Optical lenses and electronic devices containing them

Abstract

This invention provides an optical lens and an electronic device having the same. The optical lens includes: a first lens with negative optical power, a first convex side, and a second concave side; a second lens with negative optical power and a second concave side; a third lens with negative optical power, a first concave side, and a second concave side; a fourth lens with positive optical power, a first convex side, and a second convex side; a fifth lens with a first convex side and a second concave side; a sixth lens with a first concave side; a seventh lens with positive optical power, a first convex side, and a second convex side; an eighth lens with negative optical power, a first concave side, and a second concave side; and a ninth lens with positive optical power, a first convex side, and a second convex side. This invention solves at least one of the problems of existing optical lenses, including resolving aberration, small field of view, poor temperature performance, large size, and difficulty in achieving day and night confocal focusing.

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 having the same. Background Technology

[0002] With the development of technology, the application scenarios of optical lenses are gradually increasing, and users' requirements for the optical performance of optical lenses are also gradually increasing. Smaller optical lenses are easier to install, but there is a contradiction between resolution and miniaturization. Furthermore, the application environment of optical lenses may have large temperature differences, such as high temperatures in summer and low temperatures in winter. Under such conditions, optical lenses will experience image plane shift due to temperature changes, causing blurring and affecting normal use. With the rapid development of autonomous driving assistance systems, automotive lenses, as key components for acquiring external information, also face higher requirements for optical performance. Especially in actual road detection, automotive lenses need to have good recognition capabilities for objects of different colors, have high requirements for chromatic aberration, and meet the requirement of day and night confocality to adapt to richer application scenarios. However, existing automotive lenses cannot simultaneously meet the requirements of high resolution and miniaturization, cannot meet the requirement of clear imaging under large temperature differences, have insufficient light transmission capabilities, cannot adapt to dark environments such as night or rainy days, and cannot simultaneously meet the requirements of large aperture and high resolution.

[0003] In other words, existing optical lenses suffer from at least one of the following problems: resolution aberration, small field of view, poor temperature performance, large size, and difficulty in achieving day and night cofocus. Summary of the Invention

[0004] The main objective of this invention is to provide an optical lens and an electronic device having the same, so as to solve at least one of the problems of existing optical lenses, such as resolution aberration, small field of view, poor temperature performance, large size, and difficulty in achieving day and night confocal focus.

[0005] To achieve the above objectives, according to one aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; a second lens having negative optical power, and a second side surface of the second lens being concave; a third lens having negative optical power, and a first side surface of the third lens being concave, and a second side surface of the third lens being concave; a fourth lens having positive optical power, and a first side surface of the fourth lens being convex, and a second side surface of the fourth lens being convex; a fifth lens having optical power, and a first side surface of the fifth lens being convex, and a second side surface of the fifth lens being concave; a sixth lens having optical power, and a first side surface of the sixth lens being concave; a seventh lens having positive optical power, and a first side surface of the seventh lens being convex, and a second side surface of the seventh lens being convex; an eighth lens having negative optical power, and a first side surface of the eighth lens being concave, and a second side surface of the eighth lens being concave; and a ninth lens having positive optical power, and a first side surface of the ninth lens being convex, and a second side surface of the ninth lens being convex.

[0006] Furthermore, the first side surface of the second lens is convex.

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

[0008] Furthermore, the fifth lens has positive optical power.

[0009] Furthermore, the fifth lens has negative optical power.

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

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

[0012] Furthermore, at least two of the lenses from the first to the ninth lens are aspherical lenses.

[0013] Furthermore, the fifth, sixth, and ninth lenses are aspherical lenses.

[0014] Furthermore, the third and fourth lenses are cemented together to form a cemented lens, and the seventh and eighth lenses are cemented together to form a cemented lens.

[0015] Furthermore, the optical lens also includes an aperture stop, which is located between the fifth and sixth lenses.

[0016] Furthermore, the first side surface of the sixth lens has a recurved point.

[0017] Furthermore, the second side surface of the fifth lens has a recurve point, and the first side surface of the sixth lens has a recurve point.

[0018] Furthermore, the maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV≤0.1.

[0019] Furthermore, the maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.5.

[0020] Furthermore, the maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following relationship: |(H / 2) / (F*tan(θ / 2))|≤1.

[0021] Furthermore, the radius of curvature R8B of the second side surface of the eighth lens and the radius of curvature R9F of the first side surface of the ninth lens satisfy the following condition: 0.52≤R8B / R9F≤25.

[0022] Furthermore, the radius of curvature R6F of the first side of the sixth lens and the total focal length F of the optical lens satisfy the following condition: R6F / F≤-7.

[0023] Furthermore, the air gap d23 between the centers of the second and third lenses satisfies the following condition with respect to the total length TTL of the optical lens: d23 / TTL≤0.1.

[0024] Furthermore, the optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the following condition: BFL / TTL ≥ 0.01.

[0025] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H≥40.

[0026] Furthermore, the radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the total focal length F of the optical lens satisfy the following relationship: |F / R2F|+|F / R2B|≤1.5.

[0027] Furthermore, the focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following condition: -5≤F2 / R2B≤-0.2.

[0028] Furthermore, the entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy the following condition: F / ENPD≤2.5.

[0029] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.4 ≤ |F3 / F4| ≤ 2.

[0030] Furthermore, the cemented joint of the third lens and the fourth lens forms a first cemented surface, and the central radius of curvature Rj1 of the first cemented surface and the effective aperture Φj1 of the first cemented surface satisfy the following condition: 0.5≤|Rj1| / (Φj1 / 2)≤5.

[0031] Furthermore, the combined focal length F78 of the seventh and eighth lenses satisfies the following relationship with the total focal length F of the optical lens: |F78 / F| ≥ 3.

[0032] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: |F6| / |F7|≥1.01.

[0033] Furthermore, a second cemented surface is formed at the cementation point of the seventh and eighth lenses. The central radius of curvature Rj2 of the second cemented surface and the effective aperture Φj2 of the second cemented surface satisfy the following condition: |Rj2| / (Φj2 / 2)≥0.5.

[0034] Furthermore, the radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following condition: R8F / (R9F+d8)≤-0.02.

[0035] Furthermore, the total optical length TTL of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / (H / 2)≥5.

[0036] Furthermore, the radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the following condition: R9F / (R9F-R9B)≤1.5.

[0037] Furthermore, the light-transmitting aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5≤D18 / H≤2.

[0038] According to another aspect of the present invention, an optical lens is provided, comprising: a first lens having negative optical power; a second lens having negative optical power; a third lens having negative optical power; a fourth lens having positive optical power; a fifth lens having optical power; a sixth lens having optical power; a seventh lens having positive optical power; an eighth lens having negative optical power; and a ninth lens having positive optical power; wherein the radius of curvature R8B of the second side surface of the eighth lens and the radius of curvature R9F of the first side surface of the ninth lens satisfy the condition: 0.52≤R8B / R9F≤25.

[0039] Furthermore, the first side surface of the first lens is convex, and the second side surface of the first lens is concave.

[0040] Furthermore, the first side surface of the second lens is convex, and the second side surface of the second lens is concave.

[0041] Furthermore, the first side surface of the second lens is concave, and the second side surface of the second lens is also concave.

[0042] Furthermore, the first side surface of the third lens is concave, and the second side surface of the third lens is also concave.

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

[0044] Furthermore, the fifth lens has positive optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

[0045] Furthermore, the fifth lens has negative optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

[0046] Furthermore, the sixth lens has positive optical power, the first side of the sixth lens is concave, and the second side of the sixth lens is convex.

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

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

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

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

[0051] Furthermore, at least two of the lenses from the first to the ninth lens are aspherical lenses.

[0052] Furthermore, the fifth, sixth, and ninth lenses are aspherical lenses.

[0053] Furthermore, the third and fourth lenses are cemented together to form a cemented lens, and the seventh and eighth lenses are cemented together to form a cemented lens.

[0054] Furthermore, the optical lens also includes an aperture stop, which is located between the fifth and sixth lenses.

[0055] Furthermore, the first side surface of the sixth lens has a recurved point.

[0056] Furthermore, the second side surface of the fifth lens has a recurve point, and the first side surface of the sixth lens has a recurve point.

[0057] Furthermore, the maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV≤0.1.

[0058] Furthermore, the maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.5.

[0059] Furthermore, the maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following relationship: |(H / 2) / (F*tan(θ / 2))|≤1.

[0060] Furthermore, the radius of curvature R6F of the first side of the sixth lens and the total focal length F of the optical lens satisfy the following condition: R6F / F≤-7.

[0061] Furthermore, the air gap d23 between the centers of the second and third lenses satisfies the following condition with respect to the total length TTL of the optical lens: d23 / TTL≤0.1.

[0062] Furthermore, the optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the following condition: BFL / TTL ≥ 0.01.

[0063] Furthermore, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H≥40.

[0064] Furthermore, the radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the total focal length F of the optical lens satisfy the following relationship: |F / R2F|+|F / R2B|≤1.5.

[0065] Furthermore, the focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following condition: -5≤F2 / R2B≤-0.2.

[0066] Furthermore, the entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy the following condition: F / ENPD≤2.5.

[0067] Furthermore, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.4 ≤ |F3 / F4| ≤ 2.

[0068] Furthermore, the cemented joint of the third lens and the fourth lens forms a first cemented surface, and the central radius of curvature Rj1 of the first cemented surface and the effective aperture Φj1 of the first cemented surface satisfy the following condition: 0.5≤|Rj1| / (Φj1 / 2)≤5.

[0069] Furthermore, the combined focal length F78 of the seventh and eighth lenses satisfies the following relationship with the total focal length F of the optical lens: |F78 / F| ≥ 3.

[0070] Furthermore, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: |F6| / |F7|≥1.01.

[0071] Furthermore, a second cemented surface is formed at the cementation point of the seventh and eighth lenses. The central radius of curvature Rj2 of the second cemented surface and the effective aperture Φj2 of the second cemented surface satisfy the following condition: |Rj2| / (Φj2 / 2)≥0.5.

[0072] Furthermore, the radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following condition: R8F / (R9F+d8)≤-0.02.

[0073] Furthermore, the total optical length TTL of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / (H / 2)≥5.

[0074] Furthermore, the radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the following condition: R9F / (R9F-R9B)≤1.5.

[0075] Furthermore, the light-transmitting aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5≤D18 / H≤2.

[0076] 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.

[0077] According to the technical solution of this invention, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has negative optical power, a first side surface of the first lens is convex, and a second side surface of the first lens is concave. The second lens has negative optical power, and a second side surface of the second lens is concave. The third lens has negative optical power, and a first side surface of the third lens is concave, and a second side surface of the third lens is concave. The fourth lens has positive optical power, and a first side surface of the fourth lens is convex, and a second side surface of the fourth lens is convex. The fifth lens has optical power, and a first side surface of the fifth lens is convex, and a second side surface of the fifth lens is concave. The sixth lens has optical power, and a first side surface of the sixth lens is concave. The seventh lens has positive optical power, and a first side surface of the seventh lens is convex, and a second side surface of the seventh lens is convex. The eighth lens has negative optical power, and a first side surface of the eighth lens is concave, and a second side surface of the eighth lens is concave. The ninth lens has positive optical power, and a first side surface of the ninth lens is convex, and a second side surface of the ninth lens is convex.

[0078] By setting the first lens to have negative optical power, it can diverge the light rays passing through it. Under the same field of view, the light rays exiting the first lens provide a larger light-receiving surface for the subsequent optical system. Simultaneously, setting the first side of the first lens to be convex facilitates the collection of light rays from a large field of view into the subsequent optical system, giving the lens a large field of view. Furthermore, in rainy or snowy weather, it facilitates the sliding of water droplets, reducing their impact on imaging and increasing the stability of the optical lens. Setting the second side of the first lens to be concave allows it to rapidly diverge the light rays passing through the first side, which is beneficial for the subsequent optical system to correct aberrations at large angles, achieving high resolution.

