Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens with positive focal power, a first side of the first lens being a convex surface; a first side of a second lens and a second side of the second lens being opposite in surface shape; a third lens with positive focal power, a first side of the third lens being a concave surface, and a second side of the third lens being a convex surface; a fourth lens with negative focal power, a first side of the fourth lens being a concave surface, and a second side of the fourth lens being a convex surface; a fifth lens with positive focal power, a second side of the fifth lens being a convex surface; a sixth lens with focal power, a first side of the sixth lens being a convex surface; a seventh lens with focal power; and an eighth lens with negative focal power, a second side of the eighth lens being a concave surface. The application solves the problem that, in the prior art, the optical lens has a small light quantity, high resolution and small caliber, and cannot be compatible with each other, and miniaturization limits lens design, resulting in a high sensitivity, poor trade-off of aberration and the like.

Description

Technical Field

[0001] This invention relates to the field of optical imaging equipment technology, and more specifically, to an optical lens and an electronic device. Background Technology

[0002] With the development of technology, the application scenarios of optical lenses are gradually increasing, and users' requirements for the optical performance of optical lenses are also gradually increasing. Currently, optical lenses are gradually developing towards miniaturization. However, due to size limitations, optical lenses suffer from problems such as sensitivity, aberrations, and poor image quality in low-light environments, which are difficult to balance. As an indispensable "eye" for automobiles, automotive lenses play a crucial role in intelligent driving. With the rapid development of autonomous driving assistance systems, users' demands for automotive lenses are also increasing. Furthermore, to meet the requirements of safe driving and accommodate the special installation locations of automotive lenses, the lenses in autonomous driving assistance systems have even more specific requirements.

[0003] With the continuous iteration and improvement of semiconductor technology, the pixel count of chips is also gradually increasing. This means that automotive lenses that match the chips also need to improve their performance to meet the chip's requirements. At the same time, the space in cars is also being optimized, requiring the size of automotive lenses to become smaller and smaller. This leads to a gradual reduction in the aperture of automotive lenses, resulting in problems such as poor resolution, high sensitivity, and large aberrations. It also causes problems such as low light transmission, making it impossible to achieve clear imaging in dark environments.

[0004] In other words, existing optical lenses suffer from problems such as low light transmission, an inability to balance high resolution and small aperture, and limitations in lens design due to miniaturization, resulting in a poor balance between high sensitivity and aberrations. Summary of the Invention

[0005] The main objective of this invention is to provide an optical lens and electronic device to solve at least one of the following problems in the prior art: low light transmission, inability to balance high resolution and small aperture, and limitations in lens design due to miniaturization, resulting in an inability to achieve a good balance between high sensitivity and aberrations.

[0006] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising: a first lens having positive optical power and a first side surface of the first lens being convex; a second lens having optical power and the first side surface of the second lens and the second side surface of the second lens having opposite surface shapes; a third lens having positive optical power and a first side surface of the third lens being concave and a second side surface of the third lens being convex; a fourth lens having negative optical power and a first side surface of the fourth lens being concave and a second side surface of the fourth lens being convex; a fifth lens having positive optical power and a second side surface of the fifth lens being convex; a sixth lens having optical power and a first side surface of the sixth lens being convex; a seventh lens having optical power; and an eighth lens having negative optical power and a second side surface of the eighth lens being concave.

[0007] Furthermore, the second side surface of the first lens is concave.

[0008] Furthermore, the second side surface of the first lens is convex.

[0009] Furthermore, 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.

[0010] Furthermore, 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.

[0011] Furthermore, 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.

[0012] Furthermore, the first side surface of the fifth lens is convex.

[0013] Furthermore, the first side surface of the fifth lens is concave.

[0014] Furthermore, the sixth lens has negative optical power, and the second side surface of the sixth lens is concave.

[0015] Furthermore, the sixth lens has positive optical power, and the second side surface of the sixth lens is convex.

[0016] Furthermore, the sixth lens has positive optical power, and the second side surface of the sixth lens is concave.

[0017] Furthermore, the seventh lens has positive optical power, and the first side surface of the seventh lens is convex, as is the second side surface of the seventh lens.

[0018] Furthermore, the seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

[0019] Furthermore, the seventh lens has negative optical power, and the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is also concave.

[0020] Furthermore, the seventh lens has negative optical power, the first side of the seventh lens is convex, and the second side of the seventh lens is concave.

[0021] Furthermore, the first side surface of the eighth lens is concave.

[0022] Furthermore, the first side surface of the eighth lens is convex.

[0023] Furthermore, the optical lens also includes an aperture stop, which is located between the second lens and the third lens.

[0024] Furthermore, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0025] Furthermore, the radius of curvature R15 of the second side of the eighth lens satisfies the following relationship with the total focal length F of the optical lens: R15 / F≥0.3.

[0026] Furthermore, the sum of the center thicknesses of the sixth lens and the seventh lens, d67, and the total length of the optical lens, TTL, satisfy the following condition: d67 / TTL≤0.3.

[0027] Furthermore, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: (F*θ) / D≥0.3.

[0028] Furthermore, the total 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.

[0029] Furthermore, the total length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: TTL / F≤3.

[0030] Furthermore, the total 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 condition: TTL / H / FOV≤0.5.

[0031] Furthermore, the total 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 condition: 0.5≤F / H≤3.

[0032] Furthermore, 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 aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following: -1≤(R1 / D) / (R2 / D2)≤1.

[0033] Furthermore, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -6.5≤R9 / R10≤7.

[0034] Furthermore, the total focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.05.

[0035] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤2.

[0036] Furthermore, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the total 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.

[0037] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view: R10 / D9≥-7.

[0038] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: R10 / F≥-3.5.

[0039] Furthermore, the radius of curvature R15 of the second side of the eighth lens satisfies the following relationship with the total optical length TTL of the optical lens: R15 / TTL>0.001.

[0040] Furthermore, the optical back focal length (BFL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: BFL / F ≤ 0.54.

[0041] Furthermore, the radius of curvature R15 of the second side of the eighth lens satisfies the following condition with respect to the optical back focal length of the optical lens: R15 / BFL≥0.5.

[0042] According to another aspect of the present invention, an optical lens is provided, comprising: 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; a seventh lens having optical power; and an eighth lens having negative optical power; wherein the radius of curvature R15 of the second side surface of the eighth lens satisfies the following relationship with the overall focal length F of the optical lens: R15 / F ≥ 0.3.

[0043] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0044] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is also convex.

[0045] Furthermore, 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.

[0046] Furthermore, 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.

[0047] Furthermore, 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.

[0048] Furthermore, the first side surface of the third lens is concave, and the second side surface of the third lens is convex.

[0049] Furthermore, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0050] Furthermore, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is also convex.

[0051] Furthermore, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

[0052] Furthermore, the sixth lens has negative optical power, the first side of the sixth lens is convex, and the second side of the sixth lens is concave.

[0053] Furthermore, the sixth lens has positive optical power, and the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is convex.

[0054] Furthermore, the sixth lens has positive optical power, the first side of the sixth lens is convex, and the second side of the sixth lens is concave.

[0055] Furthermore, the seventh lens has positive optical power, and the first side surface of the seventh lens is convex, as is the second side surface of the seventh lens.

[0056] Furthermore, the seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

[0057] Furthermore, the seventh lens has negative optical power, and the first side surface of the seventh lens is concave, and the second side surface of the seventh lens is also concave.

[0058] Furthermore, the seventh lens has negative optical power, the first side of the seventh lens is convex, and the second side of the seventh lens is concave.

[0059] Furthermore, the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is also concave.

[0060] Furthermore, the first side surface of the eighth lens is convex, and the second side surface of the eighth lens is concave.

[0061] Furthermore, the optical lens also includes an aperture stop, which is located between the second lens and the third lens.

