Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device comprising the same. The optical lens comprises, in order from a first side to a second side along an optical axis: a first lens having negative refractive power, a first side surface of which is a convex surface and a second side surface of which is a concave surface; a second lens having negative refractive power, a first side surface of which is a convex surface and a second side surface of which is a concave surface; a third lens having negative refractive power, a first side surface of which is a concave surface; a fourth lens having positive refractive power, a first side surface of which is a convex surface; a fifth lens having positive refractive power, a first side surface of which is a convex surface; a sixth lens having positive refractive power, a second side surface of which is a convex surface; a seventh lens having positive refractive power, a first side surface of which is a convex surface and a second side surface of which is a convex surface; an eighth lens having negative refractive power, a first side surface of which is a concave surface and a second side surface of which is a convex surface; and a ninth lens having positive refractive power, a first side surface of which is a concave surface and a second side surface of which is a convex surface.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0002] With the improvement of imaging quality, optical lenses have been widely used in various fields, such as intelligent detection, security monitoring, smartphones, and automotive driver assistance systems, playing an irreplaceable role. At the same time, lens manufacturers in various fields are investing heavily in the research and development of lens performance to enhance the competitiveness of their products.

[0003] In recent years, with the continuous advancement of imaging technology, optical lenses have been widely used in both imaging and projection technologies. For example, in imaging technology, optical lenses can be installed as automotive lenses on autonomous vehicles, where they are key components for acquiring external information in autonomous driving assistance systems. With the rapid development of autonomous driving assistance systems, these systems require larger, higher-resolution chips, thus placing increasingly higher demands on the resolution of the lenses themselves. Simultaneously, due to the complexity of real-world road detection, lenses need to have good recognition capabilities for objects of different colors, thus requiring high chromatic aberration accuracy. Furthermore, for safety reasons, automotive lenses used in autonomous driving applications require high stability and must be able to withstand various harsh environments to avoid significant performance degradation under different conditions.

[0004] However, current optical lenses on the market have many problems that prevent them from meeting the actual needs of automotive lenses. For example, the chips they use are small and have low angular resolution, resulting in poor lens resolution performance. Although the resolution can reach megapixels, aberrations such as chromatic aberration, astigmatism, and distortion are quite serious. They have poor light transmission capabilities and are difficult to adapt to low-light environments such as nighttime or rainy days. The system has poor thermal stability in high and low temperature environments, resulting in unclear images and other adverse effects under these conditions. After returning to normal temperature from high temperature, the resolution is also difficult to meet the requirements, which greatly reduces the safety of autonomous driving. Summary of the Invention

[0005] This application provides an optical lens. The optical lens comprises, sequentially from a first side to a second side along the optical axis: a first lens having negative optical power, with a first side surface being convex and a second side surface being concave; a second lens having negative optical power, with a first side surface being convex and a second side surface being concave; a third lens having negative optical power, with a first side surface being concave; a fourth lens having positive optical power, with a first side surface being convex; a fifth lens having positive optical power, with a first side surface being convex; a sixth lens having positive optical power, with a second side surface being convex; a seventh lens having positive optical power, with a first side surface being convex and a second side surface being convex; an eighth lens having negative optical power, with a first side surface being concave and a second side surface being convex; and a ninth lens having positive optical power, with a first side surface being concave and a second side surface being convex.

[0006] In one embodiment, the second side surface of the third lens may be concave or convex.

[0007] In one embodiment, the second side surface of the fourth lens may be concave or convex.

[0008] In one embodiment, the second side surface of the fifth lens may be concave or convex.

[0009] In one embodiment, the first side surface of the sixth lens may be concave or convex.

[0010] In one embodiment, the seventh lens and the eighth lens may form a cemented lens.

[0011] In one embodiment, the optical lens can satisfy: TTL / H / FOV≤0.1, where TTL is the total length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

[0012] In one embodiment, the optical lens can satisfy: |(HF×θ) / (F×θ)|≤0.5, where H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, and F is the total effective focal length of the optical lens.

[0013] In one embodiment, the optical lens may satisfy: 0.1≤|(H / 2) / (F×tan(θ / 2))|≤1.5, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians.

[0014] In one embodiment, the optical lens may satisfy: BFL / TTL≥0.01, where BFL is the back focal length of the optical lens and TTL is the total length of the optical lens.

[0015] In one embodiment, the optical lens can satisfy: (FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0016] In one embodiment, the optical lens may satisfy: F / EPND≤2.5, where F is the total effective focal length of the optical lens and EPND is the entrance pupil diameter of the optical lens.

[0017] In one embodiment, the optical lens may satisfy: Nd1 ≥ 1.85, where Nd1 is the refractive index of the first lens.

[0018] In one embodiment, the optical lens may satisfy: |F / R3|+|F / R4|≤1.5, where F is the total effective focal length of the optical lens, R3 is the center radius of curvature of the first side surface of the second lens, and R4 is the center radius of curvature of the second side surface of the second lens.

[0019] In one embodiment, the optical lens may satisfy: -5≤F2 / R4≤-0.01, where F2 is the effective focal length of the second lens and R4 is the central radius of curvature of the second side surface of the second lens.

[0020] In one embodiment, the optical lens may satisfy: 0.3≤|F3 / F4|≤1.5, where F3 is the effective focal length of the third lens and F4 is the effective focal length of the fourth lens.

[0021] In one embodiment, the optical lens can satisfy: (d7×BFL) / (d7+BFL)≥0, where d7 is the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, and BFL is the back focal length of the optical lens.

[0022] In one embodiment, the optical lens may satisfy: 0.001≤|sag6 / sag7|≤1.5, where sag6 is the sagitta of the first side of the sixth lens and sag7 is the sagitta of the second side of the sixth lens.

[0023] In one embodiment, the second surface of the seventh lens is cemented with the first surface of the eighth lens to form the cemented surface of the cemented lens; and the optical lens can satisfy: 0.5≤|R| / (Φ / 2)≤2.5, where R is the radius of curvature of the cemented surface of the cemented lens, and Φ is the effective aperture of the cemented surface of the cemented lens.

[0024] In one embodiment, the optical lens may satisfy: 1.2≤Nd7≤1.65 and 1.6≤Nd8≤2.5, where Nd7 is the refractive index of the seventh lens and Nd8 is the refractive index of the eighth lens.

[0025] In one embodiment, the optical lens may satisfy: F6 / F7≥0.01, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens.

[0026] In one embodiment, the optical lens may satisfy: 0.8≤|F7 / F8|≤2, where F7 is the effective focal length of the seventh lens and F8 is the effective focal length of the eighth lens.

[0027] In one embodiment, the optical lens may satisfy: |F78 / F|≥3, where F78 is the combined focal length of the seventh and eighth lenses, and F is the total effective focal length of the optical lens.

[0028] In one embodiment, the optical lens may satisfy: F7×F8 / F≤-5, where F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F is the total effective focal length of the optical lens.

[0029] In one embodiment, the optical lens may satisfy: F9 / F≥2, where F9 is the effective focal length of the ninth lens and F is the total effective focal length of the optical lens.

[0030] This application also provides an optical lens. The optical lens, along its optical axis from a first side to a second side, sequentially includes: 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 positive optical power; a sixth lens having positive optical power; a seventh lens having positive optical power; an eighth lens having negative optical power; and a ninth lens having positive optical power. The optical lens satisfies: F6 / F7 ≥ 0.01, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens.

[0031] In one embodiment, the first side surface of the first lens may be convex, and the second side surface may be concave.

[0032] In one embodiment, the first side surface of the second lens may be convex, and the second side surface may be concave.

[0033] In one embodiment, the first side surface of the third lens may be concave, and the second side surface may be either concave or convex.

[0034] In one embodiment, the first side surface of the fourth lens may be convex, and the second side surface may be concave or convex.

[0035] In one embodiment, the first side surface of the fifth lens may be convex, and the second side surface may be concave or convex.

[0036] In one embodiment, the first side surface of the sixth lens may be concave or convex, and the second side surface may be convex.

[0037] In one embodiment, the first side surface of the seventh lens may be convex, and the second side surface may be convex.

[0038] In one embodiment, the first side surface of the eighth lens may be concave, and the second side surface may be convex.

