Optical lens, camera module and terminal equipment

Abstract

The invention discloses an optical lens, a camera module and terminal equipment, and the optical lens comprises a first lens with negative refractive power, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface at a paraxial region; a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface in paraxial regions, respectively; a third lens element with negative refractive power having a convex object-side surface and a concave image-side surface in paraxial regions, respectively; the fourth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The fifth lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. A sixth lens element with negative refractive power, the object-side surface and the image-side surface thereof being concave in a paraxial region; the seventh lens element with positive refractive power has an object-side surface and an image-side surface being convex in a paraxial region. The optical lens satisfies the following relational expressions: FOV is more than or equal to 190 degrees and less than or equal to 210 degrees; 14 < = TTL / F < = 16. The optical lens provided by the invention meets the requirements of a large field of view and miniaturization.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and in particular to an optical lens, a camera module and a terminal device. Background Art

[0002] In recent years, with the rapid development of intelligent driving technology and the widespread application of artificial intelligence (AI) technology, the market demand for automotive optical lenses has grown significantly, and its application scenarios have expanded from traditional imaging to fields such as environmental recognition. In assisted driving systems, optical lenses are the core optical components of environmental recognition modules. Their imaging quality directly affects the vehicle's recognition accuracy of the surrounding environment, which in turn affects driving safety. In order to meet the demand for optical lenses to capture large-scale, high-resolution images, the number of pixels in the accompanying photosensitive chips continues to increase, and the size of the photosensitive chips is also getting larger and larger. However, the design of optical lenses and photosensitive chips face the compatibility issues of large field of view and large pixels, as well as the contradiction between large field of view and miniaturization. Therefore, there is an urgent need to develop an optical lens that takes into account both large field of view and miniaturization to adapt to photosensitive chips with higher pixels and larger size. Summary of the Invention

[0003] In view of the above, it is necessary to propose an optical lens, a camera module and a terminal device to meet the requirements of both a large field of view and miniaturization, so as to adapt to photosensitive chips with higher pixels and larger sizes.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, comprising a total of seven lenses with refractive power, which include, in order from the object side to the image side along the optical axis: a first lens having negative refractive power, wherein the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis; a second lens having negative refractive power, wherein the object side surface of the second lens is convex at the near optical axis, and the image side surface of the second lens is concave at the near optical axis; a third lens having negative refractive power, wherein the object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is concave at the near optical axis; a fourth lens having positive refractive power, wherein the object side surface of the fourth lens is convex at the near optical axis, and the image side surface of the fourth lens is convex at the near optical axis; a fifth lens having positive refractive power, wherein the object side surface of the fourth lens is convex at the near optical axis, and the image side surface of the fourth lens is convex at the near optical axis; The lens has positive refractive power, the object-side surface of the fifth lens is convex at the near optical axis, and the image-side surface of the fifth lens is convex at the near optical axis; the sixth lens has negative refractive power, the object-side surface of the sixth lens is concave at the near optical axis, and the image-side surface of the sixth lens is concave at the near optical axis; the seventh lens has positive refractive power, the object-side surface of the seventh lens is convex at the near optical axis, and the image-side surface of the seventh lens is convex at the near optical axis; the optical lens satisfies the following relationship: 190°≤FOV≤210°; 14≤TTL / F≤16; wherein FOV is the maximum field of view of the optical lens, TTL is the distance from the object-side surface of the first lens to the imaging plane of the optical lens on the optical axis, and F is the effective focal length of the optical lens.

[0005] In the optical lens provided by the present application, the first lens with negative refractive power, matched with the object side surface that is convex at the near optical axis and the image side surface that is concave at the near optical axis, is conducive to expanding the field angle of the optical lens, is conducive to coupling more light into the optical lens, and improves the relative illumination of the optical lens; the second lens with negative refractive power, matched with the object side surface that is convex at the near optical axis and the image side surface that is concave at the near optical axis, can better control the aperture of the optical lens in cooperation with the first lens, which is conducive to miniaturization of the optical lens and is conducive to further coupling the light passing through the first lens into the optical lens; the third lens with negative refractive power, matched with the object side surface that is convex at the near optical axis and the image side surface that is concave at the near optical axis, is conducive to slowing down the light entering the optical lens, making the light trend smoothly transition to the fourth lens, and is conducive to correcting the field curvature of the optical lens; the fourth lens with positive refractive power, matched with the object side surface that is convex at the near optical axis and the image side surface that is concave at the near optical axis The convex object side surface and the convex image side surface at the near optical axis are beneficial to suppressing the field curvature of the optical lens; the fifth lens with positive refractive power, matched with the convex object side surface at the near optical axis and the convex image side surface at the near optical axis, are beneficial to compensating for the temperature drift of the optical lens in a high temperature or low temperature environment, thereby ensuring the imaging quality of the optical lens in a high temperature or low temperature environment; the sixth lens with negative refractive power, matched with the concave object side surface at the near optical axis and the concave image side surface at the near optical axis, are beneficial to correcting the chromatic aberration of the optical lens and ensuring the imaging quality of the optical lens; the seventh lens with positive refractive power, matched with the convex object side surface at the near optical axis and the convex image side surface at the near optical axis, fully corrects various aberrations in the optical lens, corrects the field aberration of the optical lens, simplifies the correction of the field curvature of the optical lens, reduces the tolerance sensitivity of the optical lens, and improves the imaging quality of the optical lens.

[0006] When the optical lens satisfies 190°≤FOV≤210°, the optical lens has a large field of view, meeting the wide-angle requirement of the optical lens, thereby obtaining richer subject information, achieving good optical performance and high imaging optical quality; when the optical lens satisfies 14≤TTL / F≤16, the optical assembly and focal length of the optical lens can be reasonably controlled, which is conducive to miniaturizing the optical lens design and better converging light on the imaging surface of the optical lens, thereby improving the imaging quality of the optical lens. Therefore, the optical lens of the present application meets the requirements of both a large field of view and miniaturization, and can be adapted to photosensitive chips with higher pixels and larger sizes.

[0007] In a second aspect, the present application discloses a camera module comprising a photosensitive chip and the optical lens described in the first aspect, wherein the photosensitive chip is disposed on the image side of the optical lens. A camera module with the optical lens can meet the requirements of both a large field of view and miniaturization, and can be adapted to photosensitive chips with higher pixels and larger sizes.

[0008] In a third aspect, the present application discloses a terminal device comprising a housing and the camera module described in the second aspect, wherein the camera module is disposed within the housing. The terminal device having the camera module can meet the requirements of both a large field of view and miniaturization, and can accommodate photosensitive chips with higher pixels and larger size. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic structural diagram of the optical lens disclosed in the first embodiment of this application.

[0010] Figure 2 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the first embodiment of the present application.

[0011] Figure 3 It is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application.

[0012] Figure 4 This is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the second embodiment of the present application.

[0013] Figure 5 It is a schematic structural diagram of the optical lens disclosed in the third embodiment of this application.

[0014] Figure 6 3. This is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the third embodiment of the present application.

[0015] Figure 7 It is a schematic structural diagram of the optical lens disclosed in the fourth embodiment of the present application.

[0016] Figure 8 4. It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the fourth embodiment of the present application.

[0017] Figure 9 It is a schematic structural diagram of the optical lens disclosed in the fifth embodiment of the present application.

[0018] Figure 10 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the fifth embodiment of the present application.

[0019] Figure 11 It is a schematic structural diagram of the optical lens disclosed in the sixth embodiment of the present application.

[0020] Figure 12 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the sixth embodiment of the present application.

[0021] Figure 13 It is a schematic structural diagram of the optical lens disclosed in the seventh embodiment of the present application.

[0022] Figure 14 1 and 2. These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the seventh embodiment of the present application.