[0062] Furthermore, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0063] Furthermore, the sum of the center thicknesses of the sixth lens and the seventh lens, d67, and the total length of the optical lens, TTL, satisfy the following condition: d67 / TTL≤0.3.

[0064] Furthermore, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: (F*θ) / D≥0.3.

[0065] Furthermore, the total 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.

[0066] Furthermore, the total length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: TTL / F≤3.

[0067] Furthermore, the total 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 condition: TTL / H / FOV≤0.5.

[0068] Furthermore, the total 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 condition: 0.5≤F / H≤3.

[0069] Furthermore, 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 aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following: -1≤(R1 / D) / (R2 / D2)≤1.

[0070] Furthermore, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -6.5≤R9 / R10≤7.

[0071] Furthermore, the total focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.05.

[0072] Furthermore, the total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following relationship: F / ENPD≤2.

[0073] Furthermore, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the total 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.

[0074] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view: R10 / D9≥-7.

[0075] Furthermore, the radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: R10 / F≥-3.5.

[0076] Furthermore, the radius of curvature R15 of the second side of the eighth lens satisfies the following relationship with the total optical length TTL of the optical lens: R15 / TTL>0.001.

[0077] Furthermore, the optical back focal length (BFL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: BFL / F ≤ 0.54.

[0078] Furthermore, the radius of curvature R15 of the second side of the eighth lens satisfies the following condition with respect to the optical back focal length of the optical lens: R15 / BFL≥0.5.

[0079] According to another aspect of the present invention, an electronic device is provided, including the aforementioned optical lens and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0080] According to the technical solution of this invention, 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 its first side surface is convex. The second lens has optical power, and the surface shapes of its first side surface and the second side surface are opposite. The third lens has positive optical power, and its first side surface is concave, and its second side surface is convex. The fourth lens has negative optical power, and its first side surface is concave, and its second side surface is convex. The fifth lens has positive optical power, and its second side surface is convex. The sixth lens has optical power, and its first side surface is convex. The seventh lens has optical power. The eighth lens has negative optical power, and its second side surface is concave.

[0081] The first lens has positive optical power and converges light. Its first side surface is convex, facilitating the collection of light over a wide area, allowing a large amount of light to enter the optical lens and improving its light transmission and illumination. The second side surface is concave, which helps reduce the lens's size to meet manufacturing requirements and lowers costs. Furthermore, the concave surface controls light transmission, reducing sensitivity to light transitions to the rear and improving resolution. The first lens uses a high-refractive-index material, which helps converge light at the front end, reducing the front aperture.

[0082] The first lens has positive optical power, and both its first and second sides are convex. This allows light rays passing through the first lens to converge more effectively when exiting from the second side, limiting the height of the light rays and thus reducing the aperture of the optical lens. This facilitates a smaller, more compact design. Furthermore, the use of spherical glass in the first lens allows for the addition of a waterproof coating while reducing manufacturing costs.

[0083] The second lens has negative optical power, a convex first side, and a concave second side. Setting the second lens to negative optical power and having a convex first side facilitates a smooth transition of light from the front end. The concave design of the second side allows the light converged on the first side to be released, filling the entrance pupil as much as possible and improving the target surface illumination.

[0084] The second lens has negative optical power. The first side of the second lens is concave, and the second side is convex. By setting the second lens to have negative optical power and designing the first side of the second lens to be concave to match the convex second side of the first lens, the light path becomes smoother. At the same time, setting the second side of the second lens to be convex perfectly receives the light and reduces the sensitivity of the optical lens.

[0085] The second lens has positive optical power, a convex first side, and a concave second side. The positive optical power and the meniscus shape convex towards the first side of the second lens compress light rays, reducing the rear aperture and achieving miniaturization.

[0086] The third lens has positive optical power, with its first side being concave and its second side being convex. The concave design of the first side of the third lens, with positive optical power, is intended to better receive light passing through the aperture, providing sufficient space for aberration adjustment in the subsequent optical system. The convex design of the second side ensures that the third and fourth lenses have similar light paths, reducing light loss due to inter-lens reflections, improving relative illumination, and minimizing field curvature to correct off-axis aberrations.

[0087] The fourth lens has negative optical power. The first side of the fourth lens is concave, and the second side is convex. The fourth lens adopts negative optical power. The first side of the fourth lens is concave to better receive the light rays incident through the third lens. The second side of the fourth lens is designed to be convex to change the direction of the light rays. At the same time, as a negative film of the cemented part, the material properties of the fourth lens also play a crucial role in correcting aberrations such as chromatic aberration.

[0088] The fifth lens has positive optical power. Both its first and second sides are convex. The positive optical power and the convex first side help to gather light from the preceding optical system and limit the rear aperture. As a crucial lens connecting the preceding and following lens groups, a smaller aperture reduces the impact of large aberrations caused by edge field of view rays, improving the lens's sensitivity and optical performance. Designing the second side of the fifth lens as convex optimizes the rear aperture size, while maintaining the sensitivity of light transmitted from the first side, further contributing to reduced sensitivity.

[0089] The fifth lens has positive optical power. Its first side is concave, and its second side is convex. By using positive optical power and making its first side concave to receive upward-facing rays, the lens maintains a consistent light trajectory, thus optimizing its sensitivity. The convex second side alters the light trajectory, allowing the light to transition smoothly backward.

[0090] The sixth lens has negative optical power. Its first side is convex, and its second side is concave. By setting the sixth lens to negative optical power, making its first side convex to converge light rays, and designing its second side concave to diverge light, the light throughput is increased, thus improving imaging performance in low-light environments.

[0091] The sixth lens has positive optical power. Both its first and second sides are convex. Setting the sixth lens to positive optical power and designing its first side as convex to match the convexity of the second side of the fourth lens helps balance aberrations. The convex design of the second side further converges light rays to the image center, reducing the rear aperture.

[0092] The sixth lens has positive optical power. Its first side is convex, and its second side is concave. Setting the sixth lens to positive optical power allows it to converge light. The convex first side receives incoming light, while the concave second side acts as a transition, smoothing the path of light entering the seventh lens and improving the lens's resolving power.

[0093] The seventh lens has positive optical power, and both its first and second sides are convex. By designing the seventh lens to have positive optical power and employing a biconvex structure, it is beneficial to further converge the light from the front end, allowing the light to smoothly enter the rear optical system and achieving a small aperture.

[0094] The seventh lens has negative optical power. The first side of the seventh lens is concave, and the second side is convex. By designing the seventh lens to have negative optical power and a meniscus structure convex to the second side, the seventh lens can receive the light emitted from the sixth lens and help the light diffuse outward, thereby expanding the imaging range.

[0095] The seventh lens has negative optical power, and both its first and second sides are concave. By designing the seventh lens to have negative optical power and a double-concave structure, and combining it with the double-convex sixth lens, not only is there lossless transition light, but the combination of positive and negative optical power also helps to correct aberrations between edge and center rays, achieving high resolution.

[0096] The seventh lens has negative optical power. Its first side is convex, and its second side is concave. By setting the seventh lens to negative optical power, making its first side convex to converge light rays, and its second side concave to diverge light rays, the lens helps the light rays accumulate rapidly on the image plane, thus expanding the imaging range.

[0097] The eighth lens has negative optical power. Both its first and second sides are concave. Designing the eighth lens to have negative optical power and a concave first side helps collect light rays entering through the seventh lens, while the concave second side helps to regulate peripheral aberrations, thereby improving the lens's resolving power.

