Optical lens, camera module and electronic device

Abstract

The invention discloses an optical lens, a camera module and an electronic device. The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens, the first lens element with positive refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The second lens element with negative refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The fourth lens element with positive refractive power has an object-side surface being concave in a paraxial region and an image-side surface being convex in a paraxial region. The fifth lens element with negative refractive power has an object-side surface being concave in a paraxial region thereof. A sixth lens element with positive refractive power; the seventh lens element with positive refractive power has an object-side surface being convex in a paraxial region and an image-side surface being concave in a paraxial region. The eighth lens element with negative refractive power has an image-side surface being concave in a paraxial region thereof. According to the optical lens, the imaging quality can be ensured while the miniaturization design of the optical lens is met.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of mobile electronic devices such as smart phones and tablet computers, people have higher and higher requirements for the camera lenses mounted thereon. On the one hand, people mostly pursue the thinness of smart phones, and the total length of the camera lens needs to be shortened synchronously; on the other hand, people have higher and higher requirements for the pixels of shooting, and need to meet the high pixels while taking into account the short total length of the camera lens. However, when the size of the electronic device is reduced, the imaging quality of the optical lens cannot be guaranteed. SUMMARY

[0003] In view of the above, it is necessary to provide an optical lens, a camera module and an electronic device to guarantee the imaging quality while meeting the miniaturized design.

[0004] An optical lens is provided in a first aspect of the embodiments of the present application, which has eight lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens arranged in order from the object side to the image side along the optical axis; the first lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis; the second lens has negative refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis; the fourth lens has positive refractive power, the object side surface thereof is concave at the near optical axis, and the image side surface thereof is convex at the near optical axis; the fifth lens has negative refractive power, the object side surface thereof is concave at the near optical axis; the sixth lens has positive refractive power; the seventh lens has positive refractive power, the object side surface thereof is convex at the near optical axis, and the image side surface thereof is concave at the near optical axis; the eighth lens has negative refractive power, and the image side surface thereof is concave at the near optical axis; the optical lens satisfies the following relationship: 80°≤FOV≤89.2°; 1.2<TTL / ImgH<1.41; wherein FOV is the full field of view of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and ImgH is half the length of the diagonal of the effective pixel area on the imaging surface of the optical lens.

[0005] The above-mentioned optical lens, by providing a first lens with positive refractive power and a second lens with negative refractive power, the object side surface of the first lens is convex at the near optical axis, the image side surface of the first lens is concave at the near optical axis, 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. This is beneficial to the incident convergence of light over a large field of view and the increase of the field of view angle. It is also beneficial to compress the incident angle of light at the aperture position, reduce pupil aberration, improve imaging quality, and ensure a small lens diameter. By providing a third lens with refractive power, a fourth lens with positive refractive power, and a fifth lens with negative refractive power, the object side surface of the fourth lens is concave at the near optical axis, the image side surface of the fourth lens is convex at the near optical axis, and the object side surface of the fifth lens is concave at the near optical axis. This is beneficial to the camera lens group having the characteristics of a compact structure and a large aperture, and correcting the distortion, spherical aberration, and astigmatism generated by the front lens group. The inclusion of a sixth lens element with positive refractive power helps converge light entering the optical lens from the front lens and delays light entering the lens from the front lens. The inclusion of a seventh lens element with positive refractive power, whose object-side surface is convex near the optical axis and whose image-side surface is concave near the optical axis, shortens the overall length, corrects aberrations, and suppresses the angle of light emission. The inclusion of an eighth lens element with negative refractive power, whose image-side surface is concave near the optical axis, helps achieve a large image plane and achieves higher light throughput in the external field of view.

[0006] Furthermore, by making the optical lens meet 80°≤FOV≤89.2°, the maximum field angle of the optical lens can be controlled within a reasonable range, so that the optical lens has a large field angle characteristic, which can avoid introducing excessive aberrations, and is conducive to the optical lens to obtain sufficient field of view while meeting the characteristics of miniaturization, thereby making the optical lens have the characteristics of high pixel and high definition. <TTL / ImgH<1.41,有利于提升光学镜头在全视场的解像力,提升边缘视场的成像品质;同时,可以使光学镜头具有超薄特性,有利于使得光学镜头具有较小的光学总长,拍摄中焦物距景物及摄像镜头小型化更具优势。

[0007] A second aspect of an embodiment of the present application provides a camera module, comprising: the optical lens as described above; and an image sensor, disposed on the image side of the optical lens.

[0008] The above-mentioned camera module includes the above-mentioned optical lens, which can ensure imaging quality while meeting the miniaturization design of the optical lens.

[0009] A third aspect of an embodiment of the present application provides an electronic device, comprising: a housing; and the above-mentioned camera module, wherein the camera module is mounted on the housing.

[0010] The electronic device described above comprises the optical lens described above, and can guarantee imaging quality while meeting the miniaturized design of the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic diagram of an optical lens of a first embodiment of the present application.

[0012] Figure 2 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the first embodiment of the present application.

[0013] Figure 3 is a structural schematic diagram of an optical lens of a second embodiment of the present application.

[0014] Figure 4 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the second embodiment of the present application.

[0015] Figure 5 is a structural schematic diagram of an optical lens of a third embodiment of the present application.

[0016] Figure 6 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the third embodiment of the present application.

[0017] Figure 7 is a structural schematic diagram of an optical lens of a fourth embodiment of the present application.

[0018] Figure 8 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the fourth embodiment of the present application.

[0019] Figure 9 is a structural schematic diagram of an optical lens of a fifth embodiment of the present application.

[0020] Figure 10 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the fifth embodiment of the present application.

[0021] Figure 11 is a structural schematic diagram of an optical lens of a sixth embodiment of the present application.

[0022] Figure 12 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens of the sixth embodiment of the present application.

[0023] Figure 13 is a structural schematic diagram of a camera module of an embodiment of the present application.

[0024] Figure 14 is a structural schematic diagram of an electronic device of an embodiment of the present application.

[0025] Main element symbol explanation: optical lens 100, optical axis O1, parallel line segment O2, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, object side S1, S3, S5, S7, S9, S11, S13, S15, image side S2, S4, S6, S8, S10, S12, S14, S16, diaphragm STO, filter IR, imaging surface IMG, camera module 200, image sensor 201, electronic device 300, shell 301. DETAILED DESCRIPTION

[0026] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference numbers represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0027] Please refer to Figure 1 The optical lens 100 provided by the embodiments of the present application has eight lenses with refractive power, including the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 arranged in order along the optical axis O1 from the object side to the image side.

[0028] The first lens L1 has positive refractive power, the object side S1 thereof is convex at the near optical axis O1, and the image side S2 thereof is concave at the near optical axis O1. The second lens L2 has negative refractive power, the object side S3 thereof is convex at the near optical axis O1, and the image side S4 thereof is concave at the near optical axis O1. The fourth lens L4 has positive refractive power, the object side S7 thereof is concave at the near optical axis O1, and the image side S8 thereof is convex at the near optical axis O1. The fifth lens L5 has negative refractive power, the object side S9 thereof is concave at the near optical axis O1. The sixth lens L6 has positive refractive power. The seventh lens L7 has positive refractive power, the object side S13 thereof is convex at the near optical axis O1, and the image side S14 thereof is concave at the near optical axis O1. The eighth lens L8 has negative refractive power, and the image side S16 thereof is concave at the near optical axis O1.

[0029] The optical lens 100 has the advantages that: by arranging the first lens L1 with positive refractive power and the second lens L2 with negative refractive power, the object side S1 of the first lens L1 is convex at the near optical axis O1, the image side of the first lens L1 is concave at the near optical axis O1, the object side of the second lens L2 is convex at the near optical axis O1, and the image side S2 of the second lens L2 is concave at the near optical axis O1, which is beneficial to the incidence and collection of light rays in a large field of view range and the increase of the field of view angle, and is also beneficial to the compression of the incidence angle of light rays at the aperture position, the reduction of the pupil aberration, the improvement of the imaging quality, and the guarantee of a small lens aperture. By arranging the third lens L3 with refractive power, the fourth lens L4 with positive refractive power, and the fifth lens L5 with negative refractive power, the object side S7 of the fourth lens L4 is concave at the near optical axis O1, the image side S8 of the fourth lens L4 is convex at the near optical axis O1, and the object side S9 of the fifth lens L5 is concave at the near optical axis O1, which is beneficial to the camera lens group having the characteristics of compact structure and large aperture, and correcting the distortion, spherical aberration, and astigmatism generated by the front group of lenses. By arranging the sixth lens L6 with positive refractive power, it is beneficial to the convergence of light rays incident from the front lens into the optical lens, and beneficial to the delay of light rays incident from the front lens into the lens. By arranging the seventh lens L7 with positive refractive power, the object side S13 of the seventh lens L7 is convex at the near optical axis O1, and the image side S14 of the seventh lens L7 is concave at the near optical axis O1, which can shorten the total length and correct aberration, and can also compress the exit angle of light rays. By arranging the eighth lens L8 with negative refractive power, the image side S16 of the eighth lens L8 is concave at the near optical axis O1, which is beneficial to the realization of the large image surface characteristic and the acquisition of high light flux in the outer field of view.