[0079] Preferably, the first lens is made of a high refractive index material, which improves the imaging quality and also helps to reduce the front diameter of the optical lens, thus facilitating the miniaturization of the optical lens.

[0080] By setting the second lens to have negative optical power, the light rays from the first lens are further diverged, which helps the optical lens achieve a large image size. The combination of the first and second lenses, while achieving a large image size, also facilitates the gradual outward deflection of light, ensuring the imaging quality of the optical lens. Setting the second side of the second lens to be concave allows for the divergence of light rays passing through the first side of the second lens.

[0081] Optionally, the first side surface of the second lens is convex. In this case, the second lens has a meniscus structure convex towards the first side, which is beneficial for collecting light rays emitted through the first lens. The first lens also has a meniscus structure convex towards the first side. The combination of two negative meniscus lenses in the same direction makes the emitted light rays relatively smooth, which is beneficial for achieving small distortion. Because the first side surface of the first lens is convex, the angle of incidence of large field-of-view light rays when incident on the first side surface of the second lens is small. Setting the first side surface of the second lens to be convex facilitates the smooth arrival of light rays in the rear optical system, which is beneficial for achieving a large field of view.

[0082] Optionally, the first side of the second lens is concave. In this case, the second lens is a biconcave lens. The biconcave lens makes the outgoing light rays smooth, which is beneficial for correcting aberrations in the optical system and improving optical performance.

[0083] By setting the third lens as a negative lens, and making both the first and second sides of the third lens concave, the third lens becomes a biconcave lens. This is beneficial for receiving light emitted from the second lens, while also making the light emission smoother, which helps to improve the aberrations of the optical lens.

[0084] When the third and fourth lenses are cemented together, the light passing through the second lens can be smoothly transitioned to the imaging plane, reducing the overall optical length. Various aberrations of the optical lens are fully corrected, improving resolution, optimizing distortion, CRA and other optical performance while maintaining a compact structure.

[0085] By setting the fourth lens as a positive lens, the light rays emitted from the third lens are converged, which helps to further reduce aberrations and improve the imaging quality of the optical lens. Setting the second side surface of the fourth lens as a convex surface causes the peripheral light rays to bend towards the center after passing through the second side surface of the fourth lens, which helps to reduce the rear aperture of the optical lens and facilitates the miniaturization of the optical lens.

[0086] By making the first side of the fifth lens convex and the second side concave, the fifth lens is designed as a meniscus structure convex towards the first side, which facilitates the collection of light rays emitted from the fourth lens. The fifth lens can be either a positive or negative lens. When the fifth lens is a positive lens, it helps to converge light rays, ensuring a smooth transition of light rays into the rear optical system and reducing the height of light rays incident on the rear optical system. This, in turn, reduces the aperture of the rear lens, contributing to the miniaturization of the optical lens. When the fifth lens is a negative lens, it diverges light rays, providing a larger light-receiving surface for the rear optical system. Properly allocating optical power helps reduce aberrations and improve optical performance.

[0087] By making the first side of the sixth lens concave, it is beneficial to receive the light emitted from the fifth lens. The sixth lens is preferably made of a material with thermal compensation properties, giving the optical lens better thermal stability. The sixth lens can be either a positive or negative lens. When the sixth lens is a positive lens, its second side is convex, making it a meniscus lens convex towards the second side. This helps to compress the angle of the incident light, reducing the aperture of the rear lens and thus facilitating the miniaturization of the optical lens. When the sixth lens is a negative lens, its second side is concave. By controlling the optical power of the sixth lens, aberrations can be effectively corrected, image quality improved, distortion optimized, and CRA (Chief Ray Angle) and other optical performance parameters optimized.

[0088] By setting the seventh lens as a positive lens, and with both the first and second sides of the seventh lens being convex, it can converge light. By controlling the optical power of the seventh lens, it is beneficial to correct optical lens aberrations, improve image quality, optimize distortion, CRA and other optical performance.

[0089] When the seventh and eighth lenses are cemented together to form a cemented lens, it is easier to smoothly transition the light rays passing through the sixth lens to the imaging plane, reduce the total optical length, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it improves resolution, optimizes distortion, CRA and other optical performance.

[0090] By setting the eighth lens as a negative lens, and making both the first and second sides of the eighth lens concave, the light is diverged. The optical power of the eighth lens is reasonably allocated, which helps to further reduce aberrations and improve the imaging quality of the optical lens.

[0091] By setting the ninth lens as a positive lens, it is beneficial for light to converge. Making the ninth lens a biconvex lens is beneficial for receiving diverging light, allowing light to enter smoothly into the rear, which is beneficial for correcting system aberrations. At the same time, the ninth lens can reduce the height of light entering the rear optical system, reduce the rear aperture, and facilitate the miniaturization of optical lenses. Attached Figure Description

[0092] 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:

[0093] Figure 1 A cross-sectional view of an optical lens according to Example 1 of the present invention is shown;

[0094] Figure 2 A cross-sectional view of the optical lens of Example 2 of the present invention is shown;

[0095] Figure 3 A cross-sectional view of the optical lens of Example 3 of the present invention is shown;

[0096] Figure 4 A cross-sectional view of the optical lens of Example 4 of the present invention is shown;

[0097] Figure 5 A cross-sectional view of the optical lens of Example 5 of the present invention is shown;

[0098] Figure 6 A cross-sectional view of the optical lens of Example Six of the present invention is shown;

[0099] Figure 7 A cross-sectional view of the optical lens of Example Seven of the present invention is shown;

[0100] Figure 8 A cross-sectional view of the optical lens of Example 8 of the present invention is shown.

[0101] The above figures include the following reference numerals:

[0102] STO, aperture stop; 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; S5, first side surface of the third lens; S6, second side surface of the third lens (first side surface of the fourth lens); L4, fourth lens; S7, second side surface of the fourth lens; L5, fifth lens; S8, first side surface of the fifth lens; S9, second side surface of the fifth lens; L6, sixth lens; S11, sixth... S12, the first side surface of the lens; S13, the second side surface of the sixth lens; L7, the seventh lens; S14, the first side surface of the seventh lens; S15, the second side surface of the seventh lens (the first side surface of the eighth lens); L8, the eighth lens; S16, the second side surface of the eighth lens; L9, the ninth lens; S17, the first side surface of the ninth lens; S18, the first side surface of the filter; S19, the second side surface of the filter; S20, the first side surface of the protective glass; S21, the second side surface of the protective glass; IMA, the imaging plane. Detailed Implementation

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the first side surface of the lens, and the surface of each lens closest to the image side is called the second side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the first side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the second side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0109] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side. That is, the first side is the object side and the second side is the image side.

[0110] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. Light rays from the object side can form an image from the image side.

[0111] When the optical lens of this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided in this application can be used as, for example, a projection lens or a lidar transmitting lens. In this case, the image side of the optical lens can be the image source side, and the object side can be the imaging side. Light from the image source side can be imaged on the imaging side. The imaging surface of the optical lens is the image source surface.

[0112] In order to solve at least one of the problems of existing optical lenses, such as resolution aberration, small field of view, poor temperature performance, large size, and difficulty in achieving day and night confocal focus, the present invention provides an optical lens and an electronic device having the same.

[0113] Example 1

[0114] like Figures 1 to 8As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has negative optical power, a first side surface that is convex, and a second side surface that is concave. The second lens has negative optical power, and a second side surface that is concave. The third lens has negative optical power, and a first side surface that is concave, and a second side surface that is concave. The fourth lens has positive optical power, and a first side surface that is convex, and a second side surface that is convex. The fifth lens has optical power, and a first side surface that is convex, and a second side surface that is concave. The sixth lens has optical power, and a first side surface that is concave. The seventh lens has positive optical power, and a first side surface that is convex, and a second side surface that is convex. The eighth lens has negative optical power, and a first side surface that is concave, and a second side surface that is concave. The ninth lens has positive optical power, and a first side surface that is convex, and a second side surface that is convex.

[0115] By setting the first lens to have negative optical power, it can diverge the light rays passing through it. Under the same field of view, the light rays exiting the first lens provide a larger light-receiving surface for the subsequent optical system. Simultaneously, setting the first side of the first lens to be convex facilitates the collection of light rays from a large field of view into the subsequent optical system, giving the lens a large field of view. Furthermore, in rainy or snowy weather, it facilitates the sliding of water droplets, reducing their impact on imaging and increasing the stability of the optical lens. Setting the second side of the first lens to be concave allows it to rapidly diverge the light rays passing through the first side, which is beneficial for the subsequent optical system to correct aberrations at large angles, achieving high resolution.

[0116] Preferably, the first lens is made of a high refractive index material, which improves the imaging quality and also helps to reduce the front diameter of the optical lens, thus facilitating the miniaturization of the optical lens.

[0117] By setting the second lens to have negative optical power, the light rays from the first lens are further diverged, which helps the optical lens achieve a large image size. The combination of the first and second lenses, while achieving a large image size, also facilitates the gradual outward deflection of light, ensuring the imaging quality of the optical lens. Setting the second side of the second lens to be concave allows for the divergence of light rays passing through the first side of the second lens.

[0118] Optionally, the first side surface of the second lens is convex. In this case, the second lens has a meniscus structure convex towards the first side, which is beneficial for collecting light rays emitted through the first lens. The first lens also has a meniscus structure convex towards the first side. The combination of two negative meniscus lenses in the same direction makes the emitted light rays relatively smooth, which is beneficial for achieving small distortion. Because the first side surface of the first lens is convex, the angle of incidence of large field-of-view light rays when incident on the first side surface of the second lens is small. Setting the first side surface of the second lens to be convex facilitates the smooth arrival of light rays in the rear optical system, which is beneficial for achieving a large field of view.

[0119] Optionally, the first side of the second lens is concave. In this case, the second lens is a biconcave lens. The biconcave lens makes the outgoing light rays smooth, which is beneficial for correcting aberrations in the optical system and improving optical performance.

[0120] By setting the third lens as a negative lens, and making both the first and second sides of the third lens concave, the third lens becomes a biconcave lens. This is beneficial for receiving light emitted from the second lens, while also making the light emission smoother, which helps to improve the aberrations of the optical lens.

[0121] When the third and fourth lenses are cemented together, the light passing through the second lens can be smoothly transitioned to the imaging plane, reducing the overall optical length. Various aberrations of the optical lens are fully corrected, improving resolution, optimizing distortion, CRA and other optical performance while maintaining a compact structure.

[0122] By setting the fourth lens as a positive lens, the light rays emitted from the third lens are converged, which helps to further reduce aberrations and improve the imaging quality of the optical lens. Setting the second side surface of the fourth lens as a convex surface causes the peripheral light rays to bend towards the center after passing through the second side surface of the fourth lens, which helps to reduce the rear aperture of the optical lens and facilitates the miniaturization of the optical lens.

[0123] By making the first side of the fifth lens convex and the second side concave, the fifth lens is designed as a meniscus structure convex towards the first side, which facilitates the collection of light rays emitted from the fourth lens. The fifth lens can be either a positive or negative lens. When the fifth lens is a positive lens, it helps to converge light rays, ensuring a smooth transition of light rays into the rear optical system and reducing the height of light rays incident on the rear optical system. This, in turn, reduces the aperture of the rear lens, contributing to the miniaturization of the optical lens. When the fifth lens is a negative lens, it diverges light rays, providing a larger light-receiving surface for the rear optical system. Properly allocating optical power helps reduce aberrations and improve optical performance.

