Optical lens, camera module and terminal equipment

Abstract

An optical lens, a camera module and a terminal device are provided, the optical lens comprises seven lenses with refractive power, and the seven lenses sequentially comprise a first lens with negative refractive power, a second lens with negative refractive power, a third lens with negative refractive power, a fourth lens with negative refractive power, a fifth lens with negative refractive power and a sixth lens with negative refractive power from an object side to an image side; a second lens element with negative refractive power having a convex object-side surface and a concave image-side surface; a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with positive refractive power having a convex object-side surface and a convex image-side surface; the fifth lens has positive refractive power, and the object side surface and the image side surface of the fifth lens are convex surfaces; the sixth lens has negative refractive power, and the object side surface and the image side surface of the sixth lens are concave surfaces; the seventh lens has positive refraction power, and the object side surface and the image side surface of the seventh lens are convex surfaces; the optical lens satisfies the following relational expressions: 200 degrees < = FOV < = 210 degrees, and 11.5 < = TTL / F < = 12.5. According to the optical lens provided by the invention, the miniaturization design of the optical lens can be realized, meanwhile, the optical lens has the characteristic of a large field angle, and the imaging quality of the optical lens is improved.

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] With the rapid development of the automobile industry and the increasing demand for driving safety and convenience, the importance of in-vehicle assisted driving technology has become increasingly prominent. As a key component of in-vehicle assisted driving technology, the surround-view vehicle lens system has gradually become a hot area for research and development. The surround-view vehicle lens system has high performance requirements for vehicle lenses. However, the vehicle lenses in the existing technology have the following problems: large size and high installation difficulty; insufficient field of view and low imaging quality, resulting in limited monitoring range and many blind spots, which makes it difficult to meet the requirements of intelligent vehicle and monitoring systems for optical lenses with large field of view and high imaging quality. 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 realize the miniaturization design of the optical lens, and at the same time make the optical lens have the characteristics of a large field of view, thereby improving the imaging quality of the optical lens.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the present application discloses an optical lens, which has 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, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; a second lens having negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; a third lens having negative refractive power, the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis; a fourth lens having positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis; The fifth lens has positive refractive power, and the object side surface and the image side surface are both convex at the near optical axis; the sixth lens has negative refractive power, and the object side surface and the image side surface are both concave at the near optical axis; the seventh lens has positive refractive power, and the object side surface and the image side surface are both convex at the near optical axis; the optical lens satisfies the following relationship: 200°≤FOV≤210°, 11.5≤TTL / F≤12.5; 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 surface 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 in the embodiment of the present application, the first lens has negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis, and the convex surface is a meniscus shape facing the object, which can effectively collect incident light with a large field of view angle, expand the field of view angle of the optical lens, and achieve a maximum field of view angle greater than or equal to 200°; the second lens has negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis, which can preliminarily correct the astigmatism of the optical lens, and at the same time further control the trend of light, reduce the difficulty of aberration correction of subsequent lenses, and improve the imaging quality of the optical lens; the third lens has negative refractive power, the object side surface is concave at the near optical axis, and the image side surface can be convex at the near optical axis, which can make the light more reasonably diverge to the rear lens and reduce the field curvature between different fields of view; the fourth lens has positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis, which can converge light The fifth lens has positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis, which can further converge the light and adjust the optical path difference between different fields of view, so that the outgoing light of the fifth lens can smoothly transition to the rear, thereby reducing sensitivity and being beneficial to reducing aberrations; the sixth lens has negative refractive power, the object side surface is concave at the near optical axis, and the image side surface is concave at the near optical axis; the seventh lens has positive refractive power, the object side surface is convex at the near optical axis, and the image side surface is convex at the near optical axis; the sixth lens and the seventh lens can adjust the light of the central field of view and the edge field of view passing through the fifth lens, increase the proportion of the edge field of view in the imaging picture, and enhance the imaging clarity of the edge field of view; at the same time, it is beneficial to correct chromatic aberration and balance various aberrations, improve resolution, and can effectively reduce tolerance sensitivity and improve the imaging quality of the optical lens.

[0006] When 200°≤FOV≤210°, the optical lens has a larger field of view, which is beneficial for the optical lens to obtain more scene content, thereby enriching the imaging information of the optical lens. When 11.5≤TTL / F≤12.5, the ratio of the total length of the optical lens to the focal length of the optical lens can be controlled within a reasonable range, which not only enables the miniaturization of the optical lens, but also helps to better converge light on the imaging surface, thereby improving the imaging quality of the optical lens.

[0007] In a second aspect, the present application discloses a camera module, the camera module comprising a photosensitive chip and the optical lens as described in the first aspect, the photosensitive chip being arranged on the image side of the optical lens. The camera module having the optical lens can realize a miniaturized design of the optical lens, and at the same time enables the optical lens to have the characteristic of a large field of view, thereby improving the imaging quality of the optical lens.

[0008] In a third aspect, the present application discloses a terminal device, comprising a housing and a camera module as described in the second aspect, wherein the camera module is arranged in the housing. The electronic device having the camera module realizes a miniaturized design of an optical lens, and at the same time enables the optical lens to have the characteristic of a large field of view, thereby improving the imaging quality of the optical lens. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0010] Figure 2 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the first embodiment of the present application.

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

[0012] Figure 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 second embodiment of the present application.

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

[0014] Figure 6 It 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 diagram of the structure of the optical lens disclosed in the fourth embodiment of the present application.

[0016] Figure 8 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] Fig. 9 It is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of the present application.

[0018] Fig.10 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the fifth embodiment of the present application.

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

[0020] Fig.12 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the sixth embodiment of the present application.

[0021] Fig.13It is a structural schematic diagram of the camera module disclosed in this application.

[0022] Fig.14 It is a schematic diagram of the structure of the terminal device disclosed in this application.

[0023] Description of main component symbols: optical lens 100, optical axis O, first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, seventh lens L7, object side surfaces S1, S3, S5, S7, S9, S11, S13, image side surfaces S2, S4, S6, S8, S10, S12, S14, aperture STO, filter IR, protective glass CG, imaging surface IMG, camera module 200, photosensitive chip 201, terminal device 300, housing 301. DETAILED DESCRIPTION

[0024] The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0025] First, see Figure 1 The embodiment of the present application discloses an optical lens 100, which has seven lenses with refractive power, which 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 from the object side to the image side along the optical axis O. When imaging, light enters 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 from the object side of the first lens L1, and finally forms an image on the imaging surface IMG of the optical lens 100.

[0026] Further, 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.

[0027] Further, 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 concave at the near optical axis O, and the image-side surface S6 of the third lens L3 is convex 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.