[0030] Further, the optical lens 100 satisfies the following relationship: 80°≤FOV≤89.2°; for example, FOV is 80.2°, 82°, 84°, 86°, 88°, 89°, 89.19°, etc. Wherein, FOV is the maximum field of view angle of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the maximum field of view angle of the optical lens 100 can be controlled within a reasonable range, so that the optical lens 100 has the characteristics of large field of view angle, can avoid introducing excessive aberration, is beneficial to the realization of miniaturization while obtaining sufficient field of view, and thus has the characteristics of high pixels and high definition.

[0031] Meanwhile, the optical lens 100 satisfies the following relationship: 1.2 < TTL / ImgH < 1.41; for example, TTL / ImgH is 1.21, 1.24, 1.28, 1.3, 1.33, 1.37, 1.4, etc. Wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O1, and ImgH is half of the length of the diagonal line of the effective pixel area on the imaging surface IMG of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the resolution of the optical lens 100 in the full field of view is improved, and the imaging quality of the edge field of view is improved. At the same time, the optical lens 100 has the characteristics of ultra-thin, which is advantageous to make the optical lens 100 have a small total optical length, and the compactness of the shooting intermediate focal length object and the camera lens is more advantageous.

[0032] In some embodiments, the optical lens 100 satisfies the following relationship: 0.9 < f1 / f < 1.1; for example, f1 / f is 0.91, 0.94, 0.97, 1.0, 1.03, 1.06, 1.09, etc. Wherein, f1 is the effective focal length of the first lens L1, and f is the effective focal length of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the ratio of the focal length of the first lens L1 and the focal length of the optical lens 100 can be reasonably configured. For the entire optical lens 100, the refractive power of the first lens L1 will not be too strong, avoiding introducing too much spherical aberration, so that the optical lens 100 has good imaging quality.

[0033] In some embodiments, the optical lens 100 satisfies the following relationship: -3.6 < f2 / f < -3; for example, f2 / f is -3.59, -3.5, -3.4, -3.3, -3.2, -3.1, etc. Wherein, f2 is the effective focal length of the second lens L2. By making the optical lens 100 satisfy the above relationship, it is advantageous to reduce the deflection angle of light in the second lens L2, while the negative refractive power provided by the second lens L2 can effectively balance the spherical aberration of the optical lens 100, effectively correct the aberration, thereby realizing good imaging quality. At the same time, it is also advantageous to reasonably configure the center thickness of the second lens L2, thereby shortening the total length of the optical lens 100, and additionally it is also advantageous to expand the field of view angle of the optical lens 100.

[0034] In some embodiments, the optical lens 100 satisfies the following relationship: 7<|f3| / f; for example, |f3| / f is 7.1, 10, 30, 50, 70, 90, 95, etc. Wherein, f3 is the effective focal length of the third lens L3. Since the light rays are emitted by the first lens L1 and the second lens L2 with strong refractive power, it often leads to a large field curvature when the edge field of view light rays enter the imaging surface IMG. Therefore, by reasonably setting the effective focal length of the third lens L3, the incident light rays in front can be effectively collected and compressed, so that the light rays smoothly transition into the rear optical lens 100, reduce the generation of aberration, thereby improving the imaging quality of the optical lens 100.

[0035] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7<f4 / f<2.7; for example, f4 / f is 1.71, 1.9, 2.1, 2.3, 2.5, 2.69, etc. Wherein, f4 is the effective focal length of the fourth lens L4. By making the optical lens 100 satisfy the above relationship, it is beneficial for the refractive power of the fourth lens L4 in the optical lens 100 to be properly matched, the surface type design of the fourth lens L4 is more simple and flexible, the aberration is reduced, and it is beneficial for the balance of aberration correction and imaging quality of the optical lens 100 as a whole.

[0036] In some embodiments, the optical lens 100 satisfies the following relationship: -3.1<f5 / f<-1.9; for example, f5 / f is -3.0, -2.8, -2.6, -2.4, -2.2, -2.0, etc. Wherein, f5 is the effective focal length of the fifth lens L5. By making the optical lens 100 satisfy the above relationship, it is beneficial for the fifth lens L5 to diffuse the light beam smoothly, laying a foundation for subsequent large image surface imaging.

[0037] In some embodiments, the optical lens 100 satisfies the following relationship: 4<f6 / f<16; for example, f6 / f is 4.1, 7.0, 9.0, 11, 13, 15.9, etc. Wherein, f6 is the effective focal length of the sixth lens L6. By limiting the relationship between the focal length of the sixth lens L6 and the effective focal length of the optical lens 100, it is helpful to correct the aberration of the optical lens 100, while reducing the temperature sensitivity of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0038] In some embodiments, the optical lens 100 satisfies the following relationship: 1.3 < f7 / f < 1.5; for example, f7 / f is 1.31, 1.35, 1.37, 1.40, 1.45, 1.49, etc. Wherein, f7 is the effective focal length of the seventh lens L7. By making the optical lens 100 satisfy the above relationship, the positive refractive power of the seventh lens L7 of the optical lens 100 will not become too strong, so that the angle between the normal lines of the object side S13 and the image side S14 of the seventh lens L7 and the incident light will not become too large, and the occurrence of high-order aberrations can be further inhibited.

[0039] In some embodiments, the optical lens 100 satisfies the following relationship: -1.4 < f / f8 < -1.2; for example, f / f8 is -1.39, -1.35, -1.3, -1.28, -1.25, -1.21, etc. Wherein, f8 is the effective focal length of the eighth lens L8. By constraining the ratio of the focal length of the eighth lens L8 to the focal length of the optical lens 100, the aberrations that the sixth lens L6 and the seventh lens L7 cannot correct can be corrected to balance the aberrations of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0040] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < f12 / f < 1.6; for example, f12 / f is 1.21, 1.25, 1.3, 1.38, 1.42, 1.51, 1.59, etc. Wherein, f12 is the combined effective focal length of the first lens L1 and the second lens L2. By making the optical lens 100 satisfy the above relationship, the first lens L1 and the second lens L2 can be mutually regulated to control aberrations, facilitate the reception of large-angle incident light, and control the smooth entry of incident light into the optical lens 100, thereby reducing the tolerance sensitivity of the optical lens 100.

[0041] In some embodiments, the optical lens 100 satisfies the following relationship: 5 < |f345| / f; for example, |f345| / f is 5.1, 10, 50, 100, 200, 230, etc. Wherein, f345 is the combined effective focal length of the third lens L3, the fourth lens L4, and the fifth lens L5. By making the optical lens 100 satisfy the above relationship, the third lens L3 to the fifth lens L5 can be cooperatively matched to gradually eliminate chromatic aberration, thereby improving the imaging quality.

[0042] In some embodiments, the optical lens 100 satisfies the following relationship: -12 < f678 / f < -6; for example, f678 / f is -11.9, -10, -9, -8, -7, -6.1, etc. Wherein, f678 is the combined effective focal length of the sixth lens L6, the seventh lens L7 and the eighth lens L8. By making the optical lens 100 satisfy the above relationship, it is beneficial for the sixth lens L6 to the eighth lens L8 to cooperate with each other, step by step to eliminate chromatic aberration, also beneficial to adjust the back focus, and control the off-axis aberration and the light ray incident angle on the imaging surface IMG.

[0043] In some embodiments, the optical lens 100 satisfies the following relationship: 2.1 < f / R11 < 2.4; for example, f / R11 is 2.11, 2.15, 2.2, 2.25, 2.3, 2.39, etc. Wherein, R11 is the curvature radius of the object side S1 of the first lens L1 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 1.7 < R12 / f < 2.1; for example, R12 / f is 1.71, 1.751, 1.8, 1.88, 1.98, 2.09, etc. Wherein, R12 is the curvature radius of the image side S2 of the first lens L1 at the optical axis O1. At least one of the above relationships is satisfied, which is beneficial to maintain the astigmatism of the first lens L1 within a reasonable range, so that the optical lens 100 has good imaging quality.

