Optical lens and electronic device

Abstract

The application provides an optical lens and an electronic device. The optical lens comprises: a first lens with negative optical power, wherein an object side surface of the first lens is a convex surface, and an image side surface of the first lens is a concave surface; a second lens with positive optical power, wherein an object side surface of the second lens is a concave surface, and an image side surface of the second lens is a convex surface; a third lens with positive optical power, wherein an object side surface of the third lens is a convex surface, and an image side surface of the third lens is a convex surface; a fourth lens with positive optical power, wherein at least one of an object side surface and an image side surface of the fourth lens is a convex surface; a fifth lens with negative optical power, wherein an object side surface of the fifth lens is a concave surface, and an image side surface of the fifth lens is a convex surface; a sixth lens with positive optical power, wherein at least one of an object side surface and an image side surface of the sixth lens is a convex surface; and a seventh lens with positive optical power, wherein at least one of an object side surface and an image side surface of the seventh lens is a convex surface. The application solves the problem that the optical lens in the prior art is difficult to simultaneously consider small CRA, large aperture and miniaturization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical imaging devices, in particular to an optical lens and an electronic device. BACKGROUND

[0002] With the development of science and technology and the progress of society, the automobile auxiliary driving system has been developed maturely, and the vehicle-mounted laser radar lens has been more and more widely applied to the automobile. After the laser radar emits, the energy of the collected reflected light can accurately distinguish the environment details.

[0003] In addition, with the popularization of unmanned driving technology, the requirements of the vehicle-mounted radar lens as the eyes of the automobile are also getting higher and higher. The ordinary vehicle-mounted lens has a small aperture and a large FNO, which cannot realize more energy collection, or the optical lens cannot realize high energy collection while being miniaturized, or the CRA is large, resulting in the situation of edge energy loss after matching with the chip. Therefore, the market currently needs a high-resolution radar optical lens with miniaturization, large aperture and small CRA, and can realize high energy collection, etc., which is used for detecting a farther distance and accurately distinguishing the environment details.

[0004] Some manufacturers propose an optical lens, but the resolving power of the optical lens is low, mostly at the VGA pixel level, which is difficult to meet the demand of high resolution. Some manufacturers also propose an optical lens, but the optical lens generally has a small aperture, a small entrance pupil diameter and a large FNO. At the same time, the optical lens in the prior art generally has a too long total length of optical system, which is difficult to meet the demand of miniaturization. In addition, the CRA of the optical lens of some manufacturers is large, resulting in the situation of poor matching with the chip.

[0005] That is, the optical lens in the prior art has the problem that small CRA, large aperture and miniaturization are difficult to be considered simultaneously. SUMMARY

[0006] The main purpose of the present application is to provide an optical lens and an electronic device to solve the problem that the optical lens in the prior art has the problem that small CRA, large aperture and miniaturization are difficult to be considered simultaneously.

[0007] In order to achieve the above object, according to one aspect of the present application, an optical lens is provided, which comprises, in order from the object side to the image side along the optical axis, a first lens, the first lens having a negative focal power, the object side surface of the first lens being a convex surface, and the image side surface of the first lens being a concave surface; a second lens, the second lens having a positive focal power, the object side surface of the second lens being a concave surface, and the image side surface of the second lens being a convex surface; a third lens, the third lens having a positive focal power, the object side surface of the third lens being a convex surface, and the image side surface of the third lens being a convex surface; a fourth lens, the fourth lens having a positive focal power, at least one of the object side surface and the image side surface of the fourth lens being a convex surface; a fifth lens, the fifth lens having a negative focal power, the object side surface of the fifth lens being a concave surface, and the image side surface of the fifth lens being a convex surface; a sixth lens, the sixth lens having a positive focal power, at least one of the object side surface and the image side surface of the sixth lens being a convex surface; and a seventh lens, the seventh lens having a positive focal power, at least one of the object side surface and the image side surface of the seventh lens being a convex surface.

[0008] Further, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface.

[0009] Further, the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface.

[0010] Further, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface.

[0011] Further, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface.

[0012] Further, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface.

[0013] Further, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface.

[0014] Further, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface.

[0015] Further, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens.

[0016] Further, the second lens is an aspherical lens.

[0017] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0018] Further, the total optical length of the optical lens, i.e., the distance TTL from the center of the object side surface of the first lens of the optical lens to the center of the imaging surface 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 FOV of the optical lens satisfy: TTL / H / FOV≤0.06.

[0019] Further, a center curvature radius R1 of an object side surface of the first lens of the optical lens and a center curvature radius R2 of an image side surface of the first lens of the optical lens satisfy: R1 / R2≥4.

[0020] Further, a maximum light passing aperture D of the object side surface of the first lens corresponding to a maximum field angle of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, and an arc value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤2.

[0021] Further, an optical back focal length BFL of the optical lens, i.e., a distance from a center of an image side of a last lens of the optical lens to a center of an imaging surface, and a total optical length TTL of the optical lens, i.e., a distance from a center of an object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: BFL / TTL≥0.07.

[0022] Further, a focal length value F4 of the fourth lens and a focal length value F5 of the fifth lens satisfy: |F4 / F5|≤1.5.

[0023] Further, a center curvature radius R3 of an object side surface of the second lens of the optical lens and a center curvature radius R4 of an image side surface of the second lens of the optical lens satisfy: |R3 / R4|≤1.

[0024] Further, a center distance T12 from the image side surface of the first lens to the object side surface of the second lens of the optical lens and a total optical length TTL of the optical lens, i.e., a distance from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens, satisfy: T12 / TTL≥0.1.

[0025] Further, a total optical length TTL of the optical lens, i.e., a distance from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens, and a total focal length value F of the optical lens satisfy: TTL / F≤15.

[0026] Further, a focal length value F1 of the first lens and a total focal length value F of the optical lens satisfy: |F1 / F|≤4.

[0027] Further, a focal length value F3 of the third lens and a total focal length value F of the optical lens satisfy: 2.5≤|F3 / F|≤8.

[0028] Further, a focal length value F4 of the fourth lens and a total focal length value F of the optical lens satisfy: |F4 / F|≤6.

[0029] Further, a focal length value F5 of the fifth lens and a total focal length value F of the optical lens satisfy: |F5 / F|≤6.

[0030] Further, a focal length value F6 of the sixth lens and a total focal length value F of the optical lens satisfy: 0≤F6 / F≤15.

[0031] Further, a focal length value F7 of the seventh lens and the total focal length value F of the optical lens satisfy: 0≤F7 / F≤16.

[0032] Further, the focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: |F6 / F7|≤3.

[0033] Further, a central curvature radius R2 of an image side surface of the first lens of the optical lens and a central curvature radius R3 of an object side surface of the second lens of the optical lens satisfy: |(|R2|-|R3|) / (|R2|+|R3|)|≤0.3.

[0034] Further, a maximum value dn of thickness in the first lens to the seventh lens and a minimum value dm of thickness in the first lens to the seventh lens satisfy: dn / dm≤4.

[0035] Further, an opening angle arctan(1 / K(R2)) at a maximum field angle of the image side surface of the first lens of the optical lens satisfies: arctan(1 / K(R2))≥45, wherein K is a lens edge slope at the maximum field angle of the image side surface of the first lens of the optical lens, and R2 is a central curvature radius of the image side surface of the first lens.

[0036] Further, the total focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.4.

[0037] Further, an optical total length of the optical lens, i.e., a distance TTL from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens and a maximum half aperture DMAX in the first lens to the seventh lens satisfy: TTL / DMAX≤7.

[0038] Further, a central curvature radius R3 of the object side surface of the second lens of the optical lens and a central curvature radius R4 of the image side surface of the second lens of the optical lens satisfy: -25≤1 / (1 / R3-1 / R4)≤-10.

[0039] Further, a focal length value F2 of the second lens and the total focal length value F of the optical lens satisfy: F2 / F≥1.

[0040] Further, a central radius of curvature R3 of an object side surface of the second lens, a central radius of curvature R4 of an image side surface of the second lens, a refractive index ND2 of the second lens, and a central thickness T2 of the second lens satisfy (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND1*R3*R4)≥0.

[0041] Further, an effective clear aperture DL7 of the image side surface of the seventh lens, an optical back focal length of the optical lens, i.e., a distance BFL from a center of an image side surface of a last lens of the optical lens to a center of an imaging surface, and an image height H corresponding to a maximum field angle of the optical lens satisfy 4≤DL7*BFL / H≤15.

[0042] Further, an effective clear aperture DL7 of the image side surface of the seventh lens and an image height H corresponding to a maximum field angle of the optical lens satisfy 0.5≤DL7 / H≤5.

[0043] Further, a diaphragm aperture DGL and an overall focal length F of the optical lens satisfy 2≤DGL / F.

[0044] According to another aspect of the present application, there is provided an optical lens comprising, in order from an object side to an image side along an optical axis, a first lens having a negative focal length, a second lens having a positive focal length, a third lens having a positive focal length, a fourth lens having a positive focal length, a fifth lens having a negative focal length, a sixth lens having a positive focal length, and a seventh lens having a positive focal length, wherein an optical total track length of the optical lens, i.e., a distance TTL from a center of an object side surface of the first lens of the optical lens to a center of an imaging surface of the optical lens, and an overall focal length F of the optical lens satisfy TTL / F≤15.

[0045] Further, an object side surface of the first lens is convex, and an image side surface of the first lens is concave.

[0046] Further, an object side surface of the second lens is concave, and an image side surface of the second lens is convex.

[0047] Further, an object side surface of the third lens is convex, and an image side surface of the third lens is convex.

[0048] Further, an object side surface of the fourth lens is convex, and an image side surface of the fourth lens is convex.

[0049] Further, an object side surface of the fourth lens is concave, and an image side surface of the fourth lens is convex.

[0050] Further, an object side surface of the fifth lens is concave, and an image side surface of the fifth lens is convex.

[0051] Further, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface.

[0052] Further, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface.

[0053] Further, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface.

[0054] Further, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface.

[0055] Further, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface.

[0056] Further, the optical lens further comprises a diaphragm, and the diaphragm is arranged between the third lens and the fourth lens.

[0057] Further, the second lens is an aspherical lens.

[0058] Further, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0059] Further, the total optical length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface 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 FOV of the optical lens satisfy: TTL / H / FOV≤0.06.

[0060] Further, the center curvature radius R1 of the object side surface of the first lens of the optical lens and the center curvature radius R2 of the image side surface of the first lens of the optical lens satisfy: R1 / R2≥4.

[0061] Further, the maximum light passing aperture D of the object side surface 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 radian value θ corresponding to the maximum field of view of the optical lens satisfy: D / H / θ≤2.

[0062] Further, the optical back focal length of the optical lens, i.e., the center distance BFL from the image side center of the last lens of the optical lens to the center of the imaging surface, and the total optical length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: BFL / TTL≥0.07.

[0063] Further, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: |F4 / F5|≤1.5.

[0064] Further, a center curvature radius R3 of an object side surface of the second lens of the optical lens and a center curvature radius R4 of an image side surface of the second lens of the optical lens satisfy: |R3 / R4|≤1.

[0065] Further, a center distance T12 from the image side surface of the first lens to the object side surface of the second lens of the optical lens and an overall optical length of the optical lens, i.e., a center distance TTL from the object side surface of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: T12 / TTL≥0.1.

[0066] Further, a focal length value F1 of the first lens and an overall focal length value F of the optical lens satisfy: |F1 / F|≤4.

[0067] Further, a focal length value F3 of the third lens and an overall focal length value F of the optical lens satisfy: 2.5≤|F3 / F|≤8.