[0023] Figure 15 It is a schematic structural diagram of the optical lens disclosed in the eighth embodiment of the present application.

[0024] Figure 16 This is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in the eighth embodiment of the present application.

[0025] Figure 17 It is a schematic structural diagram of the optical lens disclosed in the ninth embodiment of the present application.

[0026] Figure 18 These are the longitudinal spherical aberration curve, astigmatism curve, and distortion curve of the optical lens disclosed in the ninth embodiment of the present application.

[0027] Figure 19 It is a structural schematic diagram of the camera module disclosed in this application.

[0028] Figure 20 It is a structural diagram of the terminal device disclosed in this application. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1 The present embodiment discloses an optical lens 100 having a total of seven lenses with refractive power. Along the optical axis O, from the object side to the image side, they are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side of the first lens L1, and are ultimately imaged on the imaging surface IMG of the optical lens 100.

[0031] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0032] Furthermore, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens L2 is concave at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is concave at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, The image-side surface S8 of the fourth lens element L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens element L5 is convex at the near optical axis O, and the image-side surface S10 of the fifth lens element L5 is convex at the near optical axis O; the object-side surface S11 of the sixth lens element L6 is concave at the near optical axis O, and the image-side surface S12 of the sixth lens element L6 is concave at the near optical axis O; the object-side surface S13 of the seventh lens element L7 is convex at the near optical axis O, and the image-side surface S14 of the seventh lens element L7 is convex at the near optical axis O.

[0033] In the optical lens 100 provided in the present application, the first lens L1 having a negative refractive power, in combination with the object-side surface S1 having a convex surface at the near optical axis O and the image-side surface S2 having a concave surface at the near optical axis O, is conducive to expanding the field of view of the optical lens 100, is conducive to coupling more light into the optical lens 100, and improves the relative illumination of the optical lens 100; the second lens L2 having a negative refractive power, in combination with the object-side surface S3 having a convex surface at the near optical axis O and the image-side surface S4 having a concave surface at the near optical axis O, can better control the optical field of view of the optical lens 100 in cooperation with the first lens L1. The diameter of the lens 100 is conducive to miniaturization of the optical lens 100, and is conducive to further coupling the light passing through the first lens L1 into the optical lens 100; the third lens L3 with negative refractive power, matched with the object side S5 with a convex surface at the near optical axis O and the image side S6 with a concave surface at the near optical axis O, is conducive to slowing down the light entering the optical lens 100, so that the light trend transitions smoothly to the fourth lens L4, which is conducive to correcting the field curvature of the optical lens 100; the fourth lens L4 with positive refractive power, matched with the convex surface at the near optical axis O, is conducive to correcting the field curvature of the optical lens 100. The object-side surface S7 and the image-side surface S8 which is convex at the near optical axis O are beneficial to suppressing the field curvature of the optical lens 100; the fifth lens L5 with positive refractive power, matched with the object-side surface S9 which is convex at the near optical axis O and the image-side surface S10 which is convex at the near optical axis O, are beneficial to compensating for the temperature drift of the optical lens 100 in a high temperature or low temperature environment, thereby ensuring the imaging quality of the optical lens 100 in a high temperature or low temperature environment; the sixth lens L6 with negative refractive power, matched with the object-side surface S11 which is concave at the near optical axis O and the image-side surface S10 which is convex at the near optical axis O, are beneficial to suppressing the field curvature of the optical lens 100; the fifth lens L5 with positive refractive power, matched with the object-side surface S9 which is convex at the near optical axis O and the image-side surface S10 which is convex at the near optical axis O, are beneficial to compensating for the temperature drift of the optical lens 100 in a high temperature or low temperature environment The image-side surface S12, which is concave at the optical axis O, is conducive to correcting the chromatic aberration of the optical lens 100 and ensuring the imaging quality of the optical lens 100. The seventh lens L7 with positive refractive power, in combination with the object-side surface S13, which is convex at the near optical axis O, and the image-side surface S14, which is convex at the near optical axis O, fully correct various aberrations in the optical lens 100, correct the field aberration of the optical lens 100, simplify the correction of the field curvature difference of the optical lens 100, reduce the tolerance sensitivity of the optical lens 100, and improve the imaging quality of the optical lens 100.

[0034] In some embodiments, when the optical lens 100 is used in a terminal device such as an in-vehicle device or a dashcam, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 may all be made of glass. This allows the optical lens 100 to achieve excellent optical performance while also reducing the effects of temperature on these lenses. Of course, some of the multiple lenses in the optical lens 100 may be made of glass, while others may be made of plastic. This not only reduces the effects of temperature on the lenses, thereby achieving better imaging results, but also reduces the manufacturing cost and weight of the lenses, thereby reducing the manufacturing cost and overall weight of the optical lens 100. Furthermore, it is understood that when the optical lens 100 is used in a terminal device such as a smartphone or smart tablet, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 may be made of plastic to reduce the overall weight of the optical lens 100.

[0035] In some embodiments, considering the simple manufacturing process and low production cost of spherical lenses, as well as the flexibility in designing the lens surface shape, the imaging resolution capability of the optical lens 100 is enhanced. Aspherical lenses allow for more flexible design of the object-side or image-side surfaces of the lens, effectively resolving undesirable issues such as unclear imaging, distorted visual field, or narrow field of view while maintaining a smaller and thinner lens. Furthermore, the optical lens 100 can achieve good imaging quality without requiring an excessive number of lenses, thereby shortening the length of the optical lens 100. Based on this, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be spherical lenses, and the seventh lens L7 can be an aspherical lens. This combination of spherical and aspherical surfaces not only improves the machinability of each lens, facilitating surface design, but also allows for more flexible design of the object-side and image-side surfaces of the lenses. This allows each lens to effectively address issues such as blurred imaging, distorted visual field, or a narrow field of view while maintaining a relatively small and thin size. Furthermore, the optical lens 100 can achieve good imaging quality and high resolution without requiring an excessive number of lenses, and this also facilitates shortening the length of the optical lens 100. It will be appreciated that in other embodiments, the surfaces of each lens in the optical lens 100 can be all spherical, all aspherical, or any combination of spherical and aspherical surfaces. The specific selection can be based on actual needs and is not specifically limited in this embodiment.

[0036] In some embodiments, the optical lens 100 further includes an aperture STO, which is disposed between the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5. The aperture STO may be an aperture stop and / or a field stop. For example, the aperture STO may be an aperture stop, or the aperture STO may be a field stop, or the aperture STO may be both an aperture stop and a field stop. Placing the aperture STO between the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5 facilitates effective convergence of light entering the optical lens 100, thereby reducing the overall optical length of the optical lens 100 and the front port diameter of the optical lens 100. It is understood that in other embodiments, the aperture STO may also be disposed between other lenses, and the specific configuration may be adjusted based on actual conditions, and this embodiment does not specifically limit this.

[0037] In some embodiments, the optical lens 100 further includes a filter IR, which is disposed between the image-side surface S14 of the seventh lens L7 and the imaging surface IMG of the optical lens 100. Optionally, the filter IR may be an infrared cutoff filter to filter out infrared light and pass visible light, so that the imaging is more consistent with the visual experience of the human eye, thereby improving the imaging quality. In other embodiments, the filter IR may be an infrared bandpass filter to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 100, so that the optical lens 100 can image in a dark environment or special application scenarios and obtain better imaging quality. It is understandable that the filter IR may be made of plastic, or may be made of optical glass coating, or an infrared filter of other materials, and may be selected according to actual needs and is not specifically limited in this embodiment.