[0039] In one embodiment, the first side surface of the ninth lens may be concave, and the second side surface may be convex.

[0040] In one embodiment, the seventh lens and the eighth lens form a cemented lens.

[0041] In one embodiment, the optical lens can satisfy: TTL / H / FOV≤0.1, where TTL is the total length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

[0042] In one embodiment, the optical lens can satisfy: |(HF×θ) / (F×θ)|≤0.5, where H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, and F is the total effective focal length of the optical lens.

[0043] In one embodiment, the optical lens may satisfy: 0.1≤|(H / 2) / (F×tan(θ / 2))|≤1.5, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians.

[0044] In one embodiment, the optical lens may satisfy: BFL / TTL≥0.01, where BFL is the back focal length of the optical lens and TTL is the total length of the optical lens.

[0045] In one embodiment, the optical lens can satisfy: (FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

[0046] In one embodiment, the optical lens may satisfy: F / EPND≤2.5, where F is the total effective focal length of the optical lens and EPND is the entrance pupil diameter of the optical lens.

[0047] In one embodiment, the optical lens may satisfy: Nd1 ≥ 1.85, where Nd1 is the refractive index of the first lens.

[0048] In one embodiment, the optical lens may satisfy: |F / R3|+|F / R4|≤1.5, where F is the total effective focal length of the optical lens, R3 is the center radius of curvature of the first side surface of the second lens, and R4 is the center radius of curvature of the second side surface of the second lens.

[0049] In one embodiment, the optical lens may satisfy: -5≤F2 / R4≤-0.01, where F2 is the effective focal length of the second lens and R4 is the central radius of curvature of the second side surface of the second lens.

[0050] In one embodiment, the optical lens may satisfy: 0.3≤|F3 / F4|≤1.5, where F3 is the effective focal length of the third lens and F4 is the effective focal length of the fourth lens.

[0051] In one embodiment, the optical lens can satisfy: (d7×BFL) / (d7+BFL)≥0, where d7 is the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, and BFL is the back focal length of the optical lens.

[0052] In one embodiment, the optical lens may satisfy: 0.001≤|sag6 / sag7|≤1.5, where sag6 is the sagitta of the first side of the sixth lens and sag7 is the sagitta of the second side of the sixth lens.

[0053] In one embodiment, the second surface of the seventh lens is cemented with the first surface of the eighth lens to form the cemented surface of the cemented lens; and the optical lens can satisfy: 0.5≤|R| / (Φ / 2)≤2.5, where R is the radius of curvature of the cemented surface of the cemented lens, and Φ is the effective aperture of the cemented surface of the cemented lens.

[0054] In one embodiment, the optical lens may satisfy: 1.2≤Nd7≤1.65 and 1.6≤Nd8≤2.5, where Nd7 is the refractive index of the seventh lens and Nd8 is the refractive index of the eighth lens.

[0055] In one embodiment, the optical lens may satisfy: 0.8≤|F7 / F8|≤2, where F7 is the effective focal length of the seventh lens and F8 is the effective focal length of the eighth lens.

[0056] In one embodiment, the optical lens may satisfy: |F78 / F|≥3, where F78 is the combined focal length of the seventh and eighth lenses, and F is the total effective focal length of the optical lens.

[0057] In one embodiment, the optical lens may satisfy: F7×F8 / F≤-5, where F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F is the total effective focal length of the optical lens.

[0058] In one embodiment, the optical lens may satisfy: F9 / F≥2, where F9 is the effective focal length of the ninth lens and F is the total effective focal length of the optical lens.

[0059] In another aspect, this application provides an electronic device. This electronic device includes an optical lens according to this application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0060] This application employs nine lenses. By optimizing the shape and optical power of each lens, the optical lens achieves at least one beneficial effect, such as long back focal length, strong thermal stability (e.g., low temperature or high temperature has little impact on lens resolution, wide operating temperature range of the optical lens), large field of view (e.g., FOV can be greater than or equal to 195°), small distortion, large center angular resolution, high light transmission, and high resolution (e.g., 8M). Attached Figure Description

[0061] Other features, objects, and advantages of this utility application will become more apparent from the following detailed description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings:

[0062] Figure 1 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 1 of this application;

[0063] Figure 2 To illustrate the structure of the optical lens according to Embodiment 2 of this application;

[0064] Figure 3 To illustrate the structure of the optical lens according to Embodiment 3 of this application;

[0065] Figure 4 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 4 of this application;

[0066] Figure 5 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 5 of this application;

[0067] Figure 6 To illustrate the structure of the optical lens according to Embodiment 6 of this application;

[0068] Figure 7 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 7 of this application;

[0069] Figure 8 This is a schematic diagram illustrating the structure of the optical lens according to Embodiment 8 of this application;

[0070] Figure 9 To illustrate the structural schematic diagram of the optical lens according to Embodiment 9 of this application; and

[0071] Figure 10 This is a schematic diagram illustrating the structure of an optical lens according to Embodiment 10 of this application. Detailed Implementation

[0072] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of the application and are not intended to limit the scope of the application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0073] 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.

[0074] 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 strictly to scale.

[0075] In this document, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens. The surface of an optical lens closest to the second side is called the second side surface of the optical lens. Exemplarily, the first side can be the object side and the second side can be the image side; or, the first side can be the imaging side and the second side can be the image source side.

[0076] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0077] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0078] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0079] The features, principles and other aspects of this application are described in detail below.

[0080] In an exemplary embodiment, the optical lens includes, for example, nine lenses with optical power, namely 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. These nine lenses are arranged sequentially along the optical axis from the first side to the second side.

[0081] In an exemplary embodiment, the optical lens provided in this application can be used as, for example, an imaging lens. In this case, the first side of the optical lens can be the object side, and the second side can be the image side. Light rays from the object side can be imaged on the image side. When the optical lens can be used as, for example, an imaging lens, the second side surface of the optical lens is the imaging surface of the optical lens.

[0082] In an exemplary embodiment, the optical lens provided in this application can be used as a projection lens and / or a radar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. When the optical lens can be used as a projection lens and / or a radar transmitter lens, the second side surface of the optical lens is the image source surface of the optical lens.

[0083] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on a second side surface of the optical lens. Optionally, the photosensitive element disposed on the second side surface of the optical lens may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0084] For ease of description, the following text primarily focuses on the beneficial effects of using optical lenses as imaging lenses. It should be understood that when optical lenses are used as projection lenses and / or radar transmitter lenses, the beneficial effects can be inferred based on the principle of optical path reversibility.

[0085] In an exemplary embodiment, the first lens may have negative optical power and a convex-concave surface. Designing the first lens as a meniscus with a convex-concave surface allows for the collection of light rays from a large field of view into the rear optical system, effectively increasing light transmission and fixing the direction of large-angle light rays at the edges. The negative optical power of the first lens, coupled with its concave image-side surface, prevents excessive divergence of object-side light rays, which is beneficial for controlling the aperture of the rear lenses. The convex object-side surface of the first lens facilitates the sliding of water droplets in practical environments, such as rain or snow, reducing their impact on imaging. Exemplarily, the first lens may be made of a lens material with high refractive index and high hardness, or it may be an aspherical lens to further improve resolution.

[0086] In an exemplary embodiment, the second lens may have negative optical power and a convex-concave surface. This optical power and surface design of the second lens helps to collect light rays entering through the first lens. Furthermore, designing both the first and second lenses as meniscus lenses with negative optical power, combined with each other, results in smoother outgoing light rays, which is beneficial for achieving low distortion. Since large field-of-view rays emanating from the first lens may enter the object-side surface of the second lens at a relatively small angle of incidence, making the object-side surface of the second lens convex facilitates the smooth arrival of light rays in the rear optical system, thus contributing to a large field of view. Designing the second lens with negative optical power and a convex object-side surface effectively converges light rays, controlling excessive divergence of object-side (front) light rays; combined with a concave image-side surface, the light rays emanating from the second lens are smoother, which further helps control the aperture of the rear lenses.

[0087] In an exemplary embodiment, the third lens may have negative optical power and may be biconcave or convex-concave. Designing the third lens to have negative optical power allows it to collect light rays entering through the second lens, resulting in a smoother light path transition. When the object-side surface of the third lens is designed to be concave, the light rays transmitted from the first lens are diverged after passing through the object-side surface of the second lens, causing the light rays at the rear to converge slowly. This also results in an upward trend in the edge field of view, which helps to move the image point away from the optical axis on the image plane, facilitating matching with large chips and thus obtaining a larger image.