[0068] Further, a focal length value F4 of the fourth lens and an overall focal length value F of the optical lens satisfy: |F4 / F|≤6.

[0069] Further, a focal length value F5 of the fifth lens and an overall focal length value F of the optical lens satisfy: |F5 / F|≤6.

[0070] Further, a focal length value F6 of the sixth lens and an overall focal length value F of the optical lens satisfy: 0≤F6 / F≤15.

[0071] Further, a focal length value F7 of the seventh lens and an overall focal length value F of the optical lens satisfy: 0≤F7 / F≤16.

[0072] Further, a focal length value F6 of the sixth lens and a focal length value F7 of the seventh lens satisfy: |F6 / F7|≤3.

[0073] Further, a center curvature radius R2 of the image side surface of the first lens of the optical lens and a center curvature radius R3 of the object side surface of the second lens of the optical lens satisfy: |(|R2|-|R3|) / (|R2|+|R3|)|≤0.3.

[0074] Further, a maximum value dn of thickness in the first lens to the seventh lens and a minimum value dm of thickness in the first lens to the seventh lens satisfy: dn / dm≤4.

[0075] Further, an opening angle arctan(1 / K(R2)) of the image side surface of the first lens of the optical lens at a maximum field of view angle satisfies: arctan(1 / K(R2))≥45, where K is a lens edge slope of the image side surface of the first lens of the optical lens at the maximum field of view angle, and R2 is a center curvature radius of the image side surface of the first lens.

[0076] Further, an overall focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.4.

[0077] Further, an overall optical length of the optical lens, i.e. a distance TTL from a center of an object side of the first lens of the optical lens to a center of an imaging surface of the optical lens and a maximum half aperture radius DMAX in the first lens to the seventh lens satisfy: TTL / DMAX≤7.

[0078] Further, a center curvature radius R3 of an object side of the second lens of the optical lens and a center curvature radius R4 of an image side of the second lens of the optical lens satisfy: -25≤1 / (1 / R3-1 / R4)≤-10.

[0079] Further, a focal length value F2 of the second lens and an overall focal length value F of the optical lens satisfy: F2 / F≥1.

[0080] Further, the center curvature radius R3 of the object side of the second lens of the optical lens, the center curvature radius R4 of the image side of the second lens of the optical lens, a refractive index ND2 of the second lens and a center thickness T2 of the second lens satisfy: (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND1*R3*R4)≥0.

[0081] Further, an effective clear aperture DL7 of the image side of the seventh lens, an optical back focal length BFL of the optical lens, i.e. a distance from a center of an image side of the last lens of the optical lens to the center of the imaging surface and an image height H corresponding to a maximum field angle of the optical lens satisfy: 4≤DL7*BFL / H≤15.

[0082] Further, the effective clear aperture DL7 of the image side of the seventh lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤DL7 / H≤5.

[0083] Further, a diaphragm aperture DGL and the overall focal length value F of the optical lens satisfy: 2≤DGL / F.

[0084] According to another aspect of the present application, there is provided an electronic device comprising the optical lens described above and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0085] The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens along the optical axis from the object side to the image side, the first lens has a negative focal length, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has a positive focal length, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface; the third lens has a positive focal length, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a convex surface; the fourth lens has a positive focal length, at least one of the object side surface and the image side surface of the fourth lens is a convex surface; the fifth lens has a negative focal length, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has a positive focal length, at least one of the object side surface and the image side surface of the sixth lens is a convex surface; and the seventh lens has a positive focal length, at least one of the object side surface and the image side surface of the seventh lens is a convex surface.

[0086] The first lens has a negative focal length, which is beneficial to diverging light rays, makes the light rays smoothly transition after passing through the first lens, and increases the light quantity and the illumination by making the light rays with a large angle enter the first lens as much as possible. The first lens is beneficial to reducing the optical path of the light rays in the rear, so that the short TTL is realized and the miniaturization is ensured. The object side surface of the first lens is a convex surface, which is beneficial to the sliding of water drops in the actual application and realizes the collection of higher energy. The first lens preferably uses a high refractive index material, which is beneficial to reducing the front aperture and improving the imaging quality. The second lens has a positive focal length, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a convex surface. The second lens has a positive focal length, so that the light rays diverged by the first lens can smoothly enter the rear, is beneficial to correcting high-order aberrations, and is more helpful to reducing the attenuation degree of the relative illumination of the optical lens and realizing high energy. Since the second lens has a positive focal length, it is beneficial to converging the light rays and realizing the characteristics of a large aperture.

[0087] The third lens has positive refractive power, which is more conducive to the third lens to better converge light rays and achieve higher energy collection. The object side of the third lens is a convex surface, and the image side of the third lens is a convex surface, which is conducive to balancing the pressure of the front and rear lenses, making the light ray trend smooth transition, smoothly entering the rear optical system, relieving the pressure of the rear lens, being conducive to the reduction of the rear aperture, making the lens size uniform, and further making the optical lens more compact. Meanwhile, the third lens is a double-convex lens, which can control the light ray trend between the second lens and the fourth lens, reduce the aberration caused by the large-angle light rays entering through the second lens, and make the structure between adjacent lenses compact, which is conducive to ensuring the miniaturization of the optical lens. The fourth lens has positive refractive power. When the object side and the image side of the fourth lens are both convex, the spherical aberration introduced by the front lens of the fourth lens can be compensated, further correcting the aberration generated by the front lens group, and the light rays are converged again, that is, the aperture of the optical lens can be increased, and the total length of the lens can be shortened, achieving miniaturization. When the object side of the fourth lens is a concave surface and the image side is a convex surface, the light beam can be converged, the aperture of the lens can be increased, and the optical system can have a relatively short total length, ensuring miniaturization.

[0088] The fifth lens has negative refractive power, the object side of the fifth lens is a concave surface, and the image side of the fifth lens is a convex surface, with a large difference in the two surface angles, which can better emit the light rays emitted by the fourth lens, achieve higher energy collection, and the concave-convex lens has a larger contact area with the mechanism plane during assembly, the lens tilt is less sensitive, and the assembly is facilitated, thereby reducing the cost. The sixth lens has positive refractive power, and at least one of the object side and the image side of the sixth lens is a convex surface. When the object side of the sixth lens is a concave surface and the image side is a convex surface, the CRA can be reduced. The image side of the sixth lens is a convex surface, and the image side angle of the sixth lens is small, which ensures that the light rays emitted from the sixth lens are incident to the object side of the seventh lens, and the incident light rays are relatively smooth, thereby reducing the tolerance sensitivity of the optical system. When the object side and the image side of the sixth lens are both convex, the CRA can be reduced. The seventh lens has positive refractive power, and at least one of the object side and the image side of the seventh lens is a convex surface. When the seventh lens is a convex object side and a concave image side, it is conducive to the smooth entry of light rays into the imaging surface, and conducive to the improvement of the resolving power, while the various aberrations of the optical system are fully corrected, the resolution, optimization of distortion, CRA, and other optical properties can be improved under the premise of compact structure. When the object side and the image side of the seventh lens are both convex, the CRA can be reduced, and the distortion and other optical properties can be reduced. When the seventh lens is a convex object side and a concave image side, it is conducive to the smooth entry of light rays into the image surface, the resolving power, the resolution, and the distortion and other optical properties can be improved.

[0089] In addition, the optical lens has the advantages of high resolution, wide angle, good temperature performance, miniaturization, large aperture, small FNO, small CRA, long back focal length, convenient assembly, simple structure, and low cost. BRIEF DESCRIPTION OF DRAWINGS

[0090] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated herein by reference. The embodiments disclosed in the drawings are illustrative of the present application and are not meant to limit the application as described in this disclosure. In the drawings:

[0091] Figure 1 A structural schematic diagram of an optical lens of Example One of the present application is shown;

[0092] Figure 2 A structural schematic diagram of an optical lens of Example Two of the present application is shown;

[0093] Figure 3 A structural schematic diagram of an optical lens of Example Three of the present application is shown;

[0094] Figure 4 A structural schematic diagram of an optical lens of Example Four of the present application is shown;

[0095] Figure 5 A structural schematic diagram of an optical lens of Example Five of the present application is shown;

[0096] Figure 6 A structural schematic diagram of an optical lens of Example Six of the present application is shown;

[0097] Figure 7 A structural schematic diagram of an optical lens of Example Seven of the present application is shown;

[0098] Figure 8 A structural schematic diagram of an optical lens of Example Eight of the present application is shown;

[0099] Figure 9 A structural schematic diagram of an optical lens of Example Nine of the present application is shown;

[0100] Figure 10 A structural schematic diagram of an optical lens of Example Ten of the present application is shown;

[0101] Figure 11 A structural schematic diagram of an optical lens of Example Eleven of the present application is shown;

[0102] Figure 12 A structural schematic diagram of an optical lens of Example Twelve of the present application is shown;

[0103] Figure 13 A structural schematic diagram of an optical lens of Example Thirteen of the present application is shown;

[0104] Figure 14 A structural diagram of an optical lens of an example fourteen of the present application is shown.

[0105] Wherein, the above figures include the following reference signs:

[0106] L1, first lens; S1, object side surface of the first lens; S2, image side surface of the first lens; L2, second lens; S3, object side surface of the second lens; S4, image side surface of the second lens; L3, third lens; S5, object side surface of the third lens; S6, image side surface of the third lens; STO, stop; L4, fourth lens; S8, object side surface of the fourth lens; S9, image side surface of the fourth lens; L5, fifth lens; S9, object side surface of the fifth lens; S10, image side surface of the fifth lens; L6, sixth lens; S11, object side surface of the sixth lens; S12, image side surface of the sixth lens; L7, seventh lens; S13, object side surface of the seventh lens; S14, image side surface of the seventh lens; L8, filter; S15, object side surface of the filter; S16, image side surface of the filter; L9, protective glass; S17, object side surface of the protective glass; S18, image side surface of the protective glass; IMA, imaging surface. DETAILED DESCRIPTION

[0107] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict, unless otherwise specified. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0108] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs.

[0109] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0110] It should be noted that, in the present 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, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0111] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0112] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object side is called the object-side surface of the lens, and the surface of each lens closest to the image side is called the image-side surface of the lens. The surface shape in the paraxial region can be determined according to the judgment method commonly used by those knowledgeable in the field, using the R value (R refers to the radius of curvature of the paraxial region, usually the R value in the lens database of optical software) to determine concavity or convexity. For the object-side surface, when the R value is positive, it is determined to be convex, and when the R value is negative, it is determined to be concave; for the image-side surface, when the R value is positive, it is determined to be concave, and when the R value is negative, it is determined to be convex.

[0113] In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a vehicle-mounted lens. In an exemplary embodiment, the optical lens provided in this application can be used, for example, as a projection lens or a lidar transmitter lens.

[0114] To address the problem that existing optical lenses cannot simultaneously achieve small CRA (Cut-off Aperture), large aperture, and miniaturization, this invention provides an optical lens and an electronic device.

[0115] Example 1

[0116] like Figures 1 to 14 As shown, the optical lens includes, along the optical axis from the object side to the image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. The first lens has negative optical power, its object side is convex, and its image side is concave. The second lens has positive optical power, its object side is concave, and its image side is convex. The third lens has positive optical power, its object side is convex, and its image side is convex. The fourth lens has positive optical power, and at least one of its object side and image side is convex. The fifth lens has negative optical power, its object side is concave, and its image side is convex. The sixth lens has positive optical power, and at least one of its object side and image side is convex. The seventh lens has positive optical power, and at least one of its object side and image side is convex.