[0044] In some embodiments, the optical lens 100 satisfies the following relationship: 0.9 < R21 / f < 1.4; for example, R21 / f is 0.91, 1.0, 1.05, 1.15, 1.25, 1.35, 1.39, etc. Wherein, R21 is the curvature radius of the object side S3 of the second lens L2 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < f / R22 < 1.6; for example, f / R22 is 1.21, 1.20, 1.25, 1.30, 1.4, 1.59, etc. Wherein, R22 is the curvature radius of the image side S4 of the second lens L2 at the optical axis O1. At least one of the above relationships is satisfied, which is beneficial to maintain the astigmatism of the second lens L2 within a reasonable range, and effectively balance the astigmatism generated by the first lens L1, so that the optical lens 100 has good imaging quality.

[0045] In some embodiments, the optical lens 100 satisfies the following relationship: 4<|R31| / f; for example, |R31| / f is 4.1, 10, 15, 18, 22, 25, etc. Wherein R31 is the radius of curvature of the object side S5 of the third lens L3 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 3.9<|R32| / f; for example, |R32| / f is 3.91, 10, 15, 20, 28, 35, etc. Wherein R32 is the radius of curvature of the image side S6 of the third lens L3 at the optical axis O1. Satisfying at least one of the above relationships helps to maintain the surface shape of the third lens L3 within a reasonable range, and effectively balances the aberrations generated by the first lens L1 and the second lens L2, so that the optical lens 100 has good imaging quality.

[0046] In some embodiments, the optical lens 100 satisfies the following relationship: -23<R41 / f<-2.8; for example, R41 / f is -22.9, -15, -10, -8, -5, -2.81, etc. Wherein R41 is the radius of curvature of the object side S7 of the fourth lens L4 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: -1.2<f / R42<-0.9; for example, f / R42 is -1.19, -1.0, -0.99, -0.96, -0.93, -0.91, etc. Wherein R42 is the radius of curvature of the image side S8 of the fourth lens L4 at the optical axis O1. Satisfying at least one of the above relationships helps to maintain the surface shape of the fourth lens L4 within a reasonable range, helps to cooperate with the first lens L1 to the third lens L3 to become a symmetrical structure, helps to eliminate off-axis aberrations, so that the optical lens 100 has good imaging quality.

[0047] In some embodiments, the optical lens 100 satisfies the following relationship: -2.5<R51 / f<-1.1; for example, R51 / f is -2.49, -2.2, -2.0, -1.7, -1.5, -1.11, etc. Wherein R51 is the radius of curvature of the object side S9 of the fifth lens L5 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 12<|R52| / f; for example, |R52| / f is 12.1, 15, 20, 25, 30, 35, etc. Wherein R52 is the radius of curvature of the image side S10 of the fifth lens L5 at the optical axis O1. Satisfying at least one of the above relationships helps to maintain the refractive power of the fifth lens L5 within a reasonable range, avoids the fifth lens L5 having too strong refractive power, and gently receives light from the object side, so that the optical lens 100 has good imaging quality.

[0048] In some embodiments, the optical lens 100 satisfies the following relationship: 2.4 < |R61| / f; for example, |R61| / f is 2.41, 5, 10, 14, 18, 20, etc. Wherein R61 is the radius of curvature of the object side S11 of the sixth lens L6 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 5 < |R62| / f; for example, |R62| / f is 5.1, 8, 13, 16, 20, 25, etc. Wherein R62 is the radius of curvature of the image side S12 of the sixth lens L6 at the optical axis O1. At least one of the above-mentioned relationships is satisfied, which is conducive to maintaining the surface type of the sixth lens L6 within a reasonable range, balancing the overall performance and the seventh lens L7, the eighth lens L8 to correct aberrations, so that the optical lens 100 has good imaging quality.

[0049] In some embodiments, the optical lens 100 satisfies the following relationship: 1.4 < f / R71 < 1.7; for example, f / R71 is 1.41, 1.45, 1.49, 1.521, 1.58, 1.65, 1.69, etc. Wherein R71 is the radius of curvature of the object side S13 of the seventh lens L7 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 2.7 < R72 / f < 8; for example, R72 / f is 2.71, 3, 4, 5, 6, 7.9, etc. Wherein R72 is the radius of curvature of the image side S14 of the seventh lens L7 at the optical axis O1. At least one of the above-mentioned relationships is satisfied, which is conducive to maintaining the surface type of the seventh lens L7 within a reasonable range, balancing the overall performance and the sixth lens L6, the eighth lens L8 to correct aberrations, so that the optical lens 100 has good imaging quality.

[0050] In some embodiments, the optical lens 100 satisfies the following relationship: 4.5 < R72 / R71 < 10.6; for example, R72 / R71 is 4.51, 5, 6, 7, 8, 9, 10.59, etc. By making the optical lens 100 satisfy the above-mentioned relationship, it is conducive to reasonably configuring the ratio of the radii of curvature of the object side S13 and the image side S14 of the seventh lens L7 at the optical axis O1, reasonably setting the difference between the two radii of curvature, adjusting the refractive power within a reasonable range, and reducing the deflection angle of the full field of view of the optical lens 100. Control the generation and correction of aberrations.

[0051] In some embodiments, the optical lens 100 satisfies the following relationship: 7 < |R81| / f; for example, |R81| / f is 7.1, 10, 15, 20, 28, 35, etc. Wherein, R81 is the radius of curvature of the object side S15 of the eighth lens L8 at the optical axis O1. In some embodiments, the optical lens 100 satisfies the following relationship: 2.1 < f / R82 < 2.6; for example, f / R82 is 2.11, 2.13, 2.15, 2.3, 2.4, 2.5, etc. Wherein, R82 is the radius of curvature of the image side S16 of the eighth lens L8 at the optical axis O1. Satisfying at least one of the above relationships, the surface type of the eighth lens L8 is maintained within a reasonable range, and the overall performance is balanced with the sixth lens L6 and the seventh lens L7 to correct aberrations, so that the optical lens 100 has good imaging quality.

[0052] In some embodiments, the optical lens 100 satisfies the following relationship: 1.6 ≤ FNO < 1.8; for example, FNO is 1.61, 1.64, 1.67, 1.71, 1.75, 1.79, etc. Wherein, FNO is the aperture number of the optical lens 100. By making the optical lens 100 satisfy the above relationship, the optical lens 100 has the characteristics of a large aperture, sufficient light quantity, and can make the image captured by the optical lens 100 clearer, so as to be applicable to shooting scenes with low light intensity such as high-quality night scenes and starry sky scenes. In addition, it can also avoid introducing excessive aberrations, so that the optical lens 100 achieves overall balance.

[0053] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < TTL / f < 1.3; for example, TTL / f is 1.21, 1.23, 1.25, 1.27, 1.28, 1.29, etc. By making the optical lens 100 satisfy the above relationship, the ratio of the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O1 and the effective focal length of the optical lens 100 is reasonably configured, so that the optical lens 100 has a smaller total optical length, realizes the characteristics of miniaturization, and also makes the optical lens 100 have better telephoto effect.

[0054] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < f / ImgH < 1.2; for example, f / ImgH is 1.01, 1.05, 1.07, 1.11, 1.13, 1.16, 1.19, etc. By making the optical lens 100 satisfy the above relationship, the distortion generated by the optical lens 100 can be effectively corrected, thereby improving the imaging quality of the optical lens 100 while reducing the manufacturing difficulty of the optical lens 100; in addition, it can help to control the focal length of the optical lens 100 within a reasonable range, and ensure that the optical lens 100 has sufficient light collection area and sufficient field of view angle, thereby simultaneously satisfying the characteristics of large field of view angle and large image surface.

