Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens with negative optical power, the first side being a convex surface and the second side being a concave surface; a second lens with optical power, the first side being a concave surface; a third lens with optical power, the second side being a convex surface; a fourth lens with optical power, the first side being a convex surface and the second side being a concave surface; a fifth lens with positive optical power; a sixth lens with positive optical power, the first side being a convex surface and the second side being a convex surface; a seventh lens with negative optical power, the first side being a concave surface and the second side being a concave surface; an eighth lens with positive optical power, the first side being a convex surface and the second side being a convex surface; and a ninth lens with optical power, the first side being a convex surface and the second side being a concave surface. The application solves the problem that the optical lens in the prior art is difficult to simultaneously meet the requirements of small aperture, high resolution, low sensitivity, small distortion, high light throughput and good confocal performance.

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] Thanks to the rapid development of automotive driver assistance systems in recent years, optical lenses have been widely used in automobiles. These include applications such as in-vehicle reversing camera systems, dashcams, automatic parking and panoramic parking systems, and wayfinding systems.

[0003] Automotive lenses are key components for autonomous driving assistance systems to acquire external information. With the rapid development of autonomous driving assistance systems, the performance requirements for front-view optical lenses are also increasing, moving towards higher resolution, larger field of view, and lower distortion. At the same time, as autonomous driving places increasing demands on nighttime driving, the requirements for night vision capabilities of automotive lenses are also increasing. Therefore, the market currently needs an optical lens with a large aperture, high relative illumination, and low distortion to meet the needs of automotive front-view applications.

[0004] While existing technologies have proposed some optical lenses for automotive applications, they also suffer from inherent problems. For example, existing optical lenses cannot simultaneously meet the requirements of high resolution and miniaturization; although they can achieve megapixel resolution, aberrations such as chromatic aberration, astigmatism, and distortion are relatively severe; their light-gathering capabilities are weak, making them unsuitable for low-light environments such as nighttime or rainy days; they cannot simultaneously meet the requirements of small front-end aperture and miniaturization; and they cannot simultaneously meet the requirements of large aperture and high resolution.

[0005] In other words, existing optical lenses suffer from the problem of not being able to simultaneously achieve small aperture, high resolution, low sensitivity, low distortion, high light throughput, and good confocal performance. Summary of the Invention

[0006] The main objective of this invention is to provide an optical lens and an electronic device to solve the problem that existing optical lenses cannot simultaneously achieve small aperture, high resolution, low sensitivity, low distortion, high light transmission, and good confocal performance.

[0007] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following components in sequence: a first lens having negative optical power, wherein a first side surface of the first lens is convex and a second side surface is concave; a second lens having optical power, wherein a first side surface of the second lens is concave; a third lens having optical power, wherein a second side surface of the third lens is convex; a fourth lens having optical power, wherein a first side surface of the fourth lens is convex and a second side surface is concave; a fifth lens having positive optical power; a sixth lens having positive optical power, wherein a first side surface of the sixth lens is convex and a second side surface is convex; a seventh lens having negative optical power, wherein a first side surface of the seventh lens is concave and a second side surface is concave; an eighth lens having positive optical power, wherein a first side surface of the eighth lens is convex and a second side surface is convex; and a ninth lens having optical power, wherein a first side surface of the ninth lens is convex and a second side surface is concave.

[0008] Furthermore, the second lens has negative optical power, and the second side surface of the second lens is concave.

[0009] Furthermore, the second lens has negative optical power, and the second side surface of the second lens is convex.

[0010] Furthermore, the second lens has positive optical power, and the second side surface of the second lens is convex.

[0011] Furthermore, the third lens has negative optical power, and the first side surface of the third lens is concave.

[0012] Furthermore, the third lens has positive optical power, and the first side surface of the third lens is concave.

[0013] Furthermore, the third lens has positive optical power, and the first side surface of the third lens is convex.

[0014] Furthermore, the fourth lens has positive optical power.

[0015] Furthermore, the fourth lens has negative optical power.

[0016] Furthermore, the first side surface of the fifth lens is convex, and the second side surface is convex.

[0017] Furthermore, the first side of the fifth lens is concave, and the second side is convex.

[0018] Furthermore, the first side of the fifth lens is convex, and the second side is concave.

[0019] Furthermore, the ninth lens has positive optical power.

[0020] Furthermore, the ninth lens has negative optical power.

[0021] Furthermore, the second lens is cemented with the third lens to form a cemented doublet; and / or the sixth lens is cemented with the seventh lens to form a cemented doublet.

[0022] Furthermore, the optical lens also includes an aperture stop, which is positioned between the fourth lens and the fifth lens.

[0023] Furthermore, the first side surface of the ninth lens is provided with a recurve.

[0024] Furthermore, the eighth and ninth lenses are aspherical lenses.

[0025] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: BFL / TTL≥0.01.

[0026] Furthermore, the system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.01.

[0027] 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 radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤3.

[0028] 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 image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤2.5.

[0029] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5≤TTL / F≤30.

[0030] Furthermore, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -2≤R11 / R12≤-0.05.

[0031] Furthermore, the radius of curvature R14 of the first side surface of the eighth lens and the maximum effective aperture D14 of the first side surface of the eighth lens satisfy the following condition: 1≤R14 / D14≤4.

[0032] Furthermore, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.85.

[0033] Furthermore, the maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: D1 / TTL≤0.4.

[0034] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF×θ) / (F×θ)|≤0.3.

[0035] Furthermore, the entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: ENPD / H≥0.05.

[0036] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: F5 / F≥1.

[0037] 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: 0.1≤F / H≤1.

[0038] Furthermore, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: arctan(1 / K(S2))≥35°.

[0039] Furthermore, the center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3≤2.5.

[0040] Furthermore, the radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: R8 / F≥0.05.

[0041] Furthermore, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: F6 / F≥0.8.

[0042] Furthermore, the sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: |SAG2 / SAG1|≥1.5.

[0043] Furthermore, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: R15 / R17≥0.1.

[0044] According to another aspect of the present invention, an optical lens is provided, comprising, from a first side to a second side, the following in sequence: a first lens having negative optical power; a second lens having optical power; a third lens having optical power; a fourth lens having optical power; a fifth lens having positive optical power; a sixth lens having positive optical power; a seventh lens having negative optical power; an eighth lens having positive optical power; and a ninth lens having optical power; wherein the radius of curvature R8 of the second side surface of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: R8 / F ≥ 0.05.

[0045] Furthermore, the first side surface of the first lens is convex, and the second side surface is concave.

[0046] Furthermore, the second lens has negative optical power, and both its first and second sides are concave.

[0047] Furthermore, the second lens has negative optical power, and the first side of the second lens is concave and the second side is convex.

[0048] Furthermore, the second lens has positive optical power, and the first side of the second lens is concave and the second side is convex.

[0049] Furthermore, the third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

[0050] Furthermore, the third lens has positive optical power, and the first side of the third lens is concave and the second side is convex.

[0051] Furthermore, the third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

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

[0053] Furthermore, the fourth lens has negative optical power, and its first side surface is convex while its second side surface is concave.

[0054] Furthermore, the first side surface of the fifth lens is convex, and the second side surface is convex.

[0055] Furthermore, the first side of the fifth lens is concave, and the second side is convex.

[0056] Furthermore, the first side of the fifth lens is convex, and the second side is concave.

[0057] Furthermore, the first side surface of the sixth lens is convex, and the second side surface is convex.

[0058] Furthermore, the first side surface of the seventh lens is concave, and the second side surface is concave.

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

[0060] Furthermore, the ninth lens has positive optical power, and the first side of the ninth lens is convex and the second side is concave.

[0061] Furthermore, the ninth lens has negative optical power, and its first side surface is convex while its second side surface is concave.

[0062] Furthermore, the second lens is cemented with the third lens to form a cemented doublet; and / or the sixth lens is cemented with the seventh lens to form a cemented doublet.

[0063] Furthermore, the optical lens also includes an aperture stop, which is positioned between the fourth lens and the fifth lens.

[0064] Furthermore, the first side surface of the ninth lens is provided with a recurve.

[0065] Furthermore, the eighth and ninth lenses are aspherical lenses.

[0066] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: BFL / TTL≥0.01.

[0067] Furthermore, the system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.01.

[0068] 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 radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: D / H / θ≤3.

[0069] 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 image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤2.5.

[0070] Furthermore, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5≤TTL / F≤30.

[0071] Furthermore, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -2≤R11 / R12≤-0.05.

[0072] Furthermore, the radius of curvature R14 of the first side surface of the eighth lens and the maximum effective aperture D14 of the first side surface of the eighth lens satisfy the following condition: 1≤R14 / D14≤4.

[0073] Furthermore, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.85.

[0074] Furthermore, the maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: D1 / TTL≤0.4.

[0075] Furthermore, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF×θ) / (F×θ)|≤0.3.

[0076] Furthermore, the entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: ENPD / H≥0.05.

[0077] Furthermore, the focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: F5 / F≥1.

[0078] 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: 0.1≤F / H≤1.

[0079] Furthermore, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: arctan(1 / K(S2))≥35°.

[0080] Furthermore, the center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3≤2.5.

[0081] Furthermore, the focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: F6 / F≥0.8.

[0082] Furthermore, the sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: |SAG2 / SAG1|≥1.5.

[0083] Furthermore, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: R15 / R17≥0.1.

[0084] 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.

[0085] Applying the technical solution of this invention, the optical lens sequentially includes, from the first side to the second side, a first lens with negative optical power, a second lens with optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with positive optical power, and a ninth lens with optical power; the first side of the first lens is convex and the second side is concave; the first side of the second lens is concave; the second side of the third lens is convex; the first side of the fourth lens is convex and the second side is concave; the first side of the sixth lens is convex and the second side is convex; the first side of the seventh lens is concave and the second side is concave; the first side of the eighth lens is convex and the second side is convex; and the first side of the ninth lens is convex and the second side is concave.

[0086] The first lens has negative optical power, and its first side is convex, which converges light and prevents excessive light divergence. Combined with a concave second side, this ensures a smooth transition of light path, facilitating control over the aperture of the rear lens and enabling miniaturization. Furthermore, designing the first lens in a meniscus shape maximizes the collection of light from a wide field of view into the rear optical system, increasing light transmission. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture, and the convex first side reduces the interference of water droplets on image quality, ensuring superior image quality.