[0117] The first lens has negative focal power, is beneficial to divergent light, makes the light smooth transition after the first lens, and makes the large-angle light enter the first lens as much as possible, increases the light quantity and improves the illumination; it is more beneficial to reduce the optical path of the rear light to realize short TTL and ensure miniaturization. The object side of the first lens is convex, which is beneficial to the sliding of water droplets in actual application, and realizes higher energy collection. The first lens preferably uses high refractive index material, which is beneficial to the reduction of the front aperture and the improvement of the imaging quality. The second lens has positive focal power, the object side of the second lens is concave, and the image side of the second lens is convex. The second lens has positive focal power, so that the light diverged by the first lens can smoothly enter the rear; it is also beneficial to correct high-order aberration, and more helpful to reduce the attenuation degree of the relative illumination of the optical lens, realize high energy, and because the second lens has positive focal length, it is beneficial to the convergence of light and the realization of large aperture.

[0118] The third lens has positive focal power, which is more beneficial to the better convergence of light by the third lens, and realizes higher energy collection. The object side of the third lens is convex, and the image side of the third lens is convex, which is beneficial to balance the pressure of the front and rear lenses, make the light smooth transition, smoothly enter the rear optical system, relieve the pressure of the rear lens, and is beneficial to the reduction of the rear aperture, make the lens size uniform, and further make the optical lens more compact. At the same time, the third lens is a double-convex lens, which can control the light trend between the second lens and the fourth lens, reduce the aberration caused by the large-angle light entering the second lens, and make the structure between adjacent lenses compact, which is beneficial to ensure the miniaturization of the optical lens. The fourth lens has positive focal power, when the object side and the image side of the fourth lens are both convex, the spherical aberration introduced by the front lens of the fourth lens can be compensated, the aberration generated by the front lens group is further corrected, and the light is converged again, that is, the aperture of the optical lens can be increased, and the total length of the lens can be shortened to realize miniaturization. When the object side of the fourth lens is concave and the image side is convex, the lens is a crescent lens, which can converge the light beam, increase the aperture of the lens, and make the optical system have a relatively short total length to ensure miniaturization.

[0119] The fifth lens has negative refractive power, the object side surface of the fifth lens is concave, the image side surface of the fifth lens is convex, and the difference between the two surface angles is large, which can better emit the light emitted by the fourth lens, realize higher energy collection, and the concave-convex lens has a larger contact area with the mechanism plane during assembly, the lens tilt is less sensitive, and assembly is facilitated, thereby reducing the cost. The sixth lens has positive refractive power, at least one of the object side surface and the image side surface of the sixth lens is convex, when the object side surface of the sixth lens is concave and the image side surface is convex, the CRA can be reduced, the image side surface of the sixth lens is convex and the image side surface angle of the sixth lens is small, which ensures that the light emitted from the sixth lens is incident on the object side surface of the seventh lens, and the incident light is relatively flat, thereby reducing the tolerance sensitivity of the optical system. When the object side surface and the image side surface of the sixth lens are both convex, it is beneficial to reduce the CRA. The seventh lens has positive refractive power, at least one of the object side surface and the image side surface of the seventh lens is convex, when the seventh lens is a convex-on-the-object-side and concave-on-the-image-side meniscus lens, it is beneficial to the light entering the imaging surface, and it is beneficial to improve the resolving power, and at the same time, various aberrations of the optical system are fully corrected, and on the premise of compact structure, the resolution, distortion, CRA and other optical performances can be improved. When the object side surface and the image side surface of the seventh lens are both convex, it is beneficial to reduce the CRA and reduce the distortion and other optical performances. When the seventh lens is a convex-on-the-object-side and concave-on-the-image-side meniscus lens, it is beneficial to the light entering the image surface, improves the resolving power, improves the resolution, and reduces the distortion and other optical performances.

[0120] In addition, the optical lens also has the advantages of high resolution, wide angle, good temperature performance, miniaturization, large aperture and small FNO, small CRA, long back focal length, easy assembly, simple structure and low cost. In the embodiment, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex. The fourth lens is a double-convex lens with positive refractive power, which can compensate for the spherical aberration introduced by the front lens, further correct the aberration generated by the front lens group, and make the light beam converge again, i.e. increase the aperture of the optical lens, and shorten the total length of the optical lens to ensure miniaturization.

[0121] In the embodiment, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The fourth lens is a meniscus lens with positive refractive power, which can make the light beam converge again, i.e. increase the aperture of the optical lens, and make the optical system have a relatively short total length.

[0122] In the embodiment, the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a convex surface. The sixth lens is a positive focal length lens, has a mirror surface with the image side surface convex to the image side while reducing the CRA, and has a smaller image side surface angle, which ensures that the light rays exiting the sixth lens are incident on the object side surface of the seventh lens more gently, thereby reducing the tolerance sensitivity of the optical system.

[0123] In the embodiment, the object side surface of the sixth lens is a convex surface, and the image side surface of the sixth lens is a convex surface. The sixth lens is a biconvex lens, which is a positive focal length lens and is beneficial to reducing the CRA.

[0124] In the embodiment, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface. The seventh lens is a meniscus lens, which is beneficial to the light rays entering the imaging surface gently and improving the resolving power, and at the same time, makes various aberrations of the optical system be fully corrected, so that the resolution, the optimized distortion, the CRA and other optical performances can be improved under the premise of compact structure.

[0125] In the embodiment, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a convex surface. The seventh lens is a biconvex lens, which is beneficial to reducing the CRA and reducing the distortion and other optical performances.

[0126] In the embodiment, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a convex surface. The seventh lens is a meniscus lens, which is beneficial to the light rays entering the imaging surface gently, improving the resolving power, improving the resolution, reducing the CRA, reducing the distortion and other optical performances.

[0127] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. Such arrangement is beneficial to effectively converging the light rays entering the optical system and reducing the aperture of the lens in the optical system.

[0128] In the embodiment, the second lens is an aspheric lens, which can further improve the resolving power of the optical lens.

[0129] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. Such an arrangement can smoothly transition the light rays passing through the front lens to the rear optical system, reducing the total length of the optical lens. The various aberrations of the optical system are corrected, and the resolution, optimized distortion, CRA, and other optical performance can be improved under the premise of compact structure. At the same time, by arranging the cemented lens, the air gap between the fourth lens and the fifth lens can be reduced, the total length of the system can be reduced, the components between the fourth lens and the fifth lens can be reduced, the process can be reduced, and the cost can be reduced. At the same time, the tolerance sensitivity problem of the lens unit caused by the tilt or eccentricity in the assembly process can be reduced. The light loss caused by reflection between the fourth lens and the fifth lens can also be reduced, and the illumination can be improved. In addition, the field curvature can be further reduced, and the off-axis point aberration of the system can be corrected.

[0130] In the embodiment, the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: TTL / H / FOV≤0.06. Satisfying this condition can effectively limit the length of the optical lens at a large angle, which is beneficial to miniaturization. Preferably, TTL / H / FOV≤0.05.

[0131] In the embodiment, the center curvature radius R1 of the object side of the first lens of the optical lens and the center curvature radius R2 of the image side of the first lens of the optical lens satisfy: R1 / R2≥4. By reasonably setting the shape of the first lens, the bending directions of the two R values are consistent, and the difference is large, which is beneficial to the first lens to collect more light rays of a large angle into the rear optical system, and to reduce the front end aperture of the lens and the volume, which is beneficial to improve the resolution while realizing miniaturization. Preferably, R1 / R2≥5.

[0132] In the embodiment, the maximum light passing 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 radian value θ corresponding to the maximum field angle of the optical lens satisfy: D / H / θ≤2. Satisfying this condition is beneficial to ensure that the front end aperture of the optical lens is small and miniaturized. Preferably, D / H / θ≤1.7.

[0133] In the embodiment, the optical back focus of the optical lens, i.e., the center distance BFL from the image side center of the last lens of the optical lens to the center of the imaging surface, and the optical total length of the optical lens, i.e., the center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: BFL / TTL≥0.07. Satisfying this condition ensures the back focus length on the basis of realizing miniaturization, which is beneficial to the assembly of the module. Preferably, BFL / TTL≥0.09.

[0134] In the embodiment, the focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: |F4 / F5|≤1.5. Satisfying the condition, the focal length of the fourth lens and the fifth lens are similar, which helps the light transition smoothly, is beneficial to correct chromatic aberration, improves image quality, and effectively improves the lens thermal compensation. Preferably, |F4 / F5|≤1.3.

[0135] In the embodiment, the central curvature radius R3 of the object side surface of the second lens of the optical lens and the central curvature radius R4 of the image side surface of the second lens of the optical lens satisfy: |R3 / R4|≤1. Satisfying the condition, the object side surface of the second lens is more concave to the image side surface, which can correct the aberration caused by the concave object side surface of the first lens to the image side surface, and improve the resolution capability. Preferably, |R3 / R4|≤0.95.

[0136] In the embodiment, the central distance T12 from the image side surface of the first lens to the object side surface of the second lens of the optical lens and the total optical length of the optical lens, i.e. the central distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens satisfy: T12 / TTL≥0.1. Satisfying the condition, the distance between the first lens and the second lens is small, which makes the light near the stop transition smoothly and is beneficial to improve the image quality. Preferably, T12 / TTL≥0.12.

[0137] In the embodiment, the total optical length of the optical lens, i.e. the central distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens and the total focal length value F of the optical lens satisfy: TTL / F≤15. Satisfying the condition, the length of the optical lens can be effectively limited to realize miniaturization. Preferably, TTL / F≤14.

[0138] In the embodiment, the focal length value F1 of the first lens and the total focal length value F of the optical lens satisfy: |F1 / F|≤4. Satisfying the condition, the focal length of the first lens is limited to meet the long back focus requirement and is beneficial to assembly. Preferably, |F1 / F|≤3.5.

[0139] In the embodiment, the focal length value F3 of the third lens and the total focal length value F of the optical lens satisfy: 2.5≤|F3 / F|≤8. The third lens is double convex, which can control the light trend between the second lens and the fourth lens, reduce the aberration caused by the large-angle light entering through the second lens, and make the structure between lenses compact at the same time, which is beneficial to miniaturization. Preferably, 3≤|F3 / F|≤7.

[0140] In the embodiment, the focal length value F4 of the fourth lens and the overall focal length value F of the optical lens satisfy: |F4 / F|≤6. Satisfying the condition, the focal length of the fourth lens is reasonable, the fourth lens has positive refractive power, light converges, and is beneficial to realize large aperture, and the total length of the lens can be shortened. Preferably, |F4 / F|≤5.

[0141] In the embodiment, the focal length value F5 of the fifth lens and the overall focal length value F of the optical lens satisfy: |F5 / F|≤6. Satisfying the condition, the focal length of the fifth lens is reasonable, which is beneficial to the smooth transition of the optical system, and at the same time, in combination with the fourth lens, the total length of the optical lens can be shortened. Preferably, |F5 / F|≤5.

[0142] In the embodiment, the focal length value F6 of the sixth lens and the overall focal length value F of the optical lens satisfy: 0≤F6 / F≤15. In this way, the focal length of the sixth lens is reasonable, which ensures that the sixth lens has positive refractive power, is beneficial to light convergence, and is beneficial to realize small CRA. Preferably, 0≤F6 / F≤14.

[0143] In the embodiment, the focal length value F7 of the seventh lens and the overall focal length value F of the optical lens satisfy: 0≤F7 / F≤16. In this way, the focal length of the seventh lens is reasonable, which ensures that the seventh lens has positive refractive power, is beneficial to light convergence, and is beneficial to realize small CRA. Preferably, 0≤F7 / F≤15.

[0144] In the embodiment, the focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: |F6 / F7|≤3. Satisfying the condition, the focal length of the sixth lens and the seventh lens is close, which is beneficial to reduce the sensitivity of the lens. Preferably, |F6 / F7|≤2.8.