[0055] In some embodiments, the optical lens 100 satisfies the following relationship: 44° < FOV / FNO < 56°; for example, FOV / FNO is 44.1°, 47°, 49°, 51°, 53°, 55.9°, etc. By making the optical lens 100 satisfy the above relationship, the field of view angle and light flux of the optical lens 100 can be reasonably controlled, the distortion of the edge field of view can be improved, and the light flux of the optical lens 100 can be prevented from being too large. If it is higher than the upper limit of the above relationship, the field of view angle of the optical lens 100 is too large, causing the edge field of view distortion to be too large, and the image periphery will appear distorted. In addition, it will also cause the aperture number to be too small, so that the light flux of the optical lens 100 is too large, causing non-effective light to also reach the imaging surface IMG, resulting in aberrations such as spherical aberration, field curvature, etc. at the imaging (especially at the edge field of view), thereby causing the imaging performance of the optical lens 100 to decline; if it is lower than the lower limit of the above relationship, the light flux of the optical lens 100 is insufficient, and the clarity of the captured image decreases.

[0056] In some embodiments, the optical lens 100 satisfies the following relationship: 2.9 < CT4 / CT3 < 3.1; for example, CT4 / CT3 is 2.91, 2.94, 2.98, 3.02, 3.05, 3.09, etc. Wherein CT4 is the thickness of the fourth lens L4 on the optical axis O1, and CT3 is the thickness of the third lens L3 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the ratio of the thickness of the third lens L3 on the optical axis O1 to the thickness of the fourth lens L4 on the optical axis O1 can be controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, and maintain the ultra-thin characteristics of the fourth lens L4.

[0057] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < CT6 / CT5 < 1.7; for example, CT6 / CT5 is 1.1, 1.2, 1.3, 1.4, 1.5, 1.69, etc. Wherein, CT6 is the thickness of the sixth lens L6 on the optical axis O1, and CT5 is the thickness of the fifth lens L5 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the thickness of the sixth lens L6 on the optical axis O1 is thin, which is a key lens for correcting the edge field distortion and improving the imaging performance, the ratio of the thickness of the fifth lens L5 on the optical axis O1 to the thickness of the sixth lens L6 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, maintain the ultra-thin characteristics of the sixth lens L6, and the lens size difference will not be too large, which is beneficial to the smooth transmission of the expanded light, avoids introducing excessive aberration, and is beneficial to the spatial arrangement of the lens.

[0058] In some embodiments, the optical lens 100 satisfies the following relationship: 1.2 < CT2 / CT3 < 1.8; for example, CT2 / CT3 is 1.21, 1.3, 1.4, 1.5, 1.6, 1.79, etc. Wherein, CT2 is the thickness of the second lens L2 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the thickness of the second lens L2 on the optical axis O1 is thin, which is a key lens for correcting the edge field distortion and improving the imaging performance, the ratio of the thickness of the first lens L1 on the optical axis O1 to the thickness of the second lens L2 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, and maintain the ultra-thin characteristics of the third lens L3.

[0059] In some embodiments, the optical lens 100 satisfies the following relationship: 1.4 < CT1 / CT4 < 1.6; for example, CT1 / CT4 is 1.41, 1.45, 1.5, 1.52, 1.55, 1.59, etc. Wherein, CT1 is the thickness of the first lens L1 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the ratio of the thickness of the fourth lens L4 on the optical axis O1 to the thickness of the first lens L1 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively reduce the size of the optical lens 100, maintain the miniaturization characteristics, and also beneficial to avoid the imbalance of the spatial configuration of each lens in the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0060] In some embodiments, the optical lens 100 satisfies the following relationship: 2.7≤CT1 / CT2<3.9; for example, CT1 / CT2 is 2.7, 2.71, 2.9, 3.1, 3.3, 3.6, 3.89, etc. By making the optical lens 100 satisfy the above relationship, the ratio of the thickness of the first lens L1 on the optical axis O1 to the thickness of the second lens L2 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, maintain the ultra-thin characteristics of the second lens L2, and is beneficial to the second lens L2 becoming a key lens for correcting the edge field distortion and improving the imaging performance.

[0061] In some embodiments, the optical lens 100 satisfies the following relationship: 1.3<CT4 / CT5<2.3; for example, CT4 / CT5 is 1.31, 1.5, 1.7, 1.9, 2.1, 2.29, etc. By making the optical lens 100 satisfy the above relationship, the fifth lens L5 is thin on the optical axis O1, becomes a key lens for correcting the edge field distortion and improving the imaging performance, and the ratio of the thickness of the fourth lens L4 on the optical axis O1 to the thickness of the fifth lens L5 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, and maintain the ultra-thin characteristics of the fifth lens L5.

[0062] In some embodiments, the optical lens 100 satisfies the following relationship: 1<CT7 / CT6<1.4; for example, CT7 / CT6 is 1.1, 1.13, 1.17, 1.21, 1.251, 1.35, 1.39, etc. Wherein, CT7 is the thickness of the seventh lens L7 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the seventh lens L7 is thin on the optical axis O1, becomes a key lens for correcting the edge field distortion and improving the imaging performance, and the ratio of the thickness of the sixth lens L6 on the optical axis O1 to the thickness of the seventh lens L7 on the optical axis O1 is controlled within a reasonable range, which is beneficial to effectively balance the optical path difference of the optical lens 100, reduce the size of the optical lens 100, maintain the ultra-thin characteristics of the seventh lens L7, reduce the overall thickness, and avoid reducing the yield rate due to the excessive thinness of a single lens.

[0063] In some embodiments, the optical lens 100 satisfies the following relationship: 1<CT7 / CT8<1.3; for example, CT7 / CT8 is 1.1, 1.14, 1.17, 1.21, 1.25, 1.29, etc. Wherein, CT8 is the thickness of the eighth lens L8 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the thicknesses of the seventh lens L7 and the eighth lens L8 are adapted to each other, which is beneficial to reduce the overall thickness and avoid reducing the yield rate due to the excessive thinness of a single lens.

[0064] In some embodiments, the optical lens 100 satisfies the following relationship: <AT78max / AT78min<36;例如AT78max / AT78min为14.11、15、20、25、30、33、35.9等。其中,AT78max为第七透镜L7和第八透镜L8于光轴O1方向上的最大间隔,AT78min为第七透镜L7和第八透镜L8于光轴O1方向上的最小间隔。如 Figure 1 As shown, the direction along the optical axis O1 is defined as a direction parallel to the optical axis O1, for example, the direction of a parallel line segment O2 parallel to the optical axis O1. One end of the parallel line segment O2 is located on the image-side surface S14 of the seventh lens element L7, and the other end of the parallel line segment O2 is located on the object-side surface S15 of the eighth lens element L8. The spacing between the seventh lens L7 and the eighth lens element L8 along the direction along the parallel line segment O2 is between the maximum spacing between the seventh lens L7 and the eighth lens element L8 along the optical axis O1 and AT78min, which is the minimum spacing between the seventh lens L7 and the eighth lens element L8 along the optical axis O1. The maximum spacing between the seventh lens L7 and the eighth lens L8 along the optical axis O1 is the spacing between the seventh lens L7 and the eighth lens L8 along the optical axis O1.

[0065] By ensuring that optical lens 100 satisfies the aforementioned relationship, the air gap or curved surface shape between seventh lens element L7 and eighth lens element L8 has been extremely optimized. Even slight assembly tolerances can significantly affect the aberration balance, necessitating ultra-high-precision manufacturing and calibration processes to lock in the optimal spacing. Furthermore, seventh lens element L7 and eighth lens element L8 form a strongly coupled correction lens group. Leveraging their high refractive power interaction, they achieve static supercorrection for high-order spherical aberration, field curvature, and axial chromatic aberration while maintaining a fixed position. This effectively improves edge sharpness and overall uniformity, particularly in large aperture or wide-angle designs.

[0066] In some embodiments, the optical lens 100 satisfies the following relationship: 2.6 <DL / (CT1+CT2+CT3+CT4+CT5)<2.9;例如DL / (CT1+CT2+CT3+CT4+CT5)为2.61、2.67、2.71、2.78、2.82、2.86、2.89等。其中,DL为第一透镜L1的物侧面S1与第八透镜L8的像侧面S16于光轴O1上的距离。通过使光学镜头100满足上述关系式,能够合理控制第一透镜L1至第五透镜L5在光轴O1上的厚度,从而有助于前透镜组(第一透镜L1至第五透镜L5)和后透镜组(第六透镜L6至第八透镜L8)在光轴O1上的合理排布,进而有利于提高光学镜头100的镜筒的空间利用率。

[0067] In some embodiments, the optical lens 100 satisfies the following relationship: 2.5 < TTL / DL68 < 2.8; for example, TTL / DL68 is 2.51, 2.56, 2.61, 2.65, 2.75, 2.79, etc. Wherein, DL68 is the distance between the object side S15 of the sixth lens L6 and the image side S16 of the eighth lens L8 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the structural layout between the rear-end lenses (the sixth lens L6 to the eighth lens L8) can be further optimized to realize the miniaturization design of the optical lens 100; at the same time when satisfying the above relationship, the influence of aberration on the imaging quality of the optical lens 100 can be reduced, and the imaging quality of the optical lens 100 is further improved.