[0038] In some embodiments, the optical lens 100 further includes a protective glass CG, which is disposed between the filter IR and the imaging surface IMG of the optical lens 100, thereby protecting the photosensitive chip and preventing dust. The protective glass CG can be made of plastic, optical glass coating, or other materials. The selection can be based on actual needs and is not specifically limited in this embodiment. It is understood that the protective glass CG can be part of the optical lens 100 or can be removed from the optical lens 100. However, after the protective glass CG is removed, the overall optical length of the optical lens 100 remains unchanged.

[0039] In some embodiments, the optical lens 100 satisfies the relationship: 190°≤FOV≤210°. Here, FOV is the maximum field of view of the optical lens 100. Specifically, the FOV can be 190°, 191°, 192°, 193°, 194°, 195°, 196°, 197°, 198°, 199°, 200°, 201°, 202°, 203°, 204°, 205°, 206°, 207°, 208°, 209°, 210°, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of FOV, the optical lens 100 has a large field of view, meeting the wide-angle requirement of the optical lens 100, thereby obtaining richer subject information, achieving good optical performance and high imaging optical quality.

[0040] In some embodiments, the optical lens 100 satisfies the relationship: 14 ≤ TTL / F ≤ 16. Here, TTL is the distance from the object-side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and F is the effective focal length of the optical lens 100. Furthermore, 14.1 ≤ TTL / F ≤ 15.9. Specifically, TTL / F can be 14, 14.1, 14.15, 14.154, 14.2, 14.3, 14.4, 14.5, 14.6, 14.7, 14.8, 14.9, 15, 15.1, 15.2, 15.3, 15.4, 15.5, 15.6, 15.7, 15.8, 15.89, 15.898, 15.9, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of TTL / F, the optical assembly and focal length of the optical lens 100 can be reasonably controlled, which is conducive to achieving a miniaturized design of the optical lens 100, and at the same time is conducive to better converging light on the imaging surface IMG of the optical lens 100, thereby helping to improve the imaging quality of the optical lens 100.

[0041] In some embodiments, the optical lens 100 satisfies the relationship: 7.5≤TTL / IMGH≤8. IMGH is half the image height corresponding to the maximum field of view of the optical lens 100. Furthermore, 7.6≤TTL / IMGH≤7.8. Specifically, TTL / IMGH can be 7.5, 7.51, 7.53, 7.55, 7.58, 7.59, 7.6, 7.62, 7.64, 7.68, 7.69, 7.7, 7.74, 7.78, 7.787, 7.79, 7.8, 7.81, 7.83, 7.85, 7.87, 7.89, 7.9, 7.91, 7.93, 7.95, 7.97, 7.98, 7.99, 8, etc. When the optical lens 100 satisfies the above relationship, by properly configuring the TTL / IMGH range, the optical lens 100 can be adapted to high-pixel photosensitive elements, which is beneficial for improving the resolution of the optical lens 100. At the same time, by controlling the ratio of the image height to the total optical length of the optical lens 100 at a certain image height, the total optical length of the optical lens 100 can be limited to a small value, which is beneficial for achieving miniaturization. However, when the TTL / IMGH range exceeds the upper limit of 8, the total optical length of the optical lens 100 increases, resulting in an increase in the size of the front lens element of the optical lens 100, which is not conducive to miniaturization. When the TTL / IMGH range exceeds the lower limit of 7.5, while miniaturization can be achieved, it is difficult to correct the aberration of the optical lens 100.

[0042] In some embodiments, the optical lens 100 satisfies the relationship: 1.8 ≤ IMGH / F ≤ 2.1. Furthermore, 1.83 ≤ IMGH / F ≤ 2.09. Specifically, IMGH / F can be 1.8, 1.81, 1.83, 1.832, 1.85, 1.87, 1.89, 1.9, 1.91, 1.93, 1.95, 1.97, 1.99, 2, 2.01, 2.03, 2.05, 2.07, 2.08, 2.086, 2.09, 2.1, etc. When the optical lens 100 satisfies the above relationship, by properly configuring the range of IMGH / F, the optical lens 100 can achieve high pixel requirements, thereby improving the imaging quality of the optical lens 100. However, when IMGH / F exceeds the upper limit of 2.1, the effective focal length of the optical lens 100 becomes smaller and the picture angle becomes larger, making it difficult to correct the aberration; when IMGH / F exceeds the lower limit of 1.8, the effective focal length of the optical lens 100 becomes larger and it is difficult to maintain the picture angle. If the picture angle is maintained first, the field curvature aberration will become larger, and then the peripheral resolution ability will deteriorate, making it difficult to guarantee pixels.

[0043] In some embodiments, the optical lens 100 satisfies the relationship: 95°≤FOV / FNO≤105°. Wherein, FNO is the aperture number of the optical lens 100. Specifically, FOV / FNO can be 95°, 95.5°, 96°, 96.5°, 97°, 97.5°, 98°, 98.5°, 99°, 99.5°, 100°, 100.5°, 101°, 101.5°, 102°, 102.5°, 103°, 103.5°, 104°, 104.5°, 105°, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of FOV / FNO, the aperture number of the optical lens 100 can be reduced while taking into account a large field of view, which is conducive to achieving a miniaturized design of the optical lens 100 and reducing costs.

[0044] In some embodiments, the optical lens 100 satisfies the relationship: 1.7≤CT12 / CT1≤2.7. Here, CT12 is the distance between the image-side surface S2 of the first lens element L1 and the object-side surface S3 of the second lens element L2 on the optical axis O, and CT1 is the thickness of the first lens element L1 on the optical axis O. Furthermore, 1.73≤CT12 / CT1≤2.68. Specifically, CT12 / CT1 can be 1.7, 1.71, 1.73, 1.75, 1.77, 1.79, 1.8, 1.82, 1.85, 1.89, 1.9, 1.95, 2, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.68, 2.69, 2.7, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of CT12 / CT1, it is beneficial to reduce the deformation generated during the lens assembly process and reduce the difficulty of assembly. At the same time, it is beneficial to reduce the size of the optical lens 100, achieve miniaturization, and improve the field curvature aberration of the off-axis field of view.

[0045] In some embodiments, the optical lens 100 satisfies the relationship: 3.7≤R3 / R4≤35. Wherein, R3 is the radius of curvature of the object side surface S3 of the second lens L2 at the optical axis O, and R4 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis O. Furthermore, 3.9≤R3 / R4≤30.3. Specifically, R3 / R4 can be 3.7, 3.8, 3.9, 4, 6, 8, 10, 15, 18, 20, 23, 25, 28, 29, 30, 30.3, 31, 35, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R3 / R4, the surface shape of the second lens L2 can be reasonably configured to reduce the tolerance sensitivity of the second lens L2 and improve the molding yield of the second lens L2. However, when the range of R3 / R4 exceeds the upper limit of 50, the refractive power of the second lens L2 is insufficient, the back focus is reduced, and the processability of the second lens L2 is deteriorated; when the range of R3 / R4 exceeds the lower limit of 3.7, the refractive power of the second lens L2 increases, resulting in a larger field curvature difference and an increase in the total optical length, which is not conducive to miniaturization of the optical lens 100.

[0046] In some embodiments, the optical lens 100 satisfies the relationship: -5 ≤ F2 / F ≤ -2.6. F2 is the effective focal length of the second lens L2. Furthermore, -4.92 ≤ F2 / F ≤ -2.7. Specifically, F2 / F can be -5, -4.95, -4.92, -4.9, -4.8, -4.7, -4.6, -4.4, -4.2, -4, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, -3.1, -3, -2.9, -2.8, -2.786, -2.7, -2.6, etc. When the optical lens 100 satisfies the above relationship, rationally configuring the range of F2 / F can help control the light passing through the first lens L1 to reasonably enter the third lens L3, help correct the aberrations generated by the first lens L1, and reduce tolerance sensitivity. However, when the F2 / F range exceeds the upper limit of -2.6, the refractive power of the second lens L2 is insufficient, which increases the total optical length; when the F2 / F range exceeds the lower limit of -5, the refractive power of the second lens L2 increases, resulting in a reduction in the back foot, which is not conducive to matching the optical lens 100 with the photosensitive chip.