[0098] The eighth lens has negative optical power. The first side of the eighth lens is convex, and the second side is concave. Designing the eighth lens as having negative optical power can further diverge light. Designing the first side as convex helps to receive the incident light from the seventh lens, and designing the second side as concave helps to increase light throughput and improve the imaging quality of the optical lens in low-light environments. Attached Figure Description

[0099] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0100] Figure 1 A schematic diagram of the optical lens structure of Example 1 of the present invention is shown;

[0101] Figure 2 A schematic diagram of the optical lens structure of Example 2 of the present invention is shown;

[0102] Figure 3 A schematic diagram of the optical lens structure of Example 3 of the present invention is shown;

[0103] Figure 4 A schematic diagram of the optical lens structure of Example 4 of the present invention is shown;

[0104] Figure 5 A schematic diagram of the optical lens structure of Example 5 of the present invention is shown;

[0105] Figure 6 A schematic diagram of the optical lens structure of Example Six of the present invention is shown;

[0106] Figure 7 A schematic diagram of the optical lens structure of Example Seven of the present invention is shown;

[0107] Figure 8 A schematic diagram of the optical lens structure of Example 8 of the present invention is shown;

[0108] Figure 9 A schematic diagram of the optical lens structure of Example Nine of the present invention is shown;

[0109] Figure 10 A schematic diagram of the optical lens structure of Example 10 of the present invention is shown;

[0110] Figure 11 A schematic diagram of the optical lens structure of Example Eleven of the present invention is shown;

[0111] Figure 12 A schematic diagram of the optical lens structure of Example Twelve of the present invention is shown. Detailed Implementation

[0112] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0113] 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 one of ordinary skill in the art to which this application pertains.

[0114] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0115] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0116] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0117] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the first side surface of the lens, and the surface of each lens closest to the image side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0118] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0119] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0120] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitting 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. The imaging surface of the optical lens is the image source surface.

[0121] To address at least one of the following problems in existing optical lenses: low light transmission, inability to simultaneously achieve high resolution and small aperture, and limitations in lens design due to miniaturization, resulting in an inadequate balance between high sensitivity and aberrations, this invention provides an optical lens and an electronic device.

[0122] Example 1

[0123] like Figures 1 to 12 As shown, 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 its first side surface 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 have opposite surface shapes. The third lens has positive optical power, and its first side surface is concave, and its second side surface is convex. The fourth lens has negative optical power, and its first side surface is concave, and its second side surface is convex. The fifth lens has positive optical power, and its second side surface is convex. The sixth lens has optical power, and its first side surface is convex. The seventh lens has optical power. The eighth lens has negative optical power, and its second side surface is concave.

[0124] Optionally, the first lens has positive optical power, converging light. Simultaneously, the first side surface of the first lens is convex, facilitating the collection of light over a wide area, allowing a large amount of light to enter the optical lens, thus improving the lens's light transmission and illumination. Making the second side surface of the first lens concave allows for a smaller lens size to meet manufacturing requirements and reduces costs. Furthermore, the concave surface's control over light transmission prevents excessive sensitivity to light transitioning to the rear, contributing to improved resolution. Using a high-refractive-index material for the first lens helps to converge light at the front end, reducing the front aperture.

[0125] Optionally, the first lens has positive optical power, and both its first and second sides are convex. This helps to concentrate light rays exiting the first lens more effectively at the second side, limiting the height of the light rays and thus reducing the aperture of the optical lens, which is beneficial for achieving a small-aperture, miniaturized design. Simultaneously, using spherical glass for the first lens allows for the addition of a waterproof coating while reducing manufacturing costs.

[0126] Optionally, the second lens has negative optical power, a first convex surface, and a second concave surface. Setting the second lens to negative optical power and having a convex first surface facilitates a smooth transition of light from the front end. The concave design of the second side allows the light converged on the first side to be released, filling the entrance pupil as much as possible and improving the target surface illumination.

[0127] Optionally, the second lens has negative optical power, with a concave first side and a convex second side. By setting the second lens to negative optical power and designing its first side as concave to match the convex second side of the first lens, the light path becomes smoother. Simultaneously, setting the second side as convex perfectly receives the light, reducing the sensitivity of the optical lens.

[0128] Optionally, the second lens has positive optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is concave. The second lens's positive optical power and its meniscus shape convex towards the first side compress light rays, reducing the rear aperture and achieving miniaturization.

[0129] Optionally, the third lens has positive optical power, with its first side being concave and its second side being convex. Designing the third lens to have positive optical power and using a concave first side allows for better reception of light passing through the aperture, providing sufficient space for aberration adjustment in the subsequent optical system. Designing the second side convex ensures that the third and fourth lenses have similar light paths, reducing light loss due to inter-lens reflections, improving relative illumination, and minimizing field curvature to correct off-axis aberrations.

[0130] Optionally, the fourth lens has negative optical power, the first side of the fourth lens is concave, and the second side of the fourth lens is convex. The fourth lens adopts negative optical power, and the first side of the fourth lens is concave in order to better receive the light incident through the third lens. The second side of the fourth lens is designed to be convex to change the light path. At the same time, as a negative film of the cemented part, the material properties of the fourth lens also play a crucial role in correcting aberrations such as chromatic aberration.

[0131] Optionally, the fifth lens has positive optical power, and both its first and second sides are convex. The fifth lens employs positive optical power, and the convex first side helps to gather light from the front optical system and limit the rear aperture. As a crucial lens connecting the front and rear lens groups, a smaller aperture reduces the impact of large aberrations caused by edge field of view rays, improving the sensitivity and optical performance of the lens. Designing the second side of the fifth lens as convex optimizes the rear aperture size, while maintaining the sensitivity of light transmitted from the first side, thus contributing to reduced sensitivity.

[0132] Optionally, the fifth lens has positive optical power, a concave first side surface, and a convex second side surface. By employing positive optical power and setting the first side surface to be concave to receive upward-facing rays, the light trajectory of the fifth lens remains relatively unchanged, thus optimizing its sensitivity. The convex second side surface alters the light trajectory, allowing the light to transition smoothly backward.

[0133] Optionally, the sixth lens has negative optical power, a first convex surface, and a second concave surface. Setting the sixth lens to negative optical power, having a convex first surface to converge light from the front end, and designing a concave second surface to diverge light, increases light throughput and improves imaging performance in low-light environments.

[0134] Optionally, the sixth lens has positive optical power, and both its first and second sides are convex. Setting the sixth lens to positive optical power and designing its first side as convex to be symmetrical with the convexity of the second side of the fourth lens helps balance aberrations. The convex design of the second side further converges light rays to the image center, reducing the rear aperture.

[0135] Optionally, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave. Setting the sixth lens to positive optical power allows for the convergence of light rays. The first side surface of the sixth lens is convex to receive the light rays from the front end, and the second side surface of the sixth lens is concave to act as a transition, making the light rays entering the seventh lens smoother and improving the resolving power of the optical lens.

[0136] Optionally, the seventh lens has positive optical power, and both its first and second sides are convex. By designing the seventh lens to have positive optical power and employing a biconvex structure, it is beneficial to further converge the front-end light, allowing the light to smoothly enter the rear optical system and achieving a small aperture.

[0137] Optionally, the seventh lens has negative optical power, a concave first side surface, and a convex second side surface. By designing the seventh lens to have negative optical power and a meniscus structure convex to the second side, the seventh lens can receive the light emitted from the sixth lens and facilitate the outward diffusion of light to expand the imaging range.

[0138] Optionally, the seventh lens has negative optical power, and both its first and second sides are concave. By designing the seventh lens to have negative optical power and a double-concave structure, and combining it with the double-convex sixth lens, not only is there lossless transition light, but the combination of positive and negative optical power also helps to correct aberrations between edge and center rays, thus achieving high resolution.

[0139] Optionally, the seventh lens has negative optical power, a first convex surface, and a second concave surface. Setting the seventh lens to negative optical power, making the first convex surface to converge light rays, and making the second concave surface to diverge light rays helps to rapidly accumulate light rays on the image plane, thus expanding the imaging range.

[0140] Optionally, the eighth lens has negative optical power, and both its first and second sides are concave. Designing the eighth lens to have negative optical power and its first side to be concave helps to collect light entering through the seventh lens, while designing the second side to be concave helps to control peripheral light aberrations, thereby improving the resolving power of the optical lens.

