Optical lenses and electronic equipment

Abstract

The present application discloses an optical lens and an electronic device including the optical lens. The optical lens includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a second lens with positive optical power, whose object side surface is convex; and a third lens with positive optical power, whose object side surface is convex.

Description

Technical Field

[0001] The present application relates to the field of optical elements, and more specifically, to an optical lens and an electronic device. Background Art

[0002] With the continuous development of optical lens technology, optical lenses are being used more and more widely. For example, optical lenses play an irreplaceable role in many fields such as smart phones, security monitoring, car assisted driving, intelligent detection and virtual reality. At the same time, lens manufacturers in various fields are also actively investing in and committed to the research and development and improvement of the performance and technology of optical lenses in order to improve the quality and competitiveness of their products.

[0003] In recent years, the automotive assisted driving system has developed rapidly. As an important tool for obtaining external information in the automotive assisted driving system, automotive optical lenses are increasingly widely used in automobiles, and users have higher and higher requirements for their technology and performance. At present, while people require automotive lenses to have higher imaging performance, they also have more and more demands for miniaturization of automotive lenses. However, in order to improve the imaging quality of the lens, most lens manufacturers usually increase the number of lenses, but the lens structure with more lenses will increase the size and weight of the lens, affecting the miniaturization of the lens.

[0004] In addition, automotive lenses also need to have high stability to adapt to various harsh environments. For example, the actual application environment of automotive lenses may have large temperature differences, and most automotive lenses on the market cannot guarantee clear imaging in high and low temperature environments. Usually, the image plane will shift, making the lens image blurred and affecting normal use. Therefore, high resolution, miniaturization and high stability are the current development trends of automotive lenses. Summary of the invention

[0005] The present application provides an optical lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power, whose object side surface is convex and whose image side surface is concave; a second lens with positive optical power, whose object side surface is convex; and a third lens with positive optical power, whose object side surface is convex.

[0006] In one embodiment, the image-side surface of the second lens is concave.

[0007] In one embodiment, the image-side surface of the second lens is convex.

[0008] In one embodiment, the image-side surface of the third lens is convex.

[0009] In one embodiment, the image-side surface of the third lens is concave.

[0010] In one embodiment, the third lens is an aspherical lens.

[0011] In one embodiment, the optical lens includes an aperture stop located between the first lens and the second lens.

[0012] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: TTL / H / FOV≤0.05.

[0013] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens may satisfy: 0≤R1 / R2≤15.

[0014] In one embodiment, the maximum field of view FOV of the optical lens, the maximum light clearance D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: D / H / FOV≤0.025.

[0015] In one embodiment, a distance BFL from the center of the image side surface of the third lens to the imaging surface of the optical lens on the optical axis and a distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: BFL / TTL≥0.1.

[0016] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens may satisfy: |F2 / F3|≤2.5.

[0017] In one embodiment, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: (FOV×F) / H≥55.

[0018] In one embodiment, a curvature radius R4 of the object-side surface of the second lens and a curvature radius R5 of the image-side surface of the second lens may satisfy: |R4 / R5|≤1.

[0019] In one embodiment, a curvature radius R6 of the object-side surface of the third lens and a curvature radius R7 of the image-side surface of the third lens may satisfy: |R6 / R7|≤1.

[0020] In one embodiment, the spacing distance T12 between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: T12 / TTL≤0.5.

[0021] In one embodiment, the total effective focal length F of the optical lens and the curvature radius R1 of the object-side surface of the first lens may satisfy: |F / R1|≥0.04.

[0022] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens may satisfy: TTL / F≤8.

[0023] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the object-side surface of the second lens may satisfy: -2≤(R2-R4) / (R2+R4)≤1.

[0024] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 2.5≤|F3 / F|≤5.5.

[0025] In one embodiment, the total effective focal length F of the optical lens and the aperture number FNO of the optical lens may satisfy: F / FNO≥0.8.

[0026] In one embodiment, the maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens may satisfy: FOV / H≥30.

[0027] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: |F2 / F|≤5.

[0028] In one embodiment, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and a center thickness T1 of the first lens on the optical axis may satisfy: 3≤R1 / (R2+T1)≤10.

[0029] In one embodiment, the total effective focal length F of the optical lens, the curvature radius R4 of the object-side surface of the second lens, and the curvature radius R5 of the image-side surface of the second lens may satisfy: 0.2≤|F / R4|+|F / R5|≤2.

[0030] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: 1≤|F1 / F|≤5.

[0031] In one embodiment, the curvature radius R2 of the image-side surface of the first lens and the total effective focal length F of the optical lens may satisfy: R2 / F≥0.6.

[0032] In one embodiment, a radius of curvature R6 of the object-side surface of the third lens and an effective focal length F3 of the third lens may satisfy: R6 / F3≤1.1.

[0033] In one embodiment, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the Abbe number V3 of the third lens may satisfy: V1+V2+V3≥85.

[0034] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and the image height H corresponding to the maximum field angle of the optical lens may satisfy: 2.85≤TTL / H≤3.8.

[0035] In one embodiment, the opening angle arctan(1 / K(S2)) of the image side surface of the first lens corresponding to the maximum field angle of the optical lens may satisfy: arctan(1 / K(S2))≥50°.

[0036] In one embodiment, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: 0.15≤H / (F×TTL)≤0.45.

[0037] In one embodiment, the total effective focal length F of the optical lens, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, and the effective focal length F3 of the third lens may satisfy: |F / (F1×F2×F3)|≤0.15.

[0038] In one embodiment, the maximum light clearance aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view angle θ of the optical lens in radians may satisfy: D / H / θ≤0.85.

[0039] On the other hand, the present application provides an optical lens, which includes, in order from the object side to the image side along the optical axis: a first lens with negative optical power; a second lens with positive optical power; and a third lens with positive optical power. The distance BFL from the center of the image side surface of the third lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis can satisfy: BFL / TTL≥0.1.

[0040] In one embodiment, the object-side surface of the first lens is convex, and the image-side surface is concave.

[0041] In one embodiment, the object-side surface of the second lens is convex, and the image-side surface is concave.

[0042] In one embodiment, the object-side surface of the second lens is convex, and the image-side surface is convex.

[0043] In one embodiment, the object-side surface of the third lens is convex, and the image-side surface is convex.

[0044] In one embodiment, the object-side surface of the third lens is convex, and the image-side surface is concave.

[0045] In one embodiment, the third lens is an aspherical lens.

[0046] In one embodiment, the optical lens includes an aperture stop located between the first lens and the second lens.

[0047] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: TTL / H / FOV≤0.05.

[0048] In one embodiment, a curvature radius R1 of the object-side surface of the first lens and a curvature radius R2 of the image-side surface of the first lens may satisfy: 0≤R1 / R2≤15.

[0049] In one embodiment, the maximum field of view FOV of the optical lens, the maximum light clearance D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: D / H / FOV≤0.025.

[0050] In one embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens may satisfy: |F2 / F3|≤2.5.