[0088] In an exemplary embodiment, the fourth lens may have positive optical power and may be biconvex or convex-concave. When the fourth lens is designed to have positive optical power and a convex object side, it can effectively converge light rays. At the same time, when combined with a third lens having negative optical power, it facilitates the smooth entry of light rays into the rear lens, thereby improving resolution.

[0089] In an exemplary embodiment, the fifth lens may have positive optical power and may be of a convex-concave or biconvex shape. When the fifth lens has positive optical power and a convex-concave shape, it facilitates the convergence of light from the fourth lens, allowing the light to smoothly transition to the rear, and reduces the height of the incident light, thereby effectively reducing the aperture of the rear lens. Simultaneously, making its image-side concave allows for the convergence of diverging light entering from the object-side of the fifth lens in an upward trend, resulting in smoother light divergence. This facilitates the use of a large chip and achieves a larger image size. When the fifth lens has positive optical power and a biconvex shape, the positive optical power facilitates light convergence; simultaneously, the biconvex shape compresses the angle of the incident light, allowing for a smooth transition and enabling the diverging light to smoothly enter the rear, further smoothing the light path and reducing the aperture of the rear lens.

[0090] In an exemplary embodiment, the sixth lens may have positive optical power and may be biconvex or concave-convex. When the sixth lens has both positive optical power and a biconvex shape, the positive optical power facilitates light convergence; simultaneously, the biconvex shape compresses the angle of the incident light, allowing for a smoother transition and facilitating the smooth entry of diverging light rays into the rear, further smoothing the light path and reducing the aperture of the rear lens. When the sixth lens has both positive optical power and a concave-convex shape, since the object-side surface of the sixth lens is concave and the image-side surface is convex, the light rays exiting the fifth lens can first diverge and then converge, resulting in large-angle edge rays having a lower height on the image-side surface of the sixth lens than on its object-side surface, thereby reducing the rear aperture.

[0091] In an exemplary embodiment, the seventh lens may have positive optical power and may be biconvex. Designing the seventh lens to have positive optical power, in conjunction with the eighth lens to have negative optical power, can facilitate the smooth entry of light into the rear lens, further reduce field curvature, and correct off-axis point aberrations of the system; at the same time, designing the eighth and seventh lenses to have similar focal length ratios allows the imaging lens to maintain stable imaging quality even in high and low temperature environments.

[0092] In an exemplary embodiment, the eighth lens may have negative optical power and may have a concave-convex surface. Designing the eighth lens as a meniscus concave towards the object side and having negative optical power is beneficial for collecting light incident through the seventh lens, allowing for a smooth light transition, and also helps to improve resolution; at the same time, designing the eighth lens and the seventh lens to have a similar focal length ratio allows the imaging lens to maintain stable imaging quality even in high and low temperature environments.

[0093] In an exemplary embodiment, the ninth lens may have positive optical power and a concave-convex surface. Designing the ninth lens as a meniscus concave towards the object side and having negative optical power is beneficial for collecting light incident through the eighth lens, allowing for a smooth transition of light, and also helps improve resolution. Since the object side of the ninth lens is concave and the image side is convex, light rays emanating from the eighth lens can first diverge and then converge, making the height of large-angle edge rays on the image side of the ninth lens lower than its height on the object side, thereby helping to reduce the rear aperture. In addition, designing the image side of the ninth lens as convex makes it less likely for light rays from the imaging plane to return to the imaging plane when projected onto this surface, thereby reducing the energy of ghost images on the imaging plane and thus reducing interference with image quality.

[0094] In an exemplary embodiment, an aperture stop may be provided between the fifth and sixth lenses to limit the light beam and further improve the imaging quality of the optical lens. Placing the aperture stop between the fifth and sixth lenses helps to effectively converge the light entering the optical lens, reduce the lens aperture at the front end of the optical lens, and also helps to reduce the assembly sensitivity of the system. In this embodiment, the aperture stop may be located near the first side of the sixth lens; of course, the aperture stop may also be located near the second side of the fifth lens. However, it should be noted that the positions of the aperture stop disclosed herein are merely examples and not limitations; in alternative embodiments, the aperture stop may be placed at other positions as needed.

[0095] In an exemplary embodiment, the total length (TTL) of the optical lens involved in this application can be the distance along the optical axis from the center of the first side surface of the first lens to the second side surface of the optical lens. The back focal length (BFL) of the optical lens involved in this application can be the distance along the optical axis from the center of the second side surface of the ninth lens to the second side surface of the optical lens.

[0096] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: TTL / H / FOV ≤ 0.1, where TTL is the total length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. More specifically, TTL, H, and FOV can further satisfy: TTL / H / FOV ≤ 0.05. Satisfying TTL / H / FOV ≤ 0.1 is beneficial for achieving lens miniaturization.

[0097] In an exemplary embodiment, the optical lens according to this application satisfies: |(HF×θ) / (F×θ)|≤0.5, where H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, and F is the total effective focal length of the optical lens. More specifically, H, F, and θ further satisfy: |(HF×θ) / (F×θ)|≤0.3. Satisfying |(HF×θ) / (F×θ)|≤0.5 makes the actual image height close to the theoretical image height value, which is beneficial for the imaging lens to have smaller distortion and can highlight the imaging effect of the central area of ​​the lens's imaging plane.

[0098] In an exemplary embodiment, the optical lens according to this application satisfies: 0.1 ≤ |(H / 2) / (F×tan(θ / 2))| ≤ 1.5, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians. More specifically, H, F, and θ further satisfy: 0.15 ≤ |(H / 2) / (F×tan(θ / 2))| ≤ 1.2. Satisfying 0.1 ≤ |(H / 2) / (F×tan(θ / 2))| ≤ 1.5 makes the actual image height closer to the ideal image height, thereby facilitating the achievement of large angular resolution.

[0099] In an exemplary embodiment, the optical lens according to this application can satisfy: BFL / TTL ≥ 0.01, where BFL is the back focal length of the optical lens and TTL is the total length of the optical lens. More specifically, BFL and TTL can further satisfy: BFL / TTL ≥ 0.06. Satisfying BFL / TTL ≥ 0.01 allows for space to be reserved for the installation and focusing operations of optical components, avoiding mechanical interference.

[0100] In an exemplary embodiment, the optical lens according to this application satisfies: (FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, FOV, F, and H can further satisfy: (FOV×F) / H≥51. Satisfying (FOV×F) / H≥50 allows for the simultaneous achievement of telephoto and large field of view characteristics.

[0101] In an exemplary embodiment, the optical lens according to this application satisfies the following condition: F / EPND ≤ 2.5, where F is the total effective focal length of the optical lens and EPND is the entrance pupil diameter of the optical lens. More specifically, F and EPND can further satisfy: F / EPND ≤ 2.3. Satisfying F / EPND ≤ 2.5 is beneficial for increasing light transmission.

[0102] In an exemplary embodiment, the optical lens according to this application satisfies: Nd1 ≥ 1.85, where Nd1 is the refractive index of the first lens. More specifically, Nd1 may further satisfy: Nd1 ≥ 1.9. Satisfying Nd1 ≥ 1.85 is beneficial for reducing the front aperture and improving image quality.

[0103] In an exemplary embodiment, the optical lens according to this application satisfies: |F / R3|+|F / R4|≤1.5, where F is the total effective focal length of the optical lens, R3 is the central radius of curvature of the first side surface of the second lens, and R4 is the central radius of curvature of the second side surface of the second lens. More specifically, F, R3, and R4 further satisfy: |F / R3|+|F / R4|≤1.2, for example, 0.4≤|F / R3|+|F / R4|≤0.9. Satisfying: |F / R3|+|F / R4|≤1.5 can effectively control the two surfaces of the second lens to have a small radius of curvature, making the light rays emitted through the second lens smooth, and can effectively correct astigmatism to improve image quality.