[0068] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 < TTL / DL < 1.2; for example, TTL / DL is 1.11, 1.12, 1.13, 1.14, 1.16, 1.19, etc. By making the optical lens 100 satisfy the above relationship, the ratio of the distance between the object side S1 of the first lens L1 and the image side S16 of the eighth lens L8 on the optical axis O1 and the distance between the object side S1 of the first lens L1 and the imaging surface IMG of the optical lens 100 on the optical axis O1 is reasonably configured, which increases the distance between the image side S16 of the eighth lens L8 and the imaging surface IMG of the optical lens 100 on the optical axis O1, and further increases the layout space of the module structure end under the premise of realizing the miniaturization of the optical lens 100.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 2.3 < TTL / DL15 < 2.6; for example, TTL / DL15 is 2.31, 2.37, 2.42, 2.50, 2.51, 2.59, etc. Wherein, DL15 is the distance between the object side S1 of the first lens L1 and the image side S of the fifth lens L5 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the structural layout between the front-end lenses (the first lens L1 to the fifth lens L5) can be further optimized to realize the miniaturization design of the optical lens 100; at the same time when satisfying the above relationship, the influence of aberration on the imaging quality of the optical lens 100 can be reduced, and the imaging quality of the optical lens 100 is further improved.

[0070] In some embodiments, the optical lens 100 satisfies the following relationship: 1.5 < SD72 / Yc72 < 1.7; for example, SD72 / Yc72 is 1.51, 1.55, 1.59, 1.63, 1.65, 1.69, etc. Wherein, SD72 is half of the maximum effective aperture of the image side S14 of the seventh lens L7, and Yc72 is the vertical height from the off-axis vertex of the image side S14 of the seventh lens L7 to the optical axis O1. By making the optical lens 100 satisfy the above relationship, it is beneficial to reasonably control the refractive power and thickness of the seventh lens L7 in all directions perpendicular to the optical axis O1, avoid the seventh lens L7 being too thick or too thin, reduce the incidence angle of light on the object side S13 of the seventh lens L7, and reduce the tolerance sensitivity of the optical lens 100.

[0071] In some embodiments, the optical lens 100 satisfies the following relationship: 2.7 < SD82 / Yc82 < 3; for example, SD82 / Yc82 is 2.71, 2.75, 2.8, 2.85, 2.92, 2.99, etc. Wherein, SD82 is half of the maximum effective aperture of the image side S16 of the eighth lens L8, and Yc82 is the vertical height from the off-axis vertex of the image side S16 of the eighth lens L8 to the optical axis O1. By making the optical lens 100 satisfy the above relationship, the direction of the light can be adjusted, which helps to improve the image quality such as relative luminance around the imaging surface IMG, the surface shape of the eighth lens L8 can be adjusted, which helps to correct off-axis aberrations such as image curvature, the incidence angle of light on the imaging surface IMG can be adjusted to improve the response efficiency of the image sensor, and further improve the image quality such as relative luminance.

[0072] In some embodiments, the optical lens 100 satisfies the following relationship: 1.7 < SD71 / Yc71 < 1.9; for example, SD71 / Yc71 is 1.71, 1.751, 1.8, 1.82, 1.851, 1.89, etc. Wherein, SD71 is half of the maximum effective aperture of the object side S13 of the seventh lens L7, and Yc71 is the vertical height from the off-axis vertex of the object side S14 of the seventh lens L7 to the optical axis O1. By making the optical lens 100 satisfy the above relationship, the surface shape trend of the image side S14 of the seventh lens L7 along the off-axis direction can be reasonably controlled, the seventh lens L7 has a reverse point, which is beneficial to correct the distortion and field curvature generated by the first lens L1 to the sixth lens L6, make the refractive power configuration near the imaging surface IMG more uniform, reduce the incidence angle of light on the image surface, and reduce the sensitivity of the optical lens 100.

[0073] In some embodiments, the optical lens 100 satisfies the following relationship: -5.1 < f8 / |SAGYS81| < -4; for example, f8 / |SAGYS81| is -5, -4.8, -4.7, -4.5, -4.3, -4.1, etc. Wherein, SAGYS81 is the horizontal displacement amount of the intersection point of the object side surface S15 of the eighth lens L8 on the optical axis O1 to the maximum effective radius position of the object side surface S15 of the eighth lens L8 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the effective focal length of the eighth lens L8 and the surface type of the object side surface S15 of the eighth lens L8 are reasonably set, which is beneficial to maximize the reduction of chromatic aberration and spherical aberration, improve the imaging quality of the optical lens 100; at the same time, it is also beneficial to reasonably distribute the refractive power of the eighth lens L8, strengthen the light collecting ability of the optical lens 100, reduce the total length of the optical lens 100, and realize the miniaturization of the optical lens 100.

[0074] In some embodiments, the optical lens 100 satisfies the following relationship: -5.1 < f8 / |SAGYS81| < -4; for example, f8 / |SAGYS81| is -5, -4.8, -4.7, -4.5, -4.3, -4.1, etc. Wherein, SAGYS81 is the horizontal displacement amount of the intersection point of the object side surface S15 of the eighth lens L8 on the optical axis O1 to the maximum effective radius position of the object side surface S15 of the eighth lens L8 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the effective focal length of the eighth lens L8 and the surface type of the object side surface S15 of the eighth lens L8 are reasonably set, which is beneficial to maximize the reduction of chromatic aberration and spherical aberration, improve the imaging quality of the optical lens 100; at the same time, it is also beneficial to reasonably distribute the refractive power of the eighth lens L8, strengthen the light collecting ability of the optical lens 100, reduce the total length of the optical lens 100, and realize the miniaturization of the optical lens 100.

[0075] In some embodiments, the optical lens 100 satisfies the following relationship: 3.9 < (|SAGYS81| + |SAGYS82|) / CT8 < 4.9; for example, (|SAGYS81| + |SAGYS82|) / CT8 is 4, 4.1, 4.3, 4.5, 4.7, 4.8, etc. The eighth lens L8 is provided with multiple inflection points, which is beneficial to correct the distortion and field curvature generated by the front lens group, and make the refractive power near the imaging surface IMG more uniform; satisfying the above relationship can reasonably control the refractive power and thickness of the lens in the vertical direction, avoid the lens being too thin or too thick, reduce the incidence angle of light on the image surface, and reduce the sensitivity of the optical lens 100.

[0076] In some embodiments, the optical lens 100 satisfies the following relationship: 1.8 < SD72 / SD52 < 2; for example, SD72 / SD52 is 1.81, 1.85, 1.89, 1.92, 1.95, 1.99, etc. Wherein, SD52 is half of the maximum effective aperture of the image side S10 of the fifth lens L5. By making the optical lens 100 satisfy the above relationship, that is, controlling the ratio of the maximum effective aperture difference between the image side S14 of the seventh lens L7 and the image side S10 of the fifth lens L5 within a reasonable range, on the one hand, it is beneficial to reduce the deflection angle of the edge field light at the edge of each lens, so that the light can be smoothly transmitted at the edge of each lens, ensuring excellent imaging quality of the edge field, on the other hand, it is also beneficial to the uniform distribution of the maximum effective aperture of each lens in the optical lens 100, reducing the aperture gradient difference of each lens, which is beneficial to the compactness of the optical lens 100, and also can improve the assembly stability between lenses.

[0077] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1 < SD61 / SD52 < 1.3; for example, SD61 / SD52 is 1.11, 1.15, 1.19, 1.21, 1.23, 1.25, 1.29, etc. Wherein, SD61 is half of the maximum effective aperture of the object side S11 of the sixth lens L6. By making the optical lens 100 satisfy the above relationship, the discontinuity in the structure of the fifth lens L5 and the sixth lens L6 can be effectively reduced, making the edge field light more smooth, which is beneficial to the stable processing and production of the product.

[0078] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < SD52 / SD11 < 1.2; for example, SD52 / SD11 is 1.1, 1.12, 1.14, 1.16, 1.17, 1.19, etc. Wherein, SD11 is half of the maximum effective aperture of the object side S1 of the first lens L1. By making the optical lens 100 satisfy the above relationship, the difficulty of forming the first lens L1 can be reduced, and at the same time, the volume of the optical lens 100 will not be too large, and the effective half aperture of the image side S10 of the fifth lens L5 can be reduced, which can correct the off-axis field aberration and improve the imaging quality of the imaging lens group 100.