[0141] Optionally, the eighth lens has negative optical power, a first convex surface, and a second concave surface. Designing the eighth lens to have negative optical power further diverges light, designing the first convex surface helps to receive the incident light from the seventh lens, and designing the second concave surface helps to increase light throughput and improve the imaging quality of the optical lens in low-light environments.

[0142] In this embodiment, the optical lens further includes an aperture stop, which is located between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, the light entering the optical lens is concentrated, reducing the aperture of the optical system behind the optical lens, thereby reducing the assembly sensitivity of the optical lens.

[0143] In this embodiment, the third and fourth lenses are cemented lenses, as are the sixth and seventh lenses. Using the third and fourth lenses, which have opposite optical powers, as cemented lenses facilitates a smoother transition of light to the rear optical system. The cemented nature of the sixth and seventh lenses allows for a gentler transition of light from the front lens to the rear optical system, reducing the overall optical length of the lens and enabling sufficient correction of various aberrations. This, combined with a compact structure, improves the lens's resolution and optimizes optical performance such as distortion and CRA.

[0144] Designing the third and fourth lenses, as well as the sixth and seventh lenses, as cemented lenses reduces the air gap between them, decreasing the overall length of the optical lens and facilitating miniaturization. It also reduces the number of assembly components for the two lenses, simplifying manufacturing processes and lowering costs. The complementary dispersion of the two lenses helps reduce chromatic aberration and further reduces field curvature, corrects off-axis point aberrations, and improves image quality. Properly allocating the focal length also helps achieve thermal compensation, resulting in good temperature performance.

[0145] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the condition R15 / F ≥ 0.3 with respect to the overall focal length F of the optical lens. Ensuring a positive radius of curvature on the second side surface of the eighth lens, while keeping the overall focal length F fixed, effectively adjusts the rear light rays, balances aberrations, and improves the resolution of the optical lens. Preferably, R15 / F ≥ 0.5.

[0146] In this embodiment, the sum of the center thicknesses of the sixth and seventh lenses, d67, and the total length (TTL) of the optical lens satisfy the following condition: d67 / TTL ≤ 0.3. When the TTLs are similar, a smaller sum of the center thicknesses of the sixth and seventh lenses has a greater limiting effect on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture effect. Simultaneously, limiting the thickness of the cemented lens also plays an important role in controlling cost. Preferably, d67 / TTL ≤ 0.26.

[0147] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view satisfy the following relationship: (F*θ) / D≥0.3. When the field of view is constant, a smaller maximum aperture of the first side of the first lens is more advantageous for reducing the front aperture of the optical lens and thus reducing its volume. Preferably, (F*θ) / D≥0.5.

[0148] In this embodiment, the overall 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 setting, when the image height is the same, is beneficial for achieving long focal length and wide-angle resolution. Preferably, (FOV×F) / H≥50.

[0149] In this embodiment, the total length (TTL) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: TTL / F ≤ 3. When the focal lengths are similar, a smaller TTL means a smaller optical lens size, which is beneficial for miniaturization. Preferably, TTL / F ≤ 2.5.

[0150] In this embodiment, the total 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 condition: TTL / H / FOV ≤ 0.5. Under the same imaging plane and image height, the length of the optical lens can be effectively limited, which is beneficial for miniaturization of the optical lens. TTL / H / FOV ≤ 0.3.

[0151] In this embodiment, the ratio of the total focal length F of the optical lens to the image height H corresponding to the maximum field of view of the optical lens satisfies the condition: 0.5 ≤ F / H ≤ 3. Controlling the ratio of the total focal length F to the image height within a reasonable range is beneficial for improving the resolving power of the optical lens. Preferably, 1 ≤ F / H ≤ 2.5.

[0152] 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 aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture 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. By limiting the curvature and maximum effective aperture of the first lens, the above relationship is ensured to be within a certain range, which can effectively limit the height of the edge light entering the optical lens, further achieving a small aperture. Preferably, -0.5≤(R1 / D) / (R2 / D2)≤0.7.

[0153] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the condition: -6.5 ≤ R9 / R10 ≤ 7. Controlling the radius of curvature of the fifth lens within a reasonable range can reduce the deviation of the incident angle of light from different fields of view, which is beneficial for a smooth transition of light and thus reduces the sensitivity of the optical lens. Preferably, -4 ≤ R9 / R10 ≤ 6.5.

[0154] In this embodiment, the overall focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.05. This ensures that, while maintaining the same field of view and imaging plane size, increasing the focal length of the optical lens enhances the imaging effect in the central region of the imaging plane and reduces the influence of target surface distortion. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0155] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 2. This setting is beneficial for increasing the entrance pupil diameter, increasing the amount of light transmitted, improving relative illumination, and enhancing imaging capabilities in low-light environments. Preferably, F / ENPD ≤ 1.8.

[0156] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view, the total 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. Under the condition that the total focal length of the optical lens is fixed, the optical lens has the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.15.

[0157] In this embodiment, the radius of curvature R10 of the second side of the fifth lens and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view satisfy the following ratio: R10 / D9 ≥ -7. Reasonably setting the ratio of the radius of curvature of the fifth lens to the maximum effective aperture helps to reduce the height of light entering the fifth lens, achieving a small aperture while also considering lens manufacturability. Preferably, R10 / D9 ≥ -4.

[0158] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the condition R10 / F ≥ -3.5 with respect to the overall focal length F of the optical lens. With a fixed focal length, controlling the radius of curvature of the second side surface of the fifth lens can effectively reduce the height of the light source and decrease the aperture of the rear optical system. Preferably, R10 / F ≥ -2.5.

[0159] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the condition R15 / TTL > 0.001 with the total optical length TTL of the optical lens remaining constant. Controlling the radius of curvature of the second side surface of the eighth lens reduces ghosting between the eighth lens and the filter and protective glass, thus improving image quality. Preferably, R15 / TTL ≥ 0.2.

[0160] In this embodiment, the optical back focal length (BFL) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: BFL / F ≤ 0.54. By limiting the ratio of BFL to F, miniaturization is achieved, and the optical path difference between peripheral and central rays is reduced by limiting the back focal length, thereby reducing aberrations and improving resolution. Preferably, BFL / F ≤ 0.41.

[0161] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the condition R15 / BFL ≥ 0.5 with the optical back focal length of the optical lens. Ghosting images are easily generated between the second side surface of the eighth lens and the filter and protective glass. Controlling the second side surface of the eighth lens to be concave can effectively reduce or even avoid ghosting images. Furthermore, by controlling the optical back focal length, the resolving power of the optical lens can be significantly improved. Preferably, R15 / BFL ≥ 2.

[0162] Example 2

[0163] like Figures 1 to 12 As shown, 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; the second lens has positive optical power; the third lens has positive optical power; the fourth lens has negative optical power; the fifth lens has positive optical power; the sixth lens has positive optical power; the seventh lens has positive optical power; and the eighth lens has negative optical power. The radius of curvature R15 of the second side of the eighth lens satisfies the following relationship with the overall focal length F of the optical lens: R15 / F ≥ 0.3. With the overall focal length F of the optical lens fixed, ensuring that the radius of curvature of the second side 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.

[0164] Optionally, the first lens has positive optical power, converging light. Simultaneously, the first side surface of the first lens is convex, facilitating the collection of light over a wide area, allowing a large amount of light to enter the optical lens, thus improving the lens's light transmission and illumination. Making the second side surface of the first lens concave allows for a smaller lens size to meet manufacturing requirements and reduces costs. Furthermore, the concave surface's control over light transmission prevents excessive sensitivity to light transitioning to the rear, contributing to improved resolution. Using a high-refractive-index material for the first lens helps to converge light at the front end, reducing the front aperture.