[0047] In some embodiments, the optical lens 100 satisfies the relationship: 0.4 ≤ CT3 / CT23 ≤ 1.1. Here, CT3 is the thickness of the third lens element L3 on the optical axis O, and CT23 is the distance between the image-side surface S4 of the second lens element L2 and the object-side surface S5 of the third lens element L3 on the optical axis O. Furthermore, 0.47 ≤ CT3 / CT23 ≤ 1.09. Specifically, CT3 / CT23 can be 0.4, 0.41, 0.43, 0.45, 0.47, 0.49, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.01, 1.03, 1.05, 1.07, 1.09, 1.1, etc. When the optical lens 100 satisfies the above relationship, by properly configuring the range of CT3 / CT23, the thickness of the third lens L3 on the optical axis O is appropriately set, which helps to simplify the surface configuration of the second lens L2 and the third lens L3, allowing the second lens L2 and the third lens L3 to adjust to each other and reduce aberrations. At the same time, the spacing between the second lens L2 and the third lens L3 on the optical axis O is also appropriately set, which helps to control the incident angle of light and maintain the miniaturization feature of the optical lens 100.

[0048] In some embodiments, the optical lens 100 satisfies the relationship: 1.5 ≤ R5 / R6 ≤ 4.8. Here, R5 is the radius of curvature of the object-side surface S5 of the third lens element L3 at the optical axis O, and R6 is the radius of curvature of the image-side surface S6 of the third lens element L3 at the optical axis O. Furthermore, 1.7 ≤ R5 / R6 ≤ 4.6. Specifically, R5 / R6 can be 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, etc. When the optical lens 100 satisfies the above relationship, by rationally configuring the range of R5 / R6 and controlling the ratio of the curvature radii of the object-side surface S5 and the image-side surface S6 of the third lens element L3 within a certain range, light rays are smoothly transferred to the rear, aberrations of the optical lens element 100 are reduced, and the resolution of the optical lens element 100 is improved. However, when the range of R5 / R6 exceeds the upper limit of 4.8, the refractive power of the third lens element L3 is insufficient, the back focus is reduced, and the processability of the third lens element L3 is degraded. When the range of R5 / R6 exceeds the lower limit of 1.5, the refractive power of the third lens element L3 increases, resulting in an increase in field curvature aberration and an increase in the optical assembly.

[0049] In some embodiments, the optical lens 100 satisfies the relationship: -10≤F3 / F≤-3. Wherein, F3 is the effective focal length of the third lens L3. Furthermore, -9.3≤F3 / F≤-3.2. Specifically, F3 / F can be -10, -9.9, -9.7, -9.5, -9.3, -9.1, -9, -8.5, -8, -7.5, -7, -6.5, -6, -5.5, -5, -4.5, -4, -3.7, -3.5, -3.3, -3.2, -3.1, -3, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of F3 / F, the incident light from the front can be effectively collected and compressed, so that the light can be smoothly transferred to the rear optical lens 100, reducing the generation of aberrations, thereby improving the imaging quality of the optical lens 100. However, when the range of F3 / F exceeds the upper limit of -3, the refractive power of the third lens L3 is insufficient, and the total optical length increases; when the range of F3 / F exceeds the lower limit of -10, the refractive power of the third lens L3 increases, resulting in a decrease in back focus, which is not conducive to matching the optical lens 100 with the photosensitive chip.

[0050] In some embodiments, the optical lens 100 satisfies the relationship: 3≤TTL / CT4≤4.2. Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis O. Furthermore, 3.1≤TTL / CT4≤4.11. Specifically, TTL / CT4 can be 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.11, 4.15, 4.19, 4.2, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of TTL / CT4, the ratio of the total optical length of the optical lens 100 to the center thickness of the fourth lens L4 can be controlled, which is beneficial to the reasonable allocation of the entire space of the optical lens 100, thereby making the structure more compact and facilitating the miniaturization design of the optical lens 100. However, when the range of TTL / CT4 exceeds the upper limit of 4.2, the chromatic aberration correction of the fourth lens L4 is insufficient, which is not conducive to the optical lens 100 achieving high pixels; when the range of TTL / CT4 exceeds the lower limit of 3, the chromatic aberration correction of the fourth lens L4 is excessive, which is not conducive to the miniaturization of the optical lens 100.

[0051] In some embodiments, the optical lens 100 satisfies the relationship: 3≤CT4 / F≤5. Furthermore, 3.4≤CT4 / F≤4.7. Specifically, CT4 / F can be 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of CT4 / F, the field curvature and astigmatism of the optical lens 100 can be corrected while ensuring the reasonable structure of the fourth lens L4. However, when the range of CT4 / F exceeds the upper limit of 5, the chromatic aberration correction of the fourth lens L4 is excessive, which is not conducive to miniaturization of the optical lens 100; when the range of CT4 / F exceeds the lower limit of 3, the chromatic aberration correction of the fourth lens L4 is excessive, which is not conducive to achieving high pixels of the optical lens 100.

[0052] In some embodiments, the optical lens 100 satisfies the relationship: 2.4 ≤ F4 / F ≤ 3.1. Here, F4 is the effective focal length of the fourth lens element L4. Furthermore, 2.48 ≤ F4 / F ≤ 2.98. Specifically, F4 / F can be 2.4, 2.42, 2.44, 2.46, 2.48, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.85, 2.9, 2.95, 2.98, 3, 3.01, 3.03, 3.05, 3.07, 3.09, 3.1, etc. When the optical lens 100 satisfies the above relationship, rationally configuring the range of F4 / F facilitates rationally configuring the focal length of the fourth lens element L4, effectively correcting the aberrations of the optical lens 100, and improving the imaging quality of the optical lens 100. However, when the F4 / F range exceeds the upper limit of 3.1, the refractive power of the fourth lens L4 is insufficient; when the F4 / F range exceeds the lower limit of 2.4, the chromatic aberration correction of the fourth lens L4 is excessive, which is not conducive to achieving high pixels of the optical lens 100.

[0053] In some embodiments, the optical lens 100 satisfies the relationship: -2 ≤ F5 / F6 ≤ -1.3. Here, F5 is the effective focal length of the fifth lens L5, and F6 is the effective focal length of the sixth lens L6. Furthermore, -1.9 ≤ F5 / F6 ≤ -1.4. Specifically, F5 / F6 can be -2, -1.95, -1.9, -1.85, -1.8, -1.75, -1.7, -1.65, -1.6, -1.55, -1.5, -1.45, -1.4, -1.35, -1.3, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of F5 / F6, the spherical aberration contribution of the fifth lens L5 and the sixth lens L6 can be kept within a reasonable range, which is also beneficial for improving the imaging quality of the optical lens 100 in the field of view area on the optical axis O. However, when the range of F5 / F6 exceeds the upper limit of -1.3, the refractive power of the fifth lens L5 is insufficient, resulting in excessive chromatic aberration correction of the optical lens 100 and an increase in the total optical length; when the range of F5 / F6 exceeds the lower limit of -2, the refractive power of the fifth lens L5 increases, resulting in insufficient chromatic aberration correction of the optical lens and a reduced back focus, which is not conducive to matching the optical lens 100 with the photosensitive chip.