[0087] The optical power of the second lens can be positive or negative, and its first side surface is concave. When the second lens has a negative optical power, it has a diverging effect on light, which can disperse the central and peripheral rays of each field of view, enlarge the aperture, increase the system illumination, and facilitate the correction of aberrations between the peripheral and central rays, achieving high resolution. Under the same field of view, the light emitted from the second side surface of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the imaging surface. At the same time, the concave first side surface of the second lens allows the light emitted from the second lens to smoothly enter the first side surface of the third lens, which facilitates a smooth light transition, reduces light energy loss, improves the illumination of the peripheral field of view, and changes the trend of peripheral rays, thereby reducing the front aperture, reducing the volume, and contributing to miniaturization and cost reduction. When the second lens has positive optical power, it converges light rays. Under the same field of view, the light rays exiting from the second side of the second lens allow the subsequent optical system to have a larger light-receiving surface. Simultaneously, the concave shape of the first side of the second lens causes a significant light reversal upon entering the lens, altering the trend of large-angle light. Furthermore, the combination of the shapes of the two sides allows for a smooth transition of light rays exiting from the second lens to the first side of the third lens, reducing light loss and improving illumination in the peripheral field of view. It also alters the trajectory of edge light rays, enabling a reduction in the lens's front aperture, thus reducing size and facilitating miniaturization and cost reduction.

[0088] The optical power of the third lens can be either positive or negative, and its second side surface is convex. When the third lens has a negative optical power, it diverges light rays. When paired with a second lens of positive optical power, this helps light enter the rear lens more smoothly, improving resolution. The convex nature of the second side surface of the third lens helps to change the trajectory of peripheral light rays, allowing for a reduction in the front aperture of the optical lens, thus reducing its size and contributing to miniaturization and cost reduction. Conversely, when the third lens has a positive optical power, it converges light rays. When paired with a second lens of negative optical power, this helps light enter the rear lens more smoothly, improving resolution. The convex nature of the second side surface of the third lens helps to change the trajectory of peripheral light rays, allowing for a reduction in the front aperture of the optical lens, thus reducing its size and contributing to miniaturization and cost reduction.

[0089] The optical power of the fourth lens can be positive or negative. The first side of the fourth lens is convex, and the second side is concave. The fourth lens is a glass spherical surface convex towards the first side, collecting light rays entering through the third lens. When the optical power of the fourth lens is positive, positive power helps to properly converge the light rays, resulting in a smooth transition in the light path. Furthermore, the significant difference in shape between the second side of the third lens and the first side of the fourth lens leads to a noticeable change in the light path. With the same aperture of the fourth lens, this allows for a reduction in the front aperture and miniaturization. When the fourth lens has a negative optical power, its shape is flat, and the first side is convex. This compresses the angle of the incident light rays, achieving a smooth transition and allowing diverging light rays to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the rear lens aperture. The first side of the fourth lens is convex, and the second side is concave, ensuring that light rays are almost perpendicularly incident upon reaching the second side, resulting in minimal light deflection and energy loss, while also reducing the lens's sensitivity.

[0090] The fifth lens has positive optical power, which helps to converge light appropriately and make the light path transition smoothly. At the same time, it can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to enter smoothly into the rear, further making the light path transition smoothly, which is conducive to reducing the aperture of the rear lens.

[0091] The sixth lens has positive optical power, and both its first and second sides are convex. The positive optical power and gentle shape of the sixth lens compress the angle of the incident light, allowing for a smooth transition of light rays. This enables diverging light rays to smoothly enter the rear, further stabilizing the light path and facilitating a reduction in the aperture of the rear lens.

[0092] The seventh lens has negative optical power, and both its first and second sides are concave. This negative optical power diverges light rays, dispersing them across the field of view, increasing system illumination, which is beneficial for correcting aberrations and achieving high resolution. The concave first and second sides of the seventh lens facilitate a smoother transition of light from the sixth lens, reducing light loss and increasing illumination in the peripheral field of view. Simultaneously, it alters the trajectory of edge rays, allowing for a smaller front aperture and reduced overall size.

[0093] The eighth lens has positive optical power, and both its first and second sides are convex. The eighth lens is preferably a glass aspherical lens, possessing positive optical power, a biconvex shape, and a gently sloping shape. This allows diverging light rays to smoothly enter the rear, further smoothing the light path and improving astigmatism and field curvature, thereby enhancing the resolving power of the optical system.

[0094] The ninth lens has a positive or negative optical power, and its first side surface is convex while its second side surface is concave. An aspherical lens is preferred for the ninth lens. When the ninth lens has a negative optical power and a convex-concave shape, it allows as many peripheral large-angle rays to smoothly transition to the imaging plane as possible, correcting astigmatism and field curvature, and improving the resolving power of the optical lens. When the ninth lens has a positive optical power and a convex-concave shape, it facilitates a smooth transition of light to the rear optical system, resulting in smaller aberrations and improving the resolving power of the optical system.

[0095] The optical lens of the present invention employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect, such as small aperture, high resolution, low sensitivity, low distortion, high light transmission, good confocal performance, and miniaturization. Attached Figure Description

[0096] 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:

[0097] Figure 1 A schematic diagram of the structure of an optical lens of Example 1 of the present invention is shown;

[0098] Figure 2 A schematic diagram of the structure of the optical lens of Example 2 of the present invention is shown;

[0099] Figure 3 A schematic diagram of the structure of the optical lens of Example 3 of the present invention is shown;

[0100] Figure 4 A schematic diagram of the structure of the optical lens of Example 4 of the present invention is shown;

[0101] Figure 5 A schematic diagram of the structure of the optical lens of Example 5 of the present invention is shown;

[0102] Figure 6 A schematic diagram of the structure of the optical lens of Example Six of the present invention is shown;

[0103] Figure 7 A schematic diagram of the structure of the optical lens of Example Seven of the present invention is shown;

[0104] Figure 8 A schematic diagram of the structure of the optical lens of Example 8 of the present invention is shown;

[0105] Figure 9 A schematic diagram of the structure of the optical lens of Example 9 of the present invention is shown;

[0106] Figure 10 A schematic diagram of the structure of the optical lens of Example 10 of the present invention is shown.

[0107] The above figures include the following reference numerals:

[0108] L1, First lens; S1, First side surface of the first lens; S2, Second side surface of the first lens; L2, Second lens; S3, First side surface of the second lens; S4, Second side surface of the second lens; L3, Third lens; S4, First side surface of the third lens; S5, Second side surface of the third lens; L4, Fourth lens; S6, First side surface of the fourth lens; S7, Second side surface of the fourth lens; STO, Aperture stop; L5, Fifth lens; S9, First side surface of the fifth lens; S10, Second side surface of the fifth lens; L6, Sixth lens; S11, First side surface of the sixth lens; S12, Second side surface of the sixth lens; L7, Seventh lens; S12, First side surface of the seventh lens; S13, Second side surface of the seventh lens; L8, Eighth lens; S14, First side surface of the eighth lens; S15, Second side surface of the eighth lens; L9, Ninth lens; S16, First side surface of the ninth lens; S17, Second side surface of the ninth lens; S18, First side surface of the protective glass; S19, Second side surface of the protective glass; IMA, Imaging plane. Detailed Implementation

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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 first side is called the first side surface of the lens, and the surface of each lens closest to the second 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 known 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.

[0115] It should be noted that the left side of the optical lens is the first side, and the right side of the optical lens is the second side.

[0116] In an exemplary embodiment, the optical lens provided in this application can be used as a regular lens or a vehicle-mounted lens. For a vehicle-mounted lens, the left side is the object side and the right side is the image side; the first side is also the object side, and the second side is also the image side.

[0117] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitter lens, with the first side being the imaging side and the second side being the image source side.

[0118] To address the problem that existing optical lenses often struggle to simultaneously achieve small aperture, high resolution, low sensitivity, low distortion, high light throughput, and good confocal performance, this invention provides an optical lens and an electronic device.

[0119] Example 1

[0120] like Figures 1 to 10As shown, the optical lens, from the first side to the second side, includes a first lens with negative optical power, a second lens with optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power, a sixth lens with positive optical power, a seventh lens with negative optical power, an eighth lens with positive optical power, and a ninth lens with optical power. The first side of the first lens is convex and the second side is concave; the first side of the second lens is concave; the second side of the third lens is convex; the first side of the fourth lens is convex and the second side is concave; the first side of the sixth lens is convex and the second side is convex; the first side of the seventh lens is concave and the second side is concave; the first side of the eighth lens is convex and the second side is convex; and the first side of the ninth lens is convex and the second side is concave.

[0121] The first lens has negative optical power, and its first side is convex, which converges light and prevents excessive light divergence. Combined with a concave second side, this ensures a smooth transition of light path, facilitating control over the aperture of the rear lens and enabling miniaturization. Furthermore, designing the first lens in a meniscus shape maximizes the collection of light from a wide field of view into the rear optical system, increasing light transmission. The first lens is preferably made of a high-refractive-index material, which helps reduce the front aperture, and the convex first side reduces the interference of water droplets on image quality, ensuring superior image quality.

[0122] The optical power of the second lens can be positive or negative, and its first side surface is concave. When the second lens has a negative optical power, it has a diverging effect on light, which can disperse the central and peripheral rays of each field of view, enlarge the aperture, increase the system illumination, and facilitate the correction of aberrations between the peripheral and central rays, achieving high resolution. Under the same field of view, the light emitted from the second side surface of the first lens can provide a larger light receiving surface for the subsequent optical system, enabling a larger physical aperture of the aperture, a larger aperture ring, and a greater amount of light intake, thus increasing the brightness of the imaging surface. At the same time, the concave first side surface of the second lens allows the light emitted from the second lens to smoothly enter the first side surface of the third lens, which facilitates a smooth light transition, reduces light energy loss, improves the illumination of the peripheral field of view, and changes the trend of peripheral rays, thereby reducing the front aperture, reducing the volume, and contributing to miniaturization and cost reduction. When the second lens has positive optical power, it converges light rays. Under the same field of view, the light rays exiting from the second side of the second lens allow the subsequent optical system to have a larger light-receiving surface. Simultaneously, the concave shape of the first side of the second lens causes a significant light reversal upon entering the lens, altering the trend of large-angle light rays. Furthermore, the combination of the shapes of the two sides allows for a smooth transition of light rays from the second lens to the first side of the third lens, reducing light loss, improving illumination in the peripheral field of view, and changing the trajectory of edge light rays. This enables a reduction in the lens's front aperture, decreasing its size and facilitating miniaturization and cost reduction.