[0051] In one embodiment, the maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens may satisfy: (FOV×F) / H≥55.

[0052] In one embodiment, a curvature radius R4 of the object-side surface of the second lens and a curvature radius R5 of the image-side surface of the second lens may satisfy: |R4 / R5|≤1.

[0053] In one embodiment, a curvature radius R6 of the object-side surface of the third lens and a curvature radius R7 of the image-side surface of the third lens may satisfy: |R6 / R7|≤1.

[0054] In one embodiment, the spacing distance T12 between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: T12 / TTL≤0.5.

[0055] In one embodiment, the total effective focal length F of the optical lens and the curvature radius R1 of the object-side surface of the first lens may satisfy: |F / R1|≥0.04.

[0056] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens may satisfy: TTL / F≤8.

[0057] In one embodiment, a curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the object-side surface of the second lens may satisfy: -2≤(R2-R4) / (R2+R4)≤1.

[0058] In one embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens may satisfy: 2.5≤|F3 / F|≤5.5.

[0059] In one embodiment, the total effective focal length F of the optical lens and the aperture number FNO of the optical lens may satisfy: F / FNO≥0.8.

[0060] In one embodiment, the maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens may satisfy: FOV / H≥30.

[0061] In one embodiment, the effective focal length F2 of the second lens and the total effective focal length F of the optical lens may satisfy: |F2 / F|≤5.

[0062] In one embodiment, a curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and a center thickness T1 of the first lens on the optical axis may satisfy: 3≤R1 / (R2+T1)≤10.

[0063] In one embodiment, the total effective focal length F of the optical lens, the curvature radius R4 of the object-side surface of the second lens, and the curvature radius R5 of the image-side surface of the second lens may satisfy: 0.2≤|F / R4|+|F / R5|≤2.

[0064] In one embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens may satisfy: 1≤|F1 / F|≤5.

[0065] In one embodiment, the curvature radius R2 of the image-side surface of the first lens and the total effective focal length F of the optical lens may satisfy: R2 / F≥0.6.

[0066] In one embodiment, a radius of curvature R6 of the object-side surface of the third lens and an effective focal length F3 of the third lens may satisfy: R6 / F3≤1.1.

[0067] In one embodiment, the Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the Abbe number V3 of the third lens may satisfy: V1+V2+V3≥85.

[0068] In one embodiment, the distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and the image height H corresponding to the maximum field angle of the optical lens may satisfy: 2.85≤TTL / H≤3.8.

[0069] In one embodiment, the opening angle arctan(1 / K(S2)) of the image side surface of the first lens corresponding to the maximum field angle of the optical lens may satisfy: arctan(1 / K(S2))≥50°.

[0070] In one embodiment, the image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis may satisfy: 0.15≤H / (F×TTL)≤0.45.

[0071] In one embodiment, the total effective focal length F of the optical lens, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens, and the effective focal length F3 of the third lens may satisfy: |F / (F1×F2×F3)|≤0.15.

[0072] In one embodiment, the maximum light clearance aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view angle θ of the optical lens in radians may satisfy: D / H / θ≤0.85.

[0073] Another aspect of the present application provides an electronic device, which includes the optical lens provided by the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0074] The present application adopts three lenses, and by optimizing the shape, optical focal length, etc. of each lens, the optical lens has at least one beneficial effect of miniaturization, high resolution, back focal length, good temperature performance, low cost, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Other features, purposes and advantages of the present utility model will become more apparent through the detailed description of the following embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0076] Figure 1 A schematic diagram showing the structure of an optical lens according to Embodiment 1 of the present application;

[0077] Figure 2 A schematic diagram showing the structure of an optical lens according to Embodiment 2 of the present application;

[0078] Figure 3 A schematic diagram showing the structure of an optical lens according to Embodiment 3 of the present application;

[0079] Figure 4 A schematic diagram showing the structure of an optical lens according to Embodiment 4 of the present application;

[0080] Figure 5 A schematic diagram showing the structure of an optical lens according to Embodiment 5 of the present application;

[0081] Figure 6 A schematic diagram showing the structure of an optical lens according to Embodiment 6 of the present application;

[0082] Figure 7 A schematic diagram showing the structure of an optical lens according to Embodiment 7 of the present application; and

[0083] Figure 8 A schematic diagram showing the structure of an optical lens according to Example 8 of the present application. DETAILED DESCRIPTION

[0084] In order to facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numbers refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0085] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0086] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0087] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object side of the lens, and the surface of each lens closest to the imaging side is called the image side of the lens.

[0088] It should also be understood that the terms "comprises", "including", "having", "includes" 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. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0089] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0090] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0091] The features, principles and other aspects of the present application are described in detail below.

[0092] In an exemplary embodiment, the optical lens includes, for example, three lenses having optical power, namely, a first lens, a second lens, and a third lens, which are arranged in sequence from the object side to the image side along the optical axis.

[0093] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the imaging surface. Optionally, the photosensitive element disposed on the imaging surface may be a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0094] In an exemplary embodiment, the first lens may have a negative optical power. The first lens may have a convex-concave surface. The first lens is set to a meniscus shape facing the object side, which can diverge light, which is conducive to allowing the light to enter the rear optical lens accurately and smoothly, improve the lens resolution, and is conducive to collecting as much large-field light as possible to enter the rear optical system, increase the light throughput of the lens, and improve the illumination. In practical applications, considering that the vehicle-mounted lens is installed and used outdoors, it may be in bad weather such as rain and snow. This optical power and surface setting of the first lens is conducive to the sliding of water droplets and helps to reduce the impact on imaging.

[0095] In an exemplary embodiment, the second lens may have a positive optical power. The second lens may have a convex-convex surface type or a convex-concave surface type. Such an optical power and surface type setting of the second lens is conducive to collecting and converging light, making the light trend transition smoothly and smoothly entering the rear optical system, which is conducive to collecting as much light of a large field of view as possible, increasing the light throughput of the lens, and improving the illumination. At the same time, it is conducive to compensating for the spherical aberration introduced by the front lens, and can further correct the aberration generated by the front lens. It can also increase the aperture of the lens, shorten the total length of the lens, make the optical system more compact, and make the optical lens have a relatively short total length of the lens.

[0096] In an exemplary embodiment, the third lens may have positive optical power. The third lens may have a convex-convex surface type or a convex-concave surface type. Such an optical power and surface type setting of the third lens is conducive to the smooth entry of light into the image plane, improving the resolution, and at the same time making the various aberrations of the optical system fully corrected, and under the premise of a compact structure, the resolution can be improved, and the optical performance such as distortion and CRA can be optimized. Preferably, the third lens may have an aspherical mirror surface, which can further improve the resolution.

[0097] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / H / FOV≤0.05, wherein TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, TTL, H, and FOV may further satisfy: TTL / H / FOV≤0.04. When TTL / H / FOV≤0.05 is satisfied, the length of the lens can be effectively limited under the same imaging surface and the same image height, which is conducive to miniaturization of the lens.