[0104] In an exemplary embodiment, the optical lens according to this application satisfies: -5 ≤ F2 / R4 ≤ -0.01, where F2 is the effective focal length of the second lens and R4 is the central radius of curvature of the second side surface of the second lens. More specifically, F2 and R4 can further satisfy: -3.5 ≤ F2 / R4 ≤ -0.5. Satisfying -5 ≤ F2 / R4 ≤ -0.01 allows for reasonable control of the effective focal length of the second lens and the radius of curvature of its image-side surface. When the image-side surface of the second lens is formed as a concave surface, satisfying -5 ≤ F2 / R4 ≤ -0.01 allows the optical power of the second lens to be negative. This is beneficial for collecting the light entering through the first lens, avoiding excessive divergence of the object-side light, and facilitating control of the aperture of the rear lens. Simultaneously, both the first and second lenses are formed as convex-concave meniscus lenses with negative optical power, which makes the emitted light rays smoother and facilitates the achievement of low distortion.

[0105] In an exemplary embodiment, the optical lens according to this application satisfies: 0.3 ≤ |F3 / F4| ≤ 1.5, where F3 is the effective focal length of the third lens and F4 is the effective focal length of the fourth lens. More specifically, F3 and F4 can further satisfy: 0.45 ≤ |F3 / F4| ≤ 1.2. Satisfying 0.3 ≤ |F3 / F4| ≤ 1.5 allows the third and fourth lenses to have relatively close focal length values, which helps to smooth the light transition and thus improves image quality.

[0106] In an exemplary embodiment, the optical lens according to this application satisfies: (d7×BFL) / (d7+BFL)≥0, where d7 is the distance on the optical axis from the second side of the third lens to the first side of the fourth lens, and BFL is the back focal length of the optical lens. More specifically, d7 and BFL further satisfy: (d7×BFL) / (d7+BFL)≥0.2. Satisfying (d7×BFL) / (d7+BFL)≥0 helps to balance the ratio of the back focal length of the lens to the distance between the third and fourth lenses, which can increase the assembly yield of the lens; at the same time, it can also make the optical lens have sufficient back focal length to place other optical elements, thereby increasing design flexibility.

[0107] In an exemplary embodiment, the optical lens according to this application satisfies: 0.001 ≤ |sag6 / sag7| ≤ 1.5, where sag6 is the sagitta of the first side of the sixth lens, and sag7 is the sagitta of the second side of the sixth lens. More specifically, sag6 and sag7 further satisfy: 0.005 ≤ |sag6 / sag7| ≤ 1.2. Satisfying 0.001 ≤ |sag6 / sag7| ≤ 1.5 allows the object-side and image-side surfaces of the sixth lens to have relatively close sagitta values, which is beneficial for smooth light transition.

[0108] As is known to those skilled in the art, cemented lenses can be used to minimize or eliminate chromatic aberration. The use of cemented lenses in optical lenses can improve image quality, reduce light energy reflection loss, thereby achieving high resolution and enhancing the sharpness of the lens image. Furthermore, the use of cemented lenses can simplify the assembly process in lens manufacturing.

[0109] In an exemplary embodiment, the seventh and eighth lenses can be cemented together to form a cemented lens. Cementing the seventh lens, which has positive optical power and a biconvex shape, with the eighth lens, which has negative optical power and a concave-convex shape, effectively eliminates ghosting effects on the lens, ensuring high resolution while eliminating ghosting. Furthermore, the use of this cemented lens can effectively correct various aberrations of the optical lens, improving resolution and optimizing optical performance such as distortion and CRA while maintaining a compact structure. Additionally, the use of cemented lenses can reduce light loss due to light reflection between the individual lenses of the optical lens. The use of cemented lenses can also reduce the air gap between adjacent lenses, making the lens structure more compact, and reducing tolerance sensitivity issues such as overall eccentricity of the individual lenses during assembly.

[0110] For example, the seventh lens in a cemented lens can have positive optical power, and the eighth lens can have negative optical power. In a cemented lens, the negative lens can have a higher refractive index than the positive lens, thereby effectively and smoothly converging light at the rear of the lens so that the light can reach the image plane smoothly, while also reducing overall weight and cost. In addition, the combination of high and low refractive indices of the lenses in a cemented lens facilitates a rapid transition of light from the front, increases the aperture, and improves light transmission, which is beneficial for night vision requirements.

[0111] In an exemplary embodiment, the optical lens according to this application satisfies: 0.5 ≤ |R| / (Φ / 2) ≤ 2.5, where R is the radius of curvature of the cemented surface of the seventh and eighth lenses, and Φ is the effective aperture of the cemented surface of the seventh and eighth lenses. More specifically, R and Φ further satisfy: 0.8 ≤ |R| / (Φ / 2) ≤ 2.2. Satisfying 0.5 ≤ |R| / (Φ / 2) ≤ 2.5 can effectively control the generation of advanced aberrations (chromatic aberration), thereby improving the light transmission and resolving power of the entire optical lens, and effectively reducing the cementing process requirements when forming the cemented lens.

[0112] In an exemplary embodiment, the optical lens according to this application satisfies: 1.2 ≤ Nd7 ≤ 1.65 and 1.6 ≤ Nd8 ≤ 2.5, where Nd7 is the refractive index of the seventh lens and Nd8 is the refractive index of the eighth lens. More specifically, Nd7 and Nd8 further satisfy: 1.35 ≤ Nd7 ≤ 1.63 and 1.7 ≤ Nd8 ≤ 2.2. Satisfying 1.2 ≤ Nd7 ≤ 1.65 and 1.6 ≤ Nd8 ≤ 2.5 makes the materials of the seventh and eighth lenses easy to process, simplifies the assembly process, and ensures good optical performance.

[0113] In an exemplary embodiment, the optical lens according to this application can satisfy: F6 / F7≥0.01, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens. More specifically, F6 and F7 can further satisfy: F6 / F7≥0.5. Satisfying F6 / F7≥0.01 allows adjacent lenses to have the same focal length, which helps to smooth the light transition and improves image quality.

[0114] In an exemplary embodiment, the optical lens according to this application satisfies: 0.8 ≤ |F7 / F8| ≤ 2, where F7 is the effective focal length of the seventh lens and F8 is the effective focal length of the eighth lens. More specifically, F7 and F8 further satisfy: 0.9 ≤ |F7 / F8| ≤ 1.8. Satisfying 0.8 ≤ |F7 / F8| ≤ 2 allows the two lenses in the cemented lens to have similar focal lengths, which helps to smooth the light transition, is beneficial for correcting chromatic aberration, improves image quality, and can also effectively improve lens thermal compensation.

[0115] In an exemplary embodiment, the optical lens according to this application satisfies: |F78 / F|≥3, where F78 is the combined focal length of the seventh and eighth lenses, and F is the total effective focal length of the optical lens. More specifically, F78 and F may further satisfy: |F78 / F|≥5, for example, 6.5≤|F78 / F|≤13. Satisfying |F78 / F|≥3 allows for a reasonable allocation of the focal lengths of the individual lenses in the cemented lens, which helps to achieve thermal compensation.

[0116] In an exemplary embodiment, the optical lens according to this application satisfies: F7×F8 / F≤-5, where F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F is the total effective focal length of the optical lens. More specifically, F7, F8, and F further satisfy: -25≤F7×F8 / F≤-10. Satisfying F7×F8 / F≤-5 allows for a reasonable allocation of the focal lengths of each lens in the cemented lens, and enables reasonable control of the relationship between the focal length of the cemented lens and the total focal length based on the different material properties of each lens, which is beneficial for correcting chromatic aberration and improving image resolution.

[0117] In an exemplary embodiment, the optical lens according to this application satisfies: F9 / F ≥ 2, where F9 is the effective focal length of the ninth lens and F is the total effective focal length of the optical lens. More specifically, F9 and F may further satisfy: F9 / F ≥ 4. Satisfying F9 / F ≥ 2 allows for a reasonable allocation of the effective focal length of the ninth lens, which helps to achieve thermal compensation and balance various aberrations. Exemplarily, the ninth lens may be a molded glass lens.

[0118] In an exemplary embodiment, the optical lens of this application may, as needed, include a filter and / or protective glass disposed between the ninth lens and the second side surface of the optical lens to filter light of different wavelengths and prevent damage to the second side components (e.g., chips) of the optical lens.