[0123] The optical power of the third lens can be either positive or negative, and its second side surface is convex. When the third lens has a negative optical power, it diverges light rays. When paired with a second lens of positive optical power, this helps light enter the rear lens more smoothly, improving resolution. The convex nature of the second side surface of the third lens helps to change the trajectory of peripheral light rays, allowing for a reduction in the front aperture of the optical lens, thus reducing its size and contributing to miniaturization and cost reduction. Conversely, when the third lens has a positive optical power, it converges light rays. When paired with a second lens of negative optical power, this helps light enter the rear lens more smoothly, improving resolution. The convex nature of the second side surface of the third lens helps to change the trajectory of peripheral light rays, allowing for a reduction in the front aperture of the optical lens, thus reducing its size and contributing to miniaturization and cost reduction.

[0124] The optical power of the fourth lens can be positive or negative. The first side of the fourth lens is convex, and the second side is concave. The fourth lens is a glass spherical surface convex towards the first side, collecting light rays entering through the third lens. When the optical power of the fourth lens is positive, positive power helps to properly converge the light rays, resulting in a smooth transition in the light path. Furthermore, the significant difference in shape between the second side of the third lens and the first side of the fourth lens leads to a noticeable change in the light path. With the same aperture of the fourth lens, this allows for a reduction in the front aperture and miniaturization. When the fourth lens has a negative optical power, its shape is flat, and the first side is convex. This compresses the angle of the incident light rays, achieving a smooth transition and allowing diverging light rays to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the rear lens aperture. The first side of the fourth lens is convex, and the second side is concave, ensuring that light rays are almost perpendicularly incident upon reaching the second side, resulting in minimal light deflection and energy loss, while also reducing the lens's sensitivity.

[0125] The fifth lens has positive optical power, which helps to converge light appropriately and make the light path transition smoothly. At the same time, it can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to enter smoothly into the rear, further making the light path transition smoothly, which is conducive to reducing the aperture of the rear lens.

[0126] The sixth lens has positive optical power, and both its first and second sides are convex. The positive optical power and gentle shape of the sixth lens compress the angle of the incident light, allowing for a smooth transition of light rays. This enables diverging light rays to smoothly enter the rear, further stabilizing the light path and facilitating a reduction in the aperture of the rear lens.

[0127] The seventh lens has negative optical power, and both its first and second sides are concave. This negative optical power diverges light rays, dispersing them across the field of view, increasing system illumination, which is beneficial for correcting aberrations and achieving high resolution. The concave first and second sides of the seventh lens facilitate a smoother transition of light from the sixth lens, reducing light loss and increasing illumination in the peripheral field of view. Simultaneously, it alters the trajectory of edge rays, allowing for a smaller front aperture and reduced overall size.

[0128] The eighth lens has positive optical power, and both its first and second sides are convex. The eighth lens is preferably a glass aspherical lens, possessing positive optical power, a biconvex shape, and a gently sloping shape. This allows diverging light rays to smoothly enter the rear, further smoothing the light path and improving astigmatism and field curvature, thereby enhancing the resolving power of the optical system.

[0129] The ninth lens has a positive or negative optical power, and its first side surface is convex while its second side surface is concave. An aspherical lens is preferred for the ninth lens. When the ninth lens has a negative optical power and a convex-concave shape, it allows as many peripheral large-angle rays to smoothly transition to the imaging plane as possible, correcting astigmatism and field curvature, and improving the resolving power of the optical lens. When the ninth lens has a positive optical power and a convex-concave shape, it facilitates a smooth transition of light to the rear optical system, resulting in smaller aberrations and improving the resolving power of the optical system.

[0130] The optical lens of the present invention employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect, such as small aperture, high resolution, low sensitivity, low distortion, high light transmission, good confocal performance, and miniaturization.

[0131] In this embodiment, the second lens has negative optical power, and its second side surface is concave. The negative optical power of the second lens diverges light rays, separating the central and peripheral rays from each field of view, thus enlarging the aperture and increasing system illumination. It also facilitates the correction of aberrations between the central and peripheral rays, achieving high resolution. Under the same field of view, the light emitted from the second side surface of the first lens provides a larger light-receiving surface for the subsequent optical system, enabling a larger aperture and greater light intake, thus increasing image brightness. Simultaneously, the concave surfaces of the first and second sides of the second lens work together to ensure a smooth transition of light rays to the first side surface of the third lens, reducing light loss and improving illumination in the peripheral field of view. Furthermore, it alters the trajectory of peripheral rays, allowing for a smaller front aperture, reducing size, and promoting miniaturization and cost reduction.

[0132] In this embodiment, the second lens has negative optical power, and its second side surface is convex. The negative optical power of the second lens diverges light, which helps to disperse light from different fields of view, enlarge the aperture, increase system illumination, and facilitate aberration correction, achieving high resolution. Simultaneously, the concave shape of the first side causes a significant light reversal when light enters the second lens, altering the trend of large-angle light. Furthermore, the concave first side and convex second side of the second lens allow light emitted from the second lens to smoothly enter the first side surface of the third lens, facilitating a smooth transition, reducing light energy loss, improving illumination in the peripheral fields of view, changing the trend of edge light, reducing the front aperture, and decreasing the overall size, thus contributing to miniaturization.

[0133] In this embodiment, the second lens has positive optical power, and its second side surface is convex. The positive optical power of the second lens converges light rays. Under the same field of view, the light rays exiting through the second side surface of the second lens provide a larger light-receiving surface for subsequent optical systems. Simultaneously, the convex shape of the second side causes a significant light reversal as the light enters the second lens, altering the trend of large-angle light. Furthermore, the combination of the shapes of the two side surfaces allows for a smooth transition of light rays exiting the second lens onto the first side surface of the third lens, reducing light loss, improving illumination in the peripheral field of view, and altering the trajectory of edge light rays. This maintains the advantage of a small front-end aperture, while also contributing to miniaturization and cost reduction.

[0134] In this embodiment, the third lens has negative optical power, and its first side surface is concave. The negative optical power of the third lens diverges light rays, which, when combined with the positive optical power of the second lens, facilitates the smooth entry of light into the rear lens, improving resolution. Simultaneously, the concave first side surface of the third lens, in conjunction with the convex second side surface, alters the trajectory of edge light rays, facilitating a reduction in the front aperture and achieving miniaturization, thus helping to maintain low cost.

[0135] In this embodiment, the third lens has positive optical power, and its first side surface is concave. The positive optical power of the third lens converges light rays, and when paired with the negative optical power of the second lens, it facilitates the smooth entry of light into the rear lens, improving resolution. Simultaneously, the concave first side surface of the third lens, combined with the convex second side surface, alters the trajectory of edge light rays, which helps reduce the front aperture, achieving miniaturization and ensuring low cost.

[0136] In this embodiment, the third lens has positive optical power, and its first side surface is convex. The positive optical power of the third lens converges light rays, and when combined with the negative optical power of the second lens, it facilitates a smoother entry of light into the rear lens, improving resolution. The convexity of the first side surface of the third lens, combined with the convexity of the second side surface, compresses the angle of the incident light rays, achieving a smooth transition and allowing diverging light rays to smoothly enter the rear, further smoothing the light path and helping to reduce the aperture of the rear lens.

[0137] In this embodiment, the fourth lens has positive optical power. The fourth lens is a spherical glass lens with a convex shape towards the first side, which collects the light entering through the third lens. Positive optical power helps to properly converge the light and make the light path transition smoothly. In addition, the second side of the third lens and the first side of the fourth lens have significantly different shapes, and the fourth lens significantly changes the light path. With the same aperture of the fourth lens, the purpose of reducing the front aperture and miniaturizing the optical lens can be achieved.

[0138] In this embodiment, the fourth lens has negative optical power. The fourth lens has negative optical power and a gently sloping shape. Its first side is convex, which compresses the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. The first side of the fourth lens is convex, and the second side is concave, ensuring that light reaches the second side almost perpendicularly, resulting in minimal light deflection and energy loss, while also reducing lens sensitivity.

[0139] In this embodiment, both the first and second sides of the fifth lens are convex. The fifth lens has positive optical power and a gently sloping shape. The convex first side of the fifth lens compresses the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. Furthermore, the significant difference in shape between the second side of the fourth lens and the first side of the fifth lens results in a noticeable change in the light path; with the same aperture of the fifth lens, a reduction in the front aperture and miniaturization can be achieved.

[0140] In this embodiment, the first side of the fifth lens is concave, and the second side is convex. The fifth lens is a meniscus-shaped spherical lens with a concave first side, collecting the light rays entering through the fourth lens and ensuring a smooth transition in the light path. The concave first side and convex second side of the fifth lens ensure that the light rays are almost perpendicularly incident when they reach the second side, resulting in minimal light deflection and greater concentration upon reaching the imaging plane. This defocusing corrects edge field aberrations, achieving high resolution while minimizing light energy loss and reducing lens sensitivity.

[0141] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is concave. The fifth lens has positive optical power; light rays are incident almost perpendicularly onto the second side surface of the fifth lens, resulting in a smooth light transition and minimal aberrations, which is beneficial for achieving high resolution and improving the resolving power of the optical system. The convex shape of the first side surface of the fifth lens collects light rays entering through the fourth lens, facilitating light convergence. Furthermore, the significant shape difference between the second side surface of the fourth lens and the first side surface of the fifth lens means that the fifth lens significantly alters the light trajectory, which helps to reduce the front aperture of the optical lens and achieve lens miniaturization.

[0142] In this embodiment, the ninth lens has positive optical power. When the optical power of the ninth lens is positive and its shape is convex and concave, it facilitates a smooth transition of light to the rear optical system, resulting in smaller aberrations and improved resolving power of the optical system.

[0143] In this embodiment, the ninth lens has a negative optical power. When the optical power of the ninth lens is negative and its shape is convex and concave, it allows as many peripheral large-angle rays to smoothly transition to the imaging surface as possible, correcting astigmatism and field curvature, and improving the resolving power of the optical lens.

[0144] In this embodiment, the second and third lenses are cemented together to form a cemented doublet; the sixth and seventh lenses are also cemented together to form a cemented doublet. By rationally configuring the cemented doublet, the light rays from the front lens can be smoothly transitioned to the rear optical system, reducing the overall system length. This allows for sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Simultaneously, the cemented doublet reduces the air gap between the two cemented lenses, further reducing the overall system length; the complementary dispersion of the two lenses helps reduce chromatic aberration and improve image quality; it also reduces the number of assembly components between the two lenses, simplifying processes and lowering costs; furthermore, it reduces field curvature, correcting off-axis point aberrations. Rational allocation of the focal lengths of the two cemented lenses facilitates thermal compensation, resulting in good temperature performance.