[0124] By making the first side of the sixth lens concave, it is beneficial to receive the light emitted from the fifth lens. The sixth lens is preferably made of a material with thermal compensation properties, giving the optical lens better thermal stability. The sixth lens can be either a positive or negative lens. When the sixth lens is a positive lens, its second side is convex, making it a meniscus lens convex towards the second side. This helps compress the angle of the incident light, reducing the aperture of the rear lens and thus facilitating miniaturization of the optical lens. When the sixth lens is a negative lens, its second side is concave. By controlling the optical power of the sixth lens, aberrations can be effectively corrected, image quality improved, distortion optimized, and CRA (Chief Ray Angle) and other optical performance improved. By making the seventh lens a positive lens, with both its first and second sides convex, it converges light. By controlling the optical power of the seventh lens, aberrations can be corrected, image quality improved, distortion optimized, and CRA (Chief Ray Angle) and other optical performance improved.

[0125] When the seventh and eighth lenses are cemented together to form a cemented lens, it is easier to smoothly transition the light rays passing through the sixth lens to the imaging plane, reduce the total optical length, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it improves resolution, optimizes distortion, CRA and other optical performance.

[0126] By setting the eighth lens as a negative lens, and making both the first and second sides of the eighth lens concave, the light is diverged. The optical power of the eighth lens is reasonably allocated, which helps to further reduce aberrations and improve the imaging quality of the optical lens.

[0127] By setting the ninth lens as a positive lens, it is beneficial for light to converge. Making the ninth lens a biconvex lens is beneficial for receiving diverging light, allowing light to enter smoothly into the rear, which is beneficial for correcting system aberrations. At the same time, the ninth lens can reduce the height of light entering the rear optical system, reduce the rear aperture, and facilitate the miniaturization of optical lenses.

[0128] In this embodiment, at least two of the first to ninth lenses are aspherical lenses. Aspherical lenses are beneficial for correcting system aberrations, improving resolution, and achieving confocal performance in both infrared and visible light.

[0129] Preferably, the fifth, sixth, and ninth lenses are aspherical lenses.

[0130] In this embodiment, the third and fourth lenses are cemented together to form a cemented lens, and the seventh and eighth lenses are cemented together to form a cemented lens. The use of cemented lenses effectively eliminates the influence of ghosting on the optical lens, ensuring high resolution while eliminating ghosting. Various aberrations in the optical lens are fully corrected, improving resolution, optimizing distortion, and enhancing CRA (Corrective Aberration Reduction) optical performance while maintaining a compact structure. The negative lens in the cemented lens has a higher refractive index than the positive lens, allowing for a smooth transition of light at the final stage, ensuring a stable arrival of light at the imaging plane, and reducing overall weight and cost. Simultaneously, cemented lenses reduce light loss caused by inter-lens reflections. The combination of high- and low-refractive-index materials facilitates rapid transition of light from the front, increases the aperture, and improves light transmission, which is beneficial for night vision requirements. Cemented lenses also reduce the air gap between two lenses, making the overall structure of the optical lens more compact and reducing tolerance-sensitive issues such as overall eccentricity during lens assembly. Using cemented lenses in optical lenses reduces processes, lowers costs, reduces field curvature, corrects off-axis point aberrations, and ensures the imaging quality of the optical lens.

[0131] In this embodiment, the optical lens also includes an aperture stop, which is located between the fifth lens and the sixth lens. The aperture stop is beneficial for converging the light entering the optical lens, reducing the lens aperture at the front end of the optical lens, and reducing the assembly sensitivity of the optical lens.

[0132] Optionally, the first side of the sixth lens has a recurve point. Setting a recurve point on the lens surface helps to correct field curvature and aberrations, reduce the principal ray angle, and thus improve the image acquisition sensitivity, achieving higher energy collection.

[0133] Optionally, the second side surface of the fifth lens has a recurve point, and the first side surface of the sixth lens has a recurve point.

[0134] In this embodiment, the maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.1. Limiting TTL / H / FOV within a reasonable range effectively restricts the total optical length of the optical lens while maintaining the same image height and field of view, which is beneficial for miniaturizing the optical lens. Preferably, TTL / H / FOV ≤ 0.05.

[0135] In this embodiment, the maximum field of view radian value θ of the optical lens, the total focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.5. By limiting |(HF*θ) / (F*θ)| to a reasonable range, the optical lens can have a smaller focal length while keeping the field of view and image height constant, thereby reducing the distortion of the optical lens. Preferably, |(HF*θ) / (F*θ)|≤0.3.

[0136] In this embodiment, the maximum field of view angle in radians θ, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view satisfy the following relationship: |(H / 2) / (F*tan(θ / 2))|≤1. |(H / 2) / (F*tan(θ / 2))| reflects the ratio of the actual image height to the ideal image height. The smaller this ratio, the better it is to increase the angular resolution of the central region of the image plane while maintaining the same field of view angle and image plane size. Preferably, |(H / 2) / (F*tan(θ / 2))|≤0.5.

[0137] In this embodiment, the radius of curvature R8B of the second side surface of the eighth lens and the radius of curvature R9F of the first side surface of the ninth lens satisfy the following condition: 0.52 ≤ R8B / R9F ≤ 25. Controlling R8B / R9F within a reasonable range facilitates the smooth entry of light into the ninth lens, reducing aberrations introduced by the ninth lens and improving the resolving power of the optical lens. Preferably, 1 ≤ R8B / R9F ≤ 20.

[0138] In this embodiment, the radius of curvature R6F of the first side surface of the sixth lens and the overall focal length F of the optical lens satisfy the condition: R6F / F ≤ -7. By limiting R6F / F within a reasonable range, the first side surface of the sixth lens is concave, and the absolute value of the radius of curvature is relatively large, resulting in a smoother light emission path. This facilitates a smoother transition of light to the rear optical system, helps balance various aberrations, and improves resolving power. Preferably, R6F / F ≤ -9.

[0139] In this embodiment, the air gap d23 between the centers of the second and third lenses satisfies the condition d23 / TTL ≤ 0.1 with respect to the total optical length TTL of the optical lens. Keeping d23 / TTL within a reasonable range ensures that the distance between the second and third lenses represents a smaller proportion of the total optical length of the lens, thus improving the assembly yield of the optical lens. Preferably, d23 / TTL ≤ 0.09.

[0140] In this embodiment, the optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the condition: BFL / TTL ≥ 0.01. With the same total optical length, having a longer optical back focal length allows for more space for optical component installation and focusing, avoids interference from other structures, and facilitates optical lens assembly. Preferably, BFL / TTL ≥ 0.03.

[0141] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H ≥ 40. Limiting (FOV×F) / H within a reasonable range allows the optical lens to achieve a longer focal length while simultaneously increasing its field of view, resulting in a larger field of view. Preferably, (FOV×F) / H ≥ 45.

[0142] In this embodiment, the radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the overall focal length F of the optical lens satisfy the following relationship: |F / R2F|+|F / R2B|≤1.5. By limiting |F / R2F|+|F / R2B| to a reasonable range, the surface of the second lens has a larger curvature, which facilitates the smooth passage of light through the second lens and helps the incident light to enter the rear optical system. This also helps to converge edge light into the rear optical system, effectively correcting astigmatism and improving the imaging quality of the optical lens. Preferably, |F / R2F|+|F / R2B|≤1.

[0143] In this embodiment, the focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following relationship: -5 ≤ F2 / R2B ≤ -0.2. The negative focal length and concave second side surface of the second lens prevent excessive divergence of light from the first side of the second lens. Maintaining F2 / R2B within a reasonable range helps collect light entering through the first lens and makes the outgoing light smoother, reducing distortion. It also controls the aperture of the rear lens, facilitating miniaturization of the optical lens. Preferably, -2 ≤ F2 / R2B ≤ -0.5.

[0144] In this embodiment, the entrance pupil diameter (ENPD) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: F / ENPD ≤ 2.5. Limiting F / ENPD within a reasonable range facilitates a small FNO for the optical lens, increases the light transmission of the optical lens, improves relative illumination, and promotes clear imaging in low-light environments. Preferably, F / ENPD ≤ 2.3.

[0145] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.4 ≤ |F3 / F4| ≤ 2. By limiting |F3 / F4| to a reasonable range, the focal lengths of the third and fourth lenses are made relatively similar, which facilitates a smooth transition of light between the three lenses and improves the image quality of the optical lens. Preferably, 0.55 ≤ |F3 / F4| ≤ 1.5.

[0146] In this embodiment, the cemented joint of the third lens and the fourth lens forms a first cemented surface. The central radius of curvature Rj1 of the first cemented surface and the effective aperture Φj1 of the first cemented surface satisfy the following condition: 0.5 ≤ |Rj1| / (Φj1 / 2) ≤ 5. By controlling |Rj1| / (Φj1 / 2) within a reasonable range, the angular size of the first cemented surface is effectively controlled. A small angular size is not conducive to aberration correction, while a large angular size is not conducive to large field-of-view imaging. This setting effectively reduces the generation of higher-order aberrations, thereby improving the light transmission and resolving capabilities of the entire optical lens and effectively reducing the process requirements at the first cemented surface. Preferably, 0.8 ≤ |Rj1| / (Φj1 / 2) ≤ 4.

[0147] In this embodiment, the combined focal length F78 of the seventh and eighth lenses satisfies the following relationship with the overall focal length F of the optical lens: |F78 / F| ≥ 3. By controlling |F78 / F| within a reasonable range, it is beneficial to achieve a larger combined focal length F78 of the seventh and eighth lenses, which is conducive to correcting chromatic aberration, improving image quality, and thus facilitating day and night confocal focusing, ensuring imaging quality in low-light environments. Preferably, |F78 / F| ≥ 5.

[0148] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the condition: |F6| / |F7|≥1.01. By selecting materials with suitable refractive indices, the absolute value of the focal length F6 of the sixth lens is greater than the absolute value of the focal length F7 of the seventh lens. The larger absolute value of the focal length F6 of the sixth lens has a relatively smaller impact on temperature performance, thus effectively controlling the back focus shift of the optical lens under high and low temperatures, which is beneficial for clear imaging under different temperature environments. Preferably, |F6| / |F7|≥1.2.

[0149] In this embodiment, a second cemented surface is formed at the cementation point of the seventh and eighth lenses. The central radius of curvature Rj2 of the second cemented surface and the effective aperture Φj2 of the second cemented surface satisfy the condition: |Rj2| / (Φj2 / 2)≥0.5. By controlling |Rj2| / (Φj2 / 2) within a reasonable range, the second cemented surface has a larger angle, effectively controlling the generation of higher-order aberrations, which is beneficial to improving the light transmission and resolving capabilities of the entire optical lens, and effectively reducing the manufacturing requirements of the second cemented surface. Preferably, |Rj2| / (Φj2 / 2)≥0.8.

[0150] In this embodiment, the radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following relationship: R8F / (R9F+d8)≤-0.02. Limiting R8F / (R9F+d8) within a reasonable range helps reduce the curvature of the first side surface of the ninth lens, increases the refractive power of the ninth lens, and creates an optical path difference between the edge rays and the center rays, which facilitates the divergence of the center rays emitted from the eighth lens into the rear optical system. Preferably, R8F / (R9F+d8)≤-0.1.

[0151] In this embodiment, the total optical length (TTL) of the optical lens and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / (H / 2) ≥ 5. By limiting TTL / (H / 2) within a reasonable range, the optical lens has a larger total optical length while maintaining a constant image height. This reduces the optical power allocated to each lens, which is beneficial for correcting aberrations and thus improving resolving power. Preferably, TTL / (H / 2) ≥ 7.