[0119] In an exemplary embodiment, the first through ninth lenses may be spherical or aspherical lenses. According to an exemplary embodiment, at least two of the first through ninth lenses may be aspherical lenses. Exemplarily, the second, sixth, and ninth lenses may be aspherical lenses; while the remaining lenses (i.e., the first, third, fourth, fifth, seventh, and eighth lenses) may be spherical lenses. In particular, the second and sixth lenses may be configured as aspherical lenses, which is beneficial for correcting aberrations in the optical lens and can improve resolving power.

[0120] However, this application does not specifically limit the number of spherical and aspherical lenses. When image quality is the primary focus, the number of aspherical lenses can be increased. Specifically, to improve the resolving quality of the optical system, the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses can all be aspherical lenses. Aspherical lenses are characterized by a continuously changing curvature from the lens center to the periphery. Unlike spherical lenses, which have a constant curvature from the lens center to the periphery, aspherical lenses have better curvature radius characteristics, offering advantages in improving distortion and astigmatism. Using aspherical lenses can eliminate aberrations that occur during imaging as much as possible, thereby improving the lens's image quality. The inclusion of aspherical lenses helps correct system aberrations and improves resolving power.

[0121] The optical lens according to the above embodiments of this application can achieve at least one beneficial effect by reasonably setting the shape and power of each lens, such as long back focal length, strong thermal stability (e.g., low temperature or low temperature has little impact on lens resolution, wide operating temperature range of optical lens, etc.), large field of view (e.g., FOV can be greater than or equal to 195°), small distortion, large center angle resolution, high light transmission, and high resolution (e.g., 8M).

[0122] When this optical lens is used as a projection lens and / or a radar transmitter lens, by rationally setting the shape and effective focal length of each lens, it can achieve improved thermal stability, mainly reflected in the minimal impact of high or low temperatures on the lens's resolution and a wider operating temperature range. It can also effectively improve lens imaging distortion and provide a larger light throughput. This optical lens, while meeting the requirements of a long back focal length, can also achieve lens miniaturization, facilitating assembly in space-constrained applications.

[0123] In an exemplary embodiment, the first, second, third, fourth, fifth, sixth, seventh, eighth, and ninth lenses can all be glass lenses. Optical lenses made of glass can suppress the shift in the back focus of the optical lens due to temperature changes, thereby improving system stability. Simultaneously, using glass avoids lens blurring caused by high and low temperature variations in the operating environment, thus preventing interference with normal lens use. Specifically, when resolution and reliability are paramount, the first to ninth lenses can all be aspherical glass lenses. Of course, in applications with lower temperature stability requirements, the first to ninth lenses in the optical lens can also be made of plastic. Using plastic to make optical lenses can effectively reduce manufacturing costs. Alternatively, the first to ninth lenses in the optical lens can also be made of a combination of plastic and glass.

[0124] However, those skilled in the art will understand that the number of lenses constituting the lens can be varied to obtain the various results and advantages described in this specification 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 desired, the optical lens may also include other numbers of lenses. Specific embodiments of the optical lens applicable to the above embodiments are further described below with reference to the accompanying drawings.

[0125] Example 1

[0126] The following is for reference Figure 1 An optical lens according to Embodiment 1 of this application is described. Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown.

[0127] like Figure 1 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0128] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0129] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0130] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0131] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0132] Table 1 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Embodiment 1. It should be understood that, taking the first lens L1 as an example, the thickness / distance d in the row where S1 is located is the center thickness d1 of the first lens L1, the thickness / distance d in the row where S2 is located is the distance between the first lens L1 and the second lens L2 on the optical axis, and so on.

[0133]

[0134]

[0135] Table 1

[0136] In Example 1, the object-side and image-side surfaces S3, S4, S12, S13, S17, and S18 of the second lens L2, the sixth lens L6, and the ninth lens L9 can all be aspherical surfaces. The surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0137]

[0138] Where x is the distance vector from the vertex of the aspherical surface at a height h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical mirrors S3, S4, S12, S13, S17 and S18 in Example 1.

[0139] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.0729 -4.7276E-04 3.6552E-05 -9.3632E-07 1.0768E-08 -2.4166E-11 -4.4447E-13 7.3456E-15 S4 0.1340 -1.0308E-03 1.8135E-05 2.9110E-06 -2.9196E-07 1.9321E-08 -6.4471E-10 -6.1361E-11 S12 -1.9829 -3.1841E-03 5.0514E-05 -9.1327E-05 1.6051E-05 -4.8238E-07 2.7632E-07 3.2321E-08 S13 -2.5253 -1.9966E-03 1.6261E-04 -5.7950E-05 7.2221E-06 -4.5266E-07 -2.8959E-08 3.1370E-09 S17 5.6129 1.7909E-03 7.8882E-05 -1.7975E-05 1.5329E-06 -3.9837E-08 -7.2239E-10 1.1732E-11 S18 -2.1037 -6.0572E-04 -6.7464E-05 2.3985E-05 -2.4527E-06 1.0143E-07 3.0371E-12 -3.1592E-11

[0140] Table 2

[0141] Example 2

[0142] The following is for reference Figure 2 An optical lens according to Embodiment 2 of this application is described. In this embodiment and the following embodiments, for the sake of brevity, descriptions similar to those in Embodiment 1 will be omitted. Figure 2 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown.

[0143] like Figure 2 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0144] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0145] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0146] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0147] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0148] Table 3 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 2. Table 4 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 2, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0149]

[0150]

[0151] Table 3

[0152] Face number k A4 A6 A8 A10 A12 A14 A16 S3 0.0729 -4.7188E-04 3.6584E-05 -9.3568E-07 1.0780E-08 -2.3920E-11 -4.3869E-13 7.5002E-15 S4 0.1340 -1.0198E-03 1.7921E-05 2.8602E-06 -2.9585E-07 1.9102E-08 -6.5459E-10 -6.1793E-11 S12 -2.2912 -3.2120E-03 4.7600E-05 -8.9837E-05 1.6874E-05 -1.8570E-07 3.6356E-07 5.4629E-08 S13 -2.5372 -1.9923E-03 1.6075E-04 -5.8162E-05 7.2263E-06 -4.4895E-07 -2.8319E-08 3.2188E-09 S17 5.6129 1.7840E-03 7.8319E-05 -1.8022E-05 1.5301E-06 -3.9858E-08 -7.1581E-10 1.1774E-11 S18 -2.10E+00 -5.98E-04 -6.68E-05 2.40E-05 -2.45E-06 1.02E-07 3.05E-11 -2.99E-11

[0153] Table 4

[0154] Example 3

[0155] The following is for reference Figure 3 An optical lens according to Embodiment 3 of this application is described. Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown.

[0156] like Figure 3 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0157] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a biconvex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0158] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0159] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0160] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0161] Table 5 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 3. Table 6 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 3, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0162]

[0163] Table 5

[0164]

[0165]

[0166] Table 6

[0167] Example 4

[0168] The following is for reference Figure 4 An optical lens according to Embodiment 4 of this application is described. Figure 4 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown.

[0169] like Figure 4 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0170] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S7 is convex, and its second side surface S8 is convex. The fifth lens L5 is a biconvex lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is convex. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0171] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0172] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0173] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0174] Table 7 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 4. Table 8 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 4, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0175]

[0176]

[0177] Table 7

[0178] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -1.1034 -4.5553E-04 2.2536E-05 -6.8023E-07 1.5118E-08 -1.0039E-10 -2.6285E-12 4.2967E-14 S4 0.0277 -1.4205E-03 5.1562E-05 -2.1991E-06 -3.5138E-07 2.5075E-08 -1.8910E-10 -4.6970E-11 S12 -0.4097 -2.1234E-03 -5.1746E-05 1.1214E-05 5.5620E-05 -2.7504E-05 -2.1281E-05 2.6297E-06 S13 -0.6617 -2.4723E-03 -1.7672E-03 1.4685E-04 1.4415E-04 -2.7561E-05 -2.9490E-05 6.8693E-06 S17 17.9447 4.7294E-05 9.3683E-04 -3.7149E-05 -8.1058E-06 -1.8264E-06 -4.7883E-07 1.6083E-07 S18 -4.9509 1.1582E-03 6.2579E-04 6.1463E-05 -1.3335E-05 -1.7588E-06 -9.9657E-09 4.4210E-08

[0179] Table 8

[0180] Example 5

[0181] The following is for reference Figure 5 An optical lens according to Embodiment 5 of this application is described. Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown.