[0054] In some embodiments, the optical lens 100 satisfies the relationship: 2≤F5 / F≤2.9. Furthermore, 2.2≤F5 / F≤2.8. Specifically, F5 / F can be 2, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.85, 2.9, etc. When the optical lens 100 satisfies the above relationship, by rationally configuring the range of F5 / F, the fifth lens L5 can be prevented from introducing excessive spherical aberration, effectively correcting aberrations, reducing tolerance sensitivity, and facilitating improved resolution of the optical lens 100. At the same time, the total optical length of the optical lens 100 can be controlled, facilitating miniaturization of the optical lens 100. However, when the range of F5 / F exceeds the upper limit of 2.9, the refractive power of the fifth lens L5 is insufficient, resulting in an increase in the total optical length; when the range of F5 / F exceeds the lower limit of 2, the refractive power of the fifth lens L5 increases, resulting in insufficient correction of chromatic aberration of the optical axis and reduced back focus, which is not conducive to matching the optical lens 100 with the photosensitive chip.

[0055] In some embodiments, the optical lens 100 satisfies the relationship: 2.1 ≤ CT5 / CT6 ≤ 2.82. Here, CT5 is the thickness of the fifth lens element L5 along the optical axis O, and CT6 is the thickness of the sixth lens element L6 along the optical axis O. Furthermore, 2.109 ≤ CT5 / CT6 ≤ 2.811. Specifically, CT5 / CT6 can be 2.1, 2.109, 2.11, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.81, 2.811, 2.815, 2.819, 2.82, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of CT5 / CT6, it is beneficial to shorten the arrangement space of the fifth lens L5 and the sixth lens L6 in the optical lens 100, thereby maintaining the miniaturization of the optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies the relationship: -4 ≤ R13 / R14 ≤ -1, where R13 is the radius of curvature of the object-side surface S13 of the seventh lens element L7 at the optical axis O, and R14 is the radius of curvature of the image-side surface S14 of the seventh lens element L7 at the optical axis O. Furthermore, -3.7 ≤ R13 / R14 ≤ -1.1. Specifically, R13 / R14 can be -4, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, -3.1, -3, -2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R13 / R14, the ratio of the curvature radius of the object side surface S13 and the image side surface S14 of the last lens is controlled within a certain range, thereby ensuring miniaturization while reducing ghosting at the last lens.

[0057] In some embodiments, the optical lens 100 satisfies the relationship: 1.55 ≤ SD14 / IMGH ≤ 1.85. Here, SD14 is half the maximum effective aperture of the image-side surface S14 of the seventh lens element L7. Furthermore, 1.56 ≤ SD14 / IMGH ≤ 1.84. Specifically, SD14 / IMGH can be 1.55, 1.56, 1.57, 1.58, 1.59, 1.6, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68, 1.69, 1.7, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.8, 1.81, 1.82, 1.83, 1.84, 1.85, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of SD14 / IMGH, half of the maximum effective aperture of the image-side surface S14 of the seventh lens element L7 can be adapted to the imaging surface IMG of the optical lens 100, thereby enabling more light to enter the imaging surface IMG of the optical lens 100 through the seventh lens element L7, which is beneficial to improving the imaging quality of the optical lens 100.

[0058] In some embodiments, the optical lens 100 satisfies the relationship: 4.9 ≤ SD1 / IMGH ≤ 5.21. Here, SD1 is half of the maximum effective aperture of the object-side surface 1S of the first lens element L1. Furthermore, 4.95 ≤ SD1 / IMGH ≤ 5.208. Specifically, SD1 / IMGH can be 4.9, 4.91, 4.92, 4.93, 4.94, 4.95, 4.96, 4.97, 4.98, 4.99, 5, 5.01, 5.02, 5.03, 5.04, 5.05, 5.06, 5.07, 5.08, 5.09, 5.1, 5.11, 5.12, 5.13, 5.14, 5.15, 5.16, 5.17, 5.18, 5.19, 5.2, 5.208, 5.21, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of SD1 / IMGH, the optical lens 100 can be adapted to a larger photosensitive chip within a smaller space constraint, thereby improving the imaging quality of the optical lens 100; at the same time, the limitation of the above relationship can make full use of the internal space of the first lens L1, thereby improving the compactness of the optical lens 100, thereby realizing a miniaturized design of the optical lens 100.

[0059] In some embodiments, the optical lens 100 satisfies the relationship: 100° ≤ FOV*F / IMGH ≤ 110°. Further, 100.6° ≤ FOV*F / IMGH ≤ 107°. Specifically, FOV*F / IMGH can be 100°, 100.1°, 100.3°, 100.5°, 100.6°, 100.8°, 101°, 101.5°, 102°, 102.5°, 103°, 103.5°, 104°, 104.5°, 105°, 105.5°, 106°, 106.5°, 107°, 107.5°, 108°, 108.5°, 109°, 109.5°, 110°, etc. When the optical lens 100 satisfies the above relationship, by properly configuring the range of FOV*F / IMGH, the optical lens 100 can maintain good optical performance, achieving the characteristics of a wide viewing angle, a large image plane, and a high pixel count of the optical lens 100, thereby being able to well capture the details of the subject. Furthermore, the optical lens 100 can also effectively suppress distortion, allowing the optical lens 100 to have a wide viewing angle while also having a low distortion risk. However, when the range of FOV*F / IMGH exceeds the upper limit of 110°, the picture angle of the optical lens 100 increases, making it difficult to ensure the optical performance of the optical lens 100 and resulting in an increase in the front lens element of the optical lens 100. When the range of FOV*F / IMGH exceeds the lower limit of 100°, it is also difficult to ensure the picture angle of the optical lens 100.

[0060] In some embodiments, the optical lens 100 satisfies the relationship: 2≤∑CT / ∑AT≤3.4. Here, ∑CT is the sum of the thicknesses of each lens from the first lens L1 to the seventh lens L7 along the optical axis O, and ∑AT is the sum of the air spaces between adjacent lenses from the first lens L1 to the seventh lens L7 along the optical axis O. Furthermore, 2.04≤∑CT / ∑AT≤3.37. Specifically, ∑CT / ∑AT can be 2, 2.02, 2.04, 2.08, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.05, 3.1, 3.15, 3.2, 3.25, 3.3, 3.35, 3.37, 3.39, 3.4, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of ΣCT / ΣAT, it is beneficial to reasonably control the distance between each lens, making the structure of the optical lens 100 compact and facilitating miniaturization.

[0061] In some embodiments, the optical lens 100 satisfies the relationship: 1.6 ≤ BFL / F ≤ 2.2. Here, BFL is the minimum distance between the image-side surface S14 of the seventh lens element L7 and the imaging surface IMG of the optical lens 100 in a direction parallel to the optical axis O. Furthermore, 1.604 ≤ BFL / F ≤ 2.14. Specifically, BFL / F can be 1.6, 1.602, 1.604, 1.608, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.68, 1.69, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2, 2.05, 2.1, 2.14, 2.15, 2.18, 2.19, 2.2, etc. When the optical lens 100 satisfies the above relationship, the ratio of the back focal length of the optical lens 100 to the effective focal length of the optical lens 100 can be controlled by reasonably configuring the range of BFL / F, which is conducive to reasonably controlling the back focal length and ensuring the matching performance of the optical lens 100 and the photosensitive chip.

[0062] In some embodiments, the optical lens 100 satisfies the relationship: -6.7 ≤ F1 / F ≤ -4.5. Wherein, F1 is the effective focal length of the first lens L1. Furthermore, -6.63 ≤ F1 / F ≤ -4.7. Specifically, F1 / F can be -6.7, -6.65, -6.63, -6.6, -6.55, -6.5, -6.4, -6.3, -6.2, -6.1, -6, -5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.3, -5.2, -5.1, -5, -4.9, -4.8, -4.7, -4.6, -4.5, etc. When the optical lens 100 satisfies the above relationship, by rationally configuring the range of F1 / F, it is possible to effectively control light segregation, reduce tolerance sensitivity, and thus effectively improve the imaging quality of the optical lens 100. At the same time, the total optical length of the optical lens 100 can be controlled, which is conducive to miniaturization of the optical lens 100.