[0152] In this embodiment, the radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the condition: R9F / (R9F-R9B)≤1.5. By limiting R9F / (R9F-R9B) within a reasonable range, when the radius of curvature of the first side surface of the ninth lens remains unchanged and both the first and second side surfaces of the ninth lens are convex, increasing the radius of curvature of the second side surface of the ninth lens makes the light emitted from the second side surface of the ninth lens smoother, which helps to correct the aberrations of the optical lens and improve image quality. Preferably, R9F / (R9F-R9B)≤0.9.

[0153] In this embodiment, the aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ D18 / H ≤ 2. By limiting D18 / H within a reasonable range, the aperture and image height of the ninth lens are made closer, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, 0.75 ≤ D18 / H ≤ 1.5.

[0154] Example 2

[0155] like Figures 1 to 8 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens. The first lens has negative optical power; the second lens has negative optical power; the third lens has negative optical power; the fourth lens has positive optical power; the fifth lens has optical power; the sixth lens has optical power; the seventh lens has positive optical power; the eighth lens has negative optical power; and the ninth lens has positive optical power. The radius of curvature R8B of the second side of the eighth lens and the radius of curvature R9F of the first side of the ninth lens satisfy the following relationship: 0.52 ≤ R8B / R9F ≤ 25.

[0156] By setting the first lens to have negative optical power, it can diverge the light rays passing through it. Under the same field of view, the light rays exiting the first lens provide a larger light-receiving surface for the subsequent optical system. Simultaneously, setting the first side of the first lens to be convex facilitates the collection of light rays from a large field of view into the subsequent optical system, giving the lens a large field of view. Furthermore, in rainy or snowy weather, it facilitates the sliding of water droplets, reducing their impact on imaging and increasing the stability of the optical lens. Setting the second side of the first lens to be concave allows it to rapidly diverge the light rays passing through the first side, which is beneficial for the subsequent optical system to correct aberrations at large angles, achieving high resolution.

[0157] By controlling R8B / R9F within a reasonable range, light can enter the ninth lens smoothly, reducing aberrations caused by the ninth lens and improving the resolving power of the optical lens. Preferably, 1 ≤ R8B / R9F ≤ 20.

[0158] Preferably, the first lens is made of a high refractive index material, which improves the imaging quality and also helps to reduce the front diameter of the optical lens, thus facilitating the miniaturization of the optical lens.

[0159] By setting the second lens to have negative optical power, the light rays from the first lens are further diverged, which helps the optical lens achieve a large image size. The combination of the first and second lenses, while achieving a large image size, also facilitates the gradual outward deflection of light, ensuring the imaging quality of the optical lens. Setting the second side of the second lens to be concave allows for the divergence of light rays passing through the first side of the second lens.

[0160] Optionally, the first side surface of the second lens is convex. In this case, the second lens has a meniscus structure convex towards the first side, which is beneficial for collecting light rays emitted through the first lens. The first lens also has a meniscus structure convex towards the first side. The combination of two negative meniscus lenses in the same direction makes the emitted light rays relatively smooth, which is beneficial for achieving small distortion. Because the first side surface of the first lens is convex, the angle of incidence of large field-of-view light rays when incident on the first side surface of the second lens is small. Setting the first side surface of the second lens to be convex facilitates the smooth arrival of light rays in the rear optical system, which is beneficial for achieving a large field of view.

[0161] Optionally, the first side of the second lens is concave. In this case, the second lens is a biconcave lens. The biconcave lens makes the outgoing light rays smooth, which is beneficial for correcting aberrations in the optical system and improving optical performance.

[0162] By setting the third lens as a negative lens, and making both the first and second sides of the third lens concave, the third lens becomes a biconcave lens. This is beneficial for receiving light emitted from the second lens, while also making the light emission smoother, which helps to improve the aberrations of the optical lens.

[0163] When the third and fourth lenses are cemented together, the light passing through the second lens can be smoothly transitioned to the imaging plane, reducing the overall optical length. Various aberrations of the optical lens are fully corrected, improving resolution, optimizing distortion, CRA and other optical performance while maintaining a compact structure.

[0164] By setting the fourth lens as a positive lens, the light rays emitted from the third lens are converged, which helps to further reduce aberrations and improve the imaging quality of the optical lens. Setting the second side surface of the fourth lens as a convex surface causes the peripheral light rays to bend towards the center after passing through the second side surface of the fourth lens, which helps to reduce the rear aperture of the optical lens and facilitates the miniaturization of the optical lens.

[0165] By making the first side of the fifth lens convex and the second side concave, the fifth lens is designed as a meniscus structure convex towards the first side, which facilitates the collection of light rays emitted from the fourth lens. The fifth lens can be either a positive or negative lens. When the fifth lens is a positive lens, it helps to converge light rays, ensuring a smooth transition of light rays into the rear optical system and reducing the height of light rays incident on the rear optical system. This, in turn, reduces the aperture of the rear lens, contributing to the miniaturization of the optical lens. When the fifth lens is a negative lens, it diverges light rays, providing a larger light-receiving surface for the rear optical system. Properly allocating optical power helps reduce aberrations and improve optical performance.

[0166] By making the first side of the sixth lens concave, it is beneficial to receive the light emitted from the fifth lens. The sixth lens is preferably made of a material with thermal compensation properties, giving the optical lens better thermal stability. The sixth lens can be either a positive or negative lens. When the sixth lens is a positive lens, its second side is convex, making it a meniscus lens convex towards the second side. This helps compress the angle of the incident light, reducing the aperture of the rear lens and thus facilitating miniaturization of the optical lens. When the sixth lens is a negative lens, its second side is concave. By controlling the optical power of the sixth lens, aberrations can be effectively corrected, image quality improved, distortion optimized, and CRA (Chief Ray Angle) and other optical performance improved. By making the seventh lens a positive lens, with both its first and second sides convex, it converges light. By controlling the optical power of the seventh lens, aberrations can be corrected, image quality improved, distortion optimized, and CRA (Chief Ray Angle) and other optical performance improved.

[0167] When the seventh and eighth lenses are cemented together to form a cemented lens, it is easier to smoothly transition the light rays passing through the sixth lens to the imaging plane, reduce the total optical length, and fully correct various aberrations of the optical lens. Under the premise of compact structure, it improves resolution, optimizes distortion, CRA and other optical performance.

[0168] By setting the eighth lens as a negative lens, and making both the first and second sides of the eighth lens concave, the light is diverged. The optical power of the eighth lens is reasonably allocated, which helps to further reduce aberrations and improve the imaging quality of the optical lens.

[0169] By setting the ninth lens as a positive lens, it is beneficial for light to converge. Making the ninth lens a biconvex lens is beneficial for receiving diverging light, allowing light to enter smoothly into the rear, which is beneficial for correcting system aberrations. At the same time, the ninth lens can reduce the height of light entering the rear optical system, reduce the rear aperture, and facilitate the miniaturization of optical lenses.

[0170] In this embodiment, at least two of the first to ninth lenses are aspherical lenses. Aspherical lenses are beneficial for correcting system aberrations, improving resolution, and achieving confocal performance in both infrared and visible light.

[0171] Preferably, the fifth, sixth, and ninth lenses are aspherical lenses.

[0172] In this embodiment, the third and fourth lenses are cemented together to form a cemented lens, and the seventh and eighth lenses are cemented together to form a cemented lens. The use of cemented lenses effectively eliminates the influence of ghosting on the optical lens, ensuring high resolution while eliminating ghosting. Various aberrations in the optical lens are fully corrected, improving resolution, optimizing distortion, and enhancing CRA (Corrective Aberration Reduction) optical performance while maintaining a compact structure. The negative lens in the cemented lens has a higher refractive index than the positive lens, allowing for a smooth transition of light at the final stage, ensuring a stable arrival of light at the imaging plane, and reducing overall weight and cost. Simultaneously, cemented lenses reduce light loss caused by inter-lens reflections. The combination of high- and low-refractive-index materials facilitates rapid transition of light from the front, increases the aperture, and improves light transmission, which is beneficial for night vision requirements. Cemented lenses also reduce the air gap between two lenses, making the overall structure of the optical lens more compact and reducing tolerance-sensitive issues such as overall eccentricity during lens assembly. Using cemented lenses in optical lenses reduces processes, lowers costs, reduces field curvature, corrects off-axis point aberrations, and ensures the imaging quality of the optical lens.

[0173] In this embodiment, the optical lens also includes an aperture stop, which is located between the fifth lens and the sixth lens. The aperture stop is beneficial for converging the light entering the optical lens, reducing the lens aperture at the front end of the optical lens, and reducing the assembly sensitivity of the optical lens.

[0174] Optionally, the first side of the sixth lens has a recurve point. Setting a recurve point on the lens surface helps to correct field curvature and aberrations, reduce the principal ray angle, and thus improve the image acquisition sensitivity, achieving higher energy collection.

[0175] Optionally, the second side surface of the fifth lens has a recurve point, and the first side surface of the sixth lens has a recurve point.

[0176] In this embodiment, the maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / H / FOV ≤ 0.1. Limiting TTL / H / FOV within a reasonable range effectively restricts the total optical length of the optical lens while maintaining the same image height and field of view, which is beneficial for miniaturizing the optical lens. Preferably, TTL / H / FOV ≤ 0.05.

[0177] In this embodiment, the maximum field of view radian value θ of the optical lens, the total focal length value F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following relationship: |(HF*θ) / (F*θ)|≤0.5. By limiting |(HF*θ) / (F*θ)| to a reasonable range, the optical lens can have a smaller focal length while keeping the field of view and image height constant, thereby reducing the distortion of the optical lens. Preferably, |(HF*θ) / (F*θ)|≤0.3.

[0178] In this embodiment, the maximum field of view angle in radians θ, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view satisfy the following relationship: |(H / 2) / (F*tan(θ / 2))|≤1. |(H / 2) / (F*tan(θ / 2))| reflects the ratio of the actual image height to the ideal image height. The smaller this ratio, the better it is to increase the angular resolution of the central region of the image plane while maintaining the same field of view angle and image plane size. Preferably, |(H / 2) / (F*tan(θ / 2))|≤0.5.

[0179] In this embodiment, the radius of curvature R6F of the first side surface of the sixth lens and the overall focal length F of the optical lens satisfy the condition: R6F / F ≤ -7. By limiting R6F / F within a reasonable range, the first side surface of the sixth lens is concave, and the absolute value of the radius of curvature is relatively large, resulting in a smoother light emission path. This facilitates a smoother transition of light to the rear optical system, helps balance various aberrations, and improves resolving power. Preferably, R6F / F ≤ -9.

[0180] In this embodiment, the air gap d23 between the centers of the second and third lenses satisfies the condition d23 / TTL ≤ 0.1 with respect to the total optical length TTL of the optical lens. Keeping d23 / TTL within a reasonable range ensures that the distance between the second and third lenses represents a smaller proportion of the total optical length of the lens, thus improving the assembly yield of the optical lens. Preferably, d23 / TTL ≤ 0.09.

[0181] In this embodiment, the optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the condition: BFL / TTL ≥ 0.01. With the same total optical length, having a longer optical back focal length allows for more space for optical component installation and focusing, avoids interference from other structures, and facilitates optical lens assembly. Preferably, BFL / TTL ≥ 0.03.

[0182] In this embodiment, the maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: (FOV×F) / H ≥ 40. Limiting (FOV×F) / H within a reasonable range allows the optical lens to achieve a longer focal length while simultaneously increasing its field of view, resulting in a larger field of view. Preferably, (FOV×F) / H ≥ 45.

[0183] In this embodiment, the radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the overall focal length F of the optical lens satisfy the following relationship: |F / R2F|+|F / R2B|≤1.5. By limiting |F / R2F|+|F / R2B| to a reasonable range, the surface of the second lens has a larger curvature, which facilitates the smooth passage of light through the second lens and helps the incident light to enter the rear optical system. This also helps to converge edge light into the rear optical system, effectively correcting astigmatism and improving the imaging quality of the optical lens. Preferably, |F / R2F|+|F / R2B|≤1.

