 26 shows a schematic structural diagram of an optical lens according to Example 26 of the present application.

[0685] As shown in FIG. 26 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0686] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-concave lens with negative optical power, whose first side surface S8 is convex and whose second side surface S9 is concave. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0687] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0688] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0689] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0690] Table 30 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 26.

[0691] Table 30

[0692] Example 27

[0693] The following describes an optical lens according to Example 27 of the present application with reference to Figure 27. Figure 27 shows a schematic structural diagram of an optical lens according to Example 27 of the present application.

[0694] As shown in FIG. 27 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0695] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S11 is convex and whose second side surface S12 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0696] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0697] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0698] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0699] Table 31 shows the curvature radius R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 27.

[0700] Table 31

[0701] Example 28

[0702] The following describes an optical lens according to Example 28 of the present application with reference to Figure 28. Figure 28 shows a schematic structural diagram of an optical lens according to Example 28 of the present application.

[0703] As shown in FIG. 28 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0704] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-concave lens with negative optical power, whose first side surface S11 is convex and whose second side surface S12 is concave. The seventh lens L7 is a convex-convex lens with positive optical power, whose first side surface S12 is convex and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0705] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0706] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0707] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0708] Table 32 shows the curvature radius R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 28.

[0709] Table 32

[0710] Example 29

[0711] The following describes an optical lens according to Example 29 of the present application with reference to Figure 29. Figure 29 shows a schematic structural diagram of an optical lens according to Example 29 of the present application.

[0712] As shown in FIG. 29 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0713] The first lens L1 is a convex-convex lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is convex. The second lens L2 is a concave-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0714] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the second side surface S4 of the second lens element L2.

[0715] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0716] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0717] Table 33 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 29.

[0718] Table 33

[0719] Example 30

[0720] The following describes an optical lens according to Example 30 of the present application with reference to Figure 30. Figure 30 shows a schematic structural diagram of an optical lens according to Example 30 of the present application.

[0721] As shown in FIG30 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0722] The first lens L1 is a convex-convex lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is convex. The second lens L2 is a concave-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-convex lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0723] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the second side surface S4 of the second lens element L2.

[0724] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0725] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0726] Table 34 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 30.

[0727] Table 34

[0728] Example 31

[0729] The following describes an optical lens according to Example 31 of the present application with reference to Figure 31. Figure 31 shows a schematic structural diagram of an optical lens according to Example 31 of the present application.

[0730] As shown in FIG31 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0731] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-concave lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a negative concave-concave lens with a concave first side surface S14 and a concave second side surface S15. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0732] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0733] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0734] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0735] Table 35 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 31.

[0736] Table 35

[0737] Example 32

[0738] The following describes an optical lens according to Example 32 of the present application with reference to Figure 32. Figure 32 shows a schematic structural diagram of an optical lens according to Example 32 of the present application.

[0739] As shown in FIG32 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0740] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-concave lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a negative concave-concave lens with a concave first side surface S14 and a concave second side surface S15. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0741] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0742] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0743] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0744] Table 36 shows the curvature radius R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 32.

[0745] Table 36

[0746] Example 33

[0747] The following describes an optical lens according to Example 33 of the present application with reference to Figure 33. Figure 33 shows a schematic structural diagram of an optical lens according to Example 33 of the present application.

[0748] As shown in FIG34 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0749] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-concave lens with negative optical power, whose first side surface S6 is convex and whose second side surface S7 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S7 is convex and whose second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The third lens L3 and the fourth lens L4 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0750] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0751] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0752] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0753] Table 37 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 33.

[0754] Table 37

[0755] Example 34

[0756] The following describes an optical lens according to Example 34 of the present application with reference to Figure 34. Figure 34 shows a schematic structural diagram of an optical lens according to Example 34 of the present application.

[0757] As shown in FIG34 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0758] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-concave lens with negative optical power, whose first side surface S6 is convex and whose second side surface S7 is concave. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S7 is convex and whose second side surface S8 is convex. The fifth lens L5 is a convex-convex lens with positive optical power, whose first side surface S9 is convex and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-convex lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is convex. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The third lens L3 and the fourth lens L4 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0759] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0760] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0761] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0762] Table 38 shows the curvature radius R, thickness / distance, refractive index N, and Abbe number Vd of each lens of the optical lens of Example 34.