[0098] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0≤R1 / R2≤15, wherein R1 is the radius of curvature of the object side of the first lens, and R2 is the radius of curvature of the image side of the first lens. More specifically, R1 and R2 may further satisfy: 1≤R1 / R2≤13. Satisfying 0≤R1 / R2≤15 can make the lens shape more reasonable, collect light at a larger angle to enter the rear optical system, and reduce the diameter of the front port of the lens and the volume, which is conducive to improving the resolution while achieving miniaturization.

[0099] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / FOV≤0.025, wherein FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, D, H, and FOV may further satisfy: D / H / FOV≤0.02. Satisfying D / H / FOV≤0.025 is conducive to reducing the diameter of the front port of the lens and is conducive to miniaturization.

[0100] In an exemplary embodiment, the optical lens according to the present application may satisfy: BFL / TTL≥0.1, wherein BFL is the distance from the center of the image side surface of the third lens to the imaging surface of the optical lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, BFL and TTL may further satisfy: BFL / TTL≥0.12. Satisfying BFL / TTL≥0.1 can enable the lens to have a long back focal length while achieving miniaturization, which is beneficial to the assembly of the module.

[0101] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F2 / F3|≤2.5, where F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens. More specifically, F2 and F3 may further satisfy: |F2 / F3|≤2. Satisfying |F2 / F3|≤2.5 may help smooth the transition of light, correct chromatic aberration, improve image quality, and effectively improve lens thermal compensation.

[0102] In an exemplary embodiment, the optical lens according to the present application may satisfy: (FOV×F) / H≥55, 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 may further satisfy: (FOV×F) / H≥60. Satisfying (FOV×F) / H≥55 allows the lens to satisfy a large field of view.

[0103] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R4 / R5|≤1, where R4 is the radius of curvature of the object side of the second lens, and R5 is the radius of curvature of the image side of the second lens. More specifically, R4 and R5 may further satisfy: |R4 / R5|≤0.8. Satisfying |R4 / R5|≤1 may help the second lens collect more light and increase the light transmission capacity of the system.

[0104] In an exemplary embodiment, the optical lens according to the present application may satisfy: |R6 / R7|≤1, wherein R6 is the radius of curvature of the object side of the third lens, and R7 is the radius of curvature of the image side of the third lens. More specifically, R6 and R7 may further satisfy: |R6 / R7|≤0.8. When |R6 / R7|≤1 is satisfied, the light collected by the second lens may be compressed, so that the light trend is relatively smooth, thereby making the light smoothly transition to the rear, and can effectively reduce system aberrations, improve system imaging quality, and facilitate obtaining high-quality, bright images.

[0105] In an exemplary embodiment, the optical lens according to the present application may satisfy: T12 / TTL≤0.5, wherein T12 is the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, and TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, T12 and TTL may further satisfy: T12 / TTL≤0.4. Satisfying T12 / TTL≤0.5 can make the light near the aperture transition smoothly, which is conducive to improving image quality.

[0106] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F / R1|≥0.04, where F is the total effective focal length of the optical lens, and R1 is the radius of curvature of the object side of the first lens. More specifically, F and R1 may further satisfy: |F / R1|≥0.05. Satisfying |F / R1|≥0.04 may help to make the refraction angle of the incident light change more moderate, avoid excessive refraction changes and excessive aberrations, and facilitate the production of the first lens, while reducing tolerance sensitivity.

[0107] In an exemplary embodiment, the optical lens according to the present application may satisfy: TTL / F≤8, wherein TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the total effective focal length of the optical lens. More specifically, TTL and F may further satisfy: TTL / F≤7.7. Satisfying TTL / F≤8 can effectively limit the length of the lens and realize miniaturization of the lens.

[0108] In an exemplary embodiment, the optical lens according to the present application may satisfy: -2≤(R2-R4) / (R2+R4)≤1, wherein R2 is the radius of curvature of the image side surface of the first lens, and R4 is the radius of curvature of the object side surface of the second lens. More specifically, R2 and R4 may further satisfy: -1≤(R2-R4) / (R2+R4)≤0.5. Satisfying -2≤(R2-R4) / (R2+R4)≤1 can correct the aberration of the optical system and ensure that when the light emitted from the first lens is incident on the first surface of the second lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical system.

[0109] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.5≤|F3 / F|≤5.5, where F3 is the effective focal length of the third lens, and F is the total effective focal length of the optical lens. More specifically, F3 and F may further satisfy: 2.55≤|F3 / F|≤4.5. Satisfying 2.5≤|F3 / F|≤5.5 may help collect light and ensure the light throughput of the system.

[0110] In an exemplary embodiment, the optical lens according to the present application may satisfy: F / FNO ≥ 0.8, where F is the total effective focal length of the optical lens, and FNO is the aperture number of the optical lens. More specifically, F and FNO may further satisfy: F / FNO ≥ 0.9. Satisfying F / FNO ≥ 0.8 is conducive to making the lens have a large aperture.

[0111] In an exemplary embodiment, the optical lens according to the present application may satisfy: FOV / H ≥ 30, where FOV is the maximum field of view of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. More specifically, FOV and H may further satisfy: FOV / H ≥ 32. Satisfying FOV / H ≥ 30 is conducive to making the lens have a large field of view.

[0112] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F2 / F|≤5, where F2 is the effective focal length of the second lens, and F is the total effective focal length of the optical lens. More specifically, F2 and F may further satisfy: |F2 / F|≤4. Satisfying |F2 / F|≤5 helps to achieve thermal compensation, so that the lens can obtain better quality under high and low temperature conditions.

[0113] In an exemplary embodiment, the optical lens according to the present application may satisfy: 3≤R1 / (R2+T1)≤10, wherein R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, and T1 is the center thickness of the first lens on the optical axis. More specifically, R1, R2, and T1 may further satisfy: 4≤R1 / (R2+T1)≤9. Satisfying 3≤R1 / (R2+T1)≤10 can make the peripheral light and the central light have an optical path difference, diverge the central light, enter the rear optical system, and reduce the diameter of the front port of the lens, reduce the volume, and facilitate miniaturization of the lens and cost reduction.

[0114] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.2≤|F / R4|+|F / R5|≤2, wherein F is the total effective focal length of the optical lens, R4 is the radius of curvature of the object side of the second lens, and R5 is the radius of curvature of the image side of the second lens. More specifically, F, R4, and R5 may further satisfy: 0.2≤|F / R4|+|F / R5|≤1.5. Satisfying 0.2≤|F / R4|+|F / R5|≤2 can assist the incident light to enter the optical photography system lens group and effectively correct the astigmatism, which is beneficial to improving the imaging quality.

[0115] In an exemplary embodiment, the optical lens according to the present application may satisfy: 1≤|F1 / F|≤5, where F1 is the effective focal length of the first lens and F is the total effective focal length of the optical lens. More specifically, F1 and F may further satisfy: 1.2≤|F1 / F|≤5. Satisfying 1≤|F1 / F|≤5 may help improve resolution.