[0145] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the fourth lens and the fifth lens. By placing the aperture stop between the fourth lens and the fifth lens, it is beneficial to effectively converge the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0146] In this embodiment, the first side surface of the ninth lens is inverted. By properly setting the inversion, it is beneficial to balance aberrations and improve the resolving power of the optical lens.

[0147] In this embodiment, the eighth and ninth lenses are aspherical lenses. Using two aspherical lenses, preferably the eighth and ninth lenses, is beneficial for correcting system aberrations and improving resolving power.

[0148] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the condition: BFL / TTL ≥ 0.01. Satisfying this condition not only meets the specific requirements for the back focal length of the optical lens but also reserves space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, BFL / TTL ≥ 0.05.

[0149] In this embodiment, the system focal lengths FR, FG, and FB of the optical lens at 650nm wavelength and 555nm wavelength respectively satisfy the condition (FR-FB) / FG ≤ 0.01. Meeting this condition ensures that the optical lens has similar focal lengths in both visible light and single-wavelength (R, G, B) applications, achieving cofocal focusing across a wide visible light band and single-wavelength (R, G, B) applications. Preferably, (FR-FB) / FG ≤ 0.005.

[0150] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D / H / θ≤3. Satisfying this condition allows the optical lens to have a large target surface and small aperture characteristics under a fixed focal length. Preferably, D / H / θ≤1.5.

[0151] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F ≤ 2.5. Satisfying this condition, under a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. D / H / F ≤ 1.8.

[0152] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5 ≤ TTL / F ≤ 30. If TTL / F is too small, the system sensitivity will be high; a larger TTL / F is beneficial for resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity protection, a range is considered. Preferably, 8.5 ≤ TTL / F ≤ 15.

[0153] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the condition: -2 ≤ R11 / R12 ≤ -0.05. By rationally configuring the radius of curvature of the sixth lens, the light collected by the fifth lens is compressed, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves system imaging quality. If the value is below the lower limit of the condition, the incident angle of the light rays incident on the first side surface of the sixth lens increases, leading to a decrease in relative illumination. Therefore, satisfying this condition allows for the acquisition of a high-quality, bright image. Preferably, -1.5 ≤ R11 / R12 ≤ -0.3.

[0154] In this embodiment, the radius of curvature R14 of the first side surface of the eighth lens and the maximum effective aperture D14 of the first side surface of the eighth lens satisfy the following relationship: 1 ≤ R14 / D14 ≤ 4. By reasonably setting the ratio of the lens's radius of curvature to its aperture, it is beneficial to reduce the height of the light entering the eighth lens (small R value), achieving a small aperture, while also considering the lens's manufacturability (the R value cannot be too small). Preferably, 1.2 ≤ R14 / D14 ≤ 3.

[0155] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the condition: (R1-R2) / (R1+R2)≤0.85. Satisfying this condition corrects aberrations in the optical system and ensures that the incident light rays from the first lens are relatively smooth when incident on the first side surface of the second lens, thereby reducing the tolerance sensitivity of the optical system. Preferably, (R1-R2) / (R1+R2)≤0.7.

[0156] In this embodiment, the maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: D1 / TTL≤0.4. Satisfying this condition ensures a small front aperture, enabling miniaturization. Preferably, D1 / TTL≤0.39.

[0157] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: |(HF×θ) / (F×θ)|≤0.3. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF×θ) / (F×θ)|≤0.25.

[0158] In this embodiment, the entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: ENPD / H ≥ 0.05. Satisfying this condition ensures that, with the field of view and image plane size of the optical lens remaining constant, a larger entrance pupil diameter is beneficial for increasing light transmission and improving relative illumination. Preferably, ENPD / H ≥ 0.15.

[0159] In this embodiment, the focal length F5 of the fifth lens satisfies the condition F5 / F≥1 with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the fifth lens's focal length, allowing light to enter the optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, F5 / F≥2.

[0160] In this embodiment, 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: 0.1 ≤ F / H ≤ 1. Controlling the focal length and image height of the optical lens within a certain range is beneficial to improving resolving power. Preferably, 0.3 ≤ F / H ≤ 0.7.

[0161] In this embodiment, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: arctan(1 / K(S2))≥35°. Satisfying this condition ensures a large angle subtended by the second side of the first lens, which is beneficial for the rapid focusing of large-angle peripheral light rays entering through the first lens, thus improving image quality. Preferably, arctan(1 / K(S2))≥45°.

[0162] In this embodiment, the center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3 ≤ 2.5. Satisfying this condition ensures that the center thicknesses of the two lenses are similar, which helps to minimize the light refraction variation of the overall optical lens under high and low temperatures, resulting in excellent temperature performance. Preferably, d4 / d3 ≤ 2.2.

[0163] In this embodiment, the radius of curvature R8 of the second side surface of the fourth lens and the focal length F of the entire optical lens satisfy the condition: R8 / F ≥ 0.05. When the ratio of the radius of curvature of the second side surface of the fourth lens to the focal length is within a controlled range, it can help smooth the light path, especially the light at the edge of the field of view, which can better correct aberrations, improve image quality, and thus achieve high resolution. Preferably, R8 / F ≥ 0.2.

[0164] In this embodiment, the focal length F6 of the sixth lens satisfies the condition F6 / F≥0.8 with the overall focal length F of the optical lens. By rationally allocating the focal length of the sixth lens, light can enter the rear optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, F6 / F≥1.

[0165] In this embodiment, the sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the condition: |SAG2 / SAG1|≥1.5. Satisfying this condition means that the sagitta of the two sides of the first lens differs significantly, which is beneficial for the first lens to collect light, allowing the light to smoothly transition to the rear, and effectively reducing system aberrations and improving the system's imaging quality.

[0166] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the condition: R15 / R17≥0.1. By rationally configuring the radius of curvature of the ninth lens, the light collected by the eighth lens is prevented from diverging excessively, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves the system's imaging quality. Preferably, R15 / R17≥0.4.

[0167] Example 2

[0168] like Figures 1 to 10 As shown, the optical lens, from the first side to the second side, sequentially includes: a first lens with negative optical power; a second lens with optical power; a third lens with optical power; a fourth lens with optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with negative optical power; an eighth lens with positive optical power; and a ninth lens with optical power. The radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the focal length F of the entire optical lens: R8 / F ≥ 0.05. When the ratio of the radius of curvature of the second side of the fourth lens to the focal length is within a controlled range, it can help smooth the light path, especially the light at the edge of the field of view, better correct aberrations, improve image quality, and thus achieve high resolution. Preferably, R8 / F ≥ 0.2.

[0169] In this embodiment, the first side of the first lens is convex, and the second side is concave. The first lens has negative optical power, and the convex shape of its first side helps to converge light, preventing excessive divergence of light from the first side. Combined with the concave design of the second side, this ensures a smooth transition of light path, which is beneficial for controlling the aperture of the rear lens and achieving a miniaturized design. Simultaneously, designing the first lens in a meniscus shape allows for the collection of light from a large field of view into the rear optical system, increasing light transmission. The first lens is preferably made of a high-refractive-index material, which facilitates a reduction in the front aperture. Furthermore, the convex design of the first side reduces the interference of water droplets on image quality, ensuring better image quality.

[0170] In this embodiment, the second lens has negative optical power, and both its first and second sides are concave. The negative optical power of the second lens diverges light rays, separating the central and peripheral rays from each field of view, thus enlarging the aperture and increasing system illumination. It also facilitates the correction of aberrations between the central and peripheral rays, achieving high resolution. Under the same field of view, the light emitted from the second side of the first lens provides a larger light-receiving surface for the subsequent optical system, allowing for a larger aperture and greater light intake, thus increasing image brightness. Furthermore, the concave surfaces of the first and second sides of the second lens work together to ensure a smooth transition of light rays to the first side of the third lens, reducing light loss and improving illumination in the peripheral field of view. This also alters the trajectory of peripheral rays, facilitating a smaller front aperture, reducing size, and promoting miniaturization and cost reduction.

[0171] In this embodiment, the second lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the second lens diverges light, effectively dispersing light from different fields of view, increasing the aperture, enhancing system illumination, and facilitating aberration correction for high resolution. Simultaneously, the concave shape of the first side causes a significant light deflection as light enters the second lens, altering the trend of large-angle light. Furthermore, the concave first side and convex second side of the second lens allow light exiting the second lens to smoothly transition to the first side of the third lens, reducing light loss, improving illumination in the peripheral fields of view, and altering the trajectory of edge light. This also reduces the front aperture and overall size, contributing to miniaturization.

[0172] In this embodiment, the second lens has positive optical power, with a concave first side and a convex second side. The positive optical power of the second lens converges light rays. Under the same field of view, light rays exiting from the second side of the second lens provide a larger light-receiving surface for subsequent optical systems. The convex shape of the second side also causes a significant light deflection as light enters the second lens, altering the trend of large-angle light. Furthermore, the combination of the two side shapes allows for a smooth transition of light rays from the second lens to the first side of the third lens, reducing light loss, improving illumination in the peripheral field of view, and altering the trajectory of edge light rays. This maintains the advantage of a small front-end aperture while also contributing to miniaturization and cost reduction.

[0173] In this embodiment, the third lens has negative optical power, with a concave first side and a convex second side. The negative optical power of the third lens diverges light rays, which, when combined with the positive optical power of the second lens, facilitates smoother light entry into the rear lens, improving resolution. Simultaneously, the concave first side of the third lens, in conjunction with the convex second side, alters the trajectory of edge light rays, enabling a reduction in the front aperture and achieving miniaturization, thus contributing to lower costs.

[0174] In this embodiment, the third lens has positive optical power, with a concave first side and a convex second side. The positive optical power of the third lens converges light rays, and when combined with the negative optical power of the second lens, it facilitates smoother light entry into the rear lens, improving resolution. Simultaneously, the concave first side of the third lens, in conjunction with the convex second side, alters the trajectory of edge light rays, enabling a reduction in the front aperture and achieving miniaturization, thus helping to maintain low cost.

[0175] In this embodiment, the third lens has positive optical power, and both its first and second sides are convex. The positive optical power of the third lens converges light rays, and when combined with the negative optical power of the second lens, it facilitates a smoother entry of light into the rear lens, improving resolution. The convexity of the first side of the third lens, combined with the convexity of the second side, compresses the angle of the incident light rays, achieving a smooth transition and allowing diverging light rays to smoothly enter the rear, further smoothing the light path and helping to reduce the aperture of the rear lens.