[0763] Table 38

[0764] Example 35

[0765] The following describes an optical lens according to Example 35 of the present application with reference to Figure 35. Figure 35 shows a schematic structural diagram of an optical lens according to Example 35 of the present application.

[0766] As shown in FIG35 , the optical lens includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0767] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-concave lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is concave. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0768] The optical lens system also includes an aperture stop STO disposed between the second lens element L2 and the third lens element L3. This helps effectively converge light entering the optical system, reduces the diameter of the lens elements at the rear end of the optical system, and reduces the system's assembly sensitivity. For example, the aperture stop STO can be disposed between the second lens element L2 and the third lens element L3, near the first side surface S6 of the third lens element L3.

[0769] In this embodiment, the optical lens may further include a filter or a protective glass disposed between the eighth lens L8 and the imaging surface (IMA), and the filter or the protective glass may have, for example, a first side surface S16 and a second side surface S17.

[0770] When the optical lens is used for photography, light from the object passes through the surfaces S1 to S17 in sequence and is finally imaged on the imaging surface; when the optical lens is used for projection, light from the image source surface passes through the surfaces S17 to S1 in sequence and is finally projected onto the target object (not shown).

[0771] Table 39 shows the curvature radius R, thickness / distance, refractive index N and Abbe number Vd of each lens of the optical lens of Example 35.

[0772] Table 39

[0773] Example 36

[0774] The following describes an optical lens according to Example 36 of the present application with reference to Figure 36. Figure 36 shows a schematic structural diagram of an optical lens according to Example 36 of the present application.

[0775] As shown in FIG36 , the optical lens system includes, from the first side to the second side along the optical axis, a first lens L1 , a second lens L2 , a third lens L3 , a fourth lens L4 , a fifth lens L5 , a sixth lens L6 , a seventh lens L7 and an eighth lens L8 .

[0776] The first lens L1 is a convex-concave lens with positive optical power, whose first side surface S1 is convex and whose second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, whose first side surface S3 is concave and whose second side surface S4 is concave. The third lens L3 is a convex-convex lens with positive optical power, whose first side surface S6 is convex and whose second side surface S7 is convex. The fourth lens L4 is a convex-convex lens with positive optical power, whose first side surface S8 is convex and whose second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with negative optical power, whose first side surface S9 is concave and whose second side surface S10 is convex. The sixth lens L6 is a convex-convex lens with positive optical power, whose first side surface S11 is convex and whose second side surface S12 is convex. The seventh lens L7 is a convex-concave lens with negative optical power, whose first side surface S12 is concave and whose second side surface S13 is concave. The eighth lens L8 is a meniscus lens with negative optical power. Its first side surface S14 is concave, and its second side surface S15 is convex. The fourth lens L4 and the fifth lens L5 are cemented together to form a doublet, while the sixth lens L6 and the seventh lens L7 are cemented together to form a doublet.

[0777] The opt...

Claims

1. An optical lens, characterized in that: The lens includes, from the first side to the second side: a first lens with positive optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with optical power; a fifth lens with optical power; and a sixth lens with negative optical power.

2. The optical lens according to claim 1, characterized in that: The first side surface of the first lens is a convex surface, and the second side surface is a concave surface.

3. The optical lens according to claim 1, characterized in that: The first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

4. The optical lens according to claim 1, characterized in that: The first side surface of the second lens is a concave surface, and the second side surface is a concave surface.

5. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a convex surface, and the second side surface is a convex surface.

6. The optical lens according to claim 1, characterized in that: The first side surface of the third lens is a concave surface, and the second side surface is a convex surface.

7. The optical lens according to claim 1, characterized in that: The fourth lens has positive power, and a first side surface of the fourth lens is a convex surface, and a second side surface of the fourth lens is a convex surface.

8. The optical lens according to claim 1, characterized in that: The fourth lens has negative optical power, and a first side surface of the fourth lens is a convex surface, and a second side surface of the fourth lens is a concave surface.

9. The optical lens according to claim 1, characterized in that: The fifth lens has negative optical power, and a first side surface of the fifth lens is a concave surface, and a second side surface of the fifth lens is a convex surface.

10. The optical lens according to claim 1, characterized in that: The fifth lens has negative optical power, and a first side surface of the fifth lens is a concave surface, and a second side surface of the fifth lens is a concave surface.