[0116] In an exemplary embodiment, the optical lens according to the present application may satisfy: R2 / F≥0.6, where R2 is the radius of curvature of the image side surface of the first lens, and F is the total effective focal length of the optical lens. More specifically, R2 and F may further satisfy: R2 / F≥0.8. Satisfying R2 / F≥0.6 may be beneficial to correcting aberrations.

[0117] In an exemplary embodiment, the optical lens according to the present application may satisfy: R6 / F3≤1.1, where R6 is the radius of curvature of the object side of the third lens, and F3 is the effective focal length of the third lens. More specifically, R6 and F3 may further satisfy: R6 / F3≤1. Satisfying R6 / F3≤1.1 may help further ensure imaging quality.

[0118] In an exemplary embodiment, the optical lens according to the present application may satisfy: V1+V2+V3≥85, wherein V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V3 is the Abbe number of the third lens. More specifically, V1, V2, and V3 may further satisfy: V1+V2+V3≥90. Satisfying V1+V2+V3≥85 may be beneficial to further correct the aberration of the optical system.

[0119] In an exemplary embodiment, the optical lens according to the present application may satisfy: 2.85≤TTL / H≤3.8, wherein TTL is the distance from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and H is the image height corresponding to the maximum field angle of the optical lens. More specifically, TTL and H may further satisfy: 2.85≤TTL / H≤3.5. Satisfying 2.85≤TTL / H≤3.8 can effectively compress the total optical length of the lens assembly, which is conducive to the miniaturization design of the lens.

[0120] In an exemplary embodiment, the optical lens according to the present application may satisfy: arctan(1 / K(S2))≥50°, wherein arctan(1 / K(S2)) is the opening angle of the image side of the first lens corresponding to the maximum field angle of the optical lens. More specifically, arctan(1 / K(S2)) may further satisfy: arctan(1 / K(S2))≥52°. Satisfying arctan(1 / K(S2))≥50° may facilitate rapid focusing of large-angle peripheral light entering through the first lens, thereby improving imaging quality.

[0121] In an exemplary embodiment, the optical lens according to the present application may satisfy: 0.15≤H / (F×TTL)≤0.45, wherein H is the image height corresponding to the maximum field angle of the optical lens, F is the total effective focal length of the optical lens, and TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis. More specifically, H, F, and TTL may further satisfy: 0.18≤H / (F×TTL)≤0.40. Satisfying 0.15≤H / (F×TTL)≤0.45 can effectively compress the total optical length of the lens assembly, which is conducive to the miniaturization of the lens.

[0122] In an exemplary embodiment, the optical lens according to the present application may satisfy: |F / (F1×F2×F3)|≤0.15, where F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, and F3 is the effective focal length of the third lens. More specifically, F, F1, F2, and F3 may further satisfy: |F / (F1×F2×F3)|≤0.1. Satisfying |F / (F1×F2×F3)|≤0.15 can balance the refractive power configuration of the lens to effectively correct the aberration of the lens while reducing the sensitivity of the thin optical lens.

[0123] In an exemplary embodiment, the optical lens according to the present application may satisfy: D / H / θ≤0.85, wherein D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians. More specifically, D, H, and θ may further satisfy: D / H / θ≤0.8. Satisfying D / H / θ≤0.85 is conducive to reducing the diameter of the front port of the lens and facilitating miniaturization of the lens.

[0124] In an exemplary embodiment, an aperture for limiting the light beam may be provided between the first lens and the second lens to further improve the imaging quality of the optical lens. Setting the aperture between the first lens and the second lens is conducive to converging the front and rear light rays, shortening the total length of the system, and reducing the size of the lens at the rear end of the aperture of the system. In the embodiment of the present application, the aperture may be provided near the image side of the first lens, or near the object side of the second lens. However, it should be noted that the position of the aperture disclosed here is only an example and not a limitation; in alternative embodiments, the aperture may also be provided at other positions according to actual needs.

[0125] In an exemplary embodiment, as needed, the optical lens of the present application may further include a filter and / or a protective glass disposed between the third lens and the imaging plane to filter light with different wavelengths and prevent damage to the image-side element (e.g., chip) of the optical lens.

[0126] In an exemplary embodiment, the first lens and the second lens may be spherical lenses; the third lens may be an aspherical lens. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When focusing on imaging quality, the number of aspherical lenses can be increased. In particular, in order to improve the resolution quality of the optical system, the first lens, the second lens and the third lens may all be aspherical lenses. The characteristic of an aspherical lens is that the curvature changes continuously from the center of the lens to the periphery. Unlike a spherical lens with a constant curvature from the center of the lens to the periphery, an aspherical lens has a better curvature radius characteristic, and has the advantages of improving distortion aberration and improving astigmatism aberration. After adopting an aspherical lens, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality of the lens. The setting of an aspherical lens helps to correct system aberrations and improve resolution.

[0127] According to the optical lens of the above-mentioned embodiment of the present application, the optical lens has at least one beneficial effect of high resolution (million pixels), miniaturization, good temperature performance, large field of view, long back focus, low cost and good imaging quality through the reasonable setting of each lens shape and optical focal length. The optical lens adopts a three-piece separation structure, which allows the lens to have more degrees of freedom, which is conducive to achieving high resolution of large-angle lenses. The optical lens has good control over the back focus offset of the lens at high and low temperatures through reasonable material selection and matching and reasonable setting of the lens focal length, has good temperature performance, and is conducive to meeting more stringent use environments. The optical lens is conducive to miniaturization of the lens while meeting high resolution, and has a long back focus for easy installation.

[0128] In an exemplary embodiment, the first lens, the second lens, and the third lens may all be glass lenses. An optical lens made of glass can suppress the deviation of the back focus of the optical lens with temperature changes to improve system stability. At the same time, the use of glass material can avoid lens imaging blur caused by high and low temperature changes in the use environment, which affects the normal use of the lens. Specifically, when focusing on resolution quality and reliability, the first lens to the third lens may all be glass aspherical lenses. Of course, in applications where temperature stability requirements are lower, the first lens to the third lens in the optical lens may also be made of plastic. Making optical lenses with plastic can effectively reduce production costs. Of course, the first lens to the third lens in the optical lens may also be made of a combination of plastic and glass.

[0129] However, it should be understood by those skilled in the art that, without departing from the technical solution claimed in the present application, the number of lenses constituting the lens can be changed to obtain the various results and advantages described in this specification. For example, although three lenses are described as an example in the embodiments, the optical lens is not limited to including three lenses. If necessary, the optical lens may also include other numbers of lenses. The following further describes specific embodiments of the optical lens applicable to the above-mentioned embodiments with reference to the accompanying drawings.

[0130] Example 1

[0131] The following reference Figure 1 An optical lens according to Embodiment 1 of the present application is described. Figure 1 A schematic structural diagram of an optical lens according to Example 1 of the present application is shown.

[0132] like Figure 1 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0133] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a biconvex lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is convex. The third lens L3 is a biconvex lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is convex.