[0145] In the embodiment, the central curvature radius R2 of the image side surface of the first lens of the optical lens and the central curvature radius R3 of the object side surface of the second lens of the optical lens satisfy: |(|R2|-|R3|) / (|R2|+|R3|)|≤0.3. Satisfying the condition, the aberration of the optical system can be corrected, and when the light emitted from the first lens is incident on the object side surface of the second lens, the incident light is relatively gentle, thereby reducing the tolerance sensitivity of the optical system. Preferably, |(|R2|-|R3|) / (|R2|+|R3|)|≤0.25.

[0146] In the embodiment, the maximum value dn of the thickness of the first lens to the seventh lens and the minimum value dm of the thickness of the first lens to the seventh lens satisfy: dn / dm≤4. Satisfying the condition, the thickness of the lens is uniform, the effect of each lens is stable, the change of light at high and low temperatures is small, and the temperature performance is good. Preferably, dn / dm≤3.8.

[0147] In the embodiment, the arctan(1 / K(R2)) of the image side of the first lens of the optical lens satisfies: arctan(1 / K(R2))≥45, wherein K is the lens edge slope of the image side of the first lens of the optical lens at the maximum field of view angle, and R2 is the central curvature radius of the image side of the first lens. The image side of the first lens has a large angle, which is beneficial to the rapid focusing of the large-angle peripheral light entering through the first lens and improves the imaging quality. Preferably, arctan(1 / K(R2))≥48.

[0148] In the embodiment, the F / EPD of the optical lens satisfies: F / EPD≤1.4. Satisfying the condition formula, a larger light flux is realized under the premise of ensuring a small FNO, and a large aperture is ensured. Preferably, F / EPD≤1.3.

[0149] In the embodiment, the TTL / DMAX of the optical lens satisfies: TTL / DMAX≤7. A smaller TTL / DMAX makes the entire optical system more compact, which is beneficial to ensuring miniaturization. Preferably, TTL / DMAX≤6.

[0150] In the embodiment, the R3 and R4 of the second lens of the optical lens satisfy: -25≤1 / (1 / R3-1 / R4)≤-10. Satisfying the condition formula makes the R values of the two surfaces of the second lens in this range, which is beneficial to realizing the characteristics of a large aperture. Preferably, -23≤1 / (1 / R3-1 / R4)≤-13.

[0151] In the embodiment, the F2 / F of the second lens of the optical lens satisfies: F2 / F≥1. The refractive power of the second lens is positive, which is beneficial to the convergence of light and is beneficial to increasing the aperture. Preferably, F2 / F≥5.

[0152] In the embodiment, the R3, R4, ND2, and T2 of the second lens of the optical lens satisfy: (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND2*R3*R4)≥0. Satisfying the condition formula makes the focal length of the second lens positive, which is beneficial to converging light and is beneficial to realizing a large aperture. Preferably, (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND2*R3*R4)≥0.001.

[0153] In this embodiment, the effective aperture DL7 of the image-side surface of the seventh lens, the optical back focal length of the optical lens (i.e., the distance BFL from the center of the image-side surface of the last lens to the center of the imaging plane), and the image height H corresponding to the maximum field of view of the optical lens satisfy the following condition: 4 ≤ DL7 * BFL / H ≤ 15. Satisfying this condition ensures a long back focal length under the same imaging plane and image height, which is beneficial for achieving a small CRA (Cost Reduction Aspect Ratio). Preferably, 5 ≤ DL7 * BFL / H ≤ 13.

[0154] In this embodiment, the effective aperture DL7 of the image-side surface of the seventh lens and the image height H corresponding to the maximum field of view of the optical lens satisfy the condition: 0.5 ≤ DL7 / H ≤ 5. Satisfying this condition, under the same imaging surface and image height, a larger aperture on the image-side surface of the seventh lens is beneficial for the principal ray to exit parallel onto the imaging surface, thus facilitating the realization of a small CRA (Current Radiation Aspect Ratio). Preferably, 0.8 ≤ DL7 / H ≤ 4.

[0155] In this embodiment, the aperture diameter DGL and the total focal length F of the optical lens satisfy the condition: 2 ≤ DGL / F. A larger ratio between the aperture diameter DGL and the total focal length F ensures a larger aperture for the optical lens. Preferably, 2.1 ≤ DGL / F.

[0156] Example 2

[0157] like Figures 1 to 14 As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens along the optical axis from the object side to the image side. The first lens has negative optical power; the second lens has positive optical power; the third lens has positive optical power; the fourth lens has positive optical power; the fifth lens has negative optical power; the sixth lens has positive optical power; and the seventh lens has positive optical power. The total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens to the center of the imaging plane of the optical lens, satisfies the following condition with respect to the total focal length F of the optical lens: TTL / F ≤ 15.

[0158] The first lens has negative focal power, which is beneficial to diverging light rays, makes the light rays after the first lens transition smoothly, and at the same time makes the large-angle light rays enter the first lens as much as possible to improve the illumination; it is more beneficial to the reduction of the optical path of the rear light rays to realize a short TTL, ensure miniaturization, and increase the light throughput. The second lens has positive focal power, which makes the light rays diverged by the first lens smoothly enter the rear; at the same time, it is beneficial to correcting high-order aberrations, and more helpful to reducing the attenuation degree of the relative illumination of the optical lens, realizing high energy. Since the second lens has positive focal power, it is beneficial to the convergence of light rays, and is beneficial to realizing the characteristics of a large aperture. The third lens has positive focal power, which is more beneficial to the third lens for better convergence of light rays, realizing higher energy collection. The fourth lens has positive focal power, when the object side and the image side of the fourth lens are both convex, the spherical aberration introduced by the front lens of the fourth lens can be compensated, further correcting the aberration generated by the front lens group, and at the same time making the light rays converge again, that is, it can increase the aperture of the optical lens, and also can shorten the total length of the lens, realizing miniaturization. When the object side of the fourth lens is concave and the image side is convex, it is a meniscus lens, which can converge the light beam, increase the aperture of the lens, and also make the optical system have a relatively short total length of the system, ensuring miniaturization.

[0159] The fifth lens has negative focal power, the object side surface of the fifth lens is concave, the image side surface of the fifth lens is convex, and the difference between the two surface angles is large, which can better emit the light emitted by the fourth lens, realize higher energy collection, and the concave-convex lens has a large contact area with the mechanism plane during assembly, the lens tilt is less sensitive, and the lens tilt is less sensitive, which is beneficial to assembly, thereby reducing the cost. The sixth lens has positive focal power, at least one of the object side surface and the image side surface of the sixth lens is convex, when the object side surface of the sixth lens is concave and the image side surface is convex, the CRA can be reduced, the image side surface of the sixth lens is convex and the image side surface angle of the sixth lens is small, which ensures that the light emitted from the sixth lens is incident on the object side surface of the seventh lens, and the incident light is relatively flat, thereby reducing the tolerance sensitivity of the optical system. When the object side surface and the image side surface of the sixth lens are both convex, it is beneficial to reduce the CRA. The seventh lens has positive focal power, at least one of the object side surface and the image side surface of the seventh lens is convex, when the seventh lens is a convex object side surface and a concave image side surface, it is beneficial to the light entering the imaging surface, and it is beneficial to improve the resolving power, and the various aberrations of the optical system are fully corrected, and under the premise of compact structure, the resolution, optimization of distortion, CRA and other optical performances can be improved. When the object side surface and the image side surface of the seventh lens are both convex, it is beneficial to reduce the CRA and reduce the optical performance such as distortion. When the seventh lens is a convex object side surface and a concave image side surface, it is beneficial to the light entering the image surface, improves the resolving power, improves the resolution, and reduces the optical performance such as distortion. By reasonably constraining the total length of the optical lens, that is, the ratio between the center distance TTL of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens and the focal length F of the whole optical lens, the length of the optical lens can be effectively limited, and miniaturization can be realized. Preferably, TTL / F≤14.

[0160] In addition, the optical lens of the present application also has the advantages of high resolution, wide angle, good temperature performance, miniaturization, large aperture and small FNO, small CRA, long back focal length, easy assembly, simple structure and low cost. In the present embodiment, the object side surface of the first lens is convex, and the image side surface of the first lens is concave. Such arrangement is beneficial to the sliding of water droplets in practical application, and realizes higher energy collection. The first lens preferably uses high refractive index material, which is beneficial to the reduction of the front aperture and the improvement of the imaging quality.

[0161] In the present embodiment, the object side surface of the second lens is concave, and the image side surface of the second lens is convex. At the same time, the second lens has positive focal power, so that the light diverged by the first lens can smoothly enter the rear; at the same time, it is beneficial to correct high-order aberration, and more helpful to reduce the attenuation degree of relative luminance of the optical lens, realize high energy, because the second lens has positive focal length, it is beneficial to the convergence of light, and it is beneficial to realize the characteristics of large aperture.

[0162] In the embodiment, the object side surface of the third lens is convex, and the image side surface of the third lens is convex. The object side surface of the third lens is convex, and the image side surface of the third lens is convex, which is beneficial to balance the pressure of the front and rear lenses, make the light trend transition smoothly, enter the rear optical system smoothly, relieve the pressure of the rear lens, be beneficial to the reduction of the rear aperture, make the lens size uniform, and further make the optical lens more compact. Meanwhile, the third lens is a double-convex lens, which can control the light trend between the second lens and the fourth lens, reduce the aberration caused by the large-angle light entering through the second lens, and make the structure between the adjacent lenses compact, thereby ensuring the miniaturization of the optical lens.

[0163] In the embodiment, the object side surface of the fourth lens is convex, and the image side surface of the fourth lens is convex. The fourth lens is a double-convex lens with positive focal power, which can compensate for the spherical aberration introduced by the front lens, further correct the aberration generated by the front lens group, and make the light beam converge again, thereby increasing the aperture of the optical lens and shortening the total length of the optical lens to ensure miniaturization.

[0164] In the embodiment, the object side surface of the fourth lens is concave, and the image side surface of the fourth lens is convex. The fourth lens is a meniscus lens with positive focal power, which can make the light beam converge again, thereby increasing the aperture of the optical lens and making the optical system have a relatively short total length.

[0165] In the embodiment, the object side surface of the fifth lens is concave, and the image side surface of the fifth lens is convex. Such arrangement has a larger contact area with the mechanism plane in assembly, is less sensitive to lens tilt, and has a larger difference in the two face opening angles, better emits the light entering from the fourth lens, and realizes higher energy collection.

[0166] In the embodiment, the object side surface of the sixth lens is concave, and the image side surface of the sixth lens is convex. The sixth lens is a positive focal length lens, which has a convex image side surface facing the image side while reducing the CRA, and the image side surface opening angle of the sixth lens is small, so that when the light emitted from the sixth lens enters the object side surface of the seventh lens, the incident light is relatively smooth, thereby reducing the tolerance sensitivity of the optical system.

[0167] In the embodiment, the object side surface of the sixth lens is convex, and the image side surface of the sixth lens is convex. The sixth lens is a double-convex lens, which is a positive focal length lens and is beneficial to reducing the CRA.

[0168] In the embodiment, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is concave. The seventh lens is a meniscus lens, which is beneficial to the light entering the imaging surface gently and improving the resolving power. Meanwhile, various aberrations of the optical system are fully corrected, and the resolution, the distortion, the CRA and other optical performances are improved under the premise of compact structure.

[0169] In the embodiment, the object side surface of the seventh lens is convex, and the image side surface of the seventh lens is convex. The seventh lens is a double convex lens, which is beneficial to reducing the CRA and the distortion and other optical performances.