11. The optical lens according to claim 1, characterized in that: The fifth lens has positive optical power, and a first side surface of the fifth lens is a convex surface, and a second side surface of the fifth lens is a concave surface.

12. The optical lens according to claim 1, characterized in that: The first side surface of the sixth lens is a concave surface, and the second side surface is a convex surface.

13. The optical lens according to claim 1, characterized in that: The first side surface of the sixth lens is a concave surface, and the second side surface is a concave surface.

14. The optical lens according to claim 1, characterized in that: The first side surface of the sixth lens is a convex surface, and the second side surface is a concave surface.

15. The optical lens according to claim 1, characterized in that: The fourth lens and the fifth lens are cemented together to form a doublet lens.

16. The optical lens according to claim 1, characterized in that: The optical lens further includes an aperture stop, and the aperture stop is arranged between the second lens and the third lens.

17. The optical lens according to any one of claims 1 to 16, characterized in that: The total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens and the entire focal length value F of the optical lens satisfy the following relationship: TTL / F≤4.

18. The optical lens according to any one of claims 1 to 16, characterized in that: The focal length value F of the entire optical lens, the arc value θ of the maximum field angle of the optical lens and the maximum light clearance diameter D of the first side surface of the first lens satisfy: (F*θ) / D≥0.

2.

19. The optical lens according to any one of claims 1 to 16, characterized in that: The maximum light clearance diameter D of the first side surface of the first lens, the image height H corresponding to the maximum field of view of the optical lens and the maximum field of view FOV of the optical lens satisfy the following relationship: D / H / FOV≤0.

08.

20. The optical lens according to any one of claims 1 to 16, characterized in that: The maximum light aperture D of the first side surface of the first lens, the image height H corresponding to the maximum field angle of the optical lens, and the entire focal length value F of the optical lens satisfy the following: D / H / F≤0.

2.

21. The optical lens according to any one of claims 1 to 16, characterized in that: The entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy the following: F / θ≤30.

22. The optical lens according to any one of claims 1 to 16, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy the following: |(HF*θ) / (F*θ)|≤0.

06.

23. The optical lens according to any one of claims 1 to 16, characterized in that: The whole set focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤3.

24. The optical lens according to any one of claims 1 to 16, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the entire focal length value F of the optical lens and the arc value θ of the maximum field angle of the optical lens satisfy the following: 0.4≤(H / 2) / (F*tan(θ / 2))≤2.

25. The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R4 of the second side surface of the second lens and a curvature radius R5 of the first side surface of the third lens satisfy: |R4 / R5|≤20.

26. The optical lens according to any one of claims 1 to 16, characterized in that: The focal length F6 of the sixth lens and the focal length F of the entire optical lens group satisfy: F6 / F≥-7.

27. The optical lens according to any one of claims 1 to 16, characterized in that: The focal length F2 of the second lens and the focal length F3 of the third lens satisfy: -5≤F2 / F3≤-0.

02.

28. The optical lens according to any one of claims 1 to 16, characterized in that: The focal length value F of the entire group of the optical lens, the radius of curvature R3 of the first side surface of the second lens, and the radius of curvature R4 of the second side surface of the second lens satisfy: |F / R3|+|F / R4|≤8.

29. The optical lens according to any one of claims 1 to 16, characterized in that: The air distance d7 between the third lens and the fourth lens and the optical back focus of the optical lens, that is, the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging surface, satisfy the following: (d7*BFL) / (d7+BFL)≤1.

30. The optical lens according to any one of claims 1 to 16, characterized in that: The curvature radius R6 of the second side surface of the third lens satisfies the following relationship with the focal length F of the entire optical lens set: |R6 / F|≤10.

31. The optical lens according to any one of claims 1 to 16, characterized in that: The curvature radius R7 of the first side surface of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens group: R7 / F≤7.

32. The optical lens according to any one of claims 1 to 16, characterized in that: A radius of curvature R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens set: |R10 / F|≥1.

2.

33. The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R11 of the first side surface of the sixth lens satisfies the following relationship with the entire focal length F of the optical lens: |R11 / F|≤5.

34. The optical lens according to any one of claims 1 to 16, characterized in that: The radius of curvature R10 of the second side surface of the fifth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens, satisfy: |R10 / TTL|≥0.