[0079] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < ET8 / CT8 < 1.5; for example, ET8 / CT8 is 1.1, 1.15, 1.2, 1.25, 1.35, 1.42, 1.49, etc. Wherein, ET8 is the edge thickness of the maximum effective aperture of the eighth lens L8. By making the optical lens 100 satisfy the above relationship, the thickness of the eighth lens L8 to the optical axis O1 and the edge thickness of the eighth lens L8 can be controlled within a reasonable range, thereby facilitating the guarantee of the material uniformity of the eighth lens L8, and further improving the uniformity of the imaging quality of the optical lens 100. At the same time, the processability of the eighth lens L8 can also be guaranteed, and the difficulty of forming the eighth lens L8 is reduced.

[0080] In some embodiments, the optical lens 100 satisfies the following relationship: 1 < ET7 / ET6 < 1.4; for example, ET7 / ET6 is 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.39, etc. Wherein, ET7 is the edge thickness of the maximum effective aperture of the seventh lens L7, and ET6 is the edge thickness of the maximum effective aperture of the sixth lens L6. By making the optical lens 100 satisfy the above relationship, the edge thickness of the sixth lens L6 and the edge thickness of the seventh lens L7 can be reasonably controlled, which is conducive to the processing of the sixth lens L6 and the seventh lens L7, and also guarantees the reasonable spacing of the edges of the sixth lens L6 and the seventh lens L7. In turn, the chief ray incidence angle of the edge field of view will not be too large, which is conducive to reducing the assembly sensitivity of the optical lens 100.

[0081] In some embodiments, the optical lens 100 satisfies the following relationship: 1.6 < CT4 / ET4 < 1.8; for example, CT4 / ET4 is 1.61, 1.65, 1.69, 1.72, 1.73, 1.75, 1.79, etc. Wherein, ET4 is the edge thickness of the maximum effective aperture of the fourth lens L4. By making the optical lens 100 satisfy the above relationship, the ratio of the center thickness and the edge thickness of the fourth lens L4 can be reasonably controlled, thereby reasonably controlling the overall thickness of the fourth lens L4, and avoiding the situation that the ratio of the center thickness and the edge thickness is too large, which is not conducive to processing and assembly.

[0082] In some embodiments, the optical lens 100 satisfies the following relationship: 1.3 < ΣCT / ΣAT < 1.6; for example, ΣCT / ΣAT is 1.31, 1.35, 1.4, 1.45, 1.5, 1.55, 1.59, etc. Wherein, ΣCT is the sum of thicknesses of all lenses from the first lens L1 to the eighth lens L8 on the optical axis O1, and ΣAT is the sum of air gaps of the first lens L1 to the eighth lens L8 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, the step difference between the lenses of the optical lens 100 can be effectively shortened by reasonably configuring the air gap, and the clamping design of the lenses of the optical lens 100 is facilitated, thereby improving the assembly yield of the optical lens 100. If the upper limit of the relationship is exceeded, the lenses are too close to each other, which can easily cause collision between the lenses; if the lower limit of the relationship is exceeded, the lenses are spaced apart too far from each other, which is not conducive to the assembly of the lenses.

[0083] In some embodiments, the optical lens 100 satisfies the following relationship: 3.1 < CT4 / AT34 < 3.9; for example, CT4 / AT34 is 3.11, 3.2, 3.4, 3.6, 3.75, 3.89, etc. Wherein, AT34 is the distance between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4 on the optical axis O1. By making the optical lens 100 satisfy the above relationship, by constraining the ratio of the center thickness of the fourth lens L4 to the air gap of the third lens L3 and the fourth lens L4, the curvature degree of the object side S7 of the fourth lens L4 can be controlled, which is beneficial to smoothly transition the light from the third lens L3 to the fourth lens L4, reduce the deflection angle of the light, thereby reducing the aberration of the optical lens 100, and at the same time, the air gap of the third lens L3 and the fourth lens L4 can be reasonably controlled to reduce the sensitivity of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0084] In some embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 can all be glass, so that the optical lens 100 has good optical effects, and meanwhile, the influence of temperature on the lenses can be reduced. In some embodiments, among the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8, a part can be made of glass material, and the other part can be made of plastic material, so that the influence of temperature on the lenses can be reduced to achieve better imaging effects, and meanwhile, the processing cost of the lenses and the weight of the lenses can be reduced, so that the processing cost of the optical lens 100 and the overall weight of the optical lens 100 can be reduced. In some embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 can all be plastic, so as to reduce the weight and cost of the optical lens 100.

[0085] In some embodiments, in order to increase the freedom of face design, the surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 can all be designed as aspheric surfaces, so that the imaging quality can be ensured. In other embodiments, the surfaces of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8 in the optical lens 100 can also be designed as spherical surfaces.

[0086] In some embodiments, the optical lens 100 further comprises a stop STO, which can be an aperture stop and / or a field stop. For example, the stop STO can be an aperture stop, or the stop STO can be a field stop, or the stop STO can be an aperture stop and a field stop. In this embodiment, the stop STO is arranged on the object side S1 of the first lens L1. It can be understood that in other embodiments, the stop STO can also be arranged between other lenses, and the arrangement is adjusted according to the actual situation, which is not limited in this embodiment.

[0087] In some embodiments, the optical lens 100 further comprises an optical filter IR disposed between the eighth lens L8 and an imaging surface IMG of the optical lens 100. In the present embodiment, the optical filter IR can be an infrared cut-off filter, so that light of other wavebands such as infrared light is filtered out and only visible light is allowed to pass, so that the imaging is more in line with the visual experience of the human eye. Of course, the optical filter IR can also be an infrared band-pass filter, so that light of other wavebands such as visible light is filtered out and only infrared light is allowed to pass, so that the imaging quality is improved. It can be understood that the optical filter IR can be made of glass, can be made of optical glass coated with a film, or can be an optical filter made of other materials, which can be selected according to actual needs and is not specifically limited in the present embodiment.

[0088] First embodiment

[0089] Please continue to see Figure 1 The optical lens 100 in the present embodiment has a total of eight lenses with refractive power, including a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an eighth lens L8 disposed in order from the object side to the image side along an optical axis O1.

[0090] The first lens L1 has positive refractive power, and its object side surface S1 is convex at the near optical axis O1, and its image side surface S2 is concave at the near optical axis O1. The second lens L2 has negative refractive power, and its object side surface S3 is convex at the near optical axis O1, and its image side surface S4 is concave at the near optical axis O1. The third lens L3 has negative refractive power, and its object side surface S5 is convex at the near optical axis O1, and its image side surface S6 is concave at the near optical axis O1. The fourth lens L4 has positive refractive power, and its object side surface S7 is concave at the near optical axis O1, and its image side surface S8 is convex at the near optical axis O1. The fifth lens L5 has negative refractive power, and its object side surface S9 is concave at the near optical axis O1, and its image side surface S10 is convex at the near optical axis O1. The sixth lens L6 has positive refractive power, and its object side surface S11 is convex at the near optical axis O1, and its image side surface S12 is convex at the near optical axis O1. The seventh lens L7 has positive refractive power, and its object side surface S13 is convex at the near optical axis O1, and its image side surface S14 is concave at the near optical axis O1. The eighth lens L8 has negative refractive power, and its object side surface S15 is concave at the near optical axis O1, and its image side surface S16 is concave at the near optical axis O1.

[0091] In addition, the optical lens 10 further comprises a stop STO, a filter IR and an imaging surface IMG. In this embodiment, the stop STO is arranged on the object side S1 of the first lens L1 of the optical lens 10, and is used to control the amount of light. The filter IR is arranged between the eighth lens L8 and the imaging surface IMG, and is an infrared cut filter. The infrared cut filter is used to filter out infrared light, so that the light entering the imaging surface IMG is only visible light. The material of the infrared cut filter can be glass or plastic, and a film can be coated on the surface thereof. The materials of the first lens L1 to the eighth lens L8 can be glass or plastic. The effective pixel area of the image sensor is located on the imaging surface.