[0176] In this embodiment, the fourth lens has positive optical power, with a convex first side and a concave second side. The fourth lens is a spherical glass lens convex towards the first side, collecting light rays entering through the third lens. Positive optical power facilitates proper light convergence and a smooth transition in light path. Furthermore, the significant shape difference between the second side of the third lens and the first side of the fourth lens results in a noticeable alteration of the light path by the fourth lens. With the same aperture of the fourth lens, the front aperture of the optical lens can be reduced and miniaturized.

[0177] In this embodiment, the fourth lens has negative optical power, with a convex first side and a concave second side. The negative optical power and gently sloping shape of the fourth lens, along with its convex first side, compress the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. The convex first side and concave second side ensure that light reaches the second side almost perpendicularly, resulting in minimal light deflection and energy loss, while also reducing lens sensitivity.

[0178] In this embodiment, both the first and second sides of the fifth lens are convex. The fifth lens has positive optical power and a gently sloping shape. The convex first side of the fifth lens compresses the angle of the incident light, achieving a smooth transition and allowing diverging light to smoothly enter the rear, further smoothing the light path and facilitating a reduction in the aperture of the rear lens. Furthermore, the significant difference in shape between the second side of the fourth lens and the first side of the fifth lens results in a noticeable change in the light path; with the same aperture of the fifth lens, a reduction in the front aperture and miniaturization can be achieved.

[0179] In this embodiment, the first side of the fifth lens is concave, and the second side is convex. The fifth lens is a meniscus-shaped spherical lens with a concave first side, collecting the light rays entering through the fourth lens and ensuring a smooth transition in the light path. The concave first side and convex second side of the fifth lens ensure that the light rays are almost perpendicularly incident when they reach the second side, resulting in minimal light deflection and greater concentration upon reaching the imaging plane. This defocusing corrects edge field aberrations, achieving high resolution while minimizing light energy loss and reducing lens sensitivity.

[0180] In this embodiment, the first side surface of the fifth lens is convex, and the second side surface is concave. The fifth lens has positive optical power; light rays are incident almost perpendicularly onto the second side surface of the fifth lens, resulting in a smooth light transition and minimal aberrations, which is beneficial for achieving high resolution and improving the resolving power of the optical system. The convex shape of the first side surface of the fifth lens collects light rays entering through the fourth lens, facilitating light convergence. Furthermore, the significant shape difference between the second side surface of the fourth lens and the first side surface of the fifth lens means that the fifth lens significantly alters the light trajectory, which helps to reduce the front aperture of the optical lens and achieve lens miniaturization.

[0181] In this embodiment, the first side surface of the sixth lens is convex, and the second side surface is convex. The sixth lens has positive optical power and a gentle shape, which can compress the angle of the incident light to achieve a smooth transition of light, allowing the diverging light to smoothly enter the rear, further making the light path transition smoothly, which is beneficial to reducing the aperture of the rear lens.

[0182] In this embodiment, the first and second sides of the seventh lens are concave. The seventh lens has negative optical power and diverges light rays, dispersing the light from each field of view, increasing system illumination, which is beneficial for correcting aberrations and achieving high resolution. The concave first and second sides of the seventh lens facilitate a smooth transition of light from the sixth lens, reducing light energy loss, increasing illumination in the peripheral field of view, and simultaneously altering the trajectory of edge light rays, thereby reducing the front aperture and overall size.

[0183] In this embodiment, the first side surface of the eighth lens is convex, and the second side surface is also convex. The eighth lens is preferably a glass aspherical lens, which has positive optical power, a biconvex shape, and a gentle lens shape, allowing diverging light rays to smoothly enter the rear, further smoothing the light path transition, improving astigmatism and field curvature in imaging, and enhancing the resolving power of the optical system.

[0184] In this embodiment, the ninth lens has positive optical power, and its first side surface is convex while its second side surface is concave. Preferably, the ninth lens is an aspherical lens. When the ninth lens has positive optical power and a convex-concave shape, it facilitates a smooth transition of light to the rear optical system, resulting in smaller aberrations and improved resolving power of the optical system.

[0185] In this embodiment, the ninth lens has negative optical power, and its first side surface is convex while its second side surface is concave. Preferably, the ninth lens is an aspherical lens, which has negative optical power and a convex-concave shape, allowing as many peripheral large-angle rays as possible to smoothly transition to the imaging plane, correcting astigmatism and field curvature, and improving the resolving power of the optical lens.

[0186] The optical lens of the present invention employs nine lenses. By optimizing the optical power and surface shape of each lens, the optical lens of the present invention has at least one beneficial effect, such as small aperture, high resolution, low sensitivity, low distortion, high light transmission, good confocal performance, and miniaturization.

[0187] In this embodiment, the second lens and the third lens are cemented together to form a cemented doublet; and / or the sixth lens and the seventh lens are cemented together to form a cemented doublet. By rationally configuring the cemented doublet, the light rays from the front lens can be smoothly transitioned to the rear optical system, reducing the overall system length. This allows for sufficient correction of various aberrations in the optical system, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Simultaneously, using a cemented doublet reduces the air gap between the two cemented lenses, further reducing the overall system length; the complementary dispersion of the two lenses helps reduce chromatic aberration and improve image quality; it also reduces the number of assembly components between the two lenses, reducing processes and lowering costs; furthermore, it reduces field curvature, which can correct off-axis point aberrations of the system. Rationally allocating the focal lengths of the two cemented lenses helps achieve thermal compensation and obtain good temperature performance.

[0188] In this embodiment, the optical lens also includes an aperture stop, which is disposed between the fourth lens and the fifth lens. By placing the aperture stop between the fourth lens and the fifth lens, it is beneficial to effectively converge the light entering the optical system, reduce the lens aperture at the rear end of the optical system, and reduce the assembly sensitivity of the system.

[0189] In this embodiment, the first side surface of the ninth lens is inverted. By properly setting the inversion, it is beneficial to balance aberrations and improve the resolving power of the optical lens.

[0190] In this embodiment, the eighth and ninth lenses are aspherical lenses. Using two aspherical lenses, preferably the eighth and ninth lenses, is beneficial for correcting system aberrations and improving resolving power.

[0191] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the condition: BFL / TTL ≥ 0.01. Satisfying this condition not only meets the specific requirements for the back focal length of the optical lens but also reserves space for the installation and focusing of optical components, avoiding interference between mechanisms. Preferably, BFL / TTL ≥ 0.05.

[0192] In this embodiment, the system focal lengths FR, FG, and FB of the optical lens at 650nm wavelength and 555nm wavelength respectively satisfy the condition (FR-FB) / FG ≤ 0.01. Meeting this condition ensures that the optical lens has similar focal lengths in both visible light and single-wavelength (R, G, B) applications, achieving cofocal focusing across a wide visible light band and single-wavelength (R, G, B) applications. Preferably, (FR-FB) / FG ≤ 0.005.

[0193] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: D / H / θ≤3. Satisfying this condition allows the optical lens to have a large target surface and small aperture characteristics under a fixed focal length. Preferably, D / H / θ≤1.5.

[0194] In this embodiment, the maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F ≤ 2.5. Satisfying this condition, under a fixed focal length, provides the optical lens with the characteristics of a large target surface and a small aperture. D / H / F ≤ 1.8.

[0195] In this embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5 ≤ TTL / F ≤ 30. If TTL / F is too small, the system sensitivity will be high; a larger TTL / F is beneficial for resolution and system sensitivity. Therefore, considering cost, miniaturization, system resolution, and sensitivity protection, a range is considered. Preferably, 8.5 ≤ TTL / F ≤ 15.

[0196] In this embodiment, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the condition: -2 ≤ R11 / R12 ≤ -0.05. By rationally configuring the radius of curvature of the sixth lens, the light collected by the fifth lens is compressed, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves system imaging quality. If the value is below the lower limit of the condition, the incident angle of the light rays incident on the first side surface of the sixth lens increases, leading to a decrease in relative illumination. Therefore, satisfying this condition allows for the acquisition of a high-quality, bright image. Preferably, -1.5 ≤ R11 / R12 ≤ -0.3.

[0197] In this embodiment, the radius of curvature R14 of the first side surface of the eighth lens and the maximum effective aperture D14 of the first side surface of the eighth lens satisfy the following relationship: 1 ≤ R14 / D14 ≤ 4. By reasonably setting the ratio of the lens's radius of curvature to its aperture, it is beneficial to reduce the height of the light entering the eighth lens (small R value), achieving a small aperture, while also considering the lens's manufacturability (the R value cannot be too small). Preferably, 1.2 ≤ R14 / D14 ≤ 3.

[0198] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the condition: (R1-R2) / (R1+R2)≤0.85. Satisfying this condition corrects aberrations in the optical system and ensures that the incident light rays from the first lens are relatively smooth when incident on the first side surface of the second lens, thereby reducing the tolerance sensitivity of the optical system. Preferably, (R1-R2) / (R1+R2)≤0.7.

[0199] In this embodiment, the maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the condition: D1 / TTL≤0.4. Satisfying this condition ensures a small front aperture, enabling miniaturization. Preferably, D1 / TTL≤0.39.

[0200] In this embodiment, the image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: |(HF×θ) / (F×θ)|≤0.3. Satisfying this condition ensures that, while keeping the field of view and image plane size constant, increasing the focal length of the optical lens enhances the imaging effect in the central region of the image plane. Preferably, |(HF×θ) / (F×θ)|≤0.25.

[0201] In this embodiment, the entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: ENPD / H ≥ 0.05. Satisfying this condition ensures that, with the field of view and image plane size of the optical lens remaining constant, a larger entrance pupil diameter is beneficial for increasing light transmission and improving relative illumination. Preferably, ENPD / H ≥ 0.15.

[0202] In this embodiment, the focal length F5 of the fifth lens satisfies the condition F5 / F≥1 with the total focal length F of the optical lens. Satisfying this condition facilitates the rational allocation of the fifth lens's focal length, allowing light to enter the optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, F5 / F≥2.

[0203] In this embodiment, 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: 0.1 ≤ F / H ≤ 1. Controlling the focal length and image height of the optical lens within a certain range is beneficial to improving resolving power. Preferably, 0.3 ≤ F / H ≤ 0.7.

[0204] In this embodiment, the angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: arctan(1 / K(S2))≥35°. Satisfying this condition ensures a large angle subtended by the second side of the first lens, which is beneficial for the rapid focusing of large-angle peripheral light rays entering through the first lens, thus improving image quality. Preferably, arctan(1 / K(S2))≥45°.

[0205] In this embodiment, the center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3 ≤ 2.5. Satisfying this condition ensures that the center thicknesses of the two lenses are similar, which helps to minimize the light refraction variation of the overall optical lens under high and low temperatures, resulting in excellent temperature performance. Preferably, d4 / d3 ≤ 2.2.