8.

35. The optical lens according to any one of claims 1 to 16, characterized in that: The center thickness d6 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens, satisfy the following: d6 / TTL≥0.

02.

36. The optical lens according to any one of claims 1 to 16, characterized in that: The total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens and the center thickness d11 of the sixth lens satisfy the following condition: TTL / d11≥6.

37. The optical lens according to any one of claims 1 to 16, characterized in that: The center thickness d8 of the fourth lens, the center thickness d9 of the fifth lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens satisfy: (d8+d9) / TTL≥0.

05.

38. The optical lens according to any one of claims 1 to 16, characterized in that: The distance d26 between the first lens and the third lens, the center thickness d6 of the third lens and the total optical length of the optical lens, that is, the center distance TTL from the center of the first side of the first lens to the imaging surface of the optical lens satisfy: |(d26-d6) / TTL|≤0.

15.

39. The optical lens according to any one of claims 1 to 16, characterized in that: The central thickness d3 of the second lens and the central thickness d6 of the third lens satisfy: 0.2≤d3 / d6.

40. The optical lens according to any one of claims 1 to 16, characterized in that: A distance d26 between the first lens and the third lens, a center thickness d6 of the third lens, and a curvature radius R5 of a first side surface of the third lens satisfy: |(d26-d6) / R5|≤0.

4.

41. The optical lens according to any one of claims 1 to 16, characterized in that: A maximum light aperture D of the first side surface of the first lens and a curvature radius R1 of the first side surface of the first lens satisfy: D / R1≥0.

05.

42. The optical lens according to any one of claims 1 to 16, characterized in that: The maximum effective light aperture D7 of the first side surface of the fourth lens corresponding to the maximum field angle of the optical lens, the radius of curvature R7 of the first side surface of the fourth lens and the vector height SAG7 of the first side surface of the fourth lens satisfy the following: arctan(D7 / (R7-SAG7))≥0.

2.

43. The optical lens according to any one of claims 1 to 16, characterized in that: A radius of curvature R10 of the second side surface of the fifth lens, a center thickness d8 of the fourth lens, and a center thickness d9 of the fifth lens satisfy the following: |R10 / (d8+d9)|≥2.

5.

44. The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R10 of the second side surface of the fifth lens and a center thickness d9 of the fifth lens satisfy: |R10 / d9|≥5.

2.

45. The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R12 of the second side surface of the sixth lens and a center thickness d11 of the sixth lens satisfy the following: |R12 / d11|≤55.

46. ​​The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R11 of the first side surface of the sixth lens and a curvature radius R12 of the second side surface of the sixth lens satisfy: |R11 / R12|≥0.

1.

47. The optical lens according to any one of claims 1 to 16, characterized in that: A curvature radius R10 of the second side surface of the fifth lens and a curvature radius R11 of the first side surface of the sixth lens satisfy: |R10 / R11|≥4.

3.

48. An electronic device, characterized in that: The invention comprises the optical lens according to any one of claims 1 to 47 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

49. An optical lens, characterized in that: include: a first lens having positive optical power; a second lens having optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power; a sixth lens having optical power; The seventh lens has optical power; the eighth lens has negative optical power.

50. The optical lens according to claim 49, characterized in that: The first side surface of the first lens is a convex surface, and the second side surface of the first lens is a concave surface.

51. The optical lens according to claim 49, characterized in that: The first side surface of the first lens is a convex surface, and the second side surface of the first lens is a convex surface.

52. The optical lens according to claim 49, characterized in that: The second lens has negative optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

53. The optical lens according to claim 49, characterized in that: The second lens has negative optical power, a first side surface of the second lens is a concave surface, and a second side surface of the second lens is a convex surface.

54. The optical lens according to claim 49, characterized in that: The second lens has positive optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a concave surface.

55. The optical lens according to claim 49, characterized in that: The first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface.

56. The optical lens according to claim 49, characterized in that: The first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

57. The optical lens according to claim 49, characterized in that: The first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface.

58. The optical lens according to claim 49, characterized in that: The first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a convex surface.

59. The optical lens according to claim 49, characterized in that: The sixth lens has negative optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

60. The optical lens according to claim 49, characterized in that: The sixth lens has positive optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a convex surface.