[0134] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0135] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0136] Table 1 shows the radius of curvature R, thickness / distance T (it should be understood that the thickness / distance T of the row where S1 is located is the center thickness T1 of the first lens L1, the thickness / distance T of the row where S2 is located is the spacing distance T12 between the first lens L1 and the second lens L2, and so on), refractive index Nd, and Abbe number Vd of each lens of the optical lens of Example 1.

[0137]

[0138]

[0139] Table 1

[0140] In Embodiment 1, both the object-side surface S6 and the image-side surface S7 of the third lens L3 may be aspherical surfaces, and the surface shape x of each aspherical lens may be defined by, but not limited to, the following aspherical surface formula:

[0141]

[0142] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the cone coefficient k and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspheric mirror surface S6 and S7 in Example 1.

[0143] Face number k A4 A6 A8 A10 A12 A14 A16 S6 0.1707 -3.9599E-04 -8.7917E-04 -2.3055E-04 1.4715E-04 -1.9012E-05 -3.6036E-06 6.3134E-07 S7 -115.7234 1.1185E-02 2.1040E-04 -4.8161E-04 8.3553E-05 3.3914E-05 -1.5285E-05 1.7486E-06

[0144] Table 2

[0145] Example 2

[0146] The following reference Figure 2 The optical lens according to Embodiment 2 of the present application is described. In this embodiment and the following embodiments, for the sake of brevity, some descriptions similar to Embodiment 1 will be omitted. Figure 2 A schematic structural diagram of an optical lens according to Embodiment 2 of the present application is shown.

[0147] like Figure 2 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0148] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a biconvex lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is convex. The third lens L3 is a biconvex lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is convex.

[0149] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0150] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0151] Table 3 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 2. Table 4 shows the cone coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 2, wherein each aspheric surface shape can be defined by formula (1) given in the above-mentioned Example 1.

[0152]

[0153] Table 3

[0154] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -0.0511 -9.0358E-04 -8.0756E-04 -2.8092E-04 1.4829E-04 -1.9122E-05 -4.9153E-06 7.9901E-07 S7 210.1336 1.3938E-02 -4.1621E-05 -4.2994E-04 1.6234E-04 3.7265E-05 -2.7180E-05 3.7372E-06

[0155] Table 4

[0156] Example 3

[0157] The following reference Figure 3 An optical lens according to Example 3 of the present application is described. Figure 3 A schematic structural diagram of an optical lens according to Example 3 of the present application is shown.

[0158] like Figure 3 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0159] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a biconvex lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is convex. The third lens L3 is a convex-concave lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is concave.

[0160] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0161] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0162] Table 5 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 3. Table 6 shows the cone coefficient and high-order coefficient that can be used for each aspheric mirror surface in Example 3, wherein each aspheric surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0163]

[0164]

[0165] Table 5

[0166] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -0.6781 -3.7521E-04 -3.7387E-04 -3.0663E-04 1.4297E-04 -2.1996E-05 -5.7928E-06 1.0522E-06 S7 210.1336 1.6064E-02 -1.7753E-04 -4.7233E-04 2.5310E-04 2.1299E-05 -5.3957E-05 8.6389E-06

[0167] Table 6

[0168] Example 4

[0169] The following reference Figure 4 An optical lens according to Example 4 of the present application is described. Figure 4 A schematic structural diagram of an optical lens according to Example 4 of the present application is shown.

[0170] like Figure 4 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0171] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a biconvex lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is convex. The third lens L3 is a convex-concave lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is concave.

[0172] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0173] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

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

[0175]

[0176]

[0177] Table 7

[0178] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -0.7001 -4.5406E-04 -4.7001E-04 -3.6577E-04 1.3331E-04 -2.0100E-05 -5.6011E-06 9.1390E-07 S7 210.1336 1.6683E-02 -2.7263E-04 -4.7766E-04 2.8451E-04 2.2885E-05 -4.7698E-05 8.2804E-06

[0179] Table 8

[0180] Example 5

[0181] The following reference Figure 5 An optical lens according to Example 5 of the present application is described. Figure 5 A schematic structural diagram of an optical lens according to Example 5 of the present application is shown.

[0182] like Figure 5 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0183] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is concave. The third lens L3 is a biconvex lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is convex.

[0184] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0185] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0186] Table 9 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 5. Table 10 shows the cone coefficient and high-order coefficient that can be used for each aspherical mirror surface in Example 5, wherein each aspherical surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0187]

[0188] Table 9

[0189] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -0.7990 -1.5522E-03 -6.9689E-04 -2.8704E-04 1.1802E-04 -3.5020E-05 -1.0684E-05 2.0642E-06 S7 -209.6234 1.0133E-02 2.6271E-03 -1.9424E-04 1.9913E-05 -2.6657E-05 -1.5222E-05 6.5868E-06

[0190] Table 10

[0191] Example 6

[0192] The following reference Figure 6 An optical lens according to Example 6 of the present application is described. Figure 6 A schematic structural diagram of an optical lens according to Example 6 of the present application is shown.

[0193] like Figure 6 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0194] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is concave. The third lens L3 is a biconvex lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is convex.

[0195] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0196] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0197] Table 11 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 6. Table 12 shows the conic coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 6, wherein each aspheric surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0198]

[0199] Table 11

[0200]

[0201]

[0202] Table 12

[0203] Example 7

[0204] The following reference Figure 7 An optical lens according to Example 7 of the present application is described. Figure 7 A schematic structural diagram of an optical lens according to Example 7 of the present application is shown.

[0205] like Figure 7 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0206] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is concave. The third lens L3 is a convex-concave lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is concave.

[0207] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0208] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0209] Table 13 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 7. Table 14 shows the cone coefficient and high-order coefficient of each aspheric mirror surface that can be used in Example 7, wherein each aspheric surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0210]

[0211] Table 13

[0212] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -1.1315 9.4285E-04 -1.3830E-03 -6.9689E-04 3.9294E-06 -1.0875E-05 3.0618E-06 -4.0843E-06 S7 200.0379 2.3376E-02 4.3919E-04 -1.2157E-03 -1.0410E-05 7.6346E-05 -3.4750E-05 7.7131E-06

[0213] Table 14

[0214] Example 8

[0215] The following reference Figure 8 An optical lens according to Example 8 of the present application is described. Figure 8 A schematic structural diagram of an optical lens according to Example 8 of the present application is shown.

[0216] like Figure 8 As shown, the optical lens includes a first lens L1, a second lens L2 and a third lens L3 in sequence from the object side to the image side along the optical axis.

[0217] The first lens L1 is a convex-concave lens with negative power, whose object side surface S1 is convex and whose image side surface S2 is concave. The second lens L2 is a convex-concave lens with positive power, whose object side surface S4 is convex and whose image side surface S5 is concave. The third lens L3 is a convex-concave lens with positive power, whose object side surface S6 is convex and whose image side surface S7 is concave.

[0218] The optical lens may further include a stop STO, which may be disposed between the first lens L1 and the second lens L2 to improve imaging quality. For example, the stop STO may be disposed between the first lens L1 and the second lens L2 at a position close to the object side surface S4 of the second lens L2.