[0028] In the optical lens 100 provided in the embodiment of the present application, the first lens L1 has a negative refractive power, the object side surface S1 is a convex surface at the near optical axis O, and the image side surface S2 is a concave surface at the near optical axis O. The convex surface is a meniscus shape facing the object, which can effectively collect incident light with a large field of view angle, expand the field of view angle of the optical lens 100, and achieve a maximum field of view angle FOV ≥ 200°; the second lens L2 has a negative refractive power, and the object side surface S3 is a convex surface at the near optical axis O, which can preliminarily correct the astigmatism of the optical lens 100, and at the same time The trend of light can be controlled in one step, the difficulty of aberration correction of subsequent lenses can be reduced, and the imaging quality of the optical lens 100 can be improved; the third lens L3 has negative refractive power, and the object side surface S5 is concave at the near optical axis O, and the image side surface S6 is convex at the near optical axis O, which can make the light diverge to the rear lens more reasonably and reduce the field curvature between different fields of view; the fourth lens L4 has positive refractive power, the object side surface S7 is convex at the near optical axis O, and the image side surface S8 is convex at the near optical axis O, which can converge the light and reduce the light height The fifth lens L5 has a positive refractive power, the object side S9 is convex at the near optical axis O, and the image side S10 is convex at the near optical axis O, which can further converge the light and adjust the optical path difference between different fields of view, so that the outgoing light of the fifth lens L5 smoothly transitions to the rear, thereby reducing sensitivity and helping to reduce aberrations; the sixth lens L6 has a negative refractive power, the object side S11 is concave at the near optical axis O, and the image side S12 is concave at the near optical axis O The seventh lens L7 has positive refractive power, the object side surface S13 is convex at the near optical axis O, and the image side surface S14 is convex at the near optical axis O. The sixth lens L6 and the seventh lens L7 can adjust the light of the central field of view and the edge field of view passing through the fifth lens L5, increase the proportion of the edge field of view in the imaging picture, and enhance the imaging clarity of the edge field of view; at the same time, it is beneficial to correct chromatic aberration and balance various aberrations, improve resolution, and can effectively reduce tolerance sensitivity, thereby improving the imaging quality of the optical lens 100.

[0029] In some embodiments, when the optical lens 100 is applied to electronic devices such as vehicle-mounted devices, driving recorders, or on automobiles, 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, and the seventh lens L7 can all be glass, so that the optical lens 100 has a good optical effect and can also reduce the influence of temperature on the above lenses. Of course, among the multiple lenses of the optical lens 100, some lenses can be made of glass, and some lenses can be made of plastic, so that while ensuring that the influence of temperature on the lens is reduced to achieve a better imaging effect, the processing cost of the lens and the weight of the lens can be reduced, thereby reducing the processing cost of the optical lens 100 and reducing the overall weight of the optical lens 100. In addition, it can be understood that when the optical lens 100 is applied to electronic devices such as smart phones and smart tablets, 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, and the seventh lens L7 can be selected from plastic to reduce the overall weight of the optical lens 100.

[0030] In some embodiments, considering that the spherical lens has the characteristics of simple manufacturing process and low production cost, and can be convenient for flexible design of the lens surface shape, the imaging resolution capability of the optical lens 100 is improved. The aspherical lens can make the object side or image side of the lens have a more flexible design, so that the lens can well solve the undesirable phenomena such as unclear imaging, distorted vision or narrow field of view when the lens is small and thin, and the optical lens 100 can have good imaging quality without too many lenses, which is conducive to shortening the length of the optical lens 100. Based on this, the first lens L1 and the fifth lens L5 can be spherical lenses, and the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7 are aspherical lenses. In this way, through the combined design of spherical and aspherical surfaces, not only can the processability of each lens be improved, which is beneficial to the surface design, but also the object side or image side of the lens can have a more flexible design, so that each lens can solve the undesirable phenomena such as unclear imaging, distorted field of view or narrow field of view in a small size and thinner condition, and the optical lens 100 can have good imaging quality without too many lenses, which is beneficial to shorten the length of the optical lens 100. It can be understood that in other embodiments, the surfaces of each lens in the optical lens 100 can be spherical, aspherical or any combination of spherical and aspherical surfaces, which can be selected according to actual needs, so it is not specifically limited in this embodiment.

[0031] In some embodiments, the optical lens 100 further includes a stop STO, which may be an aperture stop and / or a field stop, for example, the stop STO may be an aperture stop, or the stop STO may be a field stop, or the stop STO may be an aperture stop and a field stop. By arranging the stop STO between the image side surface S8 of the fourth lens L4 and the object side surface S9 of the fifth lens L5, the exit pupil can be moved away from the imaging surface IMG, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization.

[0032] In some embodiments, the optical lens 100 further includes a filter IR, which is disposed between the seventh lens L7 and the imaging surface IMG of the optical lens 100. In this embodiment, the filter IR may be an infrared cutoff filter, so that light of other bands such as infrared light can be filtered out, and only visible light can be allowed to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter IR may also be an infrared bandpass filter, so that light of other bands such as visible light can be filtered out, and only infrared light can be allowed to pass through, and the imaging quality can be improved by filtering light of other bands such as visible light; and the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also be imaged in dim environments and other special application scenarios and can obtain better imaging effects. The filter IR may also be a double-pass filter, which can simultaneously transmit visible light and part of infrared light, thereby realizing different band selections, and can realize both visible light imaging and infrared imaging, thereby realizing day and night versatility. It is understandable that the filter IR can be made of glass, or can be made of optical glass coating, or a filter IR of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[0033] 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, so as to protect and prevent dust from the photosensitive chip. The protective glass CG may be made of plastic, or may be made of optical glass coating, or protective glass CG of other materials, which may be selected according to actual needs and is not specifically limited in this embodiment. It is understandable that the protective glass CG may be a part of the optical lens 100, or may be removed from the optical lens 100, but when the protective glass CG is removed, the total optical length of the optical lens 100 remains unchanged.

[0034] In some embodiments, the optical lens 100 satisfies the relationship: 200°≤FOV≤210°. Wherein, FOV is the maximum field of view of the optical lens 100. Specifically, FOV can be 200.1°, 201°, 203°, 205°, 207° or 209°, etc. When the optical lens 100 satisfies the above relationship, the optical lens 100 has a larger field of view, which is conducive to the optical lens 100 being able to obtain more scene content, thereby enriching the imaging information of the optical lens 100.

[0035] In some embodiments, the optical lens 100 satisfies the relationship: 11.5≤TTL / F≤12.5. Wherein, 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. Specifically, TTL / F can be 11.5, 11.7, 11.9, 12.1, 12.3 or 12.5, etc. When the optical lens 100 satisfies the above relationship, the ratio of the total length of the optical lens 100 and the focal length of the optical lens 100 can be controlled within a reasonable range, thereby not only realizing the miniaturization of the optical lens 100, but also facilitating better convergence of light on the imaging surface IMG, thereby facilitating improving the imaging quality of the optical lens 100.

[0036] In some embodiments, the optical lens 100 satisfies the relationship: 0.5≤F / IMGH≤0.55. Wherein, F is the effective focal length of the optical lens 100, and IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, F / IMGH can be 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, etc. When the optical lens 100 satisfies the above relationship, the distortion generated by the optical lens 100 can be effectively corrected, thereby reducing the manufacturing difficulty of the optical lens 100 while improving the imaging quality of the optical lens 100; in addition, it can help control the focal length of the optical lens 100 within a reasonable range, and ensure that the optical lens 100 has a sufficient light-collecting area and a sufficient field of view angle, thereby simultaneously satisfying the characteristics of a large field of view angle and a large image surface.

[0037] In some embodiments, the optical lens 100 satisfies the relationship: 120°≤FOV / FNO≤130°. Wherein, FOV is the maximum field of view angle of the optical lens 100, and FNO is the aperture number of the optical lens. Specifically, FOV / FNO can be 120°, 121°, 123°, 125°, 127°, 129°, 130°, etc. When the optical lens 100 satisfies 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 of the optical lens 100 is too large, resulting in excessive distortion of the edge field of view, and distortion will appear in the periphery of the image. In addition, it will also cause the aperture number to be too small, resulting in excessive light transmittance of the optical lens 100, causing non-effective light to reach the imaging surface IMG, resulting in aberrations such as spherical aberration and field curvature in the imaging (especially at the edge of the field of view), which will lead to a decrease in the imaging performance of the optical lens 100; if it is lower than the lower limit of the above relationship, the aperture number of the optical lens 100 is relatively large, resulting in insufficient light transmittance of the optical lens 100, and the clarity of the captured image is reduced.