61. The optical lens according to claim 49, characterized in that: The sixth lens has positive optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

62. The optical lens according to claim 49, characterized in that: The seventh lens has positive power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a convex surface.

63. The optical lens according to claim 49, characterized in that: The seventh lens has negative optical power, a first side surface of the seventh lens is a concave surface, and a second side surface of the seventh lens is a convex surface.

64. The optical lens according to claim 49, characterized in that: The seventh lens has negative optical power, a first side surface of the seventh lens is a concave surface, and a second side surface of the seventh lens is a concave surface.

65. The optical lens according to claim 49, characterized in that: The seventh lens has negative optical power, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

66. The optical lens according to claim 49, characterized in that: The first side surface of the eighth lens is a concave surface, and the second side surface of the eighth lens is a concave surface.

67. The optical lens according to claim 49, characterized in that: The first side surface of the eighth lens is a convex surface, and the second side surface of the eighth lens is a concave surface.

68. The optical lens according to claim 49, characterized in that: The optical lens further includes a stop, and the stop is located between the second lens and the third lens.

69. The optical lens according to claim 49, characterized in that: The third lens and the fourth lens are a cemented lens, and the sixth lens and the seventh lens are a cemented lens.

70. The optical lens according to any one of claims 49 to 69, characterized in that: The sum d67 of the center thickness of the sixth lens and the center thickness of the seventh lens and the total length TTL of the optical lens satisfy the following relationship: d67 / TTL≤0.

3.

71. The optical lens according to any one of claims 49 to 69, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the optical lens at the maximum field angle satisfy the following: (F*θ) / D≥0.

3.

72. The optical lens according to any one of claims 49 to 69, characterized in that: The entire focal length value F of the optical lens, the maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: (FOV×F) / H≥45.

73. The optical lens according to any one of claims 49 to 69, characterized in that: The total length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤3.

74. The optical lens according to any one of claims 49 to 69, characterized in that: The entire focal length value F of the optical lens, the maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following: TTL / H / FOV≤0.

5.

75. The optical lens according to any one of claims 49 to 69, characterized in that: The whole set focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 0.5≤F / H≤3.

76. The optical lens according to any one of claims 49 to 69, characterized in that: The radius of curvature R1 of the first side surface of the first lens, the radius of curvature R2 of the second side surface of the first lens, the maximum effective light-clearance diameter D of the first side surface of the first lens corresponding to the maximum field of view angle, and the maximum effective light-clearance diameter D2 of the second side surface of the first lens corresponding to the maximum field of view angle satisfy: -1≤(R1 / D) / (R2 / D2)≤1.

77. The optical lens according to any one of claims 49 to 69, characterized in that: A curvature radius R9 of the first side surface of the fifth lens and a curvature radius R10 of the second side surface of the fifth lens satisfy: -6.5≤R9 / R10≤7.

78. The optical lens according to any one of claims 49 to 69, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: |(HF*θ) / (F*θ)|≤0.

05.

79. The optical lens according to any one of claims 49 to 69, characterized in that: The entire focal length value F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: F / ENPD≤2.

80. The optical lens according to any one of claims 49 to 69, characterized in that: The maximum light clearance diameter D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens, the entire group focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following relationship: D / H / F≤0.

2.

81. An optical lens according to any one of claims 49 to 69, characterized in that: The curvature radius R10 of the second side surface of the fifth lens and the maximum effective light aperture D9 of the first side surface of the fifth lens corresponding to the maximum field angle satisfy the following relationship: R10 / D9≥-7.

82. An optical lens according to any one of claims 49 to 69, characterized in that: The curvature radius R10 of the second side surface of the fifth lens satisfies the following relationship with the focal length F of the entire optical lens set: R10 / F≥-3.

5.

83. An optical lens according to any one of claims 49 to 69, characterized in that: A radius of curvature R15 of the second side surface of the eighth lens and a total optical length TTL of the optical lens satisfy the following relationship: R15 / TTL>0.

001.

84. The optical lens according to any one of claims 49 to 69, characterized in that: The curvature radius R15 of the second side surface of the eighth lens satisfies the optical back focus of the optical lens: R15 / BFL≥0.

5.

85. The optical lens according to any one of claims 49 to 69, characterized in that: The optical back focus BFL of the optical lens and the entire focal length value F of the optical lens satisfy the following relationship: BFL / F≤0.