[0170] In the embodiment, the object side surface of the seventh lens is concave, and the image side surface of the seventh lens is convex. The seventh lens is a meniscus lens, which is beneficial to the light entering the imaging surface gently, improving the resolving power, improving the resolution, reducing the CRA, reducing the distortion and other optical performances.

[0171] In the embodiment, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens. This arrangement is beneficial to effectively converging the light entering the optical system and reducing the aperture of the lens in the optical system.

[0172] In the embodiment, the second lens is an aspherical lens, which can further improve the resolving power of the optical lens.

[0173] In the embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. This arrangement can gently transition the light passing through the front lens to the rear optical system, reduce the total length of the optical lens, correct various aberrations of the optical system, improve the resolution, optimize the distortion, the CRA and other optical performances under the premise of compact structure. Meanwhile, the air gap between the fourth lens and the fifth lens can be reduced by arranging the cemented lens, the total length of the system is reduced, the assembly components between the fourth lens and the fifth lens are reduced, the process is reduced, the cost is reduced, the tolerance sensitivity problem of the lens unit caused by the assembly process is reduced, the light loss caused by reflection between the fourth lens and the fifth lens is reduced, the illumination is improved, the field curvature can be further reduced, and the off-axis point aberration of the system can be corrected.

[0174] In the embodiment, the total optical length of the optical lens, i.e., the distance from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens TTL, the image height H corresponding to the maximum field angle of the optical lens, and the maximum field angle FOV of the optical lens satisfy: TTL / H / FOV≤0.06. Satisfying this condition can effectively limit the length of the optical lens at a large angle, which is beneficial to miniaturization. Preferably, TTL / H / FOV≤0.05.

[0175] In the embodiment, a center curvature radius R1 of an object side surface of the first lens of the optical lens and a center curvature radius R2 of an image side surface of the first lens of the optical lens satisfy R1 / R2≥4. By reasonably setting the shape of the first lens, the two surface R value bending directions are consistent, and the difference is large, which is beneficial to the first lens to collect more light into the rear optical system, and to reduce the lens front end aperture and the volume, which is beneficial to improve the resolution while realizing miniaturization. Preferably, R1 / R2≥5.

[0176] In the embodiment, a maximum light passing aperture D of the object side surface of the first lens corresponding to the maximum field angle of the optical lens, an image height H corresponding to the maximum field angle of the optical lens, and an arc value θ corresponding to the maximum field angle of the optical lens satisfy D / H / θ≤2. Satisfying this condition is beneficial to ensure that the optical lens front end aperture is small and miniaturized. Preferably, D / H / θ≤1.7.

[0177] In the embodiment, an optical back focal length of the optical lens, i.e., a center distance BFL from the image side center of the last lens of the optical lens to the center of the imaging surface, and an optical total length of the optical lens, i.e., a center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy BFL / TTL≥0.07. Satisfying this condition ensures the back focal length on the basis of realizing miniaturization, which is beneficial to the assembly of the module. Preferably, BFL / TTL≥0.09.

[0178] In the embodiment, a focal length value F4 of the fourth lens and a focal length value F5 of the fifth lens satisfy |F4 / F5|≤1.5. Satisfying this condition makes the focal lengths of the fourth lens and the fifth lens similar, which is helpful for the smooth transition of light, is beneficial to correct chromatic aberration, improve image quality, and effectively improve lens thermal compensation. Preferably, |F4 / F5|≤1.3.

[0179] In the embodiment, a center curvature radius R3 of an object side surface of the second lens of the optical lens and a center curvature radius R4 of an image side surface of the second lens of the optical lens satisfy |R3 / R4|≤1. Satisfying this condition makes the object side surface of the second lens more concave to the image side surface, which can correct the aberration caused by the concave object side surface of the first lens to the object side surface, and improve the resolution capability. Preferably, |R3 / R4|≤0.95.

[0180] In the embodiment, a center distance T12 from the image side surface of the first lens to the object side surface of the second lens of the optical lens and an optical total length of the optical lens, i.e., a center distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy T12 / TTL≥0.1. Satisfying this condition makes the distance between the first lens and the second lens smaller, so that the light near the diaphragm smoothly transitions, which is beneficial to improve the image quality. Preferably, T12 / TTL≥0.12.

[0181] In the embodiment, the focal length value F1 of the first lens and the overall focal length value F of the optical lens satisfy: |F1 / F|≤4. Satisfying the condition, the focal length of the first lens is limited to meet the long back focal length requirement, which is beneficial to assembly. Preferably, |F1 / F|≤3.5.

[0182] In the embodiment, the focal length value F3 of the third lens and the overall focal length value F of the optical lens satisfy: 2.5≤|F3 / F|≤8. The third lens is double-convex, which can control the light path between the second lens and the fourth lens, reduce aberration caused by large-angle light entering through the second lens, and make the structure between lenses compact, which is beneficial to miniaturization. Preferably, 3≤|F3 / F|≤7.

[0183] In the embodiment, the focal length value F4 of the fourth lens and the overall focal length value F of the optical lens satisfy: |F4 / F|≤6. Satisfying the condition, the focal length of the fourth lens is reasonable, the fourth lens has positive refractive power, light converges, which is beneficial to realize large aperture and shorten the total length of the lens. Preferably, |F4 / F|≤5.

[0184] In the embodiment, the focal length value F5 of the fifth lens and the overall focal length value F of the optical lens satisfy: |F5 / F|≤6. Satisfying the condition, the focal length of the fifth lens is reasonable, which is beneficial to optical smooth transition, and can shorten the total length of the optical lens together with the fourth lens. Preferably, |F5 / F|≤5.

[0185] In the embodiment, the focal length value F6 of the sixth lens and the overall focal length value F of the optical lens satisfy: 0≤F6 / F≤15. In this way, the focal length of the sixth lens is reasonable, which ensures that the sixth lens has positive refractive power, is beneficial to light convergence, and is beneficial to realize small CRA. Preferably, 0≤F6 / F≤14.

[0186] In the embodiment, the focal length value F7 of the seventh lens and the overall focal length value F of the optical lens satisfy: 0≤F7 / F≤16. In this way, the focal length of the seventh lens is reasonable, which ensures that the seventh lens has positive refractive power, is beneficial to light convergence, and is beneficial to realize small CRA. Preferably, 0≤F7 / F≤15.

[0187] In the embodiment, the focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: |F6 / F7|≤3. Satisfying the condition, the focal length of the sixth lens and the seventh lens is close, which is beneficial to reduce lens sensitivity. Preferably, |F6 / F7|≤2.8.

[0188] In the embodiment, the center curvature radius R2 of the image side surface of the first lens of the optical lens and the center curvature radius R3 of the object side surface of the second lens of the optical lens satisfy: |(|R2|-|R3|) / (|R2|+|R3|)|≤0.3. Satisfying the condition formula, the aberration of the optical system can be corrected, and when the light rays emitted from the first lens are incident on the object side surface of the second lens, the incident light rays are relatively gentle, thereby reducing the tolerance sensitivity of the optical system. Preferably, |(|R2|-|R3|) / (|R2|+|R3|)|≤0.25.

[0189] In the embodiment, the maximum value dn of the thickness in the first lens to the seventh lens and the minimum value dm of the thickness in the first lens to the seventh lens satisfy: dn / dm≤4. Satisfying the condition formula makes the lens thickness uniform, so that the effect of each lens is stable, which is helpful to reduce the change of light rays at high and low temperatures, and ensures the characteristics of good temperature performance. Preferably, dn / dm≤3.8.

[0190] In the embodiment, the opening angle arctan(1 / K(R2)) of the image side surface of the first lens of the optical lens at the maximum field of view angle satisfies: arctan(1 / K(R2))≥45, wherein K is the lens edge slope of the first lens of the optical lens at the maximum field of view angle of the image side surface, and R2 is the center curvature radius of the image side surface of the first lens. The image side surface of the first lens has a large opening angle, which is beneficial to quickly focus the large-angle peripheral light rays entering through the first lens and improve the imaging quality. Preferably, arctan(1 / K(R2))≥48.

[0191] In the embodiment, the total focal length value F of the optical lens and the entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.4. Satisfying the condition formula, on the premise of ensuring small FNO, a larger light flux is realized to ensure a large aperture. Preferably, F / EPD≤1.3.

[0192] In the embodiment, the total optical length of the optical lens, i.e., the distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens and the maximum half aperture DMAX in the first lens to the seventh lens satisfy: TTL / DMAX≤7. If TTL / DMAX is too small, the entire optical system is more compact, which is beneficial to ensure miniaturization. Preferably, TTL / DMAX≤6.

[0193] In the embodiment, the central curvature radius R3 of the object side surface of the second lens of the optical lens and the central curvature radius R4 of the image side surface of the second lens of the optical lens satisfy: -25≤1 / (1 / R3-1 / R4)≤-10. Satisfying the condition formula, the R value of the two surfaces of the second lens in the range is conducive to realizing the feature of large aperture. Preferably, -23≤1 / (1 / R3-1 / R4)≤-13.

[0194] In the embodiment, the focal length value F2 of the second lens and the overall focal length value F of the optical lens satisfy: F2 / F≥1. The refractive power of the second lens is positive, which is conducive to the convergence of light rays and the increase of the aperture. Preferably, F2 / F≥5.

[0195] In the embodiment, the central curvature radius R3 of the object side surface of the second lens of the optical lens, the central curvature radius R4 of the image side surface of the second lens of the optical lens, the refractive index ND2 of the second lens and the central thickness T2 of the second lens satisfy: (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND1*R3*R4)≥0. Satisfying the condition formula, the focal length of the second lens is positive, which is conducive to the convergence of light rays and the realization of large aperture. Preferably, (ND2-1)*(1 / R3-1 / R4)+(ND2-1)2*T2 / (ND2*R3*R4)≥0.001.

[0196] In the embodiment, the effective clear aperture DL7 of the image side surface of the seventh lens, the optical back focus of the optical lens, i.e. the distance BFL from the center of the image side of the last lens of the optical lens to the center of the imaging surface, and the image height H corresponding to the maximum field angle of the optical lens satisfy: 4≤DL7*BFL / H≤15. Satisfying the condition formula, the back focal length is ensured under the condition of the same imaging surface and the same image height, which is conducive to realizing small CRA. Preferably, 5≤DL7*BFL / H≤13.

[0197] In the embodiment, the effective clear aperture DL7 of the image side surface of the seventh lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤DL7 / H≤5. Satisfying the condition formula, when the clear aperture of the image side surface of the seventh lens is large under the condition of the same imaging surface and the same image height, the chief ray is parallel to the imaging surface, which is conducive to realizing small CRA. Preferably, 0.8≤DL7 / H≤4.

[0198] In the embodiment, the diaphragm aperture DGL and the overall focal length value F of the optical lens satisfy: 2≤DGL / F. Satisfying the condition formula, the larger the ratio between the diaphragm aperture DGL and the overall focal length value F of the optical lens, the larger the aperture of the optical lens. Preferably, 2.1≤DGL / F.

[0199] Optionally, the optical lens described above can further comprise a filter for correcting color deviation and / or a protective glass for protecting the photosensitive element located on the imaging surface.

[0200] The optical lens in the present application can adopt multiple lenses, for example, the seven lenses described above. The present application does not specifically limit the specific number of spherical lenses and aspherical lenses. When the imaging quality is emphasized, the number of aspherical lenses can be increased. The aspherical lens has the characteristic that the curvature is continuously changed from the center of the lens to the periphery of the lens. Unlike the spherical lens which has a constant curvature from the center of the lens to the periphery of the lens, the aspherical lens has a better curvature radius characteristic, which has the advantages of improving the distortion aberration and improving the astigmatism aberration. After the aspherical lens is adopted, the aberration that occurs during imaging can be eliminated as much as possible, thereby improving the imaging quality.