[0206] In this embodiment, the focal length F6 of the sixth lens satisfies the condition F6 / F≥0.8 with the overall focal length F of the optical lens. By rationally allocating the focal length of the sixth lens, light can enter the rear optical system smoothly, while also improving light collection, ensuring sufficient light transmission, and enhancing resolution. Preferably, F6 / F≥1.

[0207] In this embodiment, the sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the condition: |SAG2 / SAG1|≥1.5. Satisfying this condition means that the sagitta of the two sides of the first lens differs significantly, which is beneficial for the first lens to collect light, allowing the light to smoothly transition to the rear, and effectively reducing system aberrations and improving the system's imaging quality.

[0208] In this embodiment, the radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the condition: R15 / R17≥0.1. By rationally configuring the radius of curvature of the ninth lens, the light collected by the eighth lens is prevented from diverging excessively, resulting in a relatively smooth light path and a stable transition of light to the rear. This effectively reduces system aberrations and improves the system's imaging quality. Preferably, R15 / R17≥0.4.

[0209] Optionally, the aforementioned optical lens may also include a color filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0210] The optical lens in this application can employ multiple lenses, such as the nine lenses mentioned above. This application does not specifically limit the number of spherical and aspherical lenses; the number of aspherical lenses can be increased when image quality is a primary concern. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have superior curvature radius characteristics, offering advantages in improving distortion and astigmatism. Using aspherical lenses can minimize aberrations that occur during imaging, thereby improving image quality.

[0211] In this exemplary embodiment, the solution is not limited to using plastic or glass for the lenses. If temperature performance is a primary concern, all nine lenses can be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing disruption to the normal use of the optical lens. For example, an all-glass optical lens has a wider temperature range, maintaining stable optical performance within the range of -40℃ to 105℃. Specifically, when resolution and reliability are of primary concern, all nine lenses can be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, all nine lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to ninth lenses in the optical lens can also be made of a combination of plastic and glass.

[0212] This application also provides an electronic device, including the aforementioned optical lens and an imaging element that converts 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.

[0213] 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 nine lenses are described as an example in the embodiments, the optical lens is not limited to including nine lenses. If necessary, the optical lens may also include other numbers of lenses.

[0214] 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.

[0215] It should be noted that any of the examples one through ten below are applicable to all embodiments of this application.

[0216] Example 1

[0217] like Figure 1 The diagram shown is a schematic of the optical lens structure of Example 1.

[0218] like Figure 1 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0219] The first lens L1 has negative 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 concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0220] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0221] In this example, the total effective focal length F of the optical lens is 7.954mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.003mm.

[0222] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0223]

[0224]

[0225] Table 1

[0226] In Example 1, the surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0227]

[0228] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A, B, C, D, and E are all higher-order coefficients. Table 2 below shows the conic coefficient k and the higher-order coefficients A, B, C, D, E, F, and G for the aspherical lens surfaces S14, S15, S16, and S17 in Example 1.

[0229]

[0230] Table 2

[0231] Example 2

[0232] like Figure 2 The diagram shown is a schematic of the optical lens structure for Example 2. For the sake of brevity, descriptions similar to those in Example 1 will be omitted in this example and the following examples.

[0233] like Figure 2 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0234] The first lens L1 has negative 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 concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0235] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0236] In this example, the total effective focal length F of the optical lens is 7.920mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.003mm.

[0237] Table 3 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).

[0238] Surf Radius Thickness Nd Vd 1 48.081 1.498 1.80 46.58 2 11.300 6.651 3 -18.875 5.533 1.95 17.94 4 61.768 9.517 1.90 31.32 5 -24.161 6.289 6 28.447 3.134 1.95 17.94 7 130.847 11.783 STO Infinity 3.001 9 15.866 3.000 1.44 94.58 10 -21.069 0.100 11 13.622 2.550 1.44 94.58 12 -10.474 1.000 1.81 25.47 13 12.812 5.017 14 24.290 6.030 1.81 41.00 15 -9.215 -0.017 16 11.735 2.136 1.74 49.34 17 5.137 3.906 18 Infinity 1.000 1.52 64.17 19 Infinity 0.876 IMA / /

[0239] Table 3

[0240] Table 4 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 2.

[0241]

[0242] Table 4

[0243] Example 3

[0244] like Figure 3 The diagram shown is a schematic of the optical lens structure in Example 3.

[0245] like Figure 3 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0246] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0247] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0248] In this example, the total effective focal length F of the optical lens is 7.696mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.001mm.

[0249] Table 5 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).

[0250]

[0251]

[0252] Table 5

[0253] Table 6 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 3.

[0254]

[0255] Table 6

[0256] Example 4

[0257] like Figure 4 The diagram shown is a schematic of the optical lens structure of Example 4.

[0258] like Figure 4 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0259] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0260] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0261] In this example, the total effective focal length F of the optical lens is 7.675mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.001mm.

[0262] Table 7 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).

[0263] Surf Radius Thickness Nd Vd 1 27.221 1.499 1.80 46.58 2 10.072 7.048 3 -15.400 5.097 3.85 49.26 4 -80.212 9.504 1.90 31.32 5 -20.295 11.805 6 15.271 9.258 1.95 17.94 7 12.799 0.576 STO Infinity 3.001 9 10.892 2.957 1.44 94.58 10 -85.858 0.100 11 10.734 3.453 1.44 94.58 12 -10.007 1.000 1.81 25.47 13 15.583 3.464 14 14.551 6.216 1.81 41.00 15 -10.860 0.052 16 23.624 2.136 1.74 49.34 17 7.179 3.960 18 Infinity 1.000 1.52 64.17 19 Infinity 0.877 IMA / /

[0264] Table 7

[0265] Table 8 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 4.

[0266]

[0267] Table 8

[0268] Example 5

[0269] like Figure 5 The diagram shown is a schematic of the optical lens structure of Example 5.

[0270] like Figure 5 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0271] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has negative optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0272] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0273] In this example, the total effective focal length F of the optical lens is 7.334mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 75.003mm.

[0274] Table 9 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).

[0275]

[0276]

[0277] Table 9

[0278] Table 10 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 5.

[0279]

[0280] Table 10

[0281] Example 6

[0282] like Figure 6 The diagram shown is a schematic of the optical lens structure of Example 6.

[0283] like Figure 6 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0284] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has positive optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has negative optical power, its first side surface S6 is convex, and its second side surface S7 is concave. The fifth lens L5 has positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0285] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0286] In this example, the total effective focal length F of the optical lens is 7.174mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 75.003mm.

[0287] Table 11 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).

[0288] Surf Radius Thickness Nd Vd 1 48.026 1.600 1.80 46.57 2 13.575 12.928 3 -26.470 6.000 1.95 17.94 4 -79.416 10.000 1.90 31.32 5 -25.032 10.431 6 13.367 9.592 1.95 17.94 7 7.615 0.582 STO Infinity 0.100 9 8.599 2.337 1.44 94.58 10 36.144 0.451 11 8.677 3.777 1.44 94.58 12 -8.575 0.650 1.81 25.47 13 21.977 2.562 14 13.821 6.314 1.81 41.00 15 -8.964 0.100 16 8.830 2.200 1.74 49.34 17 4.473 3.500 18 Infinity 1.000 1.52 64.17 19 Infinity 0.879 IMA / /

[0289] Table 11

[0290] Table 12 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example Six.

[0291]

[0292] Table 12

[0293] Example 7

[0294] like Figure 7 The diagram shown is a schematic of the optical lens structure of Example 7.

[0295] like Figure 7 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0296] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 concave. The eighth lens L8 has positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0297] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0298] In this example, the total effective focal length F of the optical lens is 7.407mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.000mm.

[0299] Table 13 shows the basic structural parameters of the optical lens of Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm).

[0300] Surf Radius Thickness Nd Vd 1 48.834 1.600 1.80 46.57 2 12.829 14.502 3 -45.690 6.000 1.90 31.32 4 -13.350 12.245 1.95 17.94 5 -33.612 0.100 6 33.916 6.159 1.95 17.94 7 100.000 10.855 STO Infinity 0.161 9 -46.915 2.068 1.44 94.58 10 -17.130 0.100 11 7.945 4.065 1.44 94.58 12 -11.085 1.400 1.81 25.47 13 12.544 1.814 14 12.827 4.252 1.81 41.00 15 -9.488 0.100 16 19.213 2.200 1.74 49.34 17 5.001 3.500 18 Infinity 1.000 1.52 64.17 19 Infinity 0.880 IMA / /

[0301] Table 13

[0302] Table 14 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 7.

[0303]

[0304] Table 14

[0305] Example 8

[0306] like Figure 8 The diagram shown is a schematic of the optical lens structure of Example 8.

[0307] like Figure 8 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0308] The first lens L1 has negative 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 concave, and its second side surface S4 is convex. The third lens L3 has negative optical power, its first side surface S4 is concave, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 concave. The eighth lens L8 has positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has negative optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0309] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0310] In this example, the total effective focal length F of the optical lens is 7.399mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 73.004mm.

[0311] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0312]

[0313]

[0314] Table 15

[0315] Table 16 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 8.

[0316]

[0317] Table 16

[0318] Example 9

[0319] like Figure 9 The diagram shown is a schematic of the optical lens structure of Example 9.

[0320] like Figure 9 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0321] The first lens L1 has negative 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 concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has positive optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0322] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0323] In this example, the total effective focal length F of the optical lens is 8.019mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 71.249mm.

[0324] Table 17 shows the basic structural parameters of the optical lens of Example 9, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0325] Surf Radius Thickness Nd Vd 1 47.139 4.000 1.80 46.59 2 10.389 6.608 3 -14.352 5.500 1.95 17.94 4 51.095 9.500 1.90 31.32 5 -21.752 1.749 6 30.813 3.629 1.95 17.94 7 392.692 13.662 STO Infinity 0.473 9 24.913 2.521 1.44 94.58 10 -25.813 0.100 11 11.496 2.571 1.44 94.58 12 -14.743 1.000 1.81 25.48 13 14.111 5.233 14 21.584 4.135 1.81 41.00 15 -2067.386 1.693 16 9.868 3.000 1.74 49.34 17 11.848 4.000 18 Infinity 1.000 1.52 64.21 19 Infinity 0.876 IMA / /

[0326] Table 17

[0327] Table 18 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 9.

[0328]

[0329]

[0330] Table 18

[0331] Example 10

[0332] like Figure 10 The diagram shown is a schematic of the optical lens structure of Example 10.