[0182] like Figure 5As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0183] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0184] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0185] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0186] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0187] Table 9 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 5. Table 10 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 5, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0188]

[0189]

[0190] Table 9

[0191] Face number k A4 A6 A8 A10 A12 A14 A16 S3 2.7824 -3.2209E-04 3.7320E-05 -1.0312E-06 8.6728E-09 1.1447E-11 2.2888E-12 6.7252E-14 S4 0.3420 -9.4957E-04 2.4173E-05 6.0192E-07 -4.8681E-07 2.6495E-08 9.4000E-10 -2.2269E-10 S12 2.3594 -4.1380E-03 2.2119E-04 -7.8209E-05 2.3654E-05 -5.1415E-06 -1.9903E-06 5.5434E-07 S13 -2.9466 -2.3553E-03 -9.3259E-05 -6.2805E-05 9.6994E-06 1.0518E-07 5.6615E-08 -2.1569E-08 S17 -5.8135 1.9990E-03 1.4890E-04 -1.5022E-06 2.6928E-06 -5.4762E-08 -1.0072E-08 1.9924E-10 S18 -2.1086 -9.8928E-05 2.3265E-06 3.2038E-05 -2.0062E-06 1.1584E-07 1.3804E-09 4.0904E-10

[0192] Table 10

[0193] Example 6

[0194] The following is for reference Figure 6 An optical lens according to Embodiment 6 of this application is described. Figure 6 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown.

[0195] like Figure 6 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0196] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a concave-convex lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is convex. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0197] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0198] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0199] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0200] Table 11 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 6. Table 12 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 6, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0201]

[0202] Table 11

[0203] Face number k A4 A6 A8 A10 A12 A14 A16 S3 2.7824 -3.2209E-04 3.7320E-05 -1.0312E-06 8.6728E-09 1.1447E-11 2.2888E-12 6.7252E-14 S4 0.3420 -9.4957E-04 2.4173E-05 6.0192E-07 -4.8681E-07 2.6495E-08 9.4000E-10 -2.2269E-10 S12 1.3194 -4.1380E-03 2.2119E-04 -7.8209E-05 2.3654E-05 -5.1415E-06 -1.9903E-06 5.5434E-07 S13 -2.3838 -2.3553E-03 -7.6147E-05 -6.2805E-05 9.6994E-06 1.0518E-07 5.6615E-08 -2.1569E-08 S17 -6.3484 1.9990E-03 1.4890E-04 -1.5022E-06 2.6928E-06 -5.4762E-08 -1.0072E-08 1.9924E-10 S18 -2.1086 -1.9786E-04 3.3235E-06 3.2038E-05 -2.0062E-06 1.1584E-07 1.3804E-09 4.0904E-10

[0204] Table 12

[0205] Example 7

[0206] The following is for reference Figure 7 An optical lens according to Embodiment 7 of this application is described. Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown.

[0207] like Figure 7 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0208] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0209] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0210] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0211] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0212] Table 13 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 7. Table 14 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 7, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0213]

[0214] Table 13

[0215] Face number k A4 A6 A8 A10 A12 A14 A16 S3 5.3156 -1.9550E-04 3.3108E-05 -9.4466E-07 1.1139E-08 -2.0293E-11 -5.1253E-13 2.7096E-15 S4 0.3559 -9.3745E-04 2.8686E-05 -4.8199E-06 -5.4359E-07 7.2783E-08 5.5664E-09 -5.8612E-10 S12 0.3595 -4.5108E-03 -1.8829E-04 -1.6928E-04 2.6067E-05 4.1734E-06 8.8499E-07 -5.5331E-07 S13 -2.9853 -2.0127E-03 3.7262E-05 -5.7724E-05 7.8361E-06 -3.3205E-07 -1.8326E-08 1.6194E-09 S17 55.4858 1.2966E-03 8.3905E-05 -1.6821E-05 1.5909E-06 -3.8417E-08 -7.6428E-10 3.5520E-11 S18 -1.6905 -4.5820E-05 1.2046E-06 2.1652E-07 1.9143E-08 1.4823E-09 1.1044E-10 8.1502E-12

[0216] Table 14

[0217] Example 8

[0218] The following is for reference Figure 8 An optical lens according to Embodiment 8 of this application is described. Figure 8 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown.

[0219] like Figure 8 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0220] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a convex-concave lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is concave. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a biconvex lens with positive optical power, its first side surface S12 is convex, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0221] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0222] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0223] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0224] Table 15 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 8. Table 16 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 8, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0225]

[0226]

[0227] Table 15

[0228] Face number k A4 A6 A8 A10 A12 A14 A16 S3 5.3360 -1.9465E-04 3.3218E-05 -9.4363E-07 1.1123E-08 -2.0244E-11 -5.1158E-13 2.6898E-15 S4 0.3709 -7.9438E-04 4.8361E-05 -3.8691E-06 -4.9772E-07 7.2692E-08 5.2108E-09 -6.3384E-10 S12 0.3573 -4.5113E-03 -1.7974E-04 -1.6522E-04 2.7528E-05 4.6178E-06 1.0017E-06 -5.3607E-07 S13 -3.1840 -1.8799E-03 6.3505E-05 -5.4869E-05 7.9375E-06 -3.8616E-07 -2.0199E-08 1.5686E-09 S17 39.4578 1.2988E-03 8.4334E-05 -1.6477E-05 1.6178E-06 -3.8097E-08 -7.5934E-10 3.5751E-11 S18 -3.6645 -7.5049E-04 -7.7226E-05 2.4883E-05 -2.3674E-06 1.0473E-07 2.1214E-11 -6.3463E-11

[0229] Table 16

[0230] Example 9

[0231] The following is for reference Figure 9 An optical lens according to Embodiment 9 of this application is described. Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown.

[0232] like Figure 9As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0233] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a concave-convex lens with positive optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0234] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0235] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0236] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0237] Table 17 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 9. Table 18 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 9, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0238]

[0239]

[0240] Table 17

[0241] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -0.2336 -6.8519E-04 4.2936E-05 -8.8639E-07 6.8520E-09 -1.4690E-10 -7.8063E-13 2.1589E-13 S4 0.2533 -1.4077E-03 2.4123E-05 2.2058E-06 -3.3603E-07 1.3763E-08 -7.2711E-10 -1.7104E-12 S12 126.2640 -1.1297E-03 -4.3679E-04 -1.4210E-04 -4.0970E-05 -1.0261E-05 -1.9547E-06 -7.6742E-08 S13 -2.0115 -2.6193E-03 -6.3102E-04 -2.2038E-06 3.0588E-05 -2.2318E-06 -1.2657E-06 -3.2278E-07 S17 -165.2680 3.9781E-03 9.0112E-05 -2.0017E-05 2.0670E-06 2.7649E-08 -1.7795E-09 -2.6954E-10 S18 -2.8704 -1.7576E-04 -2.5876E-05 2.8739E-05 -2.2567E-06 1.0199E-07 -1.1491E-09 1.4928E-10

[0242] Table 18

[0243] Example 10

[0244] The following is for reference Figure 10 An optical lens according to Embodiment 10 of this application is described. Figure 10 A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown.

[0245] like Figure 10 As shown, the optical lens includes, in sequence from the first side to the second side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, and a ninth lens L9.

[0246] The first lens L1 is a convex-concave lens with negative optical power, its first side surface S1 is convex, and its second side surface S2 is concave. The second lens L2 is a convex-concave lens with negative optical power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 is a biconcave lens with negative optical power, its first side surface S5 is concave, and its second side surface S6 is concave. The fourth lens L4 is a biconvex lens with positive optical power, its first side surface S8 is convex, and its second side surface S9 is convex. The fifth lens L5 is a convex-concave lens with positive optical power, its first side surface S9 is convex, and its second side surface S10 is concave. The sixth lens L6 is a concave-convex lens with positive optical power, its first side surface S12 is concave, and its second side surface S13 is convex. The seventh lens L7 is a biconvex lens with positive optical power, its first side surface S14 is convex, and its second side surface S15 is convex. The eighth lens L8 is a concave-convex lens with negative optical power, its first side surface S15 is concave, and its second side surface S16 is convex. The ninth lens L9 is a concave-convex lens with positive optical power, its first side surface S17 is concave, and its second side surface S18 is convex. The seventh lens L7 and the eighth lens L8 are cemented together to form a cemented lens.