[0063] In some embodiments, the optical lens 100 satisfies the relationship: -1.8 ≤ F6 / F ≤ -1.3. Furthermore, -1.795 ≤ F6 / F ≤ -1.38. Specifically, F6 / F can be -1.8, -1.795, -1.79, -1.78, -1.77, -1.75, -1.73, -1.71, -1.7, -1.65, -1.6, -1.55, -1.5, -1.45, -1.4, -1.39, -1.38, -1.37, -1.36, -1.35, -1.34, -1.33, -1.32, -1.31, -1.3, etc. When the optical lens 100 satisfies the above relationship, by rationally configuring the range of F6 / F, it is beneficial to improve the resolution of the optical lens 100 and achieve high-pixel imaging of the optical lens 100.

[0064] In some embodiments, the optical lens 100 satisfies the relationship: 2.4 ≤ F7 / F ≤ 3.3. F7 is the effective focal length of the seventh lens element L7. Furthermore, 2.44 ≤ F7 / F ≤ 3.28. Specifically, F7 / F can be 2.4, 2.42, 2.44, 2.46, 2.48, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.15, 3.2, 3.25, 3.28, 3.3, etc. When the optical lens 100 satisfies the above relationship, rationally configuring the range of F7 / F facilitates the rational distribution of the overall refractive power of the optical lens 100, improves the resolution of the optical lens 100, and achieves high-pixel imaging of the optical lens 100.

[0065] In some embodiments, the optical lens 100 satisfies the relationship: 2.3 ≤ R1 / R2 ≤ 2.85. Here, R1 is the radius of curvature of the object-side surface S1 of the first lens element L1 at the optical axis O, and R2 is the radius of curvature of the image-side surface S2 of the first lens element L1 at the optical axis O. Furthermore, 2.32 ≤ R1 / R2 ≤ 2.83. Specifically, R1 / R2 can be 2.3, 2.31, 2.32, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.81, 2.82, 2.83, 2.84, 2.85, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R1 / R2, the effective aperture of the first lens L1 of the optical lens 100 is effectively controlled, which is beneficial to expanding the light collection range of the optical lens 100, increasing the amount of light passing, and making the light transition smooth.

[0066] In some embodiments, the optical lens 100 satisfies the relationship: -1.7 ≤ R7 / R8 ≤ -1. Here, R7 is the radius of curvature of the object-side surface S7 of the fourth lens element L4 at the optical axis O, and R8 is the radius of curvature of the image-side surface S8 of the fourth lens element L4 at the optical axis O. Furthermore, -1.64 ≤ R7 / R8 ≤ -1. Specifically, R7 / R8 can be -1.7, -1.65, -1.64, -1.6, -1.55, -1.5, -1.45, -1.4, -1.35, -1.3, -1.25, -1.2, -1.15, -1.1, -1.05, -1, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R7 / R8 and controlling the ratio of the curvature radius of the object-side surface S7 and the image-side surface S8 of the fourth lens L4 within a certain range, the aberration of the optical lens 100 can be corrected and the light passing through the third lens L3 can be ensured to be smooth, thereby reducing the tolerance sensitivity of the optical lens 100.

[0067] In some embodiments, the optical lens 100 satisfies the relationship: -1.7 ≤ R9 / R10 ≤ -0.7. Here, R9 is the radius of curvature of the object-side surface S9 of the fifth lens element L5 at the optical axis O, and R10 is the radius of curvature of the image-side surface S10 of the fifth lens element L5 at the optical axis O. Furthermore, -1.62 ≤ R9 / R10 ≤ -0.71. Specifically, R9 / R10 can be -1.7, -1.65, -1.62, -1.6, -1.55, -1.5, -1.45, -1.4, -1.35, -1.3, -1.25, -1.2, -1.15, -1.1, -1.05, -1, -0.95, -0.9, -0.85, -0.8, -0.75, -0.71, -0.7, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R9 / R10 and controlling the ratio of the curvature radii of the object-side surface S9 and the image-side surface S10 of the fifth lens L5 within a certain range, it is beneficial to correct the aberration of the optical lens 100 and improve the resolution; at the same time, it is beneficial to shorten the total optical length of the optical lens 100 and facilitate miniaturization.

[0068] In some embodiments, the optical lens 100 satisfies the relationship: -1.3 ≤ R11 / R12 ≤ -0.3, where R11 is the radius of curvature of the object-side surface S11 of the sixth lens element L6 at the optical axis O, and R12 is the radius of curvature of the image-side surface S12 of the sixth lens element L6 at the optical axis O. Furthermore, -1.28 ≤ R11 / R12 ≤ -0.303. Specifically, R11 / R12 can be -1.3, -1.29, -1.28, -1.26, -1.24, -1.22, -1.2, -1.15, -1.1, -1.05, -1, -0.95, -0.9, -0.85, -0.8, -0.75, -0.7, -0.65, -0.6, -0.55, -0.5, -0.45, -0.4, -0.35, -0.31, -0.303, -0.3, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the range of R11 / R12, the ratio of the curvature radii of the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 can be controlled within a certain range, which is conducive to achieving a miniaturized design.

[0069] In some embodiments, the fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens, which is beneficial for correcting chromatic aberration and balancing various aberrations, improving the resolving power of the optical lens 100, and can effectively reduce tolerance sensitivity, thereby improving the imaging quality of the optical lens 100; at the same time, it is beneficial for shortening the overall optical length of the optical lens 100, thereby facilitating a miniaturized design.

[0070] The surface shape of each aspheric lens can be defined using, but not limited to, the following aspheric formula:

[0071]

[0072] Where Z is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, c is the curvature of the aspheric vertex, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1), r is the distance from any point on the aspheric surface to the optical axis O, k is the cone constant, and Ai is the coefficient corresponding to the i-th higher-order term in the aspheric surface shape formula.

[0073] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0074] First embodiment

[0075] The structural diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows: Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, an aperture STO, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0076] Furthermore, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0077] Furthermore, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is convex at the near optical axis O, and the image-side surface S4 of the second lens L2 is concave at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is concave at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O The image-side surface S8 of the fourth lens L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens L5 is convex at the near optical axis O, and the image-side surface S10 of the fifth lens L5 is convex at the near optical axis O; the object-side surface S11 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis O; the object-side surface S13 of the seventh lens L7 is convex at the near optical axis O, and the image-side surface S14 of the seventh lens L7 is convex at the near optical axis O.

[0078] Specifically, the Y radius in Table 1a is the radius of curvature of the object-side or image-side surface of the corresponding surface number at optical axis O. The first value in the "Thickness" column for a lens is the thickness of the lens along optical axis O, and the second value is the distance from the image-side surface to the next surface along optical axis O. The value for the aperture STO in the "Thickness" column is the distance from the aperture STO to the vertex of the next surface along optical axis O (the vertex refers to the intersection of the surface with the optical axis O). By default, the direction from the object-side surface S1 of the first lens L1 to the image-side surface S14 of the last lens is the positive direction of optical axis O. A negative value indicates that the aperture STO is located on the image side of the next vertex. A positive value for the aperture STO thickness indicates that the aperture STO is located on the object side of the next vertex. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 1a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens in Table 1a is 588.0000 nm.

[0079] In the first embodiment, both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical surfaces. Table 1b shows the conic constant k, high-order coefficients A3, A4, A5, A6, A7, and A8 of the aspherical mirror surface S13, and the conic constant k, high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspherical mirror surface S14 that can be used in the first embodiment.