[0201] In the exemplary embodiments, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens can all be glass lenses. The optical lens made of glass can suppress the shift of the back focus of the optical lens with the change of temperature, so as to improve the system stability. At the same time, the use of glass material can avoid the imaging blur of the lens caused by the high and low temperature changes in the use environment, which affects the normal use of the lens. For example, the optical lens with all-glass design has a wide temperature range, which can maintain stable optical performance in the range of -40℃ to 105℃. Of course, in the application occasions with low temperature stability requirements, the first lens to the seventh lens in the optical lens can also be made of plastic. The optical lens made of plastic can effectively reduce the manufacturing cost. Of course, the first lens to the seventh lens in the optical lens can also be made of plastic and glass.

[0202] The present application also provides an electronic device comprising the optical lens described above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor device (CMOS). The electronic device can be a separate imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0203] However, those skilled in the art should understand that the number of lenses constituting the optical lens can be changed without departing from the technical solutions claimed by the present application, so as to obtain the various results and advantages described in the present application. For example, although the seven lenses are described as an example in the embodiments, the optical lens is not limited to comprising seven lenses. If necessary, the optical lens can further comprise other number of lenses.

[0204] The specific surface shapes and parameters of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0205] It is to be noted that any one of the following examples 1 to 14 is applicable to all embodiments of the present application.

[0206] Example 1

[0207] As shown in FIG. 1, it is a schematic view of the optical lens structure of example 1. Figure 1

[0208] As shown in FIG. 1, the optical lens sequentially comprises, from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9 and an imaging plane IMA. Figure 1 The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. The light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging plane IMA.

[0209] In this example, the total effective focal length F of the optical lens is 2.752 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.109 mm.

[0210] Table 1 shows the basic structure parameter table of the optical lens of example 1, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0211] Surf Radius Thickness Nd Vd 1 30.077 1.242 1.80 46.57 2 4.285 5.627 3 -4.670 3.622 1.69 31.16 4 -6.035 1.035 5 10.336 3.105 1.49 70.13 6 -11.227 0.269 STO Infinity 1.035 8 688.592 3.105 1.62 63.41 9 -5.077 1.449 1.92 20.88 10 -14.930 0.103 11 -1473.640 2.691 1.77 49.61 12 -14.809 0.103 13 8.773 2.070 1.77 49.61 14 14.947 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.529 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity Table 1

[0213]

[0214] ​​In example one, the second lens L2 is an aspherical lens, and S2 and S4 are aspherical surfaces. Of course, considering the image quality of the optical lens, the object side and the image side of any one of the first lens L1 to the seventh lens L7 can be aspherical surfaces, which can be selected according to actual conditions, and the surface shape of each aspherical lens can be defined by, but not limited to, the following aspherical surface formula:

[0215]

[0216] wherein x is the sag of the aspherical surface at a position along the optical axis at a height of h from the vertex of the aspherical surface; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the inverse of the curvature radius R in Table 1 above); k is the conic coefficient; conic; A, B, C, D, E are high-order coefficients. Table 2 below shows the conic coefficient k and the high-order coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in example one.

[0217] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -5.494E-02 -5.419E-05 1.637E-05 -5.276E-06 2.329E-07 1.307E-09 4 -7.574E-01 2.675E-04 -5.993E-05 6.064E-06 -3.157E-07 6.694E-09

[0218] Table 2

[0219] Example two

[0220] As shown in Figure 2 , an optical lens of example two of the present application is described. In this example and the following examples, for the sake of brevity, some similar descriptions as example one will be omitted. Figure 2 A schematic diagram of the optical lens structure of example two is shown.

[0221] As shown in Figure 2 , the optical lens includes, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0222] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is convex. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is concave, and the image side surface S12 of the sixth lens is convex. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is concave. Light from an object sequentially passes through the surfaces S1 to S18 and is finally imaged on the image plane IMA.

[0223] In this example, the total effective focal length F of the optical lens is 2.748 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.058 mm.

[0224] Table 3 shows the basic structural parameter table of the optical lens of Example Two, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0225]

[0226]

[0227] Table 3

[0228] The following Table 4 shows the conic coefficient k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Two.

[0229] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -3.765E-02 -4.272E-05 1.703E-05 -5.183E-06 2.449E-07 2.834E-10 4 -6.931E-01 3.155E-04 -6.192E-05 6.491E-06 -3.441E-07 7.376E-09

[0230] Table 4

[0231] Example Three

[0232] As Figure 3 shown, the optical lens of Example Three of the present application is described. Figure 3 A schematic diagram of the optical lens structure of Example Three is shown.

[0233] As Figure 3As shown, the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0234] The first lens L1 has a negative focal power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive focal power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive focal power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive focal power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative focal power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive focal power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive focal power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. Light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface IMA.

[0235] In this example, the total effective focal length F of the optical lens is 2.750 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.081 mm.

[0236] Table 5 shows the basic structural parameter table of the optical lens of Example Three, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0237]

[0238]

[0239] Table 5

[0240] The following Table 6 shows the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Three.

[0241] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -5.084E-02 -1.925E-05 1.675E-05 -6.942E-06 3.107E-07 1.011E-09 4 -6.806E-01 3.081E-04 -6.270E-05 6.313E-06 -3.485E-07 7.860E-09

[0242] Table 6

[0243] Example Four

[0244] As Figure 4 shown, the optical lens of Example Four of the present application is described. Figure 4 A schematic diagram showing the structure of the optical lens of Example Four is shown.

[0245] As shown in Figure 4 the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0246] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. Light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0247] In this example, the total effective focal length F of the optical lens is 2.750 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.082 mm.

[0248] Table 7 shows the basic structural parameter table of the optical lens of Example Four, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0249] Surf Radius Thickness Nd Vd 1 29.917 1.242 1.80 46.57 2 4.301 5.558 3 -4.686 3.622 1.69 31.16 4 -6.027 1.035 5 10.590 3.105 1.49 70.13 6 -11.765 0.269 STO Infinity 1.035 8 800.000 3.105 1.62 63.41 9 -5.082 1.449 1.92 20.88 10 -14.407 0.103 11 316.000 2.691 1.77 49.61 12 -14.819 0.103 13 8.865 2.070 1.77 49.61 14 14.942 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.571 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0250] Table 7

[0251] The following Table 8 shows the conic coefficient k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example Four.

[0252] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -5.521E-02 -1.268E-05 1.708E-05 -6.930E-06 2.869E-07 8.731E-10 4 -6.771E-01 3.054E-04 -6.185E-05 6.305E-06 -3.501E-07 7.802E-09

[0253] Table 8

[0254] Example Five

[0255] As shown in Figure 5 the optical lens of Example Five of the present application is described. Figure 5 a schematic diagram of the optical lens structure of Example Five is shown.

[0256] As shown in Figure 5 the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0257] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. Light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0258] In this example, the total effective focal length F of the optical lens is 2.753 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.090 mm.

[0259] Table 9 shows the basic structural parameter table of the optical lens of Example Five, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0260] Surf Radius Thickness Nd Vd 1 29.909 1.242 1.80 46.57 2 4.298 5.563 3 -4.672 3.622 1.69 31.16 4 -6.010 1.035 5 10.559 3.105 1.49 70.13 6 -11.457 0.269 STO Infinity 1.035 8 -525.467 3.105 1.62 63.41 9 -5.089 1.449 1.92 20.88 10 -14.389 0.103 11 316.000 2.691 1.77 49.61 12 -14.894 0.103 13 8.830 2.070 1.77 49.61 14 14.964 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.575 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0261] Table 9

[0262] The following Table 10 shows the conic coefficient k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example Five.

[0263] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -4.100E-02 -3.403E-05 1.597E-05 -6.482E-06 4.118E-07 -6.403E-09 4 -6.630E-01 2.931E-04 -6.079E-05 6.423E-06 -3.510E-07 7.686E-09

[0264] Table 10

[0265] Example Six

[0266] As shown in Figure 6 the optical lens of Example Six of the present application is described. Figure 6 a schematic diagram of the optical lens structure of Example Six is shown.

[0267] As shown in FIG. 6, the optical lens sequentially includes, from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA. Figure 6

[0268] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a concave surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a concave surface. The light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging surface IMA.

[0269] In this example, the total effective focal length F of the optical lens is 2.753 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 30.088 mm.

[0270] Table 11 shows the basic structure parameter table of the optical lens of Example Six, wherein the units of the radius of curvature Radius and the thickness Thickness / Distance are millimeters (mm).

[0271]

[0272]

[0273] Table 11

[0274] The following Table 12 shows the conic constant k and the high-order term coefficients A, B, C, D, and E of the aspherical lens surfaces S3 and S4 that can be used in Example Six.

[0275] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -3.970E-02 -3.595E-05 1.585E-05 -6.554E-06 4.154E-07 -5.574E-09 4 -6.630E-01 2.934E-04 -6.121E-05 6.425E-06 -3.501E-07 7.751E-09

[0276] Table 12

[0277] Example Seven

[0278] As shown in FIG. 6, the optical lens sequentially includes, from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA. Figure 7 ​As shown, the optical lens of the present application example seven is described. Figure 7 A schematic diagram of the optical lens structure of example seven is shown.

[0279] As shown, the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA. Figure 7 The first lens L1 has negative refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is convex. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is concave, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is convex. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is convex. Light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0280] In the present example, the total effective focal length F of the optical lens is 2.751 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 32.336 mm.

[0281] Table 13 shows the basic structure parameter table of the optical lens of example seven, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0282]

[0283]

[0284]

[0285] Table 13

[0286] The following table 14 shows the conic constant k and each high-order term coefficient A, B, C, D, E of the aspherical lens surface S3 and S4 that can be used in example seven.

[0287] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -4.341E-02 3.201E-05 1.634E-05 -4.860E-06 1.745E-07 1.025E-08 4 -6.340E-01 1.426E-04 -7.867E-05 9.192E-06 -5.742E-07 1.353E-08

[0288] Table 14

[0289] Example eight​

[0290] like Figure 8 As shown, an optical lens of Example 8 of this application is described. Figure 8 A schematic diagram of the optical lens structure of Example 8 is shown.

[0291] like Figure 8 As shown, the optical lens, from the object side to the image side, includes the following components in sequence: first lens L1, second lens L2, third lens L3, aperture stop STO, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, filter L8, protective glass L9, and imaging surface IMA.

[0292] The first lens L1 has negative optical power, its object-side surface S1 is convex, and its image-side surface S2 is concave. The second lens L2 has positive optical power, its object-side surface S3 is concave, and its image-side surface S4 is convex. The third lens L3 has positive optical power, its object-side surface S5 is convex, and its image-side surface S6 is convex. The fourth lens L4 has positive optical power, its object-side surface S8 is concave, and its image-side surface S9 is convex. The fifth lens L5 has negative optical power, its object-side surface S9 is concave, and its image-side surface S10 is convex. The sixth lens L6 has positive optical power, its object-side surface S11 is convex, and its image-side surface S12 is convex. The seventh lens L7 has positive optical power, its object-side surface S13 is convex, and its image-side surface S14 is convex. Light from the object passes through surfaces S1 to S18 in sequence and is finally imaged onto the imaging surface IMA.

[0293] In this example, the total effective focal length F of the optical lens is 2.750mm, the maximum field of view (FOV) of the optical lens is 170.000°, and the total length (TTL) of the optical lens is 32.253mm.

[0294] Table 15 shows the basic structural parameters of the optical lens of Example 8, where the units for radius of curvature (Radius) and thickness (Thickness / Distance) are millimeters (mm).