[0038] In some embodiments, the optical lens 100 satisfies the relationship: 1.8≤∑CT / ∑AT≤2.4. Wherein, ∑CT is the sum of the thicknesses of all lenses from the first lens L1 to the seventh lens L7 on the optical axis O, and ∑AT is the sum of the air gaps between two adjacent lenses from the first lens L1 to the seventh lens L7. Specifically, ∑CT / ∑AT can be 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, etc. By satisfying 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 support 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 together, which may easily lead to collisions between the lenses; if the lower limit is lower than the lower limit of the relationship, the intervals between the lenses are large, which is not conducive to the assembly of the lenses.

[0039] In some embodiments, the optical lens 100 satisfies the relationship: 1.8≤BFL / F≤2.4. Wherein, BFL is the distance from the image side surface S14 of the seventh lens L7 to the imaging surface IMG of the optical lens 10 on the optical axis O, and F is the effective focal length of the optical lens 100. Specifically, BFL / F can be 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, etc. By controlling the ratio of the back focus of the optical lens 100 to the focal length of the optical lens 100, it is beneficial to reasonably control the back focus and ensure the matching of the lens group and the image sensor. When the optical lens 100 exceeds the upper limit of the above relationship, the back focus of the optical lens 100 is too long, which is not conducive to achieving a large image surface effect; when the optical lens 100 is lower than the lower limit of the above relationship, the focal length of the optical lens 100 is too large, which is not conducive to achieving the large field of view required by the optical lens 100.

[0040] In some embodiments, the optical lens 100 satisfies the relationship: 7.5≤R1 / F≤9.5. Wherein, R1 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis O, and F is the effective focal length of the optical lens 100. Specifically, R1 / F can be 7.5, 7.7, 8.0, 8.5, 9.0, 9.5, etc. By controlling the ratio of the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis O to the focal length of the optical lens 100, the refractive power of the first lens L1 can be controlled within a reasonable range, which is beneficial to balance the refractive power of the first lens L1 in the optical lens 100, and further beneficial to balance the high-order coma of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0041] In some embodiments, the optical lens 100 satisfies the relationship: 3.8≤F4 / F≤4.2. Wherein, F4 is the effective focal length of the fourth lens L4, and F is the effective focal length of the optical lens 100. Specifically, F4 / F can be 3.8, 3.85, 3.9, 4.0, 4.1, 4.2, etc. When the optical lens 100 satisfies the above relationship, the fourth lens L4 provides a portion of the positive refractive power for the optical lens 100, which can be used to adjust the overall refractive power of the optical lens 100. The fourth lens L4 forms a Gaussian-like structure with the first lens L1, the second lens L2 and the third lens L3, which can balance the distortion generated by the first lens L1, the second lens L2 and the third lens L3, avoid high-order aberrations caused by excessive refractive index, and thus improve the imaging quality of the optical lens 100.

[0042] In some embodiments, the optical lens 100 satisfies the relationship: -12≤F3 / F≤-5. Wherein, F3 is the effective focal length of the third lens L3, and F is the effective focal length of the optical lens 100. Specifically, F3 / F can be -12, -10, -8, -7, -6, -5, etc. By limiting the relationship between the focal length of the third lens L3 and the effective focal length of the optical lens 100, the edge field aberration of the optical lens 100 can be corrected, the imaging resolution of the optical lens 100 can be improved, and the imaging quality of the optical lens 100 can be improved.

[0043] In some embodiments, the optical lens 100 satisfies the relationship: 1.4≤SAGS1 / CT1≤2.2. Wherein, SAGS1 is the distance from the maximum effective aperture of the object side surface S1 of the first lens L1 to the intersection of the object side surface S1 of the first lens L1 and the optical axis O in the direction of the optical axis O, and CT1 is the thickness of the first lens L1 on the optical axis O. Specifically, SAGS1 / CT1 can be 1.4, 1.6, 1.8, 2.0, 2.1, 2.2, etc. When the optical lens 100 satisfies the above relationship, it can effectively avoid the difficulty in lens manufacturing caused by the excessive thickness of the first lens L1 or the excessive curvature of the object side surface S1 of the first lens L1, thereby reducing production costs.

[0044] In some embodiments, the optical lens 100 satisfies the relationship: 2.95≤SD1 / SD14≤3.4. Wherein, SD1 is half of the maximum effective aperture of the object side S1 of the first lens L1, and SD14 is half of the maximum effective aperture of the image side S14 of the seventh lens L7. Specifically, SD1 / SD14 can be 2.95, 3.0, 3.1, 3.2, 3.3, 3.4, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to control the shapes of the first lens L1 and the seventh lens L7, so that the overall structure of the optical lens 100 has a smooth transition without a large step difference, which is beneficial to improve the imaging quality of the optical lens 100.

[0045] In some embodiments, the optical lens 100 satisfies the relationship: 0.34≤SD1 / TTL≤0.4. Wherein, SD1 is half of the maximum effective aperture of the object side surface S1 of the first lens L1, 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 O. Specifically, SD1 / TTL can be 0.34, 0.35, 0.36, 0.37, 0.39, 0.4, etc. By controlling the relationship between the maximum effective half aperture of the object side surface S1 of the first lens L1 and the total length of the optical lens 100, it is possible to ensure that the first lens L1 has a sufficient and appropriate aperture size, and the small head design of the optical lens 100 can be achieved under the premise of collecting large-angle light entering and ensuring the imaging quality. That is, the two satisfy the above relationship, which is conducive to reducing the head size and total length of the optical lens 100, and achieving a balance between the imaging quality and miniaturization of the optical lens 100.

[0046] In some embodiments, the optical lens 100 satisfies the relationship: 1≤SD8 / SD9≤1.1. Among them, SD8 is half of the maximum effective aperture of the image side S8 of the fourth lens L4, and SD9 is half of the maximum effective aperture of the object side S9 of the fifth lens L5. Specifically, SD8 / SD9 can be 1, 1.02, 1.04, 1.06, 1.08, 1.1, etc. When the optical lens 100 satisfies the above relationship, the aperture of the image side S8 of the fourth lens L4 and the aperture of the object side S9 of the fifth lens L5 can be reasonably configured, which is beneficial to the large image surface characteristics of the optical lens 100. Therefore, when the optical lens 100 is applied to a camera module, it can match a large-sized photosensitive chip, thereby improving the imaging quality of the optical lens 100.

[0047] In some embodiments, the optical lens 100 satisfies the relationship: 3.5≤CT MAX / CT MIN ≤5.5. Among them, CT MAX is the maximum thickness of the first lens L1 to the seventh lens L7 on the optical axis O, CT MIN CT is the minimum thickness of the first lens L1 to the seventh lens L7 on the optical axis O. Specifically, CT MAX / CT MIN It can be 3.5, 3.8, 4.0, 4.5, 5.0, 5.5, etc. By properly setting CT MAX With CT MIN The relationship between can make the thickness distribution of the lens more uniform, which is beneficial to improving the spatial layout and processability of the optical lens 100.

[0048] In some embodiments, the optical lens 100 satisfies the relationship: -30≤F3 / CT3≤-10. Wherein, F3 is the effective focal length of the third lens L3, and CT3 is the thickness of the third lens L3 on the optical axis O. Specifically, F3 / CT3 can be -30, -25, -20, -18, -12, -10, etc. When the above relationship is satisfied, the thickness of the third lens L3 is appropriate, which is conducive to reducing the thickness tolerance sensitivity of the third lens L3, reducing the difficulty of the processing technology of the third lens L3, improving the assembly qualification rate of the optical lens 100, and further reducing the production cost. When the upper limit of the above relationship is exceeded, the thickness of the third lens L3 of the optical lens 100 is too small under the premise of meeting the optical performance, which is not conducive to the processing of the third lens L3, and the thickness tolerance sensitivity of the third lens L3 is high; when the lower limit of the above relationship is lower than the lower limit of the above relationship, the thickness of the third lens L3 of the optical lens 100 is too large under the premise of meeting the optical performance, which is not conducive to the design requirements of miniaturization and lightweight of the optical lens 100.