[0092] Table 1 shows the parameters of the optical lens 100 of this embodiment, wherein the Y radius is the curvature radius of the object side or the image side of the corresponding surface number at the optical axis O1. The surface number S1 and the surface number S2 are the object side S1 and the image side S2 of the first lens L1, respectively. That is, in the same lens, the surface with the smaller surface number is the object side, and the surface with the larger surface number is the image side. The first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis O1, and the second value is the distance from the image side of the lens to the next surface in the image side direction on the optical axis O1. The focal length, the material refractive index and the Abbe number are obtained by using visible light with a reference wavelength of 555 nm. The units of the Y radius, the thickness and the focal length are millimeters (mm).

[0093] Table 1

[0094]

[0095]

[0096] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view angle of the optical lens 100, and TTL is the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis, that is, the total optical length.

[0097] In this embodiment, the object side and the image side of any one of the first lens L1 to the eighth lens L8 are aspherical surfaces. The surface type x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

[0098]

[0099] Where x is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface shape formula. Table 2 lists the high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, and A30 of the aspheric mirror surfaces S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, and S16 that can be used in the first embodiment.

[0100] Table 2

[0101]

[0102]

[0103] See also Figure 2 (A) in Figure 2 (A) in the figure shows the longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.0000nm, 610.0000nm, 555.0000nm, 510.0000nm, 483.0000nm and 435.0000nm respectively. 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. 1 , 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.

[0104] See also 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 555.0000 nm. The horizontal axis along the X-axis represents the focus offset, and the vertical axis along the Y-axis represents the image height, both in mm. In the astigmatism diagram, T represents the curvature of the imaging surface IMG in the meridional 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, the astigmatism of the optical lens 100 is well compensated.

[0105] See also Figure 2 (C) in Figure 2 (C) in FIG. 1 shows the distortion curves of the optical lens 100 in the first embodiment at a wavelength of 555.0000 nm. The horizontal axis along the X-axis represents the distortion, and the vertical axis along the Y-axis represents the image height, both in mm. Figure 2As can be seen from (C) in FIG. 1 , the distortion of the optical lens 100 is well corrected.

[0106] Second embodiment

[0107] See Figure 3 The structure of the optical lens 100 in this embodiment differs from that in the first embodiment in that the third lens element L3 has positive refractive power, its object-side surface S5 is concave at the near optical axis O1, and its image-side surface S6 is convex at the near optical axis O1; the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O1; other details may be referred to herein.

[0108] Table 3 shows the parameters of the optical lens 100 of this embodiment. The focal length, material refractive index, and Abbe number are all obtained using visible light with a reference wavelength of 555 nm. The units of the Y radius, thickness, and focal length are all millimeters (mm). The meanings of the other parameters are the same as those of the first embodiment.

[0109] Table 3

[0110]

[0111]

[0112] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view of the optical lens 100, and 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 O1, that is, the total optical length.

[0113] Table 4 lists the high-order coefficients of the various aspheric mirror surfaces that can be used in the second embodiment, wherein the surface shapes of the various aspheric mirror surfaces can be defined by the formula given in the first embodiment.

[0114] Table 4

[0115]

[0116]

[0117] See also Figure 4 ,Depend on Figure 4 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 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 The wavelengths corresponding to the curves (A), (B) and (C) can be referred to in the first embodiment. Figure 2 The contents described in (A), (B) and (C) will not be repeated here.

[0118] Third Embodiment

[0119] Please refer to Figure 5 The structure of the optical lens 100 in this embodiment is different from that of the first embodiment in that the object side S5 of the third lens L3 is concave at the near optical axis O1; the image side S10 of the fifth lens L5 is concave at the near optical axis O1; the image side S12 of the sixth lens L6 is concave at the near optical axis O1; and the rest can be referred to.

[0120] Table 5 shows the parameters of the optical lens 100 in this embodiment, wherein the focal length, the material refractive index and the Abbe number are obtained by using visible light with a reference wavelength of 555 nm, the unit of Y radius, thickness and focal length is millimeter (mm), and the meanings of other parameters are the same as those of the first embodiment.

[0121] Table 5

[0122]

[0123]

[0124] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view angle of the optical lens 100, and TTL is the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O1, that is, the total optical length.

[0125] Table 6 shows the high-order term coefficients of the aspherical surfaces that can be used in the third embodiment, wherein each aspherical surface can be defined by the formula given in the first embodiment.

[0126] Table 6

[0127]

[0128]

[0129] Please refer to Figure 6 From the (A) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion curve diagram in Figure 6 , it can be seen that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), (B) and (C) in Figure 6 can refer to the description of the wavelengths corresponding to the curves in (A), (B) and (C) in the first embodiment, which will not be repeated here. Figure 2

[0130] Fourth Embodiment

[0131] Please refer to​Figure 7 The structure of the optical lens 100 in this embodiment differs from that in the first embodiment in that the object-side surface S5 of the third lens element L3 is concave at the near optical axis O1; the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O1; the image-side surface S12 of the sixth lens element L6 is concave at the near optical axis O1; and the object-side surface S15 of the eighth lens element L8 is convex at the near optical axis O1. Other details may be referred to herein.

[0132] Table 7 shows the parameters of the optical lens 100 of this embodiment. The focal length, material refractive index, and Abbe number are all obtained using visible light with a reference wavelength of 555 nm. The units of the Y radius, thickness, and focal length are all millimeters (mm). The meanings of the other parameters are the same as those of the first embodiment.

[0133] Table 7

[0134]

[0135] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view of the optical lens 100, and 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 O1, that is, the total optical length.

[0136] Table 8 gives the high-order coefficients of each aspheric mirror surface that can be used in the fourth embodiment, wherein each aspheric surface shape can be defined by the formula given in the first embodiment.

[0137] Table 8

[0138]

[0139]

[0140] 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 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 The wavelengths corresponding to the curves (A), (B) and (C) can be referred to in the first embodiment. Figure 2 The contents described in (A), (B) and (C) will not be repeated here.

[0141] Fifth embodiment

[0142] See also Figure 9The structure of the optical lens 100 in this embodiment differs from that in the first embodiment in that the third lens L3 has positive refractive power, and its image-side surface S6 is convex near the optical axis O1; other references may be made.

[0143] Table 9 shows the parameters of the optical lens 100 of this embodiment. The focal length, material refractive index, and Abbe number are all obtained using visible light with a reference wavelength of 555 nm. The units of the Y radius, thickness, and focal length are all millimeters (mm). The meanings of the other parameters are the same as those of the first embodiment.

[0144] Table 9

[0145]

[0146] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view of the optical lens 100, and 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 O1, that is, the total optical length.

[0147] Table 10 gives the high-order coefficients of the various aspheric mirror surfaces that can be used in the fifth embodiment, wherein the surface shapes of the various aspheric mirror surfaces can be defined by the formula given in the first embodiment.

[0148] Table 10

[0149]

[0150]

[0151] 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 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 10 The wavelengths corresponding to the curves (A), (B) and (C) can be referred to in the first embodiment. Figure 2 The contents described in (A), (B) and (C) will not be repeated here.

[0152] Sixth embodiment

[0153] See also Figure 11 The structure of the optical lens 100 in this embodiment differs from that in the first embodiment in that the third lens element L3 has positive refractive power, and its image-side surface S6 is convex at the near optical axis O1; the image-side surface S10 of the fifth lens element L5 is concave at the near optical axis O1; and the object-side surface S11 of the sixth lens element L6 is concave at the near optical axis O1. Other details may be referred to herein.

[0154] Table 11 shows the parameters of the optical lens 100 of this embodiment. The focal length, material refractive index, and Abbe number are all obtained using visible light with a reference wavelength of 555 nm. The units of the Y radius, thickness, and focal length are all millimeters (mm). The meanings of the other parameters are the same as those of the first embodiment.

[0155] Table 11

[0156]

[0157] Wherein, EFL is the effective focal length of the optical lens 100, FNO is the aperture number of the optical lens 100, FOV is the maximum field of view of the optical lens 100, and 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 O1, that is, the total optical length.

[0158] Table 12 lists the high-order coefficients of the aspheric mirror surfaces that can be used in the sixth embodiment, wherein the surface shapes of the aspheric mirror surfaces can be defined by the formula given in the first embodiment.

[0159] Table 12

[0160]

[0161]

[0162] 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 are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 12 The wavelengths corresponding to the curves (A), (B) and (C) can be referred to in the first embodiment. Figure 2 The contents described in (A), (B) and (C) will not be repeated here.

[0163] Please refer to Table 13, which is a summary of the ratios of various relationship equations in the first to sixth embodiments of the present application.