[0165] Optionally, the first lens has positive optical power, and both its first and second sides are convex. This helps to concentrate light rays exiting the first lens more effectively at the second side, limiting the height of the light rays and thus reducing the aperture of the optical lens, which is beneficial for achieving a small-aperture, miniaturized design. Simultaneously, using spherical glass for the first lens allows for the addition of a waterproof coating while reducing manufacturing costs.

[0166] Optionally, the second lens has negative optical power, a first convex surface, and a second concave surface. Setting the second lens to negative optical power and having a convex first surface facilitates a smooth transition of light from the front end. The concave design of the second side allows the light converged on the first side to be released, filling the entrance pupil as much as possible and improving the target surface illumination.

[0167] Optionally, the second lens has negative optical power, with a concave first side and a convex second side. By setting the second lens to negative optical power and designing its first side as concave to match the convex second side of the first lens, the light path becomes smoother. Simultaneously, setting the second side as convex perfectly receives the light, reducing the sensitivity of the optical lens.

[0168] Optionally, the second lens has positive optical power, a first side surface of the second lens is convex, and a second side surface of the second lens is concave. The second lens's positive optical power and its meniscus shape convex towards the first side compress light rays, reducing the rear aperture and achieving miniaturization.

[0169] Optionally, the third lens has positive optical power, with its first side being concave and its second side being convex. Designing the third lens to have positive optical power and using a concave first side allows for better reception of light passing through the aperture, providing sufficient space for aberration adjustment in the subsequent optical system. Designing the second side convex ensures that the third and fourth lenses have similar light paths, reducing light loss due to inter-lens reflections, improving relative illumination, and minimizing field curvature to correct off-axis aberrations.

[0170] Optionally, the fourth lens has negative optical power, the first side of the fourth lens is concave, and the second side of the fourth lens is convex. The fourth lens adopts negative optical power, and the first side of the fourth lens is concave in order to better receive the light incident through the third lens. The second side of the fourth lens is designed to be convex to change the light path. At the same time, as a negative film of the cemented part, the material properties of the fourth lens also play a crucial role in correcting aberrations such as chromatic aberration.

[0171] Optionally, the fifth lens has positive optical power, and both its first and second sides are convex. The fifth lens employs positive optical power, and the convex first side helps to gather light from the front optical system and limit the rear aperture. As a crucial lens connecting the front and rear lens groups, a smaller aperture reduces the impact of large aberrations caused by edge field of view rays, improving the sensitivity and optical performance of the lens. Designing the second side of the fifth lens as convex optimizes the rear aperture size, while maintaining the sensitivity of light transmitted from the first side, thus contributing to reduced sensitivity.

[0172] Optionally, the fifth lens has positive optical power, a concave first side surface, and a convex second side surface. By employing positive optical power and setting the first side surface to be concave to receive upward-facing rays, the light trajectory of the fifth lens remains relatively unchanged, thus optimizing its sensitivity. The convex second side surface alters the light trajectory, allowing the light to transition smoothly backward.

[0173] Optionally, the sixth lens has negative optical power, a first convex surface, and a second concave surface. Setting the sixth lens to negative optical power, having a convex first surface to converge light from the front end, and designing a concave second surface to diverge light, increases light throughput and improves imaging performance in low-light environments.

[0174] Optionally, the sixth lens has positive optical power, and both its first and second sides are convex. Setting the sixth lens to positive optical power and designing its first side as convex to be symmetrical with the convexity of the second side of the fourth lens helps balance aberrations. The convex design of the second side further converges light rays to the image center, reducing the rear aperture.

[0175] Optionally, the sixth lens has positive optical power, a first side surface of the sixth lens is convex, and a second side surface of the sixth lens is concave. Setting the sixth lens to positive optical power allows for the convergence of light rays. The first side surface of the sixth lens is convex to receive the light rays from the front end, and the second side surface of the sixth lens is concave to act as a transition, making the light rays entering the seventh lens smoother and improving the resolving power of the optical lens.

[0176] Optionally, the seventh lens has positive optical power, and both its first and second sides are convex. By designing the seventh lens to have positive optical power and employing a biconvex structure, it is beneficial to further converge the front-end light, allowing the light to smoothly enter the rear optical system and achieving a small aperture.

[0177] Optionally, the seventh lens has negative optical power, a concave first side surface, and a convex second side surface. By designing the seventh lens to have negative optical power and a meniscus structure convex to the second side, the seventh lens can receive the light emitted from the sixth lens and facilitate the outward diffusion of light to expand the imaging range.

[0178] Optionally, the seventh lens has negative optical power, and both its first and second sides are concave. By designing the seventh lens to have negative optical power and a double-concave structure, and combining it with the double-convex sixth lens, not only is there lossless transition light, but the combination of positive and negative optical power also helps to correct aberrations between edge and center rays, thus achieving high resolution.

[0179] Optionally, the seventh lens has negative optical power, a first convex surface, and a second concave surface. Setting the seventh lens to negative optical power, making the first convex surface to converge light rays, and making the second concave surface to diverge light rays helps to rapidly accumulate light rays on the image plane, thus expanding the imaging range.

[0180] Optionally, the eighth lens has negative optical power, and both its first and second sides are concave. Designing the eighth lens to have negative optical power and its first side to be concave helps to collect light entering through the seventh lens, while designing the second side to be concave helps to control peripheral light aberrations, thereby improving the resolving power of the optical lens.

[0181] Optionally, the eighth lens has negative optical power, a first convex surface, and a second concave surface. Designing the eighth lens to have negative optical power further diverges light, designing the first convex surface helps to receive the incident light from the seventh lens, and designing the second concave surface helps to increase light throughput and improve the imaging quality of the optical lens in low-light environments.

[0182] In this embodiment, the optical lens further includes an aperture stop, which is located between the second lens and the third lens. By placing the aperture stop between the second lens and the third lens, the light entering the optical lens is concentrated, reducing the aperture of the optical system behind the optical lens, thereby reducing the assembly sensitivity of the optical lens.

[0183] In this embodiment, the third and fourth lenses are cemented lenses, as are the sixth and seventh lenses. Using the third and fourth lenses, which have opposite optical powers, as cemented lenses facilitates a smoother transition of light to the rear optical system. The cemented nature of the sixth and seventh lenses allows for a gentler transition of light from the front lens to the rear optical system, reducing the overall optical length of the lens and enabling sufficient correction of various aberrations. This, combined with a compact structure, improves the lens's resolution and optimizes optical performance such as distortion and CRA.

[0184] Designing the third and fourth lenses, as well as the sixth and seventh lenses, as cemented lenses reduces the air gap between them, decreasing the overall length of the optical lens and facilitating miniaturization. It also reduces the number of assembly components for the two lenses, simplifying manufacturing processes and lowering costs. The complementary dispersion of the two lenses helps reduce chromatic aberration and further reduces field curvature, corrects off-axis point aberrations, and improves image quality. Properly allocating the focal length also helps achieve thermal compensation, resulting in good temperature performance.

[0185] In this embodiment, the sum of the center thicknesses of the sixth and seventh lenses, d67, and the total length (TTL) of the optical lens satisfy the following condition: d67 / TTL ≤ 0.3. When the TTLs are similar, a smaller sum of the center thicknesses of the sixth and seventh lenses has a greater limiting effect on the aperture of the rear optical system, thereby reducing the aperture of the rear optical system and achieving a small aperture effect. Simultaneously, limiting the thickness of the cemented lens also plays an important role in controlling cost. Preferably, d67 / TTL ≤ 0.26.

[0186] In this embodiment, the overall focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view satisfy the following relationship: (F*θ) / D≥0.3. When the field of view is constant, a smaller maximum aperture of the first side of the first lens is more advantageous for reducing the front aperture of the optical lens and thus reducing its volume. Preferably, (F*θ) / D≥0.5.

[0187] In this embodiment, the overall 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 setting, when the image height is the same, is beneficial for achieving long focal length and wide-angle resolution. Preferably, (FOV×F) / H≥50.