[0295] Surf Radius Thickness Nd Vd 1 27.744 1.242 1.80 46.57 2 4.325 5.548 3 -4.217 3.622 1.69 31.16 4 -5.469 1.035 5 13.657 3.105 1.49 70.13 6 -11.652 0.269 STO Infinity 1.320 8 -426.743 4.030 1.62 63.41 9 -5.308 1.500 1.92 20.88 10 -16.035 0.103 11 316.000 2.691 1.77 49.61 12 -18.160 0.103 13 13.561 3.000 1.77 49.61 14 -50.249 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.561 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0296] Table 15

[0297] Table 16 below shows the conic coefficient k and the coefficients A, B, C, D, and E of each higher-order term that can be used for the aspherical lens surfaces S3 and S4 in Example 8.

[0298] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -2.861E-02 -1.008E-05 1.676E-05 -2.165E-06 -1.479E-07 2.512E-08 4 -6.214E-01 1.327E-04 -7.672E-05 9.267E-06 -5.728E-07 1.328E-08

[0299] Table 16

[0300] Example 9

[0301] As shown in Figure 9 , the optical lens of example nine is described. Figure 9 The schematic diagram of the optical lens structure of example nine is shown.

[0302] As shown in Figure 9 , the optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0303] The first lens L1 has a negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has a positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has a positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has a negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has a positive refractive power, the object side surface S11 of the sixth lens is a convex surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has a positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a convex surface. The light from the object sequentially passes through each surface S1 to S18 and is finally imaged on the imaging surface IMA.

[0304] In this example, the total effective focal length F of the optical lens is 2.737 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total length TTL of the optical lens is 31.844 mm.

[0305] Table 17 shows the basic structure parameter table of the optical lens of example nine, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0306] Surf Radius Thickness Nd Vd 1 27.544 1.242 1.80 46.57 2 4.330 5.532 3 -4.222 3.622 1.69 31.16 4 -5.448 1.035 5 13.068 3.105 1.49 70.13 6 -11.678 0.269 STO Infinity 1.347 8 100.000 4.073 1.62 63.41 9 -5.283 1.500 1.92 20.88 10 -16.029 0.103 11 269.961 2.691 1.77 49.61 12 -18.573 0.103 13 13.813 3.000 1.77 49.61 14 -48.516 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.097 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0307] Table 17

[0308] The following table 18 shows the conic coefficient k and each high-order term coefficient A, B, C, D, E of the aspherical lens surface S3 and S4 that can be used in example nine.

[0309] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -3.786E-02 1.967E-05 1.658E-05 -2.695E-06 -7.295E-08 2.207E-08 4 -6.666E-01 1.774E-04 -8.274E-05 9.267E-06 -5.482E-07 1.230E-08

[0310] Table 18

[0311] Example ten

[0312] As shown in Table 10, an optical lens of Example 9 is described. Figure 10 Figure 10 A schematic view of the optical lens structure of Example 9 is shown.

[0313] As shown in Table 10, an optical lens of Example 9 is described. Figure 10

[0314] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is convex, and the image side surface S2 of the first lens is concave. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is concave, and the image side surface S4 of the second lens is convex. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is convex, and the image side surface S6 of the third lens is convex. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is convex, and the image side surface S9 of the fourth lens is convex. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is concave, and the image side surface S10 of the fifth lens is convex. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is convex, and the image side surface S12 of the sixth lens is convex. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is convex, and the image side surface S14 of the seventh lens is convex. Light from the object sequentially passes through the surfaces S1 to S18 and is finally imaged on the imaging plane IMA.

[0315] In the present example, the total effective focal length F of the optical lens is 2.747 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total track length TTL of the optical lens is 32.317 mm.

[0316] Table 19 shows the basic structure parameter table of the optical lens of Example 9, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0317]

[0318]

[0319] Table 19

[0320] The following Table 20 shows the conic constant k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example 9.

[0321] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -3.203E-02 -4.567E-05 2.373E-05 -3.852E-06 -7.368E-08 2.446E-08 4 -6.106E-01 2.566E-04 -8.041E-05 9.079E-06 -5.240E-07 1.158E-08

[0322] ​​Table 20

[0323] Example Eleven

[0324] As shown in Table 20, an optical lens of the present application is described in Example Eleven. Figure 11 A schematic view of the optical lens structure of Example Eleven is shown in FIG. 20. Figure 11 A schematic view of the optical lens structure of Example Eleven is shown in FIG. 20.

[0325] As shown in Table 20, an optical lens of the present application is described in Example Eleven. Figure 11 The optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0326] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a convex surface. Light from an object passes through each surface S1-S18 in order and is ultimately imaged on the imaging surface IMA.

[0327] In the present example, the total effective focal length F of the optical lens is 2.763 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total track length TTL of the optical lens is 32.384 mm.

[0328] Table 21 shows a basic structure parameter table of the optical lens of Example Eleven, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0329]

[0330]

[0331] Table 21

[0332] The following Table 22 shows the conic constant k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example Eleven.

[0333] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -2.788E-02 -7.016E-05 2.346E-05 -3.929E-06 -7.998E-08 2.393E-08 4 -6.095E-01 2.560E-04 -8.059E-05 9.071E-06 -5.243E-07 1.158E-08

[0334] Table 22

[0335] Example Twelve

[0336] As shown in Table 22, an optical lens of the present application is described in Example Twelve. Figure 12 A schematic view of the optical lens structure of Example Twelve is shown. Figure 12 As shown in Table 22, an optical lens of the present application is described in Example Twelve.

[0337] As shown in Table 22, an optical lens of the present application is described in Example Twelve. Figure 12 The optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0338] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is a convex surface, and the image side surface S14 of the seventh lens is a convex surface. Light from the object passes through each surface S1-S18 in order and is ultimately imaged on the imaging surface IMA.

[0339] In the present example, the total effective focal length F of the optical lens is 2.766 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total track length TTL of the optical lens is 32.381 mm.

[0340] Table 23 shows the basic structure parameter table of the optical lens of Example Twelve, wherein the units of the radius of curvature Radius and the thickness Thickness / distance are millimeters (mm).

[0341] Surf Radius Thickness Nd Vd 1 28.955 1.242 1.80 46.57 2 4.320 5.652 3 -4.186 3.622 1.69 31.16 4 -5.523 1.035 5 14.989 3.105 1.49 70.13 6 -10.714 0.269 STO Infinity 1.221 8 115.103 3.949 1.62 63.41 9 -5.477 1.500 1.92 20.88 10 -16.781 0.103 11 -200.000 2.691 1.77 49.61 12 -19.248 0.103 13 14.875 3.000 1.77 49.61 14 -36.386 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 2.764 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0342] Table 23

[0343] The following Table 24 shows the conic constant k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example Twelve.

[0344] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -2.668E-02 -8.073E-05 2.331E-05 -3.954E-06 -7.777E-08 2.468E-08 4 -6.085E-01 2.555E-04 -8.077E-05 9.063E-06 -5.244E-07 1.160E-08

[0345] Table 24

[0346] Example Thirteen

[0347] As shown in Table 1, an optical lens of the present application is described in Example Thirteen. Figure 13 A schematic view of the optical lens structure of Example Thirteen is shown. Figure 13 A schematic view of the optical lens structure of Example Thirteen is shown.

[0348] As shown in Table 1, an optical lens of the present application is described in Example Thirteen. Figure 13 The optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0349] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a convex surface. Light from the object passes through each surface S1-S18 in order and is ultimately imaged on the imaging surface IMA.

[0350] In the present example, the total effective focal length F of the optical lens is 3.237 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total track length TTL of the optical lens is 33.293 mm.

[0351] Table 25 shows the basic structure parameter table of the optical lens of Example Thirteen, wherein the units of the radius of curvature Radius and the thickness / distance are millimeters (mm).

[0352] Surf Radius Thickness Nd Vd 1 249.933 1.242 1.80 46.57 2 5.273 5.652 3 -4.028 3.622 1.69 31.16 4 -5.191 1.035 5 24.329 3.105 1.49 70.13 6 -8.833 0.269 STO Infinity 1.221 8 62.194 3.949 1.62 63.41 9 -5.975 1.500 1.92 20.88 10 -14.021 0.103 11 -197.530 2.691 1.77 49.61 12 -16.680 0.103 13 -100.000 3.000 1.77 49.61 14 -25.059 1.000 15 Infinity 0.500 1.52 64.17 16 Infinity 3.676 17 Infinity 0.500 1.52 64.17 18 Infinity 0.125 IMA Infinity

[0353] Table 25

[0354] The following Table 26 shows the conic constant k and the respective high-order term coefficients A, B, C, D, E of the aspherical lens surfaces S3 and S4 that can be used in Example Thirteen.

[0355] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -1.429E-02 -1.215E-03 8.878E-05 -1.676E-06 9.029E-08 4.578E-08 4 -6.033E-01 3.017E-04 -6.190E-05 9.270E-06 -5.145E-07 1.132E-08

[0356] Table 26

[0357] Example Fourteen

[0358] As shown in Table 26, an optical lens of the present application is described. Figure 14 A schematic view of the optical lens structure of Example Fourteen is shown. Figure 14 As shown in Table 26, an optical lens of the present application is described.

[0359] As shown in Table 26, an optical lens of the present application is described. Figure 14 The optical lens comprises, in order from the object side to the image side: a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter L8, a protective glass L9, and an imaging surface IMA.

[0360] The first lens L1 has negative refractive power, the object side surface S1 of the first lens is a convex surface, and the image side surface S2 of the first lens is a concave surface. The second lens L2 has positive refractive power, the object side surface S3 of the second lens is a concave surface, and the image side surface S4 of the second lens is a convex surface. The third lens L3 has positive refractive power, the object side surface S5 of the third lens is a convex surface, and the image side surface S6 of the third lens is a convex surface. The fourth lens L4 has positive refractive power, the object side surface S8 of the fourth lens is a convex surface, and the image side surface S9 of the fourth lens is a convex surface. The fifth lens L5 has negative refractive power, the object side surface S9 of the fifth lens is a concave surface, and the image side surface S10 of the fifth lens is a convex surface. The sixth lens L6 has positive refractive power, the object side surface S11 of the sixth lens is a concave surface, and the image side surface S12 of the sixth lens is a convex surface. The seventh lens L7 has positive refractive power, the object side surface S13 of the seventh lens is a concave surface, and the image side surface S14 of the seventh lens is a convex surface. Light from the object passes through the surfaces S1-S18 in order and is ultimately imaged on the imaging surface IMA.

[0361] In the present example, the total effective focal length F of the optical lens is 3.223 mm, the maximum field of view FOV of the optical lens is 170.000°, and the total track length TTL of the optical lens is 33.175 mm.

[0362] Table 27 shows the basic structure parameter table of the optical lens of Example Fourteen, wherein the units of the radius of curvature Radius and the thickness / distance are millimeters (mm).

[0363]

[0364]

[0365] Table 27

[0366] The following Table 28 shows the conic constant k and the respective higher order coefficients A, B, C, D, E for the aspherical lens surfaces S3 and S4 used in Example XIV.

[0367] Order of the higher order term / 4 6 8 10 12 Surf K A B C D E 3 -1.429E-02 -9.379E-04 8.878E-05 -1.676E-06 9.029E-08 3.640E-08 4 -6.033E-01 3.017E-04 -6.839E-05 9.270E-06 -5.145E-07 1.132E-08

[0368] In summary, Examples I to XIV satisfy the relationships shown in Table 29, respectively.

[0369]

[0370]

[0371] Table 29

[0372] Table 30 gives the effective focal length F of the optical lens, the effective focal lengths Fl to F6 of the respective lenses, etc. (in mm) for Examples I to XIV.