[0049] In some embodiments, the optical lens 100 satisfies the relationship: 1.7≤F5 / CT5≤3.2. Wherein, F5 is the effective focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis O. Specifically, F5 / CT5 can be 1.7, 2.0, 2.4, 2.8, 3.0, 3.2, etc. When the optical lens 100 satisfies the above conditional formula, the ratio of the effective focal length and the center thickness of the fifth lens L5 can be reasonably configured, so that the center thickness of the fifth lens L5 will not be too thin or too thick, which is conducive to reducing the tolerance sensitivity of the fifth lens L5, and at the same time, the fifth lens L5 can effectively correct the aberration caused by the deflection of light by each lens on the object side, thereby improving the imaging resolution capability of the optical lens 100.

[0050] In some embodiments, the optical lens 100 satisfies the relationship: 0.85≤CT45 / CT56≤4.3. Wherein, CT45 is the distance between the image side surface S8 of the fourth lens L4 and the object side surface S9 of the fifth lens L5 on the optical axis O, and CT56 is the distance between the image side surface S10 of the fifth lens L6 and the object side surface S11 of the sixth lens L6 on the optical axis O. Specifically, CT45 / CT56 can be 0.85, 1.5, 2.5, 3.0, 3.5, 4.3, etc. When the above relationship is satisfied, the air space between the fourth lens L4, the fifth lens L5 and the sixth lens L6 on the optical axis O can be reasonably configured, thereby further shortening the total system length of the optical lens 100, and facilitating the assembly of the optical lens 100.

[0051] In some embodiments, the optical lens 100 satisfies the relationship: 7.5≤|F67 / F|≤15. Wherein, F67 is the combined effective focal length of the sixth lens L6 and the seventh lens L7, and F is the effective focal length of the optical lens 100. Specifically, |F67 / F| can be 7.5, 9, 11, 12.5, 13.5, 15, etc. Satisfying the above relationship and reasonably configuring the ratio of the combined effective focal length of the sixth lens L6 and the seventh lens L7 to the effective focal length of the optical lens 100 is conducive to correcting the off-axis aberration of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0052] In some embodiments, the optical lens 100 satisfies the relationship: 1.4 mm -1 ≤|(Vd6-Vd7) / F67|≤3.2mm -1 Wherein, Vd6 is the Abbe number of the sixth lens L6, Vd7 is the Abbe number of the seventh lens L7, and F67 is the combined effective focal length of the sixth lens L6 and the seventh lens L7. Specifically, |(Vd6-Vd7) / F67| may be 1.4 mm -1 , 1.8mm -1 , 2.2mm -1 , 2.4mm -1 , 2.8mm -1 , 3.2mm -1 By reasonably setting the Abbe number difference between the sixth lens L6 and the seventh lens L7 and the combined effective focal length ratio of the sixth lens L6 and the seventh lens L7, the chromatic aberration of the optical lens 100 can be effectively corrected, the authenticity of the color can be restored, and the imaging quality can be improved.

[0053] In some embodiments, the optical lens 100 satisfies the relationship: 0.3≤CT6 / ET6≤0.5. Wherein, CT6 is the thickness of the sixth lens L6 on the optical axis O, and ET6 is the distance from the maximum effective aperture of the object side surface S11 of the sixth lens L6 to the maximum effective aperture of the image side surface S12 of the sixth lens L6 in the direction of the optical axis O. Specifically, |(Vd6-Vd7) / F67| can be 0.3, 0.36, 0.42, 0.46, 0.48, 0.5, etc. When the optical lens 100 satisfies the above relationship, the edge thickness and the center thickness of the sixth lens L6 are within a reasonable range, the surface shape change of the sixth lens L6 is small, and the aberrations existing in the optical lens 100 can be effectively controlled. At the same time, it is also beneficial to the processing technology and improves the production yield.

[0054] In some embodiments, the optical lens 100 satisfies the relationship: 2.3≤CT7 / ET7≤3.4. Wherein, CT7 is the thickness of the seventh lens L7 on the optical axis O, and ET7 is the distance from the maximum effective aperture of the object side surface S13 of the seventh lens L7 to the maximum effective aperture of the image side surface S14 of the seventh lens L7 in the direction of the optical axis O. Specifically, CT7 / ET7 can be 2.3, 2.5, 2.7, 2.9, 3.2, 3.4, etc. By controlling the ratio of the thickness of the seventh lens L7 on the optical axis O to the edge thickness, not only can the high-order aberrations generated by the optical lens 100 be effectively balanced, but it is also beneficial to adjust the field curvature of the seventh lens L7, thereby improving the imaging quality of the optical lens 100.

[0055] In some embodiments, the optical lens 100 satisfies the relationship: -0.5≤(R5-R6) / (R5+R6)≤-0.2. Wherein, R5 is the radius of curvature of the object side surface S5 of the third lens L3 at the optical axis O, and R6 is the radius of curvature of the image side surface S6 of the third lens L3 at the optical axis O. Specifically, (R5-R6) / (R5+R6) can be -0.5, -0.45, -0.4, -0.35, -0.3, -0.2, etc. Satisfying this relationship can reasonably set the surface shape difference between the object side surface S5 and the image side surface S6 of the third lens L3, reasonably control the shape of the third lens L3, and help reduce the sensitivity of the third lens L3 to decentering, thereby effectively correcting aberrations.

[0056] In some embodiments, the optical lens 100 satisfies the relationship: -1.2≤R9 / R10≤-0.7. Wherein, R9 is the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis O, and R10 is the radius of curvature of the image side surface S10 of the fifth lens L5 at the optical axis O. Specifically, R9 / R10 can be -1.2, -1.1, -0.99, -0.9, -0.8, -0.7, etc. When the optical lens 100 satisfies the above conditional formula, the surface shape of the fifth lens L5 can be reasonably controlled, and the astigmatism contribution of the fifth lens L5 can be effectively controlled to ensure the imaging quality of the intermediate field of view, which is conducive to correcting the aberration of the optical lens 100 and ensuring the balance of the distortion of the optical lens 100. At the same time, it avoids the object side surface S9 and the image side surface S10 of the fifth lens L5 at the optical axis O. The surface shape is too curved, which is conducive to reducing the processing difficulty of the fifth lens L5 and improving the yield rate of the fifth lens L5.

[0057] In some embodiments, the optical lens 100 satisfies the relationship: -20≤R11 / R12≤-8. Wherein, R11 is the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O, and R12 is the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis O. Specifically, R11 / R12 can be -20, -19, -16, -13, -10, -8, etc. When the optical lens 100 satisfies the above relationship, the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O and the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis O can be appropriately configured, so that the shape of the sixth lens L6 is not too curved, thereby correcting the astigmatism aberration of the optical lens 100 while reducing the sensitivity of the performance change of the optical lens 100, which is beneficial to improving the product yield.