[0188] In this embodiment, the total length (TTL) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: TTL / F ≤ 3. When the focal lengths are similar, a smaller TTL means a smaller optical lens size, which is beneficial for miniaturization. Preferably, TTL / F ≤ 2.5.

[0189] In this embodiment, the total 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 condition: TTL / H / FOV ≤ 0.5. Under the same imaging plane and image height, the length of the optical lens can be effectively limited, which is beneficial for miniaturization of the optical lens. TTL / H / FOV ≤ 0.3.

[0190] In this embodiment, the ratio of the total focal length F of the optical lens to the image height H corresponding to the maximum field of view of the optical lens satisfies the condition: 0.5 ≤ F / H ≤ 3. Controlling the ratio of the total focal length F to the image height within a reasonable range is beneficial for improving the resolving power of the optical lens. Preferably, 1 ≤ F / H ≤ 2.5.

[0191] 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 aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture 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. By limiting the curvature and maximum effective aperture of the first lens, the above relationship is ensured to be within a certain range, which can effectively limit the height of the edge light entering the optical lens, further achieving a small aperture. Preferably, -0.5≤(R1 / D) / (R2 / D2)≤0.7.

[0192] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the condition: -6.5 ≤ R9 / R10 ≤ 7. Controlling the radius of curvature of the fifth lens within a reasonable range can reduce the deviation of the incident angle of light from different fields of view, which is beneficial for a smooth transition of light and thus reduces the sensitivity of the optical lens. Preferably, -4 ≤ R9 / R10 ≤ 6.5.

[0193] In this embodiment, the overall focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.05. This ensures that, while maintaining the same field of view and imaging plane size, increasing the focal length of the optical lens enhances the imaging effect in the central region of the imaging plane and reduces the influence of target surface distortion. Preferably, |(HF*θ) / (F*θ)|≤0.04.

[0194] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the condition: F / ENPD ≤ 2. Under the condition that the overall focal length of the optical lens is fixed, the optical lens has the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.15.

[0195] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view, the total 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. Under the condition that the total focal length of the optical lens is fixed, the optical lens has the characteristics of a large target surface and a small aperture. Preferably, D / H / F ≤ 0.15.

[0196] In this embodiment, the radius of curvature R10 of the second side of the fifth lens and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view satisfy the following ratio: R10 / D9 ≥ -7. Reasonably setting the ratio of the radius of curvature of the fifth lens to the maximum effective aperture helps to reduce the height of light entering the fifth lens, achieving a small aperture while also considering lens manufacturability. Preferably, R10 / D9 ≥ -4.

[0197] In this embodiment, the radius of curvature R10 of the second side surface of the fifth lens satisfies the condition R10 / F ≥ -3.5 with respect to the overall focal length F of the optical lens. With a fixed focal length, controlling the radius of curvature of the second side surface of the fifth lens can effectively reduce the height of the light source and decrease the aperture of the rear optical system. Preferably, R10 / F ≥ -2.5.

[0198] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the condition R15 / TTL > 0.001 with the total optical length TTL of the optical lens remaining constant. Controlling the radius of curvature of the second side surface of the eighth lens reduces ghosting between the eighth lens and the filter and protective glass, thus improving image quality. Preferably, R15 / TTL ≥ 0.2.

[0199] In this embodiment, the optical back focal length (BFL) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: BFL / F ≤ 0.54. By limiting the ratio of BFL to F, miniaturization is achieved, and the optical path difference between peripheral and central rays is reduced by limiting the back focal length, thereby reducing aberrations and improving resolution. Preferably, BFL / F ≤ 0.41.

[0200] In this embodiment, the radius of curvature R15 of the second side surface of the eighth lens satisfies the condition R15 / BFL ≥ 0.5 with the optical back focal length of the optical lens. Ghosting images are easily generated between the second side surface of the eighth lens and the filter and protective glass. Controlling the second side surface of the eighth lens to be concave can effectively reduce or even avoid ghosting images. Furthermore, by controlling the optical back focal length, the resolving power of the optical lens can be significantly improved. Preferably, R15 / BFL ≥ 2.

[0201] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0202] In the aforementioned optical lenses, the maximum field of view (FOV) and height (H) are related, using the field of view corresponding to the image height. The total optical length (TTL) of the optical lens refers to the distance along the optical axis from the first side surface of the first lens to the imaging plane of the optical lens.

[0203] The optical lens in this application may employ multiple lenses, such as the eight lenses described above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Specifically, when the imaging quality of the optical lens is the primary concern, all eight lenses may be aspherical lenses.

[0204] In an exemplary embodiment, the first to eighth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift of the back focus of the optical lens due to temperature changes, thereby improving system stability. At the same time, using glass can avoid lens blurring caused by high and low temperature changes in the operating environment, which would affect the normal use of the lens. For example, an all-glass optical lens has a wider temperature range and can maintain stable optical performance within the range of -40°C to 105°C.

[0205] Specifically, when image resolution and reliability are paramount, the first through eighth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first through eighth lenses in an optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first through eighth lenses in an optical lens can also be made from a combination of plastic and glass.

[0206] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0207] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although an embodiment is described using eight lenses as an example, the optical lens is not limited to including eight lenses. The optical lens may include other numbers of lenses if desired.

[0208] The following description, with reference to the accompanying drawings, further illustrates examples of specific surface shapes and parameters of optical lenses applicable to the above embodiments.

[0209] Example 1

[0210] like Figure 1 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0211] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0212] In this example, the focal length F of the optical lens is 15.3688mm, the total length TTL of the optical lens is 32.5552mm, and the maximum field of view FOV of the optical lens is 34.3857°.

[0213] In this example, the third and fourth lenses 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 and seventh lenses 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 sides, even with 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.

[0214] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0215] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0216]

[0217]

[0218] Table 1

[0219] Example 2

[0220] like Figure 2 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0221] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0222] In this example, the focal length F of the optical lens is 15.6134mm, the total length TTL of the optical lens is 32.9843mm, and the maximum field of view FOV of the optical lens is 34.2065°.

[0223] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0224] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0225] Table 2 shows the basic structural parameters of the optical lens in Example 2, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0226]

[0227]

[0228] Table 2

[0229] Example 3

[0230] like Figure 3 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0231] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0232] In this example, the focal length F of the optical lens is 15.4469mm, the total length TTL of the optical lens is 32.4494mm, and the maximum field of view FOV of the optical lens is 34.4283°.

[0233] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0234] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0235] Table 3 shows the basic structural parameters of the optical lens in Example 3, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0236] Surf Radius Thickness Nd Vd 1 12.5000 2.6000 1.80 46.57 2 25.7000 0.1000 3 7.6000 1.2000 1.85 23.78 4 5.9000 1.5000 STO Infinity 2.0000 6 -10.9000 4.3000 1.69 54.82 7 -6.1000 1.6000 1.91 35.25 8 -13.0550 0.1000 9 16.0000 4.3000 1.57 71.30 10 -18.0000 0.8000 11 30.0000 3.2500 1.69 31.16 12 9.1000 4.9000 1.70 55.53 13 -30.0000 1.2000 14 -9.5000 0.9000 1.49 70.44 15 18.6000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.6744 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0237] Table 3

[0238] Example 4

[0239] like Figure 4 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0240] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has negative optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0241] In this example, the focal length F of the optical lens is 15.4545mm, the total length TTL of the optical lens is 32.3781mm, and the maximum field of view FOV of the optical lens is 34.4446°.