[0247] Optionally, the optical lens may also include a filter L10 having a first side surface S19 and a second side surface S20. The filter L10 can be used to correct color deviation. The optical lens may also include a protective glass L11 having a first side surface S21 and a second side surface S22. The protective glass L11 can be used to protect the image sensor chip IMA located at the second side surface S22.

[0248] The optical lens provided in this application can be used, for example, as an imaging lens, in which light from the object sequentially passes through each surface S1 to S22 and is finally imaged onto an imaging surface disposed on the second side, wherein an image sensor chip IMA is disposed at the imaging surface. It should be understood that the optical lens provided in this application can also be used, for example, as a projection lens and / or a radar transmitter lens, in which case light from the image source side sequentially passes through each surface S22 to S1 and is finally projected onto a projection surface (not shown) disposed on the first side, wherein an image sensor chip IMA is disposed at the image source surface.

[0249] The optical lens may also include an aperture stop STO, which may be positioned between the fifth lens L5 and the sixth lens L6 to improve image quality. For example, the aperture stop STO may be positioned between the fifth lens L5 and the sixth lens L6 near the first side surface S12 of the sixth lens L6.

[0250] Table 19 shows the radius of curvature R, thickness / distance d, refractive index Nd, and Abbe number Vd of each lens in the optical lens of Example 10. Table 20 shows the conic coefficients and higher-order coefficients that can be used for each aspherical mirror in Example 10, wherein each aspherical surface shape can be defined by formula (1) given in Example 1 above.

[0251]

[0252] Table 19

[0253] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -0.1993 -6.8340E-04 4.3114E-05 -8.8214E-07 6.9184E-09 -1.4527E-10 -7.6063E-13 2.1617E-13 S4 0.2545 -1.3872E-03 2.4806E-05 2.2219E-06 -3.3642E-07 1.3772E-08 -7.3430E-10 -1.9603E-12 S12 261.9395 -2.2681E-04 -9.6984E-05 -3.5295E-05 -5.2698E-05 -1.3890E-05 -3.0060E-06 -3.6119E-07 S13 -2.1146 -2.4252E-03 -5.6855E-04 1.4280E-05 3.4280E-05 -1.5387E-06 -1.1702E-06 -3.2166E-07 S17 109.7658 3.9688E-03 8.9895E-05 -2.0142E-05 2.0302E-06 1.9537E-08 -3.3479E-09 -5.5653E-10 S18 -2.9094 -1.7091E-04 -2.6913E-05 2.8638E-05 -2.2648E-06 1.0140E-07 -1.1832E-09 1.4868E-10

[0254] Table 20

[0255] In summary, Examples 1 to 10 satisfy the relationships shown in Tables 21-1 and 21-2 respectively. In Tables 21-1 and 21-2, the units of F, H, TTL, BFL, EPND, R3, R4, d7, F1, F2, F3, F4, F5, F6, F7, F8, F9, F78, sag6, sag7, R, and Φ are millimeters (mm), the unit of FOV is degrees (°), and the unit of θ is radians (rad).

[0256]

[0257]

[0258] Table 21-1

[0259]

[0260]

[0261] Table 21-2

[0262] This application also provides an electronic device that may include an optical lens according to the above embodiments of this application and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The electronic device may be a stand-alone electronic device, such as a rangefinder camera, or an imaging module integrated into a rangefinder device. Furthermore, the electronic device may also be a stand-alone imaging device, such as an in-vehicle camera, or an imaging module integrated into a driver assistance system, such as a driving assistance system.

[0263] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: The first lens has negative optical power, and its first side surface is convex and its second side surface is concave. The second lens has negative optical power, with its first side being convex and its second side being concave. The third lens has negative optical power, and its first side surface is concave. The fourth lens has positive optical power, and its first side surface is convex. The fifth lens has positive optical power, and its first side surface is convex. The sixth lens has positive optical power, and its second side surface is convex. 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, its first side surface is concave, and its second side surface is convex; and The ninth lens has positive optical power, with its first side surface being concave and its second side surface being convex. The optical lens satisfies the following condition: 0.0991≤BFL / TTL≤0.1518, where BFL is the back focal length of the optical lens and TTL is the total length of the optical lens. The optical lens contains nine lenses with optical power.

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

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

4. The optical lens according to claim 1, characterized in that, The second side surface of the fifth lens is either concave or convex.

5. The optical lens according to claim 1, characterized in that, The first side surface of the sixth lens is either concave or convex.

6. The optical lens according to claim 1, characterized in that, The seventh lens and the eighth lens form a cemented lens.

7. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following condition: TTL / H / FOV≤0.05, where H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

8. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: |(HF×θ) / (F×θ)|≤ 0.3, where H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, and F is the total effective focal length of the optical lens.

9. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.1≤|(H / 2) / (F×tan(θ / 2))|≤1.2, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians.

10. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 61.9675≥(FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

11. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following condition: F / EPND≤2.3, where F is the total effective focal length of the optical lens and EPND is the entrance pupil diameter of the optical lens.

12. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 2.0007 ≥ Nd1 ≥ 1.85, where Nd1 is the refractive index of the first lens.

13. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.4≤|F / R3|+|F / R4|≤0.9, where F is the total effective focal length of the optical lens, R3 is the central radius of curvature of the first side surface of the second lens, and R4 is the central radius of curvature of the second side surface of the second lens.

14. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: -3.5≤F2 / R4≤-0.5, where F2 is the effective focal length of the second lens and R4 is the center radius of curvature of the second side surface of the second lens.

15. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.3≤|F3 / F4|≤1.5, where F3 is the effective focal length of the third lens and F4 is the effective focal length of the fourth lens.

16. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.2≤(d7×BFL) / (d7+BFL)≤0.7131, where d7 is the distance on the optical axis from the second side surface of the third lens to the first side surface of the fourth lens.

17. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.001≤|sag6 / sag7|≤1.2, where sag6 is the sagitta of the first side surface of the sixth lens and sag7 is the sagitta of the second side surface of the sixth lens.

18. The optical lens according to claim 6, characterized in that, The second surface of the seventh lens is cemented to the first surface of the eighth lens to form the cemented surface of the cemented lens; and The optical lens satisfies: 0.5≤|R| / (Φ / 2)≤2.5, where R is the radius of curvature of the cemented surface of the cemented lens, and Φ is the effective aperture of the cemented surface of the cemented lens.

19. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following conditions: 1.35≤Nd7≤1.63 and 1.7≤Nd8≤2.2, where Nd7 is the refractive index of the seventh lens and Nd8 is the refractive index of the eighth lens.

20. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following condition: 0.5≤F6 / F7≤1.3386, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens.

21. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 0.9≤|F7 / F8|≤1.8, where F7 is the effective focal length of the seventh lens and F8 is the effective focal length of the eighth lens.

22. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 5≤|F78 / F|≤13, where F78 is the combined focal length of the seventh lens and the eighth lens, and F is the total effective focal length of the optical lens.

23. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies the following condition: -25≤F7×F8 / F≤-5, where F7 is the effective focal length of the seventh lens, F8 is the effective focal length of the eighth lens, and F is the total effective focal length of the optical lens.

24. The optical lens according to any one of claims 1-6, characterized in that, The optical lens satisfies: 18.4532≥F9 / F≥2, where F9 is the effective focal length of the ninth lens and F is the total effective focal length of the optical lens.