[0058] In some embodiments, the optical lens 100 satisfies the relationship: -0.6≤R13 / R14≤-0.1, wherein R13 is the radius of curvature of the object-side surface S13 of the seventh lens L7 at the optical axis O, and R14 is the radius of curvature of the image-side surface S14 of the seventh lens L7 at the optical axis O. Specifically, R13 / R14 may be -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, etc. By constraining the ratio of the curvature radius of the object-side surface S13 of the seventh lens L7 to the image-side surface S14 of the seventh lens L7, the difference in the curvature radius of the object-side surface S13 of the seventh lens L7 and the image-side surface S14 of the seventh lens L7 is made more reasonable. When the seventh lens L7 satisfies the above relationship, the curvature radius of the object-side surface S13 of the seventh lens L7 is smaller than the curvature radius of the image-side surface S14 of the seventh lens L7, and the object-side surface S13 of the seventh lens L7 is more curved than the image-side surface S14 of the seventh lens L7, so that the incident light maintains a smaller deflection angle, which is beneficial to correcting the astigmatism generated by the front lens group (i.e., the first lens L1 to the sixth lens L6), and improving the imaging quality of the optical lens 100.

[0059] In some embodiments, the optical lens 100 satisfies the relationship: 102°≤FOV*F / IMGH≤113°. Wherein, FOV is the maximum field of view of the optical lens 100, F is the effective focal length of the optical lens 100, and IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, FOV*F / IMGH can be 102°, 104°, 106°, 108°, 111°, 113°, etc. When the optical lens 100 satisfies the above relationship, while realizing that the optical lens 100 has a large field of view, it is also beneficial to ensure the image height of the optical lens 100 and the image plane size of the image on the imaging surface IMG, so that the optical lens 100 has a suitable image plane size, and the brightness of the imaging surface IMG of the optical lens 100 is improved. When it is higher than the upper limit of the conditional expression, the image height of the optical lens 100 is smaller, resulting in the image size being too small, and the imaging surface IMG of the optical lens 100 is difficult to match and set with the photosensitive chip, which greatly reduces the relative illumination of the imaging surface IMG, and the brightness of the imaging surface IMG is darker. The captured image is prone to vignetting, which reduces the imaging quality. When it is lower than the lower limit of the conditional expression, the field of view of the optical lens 100 is smaller, resulting in a reduction in the field of view of the optical lens 100, which is not conducive to achieving wide-angle.

[0060] In some embodiments, the optical lens 100 satisfies the relationship: 72≤FNO*SD1 / IMGH≤77. Wherein, FNO is the aperture number of the optical lens 100, SD1 is half of the maximum effective aperture of the object side S1 of the first lens L1, and IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, FNO*SD1 / IMGH can be 72, 73, 74, 75, 76, 77, etc. When the optical lens 100 satisfies the above relationship, the optical lens 100 has a sufficient amount of light input, so that the maximum effective semi-aperture of the object side S1 of the first lens L1 is larger than the size of the imaging surface IMG, thereby achieving large image surface imaging while controlling the head aperture of the optical lens 100.

[0061] In some embodiments, the optical lens 100 satisfies the relationship: 1≤IMGH / (F*θ)≤1.2. Among them, IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100, F is the effective focal length of the optical lens 100, and θ is the radian value of the maximum half field of view angle of the optical lens 100. Specifically, IMGH / (F×θ) can be 1, 1.03, 1.06, 1.1, 1.15, 1.2, etc. When the optical lens 100 satisfies the above relationship, a large positive F-θ distortion can be achieved, which is conducive to realizing the ultra-wide-angle characteristics of the optical lens 100, and at the same time can effectively increase the proportion of the edge field of view of the optical lens 100 in the entire image plane, and improve the angular resolution of the edge field of view.

[0062] In some embodiments, the optical lens 100 satisfies the relationship: 6.35≤TTL / IMGH≤6.55. Wherein, 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 IMGH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, TTL / IMGH can be 6.35, 6.38, 6.41, 6.45, 6.5, 6.55, etc. When the optical lens 100 satisfies the above relationship, with the reasonable configuration of the refractive power of each lens, the optical lens 100 can obtain good lightness and thinness, have good aberration balance and image quality improvement capabilities, and can support high-pixel photosensor chips.

[0063] In some embodiments, the optical lens 100 satisfies the relationship: 1.6≤FNO≤1.65. Wherein, FNO is the aperture number of the optical lens 100. Specifically, FNO can be 1.6, 1.61, 1.62, 1.629, 1.64 or 1.65, etc. When the optical lens 100 satisfies the above relationship, it has the characteristics of a large aperture, and the optical lens 100 has a sufficient amount of light input, which can make the image taken by the optical lens 100 clearer, so that it can be suitable for shooting high-quality night scenes, starry sky and other object space scenes with low brightness. In addition, it can also avoid introducing excessive aberrations, so that the optical lens 100 achieves an overall balance.

[0064] In some embodiments, the optical lens 100 satisfies the relationship: -5≤F1 / F≤-3.5. Wherein, F1 is the effective focal length of the first lens L1, and F is the effective focal length of the optical lens 100. Specifically, F1 / F can be -5, -4.5, -4.1, -3.9, -3.7, -3.5, etc. When the optical lens 100 satisfies the above relationship, the ratio of the focal length of the first lens L1 to 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, so as to avoid introducing too much spherical aberration, and the optical lens 100 has good imaging quality.

[0065] In some embodiments, the optical lens 100 satisfies the relationship: -4.5≤F2 / F≤-3. Wherein, F2 is the effective focal length of the second lens L2, and F is the effective focal length of the optical lens 100. Specifically, F2 / F can be -4.5, -4.2, -3.9, -3.6, -3.3, -3, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to reduce the deflection angle of the light in the second lens L2, and at the same time, 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 achieving good imaging quality, and at the same time, it is also beneficial to reasonably configure the central thickness of the second lens L2, thereby shortening the total length of the optical lens 100, and it is also beneficial to expand the field of view of the optical lens 100.

[0066] In some embodiments, the optical lens 100 satisfies the relationship: 2.6≤F5 / F≤3.1. Wherein, F5 is the effective focal length of the fifth lens L5, and F is the effective focal length of the optical lens 100. Specifically, F5 / F can be 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, etc. When the optical lens 100 satisfies the above relationship, the angle of incidence of the light after being refracted by the lens group can be reduced, thereby reducing the angle of incidence of the light entering the photosensitive chip on the image side of the optical lens 100, thereby improving the photosensitivity of the photosensitive chip. When it is lower than the lower limit of the above relationship, the refractive power of the fifth lens L5 is too strong, which is prone to produce large edge aberrations and chromatic aberrations, which is not conducive to improving the resolution performance of the optical lens 100; when it exceeds the upper limit of the conditional expression, the refractive power of the fifth lens L5 is not enough to reduce the angle of incidence of the light, which is not conducive to improving the photosensitivity of the photosensitive chip.

[0067] In some embodiments, the optical lens 100 satisfies the relationship: -1.8≤F6 / F≤-1.4. Wherein, F6 is the effective focal length of the sixth lens L6, and F is the effective focal length of the optical lens 100. Specifically, F6 / F can be -1.8, 1.7, 1.6, -1.5, -1.45, -1.4, etc. By limiting the relationship between the focal length of the sixth lens L6 and the effective focal length of the optical lens 100 as described above, it is helpful to correct the aberration of the optical lens 100, and at the same time, the temperature sensitivity of the optical lens 100 can be reduced, thereby improving the imaging quality of the optical lens 100.

[0068] In some embodiments, the optical lens 100 satisfies the relationship: 1.65≤F7 / F≤1.9. Wherein, F7 is the effective focal length of the seventh lens L7, and F is the effective focal length of the optical lens 100. Specifically, F7 / F can be 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, etc. When the optical lens 100 satisfies 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 of the object side surface S13 and the image side surface S14 of the seventh lens L7 and the incident light will not become too large, and it is easy to further suppress the occurrence of high-order aberrations.