[0219] Optionally, the optical lens may further include a filter L4 and / or a protective glass L4′ having an object side surface S8 and an image side surface S9. The filter L4 and / or the protective glass L4′ may be used to correct color deviation and / or protect the image sensor chip IMA located at the imaging surface. Light from the object sequentially passes through each surface S1 to S9 and is finally imaged on the imaging surface.

[0220] Table 15 shows the radius of curvature R, thickness / distance T, refractive index Nd and Abbe number Vd of each lens of the optical lens of Example 8. Table 16 shows the cone coefficient and high-order coefficient that can be used for each aspheric mirror surface in Example 8, wherein each aspheric surface shape can be defined by the formula (1) given in the above-mentioned Example 1.

[0221]

[0222] Table 15

[0223] Face number k A4 A6 A8 A10 A12 A14 A16 S6 -0.8894 1.8114E-03 -1.3233E-03 -6.4657E-04 -1.2073E-05 -1.5228E-05 3.0693E-06 -3.5484E-06 S7 159.8132 2.4034E-02 7.5590E-04 -1.3422E-03 -7.5737E-05 3.8109E-05 -4.2214E-05 8.4265E-06

[0224] Table 16

[0225] In summary, Examples 1 to 8 respectively satisfy the relationships shown in Table 17-1 and Table 17-2 below. In Table 17-1 and Table 17-2, the units of D, H, F, BFL, TTL, T12, T1, F1, F2, and F3 are millimeters (mm), and the unit of FOV is degrees (°).

[0226]

[0227]

[0228]

[0229] Table 17-1

[0230]

[0231]

[0232] Table 17-2

[0233] The present application also provides an electronic device, which may include an optical lens according to the above-mentioned embodiment of the present application and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The electronic device may be an independent electronic device such as a detection distance camera, or an imaging module integrated in a device such as a detection distance device. In addition, the electronic device may also be an independent imaging device such as a vehicle-mounted camera, or an imaging module integrated in a driving assistance system such as a vehicle-mounted camera.

[0234] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical lens, characterized in that: The optical lens includes, in order from the object side to the image side along the optical axis: The first lens has a negative optical power, and its object side surface is convex and its image side surface is concave; a second lens having positive optical power and a convex object-side surface; and The third lens has positive power and its object side surface is convex; The curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1≤R1 / R2≤15; The maximum field of view FOV of the optical lens, the maximum clear aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following conditions: D / H / FOV≤0.025; The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: TTL / F≤8; The total effective focal length F of the optical lens and the aperture number FNO of the optical lens satisfy: F / FNO≥0.8; The number of lenses having optical power in the optical lens is three.

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

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

4. The optical lens according to claim 1, characterized in that: The image side surface of the third lens is a convex surface.

5. The optical lens according to claim 1, characterized in that: The image side surface of the third lens is a concave surface.

6. The optical lens according to claim 1, characterized in that: The third lens is an aspherical lens.

7. The optical lens according to claim 1, characterized in that: The optical lens comprises an aperture stop, and the aperture stop is located between the first lens and the second lens.

8. The optical lens according to any one of claims 1 to 7, characterized in that: The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV≤0.

05.

9. The optical lens according to any one of claims 1 to 7, characterized in that: A distance BFL from the center of the image side surface of the third lens to the imaging surface of the optical lens on the optical axis and a distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.

1.

10. The optical lens according to any one of claims 1 to 7, characterized in that: The effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: |F2 / F3|≤2.

5.

11. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥55.

12. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R4 of the object-side surface of the second lens and a curvature radius R5 of the image-side surface of the second lens satisfy: |R4 / R5|≤1.

13. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R6 of the object-side surface of the third lens and a curvature radius R7 of the image-side surface of the third lens satisfy: |R6 / R7|≤1.

14. The optical lens according to any one of claims 1 to 7, characterized in that: The distance T12 between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: T12 / TTL≤0.

5.

15. The optical lens according to any one of claims 1 to 7, characterized in that: The total effective focal length F of the optical lens and the curvature radius R1 of the object side surface of the first lens satisfy: |F / R1|≥0.

04.

16. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the object-side surface of the second lens satisfy: -2≤(R2-R4) / (R2+R4)≤1.

17. The optical lens according to any one of claims 1 to 7, characterized in that: The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 2.5≤|F3 / F|≤5.

5.

18. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: FOV / H≥30.

19. The optical lens according to any one of claims 1 to 7, characterized in that: The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: |F2 / F|≤5.

20. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and a center thickness T1 of the first lens on the optical axis satisfy: 3≤R1 / (R2+T1)≤10.

21. The optical lens according to any one of claims 1 to 7, characterized in that: The total effective focal length F of the optical lens, the curvature radius R4 of the object side surface of the second lens, and the curvature radius R5 of the image side surface of the second lens satisfy: 0.2≤|F / R4|+|F / R5|≤2.

22. The optical lens according to any one of claims 1 to 7, characterized in that: The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1≤|F1 / F|≤5.

23. The optical lens according to any one of claims 1 to 7, characterized in that: The curvature radius R2 of the image-side surface of the first lens and the total effective focal length F of the optical lens satisfy: R2 / F≥0.

6.

24. The optical lens according to any one of claims 1 to 7, characterized in that: A curvature radius R6 of the object-side surface of the third lens and an effective focal length F3 of the third lens satisfy: R6 / F3≤1.

1.

25. The optical lens according to any one of claims 1 to 7, characterized in that: The Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the Abbe number V3 of the third lens satisfy: V1+V2+V3≥85.

26. The optical lens according to any one of claims 1 to 7, characterized in that: A distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and an image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 2.85≤TTL / H≤3.

8.

27. The optical lens according to any one of claims 1 to 7, characterized in that: The opening angle arctan(1 / K(S2)) of the image side surface of the first lens corresponding to the maximum field angle of the optical lens satisfies: arctan(1 / K(S2))≥50°.

28. The optical lens according to any one of claims 1 to 7, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.15≤H / (F×TTL)≤0.

45.

29. The optical lens according to any one of claims 1 to 7, characterized in that: The total effective focal length F of the optical lens, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: |F / (F1×F2×F3)|≤0.

15.

30. The optical lens according to any one of claims 1 to 7, characterized in that: The maximum clear aperture D of the object side of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle θ of the optical lens in radians satisfy: D / H / θ≤0.

85.