[0242] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0243] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0244] Table 4 shows the basic structural parameters of the optical lens in Example 4, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0245] Surf Radius Thickness Nd Vd 1 12.6000 2.6000 1.80 46.57 2 24.7000 0.1000 3 7.6000 1.1000 1.85 23.78 4 6.0000 1.5000 STO Infinity 1.8000 6 -11.6000 4.3000 1.69 54.82 7 -6.3000 2.0000 1.91 35.25 8 -13.6560 0.1000 9 14.6000 4.2000 1.57 71.30 10 -21.7000 0.8000 11 32.9000 2.5000 1.69 31.16 12 9.3000 5.0000 1.70 55.53 13 -33.2000 1.7500 14 -9.0000 0.9000 1.49 70.44 15 23.9000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.7031 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0246] Table 4

[0247] Example 5

[0248] like Figure 5 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0249] 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 optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0250] In this example, the focal length F of the optical lens is 15.3972mm, the total length TTL of the optical lens is 32.5937mm, and the maximum field of view FOV of the optical lens is 34.3828°.

[0251] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0252] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0253] Table 5 shows the basic structural parameters of the optical lens in Example 5, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0254] Surf Radius Thickness Nd Vd 1 23.0000 2.7000 1.80 46.57 2 -63.0000 1.3000 3 -23.0000 1.5000 1.85 23.78 4 -43.0000 0.1000 STO Infinity 3.0000 6 -15.7000 4.6000 1.69 54.82 7 -7.5000 2.5000 1.91 35.25 8 -13.5220 2.4300 9 25.0000 3.7000 1.57 71.30 10 -25.0000 0.1000 11 13.8000 3.0000 1.70 55.53 12 -15.4000 1.8000 1.69 31.16 13 23.0000 1.1000 14 -18.0000 0.9000 1.49 70.44 15 11.7000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8387 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0255] Table 5

[0256] Example 6

[0257] like Figure 6 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0258] 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 optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0259] In this example, the focal length F of the optical lens is 15.3928mm, the total length TTL of the optical lens is 32.4082mm, and the maximum field of view FOV of the optical lens is 34.3825°.

[0260] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0261] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0262] Table 6 shows the basic structural parameters of the optical lens in Example 6, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0263] Surf Radius Thickness Nd Vd 1 23.0000 2.7000 1.80 46.57 2 -63.0000 1.3000 3 -23.0000 1.5000 1.85 23.78 4 -43.0000 0.1000 STO Infinity 3.0000 6 -15.6000 4.5000 1.69 54.82 7 -7.5000 2.5000 1.91 35.25 8 -13.4550 2.4000 9 25.0000 3.6000 1.57 71.30 10 -25.3000 0.1000 11 13.8000 3.0000 1.70 55.53 12 -15.2000 1.8000 1.69 31.16 13 23.0000 1.1000 14 -18.0000 0.9000 1.49 70.44 15 11.8000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8832 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0264] Table 6

[0265] Example 7

[0266] like Figure 7As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0267] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0268] In this example, the focal length F of the optical lens is 15.6091mm, the total length TTL of the optical lens is 32.6947mm, and the maximum field of view FOV of the optical lens is 34.504°.

[0269] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0270] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0271] Table 7 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0272]

[0273]

[0274] Table 7

[0275] Example 8

[0276] like Figure 8 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0277] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0278] In this example, the focal length F of the optical lens is 15.5795mm, the total length TTL of the optical lens is 32.6957mm, and the maximum field of view FOV of the optical lens is 34.5281°.

[0279] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0280] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0281] Table 8 shows the basic structural parameters of the optical lens in Example 8, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0282]

[0283]

[0284] Table 8

[0285] Example 9

[0286] like Figure 9 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0287] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has negative optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 has negative optical power. Its first side surface S14 is convex, and its second side surface S15 is concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0288] In this example, the focal length F of the optical lens is 15.8227mm, the total length TTL of the optical lens is 32.4859mm, and the maximum field of view FOV of the optical lens is 34.7606°.

[0289] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0290] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0291] Table 9 shows the basic structural parameters of the optical lens in Example 9, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0292]

[0293]

[0294] Table 9

[0295] Example 10

[0296] like Figure 10 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0297] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is concave, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is concave. The seventh lens L7 has negative optical power, its first side surface S12 is convex, and its second side surface S13 is concave. The eighth lens L8 has negative optical power. Its first side surface S14 is convex, and its second side surface S15 is concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0298] In this example, the focal length F of the optical lens is 15.7761mm, the total length TTL of the optical lens is 32.4613mm, and the maximum field of view FOV of the optical lens is 34.7494°.

[0299] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0300] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0301] Table 10 shows the basic structural parameters of the optical lens in Example 10, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0302] Surf Radius Thickness Nd Vd 1 11.8000 3.0000 1.80 46.57 2 25.6000 0.1000 3 7.5000 2.8000 1.85 23.78 4 4.5000 1.4000 STO Infinity 1.5000 6 -12.2000 2.9000 1.69 54.82 7 -4.1000 0.9000 1.91 35.25 8 -12.5370 0.3000 9 -41.5000 4.3000 1.57 71.30 10 -7.7000 1.3000 11 13.2000 3.4000 1.70 55.53 12 95.0000 5.0000 1.69 31.16 13 33.0000 0.8000 14 50.0000 0.9000 1.49 70.44 15 15.2000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8363 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0303] Table 10

[0304] Example 11

[0305] like Figure 11 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0306] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0307] In this example, the focal length F of the optical lens is 15.4241mm, the total length TTL of the optical lens is 32.5177mm, and the maximum field of view FOV of the optical lens is 34.4236°.

[0308] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0309] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0310] Table 11 shows the basic structural parameters of the optical lens in Example 11, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0311] Surf Radius Thickness Nd Vd 1 21.6000 2.3000 1.80 46.57 2 87.0000 0.1000 3 30.7000 1.5000 1.85 23.78 4 36.0000 0.4000 STO Infinity 2.2000 6 -11.3000 3.0000 1.69 54.82 7 -7.2000 4.0000 1.91 35.25 8 -12.8270 0.1000 9 26.0000 3.5000 1.57 71.30 10 -30.0000 0.1000 11 23.0000 3.2000 1.70 55.53 12 -10.0000 5.0000 1.69 31.16 13 54.0000 1.0000 14 -13.0000 2.3000 1.49 70.44 15 33.0000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.7927 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0312] Table 11

[0313] Example 12

[0314] like Figure 12 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, an aperture stop 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.

[0315] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 has positive optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S6 is concave, and its second side surface S7 is convex. The fourth lens L4 has negative optical power, its first side surface S7 is concave, and its second side surface S8 is convex. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 has positive optical power, its first side surface S11 is convex, and its second side surface S12 is convex. The seventh lens L7 has negative optical power, its first side surface S12 is concave, and its second side surface S13 is concave. The eighth lens L8 has negative optical power. The first side surface S14 of the eighth lens is concave, and the second side surface S15 of the eighth lens is also concave. The filter has a first side surface S16 and a second side surface S17, and the protective glass has a first side surface S18 and a second side surface S19. Light from the object passes sequentially through surfaces S1 to S19 and is finally imaged onto the imaging plane IMA.

[0316] In this example, the focal length F of the optical lens is 15.4144mm, the total length TTL of the optical lens is 32.5676mm, and the maximum field of view FOV of the optical lens is 34.4262°.

[0317] In this example, the third and fourth lenses are cemented lenses, and the sixth and seventh lenses are cemented lenses.

[0318] It should be noted that in the radius of curvature Ri of each lens, i refers to the surface number of the lens.

[0319] Table 12 shows the basic structural parameters of the optical lens in Example Twelve, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0320] Surf Radius Thickness Nd Vd 1 21.2000 2.3000 1.80 46.57 2 91.0000 0.1000 3 37.0000 1.5000 1.85 23.78 4 44.0000 0.3000 STO Infinity 2.2000 6 -11.0000 3.3000 1.69 54.82 7 -7.2000 3.7000 1.91 35.25 8 -12.3720 0.3000 9 26.0000 3.5000 1.57 71.30 10 -33.0000 0.1000 11 23.0000 3.2000 1.70 55.53 12 -10.0000 5.0000 1.69 31.16 13 52.0000 1.0000 14 -13.6000 2.2000 1.49 70.44 15 31.4000 0.9000 16 Infinity 0.5000 1.52 64.20 17 Infinity 1.8426 18 Infinity 0.5000 1.52 64.20 19 Infinity 0.1250 IMA / /

[0321] Table 12

[0322] In summary, Examples 1 through 12 satisfy the relationships shown in Table 13.