[0069] In some embodiments, the optical lens 100 satisfies the relationship: -7≤F1 / CT1≤-5.5. Wherein, F1 is the effective focal length of the first lens L1, and CT1 is the thickness of the first lens L1 on the optical axis O. Specifically, F1 / CT1 can be -7, -6.6, -6.3, -6.0, -5.8, -5.5, etc. Since the first lens L1 is closest to the object side, the first lens L1 is set to a lens with negative refractive power, so that the incident light entering the optical lens 100 at a large angle can enter smoothly, thereby expanding the field of view angle range of the optical lens 100, thereby ensuring the imaging quality of the optical lens 100.

[0070] In some embodiments, the optical lens 100 satisfies the relationship: -7≤F2 / CT2≤-6. Wherein, F2 is the effective focal length of the second lens L2, and CT2 is the thickness of the second lens L2 on the optical axis O. Specifically, F2 / CT2 can be -7, -6.8, -6.6, -6.4, -6.2, -6, etc. When the optical lens 100 satisfies the above relationship, by reasonably configuring the effective focal length of the second lens L2 and the thickness of the second lens L2 on the optical axis O, the aberration of the optical lens 100 can be effectively corrected, thereby improving the imaging quality.

[0071] In some embodiments, the optical lens 100 satisfies the relationship: 1.9≤F4 / CT4≤3.3. Wherein, F4 is the effective focal length of the fourth lens L4, and CT4 is the thickness of the fourth lens L4 on the optical axis O. Specifically, F4 / CT4 can be 1.9, 2.4, 2.4, 2.6, 2.8, 3.3, etc. When the optical lens 100 satisfies the above relationship, the fourth lens L4 can be reasonably configured to effectively control the deflection angle of the light in the optical lens 100, thereby reducing the sensitivity of the optical lens 100 and improving the resolution. When the upper limit of the above relationship is exceeded, the thickness of the fourth lens L4 is relatively thin, resulting in a too small deflection angle of the edge light, which is not conducive to correcting the aberration of the optical lens 100, and thus is not conducive to improving the imaging quality of the optical lens 100; when it is lower than the lower limit of the above relationship, the focal length of the fourth lens L4 is too small, and the positive refractive power provided to the optical lens 100 is too large, resulting in a too large deflection angle of the light in the optical lens 100.

[0072] In some embodiments, the optical lens 100 satisfies the relationship: -4≤F6 / CT6≤-2. Wherein, F6 is the effective focal length of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis O. Specifically, F6 / CT6 can be -4, -3.6, -3.3, -3, -2.5, -2, etc. When the optical lens 100 satisfies the above conditional formula, on the one hand, it can avoid the sixth lens L6 having an effective focal length that is too large and causing difficult-to-correct astigmatism, thereby improving the imaging quality of the optical lens 100; on the other hand, it can also better control the center thickness of the sixth lens L6 within a reasonable range, which is beneficial to the lightweight design of the optical lens 100 and the molding and processing of the sixth lens L6.

[0073] In some embodiments, the optical lens 100 satisfies the relationship: 0.85≤F7 / CT7≤1.3. Wherein, F7 is the effective focal length of the seventh lens L7, and CT7 is the thickness of the seventh lens L7 on the optical axis O. Specifically, F7 / CT7 can be 0.85, 0.9, 1.0, 1.1, 1.2, 1.3, etc. When the optical lens 100 satisfies the above conditional formula, the tolerance sensitivity of the center thickness of the seventh lens L7 can be reduced, and the processing difficulty of the seventh lens L7 can be reduced, which is conducive to improving the assembly yield of the optical lens 100 and further reducing the production cost. By satisfying the relationship, the effective focal length of the seventh lens L7 can be avoided to be too large, and the optical lens 100 can avoid the astigmatism that is difficult to correct, thereby improving the imaging quality of the optical lens 100. At the same time, the center thickness of the seventh lens L7 can be avoided to be too large, which is conducive to the miniaturization design of the optical lens 100.

[0074] In some embodiments, the optical lens 100 satisfies the relationship: 2.9≤R1 / R2≤3.7. Wherein, R1 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis O, and R2 is the radius of curvature of the image side surface S2 of the first lens L1 at the optical axis O. Specifically, R1 / R2 can be 2.9, 3.1, 3.2, 3.4, 3.6, 3.7, etc. When the optical lens 100 satisfies the above relationship, it can be helpful to control the shape and curvature of the first lens L1, so as to effectively reduce the aberration introduction value of the incident light, promote the aberration balance of the optical lens 100, and at the same time, reduce the processing difficulty of the first lens L1, so as to facilitate the manufacturing and molding of the first lens L1 and improve the processing technology of the optical lens 100.

[0075] In some embodiments, the optical lens 100 satisfies the relationship: 5≤R3 / R4≤11. 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. Specifically, R3 / R4 can be 5, 6, 7, 8, 9, 10, 11, etc. When the optical lens 100 satisfies the above relationship, by adjusting the radius of curvature of the second lens L2, the spherical aberration and astigmatism of the optical lens 100 can be effectively corrected, and at the same time, the sensitivity of the second lens L2 can be reduced, thereby reducing the influence of field curvature of the optical lens 100 during focusing at different object distances, thereby improving the imaging quality.

[0076] In some embodiments, the optical lens 100 satisfies the relationship: 0.4≤R5 / R6≤0.65. Wherein, R5 is the radius of curvature of the object side surface S5 of the third lens L3 at the optical axis O, and R6 is the radius of curvature of the image side surface S6 of the third lens L3 at the optical axis O. Specifically, R5 / R6 can be 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, etc. When the optical lens 100 satisfies the above relationship, in combination with the concave-convex surface of the third lens L3, the radius of curvature and the surface shape of the object side surface S5 and the image side surface S6 of the third lens L3 can be optimized, which is beneficial for the third lens L3 to reasonably cooperate with the negative refractive power of the first lens L1 and the negative refractive power of the second lens L2, thereby reducing the on-axis spherical aberration of the entire optical lens 100, and at the same time, it is beneficial to correct the optical path direction from the third lens L3 to the fourth lens L4, thereby reducing the generation of optical distortion.

[0077] In some embodiments, the optical lens 100 satisfies the relationship: -2≤R7 / R8≤-0.8. Among them, R7 is the radius of curvature of the object side surface S7 of the fourth lens L4 at the optical axis O, and R8 is the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis O. Specifically, R7 / R8 can be -2, -1.8, -1.6, -1.4, -1, -0.8, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to correct the aberrations generated by the optical lens 100, so that the refractive power of each lens of the optical lens 100 in the direction perpendicular to the optical axis O is uniformly configured, the distortion and aberration generated by the front lens are greatly corrected, and at the same time, excessive bending of the fourth lens L4 is avoided, which is easy to form and manufacture.

[0078] In some embodiments, the optical lens 100 satisfies the relationship: 0.5≤CT1 / ET1≤0.9. Wherein, CT1 is the thickness of the first lens L1 on the optical axis O, and ET1 is the distance from the maximum effective aperture of the object side S1 of the first lens L1 to the maximum effective aperture of the image side S2 of the first lens L1 in the direction of the optical axis O. Specifically, R7 / R8 can be 0.5, 0.6, 0.7, 0.8, 0.85, 0.9, etc. By reasonably controlling the thickness of the first lens L1 on the optical axis O and the edge thickness of the first lens L1, the thickness ratio of the first lens L1 can be reasonably controlled, thereby optimizing the surface bending freedom of the first lens L1, which is conducive to the effective convergence of large-angle incident light, and the light passing through the first lens L1 has a smaller deflection angle, thereby reducing the generation of stray light, thereby ensuring good imaging performance. At the same time, reasonable surface changes can optimize the processing technology of the lens and reduce the design and assembly sensitivity of the first lens L1.