31. The optical lens according to any one of claims 1 to 7, characterized in that: At least one of the following conditions is met: 1≤R1 / R2≤13; D / H / FOV≤0.02; TTL / F≤7.7; F / FNO≥0.9; TTL / H / FOV≤0.04; BFL / TTL≥0.12; ∣F2 / F3|≤2; (FOV×F) / H≥60;∣R4 / R5∣≤0.8;∣R6 / R7∣≤0.8; T12 / TTL≤0.4; |F / R1|≥0.05; -1≤(R2-R4) / (R2+R4)≤0.5; 2.55≤|F3 / F|≤4.5 ; FOV / H≥32; |F2 / F|≤4; 4≤R1 / (R2+T1)≤9; 0.2≤|F / R4|+|F / R5|≤1.5; 1.2≤|F1 / F|≤5; R2 / F≥0.8; R6 / F3≤1; V1+V2 +V3≥90; 2.85≤TTL / H≤3.5; arctan(1 / K(S2))≥52°; 0.18≤H / (F×TTL)≤0.40; |F / (F1×F2×F3)|≤0.1; D / H / θ≤0.8; Wherein, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, FNO is the aperture number of the optical lens, BFL is the distance from the center of the image side of the third lens to the imaging surface of the optical lens on the optical axis, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and R4 is the second The object side surface of the lens is represented by the radius of curvature, R5 is the radius of curvature of the image side surface of the second lens, R6 is the radius of curvature of the object side surface of the third lens, R7 is the radius of curvature of the image side surface of the third lens, T12 is the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, T1 is the center thickness of the first lens on the optical axis, F1 is the effective focal length of the first lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, arctan(1 / K(S2)) is the opening angle of the image side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians.

32. The optical lens according to any one of claims 1 to 7, characterized in that: At least one of the following conditions is met: 8.1490≤R1 / R2≤11.0150;0.0105≤D / H / FOV≤0.0119;6.5698≤TTL / F≤7.0937;1.1953≤F / FNO≤1.2191;0.0198≤TTL / H / FOV≤0.0212;0.2548≤BFL / TTL≤0.2684;0.6528≤∣F2 / F3|≤1.1034;63.3126≤(FOV×F) / H≤66.1432; 0.0456≤∣R4 / R5∣≤0.3997;0.0592≤∣R6 / R7∣≤0.2964;0.2987≤T12 / TTL≤0.3354;0.0759≤|F / R1|≤0.1054;-0.3492≤(R2-R4) / (R2+R4)≤-0.1971;2.5718≤|F3 / F|≤3.9112;36.2283≤FOV / H≤37.6884;2.4921≤|F2 / F|≤2.8378;5.8573≤R1 / (R2+T1)≤8.1041;0.5818≤|F / R4|+|F / R5|≤0.6575;1.4847≤|F1 / F|≤1.5558;1.1309≤R2 / F≤1.2044;0.5845≤R6 / F3≤0.8373;111.3000≤V1+V2+V3≤114.3200;2.8966≤TTL / H≤3.1025;62.8569°≤arctan(1 / K(S2))≤66.0148°;0.1826≤H / (F×TTL)≤0.1964;0.0217≤|F / (F1×F2×F3)|≤0.0291;0.60370≤D / H / θ≤0.68164; Wherein, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, FNO is the aperture number of the optical lens, BFL is the distance from the center of the image side of the third lens to the imaging surface of the optical lens on the optical axis, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and R4 is the second The object side surface of the lens is represented by the radius of curvature, R5 is the radius of curvature of the image side surface of the second lens, R6 is the radius of curvature of the object side surface of the third lens, R7 is the radius of curvature of the image side surface of the third lens, T12 is the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, T1 is the center thickness of the first lens on the optical axis, F1 is the effective focal length of the first lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, arctan(1 / K(S2)) is the opening angle of the image side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians.

33. An optical lens, characterized in that: The optical lens includes, in order from the object side to the image side along the optical axis: a first lens having negative optical power; a second lens having positive optical power; and The third lens has positive power, The distance BFL from the center of the image side surface of the third lens to the imaging surface of the optical lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: BFL / TTL≥0.1; The curvature radius R1 of the object side surface of the first lens and the curvature radius R2 of the image side surface of the first lens satisfy: 1≤R1 / R2≤15; The maximum field of view FOV of the optical lens, the maximum clear aperture D of the object side of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy the following conditions: D / H / FOV≤0.025; The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis and the total effective focal length F of the optical lens satisfy: TTL / F≤8; The total effective focal length F of the optical lens and the aperture number FNO of the optical lens satisfy: F / FNO≥0.8; The number of lenses having optical power in the optical lens is three.

34. The optical lens according to claim 33, characterized in that: The object side surface of the first lens is convex, and the image side surface is concave.

35. The optical lens according to claim 33, characterized in that: The object side surface of the second lens is convex, and the image side surface is concave.

36. The optical lens according to claim 33, characterized in that: The object side surface of the second lens is convex, and the image side surface is convex.

37. The optical lens according to claim 33, characterized in that: The object side surface of the third lens is convex, and the image side surface is convex.

38. The optical lens according to claim 33, characterized in that: The object side surface of the third lens is convex, and the image side surface is concave.

39. The optical lens according to claim 33, characterized in that: The third lens is an aspherical lens.

40. The optical lens according to claim 33, characterized in that: The optical lens comprises an aperture stop, and the aperture stop is located between the first lens and the second lens.

41. The optical lens according to any one of claims 33 to 40, characterized in that: The distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, the maximum field of view FOV of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: TTL / H / FOV≤0.

05.

42. The optical lens according to any one of claims 33 to 40, characterized in that: The effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: |F2 / F3|≤2.

5.

43. The optical lens according to any one of claims 33 to 40, characterized in that: The maximum field of view FOV of the optical lens, the total effective focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV×F) / H≥55.

44. The optical lens according to any one of claims 33 to 40, characterized in that: A curvature radius R4 of the object-side surface of the second lens and a curvature radius R5 of the image-side surface of the second lens satisfy: |R4 / R5|≤1.

45. The optical lens according to any one of claims 33 to 40, characterized in that: A curvature radius R6 of the object-side surface of the third lens and a curvature radius R7 of the image-side surface of the third lens satisfy: |R6 / R7|≤1.

46. ​​The optical lens according to any one of claims 33 to 40, characterized in that: The distance T12 between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: T12 / TTL≤0.

5.

47. The optical lens according to any one of claims 33 to 40, characterized in that: The total effective focal length F of the optical lens and the curvature radius R1 of the object side surface of the first lens satisfy: |F / R1|≥0.

04.

48. The optical lens according to any one of claims 33 to 40, characterized in that: A curvature radius R2 of the image-side surface of the first lens and a curvature radius R4 of the object-side surface of the second lens satisfy: -2≤(R2-R4) / (R2+R4)≤1.

49. The optical lens according to any one of claims 33 to 40, characterized in that: The effective focal length F3 of the third lens and the total effective focal length F of the optical lens satisfy: 2.5≤|F3 / F|≤5.

5.

50. The optical lens according to any one of claims 33 to 40, characterized in that: The maximum field of view FOV of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: FOV / H≥30.

51. The optical lens according to any one of claims 33 to 40, characterized in that: The effective focal length F2 of the second lens and the total effective focal length F of the optical lens satisfy: |F2 / F|≤5.

52. The optical lens according to any one of claims 33-40, characterized in that: A curvature radius R1 of the object-side surface of the first lens, a curvature radius R2 of the image-side surface of the first lens, and a center thickness T1 of the first lens on the optical axis satisfy: 3≤R1 / (R2+T1)≤10.