[0323]

[0324]

[0325] Table 13

[0326] Table 14 provides the complete set of focal length values ​​F (in millimeters) for the optical lenses of Examples 1 to 12.

[0327]

[0328]

[0329] Table 14

[0330] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0331] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0332] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0333] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An optical lens, characterized in that, The optical lens has eight lenses with optical power, including: A first lens, the first lens having positive optical power, and the first side surface of the first lens being a convex surface; The second lens has optical power, and the surface shapes of the first side and the second side of the second lens are opposite. The third lens has positive optical power, the first side of the third lens is concave, and the second side of the third lens is convex; The fourth lens has negative optical power, the first side of the fourth lens is concave, and the second side 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. Wherein, the second lens has negative optical power, and the optical power of the sixth lens is opposite to that of the seventh lens; or the second lens has positive optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power. The sum of the center thicknesses of the sixth lens and the seventh lens, d67, and the total length TTL of the optical lens satisfy the following condition: d67 / TTL≤0.3; The total length TTL of the optical lens and the total focal length F of the optical lens satisfy the following condition: TTL / F≤3; The total focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.

05.

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

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

4. The optical lens according to claim 1, characterized in that, 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.

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

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

7. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is convex.

8. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is concave.

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

10. The optical lens according to claim 1, characterized in that, The sixth lens has positive optical power, and the second side surface of the sixth lens is convex.

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

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

13. The optical lens according to claim 1, characterized in that, The seventh lens has negative optical power, the first side of the seventh lens is concave, and the second side of the seventh lens is convex.

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

15. The optical lens according to claim 1, characterized in that, The seventh lens has negative optical power, the first side of the seventh lens is convex, and the second side of the seventh lens is concave.

16. The optical lens according to claim 1, characterized in that, The first side surface of the eighth lens is concave.

17. The optical lens according to claim 1, characterized in that, The first side surface of the eighth lens is convex.

18. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is located between the second lens and the third lens.

19. The optical lens according to claim 1, characterized in that, The third lens and the fourth lens are cemented lenses, and the sixth lens and the seventh lens are cemented lenses.

20. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R15 of the second side of the eighth lens satisfies the following relationship with the focal length F of the optical lens: 2.1395 ≥ R15 / F ≥ 0.

3.

21. The optical lens according to any one of claims 1 to 19, characterized in that, The total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens satisfy the following: 0.8387≥(F*θ) / D≥0.

3.

22. The optical lens according to any one of claims 1 to 19, characterized in that, The total 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 condition: 59.3031 ≥ (FOV × F) / H ≥ 45.

23. The optical lens according to any one of claims 1 to 19, characterized in that, The total length (TTL) 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 condition: TTL / H / FOV≤0.

5.

24. The optical lens according to any one of claims 1 to 19, characterized in that, The total 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 condition: 0.5≤F / H≤3.

25. The optical lens according to any one of claims 1 to 19, 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 aperture D of the first side surface of the first lens corresponding to the maximum field of view, and the maximum effective aperture D2 of the second side surface of the first lens corresponding to the maximum field of view satisfy the following: -1≤(R1 / D) / (R2 / D2)≤1.

26. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens satisfy the following condition: -6.5≤R9 / R10≤7.

27. The optical lens according to any one of claims 1 to 19, characterized in that, The total focal length F of the optical lens, the radian value θ of 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 the following relationship: |(HF*θ) / (F*θ)|≤0.

04.

28. The optical lens according to any one of claims 1 to 19, characterized in that, The total focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy the following condition: 1.6≤F / ENPD≤2.

29. The optical lens according to any one of claims 1 to 19, characterized in that, The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the total 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.

30. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view: R10 / D9≥-7.

31. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R10 of the second side of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: R10 / F≥-3.

5.

32. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R15 of the second side surface of the eighth lens and the total optical length TTL of the optical lens satisfy the following condition: 1.0148 ≥ R15 / TTL > 0.

001.

33. The optical lens according to any one of claims 1 to 19, characterized in that, The optical back focal length (BFL) of the optical lens and the total focal length (F) of the optical lens satisfy the following condition: BFL / F ≤ 0.

54.

34. The optical lens according to any one of claims 1 to 19, characterized in that, The radius of curvature R15 of the second side surface of the eighth lens satisfies the following condition with respect to the optical back focal length of the optical lens: R15 / BFL≥0.

5.

35. The optical lens according to any one of claims 1 to 19, characterized in that, The following conditions must be met: 2.1395≥R15 / F≥0.5, 0.1171≤d67 / TTL≤0.26, 0.8387≥(F*θ) / D≥0.5, 59.3031≥(FOV×F) / H≥50, 2.0531≤TTL / F≤2.5, 0.1008≤TTL / H / FOV≤0.3, 1≤F / H≤2.5, -0.5≤(R1 / D) / (R2 / D2)≤0.7 The parameters include: -4≤R9 / R10≤6.5, 1.6≤F / ENPD≤1.8, 0.0774≤D / H / F≤0.15, -0.8189≥R10 / D9≥-4, -0.4881≥R10 / F≥-2.5, 1.0148≥R15 / TTL≥0.2, 0.2330≤BFL / F≤0.41, R15 / BFL≥2, where the parameters include: the radius of curvature R15 of the second side surface of the eighth lens, the... The following parameters are considered: the total focal length F of the optical lens, the sum of the center thicknesses of the sixth lens and the seventh lens (d67), the total length TTL of the optical lens, the radian value θ of the maximum field of view of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, the radius of curvature R1 of the first side of the first lens, the radius of curvature R2 of the second side of the first lens, the maximum effective aperture D2 of the second side of the first lens corresponding to the maximum field of view, the radius of curvature R9 of the first side of the fifth lens, the radius of curvature R10 of the second side of the fifth lens, the entrance pupil diameter ENPD of the optical lens, and the optical back focal length BFL of the optical lens.

36. The optical lens according to any one of claims 1 to 19, characterized in that, The following conditions must be met: 2.1395≥R15 / F≥0.7599, 0.1171≤d67 / TTL≤0.2178, 0.8387≥(F*θ) / D≥0.7274, 59.3031≥(FOV×F) / H≥57.0779, 2.0531≤TTL / F≤2.1183, 0.1008≤TTL / H / FOV≤0.1042, 1.6599≤F / H≤1.706, -0.3361≤(R1 / D) / ( R2 / D2)≤0.4692, -1≤R9 / R10≤5.6250, 0.0008≤|(HF*θ) / (F*θ)|≤0.0339, 0.0774≤D / H / F≤0.0901, -0.8189≥R1 0 / D9≥-2.9026, -0.4881≥R10 / F≥-2.1409, 1.0148≥R15 / TTL≥0.3590, 0.2330≤BFL / F≤0.2654, 8.6439≥R15 / BF L≥3.0193, wherein the parameters include: the radius of curvature R15 of the second side of the eighth lens, the total focal length F of the optical lens, the sum of the center thicknesses of the sixth lens and the seventh lens d67, the total length TTL of the optical lens, the radian value θ of the maximum field of view of the optical lens, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view of the optical lens, the maximum field of view FOV of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, the radius of curvature R1 of the first side of the first lens, the radius of curvature R2 of the second side of the first lens, the maximum effective aperture D2 of the second side of the first lens corresponding to the maximum field of view, the radius of curvature R9 of the first side of the fifth lens, the radius of curvature R10 of the second side of the fifth lens, the entrance pupil diameter ENPD of the optical lens, and the optical back focal length BFL of the optical lens.

37. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 36 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images