[0079] In some embodiments, the optical lens 100 satisfies the relationship: 0.5≤CT2 / ET2≤0.8. Wherein, CT2 is the thickness of the second lens L2 on the optical axis O, and ET2 is the distance from the maximum effective aperture of the object side surface S3 of the second lens L2 to the maximum effective aperture of the image side surface S4 of the second lens L2 in the direction of the optical axis O. Specifically, CT2 / ET2 can be 0.5, 0.6, 0.65, 0.7, 0.75, 0.8, etc. By reasonably controlling the ratio of the thickness of the second lens L2 on the optical axis O and the edge thickness, it is beneficial to balance the aberrations generated by the lens itself and improve the imaging quality of the optical lens 100.

[0080] In some embodiments, the optical lens 100 satisfies the relationship: 0.5≤CT3 / ET3≤0.75. Wherein, CT3 is the thickness of the third lens L3 on the optical axis O, and ET3 is the distance from the maximum effective aperture of the object side S5 of the third lens L3 to the maximum effective aperture of the image side S6 of the third lens L3 in the direction of the optical axis O, that is, the edge thickness. Specifically, CT3 / ET3 can be 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, etc. Satisfying the above relationship is conducive to the processing and molding of the lens, helps to reduce the difficulty of assembly, and can effectively correct the field curvature of the system. When it is lower than the lower limit of the above relationship, the center thickness of the third lens L3 on the optical axis O is too small relative to the edge thickness, which is not conducive to the processing and molding of the lens; when it is higher than the upper limit of the above relationship, the center thickness of the third lens L3 on the optical axis O is too large, which will cause the length of the optical lens 100 at the near optical axis O to be too large, which is not conducive to the design of small size.

[0081] In some embodiments, the optical lens 100 satisfies the relationship: 1.1≤CT4 / ET4≤1.4. Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis O, and ET4 is the distance from the maximum effective aperture of the object side surface S7 of the fourth lens L4 to the maximum effective aperture of the image side surface S8 of the fourth lens L4 in the direction of the optical axis O. Specifically, CT4 / ET4 can be 1.1, 1.15, 1.2, 1.3, 1.35, 1.4, etc. When the optical lens 100 satisfies 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 where the difference in the thickness ratio between 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 relationship: 1.24≤CT5 / ET5≤1.8. Wherein, CT5 is the thickness of the fifth lens L5 on the optical axis O, and ET5 is the distance from the maximum effective aperture of the object side S9 of the fifth lens L5 to the maximum effective aperture of the image side S10 of the fifth lens L5 in the direction of the optical axis O. Specifically, CT5 / ET5 can be 1.24, 1.3, 1.4, 1.5, 1.6, 1.8, etc. By reasonably controlling the thickness of the fifth lens L5 on the optical axis O and the edge thickness of the fifth lens L5, the size of the optical lens 100 can be effectively reduced, and the telephoto characteristics of the optical lens 100 can be met; at the same time, it can also be beneficial to adjust the structure of the optical lens 100 and reduce the difficulty of lens processing and assembly.

[0083] The surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

[0084]

[0085] Among them, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the distance from any point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, c = 1 / Y, Y is the radius of curvature (that is, the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the cone constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula.

[0086] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0087] First embodiment

[0088] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figure 1As 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.

[0089] The first lens L1 has negative refractive power, the object-side surface S1 is convex at the near optical axis O, and the image-side surface S2 is concave at the near optical axis O.

[0090] The second lens L2 has negative refractive power, the object-side surface S3 is convex at the near optical axis O, and the image-side surface S4 is concave at the near optical axis O.

[0091] The third lens L3 has negative refractive power, the object-side surface S5 is concave at the near optical axis O, and the image-side surface S6 is convex at the near optical axis O.

[0092] The fourth lens L4 has positive refractive power, the object-side surface S7 is convex at the near optical axis O, and the image-side surface S8 is convex at the near optical axis O.

[0093] The fifth lens L5 has positive refractive power. The object-side surface S9 is convex at the near optical axis O, and the image-side surface S10 is convex at the near optical axis O.

[0094] The sixth lens L6 has negative refractive power. The object-side surface S11 is concave at the near optical axis O, and the image-side surface S12 is concave at the near optical axis O.

[0095] The seventh lens L7 has positive refractive power. The object-side surface S13 of the seventh lens L7 is convex at the near optical axis O. The image-side surface S14 of the seventh lens L7 is convex at the near optical axis O.

[0096] Specifically, the elements from the object side to the image side along the optical axis O of the optical lens 100 are arranged in sequence from top to bottom in Table 1a. In the same lens, the surface with a smaller surface number is the object side of the lens, and the surface with a larger surface number is the image side of the lens, such as surface numbers 1 and 2 correspond to the object side surface S1 and image side surface S2 of the first lens L1, respectively. The Y radius in Table 1a is the radius of curvature of the object side surface or image side surface of the corresponding surface number at the optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis O. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side S1 of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O. When the value is negative, it indicates that the aperture STO is set on the image side of the vertex of the next surface. If the thickness of the aperture STO is a positive value, the aperture STO is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness and effective focal length in Table 1a are all mm. And the reference wavelength of the refractive index and Abbe number of each lens in Table 1a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0097] In the first embodiment, the object-side surface and the image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 1b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the first embodiment.

[0098] Table 1a

[0099]

[0100] Table 1b

[0101]

[0102]

[0103] See also Figure 2 In (A), Figure 2 (A) in FIG. 1 shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 587 nm, 546 nm, 486 nm, 436 nm and 420 nm, respectively. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0104] See also Figure 2 In (B), Figure 2 (B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism diagram 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 It can be seen from (B) in FIG. 1 that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

[0105] See also Figure 2 (C) in Figure 2 (C) in FIG. 1 shows a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the field of view angle, in degrees. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the distortion of the optical lens 100 is well corrected.

[0106] Second embodiment

[0107] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3 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.

[0108] Furthermore, in the second embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0109] The other parameters in the second embodiment are given in the following Table 2a, and the definitions of the parameters can be obtained from the description of the above-mentioned embodiment, and are not repeated here. It can be understood 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 and Abbe number of each lens in Table 2a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0110] In the second embodiment, the object-side surface and image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 2b shows the conic constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the second embodiment.

[0111] Table 2a

[0112]

[0113]

[0114] Table 2b

[0115]

[0116] See also Figure 4 ,Depend on Figure 4 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the second embodiment 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. Figure 4 (A) Figure 4 Middle (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0117] Third embodiment

[0118] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 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.

[0119] Furthermore, in the third embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0120] The other parameters in the third embodiment are given in the following Table 3a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be 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 and Abbe number of each lens in Table 3a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0121] In the third embodiment, the object-side surface and image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 3b shows the conic constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the third embodiment.

[0122] Table 3a

[0123]

[0124] Table 3b

[0125]

[0126]

[0127] See also Figure 6 ,Depend on Figure 6 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the third embodiment 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. Figure 6 (A) Figure 6 Middle (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0128] Fourth embodiment

[0129] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 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.

[0130] Furthermore, in the fourth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0131] The other parameters in the fourth embodiment are given in the following Table 4a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 4a are all mm. The reference wavelength of the refractive index and Abbe number of each lens in Table 4a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0132] In the fourth embodiment, the object-side surface and image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 4b shows the conic constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the fourth embodiment.

[0133] Table 4a

[0134]

[0135]

[0136] Table 4b

[0137]

[0138] See also Figure 8 ,Depend on Figure 8 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fourth embodiment 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. Figure 8 (A) Figure 8 Middle (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0139] Fifth embodiment

[0140] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 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.