54.

86. The optical lens according to any one of claims 49 to 69, characterized in that: The curvature radius R15 of the second side surface of the eighth lens satisfies the following relationship with the focal length F of the entire optical lens group: R15 / F≥0.

3.

87. An electronic device, characterized in that: The optical lens comprises the optical lens according to any one of claims 49 to 86 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

88. An optical lens, characterized in that: The optical lens comprises, in order from the first side to the second side along the optical axis: a first lens with positive optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with optical power; a sixth lens with optical power; a seventh lens with optical power; and an eighth lens with negative optical power.

89. The optical lens according to claim 88, characterized in that: The first side surface of the first lens is a convex surface, and the second side surface is a concave surface or a convex surface.

90. The optical lens according to claim 88, characterized in that: The second lens has negative optical power, and a first side surface and a second side surface of the second lens are concave.

91. The optical lens according to claim 88, characterized in that: The third lens has positive power, and its first side surface is convex, and its second side surface is convex; or The third lens has negative optical power, a first side surface of the third lens is convex, and a second side surface of the third lens is concave.

92. The optical lens according to claim 88, characterized in that: The fourth lens has positive power, and its first side surface is convex, and its second side surface is convex; or The fourth lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or The fourth lens has negative optical power, a first side surface of the fourth lens is convex, and a second side surface of the fourth lens is concave.

93. The optical lens according to claim 88, characterized in that: The fifth lens has positive power, and its first side surface is convex, and its second side surface is convex; or The fifth lens has negative optical power, a first side surface of the fifth lens is concave, and a second side surface of the fifth lens is convex.

94. The optical lens according to claim 88, characterized in that: The sixth lens has negative optical power, and its first side surface is convex and its second side surface is concave; or The sixth lens has positive refractive power, and its first side surface is convex, and its second side surface is convex.

95. The optical lens according to claim 88, characterized in that: The seventh lens has positive power, and its first side surface is convex, and its second side surface is convex; or The seventh lens has negative optical power, and its first side surface is concave, and its second side surface is concave; or The seventh lens has negative optical power, a first side surface of the seventh lens is concave, and a second side surface of the seventh lens is convex.

96. The optical lens according to claim 88, characterized in that: The first side surface of the eighth lens is a concave surface, and the second side surface is a concave surface or a convex surface.

97. The optical lens according to claim 88, characterized in that: The optical lens further includes a stop disposed between the second lens and the third lens.

98. The optical lens according to claim 88, characterized in that: The third lens and the fourth lens are cemented together to form a doublet lens.

99. The optical lens according to claim 88, characterized in that: The fourth lens and the fifth lens are cemented together to form a doublet lens.

100. The optical lens according to claim 88, characterized in that: The sixth lens and the seventh lens are cemented together to form a doublet lens.

101. The optical lens according to any one of claims 88 to 100, characterized in that: A distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis and a total effective focal length F of the optical lens satisfy: TTL / F≤3.

5.

102. The optical lens according to any one of claims 88 to 100, characterized in that: The total effective focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD≤2.

103. The optical lens according to any one of claims 88 to 100, characterized in that: The curvature radius R31 of the first side surface of the third lens and the total effective focal length F of the optical lens satisfy: <R31 / F≤20。 104. The optical lens according to claim 103, characterized in that: Satisfies: 0.4≤R31 / F≤10.

105. The optical lens according to any one of claims 88 to 100, characterized in that: The curvature radius R52 of the second side surface of the fifth lens and the total effective focal length F of the optical lens satisfy: -20≤R52 / F<0.

106. The optical lens according to any one of claims 88 to 100, characterized in that: The radius of curvature R61 of the first side surface of the sixth lens and the total effective focal length F of the optical lens satisfy: <R61 / F≤20。 107. The optical lens according to any one of claims 88 to 100, characterized in that: A curvature radius R21 of the first side surface of the second lens and a curvature radius R22 of the second side surface of the second lens satisfy: -12≤R21 / R22<0.

108. The optical lens according to any one of claims 88 to 100, characterized in that: Satisfies: -8≤R21 / F≤-0.

35.

109. The optical lens according to any one of claims 88 to 100, characterized in that: An air gap d23 between the second lens and the third lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.02≤d23 / TTL≤0.

4.