[0333] like Figure 10 As shown, the optical lens includes, from the first side to the second side, the following components in sequence: first lens L1, second lens L2, third lens L3, fourth lens L4, aperture STO, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, ninth lens L9, first side surface S18 of the protective glass, second side surface S19 of the protective glass, and imaging surface IMA.

[0334] The first lens L1 has negative 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 concave, and its second side surface S4 is concave. The third lens L3 has positive optical power, its first side surface S4 is convex, and its second side surface S5 is convex. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is concave. 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 positive optical power. Its first side surface S14 and second side surface S15 are both convex. The ninth lens L9 has positive optical power. Its first side surface S16 is convex, and its second side surface S17 is concave. Light from the first side passes sequentially through surfaces S1 to S19 and is ultimately imaged onto the imaging plane IMA.

[0335] In this example, since the second lens L2 and the third lens L3 are cemented together to form a cemented doublet, the second side surface S4 of the second lens and the first side surface S4 of the third lens are the same surface. Since the sixth lens L6 and the seventh lens L7 are cemented together to form a cemented doublet, the second side surface S12 of the sixth lens and the first side surface S12 of the seventh lens are the same surface.

[0336] In this example, the total effective focal length F of the optical lens is 8.003mm, the maximum field of view (FOV) of the optical lens is 90.800°, and the total length (TTL) of the optical lens is 71.076mm.

[0337] Table 19 shows the basic structural parameters of the optical lens of Example 10, where the units for radius of curvature and thickness / distance are millimeters (mm).

[0338]

[0339]

[0340] Table 19

[0341] Table 20 below shows the conic coefficient k and the coefficients A, B, C, D, E, F, and G of each higher-order term that can be used for the aspherical lens surfaces S14, S15, S16, and S17 in Example 10.

[0342]

[0343] Table 20

[0344] In summary, Examples 1 through 2 completely satisfy the relationships shown in Table 21.

[0345]

[0346]

[0347] Table 21

[0348] Table 22 gives the effective focal length F, total optical length TTL, etc. of the optical lenses for Examples 1 to 10 (unit: mm).

[0349] Parameters / Examples 1 2 3 4 5 6 7 8 9 10 F 7.954 7.920 7.696 7.675 7.334 7.174 7.407 7.399 8.019 8.003 ENPD 3.977 3.960 3.848 3.838 3.667 3.587 3.704 3.699 4.009 4.002 TTL 73.003 73.003 73.001 73.001 75.003 75.003 73.000 73.004 71.249 71.076 FOV 90.800 90.800 90.800 90.800 90.800 90.800 90.800 90.800 90.800 90.800 θ 1.585 1.585 1.585 1.585 1.585 1.585 1.585 1.585 1.585 1.585 H 13.656 13.673 13.714 13.673 13.660 13.732 13.690 13.700 13.752 13.696 D 23.282 23.252 22.183 22.133 28.609 28.279 27.478 27.740 24.138 24.074 F1 -18.640 -18.640 -20.611 -20.611 -24.283 -23.943 -21.993 -22.297 -17.241 -17.241 F2 -14.642 -14.642 -20.747 -20.747 -43.996 -43.996 19.067 19.067 -11.066 -11.066 F3 20.173 20.173 27.720 27.793 36.982 36.982 -32.891 -32.891 17.726 17.726 F4 37.249 37.488 99.781 99.781 -92.396 -100.000 51.381 50.618 34.220 34.222 F5 21.157 21.157 22.342 22.243 25.073 25.073 60.235 60.566 29.251 29.251 F6 13.949 13.949 12.438 12.438 10.535 10.535 11.285 11.285 15.131 15.131 F7 -6.973 -6.973 -7.386 -7.386 -7.535 -7.535 -7.069 -7.069 -8.648 -8.648 F8 8.951 8.932 8.586 8.586 7.632 7.632 7.330 7.330 26.080 26.080 F9 -14.212 -14.212 -14.634 -14.634 -15.136 -15.489 -9.703 -9.838 47.678 47.678 R1 48.081 48.081 27.221 27.221 48.026 48.026 48.834 48.834 47.139 47.139 R2 11.300 11.300 10.072 10.072 13.713 13.575 12.829 12.958 10.389 10.389 R8 130.847 130.847 12.799 12.799 7.538 7.615 100.000 100.000 392.692 392.692 R11 13.622 13.622 10.734 10.734 8.677 8.677 7.945 7.945 11.496 11.496 R12 -10.474 -10.474 -10.007 -10.007 -8.575 -8.575 -11.085 -11.085 -14.743 -14.743 R14 12.812 12.812 15.583 15.583 21.977 21.977 12.544 12.544 14.111 14.111 d3 5.533 5.533 5.097 5.097 6.000 6.000 6.000 6.000 5.500 5.500 SAG1 1.430 1.427 2.362 2.351 2.180 2.129 1.973 2.011 1.571 1.563 SAG2 4.418 4.407 4.562 4.540 5.638 5.554 5.504 5.563 3.983 3.958 FR 7.964 7.930 7.706 7.684 7.346 7.187 7.423 7.416 8.030 8.016 FB 7.954 7.920 7.696 7.675 7.334 7.174 7.407 7.399 8.019 8.002 FG 7.946 7.911 7.689 7.668 7.331 7.168 7.392 7.381 8.022 8.006 d4 9.517 9.517 9.504 9.504 10.000 10.000 12.245 12.245 9.500 9.500 D1 23.282 23.252 22.183 22.133 28.609 28.279 27.478 27.740 24.138 24.074 D14 9.169 9.156 9.858 9.832 10.170 9.898 8.910 8.858 9.130 9.124 BFL 5.782 5.782 5.836 5.837 5.379 5.379 5.380 5.384 5.876 5.876 R15 24.535 24.290 14.551 14.551 13.821 13.821 12.827 12.827 21.584 21.584 R17 11.735 11.735 23.624 23.624 8.830 8.830 19.213 19.213 9.868 9.868 arctan(1 / K(S2)) 52.482 52.408 56.836 56.687 53.927 53.779 55.183 55.199 51.928 51.757

[0350] Table 22

[0351] 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.

[0352] 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.

[0353] 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.

[0354] 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 a total of nine lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface is concave; A second lens having optical power, wherein the first side surface of the second lens is concave. A third lens with optical power, wherein the second side surface of the third lens is convex; A fourth lens with optical power, wherein the first side of the fourth lens is convex and the second side is concave; A fifth lens with positive optical power; A sixth lens with positive optical power, wherein the first side surface of the sixth lens is convex and the second side surface is convex; A seventh lens with negative optical power, wherein the first side surface of the seventh lens is concave and the second side surface is concave; An eighth lens with positive optical power, wherein the first side surface of the eighth lens is convex and the second side surface is convex; A ninth lens with optical power, wherein the first side surface of the ninth lens is convex and the second side surface is concave; The second lens and the third lens have opposite optical powers; The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5≤TTL / F≤15.

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

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

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

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

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

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

8. The optical lens according to claim 1, characterized in that, The fourth lens has positive optical power.

9. The optical lens according to claim 1, characterized in that, The fourth lens has negative optical power.

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

11. The optical lens according to claim 1, characterized in that, The first side of the fifth lens is concave, and the second side is convex.

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

13. The optical lens according to claim 1, characterized in that, The ninth lens has positive optical power.

14. The optical lens according to claim 1, characterized in that, The ninth lens has negative optical power.

15. The optical lens according to claim 1, characterized in that, The second lens is cemented with the third lens to form a cemented doublet lens; and / or the sixth lens is cemented with the seventh lens to form a cemented doublet lens.

16. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is disposed between the fourth lens and the fifth lens.

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

18. The optical lens according to claim 1, characterized in that, The eighth lens and the ninth lens are aspherical lenses.

19. The optical lens according to any one of claims 1 to 18, characterized in that, The optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.01≤BFL / TTL≤0.

083.

20. The optical lens according to any one of claims 1 to 18, characterized in that, The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.

01.

21. The optical lens according to any one of claims 1 to 18, 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 radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / θ≤1.

5.

22. The optical lens according to any one of claims 1 to 18, 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 image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤1.

8.

23. The optical lens according to any one of claims 1 to 18, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 8.5≤TTL / F≤15.

24. The optical lens according to any one of claims 1 to 18, characterized in that, The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -2≤R11 / R12≤-0.

05.

25. The optical lens according to any one of claims 1 to 18, characterized in that, The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1≤R14 / D14≤4.

26. The optical lens according to any one of claims 1 to 18, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.

85.

27. The optical lens according to any one of claims 1 to 18, characterized in that, The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following: D1 / TTL≤0.

4.

28. The optical lens according to any one of claims 1 to 18, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: |(HF×θ) / (F×θ)|≤0.

3.

29. The optical lens according to any one of claims 1 to 18, characterized in that, The entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.15≤ENPD / H≤0.

292.

30. The optical lens according to any one of claims 1 to 18, characterized in that, The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F5 / F≤8.

186.

31. The optical lens according to any one of claims 1 to 18, 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 relationship: 0.1≤F / H≤1.

32. The optical lens according to any one of claims 1 to 18, characterized in that, The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 35≤arctan(1 / K(S2))≤56.

836.

33. The optical lens according to any one of claims 1 to 18, characterized in that, The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3≤2.

5.

34. The optical lens according to any one of claims 1 to 18, characterized in that, The radius of curvature R8 of the second side of the fourth lens satisfies the following condition with respect to the focal length F of the optical lens: 0.05≤R8 / F≤49.

068.

35. The optical lens according to any one of claims 1 to 18, characterized in that, The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.8 ≤ F6 / F ≤ 1.

891.

36. The optical lens according to any one of claims 1 to 18, characterized in that, The sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: 1.5≤|SAG2 / SAG1|≤3.

089.

37. The optical lens according to any one of claims 1 to 18, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 0.1≤R15 / R17≤1.

891.

38. The optical lens according to any one of claims 1 to 18, characterized in that, The optical lens meets any of the following criteria: The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.05≤BFL / TTL≤0.

083. The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.005; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.021≤D / H / θ≤1.5; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.210≤D / H / F≤1.8; The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -1.5 ≤ R11 / R12 ≤ -0.3; The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1.2≤R14 / D14≤3; The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.7; The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.303≤D1 / TTL≤0.39; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF×θ) / (F×θ)|≤0.25; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤F5 / F≤8.186; 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: 0.3≤F / H≤0.7; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 45 ≤ arctan(1 / K(S2)) ≤ 56.836; The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the following condition: 1.667 ≤ d4 / d3 ≤ 2.2; The radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.2≤R8 / F≤49.068; The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F6 / F≤1.891; The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 0.4 ≤ R15 / R17 ≤ 1.