[0080] Table 1a

[0081]

[0082] Table 1b

[0083]

[0084]

[0085] See also Figure 2 (A) in Figure 2 (A) shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 588.0000nm, 486.0000nm, and 656.0000nm. The horizontal axis along the X-axis represents the focus offset in mm, and the vertical axis along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in FIG, the spherical aberration value of the optical lens 100 in the first embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better. Figure 2 (B) in Figure 2(B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 588.0000 nm. The horizontal axis along the X-axis represents the focus offset in mm, and the vertical axis along the Y-axis represents the field angle in degrees. In the astigmatism diagram, T represents the curvature of the imaging surface IMG in the sub-arc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. Figure 2 As can be seen from (B) in FIG, at this wavelength, the astigmatism of the optical lens 100 is well compensated. Figure 2 (C) in Figure 2 (C) shows the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 588.0000 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the field of view, with the unit being deg. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the distortion of the optical lens 100 is well corrected.

[0086] Second embodiment

[0087] The structural diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows: Figure 3 As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the second embodiment are given in Table 2a below, and the definitions of each parameter can be derived from the description of the aforementioned embodiment and are not repeated here. It is understandable that the units of the Y radius, thickness, and effective focal length in Table 2a are all mm. The reference wavelength of the refractive index, Abbe number, and effective focal length of each lens in Table 2a is 588.0000 nm. In the second embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 2b gives the conic constant k, high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in the second embodiment.

[0088] Table 2a

[0089]

[0090]

[0091] Table 2b

[0092]

[0093] See also Figure 4 ,Depend on Figure 4As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the second embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0094] Third embodiment

[0095] The structural diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the third embodiment are given in Table 3a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It is understood that the units of the Y radius, thickness, and effective focal length in Table 3a are all mm. The reference wavelength of the refractive index, Abbe number, and effective focal length of each lens in Table 3a is 588.0000 nm. In the third embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 3b gives the conic constant k, and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in the third embodiment.

[0096] Table 3a

[0097]

[0098] Table 3b

[0099]

[0100]

[0101] See also Figure 6 ,Depend on Figure 6 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the third embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0102] Fourth embodiment

[0103] The structural diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the fourth embodiment are given in Table 4a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It will be understood that the units of the Y radius, thickness, and effective focal length in Table 4a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens in Table 4a is 588.0000 nm. In the fourth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical. Table 4b gives the conic constant k and the higher-order coefficients A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16 that can be used for each aspherical mirror surface in the fourth embodiment.

[0104] Table 4a

[0105]

[0106] Table 4b

[0107]

[0108] See also Figure 8 ,Depend on Figure 8 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the fourth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0109] Fifth embodiment

[0110] The structural diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows: Figure 9As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the fifth embodiment are given in Table 5a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It will be understood that the units of the Y radius, thickness, and effective focal length in Table 5a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens in Table 5a is 588.0000 nm. In the fifth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical. Table 5b gives the conic constant k and the higher-order coefficients A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16 that can be used for each aspherical mirror surface in the fifth embodiment.

[0111] Table 5a

[0112]

[0113] Table 5b

[0114]

[0115] See also Figure 10 ,Depend on Figure 10 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the fifth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0116] Sixth embodiment

[0117] The structural diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows: Figure 11As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the sixth embodiment are given in Table 6a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It is understandable that the units of the Y radius, thickness, and effective focal length in Table 6a are all mm. The reference wavelength of the refractive index, Abbe number, and effective focal length of each lens in Table 6a is 588.0000 nm. In the sixth embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 6b gives the conic constant k, high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 that can be used for each aspherical mirror surface in the sixth embodiment.

[0118] Table 6a

[0119]

[0120] Table 6b

[0121] Surface number K A4 A6 A8 A10 13 -6.368120E+00 -2.352970E-03 2.089790E-03 -1.328290E-03 7.402190E-04 14 1.493750E+00 5.254990E-03 2.078550E-03 -1.130330E-03 4.917090E-04 Surface number A12 A14 A16 A18 A20 13 -2.329140E-04 3.737310E-05 -2.337410E-06 0.000000E+00 0.000000E+00 14 -9.887990E-05 9.346680E-06 -2.375900E-07 0.000000E+00 0.000000E+00

[0122] See also Figure 12 ,Depend on Figure 12 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the sixth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 12 (A) Figure 12 (B) and Figure 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0123] Seventh embodiment

[0124] The structural diagram of the optical lens 100 disclosed in the seventh embodiment of the present application is as follows: Figure 13As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the seventh embodiment are given in Table 7a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It is understood that the units of the Y radius, thickness, and effective focal length in Table 7a are all in mm. The reference wavelength of the refractive index, Abbe number, and effective focal length of each lens in Table 7a is 588.0000 nm. In the seventh embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical. Table 7b shows the conic constant k, high-order coefficients A3, A4, A5, A6, A7, and A8 applicable to the aspheric mirror surface S13 in the first embodiment, and the conic constant k, high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 of the aspheric mirror surface S14.

[0125] Table 7a

[0126]

[0127] Table 7b

[0128] Surface number K A3 A4 A5 A6 13 -1.239660E+01 -1.910170E-04 4.800340E-03 -6.138670E-05 -5.142560E-05 14 -8.666660E-01 2.910410E-03 -3.548940E-06 Surface number A7 A8 A10 A12 A14 13 -3.482640E-04 1.198020E-04 14 -1.525290E-05 9.062680E-06 -6.361060E-07 -1.122240E-07 Surface number A16 A18 A20 14 1.517930E-08 0.000000E+00 0.000000E+00

[0129] See also Figure 14 ,Depend on Figure 14 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the seventh embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0130] Eighth embodiment

[0131] The structural diagram of the optical lens 100 disclosed in the eighth embodiment of the present application is as follows: Figure 15As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters in the eighth embodiment are given in Table 8a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It is understood that the units of the Y radius, thickness, and effective focal length in Table 8a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens in Table 8a is 588.0000 nm. In the eighth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical. Table 8b gives the conic constant k and the higher-order coefficients A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, and A16 that can be used for each aspherical mirror surface in the fourth embodiment.

[0132] Table 8a

[0133]

[0134] Table 8b

[0135] Surface number K A3 A4 A5 A6 13 -4.38362E+01 -1.58636E-02 3.22726E-02 -1.26310E-02 -9.50628E-03 14 6.61016E-01 1.73422E-02 -8.15083E-03 -1.12520E-02 2.54575E-02 Surface number A7 A8 A9 A10 A11 13 1.05750E-02 -1.51113E-03 -1.22376E-03 -1.59540E-04 3.90951E-04 14 -1.39709E-02 8.58787E-04 1.64176E-03 -3.42469E-05 -4.03422E-04 Surface number A12 A13 A14 A15 A16 13 3.55443E-05 -7.83721E-05 5.98205E-06 5.11016E-06 -8.34522E-07 14 1.36544E-04 -3.27712E-06 -4.53138E-06 1.20731E-07 1.31973E-07

[0136] See also Figure 16 ,Depend on Figure 16 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the eighth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 16 (A) Figure 16 (B) and Figure 16 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0137] Ninth embodiment

[0138] The structural diagram of the optical lens 100 disclosed in the ninth embodiment of the present application is as follows: Figure 17As shown, the structure of the optical lens 100, the refractive power of each lens, and the surface profile of each lens can be referred to the first embodiment. Other parameters of the ninth embodiment are given in Table 9a below, and the definitions of each parameter can be derived from the description of the previous embodiment and are not repeated here. It should be understood that the units of the Y radius, thickness, and effective focal length in Table 9a are all in mm. The reference wavelength for the refractive index, Abbe number, and effective focal length of each lens in Table 9a is 588.0000 nm. In the ninth embodiment, both the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are aspherical. Table 9b gives the conic constant k, higher-order coefficients A3, A4, A5, A6, A7, and A8 applicable to the aspheric mirror surface S13 in the ninth embodiment, and the conic constant k, higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, and A20 applicable to the aspheric mirror surface S14.