[0184] In this embodiment, the focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following relationship: -5 ≤ F2 / R2B ≤ -0.2. The negative focal length and concave second side surface of the second lens prevent excessive divergence of light from the first side of the second lens. Maintaining F2 / R2B within a reasonable range helps collect light entering through the first lens and makes the outgoing light smoother, reducing distortion. It also controls the aperture of the rear lens, facilitating miniaturization of the optical lens. Preferably, -2 ≤ F2 / R2B ≤ -0.5.

[0185] In this embodiment, the entrance pupil diameter (ENPD) of the optical lens and the total focal length (F) of the optical lens satisfy the condition: F / ENPD ≤ 2.5. Limiting F / ENPD within a reasonable range facilitates a small FNO for the optical lens, increases the light transmission of the optical lens, improves relative illumination, and promotes clear imaging in low-light environments. Preferably, F / ENPD ≤ 2.3.

[0186] In this embodiment, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the condition: 0.4 ≤ |F3 / F4| ≤ 2. By limiting |F3 / F4| to a reasonable range, the focal lengths of the third and fourth lenses are made relatively similar, which facilitates a smooth transition of light between the three lenses and improves the image quality of the optical lens. Preferably, 0.55 ≤ |F3 / F4| ≤ 1.5.

[0187] In this embodiment, the cemented joint of the third lens and the fourth lens forms a first cemented surface. The central radius of curvature Rj1 of the first cemented surface and the effective aperture Φj1 of the first cemented surface satisfy the following condition: 0.5 ≤ |Rj1| / (Φj1 / 2) ≤ 5. By controlling |Rj1| / (Φj1 / 2) within a reasonable range, the angular size of the first cemented surface is effectively controlled. A small angular size is not conducive to aberration correction, while a large angular size is not conducive to large field-of-view imaging. This setting effectively reduces the generation of higher-order aberrations, thereby improving the light transmission and resolving capabilities of the entire optical lens and effectively reducing the process requirements at the first cemented surface. Preferably, 0.8 ≤ |Rj1| / (Φj1 / 2) ≤ 4.

[0188] In this embodiment, the combined focal length F78 of the seventh and eighth lenses satisfies the following relationship with the overall focal length F of the optical lens: |F78 / F| ≥ 3. By controlling |F78 / F| within a reasonable range, it is beneficial to achieve a larger combined focal length F78 of the seventh and eighth lenses, which is conducive to correcting chromatic aberration, improving image quality, and thus facilitating day and night confocal focusing, ensuring imaging quality in low-light environments. Preferably, |F78 / F| ≥ 5.

[0189] In this embodiment, the focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the condition: |F6| / |F7|≥1.01. By selecting materials with suitable refractive indices, the absolute value of the focal length F6 of the sixth lens is greater than the absolute value of the focal length F7 of the seventh lens. The larger absolute value of the focal length F6 of the sixth lens has a relatively smaller impact on temperature performance, thus effectively controlling the back focus shift of the optical lens under high and low temperatures, which is beneficial for clear imaging under different temperature environments. Preferably, |F6| / |F7|≥1.2.

[0190] In this embodiment, a second cemented surface is formed at the cementation point of the seventh and eighth lenses. The central radius of curvature Rj2 of the second cemented surface and the effective aperture Φj2 of the second cemented surface satisfy the condition: |Rj2| / (Φj2 / 2)≥0.5. By controlling |Rj2| / (Φj2 / 2) within a reasonable range, the second cemented surface has a larger angle, effectively controlling the generation of higher-order aberrations, which is beneficial to improving the light transmission and resolving capabilities of the entire optical lens, and effectively reducing the manufacturing requirements of the second cemented surface. Preferably, |Rj2| / (Φj2 / 2)≥0.8.

[0191] In this embodiment, the radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following relationship: R8F / (R9F+d8)≤-0.02. Limiting R8F / (R9F+d8) within a reasonable range helps reduce the curvature of the first side surface of the ninth lens, increases the refractive power of the ninth lens, and creates an optical path difference between the edge rays and the center rays, which facilitates the divergence of the center rays emitted from the eighth lens into the rear optical system. Preferably, R8F / (R9F+d8)≤-0.1.

[0192] In this embodiment, the total optical length (TTL) of the optical lens and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following relationship: TTL / (H / 2) ≥ 5. By limiting TTL / (H / 2) within a reasonable range, the optical lens has a larger total optical length while maintaining a constant image height. This reduces the optical power allocated to each lens, which is beneficial for correcting aberrations and thus improving resolving power. Preferably, TTL / (H / 2) ≥ 7.

[0193] In this embodiment, the radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the condition: R9F / (R9F-R9B)≤1.5. By limiting R9F / (R9F-R9B) within a reasonable range, when the radius of curvature of the first side surface of the ninth lens remains unchanged and both the first and second side surfaces of the ninth lens are convex, increasing the radius of curvature of the second side surface of the ninth lens makes the light emitted from the second side surface of the ninth lens smoother, which helps to correct the aberrations of the optical lens and improve image quality. Preferably, R9F / (R9F-R9B)≤0.9.

[0194] In this embodiment, the aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.5 ≤ D18 / H ≤ 2. By limiting D18 / H within a reasonable range, the aperture and image height of the ninth lens are made closer, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, 0.75 ≤ D18 / H ≤ 1.5.

[0195] It should be noted that the total length TTL of the optical lens is the distance from the first side of the first lens to the imaging plane of the optical lens.

[0196] Optionally, the aforementioned optical lens may also include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0197] The optical lens in this application can employ multiple lenses, such as the nine lenses mentioned above. In this application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. An aspherical lens is characterized by a continuously changing curvature from the lens center to the lens periphery. Unlike a spherical lens, which has a constant curvature from the lens center to the lens periphery, an aspherical lens has better curvature radius characteristics, offering advantages in improving distortion aberrations and astigmatism. By using aspherical lenses, aberrations occurring during imaging can be eliminated as much as possible, thereby improving image quality. Specifically, when the imaging quality of the optical lens is the primary concern, all nine lenses can be aspherical lenses.

[0198] In an exemplary embodiment, the first to ninth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift of the back focus of the optical lens due to temperature changes, thereby improving system stability. At the same time, using glass can avoid lens blurring caused by high and low temperature changes in the operating environment, which would affect the normal use of the lens. For example, an all-glass optical lens has a wider temperature range and can maintain stable optical performance within the range of -40°C to 105°C.

[0199] Specifically, when image resolution and reliability are paramount, the first through ninth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first through ninth lenses in an optical lens can also be made entirely of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first through ninth lenses in an optical lens can also be made from a combination of plastic and glass.

[0200] This application also provides an electronic device, including the aforementioned optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The electronic device may be a standalone imaging device such as a digital camera, or an imaging module integrated into a mobile electronic device such as a mobile phone. This electronic device is equipped with the optical lens described above.

[0201] 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.

[0202] 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.

[0203] Example 1

[0204] like Figure 1 As shown, the optical lens, from the first side to the second side, includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA.

[0205] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0206] In this example, the focal length F of the optical lens is 2.1046mm, the total length TTL of the optical lens is 34.8763mm, and the maximum field of view FOV of the optical lens is 195°.

[0207] In this example, the third and fourth lenses are cemented lenses, so the second side surface of the third lens and the first side surface of the fourth lens are both S6. The seventh and eighth lenses are cemented lenses, so the second side surface of the seventh lens and the first side surface of the eighth lens are both S14. However, for the first and second sides, even with the same radius of curvature, their surface shapes are different. Therefore, the second side surface S6 of the third lens is concave, and the first side surface S6 of the fourth lens is convex; the second side surface S14 of the seventh lens is convex, and the first side surface S14 of the eighth lens is concave.

[0208] It should be noted that the radius of curvature RiF of the first side surface of the i-th lens is the radius of curvature value corresponding to the surface number of the first side surface of the i-th lens in Table 1. For example, the radius of curvature R9F of the first side surface of the 9th lens is 3.526, which is the radius of curvature value corresponding to surface number 16 in Table 1.

[0209] Table 1 shows the basic structural parameters of the optical lens in Example 1, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, Infinity represents infinity, and IMA is the imaging plane.

[0210]

[0211]

[0212] Table 1

[0213] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. The surface shape of each aspherical lens can be defined using, but is not limited to, the following aspherical formulas:

[0214]

[0215] Where x is the distance vector from the vertex of the aspherical surface along the optical axis at a height of h; 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; and A is the higher-order coefficient. Table 2 below shows the conic coefficient k and the higher-order coefficients A (4th-order coefficient), B (6th-order coefficient), C (8th-order coefficient), D (10th-order coefficient), E (12th-order coefficient), F (14th-order coefficient), and G (16th-order coefficient) that can be used for the aspherical lens surface in this example.

[0216] Surf K A B C D E F G 8 -0.5928 1.0199E-03 3.0148E-05 -5.3270E-07 5.9153E-08 4.9974E-10 -1.47E-10 -2.82E-18 9 2.8448 3.2312E-03 2.9519E-04 2.7535E-05 1.1876E-06 3.3145E-16 -7.27E-21 -2.80E-23 11 -12.7590 1.2523E-03 1.9157E-04 -4.8016E-05 1.0663E-05 -1.1977E-06 2.19E-16 -6.60E-23 12 -0.6503 -1.6962E-03 -8.1135E-05 -3.3633E-05 4.0845E-06 -3.5056E-07 -2.12E-15 -1.05E-21 16 -4.1520 7.6720E-05 -6.3569E-05 3.5765E-06 -4.4075E-08 -5.6747E-10 -6.05E-12 1.89E-20 17 -0.0092 4.1094E-04 -3.4848E-06 8.7199E-07 -1.7117E-07 1.3513E-08 -3.29E-10 -4.75E-18

[0217] Table 2

[0218] Example 2

[0219] like Figure 2 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0220] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0221] In this example, the focal length F of the optical lens is 2.1145mm, the total length TTL of the optical lens is 34.8693mm, and the maximum field of view FOV of the optical lens is 195°.

[0222] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0223]

[0224]

[0225] Table 3

[0226] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 4 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0227] Table 4

[0228] Example 3

[0229] like Figure 3 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0230] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0231] In this example, the focal length F of the optical lens is 2.0222mm, the total length TTL of the optical lens is 35.0047mm, and the maximum field of view FOV of the optical lens is 195°.

[0232] In this example, the first side of the sixth lens has a point of inflection.