53. The optical lens according to any one of claims 33-40, characterized in that: The total effective focal length F of the optical lens, the curvature radius R4 of the object side surface of the second lens, and the curvature radius R5 of the image side surface of the second lens satisfy: 0.2≤|F / R4|+|F / R5|≤2.

54. The optical lens according to any one of claims 33-40, characterized in that: The effective focal length F1 of the first lens and the total effective focal length F of the optical lens satisfy: 1≤|F1 / F|≤5.

55. The optical lens according to any one of claims 33-40, characterized in that: The curvature radius R2 of the image-side surface of the first lens and the total effective focal length F of the optical lens satisfy: R2 / F≥0.

6.

56. The optical lens according to any one of claims 33-40, characterized in that: A curvature radius R6 of the object-side surface of the third lens and an effective focal length F3 of the third lens satisfy: R6 / F3≤1.

1.

57. The optical lens according to any one of claims 33-40, characterized in that: The Abbe number V1 of the first lens, the Abbe number V2 of the second lens, and the Abbe number V3 of the third lens satisfy: V1+V2+V3≥85.

58. The optical lens according to any one of claims 33-40, characterized in that: A distance TTL from the center of the object-side surface of the first lens to the imaging surface of the optical lens on the optical axis and an image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 2.85≤TTL / H≤3.

8.

59. The optical lens according to any one of claims 33-40, characterized in that: The opening angle arctan(1 / K(S2)) of the image side surface of the first lens corresponding to the maximum field angle of the optical lens satisfies: arctan(1 / K(S2))≥50°.

60. The optical lens according to any one of claims 33-40, characterized in that: The image height H corresponding to the maximum field angle of the optical lens, the total effective focal length F of the optical lens, and the distance TTL from the center of the object side surface of the first lens to the imaging surface of the optical lens on the optical axis satisfy: 0.15≤H / (F×TTL)≤0.

45.

61. The optical lens according to any one of claims 33-40, characterized in that: The total effective focal length F of the optical lens, the effective focal length F1 of the first lens, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens satisfy: |F / (F1×F2×F3)|≤0.

15.

62. The optical lens according to any one of claims 33-40, characterized in that: The maximum clear aperture D of the object side of the first lens corresponding to the maximum field angle of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle θ of the optical lens in radians satisfy: D / H / θ≤0.

85.

63. The optical lens according to any one of claims 33-40, characterized in that: At least one of the following conditions is met: 1≤R1 / R2≤13; D / H / FOV≤0.02; TTL / F≤7.7; F / FNO≥0.9; TTL / H / FOV≤0.04; BFL / TTL≥0.12; ∣F2 / F3|≤2; (FOV×F) / H≥60;∣R4 / R5∣≤0.8;∣R6 / R7∣≤0.8; T12 / TTL≤0.4; |F / R1|≥0.05; -1≤(R2-R4) / (R2+R4)≤0.5; 2.55≤|F3 / F|≤4.5 ; FOV / H≥32; |F2 / F|≤4; 4≤R1 / (R2+T1)≤9; 0.2≤|F / R4|+|F / R5|≤1.5; 1.2≤|F1 / F|≤5; R2 / F≥0.8; R6 / F3≤1; V1+V2 +V3≥90; 2.85≤TTL / H≤3.5; arctan(1 / K(S2))≥52°; 0.18≤H / (F×TTL)≤0.40; |F / (F1×F2×F3)|≤0.1; D / H / θ≤0.8; Wherein, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, FNO is the aperture number of the optical lens, BFL is the distance from the center of the image side of the third lens to the imaging surface of the optical lens on the optical axis, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and R4 is the second The object side surface of the lens is represented by the radius of curvature, R5 is the radius of curvature of the image side surface of the second lens, R6 is the radius of curvature of the object side surface of the third lens, R7 is the radius of curvature of the image side surface of the third lens, T12 is the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, T1 is the center thickness of the first lens on the optical axis, F1 is the effective focal length of the first lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, arctan(1 / K(S2)) is the opening angle of the image side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians.

64. The optical lens according to any one of claims 33-40, characterized in that: At least one of the following conditions is met: 8.1490≤R1 / R2≤11.0150; 0.0105≤D / H / FOV≤0.0119; 6.5698≤TTL / F≤7.0937; 1.1953≤F / FNO≤1.2191; 0.019 8≤TTL / H / FOV≤0.0212; 0.2548≤BFL / TTL≤0.2684; 0.6528≤∣F2 / F3|≤1.1034; 63.3126≤(FOV×F) / H≤66.1432; 0.0456≤∣R4 / R5∣≤0.3997; 0.0592≤∣R6 / R7∣≤0.2964; 0.2987≤T12 / TTL≤0.3354; 0.0759≤|F / R1|≤0.1054; -0.3492≤(R2-R4) / (R2+R4)≤-0 .1971; 2.5718≤|F3 / F|≤3.9112; 36.2283≤FOV / H≤37.6884; 2.4921≤|F2 / F|≤2.8378; 5.8573≤R1 / (R2+T1)≤8.1041; 0.5818≤|F / R4|+|F / R 5|≤0.6575; 1.4847≤|F1 / F|≤1.5558; 1.1309≤R2 / F≤1.2044; 0.5845≤R6 / F3≤0.8373; 111.3000≤V1+V2+V3≤114.3200; 2.8966≤TTL / H≤3.1 025; 62.8569°≤arctan(1 / K(S2))≤66.0148°; 0.1826≤H / (F×TTL)≤0.1964; 0.0217≤|F / (F1×F2×F3)|≤0.0291; 0.60370≤D / H / θ≤0.68164; Wherein, R1 is the radius of curvature of the object side of the first lens, R2 is the radius of curvature of the image side of the first lens, FOV is the maximum field of view of the optical lens, D is the maximum aperture of the object side of the first lens corresponding to the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the distance from the center of the object side of the first lens to the imaging surface of the optical lens on the optical axis, F is the total effective focal length of the optical lens, FNO is the aperture number of the optical lens, BFL is the distance from the center of the image side of the third lens to the imaging surface of the optical lens on the optical axis, F2 is the effective focal length of the second lens, F3 is the effective focal length of the third lens, and R4 is the second The object side surface of the lens is represented by the radius of curvature, R5 is the radius of curvature of the image side surface of the second lens, R6 is the radius of curvature of the object side surface of the third lens, R7 is the radius of curvature of the image side surface of the third lens, T12 is the distance between the center of the image side surface of the first lens and the center of the object side surface of the second lens on the optical axis, T1 is the center thickness of the first lens on the optical axis, F1 is the effective focal length of the first lens, V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, V3 is the Abbe number of the third lens, arctan(1 / K(S2)) is the opening angle of the image side surface of the first lens corresponding to the maximum field of view of the optical lens, and θ is the maximum field of view of the optical lens in radians.

65. An electronic device, characterized in that: It comprises an optical lens according to any one of claims 1-64 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images