891.

39. The optical lens according to any one of claims 1 to 18, characterized in that, The optical lens meets any of the following criteria: The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.072≤BFL / TTL≤0.

083. The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: 0.001≤(FR-FB) / FG≤0.

002. The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.021≤D / H / θ≤1.322; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.210≤D / H / F≤0.

287. The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: 8.881≤TTL / F≤10.454; The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -1.301≤R11 / R12≤-0.717; The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1.397≤R14 / D14≤2.220; The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: 0.460≤(R1-R2) / (R1+R2)≤0.639; The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.303≤D1 / TTL≤0.381; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.080≤|(HF*θ) / (F*θ)|≤0.208; The entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.261≤ENPD / H≤0.292; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2.660≤F5 / F≤8.186; 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: 0.522≤F / H≤0.584; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 51.757≤arctan(1 / K(S2))≤56.836; The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the following condition: 1.667 ≤ d4 / d3 ≤ 2.041; The radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 1.028≤R8 / F≤49.068; The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 1.436 ≤ F6 / F ≤ 1.891; The sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: 1.931≤|SAG2 / SAG1|≤3.089; The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 1.553 ≤ R15 / R17 ≤ 1.

891.

40. An optical lens, characterized in that, The optical lens has a total of nine lenses, which are sequentially arranged from the first side to the second side as follows: A first lens with negative optical power; A second lens with optical power; A third lens with optical power; A fourth lens with optical power; A fifth lens with positive optical power; A sixth lens with positive optical power; A seventh lens with negative optical power; An eighth lens with positive optical power; A ninth lens with optical power; Wherein, the radius of curvature R8 of the second side surface of the fourth lens and the total focal length F of the optical lens satisfy the following condition: R8 / F≥0.05; The second lens and the third lens have opposite optical powers; The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 7.5≤TTL / F≤15.

41. The optical lens according to claim 40, characterized in that, The first side of the first lens is convex, and the second side is concave.

42. The optical lens according to claim 40, characterized in that, The second lens has negative optical power, and the first side surface of the second lens is concave, and the second side surface is concave.

43. The optical lens according to claim 40, characterized in that, The second lens has negative optical power, and the first side of the second lens is concave and the second side is convex.

44. The optical lens according to claim 40, characterized in that, The second lens has positive optical power, and the first side of the second lens is concave and the second side is convex.

45. The optical lens according to claim 40, characterized in that, The third lens has negative optical power, and the first side of the third lens is concave and the second side is convex.

46. ​​The optical lens according to claim 40, characterized in that, The third lens has positive optical power, and the first side of the third lens is concave and the second side is convex.

47. The optical lens according to claim 40, characterized in that, The third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface is convex.

48. The optical lens according to claim 40, characterized in that, The fourth lens has positive optical power, and the first side of the fourth lens is convex and the second side is concave.

49. The optical lens according to claim 40, characterized in that, The fourth lens has negative optical power, and the first side of the fourth lens is convex and the second side is concave.

50. The optical lens according to claim 40, characterized in that, The first side surface of the fifth lens is convex, and the second side surface is convex.

51. The optical lens according to claim 40, characterized in that, The first side of the fifth lens is concave, and the second side is convex.

52. The optical lens according to claim 40, characterized in that, The first side of the fifth lens is convex, and the second side is concave.

53. The optical lens according to claim 40, characterized in that, The first side surface of the sixth lens is convex, and the second side surface is convex.

54. The optical lens according to claim 40, characterized in that, The first side surface of the seventh lens is concave, and the second side surface is concave.

55. The optical lens according to claim 40, characterized in that, The first side surface of the eighth lens is convex, and the second side surface is convex.

56. The optical lens according to claim 40, characterized in that, The ninth lens has positive optical power, and the first side of the ninth lens is convex and the second side is concave.

57. The optical lens according to claim 40, characterized in that, The ninth lens has negative optical power, and the first side of the ninth lens is convex and the second side is concave.

58. The optical lens according to claim 40, characterized in that, The second lens is cemented with the third lens to form a cemented doublet lens; and / or the sixth lens is cemented with the seventh lens to form a cemented doublet lens.

59. The optical lens according to claim 40, characterized in that, The optical lens also includes an aperture stop, which is disposed between the fourth lens and the fifth lens.

60. The optical lens according to claim 40, characterized in that, The first side surface of the ninth lens is curved.

61. The optical lens according to claim 40, characterized in that, The eighth lens and the ninth lens are aspherical lenses.

62. The optical lens according to any one of claims 40 to 61, characterized in that, The optical total length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.01≤BFL / TTL≤0.

083.

63. The optical lens according to any one of claims 40 to 61, characterized in that, The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.

01.

64. The optical lens according to any one of claims 40 to 61, 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 radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: D / H / θ≤1.

5.

65. The optical lens according to any one of claims 40 to 61, 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 image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: D / H / F≤1.

8.

66. The optical lens according to any one of claims 40 to 61, characterized in that, The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: 8.5≤TTL / F≤15.

67. The optical lens according to any one of claims 40 to 61, characterized in that, The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -2≤R11 / R12≤-0.

05.

68. The optical lens according to any one of claims 40 to 61, characterized in that, The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1≤R14 / D14≤4.

69. The optical lens according to any one of claims 40 to 61, characterized in that, The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.

85.

70. The optical lens according to any one of claims 40 to 61, characterized in that, The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following: D1 / TTL≤0.

4.

71. The optical lens according to any one of claims 40 to 61, characterized in that, The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following: |(HF×θ) / (F×θ)|≤0.

3.

72. The optical lens according to any one of claims 40 to 61, characterized in that, The entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.15≤ENPD / H≤0.

292.

73. The optical lens according to any one of claims 40 to 61, characterized in that, The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F5 / F≤8.

186.

74. The optical lens according to any one of claims 40 to 61, 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 relationship: 0.1≤F / H≤1.

75. The optical lens according to any one of claims 40 to 61, characterized in that, The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 35≤arctan(1 / K(S2))≤56.

836.

76. The optical lens according to any one of claims 40 to 61, characterized in that, The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the condition: d4 / d3≤2.

5.

77. The optical lens according to any one of claims 40 to 61, characterized in that, The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 0.8 ≤ F6 / F ≤ 1.

891.

78. The optical lens according to any one of claims 40 to 61, characterized in that, The sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: 1.5≤|SAG2 / SAG1|≤3.

089.

79. The optical lens according to any one of claims 40 to 61, characterized in that, The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 0.1≤R15 / R17≤1.

891.

80. The optical lens according to any one of claims 40 to 61, characterized in that, The optical lens meets any of the following criteria: The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.05≤BFL / TTL≤0.

083. The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: (FR-FB) / FG≤0.005; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.021≤D / H / θ≤1.5; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.210≤D / H / F≤1.8; The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -1.5 ≤ R11 / R12 ≤ -0.3; The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1.2≤R14 / D14≤3; The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: (R1-R2) / (R1+R2)≤0.7; The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging plane of the optical lens, satisfy the following condition: 0.303≤D1 / TTL≤0.39; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF×θ) / (F×θ)|≤0.25; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2≤F5 / F≤8.186; 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: 0.3≤F / H≤0.7; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 45 ≤ arctan(1 / K(S2)) ≤ 56.836; The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the following condition: 1.667 ≤ d4 / d3 ≤ 2.2; The radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 0.2≤R8 / F≤49.068; The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 1≤F6 / F≤1.891; The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 0.4 ≤ R15 / R17 ≤ 1.

891.

81. The optical lens according to any one of claims 40 to 61, characterized in that, The optical lens meets any of the following criteria: The total optical length of the optical lens, i.e., the distance TTL from the center of the first side of the first lens of the optical lens to the center of the imaging plane of the optical lens, and the optical back focal length of the optical lens, i.e., the distance BFL from the center of the second side of the last lens of the optical lens to the center of the imaging plane, satisfy the following condition: 0.072≤BFL / TTL≤0.

083. The system focal length FR of the optical lens at a wavelength of 650nm, the system focal length FG of the optical lens at a wavelength of 555nm, and the system focal length FB of the optical lens at a wavelength of 440nm satisfy the following condition: 0.001≤(FR-FB) / FG≤0.

002. The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the radian value θ corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 1.021≤D / H / θ≤1.322; The maximum aperture D of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the total focal length F of the optical lens satisfy the following condition: 0.210≤D / H / F≤0.

287. The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: 8.881≤TTL / F≤10.454; The radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens satisfy the following condition: -1.301≤R11 / R12≤-0.717; The radius of curvature R14 of the second side of the seventh lens and the maximum effective aperture D14 of the first side of the eighth lens satisfy the following condition: 1.397≤R14 / D14≤2.220; The radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy the following condition: 0.460≤(R1-R2) / (R1+R2)≤0.639; The maximum effective aperture D1 of the first side of the first lens and the total optical length of the optical lens, that is, the distance TTL from the center of the first side of the first lens to the center of the imaging surface of the optical lens, satisfy the following condition: 0.303≤D1 / TTL≤0.381; The image height H corresponding to the maximum field of view of the optical lens, the total focal length F of the optical lens, and the radian value θ corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.080≤|(HF*θ) / (F*θ)|≤0.208; The entrance pupil diameter ENPD of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: 0.261≤ENPD / H≤0.292; The focal length F5 of the fifth lens satisfies the following relationship with the total focal length F of the optical lens: 2.660≤F5 / F≤8.186; 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: 0.522≤F / H≤0.584; The angle subtended by the second side of the first lens, arctan(1 / K(S2)), satisfies: 51.757≤arctan(1 / K(S2))≤56.836; The center thickness d3 of the second lens and the center thickness d4 of the third lens satisfy the following condition: 1.667 ≤ d4 / d3 ≤ 2.041; The radius of curvature R8 of the second side of the fourth lens satisfies the following relationship with the total focal length F of the optical lens: 1.028≤R8 / F≤49.068; The focal length F6 of the sixth lens satisfies the following relationship with the total focal length F of the optical lens: 1.436 ≤ F6 / F ≤ 1.891; The sagitta SAG1 of the first side surface of the first lens and the sagitta SAG2 of the second side surface of the first lens satisfy the following condition: 1.931≤|SAG2 / SAG1|≤3.089; The radius of curvature R15 of the first side surface of the eighth lens and the radius of curvature R17 of the first side surface of the ninth lens satisfy the following condition: 1.553 ≤ R15 / R17 ≤ 1.

891.

82. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1 to 81 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images