[0141] Furthermore, in the fifth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0142] The other parameters in the fifth embodiment are given in the following Table 5a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 5a are all mm. The reference wavelength of the refractive index and Abbe number of each lens in Table 5a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0143] In the fifth embodiment, the object-side surface and image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 5b shows the cone constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the fifth embodiment.

[0144] Table 5a

[0145]

[0146] Table 5b

[0147]

[0148]

[0149] See also Fig.10 ,Depend on Fig.10 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fifth embodiment 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. Fig.10 (A) Fig.10 Middle (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0150] Sixth embodiment

[0151] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11As 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.

[0152] Furthermore, in the sixth embodiment, the refractive power and the surface shape of each lens are consistent with the refractive power and the surface shape of each lens in the first embodiment.

[0153] The other parameters in the sixth embodiment are given in the following Table 6a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood 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 and Abbe number of each lens in Table 6a is 587.56nm, and the reference wavelength of the effective focal length is 546nm.

[0154] In the sixth embodiment, the object-side surface and the image-side surface of the second lens L2, the third lens L3, the fourth lens L4 and the seventh lens L7, and the image-side surface of the sixth lens L6 are all aspherical surfaces. Table 6b shows the conic constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the sixth embodiment.

[0155] Table 6a

[0156]

[0157]

[0158] Table 6b

[0159]

[0160] See also Fig.12 ,Depend on Fig.12 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the sixth embodiment 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. Fig.12 (A) Fig.12 Middle (B) and Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0161] Table 7 shows the values ​​of multiple relational expressions in the optical lens 100 of the first to sixth embodiments.

[0162] Table 7

[0163]

[0164]

[0165] See also Fig.13 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. The camera module 200 with the optical lens 100 can realize the miniaturization design of the optical lens 100, and at the same time make the optical lens 100 have the characteristics of a large field of view, thereby improving the imaging quality of the optical lens 100.

[0166] See also Fig.14 The embodiment of the present application also discloses a terminal device 300, which includes a housing 301 and the camera module 200, and the camera module 200 is arranged in the housing 301. The terminal device 300 may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, etc. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100, that is, it can realize the miniaturization design of the optical lens 100, and at the same time, the optical lens 100 has the characteristics of a large field of view, thereby improving the imaging quality of the optical lens 100.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. An optical lens, characterized in that: There are seven lenses with refractive power, including: The first lens has negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The second lens has negative refractive power, the object side surface is convex at the near optical axis, and the image side surface is concave at the near optical axis; The third lens has negative refractive power, the object side surface is concave at the near optical axis, and the image side surface is convex at the near optical axis; The fourth lens has positive refractive power, and both the object side and the image side are convex at the near optical axis; The fifth lens has positive refractive power, and both the object side and the image side are convex at the near optical axis; The sixth lens has negative refractive power, and both the object side and the image side are concave near the optical axis; The seventh lens has positive refractive power, and both the object side and the image side are convex at the near optical axis; The optical lens satisfies the following relationship: 200°≤FOV≤210°, 11.5≤TTL / F≤12.5; 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: 0.5≤F / IMGH≤0.55, and / or, 120°≤FOV / FNO≤130°, and / or, 1.8≤∑CT / ∑AT≤2.4; Wherein, IMGH is the radius of the maximum effective imaging circle on the imaging plane of the optical lens, FNO is the aperture number of the optical lens, ∑CT is the sum of the thicknesses of all lenses from the first lens to the seventh lens on the optical axis, and ∑AT is the sum of the air intervals between two adjacent lenses from the first lens to the seventh lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.8≤BFL / F≤2.4, and / or, 7.5≤R1 / F≤9.5, and / or, 3.8≤F4 / F≤4.2, and / or, -12≤F3 / F≤-5; Among them, BFL is the distance from the image side surface of the seventh lens to the imaging surface of the optical lens on the optical axis, R1 is the curvature radius of the object side surface of the first lens at the optical axis, F4 is the effective focal length of the fourth lens, and F3 is the effective focal length of the third lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 1.4≤SAGS1 / CT1≤2.2, and / or, 2.95≤SD1 / SD14≤3.4, and / or, 0.34≤SD1 / TTL≤0.4, and / or, 1≤SD8 / SD9≤1.1; Among them, SAGS1 is the distance from the maximum effective aperture of the object side surface of the first lens to the intersection of the object side surface of the first lens and the optical axis in the direction of the optical axis, CT1 is the thickness of the first lens on 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, SD8 is half of the maximum effective aperture of the image side surface of the fourth lens, and SD9 is half of the maximum effective aperture of the object side surface of the fifth lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 3.5≤CT MAX / CT MIN ≤5.5, and / or, -30≤F3 / CT3≤-10, and / or, 1.7≤F5 / CT5≤3.2, and / or, 0.85≤CT45 / CT56≤4.3; Among them, CT MAX is the maximum thickness of the first lens to the seventh lens on the optical axis, CT MIN is the minimum thickness of the first lens to the seventh lens on the optical axis, F3 is the effective focal length of the third lens, CT3 is the thickness of the third lens on the optical axis, F5 is the effective focal length of the fifth lens, CT5 is the thickness of the fifth lens on the optical axis, CT45 is the distance between the image side surface of the fourth lens and the object side surface of the fifth lens on the optical axis, and CT56 is the distance between the image side surface of the fifth lens and the object side surface of the sixth lens on the optical axis.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationship: 7.5≤|F67 / F|≤15, and / or, 1.4mm -1 ≤|(Vd6-Vd7) / F67|≤3.2mm -1 , and / or, 0.3≤CT6 / ET6≤0.5, and / or, 2.3≤CT7 / ET7≤3.4; Wherein, F67 is the combined effective focal length of the sixth lens and the seventh lens, Vd6 is the Abbe number of the sixth lens, Vd7 is the Abbe number of the seventh lens, CT6 is the thickness of the sixth lens on the optical axis, ET6 is the distance from the maximum effective aperture of the object side surface of the sixth lens to the maximum effective aperture of the image side surface of the sixth lens in the optical axis direction, CT7 is the thickness of the seventh lens on the optical axis, and ET7 is the distance from the maximum effective aperture of the object side surface of the seventh lens to the maximum effective aperture of the image side surface of the seventh lens in the optical axis direction.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional formula: -0.5≤(R5-R6) / (R5+R6)≤-0.2, and / or, -1.2≤R9 / R10≤-0.7, and / or, -20 ≤ R11 / R12 ≤ -8, and / or, -0.6≤R13 / R14≤-0.1; Among them, R5 is the curvature radius of the object side surface of the third lens at the optical axis, R6 is the curvature radius of the image side surface of the third lens at the optical axis, R9 is the curvature radius of the object side surface of the fifth lens at the optical axis, R10 is the curvature radius of the image side surface of the fifth lens at the optical axis, R11 is the curvature radius of the object side surface of the sixth lens at the optical axis, R12 is the curvature radius of the image side surface of the sixth lens at the optical axis, R13 is the curvature radius of the object side surface of the seventh lens at the optical axis, and R14 is the curvature radius of the image side surface of the seventh lens at the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional formula: 102°≤FOV*F / IMGH≤113°, and / or, 72 ≤ FNO*SD1 / IMGH ≤ 77, and / or, 1≤IMGH / (F*θ)≤1.2; Among them, IMGH is the radius of the maximum effective imaging circle on the imaging plane of the optical lens, FNO is the aperture number of the optical lens, SD1 is half of the maximum effective aperture of the object side of the first lens, and θ is the radian value of the maximum half field of view angle of the optical lens.

9. A camera module, characterized in that: The camera module includes a photosensitive chip and an optical lens as described in 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