[0139] Table 9a

[0140]

[0141] Table 9b

[0142] Surface number K A3 A4 A5 A6 13 -2.001970E+00 -2.893500E-03 1.338280E-03 -3.383190E-03 1.349750E-03 14 -1.430140E+00 2.275770E-03 1.711570E-04 Surface number A7 A8 A10 A12 A14 13 1.288200E-03 -2.997370E-04 14 1.628620E-04 4.323120E-05 -1.733870E-06 -1.774390E-06 Surface number A16 A18 A20 14 3.793980E-07 0.000000E+00 0.000000E+00

[0143] See also Figure 18 ,Depend on Figure 18 As can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B), and distortion curve diagram (C), the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 in the ninth embodiment are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 18 (A) Figure 18 (B) and Figure 18 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) in Figure 2 (B) in Figure 2 The contents described in (C) will not be repeated here.

[0144] Table 10 shows the values of FOV, TTL / F, TTL / IMGH, IMGH / F, FOV / FNO, CT12 / CT1, R3 / R4, F2 / F, CT3 / CT23, R5 / R6, F3 / F, TTL / CT4, CT4 / F, F4 / F, F5 / F6, F5 / F, CT5 / CT6, R13 / R14, SD14 / IMGH, SD1 / IMGH, FOV*F / IMGH, ∑CT / ∑AT, BFL / F, F1 / F, F6 / F, F7 / F, R1 / R2, R7 / R8, R9 / R10 and R11 / R12 in the optical lens 100 of the first to ninth embodiments.

[0145] Table 10

[0146]

[0147]

[0148] See also Figure 19 , the embodiment of the present application also discloses a camera module 200, which includes a photosensitive chip 201 and the above-mentioned optical lens 100, and the photosensitive chip 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used to receive the light signal of the subject and project it to the photosensitive chip 201, and the photosensitive chip 201 is used to convert the light signal corresponding to the subject into an image signal, which will not be described in detail here. It can be understood that the camera module 200 with the above-mentioned optical lens 100 also has all the technical effects of the above-mentioned optical lens 100, that is, it can meet the needs of both large field of view and miniaturization, and can adapt to photosensitive chips with higher pixels and larger size.

[0149] See also Figure 20 The embodiment of the present application further discloses a terminal device 300, which includes a housing 301 and the camera module 200 described above, wherein the camera module 200 is disposed in the housing 300. The terminal device 300 may be, but is not limited to, a car, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, an intelligent robot, a sweeping robot, etc. It can be understood that the terminal device 300 having the camera module 200 described above also has all the technical effects of the optical lens 100 described above, that is, it can meet the requirements of both a large field of view and miniaturization, and can adapt to photosensitive chips with higher pixels and larger sizes.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An optical lens, characterized in that: There are seven lenses with refractive power, including the following from the object side to the image side along the optical axis: a first lens having negative refractive power, wherein the object-side surface of the first lens is convex at the near optical axis, and the image-side surface of the first lens is concave at the near optical axis; a second lens element having negative refractive power, wherein the object-side surface of the second lens element is convex at the near optical axis, and the image-side surface of the second lens element is concave at the near optical axis; a third lens element having negative refractive power, wherein the object-side surface of the third lens element is convex at the near optical axis, and the image-side surface of the third lens element is concave at the near optical axis; a fourth lens element having positive refractive power, wherein the object-side surface of the fourth lens element is convex at the near optical axis, and the image-side surface of the fourth lens element is convex at the near optical axis; a fifth lens element having positive refractive power, wherein the object-side surface of the fifth lens element is convex at the near optical axis, and the image-side surface of the fifth lens element is convex at the near optical axis; a sixth lens element having negative refractive power, wherein the object-side surface of the sixth lens element is concave at the near optical axis, and the image-side surface of the sixth lens element is concave at the near optical axis; a seventh lens element having positive refractive power, wherein the object-side surface of the seventh lens element is convex near the optical axis, and the image-side surface of the seventh lens element is convex near the optical axis; The optical lens satisfies the following relationship: 190°≤FOV≤210°; 14≤TTL / F≤16; Wherein, FOV is the maximum field of view of the optical lens, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, and F is the effective focal length of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 7.5≤TTL / IMGH≤8; and / or, 1.8≤IMGH / F≤2.1; and / or, 95°≤FOV / FNO≤105°; Wherein, IMGH is half of the image height corresponding to the maximum field angle of the optical lens, and FNO is the aperture number of the optical lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.7≤CT12 / CT1≤2.7; and / or, 3.7≤R3 / R4≤35; and / or, -5≤F2 / F≤-2.6; Wherein, CT12 is the distance between the image-side surface of the first lens and the object-side surface of the second lens on the optical axis, CT1 is the thickness of the first lens on the optical axis, R3 is the radius of curvature of the object-side surface of the second lens at the optical axis, R4 is the radius of curvature of the image-side surface of the second lens at the optical axis, and F2 is the effective focal length of the second lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 0.4≤CT3 / CT23≤1.1; and / or, 1.5≤R5 / R6≤4.8; and / or, -10≤F3 / F≤-3; Wherein, CT3 is the thickness of the third lens on the optical axis, CT23 is the distance between the image side surface of the second lens and the object side surface of the third lens on the optical axis, R5 is the radius of curvature of the object side surface of the third lens at the optical axis, R6 is the radius of curvature of the image side surface of the third lens at the optical axis, and F3 is the effective focal length of the third lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 3≤TTL / CT4≤4.2; and / or, 3≤CT4 / F≤5; and / or, 2.4≤F4 / F≤3.1; Wherein, CT4 is the thickness of the fourth lens on the optical axis, and F4 is the effective focal length of the fourth lens.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -2≤F5 / F6≤-1.3; and / or, 2≤F5 / F≤2.9; and / or, 2.1≤CT5 / CT6≤2.82; Wherein, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, CT5 is the thickness of the fifth lens on the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: -4≤R13 / R14≤-1; and / or, 1.55≤SD14 / IMGH≤1.85; and / or, 4.9≤SD1 / IMGH≤5.21; Among them, R13 is the curvature radius of the object side surface of the seventh lens at the optical axis, R14 is the curvature radius of the image side surface of the seventh lens at the optical axis, SD1 is half of the maximum effective aperture of the object side surface of the first lens, SD14 is half of the maximum effective aperture of the image side surface of the seventh lens, and IMGH is half of the image height corresponding to the maximum field angle of the optical lens.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 100°≤FOV*F / IMGH≤110°; and / or, 2≤∑CT / ∑AT≤3.4; and / or, 1.6≤BFL / F≤2.2; Wherein, IMGH is half of the image height corresponding to the maximum field of view of the optical lens, ∑CT is the sum of the thicknesses of each lens from the first lens to the seventh lens on the optical axis, ∑AT is the sum of the air spaces between adjacent lenses from the first lens to the seventh lens on the optical axis, and BFL is the minimum distance between the image-side surface of the seventh lens and the imaging plane of the optical lens in a direction parallel to the optical axis.

9. A camera module, characterized in that: The camera module includes a photosensitive chip and an optical lens according to any one of claims 1 to 8, and the photosensitive chip is arranged on the image side of the optical lens.

10. A terminal device, characterized in that: It comprises a shell and a camera module as claimed in claim 9, wherein the camera module is arranged in the shell.

Images