[0164] Table 13

[0165]

[0166]

[0167]

[0168] See Figure 13The embodiment of the present application further provides a camera module 200. The camera module 100 comprises the optical lens 100 and the image sensor 201 of any of the above embodiments. The image sensor 201 is arranged on the image side of the optical lens 100. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0169] Please refer to Figure 14 The embodiment of the present application further provides an electronic device 300. The electronic device 300 comprises a housing 301 and the camera module 200, and the camera module 200 is mounted on the housing 301. The electronic device 300 of the embodiment of the present application includes but is not limited to a driving recorder, a smart phone, a tablet computer, a notebook computer, an electronic book reader, a portable multimedia player (PMP), a portable telephone, a video telephone, a mobile medical device, a wearable device, and the like supporting imaging.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than 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 can be modified or replaced equivalently 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 a total of eight lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in sequence from the object side to the image side along the optical axis; The first lens has positive refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; the second lens has negative refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; the fourth lens has positive refractive power, its object side surface is concave near the optical axis, and its image side surface is convex near the optical axis; the fifth lens has negative refractive power, its object side surface is concave near the optical axis; the sixth lens has positive refractive power; the seventh lens has positive refractive power, its object side surface is convex near the optical axis, and its image side surface is concave near the optical axis; the eighth lens has negative refractive power, and its image side surface is concave near the optical axis; The optical lens satisfies the following relationships: 80° ≤ FOV ≤ 89.2°; 1.2 < TTL / ImgH < 1.41; Where, FOV is the full field of view angle of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and ImgH is half of the length of the diagonal of the effective pixel area on the imaging surface of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 0.9 < f1 / f < 1.1, and / or, -3.6 < f2 / f < -3, and / or, 7 < |f3| / f, and / or, 1.7 < f4 / f < 2.7, and / or, -3.1 < f5 / f < -1.9, and / or, 4 < f6 / f < 16, and / or, 1.3 < f7 / f < 1.5, and / or, -1.4 < f / f8 < -1.2, and / or, 1.2 < f12 / f < ​ ​ ​ 3. The optical lens according to claim 1, wherein: ​ ​ ​ ​ ​ ​ ​ ​ ​ -2.5 < R51 / f < -1.1, and / or, 12 < |R52| / f, and / or, 2.4 < |R61| / f, and / or, 5 < |R62| / f, and / or, 1.4 < f / R71 < 1.7, and / or, 2.7 < R72 / f < 8, and / or, 4.5 < R72 / R71 < 10.6, and / or, 7 < |R81| / f, and / or, 2.1 < f / R82 < 2.6; where f is the effective focal length of the optical lens, R11 is the curvature radius of the object side surface of the first lens on the optical axis, R12 is the curvature radius of the image side surface of the first lens on the optical axis, R21 is the curvature radius of the object side surface of the second lens on the optical axis, R22 is the curvature radius of the image side surface of the second lens on the optical axis, R31 is the curvature radius of the object side surface of the third lens on the optical axis, R32 is the curvature radius of the image side surface of the third lens on the optical axis, R41 is the curvature radius of the object side surface of the fourth lens on the optical axis, R42 is the curvature radius of the image side surface of the fourth lens on the optical axis, R51 is the curvature radius of the object side surface of the fifth lens on the optical axis, R52 is the curvature radius of the image side surface of the fifth lens on the optical axis, R61 is the curvature radius of the object side surface of the sixth lens on the optical axis, R62 is the curvature radius of the image side surface of the sixth lens on the optical axis, R71 is the curvature radius of the object side surface of the seventh lens on the optical axis, R72 is the curvature radius of the image side surface of the seventh lens on the optical axis, R81 is the curvature radius of the object side surface of the eighth lens on the optical axis, and R82 is the curvature radius of the image side surface of the eighth lens on the optical axis.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 1.6 ≤ FNO < 1.8, and / or, 1.2 < TTL / f < 1.3, and / or, 1 < f / ImgH < 1.2, and / or, 44° < FOV / FNO < 56°; where FNO is the f-number of the optical lens and f is the effective focal length of the optical lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 2.9 < CT4 / CT3 < 3.1, and / or, 1 < CT6 / CT5 < 1.7, and / or, 1.2 < CT2 / CT3 < 1.8, and / or, 1.4 < CT1 / CT4 < 1.6, and / or, 2.7 ≤ CT​1 / CT2 < 3.9, and / or, 1.3 < CT4 / CT5 < 2.3, and / or, 1 < CT7 / CT6 < 1.4, and / or, 1 < CT7 / CT8 < 1.3, and / or, 14 < AT78max / AT78min < 36, and / or, 2.6 < DL / (CT1 + CT2 + CT3 + CT4 + CT5) < 2.9; Where, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, CT8 is the thickness of the eighth lens on the optical axis, AT78max is the maximum interval between the seventh lens and the eighth lens in the optical axis direction, AT78min is the minimum interval between the seventh lens and the eighth lens in the optical axis direction, and DL is the distance between the object side surface of the first lens and the image side surface of the eighth lens on the optical axis.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 2.5 < TTL / DL68 < 2.8, and / or, 1.1 < TTL / DL < 1.2, and / or, 2.3 < TTL / DL15 < 2.6; Where, DL68 is the distance between the object side surface of the sixth lens and the image side surface of the eighth lens on the optical axis, DL is the distance between the object side surface of the first lens and the image side surface of the eighth lens on the optical axis, and DL15 is the distance between the object side surface of the first lens and the image side surface of the fifth lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 1.5 < SD72 / Yc72 < 1.7, and / or, 2.7 < SD82 / Yc82 < 3, and / or, 1.7 < SD71 / Yc71 < 1.9, and / or, -5.1 < f8 / |SAGYS81| < -4, and / or, -6.3 < f8 / |SAGYS82| < -4.2, and / or, 3.9 < (|SAGYS81| + |SAGYS82|) / CT8 < 4.9, and / or, 1.8 < SD72 / SD52 < 2, and / or, 1.1 < SD61 / SD52 < 1.3, and / or, 1 < SD52 / SD11 < 1.2; Where, SD72 is half of the maximum effective aperture of the image side of the seventh lens, Yc72 is the vertical height from the off-axis vertex of the image side of the seventh lens to the optical axis, SD82 is half of the maximum effective aperture of the image side of the eighth lens, Yc82 is the vertical height from the off-axis vertex of the image side of the eighth lens to the optical axis, SD71 is half of the maximum effective aperture of the object side of the seventh lens, Yc71 is the vertical height from the off-axis vertex of the object side of the seventh lens to the optical axis, f8 is the effective focal length of the eighth lens, SAGYS81 is the horizontal displacement on the optical axis from the intersection point of the object side of the eighth lens on the optical axis to the position of the maximum effective radius of the object side of the eighth lens, SAGYS82 is the horizontal displacement on the optical axis from the intersection point of the image side of the eighth lens on the optical axis to the position of the maximum effective radius of the image side of the eighth lens, CT8 is the thickness of the eighth lens on the optical axis, SD52 is half of the maximum effective aperture of the image side of the fifth lens, SD61 is half of the maximum effective aperture of the object side of the sixth lens, and SD11 is half of the maximum effective aperture of the object side of the first lens.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 1 < ET8 / CT8 < 1.5, and / or, 1 < ET7 / ET6 < 1.4, and / or, 1.6 < CT4 / ET4 < 1.8, and / or, 1.3 < ΣCT / ΣAT < 1.6, and / or, 3.1 < CT4 / AT34 < 3.9; Where, ET8 is the edge thickness of the maximum effective aperture of the eighth lens, CT8 is the thickness of the eighth lens on the optical axis, ET7 is the edge thickness of the maximum effective aperture of the seventh lens, ET6 is the edge thickness of the maximum effective aperture of the sixth lens, CT4 is the thickness of the fourth lens on the optical axis, ET4 is the edge thickness of the maximum effective aperture of the fourth lens, ΣCT is the sum of the thicknesses of all lenses on the optical axis from the first lens to the eighth lens, ΣAT is the sum of the air gaps on the optical axis from the first lens to the eighth lens, and AT34 is the spacing on the optical axis from the image side of the third lens to the object side of the fourth lens 9. A camera module, characterized in that: Comprising: The optical lens according to any one of claims 1 to 8; And An image sensor, provided on the image side of the optical lens.

10. An electronic device, characterized in that: Comprising: A housing; And The imaging module according to claim 9, the imaging module being mounted on the housing.

Images