25. The optical lens according to claim 1, characterized in that, The optical lens satisfies any one of the following conditions: 0.0208≤TTL / H / FOV≤0.0246, 0.0005≤|(HF×θ) / (F×θ)|≤0.1062, 0.2071≤|(H / 2) / (F×tan(θ / 2))|≤0.2477, 0.0991≤BFL / TTL≤0.1518 51.7978≤(FOV×F) / H≤61.9675 1.8407≤F / EPND≤2.1000 Nd1=2.0007, Nd7=1.4970, Nd8=1.9229, 0.5957≤|F / R3|+|F / R4|≤0.7699, -2.9938≤F2 / R4≤-1.3656, 0.5906≤|F3 / F4|≤1.1250, 0.4129≤(d7×BFL) / (d7+BFL)≤0.7131, 0.0079≤|sag6 / sag7|≤0.7815, 1.0714≤|R| / (Φ / 2)≤2.0475, 0.8215≤F6 / F7≤1.3386 1.3228≤∣F7 / F8|≤1.4788, 7.3648≤|F78 / F|≤11.8809, -24.8725≤F7×F8 / F≤-11.7349, 4.6776≤F9 / F≤18.4532 Wherein, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, F is the total effective focal length of the optical lens, EPND is the entrance pupil diameter of the optical lens, Nd1 is the refractive index of the first lens, Nd7 is the refractive index of the seventh lens, Nd8 is the refractive index of the eighth lens, R3 is the central radius of curvature of the first side surface of the second lens, R4 is the central radius of curvature of the second side surface of the second lens, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and F4 is the fourth lens. The effective focal length of the lens is given by: d7 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis; sag6 is the sag height of the first side surface of the sixth lens; sag7 is the sag height of the second side surface of the sixth lens; the seventh lens and the eighth lens form a cemented lens; R is the radius of curvature of the cementing surface of the cemented lens; Φ is the effective aperture of the cementing surface of the cemented lens; F6 is the effective focal length of the sixth lens; F7 is the effective focal length of the seventh lens; F8 is the effective focal length of the eighth lens; F78 is the combined focal length of the seventh and eighth lenses; and F9 is the effective focal length of the ninth lens.

26. An optical lens, characterized in that, The optical lens comprises, sequentially from the first side to the second side along the optical axis: 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 positive optical power; The sixth lens has positive 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 optical lens satisfies: 0.5≤F6 / F7≤1.3386, where F6 is the effective focal length of the sixth lens and F7 is the effective focal length of the seventh lens; The optical lens contains nine lenses with optical power.

27. The optical lens according to claim 26, characterized in that, The first side of the first lens is convex, and the second side is concave.

28. The optical lens according to claim 26, characterized in that, The first side of the second lens is convex, and the second side is concave.

29. The optical lens according to claim 26, characterized in that, The first side of the third lens is concave, and the second side is either concave or convex.

30. The optical lens according to claim 26, characterized in that, The first side of the fourth lens is convex, and the second side is either concave or convex.

31. The optical lens according to claim 26, characterized in that, The first side of the fifth lens is convex, and the second side is either concave or convex.

32. The optical lens according to claim 26, characterized in that, The first side of the sixth lens is either concave or convex, and the second side is convex.

33. The optical lens according to claim 26, characterized in that, The first side surface of the seventh lens is convex, and the second side surface is convex.

34. The optical lens according to claim 26, characterized in that, The first side of the eighth lens is concave, and the second side is convex.

35. The optical lens according to claim 26, characterized in that, The first side of the ninth lens is concave, and the second side is convex.

36. The optical lens according to claim 26, characterized in that, The seventh lens and the eighth lens form a cemented lens.

37. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following condition: TTL / H / FOV≤0.05, where TTL is the total length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens.

38. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: |(HF×θ) / (F×θ)|≤ 0.3, where H is the image height corresponding to the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, and F is the total effective focal length of the optical lens.

39. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 0.1≤|(H / 2) / (F×tan(θ / 2))|≤1.2, where H is the image height corresponding to the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and θ is the maximum field of view of the optical lens in radians.

40. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following condition: 0.06≤BFL / TTL≤0.1518, where BFL is the back focal length of the optical lens and TTL is the total length of the optical lens.

41. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 61.9675≥(FOV×F) / H≥50, where FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

42. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following condition: F / EPND≤2.3, where F is the total effective focal length of the optical lens and EPND is the entrance pupil diameter of the optical lens.

43. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 2.0007 ≥ Nd1 ≥ 1.85, where Nd1 is the refractive index of the first lens.

44. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 0.4≤|F / R3|+|F / R4|≤0.9, where F is the total effective focal length of the optical lens, R3 is the central radius of curvature of the first side surface of the second lens, and R4 is the central radius of curvature of the second side surface of the second lens.

45. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: -3.5≤F2 / R4≤-0.5, where F2 is the effective focal length of the second lens and R4 is the center radius of curvature of the second side surface of the second lens.

46. ​​The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 0.3≤|F3 / F4|≤1.5, where F3 is the effective focal length of the third lens and F4 is the effective focal length of the fourth lens.

47. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 0.2≤(d7×BFL) / (d7+BFL)≤0.7131, where d7 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, and BFL is the back focal length of the optical lens.

48. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 0.001≤|sag6 / sag7|≤1.2, where sag6 is the sagitta of the first side surface of the sixth lens and sag7 is the sagitta of the second side surface of the sixth lens.

49. The optical lens according to claim 36, characterized in that, The second surface of the seventh lens is cemented to the first surface of the eighth lens to form the cemented surface of the cemented lens; and The optical lens satisfies: 0.5≤|R| / (Φ / 2)≤2.5, where R is the radius of curvature of the cemented surface of the cemented lens, and Φ is the effective aperture of the cemented surface of the cemented lens.

50. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following conditions: 1.35≤Nd7≤1.63 and 1.7≤Nd8≤2.2, where Nd7 is the refractive index of the seventh lens and Nd8 is the refractive index of the eighth lens.

51. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following condition: 0.9≤|F7 / F8|≤1.8, where F8 is the effective focal length of the eighth lens.

52. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 5≤|F78 / F|≤13, where F78 is the combined focal length of the seventh lens and the eighth lens, and F is the total effective focal length of the optical lens.

53. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies the following condition: -25≤F7×F8 / F≤-5, where F8 is the effective focal length of the eighth lens and F is the total effective focal length of the optical lens.

54. The optical lens according to any one of claims 26-36, characterized in that, The optical lens satisfies: 18.4532≥F9 / F≥2, where F9 is the effective focal length of the ninth lens and F is the total effective focal length of the optical lens.

55. The optical lens according to claim 26, characterized in that, The optical lens satisfies any one of the following conditions: 0.0208≤TTL / H / FOV≤0.0246, 0.0005≤|(HF×θ) / (F×θ)|≤0.1062, 0.2071≤|(H / 2) / (F×tan(θ / 2))|≤0.2477, 0.0991≤BFL / TTL≤0.1518 51.7978≤(FOV×F) / H≤61.9675 1.8407≤F / EPND≤2.1000 Nd1=2.0007, Nd7=1.4970, Nd8=1.9229, 0.5957≤|F / R3|+|F / R4|≤0.7699, -2.9938≤F2 / R4≤-1.3656, 0.5906≤|F3 / F4|≤1.1250, 0.4129≤(d7×BFL) / (d7+BFL)≤0.7131, 0.0079≤|sag6 / sag7|≤0.7815, 1.0714≤|R| / (Φ / 2)≤2.0475, 0.8215≤F6 / F7≤1.3386 1.3228≤∣F7 / F8|≤1.4788, 7.3648≤|F78 / F|≤11.8809, -24.8725≤F7×F8 / F≤-11.7349, 4.6776≤F9 / F≤18.4532 Wherein, TTL is the total length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the maximum field of view of the optical lens in radians, F is the total effective focal length of the optical lens, BFL is the back focal length of the optical lens, EPND is the entrance pupil diameter of the optical lens, Nd1 is the refractive index of the first lens, Nd7 is the refractive index of the seventh lens, Nd8 is the refractive index of the eighth lens, R3 is the central radius of curvature of the first side surface of the second lens, R4 is the central radius of curvature of the second side surface of the second lens, and F2 is the second lens... The effective focal lengths are: F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, d7 is the distance from the second side surface of the third lens to the first side surface of the fourth lens on the optical axis, sag6 is the sag of the first side surface of the sixth lens, sag7 is the sag of the second side surface of the sixth lens, the seventh lens and the eighth lens form a cemented lens, R is the radius of curvature of the cementing surface of the cemented lens, Φ is the effective aperture of the cementing surface of the cemented lens, F8 is the effective focal length of the eighth lens, F78 is the combined focal length of the seventh lens and the eighth lens, and F9 is the effective focal length of the ninth lens.

56. An electronic device, characterized in that, It includes an optical lens according to any one of claims 1-55 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images