[0373]

[0374]

[0375]

[0376] Table 30

[0377] It is apparent that the above-described embodiments are merely some, but not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort, which are derived from the embodiments of the present application, should belong to the scope of the present application.

[0378] It is to be noted that the terms used in the specification of the present application are only for the purpose of describing particular embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, the singular forms are intended to include the plural forms unless the context clearly indicates otherwise, and it will be further understood that the terms "comprising" and / or "including," when used herein, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof.

[0379] It should be noted that the terms "first", "second", and the like, used in the specification of the present application, are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged, where appropriate, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein.

[0380] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. An optical lens characterized in that, The optical lens is composed of seven lenses with optical power, which are sequentially arranged along the optical axis from the object side to the image side as follows: a first lens having negative optical power, the object side surface of the first lens being convex, and the image side surface of the first lens being concave; a second lens having positive optical power, the object side surface of the second lens being concave, and the image side surface of the second lens being convex; a third lens having positive optical power, the object side surface of the third lens being convex, and the image side surface of the third lens being convex; a fourth lens having positive optical power, the image side surface of the fourth lens being convex; a fifth lens having negative optical power, the object side surface of the fifth lens being concave, and the image side surface of the fifth lens being convex; a sixth lens having positive optical power, the image side surface of the sixth lens being convex; a seventh lens having positive optical power, at least one of the object side surface and the image side surface of the seventh lens being convex; the focal length value F3 of the third lens and the overall focal length value F of the optical lens satisfy: 2.5≤|F3 / F|≤8; and the focal length value F7 of the seventh lens and the overall focal length value F of the optical lens satisfy: 0≤F7 / F≤16.

2. The optical lens according to claim 1, wherein: the object side surface of the fourth lens is convex or concave; the object side surface of the sixth lens is concave or convex; the object side surface of the seventh lens is convex, the image side surface of the seventh lens is concave; or the object side surface of the seventh lens is convex, the image side surface of the seventh lens is convex; or the object side surface of the seventh lens is concave, the image side surface of the seventh lens is convex.

3. The optical lens of claim 1, wherein, The optical lens further comprises a diaphragm arranged between the third lens and the fourth lens.

4. The optical lens of claim 1, wherein, The second lens is an aspheric lens.

5. The optical lens of claim 1, wherein, The fourth lens and the fifth lens are cemented to form a cemented lens.

6. The optical lens of any of claims 1 to 5, wherein, The optical total length of the optical lens, i.e., the distance TTL from the object side center of the first lens of the optical lens to the center of the imaging surface 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 FOV of the optical lens satisfy: TTL / H / FOV≤0.

06.

7. The optical lens of any of claims 1 to 5, wherein, The central curvature radius R1 of the object side surface of the first lens of the optical lens and the central curvature radius R2 of the image side surface of the first lens of the optical lens satisfy: 47.397≥R1 / R2≥4.

8. The optical lens of any of claims 1 to 5, wherein, The maximum light passing aperture D of the object side surface 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 radian value θ corresponding to the maximum field of view of the optical lens satisfy: 0.649≤D / H / θ≤2.

9. The optical lens of any of claims 1 to 5, wherein, An optical back focal length of the optical lens, i.e., a center distance BFL from a last lens of the optical lens to a center of an imaging surface, and an optical total track length of the optical lens, i.e., a center distance TTL from a center of an object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 0.174≥BFL / TTL≥0.

07.

10. The optical lens of any of claims 1 to 5, wherein, A focal length value F4 of the fourth lens and a focal length value F5 of the fifth lens satisfy: 0.712≤|F4 / F5|≤1.

5.

11. The optical lens of any of claims 1 to 5, wherein, A center curvature radius R3 of an object side of the second lens of the optical lens and a center curvature radius R4 of an image side of the second lens of the optical lens satisfy: 0.758≤|R3 / R4|≤1.

12. The optical lens of any of claims 1 to 5, wherein, A center distance T12 from an image side of the first lens to an object side of the second lens of the optical lens and the optical total track length of the optical lens, i.e., the center distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, satisfy: 0.187≥T12 / TTL≥0.

1.

13. The optical lens of any of claims 1 to 5, wherein, The optical total track length of the optical lens, i.e., the center distance TTL from the center of the object side of the first lens of the optical lens to the center of the imaging surface of the optical lens, and a total focal length value F of the optical lens satisfy: 10.285≤TTL / F≤15.

14. The optical lens of any of claims 1 to 5, wherein, The focal length value F1 of the first lens and the total focal length value F of the optical lens satisfy: 2.119≤|F1 / F|≤4.

15. The optical lens of any of claims 1 to 5, wherein, The focal length value F4 of the fourth lens and the total focal length value F of the optical lens satisfy: 2.831≤|F4 / F|≤6.

16. The optical lens of any of claims 1 to 5, wherein, The focal length value F5 of the fifth lens and the total focal length value F of the optical lens satisfy: 3.383≤|F5 / F|≤6.

17. The optical lens of any of claims 1 to 5, wherein, The focal length value F6 of the sixth lens and the total focal length value F of the optical lens satisfy: 0≤F6 / F≤15.

18. The optical lens of any of claims 1 to 5, wherein, The focal length value F6 of the sixth lens and the focal length value F7 of the seventh lens satisfy: 0.534≤|F6 / F7|≤3.

19. The optical lens of any of claims 1 to 5, wherein, A center curvature radius R2 of an image side of the first lens of the optical lens and a center curvature radius R3 of an object side of the second lens of the optical lens satisfy: 0.011≤|(|R2|-|R3|) / (|R2|+|R3|)|≤0.

3.

20. The optical lens of any of claims 1 to 5, wherein, A maximum value dn of thicknesses in the first lens to the seventh lens and a minimum value dm of thicknesses in the first lens to the seventh lens satisfy: 2.917≤dn / dm≤4.

21. The optical lens of any of claims 1 to 5, wherein, An opening angle arctan(1 / K(R2)) under a maximum field of view angle of an image side of the first lens of the optical lens satisfies: 68.497≥arctan(1 / K(R2))≥45, where K is a lens edge slope under the maximum field of view angle of the image side of the first lens of the optical lens, and R2 is a center curvature radius of the image side of the first lens.

22. The optical lens of any of claims 1 to 5, wherein, The total focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: F / EPD≤1.

4.

23. The optical lens of any of claims 1 to 5, wherein, An optical total track length of the optical lens, i.e., a center distance TTL from a subject side center of the first lens of the optical lens to an imaging surface of the optical lens, and a maximum half diameter DMAX of the first lens to the seventh lens satisfy: 4.204≤TTL / DMAX≤7.

24. The optical lens of any of claims 1 to 5, wherein, A center curvature radius R3 of a subject side surface of the second lens of the optical lens and a center curvature radius R4 of an image side surface of the second lens of the optical lens satisfy: -25≤1 / (1 / R3-1 / R4)≤-10.

25. The optical lens of any of claims 1 to 5, wherein, A focal length value F2 of the second lens and a total focal length value F of the optical lens satisfy: 173.994≥F2 / F≥1.

26. The optical lens of any of claims 1 to 5, wherein, The center curvature radius R3 of the subject side surface of the second lens of the optical lens, the center curvature radius R4 of the image side surface of the second lens of the optical lens, a refractive index ND2 of the second lens, and a center thickness T2 of the second lens satisfy: 0.010≥(ND2-1)*(1 / R3-1 / R4)+(ND2-1)²*T2 / (ND1*R3*R4)≥0.

27. The optical lens of any of claims 1 to 5, wherein, An effective clear aperture DL7 of the image side surface of the seventh lens, an optical back focal length BFL of the optical lens, i.e., a center distance from an image side center of the last lens of the optical lens to the imaging surface, and an image height H corresponding to a maximum field angle of the optical lens satisfy: 4≤DL7*BFL / H≤15.

28. The optical lens of any of claims 1 to 5, wherein, The effective clear aperture DL7 of the image side surface of the seventh lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.5≤DL7 / H≤5.

29. The optical lens of any of claims 1 to 5, wherein, An aperture diameter DGL and the total focal length value F of the optical lens satisfy: 2≤DGL / F≤2.

849.

30. The optical lens of any of claims 1 to 5, wherein, The optical lens satisfies at least one of the following relational expressions: The focal length value F3 of the third lens and the total focal length value F of the optical lens satisfy: 4.270≤|F3 / F|≤5.069; The optical back focal length BFL of the optical lens, i.e., the center distance from the image side center of the last lens of the optical lens to the imaging surface, and the optical total track length TTL of the optical lens, i.e., the center distance TTL from the subject side center of the first lens of the optical lens to the imaging surface of the optical lens satisfy: 0.174≥BFL / TTL≥0.133; The focal length value F4 of the fourth lens and the focal length value F5 of the fifth lens satisfy: 0.712≤|F4 / F5|≤0.920; The center curvature radius R3 of the subject side surface of the second lens of the optical lens and the center curvature radius R4 of the image side surface of the second lens of the optical lens satisfy: 0.758≤|R3 / R4|≤0.778; A center distance T12 from the image side surface of the first lens to the subject side surface of the second lens of the optical lens and the optical total track length TTL of the optical lens, i.e., the center distance TTL from the subject side center of the first lens of the optical lens to the imaging surface of the optical lens satisfy: 0.187≥T12 / TTL≥0.170; A focal length value F5 of the fifth lens and an overall focal length value F of the optical lens satisfy: 3.383≤|F5 / F|≤3.992; A focal length value F6 of the sixth lens and the overall focal length value F of the optical lens satisfy: 6.821≤F6 / F≤10.124; A maximum value dn of thickness in the first lens to the seventh lens and a minimum value dm of thickness in the first lens to the seventh lens satisfy: 2.917≤dn / dm≤3.330; An included angle arctan(1 / K(R2)) of the first lens of the optical lens at a maximum field angle of the image side surface thereof satisfies: 68.497≥arctan(1 / K(R2))≥50.237, wherein K is a lens edge slope at the maximum field angle of the image side surface of the first lens of the optical lens, and R2 is a central curvature radius of the image side surface of the first lens; An overall focal length value F of the optical lens and an entrance pupil diameter EPD of the optical lens satisfy: 1.100≤F / EPD≤1.3; An optical total length of the optical lens, i.e., a distance TTL from a center on the object side of the first lens of the optical lens to a center of an imaging surface of the optical lens and a maximum half aperture DMAX in the first lens to the seventh lens satisfy: 4.204≤TTL / DMAX≤5.356; A central curvature radius R3 of the object side surface of the second lens of the optical lens and a central curvature radius R4 of the image side surface of the second lens of the optical lens satisfy: -21.064≤1 / (1 / R3-1 / R4)≤-17.292; A diaphragm aperture DGL and the overall focal length value F of the optical lens satisfy: 2.636≤DGL / F≤2.849; A focal length value F7 of the seventh lens and the overall focal length value F of the optical lens satisfy: 5.172≤F7 / F≤13.883; A focal length value F6 of the sixth lens and a focal length value F7 of the seventh lens satisfy: 0.534≤|F6 / F7|≤1.954; A central curvature radius R3 of the object side surface of the second lens of the optical lens, a central curvature radius R4 of the image side surface of the second lens of the optical lens, a refractive index ND2 of the second lens, and a central thickness T2 of the second lens satisfy: 0.003≤(ND2-1)*(1 / R3-1 / R4)+(ND2-1)²*T2 / (ND2*R3*R4)≤0.

010.

31. An electronic device, comprising: An optical lens according to any one of claims 1 to 30 and an imaging element for converting an optical image formed by the optical lens into an electric signal.

Images