110. The optical lens according to claim 109, characterized in that: Satisfies: 0.035≤d23 / TTL≤0.

25.

111. The optical lens according to any one of claims 88 to 100, characterized in that: The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: -4≤F2 / F.

112. The optical lens according to claim 111, characterized in that: Satisfies: -2.5≤F2 / F≤-0.

3.

113. The optical lens according to any one of claims 88 to 100, characterized in that: The radius of curvature R22 of the second side surface of the second lens satisfies the total effective focal length F of the optical lens: <R22 / F≤5。 114. The optical lens according to any one of claims 88 to 100, characterized in that: The effective focal length F8 of the eighth lens and the total effective focal length F of the optical lens satisfy: -8≤F8 / F.

115. The optical lens according to claim 114, characterized in that: Satisfies: -5≤F8 / F≤-0.

25.

116. The optical lens according to any one of claims 88 to 100, characterized in that: The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: F1 / F≤8.

117. The optical lens according to any one of claims 88 to 100, characterized in that: An air gap d67 between the sixth lens and the seventh lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d67 / TTL≤0.

05.

118. The optical lens according to any one of claims 88 to 100, characterized in that: A combined focal length F67 of the sixth lens and the seventh lens and a total effective focal length F of the optical lens satisfy the following: 0.6≤|F67 / F|.

119. The optical lens according to any one of claims 88 to 100, characterized in that: The maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 45°≤(FOV×F) / H.

120. The optical lens according to claim 119, characterized in that: Satisfies: 50°≤(FOV×F) / H≤90°.

121. The optical lens according to any one of claims 88 to 100, characterized in that: The total effective focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following: 1.0≤F / H≤2.

5.

122. The optical lens according to any one of claims 88 to 100, characterized in that: The radius of curvature R11 of the first side surface of the first lens, the maximum effective light-clearing aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the radius of curvature R12 of the second side surface of the first lens, and the maximum effective light-clearing aperture D2 of the second side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: |(R11 / D1) / (R12 / D2)|≤1.

123. The optical lens according to any one of claims 88 to 100, characterized in that: The maximum field of view FOV of the optical lens, the maximum effective light clearance aperture D1 of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: D1 / H / FOV≤0.

1.

124. The optical lens according to any one of claims 88 to 100, characterized in that: The distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV≤0.

2.

125. The optical lens according to any one of claims 88 to 100, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens and the radian value θ corresponding to the maximum field angle of the optical lens satisfy: 0.5≤(H / 2) / (F×tan(θ / 2))≤1.

5.

126. The optical lens according to any one of claims 88 to 100, characterized in that: The combined focal length F45 of the fourth lens and the fifth lens and the total effective focal length F of the optical lens satisfy: <F45 / F≤3。 127. The optical lens according to any one of claims 88 to 100, characterized in that: A curvature radius R42 of the second side surface of the fourth lens and a curvature radius R51 of the first side surface of the fifth lens satisfy: -10≤R42 / R51≤4.

128. The optical lens according to any one of claims 88 to 100, characterized in that: An air interval d45 between the fourth lens and the fifth lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d45 / TTL≤0.

04.

129. The optical lens according to any one of claims 88 to 100, characterized in that: The combined focal length F34 of the third lens and the fourth lens and the total effective focal length F of the optical lens satisfy: |F34 / F|≤8.

5.

130. The optical lens according to any one of claims 88 to 100, characterized in that: A curvature radius R32 of the second side surface of the third lens and a curvature radius R41 of the first side surface of the fourth lens satisfy: -6≤R32 / R41≤2.

131. An optical lens according to any one of claims 88 to 100, characterized in that: An air gap d34 between the third lens and the fourth lens on the optical axis and a distance TTL from the center of the first side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: d34 / TTL≤0.

04.

132. An optical lens according to any one of claims 88 to 100, characterized in that: The curvature radius R21 of the first side surface of the second lens and the total effective focal length F of the optical lens satisfy: -12≤R21 / F<0.

133. An optical lens according to any one of claims 88 to 100, characterized in that: A curvature radius R62 of the second side surface of the sixth lens and a curvature radius R71 of the first side surface of the seventh lens satisfy: 0.7≤R62 / R71≤1.

3.

134. An electronic device, characterized in that: It comprises an optical lens according to any one of claims 88-133 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

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