[0233] Surf K A B C D E F G 8 -0.5928 1.0199E-03 3.0148E-05 -5.3270E-07 5.9153E-08 4.9974E-10 -1.4721E-10 -2.8226E-18 9 2.8448 3.2312E-03 2.9519E-04 2.7535E-05 1.1876E-06 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -12.7590 1.2523E-03 1.9157E-04 -4.8016E-05 1.0663E-05 -1.1977E-06 2.1938E-16 -6.6033E-23 12 -0.6503 -1.6962E-03 -8.1135E-05 -3.3633E-05 4.0845E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -4.1520 7.6720E-05 -6.3569E-05 3.5765E-06 -4.4075E-08 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -0.0092 4.1094E-04 -3.4848E-06 8.7199E-07 -1.7117E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0234] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0235] Surf Radius Thickness Nd Vd 1 13.998 2.000 1.99 16.48 2 4.601 3.123 3 -99.000 0.900 1.95 17.94 4 5.698 2.013 5 -7.114 0.700 1.83 42.73 6 6.090 4.813 1.85 23.78 7 -8.205 0.100 8 4.600 3.260 1.69 31.08 9 4.277 1.053 STO Infinity 0.107 11 -190.883 2.685 1.50 81.61 12 -5.463 0.100 13 7.688 3.598 1.50 81.61 14 -3.143 2.200 1.81 22.70 15 18.450 0.100 16 5.504 4.847 1.50 81.61 17 -3.475 0.138 18 Infinity 0.550 1.52 64.20 19 Infinity 2.000 20 Infinity 0.500 1.52 64.20 21 Infinity 0.217 IMA / /

[0236] Table 5

[0237] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 6 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0238] Surf K A B C D E F G 8 -0.5962 1.7346E-03 -3.2846E-05 1.1144E-05 -7.2555E-07 4.9974E-10 -1.4721E-10 -2.8226E-18 9 1.7397 6.8444E-03 -9.7141E-05 3.2530E-04 -5.8726E-05 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -99.0000 4.9200E-03 4.2338E-04 -1.2426E-04 1.1148E-05 -1.1977E-06 2.1938E-16 -6.6033E-23 12 -0.4783 -2.3852E-03 -7.3382E-05 -5.0455E-05 3.8870E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -9.7556 -4.1959E-05 3.4289E-05 -1.2449E-06 5.8470E-08 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -1.4630 -1.0672E-03 8.4111E-05 -1.6348E-06 -1.0896E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0239] Table 6

[0240] Example 4

[0241] like Figure 4 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0242] 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 negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0243] In this example, the focal length F of the optical lens is 2.0256mm, the total length TTL of the optical lens is 35.0413mm, and the maximum field of view FOV of the optical lens is 195°.

[0244] In this example, the first side of the sixth lens has a point of inflection.

[0245] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0246]

[0247]

[0248] Table 7

[0249] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 8 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0250] Surf K A B C D E F G 8 -0.5962 1.7172E-03 -3.2846E-05 1.1144E-05 -7.2555E-07 4.9974E-10 -1.4721E-10 -2.8226E-18 9 1.7397 6.8444E-03 -9.7141E-05 3.2530E-04 -5.8726E-05 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -99.0000 4.9200E-03 4.2338E-04 -1.2426E-04 1.1148E-05 -1.1977E-06 2.1938E-16 -6.6033E-23 12 -0.4783 -2.3852E-03 -7.3382E-05 -5.0455E-05 3.8870E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -9.7556 -4.1959E-05 3.4289E-05 -1.2449E-06 5.8470E-08 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -1.4630 -1.0672E-03 8.4111E-05 -1.6185E-06 -1.0896E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0251] Table 8

[0252] Example 5

[0253] like Figure 5 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0254] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0255] In this example, the focal length F of the optical lens is 1.99mm, the total length TTL of the optical lens is 34.9832mm, and the maximum field of view FOV of the optical lens is 195°.

[0256] In this example, the first side of the sixth lens has a point of inflection.

[0257] Table 9 shows the basic structural parameters of the optical lens in Example 5, where the radius of curvature (Radius) and thickness / distance are in millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0258] Surf Radius Thickness Nd Vd 1 12.452 1.980 1.99 16.48 2 5.792 3.037 3 30.578 0.900 1.95 17.94 4 3.949 3.010 5 -8.257 0.700 1.83 42.73 6 5.907 4.775 1.85 23.78 7 -7.521 0.100 8 4.351 2.471 1.69 31.08 9 3.138 1.256 STO Infinity 0.100 11 -100.000 2.760 1.50 81.61 12 -4.538 0.100 13 7.839 3.553 1.50 81.61 14 -3.048 2.200 1.81 22.70 15 46.849 0.100 16 6.673 4.513 1.50 81.61 17 -3.787 0.138 18 Infinity 0.550 1.52 64.20 19 Infinity 2.000 20 Infinity 0.500 1.52 64.20 21 Infinity 0.241 IMA / /

[0259] Table 9

[0260] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 10 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0261] Surf K A B C D E F G 8 0.3661 1.0110E-03 -1.3562E-04 1.6217E-05 -2.3817E-06 4.9974E-10 -1.4721E-10 -2.8226E-18 9 0.7047 8.7980E-03 -9.2887E-05 4.2510E-04 -1.1290E-04 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -73.7220 6.5729E-03 2.1433E-04 -8.1991E-05 5.4417E-06 -1.1977E-06 2.1938E-16 -6.6033E-23 12 -0.5512 -2.4318E-03 -8.9283E-05 -6.2629E-05 5.5372E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -11.9500 6.2400E-04 -2.0186E-05 8.2373E-07 2.9033E-08 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -1.2272 1.1652E-03 -5.5294E-05 2.7569E-06 -1.7117E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0262] Table 10

[0263] Example 6

[0264] like Figure 6 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0265] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has negative optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has positive optical power, its first side surface S11 is concave, and its second side surface S12 is convex. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0266] In this example, the focal length F of the optical lens is 1.9944mm, the total length TTL of the optical lens is 35.0609mm, and the maximum field of view FOV of the optical lens is 195°.

[0267] In this example, the first side of the sixth lens has a point of inflection.

[0268] 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). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0269]

[0270]

[0271] Table 11

[0272] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 12 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0273] Surf K A B C D E F G 8 0.3661 1.0110E-03 -1.3562E-04 1.6217E-05 -2.3817E-06 4.9974E-10 -1.4721E-10 -2.8226E-18 9 0.7047 8.7980E-03 -9.2887E-05 4.2510E-04 -1.1290E-04 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -73.7220 6.5729E-03 2.1433E-04 -8.1991E-05 5.4417E-06 -1.1977E-06 2.1938E-16 -6.6033E-23 12 -0.5512 -2.4318E-03 -8.9283E-05 -6.2629E-05 5.5372E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -11.9500 6.2400E-04 -2.0186E-05 8.2373E-07 2.9033E-08 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -1.2272 1.1535E-03 -5.5294E-05 2.7569E-06 -1.7117E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0274] Table 12

[0275] Example 7

[0276] like Figure 7 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0277] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has negative optical power, its first side surface S11 is concave, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0278] In this example, the focal length F of the optical lens is 1.9466mm, the total length TTL of the optical lens is 34.7678mm, and the maximum field of view FOV of the optical lens is 195°.

[0279] In this example, both the second side of the fifth lens and the first side of the sixth lens have inflection points.

[0280] Table 13 shows the basic structural parameters of the optical lens in Example 7, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0281] Surf Radius Thickness Nd Vd 1 11.930 2.000 1.99 16.48 2 5.220 2.979 3 28.208 0.900 1.95 17.94 4 3.879 2.566 5 -7.136 0.700 1.83 42.73 6 5.615 4.670 1.85 23.78 7 -7.016 0.100 8 8.158 2.261 1.69 31.08 9 13.559 1.995 STO Infinity 0.100 11 -99.000 2.200 1.50 81.61 12 95.699 0.100 13 4.330 3.522 1.50 81.61 14 -3.082 2.200 1.81 22.70 15 21.802 0.100 16 5.203 5.187 1.50 81.61 17 -3.118 0.138 18 Infinity 0.550 1.52 64.20 19 Infinity 2.000 20 Infinity 0.500 1.52 64.20 21 Infinity -0.046 IMA / /

[0282] Table 13

[0283] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 14 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0284] Surf K A B C D E F G 8 -3.1891 5.7934E-04 -7.2699E-05 -2.5845E-06 -6.3803E-07 4.9974E-10 -1.4721E-10 -2.8226E-18 9 -71.8410 2.0901E-03 -2.6858E-06 -7.6564E-05 3.8721E-06 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -115.0900 8.8285E-03 -1.4828E-04 -1.2335E-04 1.7228E-05 -1.1977E-06 2.1938E-16 -6.6033E-23 12 16.4120 5.6290E-03 -1.2862E-05 -1.7727E-05 -4.6891E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -3.8815 2.2985E-03 -1.1964E-04 5.3395E-06 -1.0095E-07 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -3.5255 -4.5882E-04 5.5620E-05 3.3183E-06 -3.0661E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0285] Table 14

[0286] Example 8

[0287] like Figure 8 As shown, the optical lens, from the first side to the second side, includes, in sequence, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, an aperture stop STO, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a filter, a protective glass, and an imaging surface IMA. For the sake of brevity, descriptions similar to those in Example 1 will be omitted.

[0288] 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 convex, and its second side surface S4 is concave. The third lens L3 has negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 has positive optical power, its first side surface S6 is convex, and its second side surface S7 is convex. The fifth lens L5 has positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The sixth lens L6 has negative optical power, its first side surface S11 is concave, and its second side surface S12 is concave. The seventh lens L7 has positive optical power, its first side surface S13 is convex, and its second side surface S14 is convex. The eighth lens L8 has negative optical power; its first side surface S14 and second side surface S15 are both concave. The ninth lens L9 has positive optical power; its first side surface S16 and second side surface S17 are both convex. The filter has a first side surface S18 and a second side surface S19. The protective glass has a first side surface S20 and a second side surface S21. Light from the object passes sequentially through surfaces S1 to S21 and is finally imaged onto the imaging plane IMA.

[0289] In this example, the focal length F of the optical lens is 1.9484mm, the total length TTL of the optical lens is 34.6759mm, and the maximum field of view FOV of the optical lens is 195°.

[0290] In this example, both the second side of the fifth lens and the first side of the sixth lens have inflection points.

[0291] Table 15 shows the basic structural parameters of the optical lens in Example 8, where the units for radius of curvature (Radius) and thickness / distance are millimeters (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0292]

[0293]

[0294] Table 15

[0295] In this example, the fifth, sixth, and ninth lenses are aspherical lenses. Table 16 below shows the conic coefficient k and the coefficients of each higher-order term that can be used for the aspherical lens surfaces in this example. The surface shape of each aspherical lens can be defined using, but is not limited to, formula (1) in Example 1.

[0296] Surf K A B C D E F G 8 -3.1891 5.7934E-04 -7.2699E-05 -2.5845E-06 -6.3803E-07 4.9974E-10 -1.4721E-10 -2.8226E-18 9 -71.8410 2.0901E-03 -2.6858E-06 -7.6564E-05 3.8721E-06 3.3145E-16 -7.2650E-21 -2.7978E-23 11 -115.0900 8.8285E-03 -1.4828E-04 -1.2335E-04 1.7228E-05 -1.1977E-06 2.1938E-16 -6.6033E-23 12 16.4120 5.6290E-03 -1.2862E-05 -1.7727E-05 -4.6891E-06 -3.5056E-07 -2.1239E-15 -1.0500E-21 16 -3.8815 2.2985E-03 -1.1964E-04 5.3395E-06 -1.0095E-07 -5.6747E-10 -6.0495E-12 1.8858E-20 17 -3.5255 -4.5882E-04 5.5620E-05 3.3183E-06 -3.0661E-07 1.3513E-08 -3.2918E-10 -4.7513E-18

[0297] Table 16 summarizes that Examples 1 to 8 satisfy the relationships shown in Table 17.

[0298] Parameters / Examples one two three Four five six seven eight TTL / H / FOV 0.0236 0.0233 0.0244 0.0244 0.0247 0.0246 0.0233 0.0233 |(HF*θ) / (F*θ)| 0.0592 0.0683 0.0668 0.0701 0.0740 0.0765 0.1561 0.1517 BFL / TTL 0.1001 0.1001 0.0973 0.0982 0.0980 0.1002 0.0917 0.0919 F / ENPD 2.0000 1.9999 2.0000 2.0000 2.0000 2.0000 2.0000 2.0000 (FOV×F) / H 54.0936 53.6312 53.7079 53.5423 53.3483 53.2226 49.5583 49.7490 |(H / 2) / (F*tan(θ / 2))| 0.2373 0.2393 0.2390 0.2397 0.2406 0.2412 0.2590 0.2580 R8B / R9F 1.3394 1.3394 3.3521 3.3521 7.0211 7.0211 4.1902 4.1902 R6F / F -9.1378 -9.0951 -94.3937 -94.2353 -50.2513 -49.6390 -50.8579 -50.8109 d23 / TTL 0.0842 0.0842 0.0575 0.0574 0.0860 0.0858 0.0738 0.0740 |F / R2F|+|F / R2B| 0.5169 0.5227 0.3753 0.3759 0.5690 0.5702 0.5708 0.5714 F2 / R2B -1.2345 -1.2462 -0.9684 -0.9684 -1.2011 -1.2011 -1.2146 -1.2146 |F3 / F4| 0.8650 0.8651 0.7916 0.7916 0.8700 0.8702 0.8335 0.8335 |Rj1| / (Φj1 / 2) 1.5524 1.5351 1.7124 1.7113 1.5850 1.5843 1.1077 1.6773 |F78 / F| 6.6102 6.5792 8.0466 7.9131 11.8248 11.5445 40.9810 40.9431 |F6| / |F7| 1.4591 1.4591 2.2309 2.2461 1.9118 1.9257 22.6620 22.6620 |Rj2| / (Φj2 / 2) 1.6612 1.6486 1.1983 1.1850 1.1623 1.1493 1.3170 1.3190 R8F / (R9F+d8) -0.6772 -0.6772 -0.4079 -0.4039 -0.3436 -0.3401 -0.4162 -0.4162 TTL / (H / 2) 9.1939 9.0709 9.5353 9.4999 9.6188 9.5963 9.0785 9.0809 R9F / (R9F-R9B) 0.5136 0.5136 0.6130 0.6130 0.6379 0.6379 0.6253 0.6253 D18 / H 0.9378 0.9336 1.1235 1.1334 1.1383 1.1518 1.0855 1.0864

[0299] Table 18 provides the complete set of focal length values ​​F (in millimeters) for the optical lenses of Examples 1 to 8.

[0300] Parameters / Examples one two three Four five six seven eight F 2.1046 2.1145 2.0222 2.0256 1.9900 1.9944 1.9466 1.9484 ENPD 1.0523 1.0573 1.0111 1.0128 0.9950 0.9972 0.9733 0.9742 TTL 34.8763 34.8693 35.0047 35.0413 34.9832 35.0609 34.7678 34.6759 FOV 195.0000 195.0000 195.0000 195.0000 195.0000 195.0000 195.0000 195.0000 θ 3.4034 3.4034 3.4034 3.4034 3.4034 3.4034 3.4034 3.4034 H 7.5868 7.6882 7.3421 7.3772 7.2739 7.3072 7.6594 7.6371 BFL 3.4915 3.4915 3.4056 3.4423 3.4294 3.5141 3.1882 3.1882 F1 -11.6436 -11.6436 -7.5560 -7.5560 -12.5347 -12.5347 -10.7499 -10.7120 F2 -5.7241 -5.7787 -5.5182 -5.5182 -4.7434 -4.7434 -4.7116 -4.7116 F3 -4.3636 -4.3644 -3.7931 -3.7931 -3.9876 -3.9885 -3.6298 -3.6298 F4 5.0448 5.0448 4.7918 4.7918 4.5832 4.5832 4.3547 4.3547 F5 43.7066 43.7066 27.5898 27.5898 -99.9995 -99.9995 24.9547 24.3910 F6 8.4928 8.4928 11.1926 11.1926 9.4162 9.4198 -96.9549 -96.9549 F7 5.8205 5.8205 5.0170 4.9831 4.9254 4.8915 4.2783 4.2783 F8 -3.3671 -3.3671 -3.1083 -3.0815 -3.3978 -3.3659 -3.1435 -3.1435 F9 6.3276 6.3276 5.1946 5.1946 5.6432 5.6432 4.9220 4.9092 R2F 33.3845 31.7153 -99.0000 -99.0000 30.5782 30.5782 28.2078 28.2078 R2B 4.6369 4.6369 5.6981 5.6981 3.9493 3.9493 3.8790 3.8790 Rj1 6.2484 6.2484 6.0898 6.0898 5.9073 5.9073 5.6150 5.6150 R6F -19.2315 -19.2315 -190.8830 -190.8830 -100.0000 -99.0000 -99.0000 -99.0000 Rj2 -4.4069 -4.4069 -3.1427 -3.1113 -3.0483 -3.0178 -3.0815 -3.0815 R8F -4.4069 -4.4069 -3.1427 -3.1113 -3.0483 -3.0178 -3.0815 -3.0815 R8B 7.7787 7.7787 18.4500 18.4500 46.8486 46.8486 21.8022 21.8022 R9F 5.8077 5.8077 5.5040 5.5040 6.6725 6.6725 5.2032 5.2032 R9B -5.5011 -5.5011 -3.4747 -3.4747 -3.7870 -3.7870 -3.1180 -3.1180 d23 2.9353 2.9353 2.0127 2.0127 3.0097 3.0097 2.5658 2.5658 Φj1 8.0499 8.1407 7.1126 7.1171 7.4539 7.4571 10.1378 6.6952 Φj2 5.3057 5.3463 5.2453 5.2513 5.2453 5.2517 4.6796 4.6725 D18 7.1149 7.1774 8.2485 8.3611 8.2799 8.4166 8.3146 8.2967 F78 -13.912 -13.912 -16.272 -16.029 -23.531 -23.024 79.774 79.774 d8 0.700 0.700 2.200 2.200 2.200 2.200 2.200 2.200

[0301] Table 18

[0302] 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.

[0303] 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.

[0304] 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.

[0305] 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, including: A first lens having negative optical power, a first side surface of the first lens being convex, and a second side surface of the first lens being concave; The second lens has negative optical power and its second side surface is concave. The third lens has negative optical power, and the first side surface of the third lens is concave, and the second side surface of the third lens is concave. The fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex. The fifth lens has optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave; The sixth lens has optical power, and the first side surface of the sixth lens is concave. The seventh lens has positive optical power, and its first side surface is convex, and its second side surface is convex. The eighth lens has negative optical power, and the first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave. A ninth lens having positive optical power, wherein the first side surface of the ninth lens is convex and the second side surface of the ninth lens is convex; The bonding joint between the third lens and the fourth lens forms a first bonding surface, and the central radius of curvature Rj1 of the first bonding surface and the effective aperture Φj1 of the first bonding surface satisfy the following condition: 0.8≤|Rj1| / (Φj1 / 2)≤1.7124.

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

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

4. The optical lens according to claim 1, characterized in that, The fifth lens has positive optical power.

5. The optical lens according to claim 1, characterized in that, The fifth lens has negative optical power.

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

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

8. The optical lens according to claim 1, characterized in that, At least two of the first to the ninth lenses are aspherical lenses.

9. The optical lens according to claim 1, characterized in that, The fifth lens, the sixth lens, and the ninth lens are aspherical lenses.

10. The optical lens according to claim 1, characterized in that, The third lens and the fourth lens are cemented together to form a cemented lens, and the seventh lens and the eighth lens are cemented together to form a cemented lens.

11. The optical lens according to claim 1, characterized in that, The optical lens also includes an aperture stop, which is located between the fifth lens and the sixth lens.

12. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens has a recurved point.

13. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens has a curvature point, and the first side surface of the sixth lens has a curvature point.

14. The optical lens according to any one of claims 1 to 13, characterized in that, The maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.0233 / ° ≤ TTL / H / FOV ≤ 0.0247 / °.

15. The optical lens according to any one of claims 1 to 13, characterized in that, The maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following condition: 0.0592≤|(HF*θ) / (F*θ)|≤0.1561.

16. The optical lens according to any one of claims 1 to 13, characterized in that, The maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following condition: 0.2373≤|(H / 2) / (F*tan(θ / 2))|≤0.2590.

17. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R8B of the second side surface of the eighth lens and the radius of curvature R9F of the first side surface of the ninth lens satisfy the following condition: 0.52≤R8B / R9F≤7.0211.

18. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R6F of the first side of the sixth lens and the total focal length F of the optical lens satisfy the following condition: -94.3937≤R6F / F≤-7.

19. The optical lens according to any one of claims 1 to 13, characterized in that, The air gap d23 between the centers of the second lens and the third lens satisfies the following condition with respect to the total length TTL of the optical lens: 0.0574≤d23 / TTL≤0.

1.

20. The optical lens according to any one of claims 1 to 13, characterized in that, The optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the following condition: 0.1002 ≥ BFL / TTL ≥ 0.

03.

21. The optical lens according to any one of claims 1 to 13, characterized in that, The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 54.0936° ≥ (FOV × F) / H ≥ 45°.

22. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the total focal length F of the optical lens satisfy the following condition: 0.3753≤|F / R2F|+|F / R2B|≤1.

23. The optical lens according to any one of claims 1 to 13, characterized in that, The focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following condition: -1.2462≤F2 / R2B≤-0.

5.

24. The optical lens according to any one of claims 1 to 13, characterized in that, The entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.9999≤F / ENPD≤2.

3.

25. The optical lens according to any one of claims 1 to 13, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.55≤|F3 / F4|≤0.8702.

26. The optical lens according to any one of claims 1 to 13, characterized in that, The combined focal length F78 of the seventh lens and the eighth lens satisfies the following relationship with the total focal length F of the optical lens: 40.9810≥|F78 / F|≥3.

27. The optical lens according to any one of claims 1 to 13, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: 22.6620≥|F6| / |F7|≥1.

01.

28. The optical lens according to any one of claims 1 to 13, characterized in that, The seventh lens and the eighth lens are bonded together to form a second bonding surface. The central radius of curvature Rj2 of the second bonding surface and the effective aperture Φj2 of the second bonding surface satisfy the following condition: 1.6612≥|Rj2| / (Φj2 / 2)≥0.

8.

29. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following condition: -0.6772≤R8F / (R9F+d8)≤-0.

1.

30. The optical lens according to any one of claims 1 to 13, characterized in that, The total optical length TTL of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 9.6188≥TTL / (H / 2)≥7.

31. The optical lens according to any one of claims 1 to 13, characterized in that, The radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the following condition: 0.5136≤R9F / (R9F-R9B)≤0.

9.

32. The optical lens according to any one of claims 1 to 13, characterized in that, The aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.75≤D18 / H≤1.

5.

33. The optical lens according to any one of claims 1 to 13, characterized in that, The optical lens must satisfy at least one of the following conditions: -94.3937≤R6F / F≤-9, 0.0574≤d23 / TTL≤0.09, 40.9810≥|F78 / F|≥5, 22.6620≥|F6 / F7|≥1.2, wherein the total optical length of the optical lens is TTL, the total focal length of the optical lens group is F, the radius of curvature of the first side of the sixth lens is R6F, the central air gap between the second lens and the third lens is d23, the combined focal length of the seventh lens and the eighth lens is F78, the focal length of the sixth lens is F6, and the focal length of the seventh lens is F7.

34. The optical lens according to any one of claims 1 to 13, characterized in that, The following conditions must be met: 0.0917≤BFL / TTL≤0.1002, 1.9999≤F / ENPD≤2.0000, 49.5583°≤(FOV×F) / H≤54.0936°, 1.3394≤R8B / R9F≤7.0211, -94.3937≤R6F / F≤-9.0951, 0.0574≤d23 / TTL≤0.0860, 0.3753≤|F / R2F|+|F / R2B|≤0.5714, -1.2462≤F2 / R2B≤-0.9684, 0.7916≤|F3 / F4|≤0.8702, 1.1077≤|Rj1| / (Φj1 / 2)≤1.7124, 6.5792≤|F78 / F|≤40.9810, 1.4591≤|F6 / F7|≤22.6620, 1.1493≤|Rj2| / (Φj2 / 2)≤1.6612, -0.6772≤R8F / (R9F+d8)≤-0.3401, 9.0709≤TTL / (H / 2)≤9.6188; 0.5136≤R9F / (R9F-R9B)≤0.6379, 0.9336≤D18 / H≤1.1518, where the maximum field of view of the optical lens is FOV, the total optical length of the optical lens is TTL, and the maximum field of view of the optical lens corresponds to... The corresponding image height is H, the total focal length of the optical lens group is F, the radius of curvature of the second side of the eighth lens is R8B, the radius of curvature of the first side of the ninth lens is R9F, the radius of curvature of the first side of the sixth lens is R6F, the central air gap between the second and third lenses is d23, the optical back focal length of the optical lens is BFL, the radius of curvature of the first side of the second lens is R2F, the radius of curvature of the second side of the second lens is R2B, the entrance pupil diameter of the optical lens is ENPD, the focal length of the second lens is F2, the focal length of the third lens is F3, the focal length of the fourth lens is F4, and the third and fourth lenses... The bonding joint forms a first bonding surface with a central radius of curvature of Rj1 and an effective aperture of Φj1. The combined focal length of the seventh and eighth lenses is F78, the focal length of the sixth lens is F6, and the focal length of the seventh lens is F7. The bonding joint of the seventh and eighth lenses forms a second bonding surface with a central radius of curvature of Rj2 and an effective aperture of Φj2. The radius of curvature of the first side surface of the eighth lens is R8F, the central thickness of the eighth lens is d8, the radius of curvature of the second side surface of the ninth lens is R9B, and the aperture of the second side surface of the ninth lens is D18.

35. An optical lens, characterized in that, The optical lens has a total of nine lenses, including: A first lens, the first lens having negative optical power; A second lens, the second lens having negative optical power; A third lens, wherein the third lens has negative optical power; A fourth lens, wherein the fourth lens has positive optical power; The fifth lens has optical power; A sixth lens, wherein the sixth lens has optical power; The seventh lens has positive optical power; The eighth lens has a negative optical power; The ninth lens has positive optical power; Wherein, the radius of curvature R8B of the second side surface of the eighth lens and the radius of curvature R9F of the first side surface of the ninth lens satisfy the following condition: 0.52≤R8B / R9F≤7.0211; The bonding joint between the third lens and the fourth lens forms a first bonding surface, and the central radius of curvature Rj1 of the first bonding surface and the effective aperture Φj1 of the first bonding surface satisfy the following condition: 0.8≤|Rj1| / (Φj1 / 2)≤1.7124.

36. The optical lens according to claim 35, characterized in that, The first side surface of the first lens is convex, and the second side surface of the first lens is concave.

37. The optical lens according to claim 35, characterized in that, The first side surface of the second lens is convex, and the second side surface of the second lens is concave.

38. The optical lens according to claim 35, characterized in that, The first side surface of the second lens is concave, and the second side surface of the second lens is concave.

39. The optical lens according to claim 35, characterized in that, The first side surface of the third lens is concave, and the second side surface of the third lens is concave.

40. The optical lens according to claim 35, characterized in that, The first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex.

41. The optical lens according to claim 35, characterized in that, The fifth lens has positive optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

42. The optical lens according to claim 35, characterized in that, The fifth lens has negative optical power, the first side of the fifth lens is convex, and the second side of the fifth lens is concave.

43. The optical lens according to claim 35, characterized in that, The sixth lens has positive optical power, the first side of the sixth lens is concave, and the second side of the sixth lens is convex.

44. The optical lens according to claim 35, characterized in that, The sixth lens has negative optical power, and the first side surface of the sixth lens is concave, and the second side surface of the sixth lens is concave.

45. The optical lens according to claim 35, characterized in that, The first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex.

46. ​​The optical lens according to claim 35, characterized in that, The first side surface of the eighth lens is concave, and the second side surface of the eighth lens is concave.

47. The optical lens according to claim 35, characterized in that, The first side surface of the ninth lens is convex, and the second side surface of the ninth lens is convex.

48. The optical lens according to claim 35, characterized in that, At least two of the first to the ninth lenses are aspherical lenses.

49. The optical lens according to claim 35, characterized in that, The fifth lens, the sixth lens, and the ninth lens are aspherical lenses.

50. The optical lens according to claim 35, characterized in that, The third lens and the fourth lens are cemented together to form a cemented lens, and the seventh lens and the eighth lens are cemented together to form a cemented lens.

51. The optical lens according to claim 35, characterized in that, The optical lens also includes an aperture stop, which is located between the fifth lens and the sixth lens.

52. The optical lens according to claim 35, characterized in that, The first side surface of the sixth lens has a recurved point.

53. The optical lens according to claim 35, characterized in that, The second side surface of the fifth lens has a curvature point, and the first side surface of the sixth lens has a curvature point.

54. The optical lens according to any one of claims 35 to 53, characterized in that, The maximum field of view (FOV) of the optical lens, the total optical length (TTL) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.0233 / ° ≤ TTL / H / FOV ≤ 0.0247 / °.

55. The optical lens according to any one of claims 35 to 53, characterized in that, The maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following condition: 0.0592≤|(HF*θ) / (F*θ)|≤0.1561.

56. The optical lens according to any one of claims 35 to 53, characterized in that, The maximum field of view angle θ of the optical lens, the total focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy the following condition: 0.2373≤|(H / 2) / (F*tan(θ / 2))|≤0.2590.

57. The optical lens according to any one of claims 35 to 53, characterized in that, The radius of curvature R6F of the first side of the sixth lens and the total focal length F of the optical lens satisfy the following condition: -94.3937≤R6F / F≤-7.

58. The optical lens according to any one of claims 35 to 53, characterized in that, The air gap d23 between the centers of the second lens and the third lens satisfies the following condition with respect to the total length TTL of the optical lens: 0.0574≤d23 / TTL≤0.

1.

59. The optical lens according to any one of claims 35 to 53, characterized in that, The optical back focal length (BFL) of the optical lens and the total length (TTL) of the optical lens satisfy the following condition: 0.1002 ≥ BFL / TTL ≥ 0.

03.

60. The optical lens according to any one of claims 35 to 53, characterized in that, The maximum field of view (FOV) of the optical lens, the total focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens satisfy the following condition: 54.0936° ≥ (FOV × F) / H ≥ 45°.

61. The optical lens according to any one of claims 35 to 53, characterized in that, The radius of curvature R2F of the first side surface of the second lens, the radius of curvature R2B of the second side surface of the second lens, and the total focal length F of the optical lens satisfy the following condition: 0.3753≤|F / R2F|+|F / R2B|≤1.

62. The optical lens according to any one of claims 35 to 53, characterized in that, The focal length F2 of the second lens and the radius of curvature R2B of the second side surface of the second lens satisfy the following condition: -1.2462≤F2 / R2B≤-0.

5.

63. The optical lens according to any one of claims 35 to 53, characterized in that, The entrance pupil diameter ENPD of the optical lens and the total focal length F of the optical lens satisfy the following condition: 1.9999≤F / ENPD≤2.

3.

64. The optical lens according to any one of claims 35 to 53, characterized in that, The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy the following condition: 0.55≤|F3 / F4|≤0.8702.

65. The optical lens according to any one of claims 35 to 53, characterized in that, The combined focal length F78 of the seventh lens and the eighth lens satisfies the following relationship with the total focal length F of the optical lens: 40.9810≥|F78 / F|≥3.

66. The optical lens according to any one of claims 35 to 53, characterized in that, The focal length F6 of the sixth lens and the focal length F7 of the seventh lens satisfy the following condition: 22.6620≥|F6| / |F7|≥1.

01.

67. The optical lens according to any one of claims 35 to 53, characterized in that, The seventh lens and the eighth lens are bonded together to form a second bonding surface. The central radius of curvature Rj2 of the second bonding surface and the effective aperture Φj2 of the second bonding surface satisfy the following condition: 1.6612≥|Rj2| / (Φj2 / 2)≥0.

8.

68. The optical lens according to any one of claims 35 to 53, characterized in that, The radius of curvature R8F of the first side surface of the eighth lens, the radius of curvature R9F of the first side surface of the ninth lens, and the center thickness d8 of the eighth lens satisfy the following condition: -0.6772≤R8F / (R9F+d8)≤-0.

1.

69. The optical lens according to any one of claims 35 to 53, characterized in that, The total optical length TTL of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 9.6188≥TTL / (H / 2)≥7.

70. The optical lens according to any one of claims 35 to 53, characterized in that, The radius of curvature R9F of the first side surface of the ninth lens and the radius of curvature R9B of the second side surface of the ninth lens satisfy the following condition: 0.5136≤R9F / (R9F-R9B)≤0.

9.

71. The optical lens according to any one of claims 35 to 53, characterized in that, The aperture D18 of the second side of the ninth lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 0.75≤D18 / H≤1.

5.

72. The optical lens according to any one of claims 35 to 53, characterized in that, The optical lens must satisfy at least one of the following conditions: -94.3937≤R6F / F≤-9, 0.0574≤d23 / TTL≤0.09, 40.9810≥|F78 / F|≥5, 22.6620≥||F6 / F7|≥1.2, wherein the total optical length of the optical lens is TTL, the total focal length of the optical lens group is F, the radius of curvature of the first side of the sixth lens is R6F, the central air gap between the second lens and the third lens is d23, the combined focal length of the seventh lens and the eighth lens is F78, the focal length of the sixth lens is F6, and the focal length of the seventh lens is F7.

73. The optical lens according to any one of claims 35 to 53, characterized in that, The following conditions must be met: 0.0917≤BFL / TTL≤0.1002, 1.9999≤F / ENPD≤2.0000, 49.5583°≤(FOV×F) / H≤54.0936°, 1.3394≤R8B / R9F≤7.0211, -94.3937≤R6F / F≤-9.0951, 0.0574≤d23 / TTL≤0.0860, 0.3753≤|F / R2F|+|F / R2B|≤0.5714, -1.2462≤F2 / R2B≤-0.9684, 0.7916≤|F3 / F4|≤0.8702, 1.1077≤|Rj1| / (Φj1 / 2)≤1.7124, 6.5792≤|F78 / F|≤40.9810, 1.4591≤|F6 / F7|≤22.6620, 1.1493≤|Rj2| / (Φj2 / 2)≤1.6612, -0.6772≤R8F / (R9F+d8)≤-0.3401, 9.0709≤TTL / (H / 2)≤9.6188; 0.5136≤R9F / (R9F-R9B)≤0.6379, 0.9336≤D18 / H≤1.1518, where the maximum field of view of the optical lens is FOV, the total optical length of the optical lens is TTL, and the maximum field of view of the optical lens corresponds to... The corresponding image height is H, the total focal length of the optical lens group is F, the radius of curvature of the second side of the eighth lens is R8B, the radius of curvature of the first side of the ninth lens is R9F, the radius of curvature of the first side of the sixth lens is R6F, the central air gap between the second and third lenses is d23, the optical back focal length of the optical lens is BFL, the radius of curvature of the first side of the second lens is R2F, the radius of curvature of the second side of the second lens is R2B, the entrance pupil diameter of the optical lens is ENPD, the focal length of the second lens is F2, the focal length of the third lens is F3, the focal length of the fourth lens is F4, and the third and fourth lenses... The bonding joint forms a first bonding surface with a central radius of curvature of Rj1 and an effective aperture of Φj1. The combined focal length of the seventh and eighth lenses is F78, the focal length of the sixth lens is F6, and the focal length of the seventh lens is F7. The bonding joint of the seventh and eighth lenses forms a second bonding surface with a central radius of curvature of Rj2 and an effective aperture of Φj2. The radius of curvature of the first side surface of the eighth lens is R8F, the central thickness of the eighth lens is d8, the radius of curvature of the second side surface of the ninth lens is R9B, and the aperture of the second side surface of the ninth lens is D18.

74. An electronic device, characterized in that, It includes an optical lens as described in any one of claims 1 to 73 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images