Optical lens, camera module and terminal equipment

Abstract

An optical lens, a camera module and a terminal device are provided, the optical lens has seven lenses with refractive power, the optical lens sequentially comprises a first lens to a seventh lens from an object side to an image side along an optical axis, the refractive power of the first lens is negative, negative, positive, positive, positive, negative and positive, and the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface near the optical axis; the object-side surface and the image-side surface of the second lens element are respectively a concave surface and a convex surface near the optical axis; the object-side surface and the image-side surface of the third lens element are respectively a convex surface and a concave surface near the optical axis; the fourth lens element has an object-side surface and an image-side surface being convex in a paraxial region. The fifth lens element has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element has an object-side surface and an image-side surface being concave in a paraxial region. The seventh lens element has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: FOV is greater than or equal to 140 degrees and less than or equal to 150 degrees, 7.2 lt; tTL / Flt; and 7.6. The optical lens provided by the invention can realize miniaturization, has the characteristic of a large field angle, and improves the imaging quality of the optical lens.

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 increasing demand for driving safety and the continuous maturity of ADAS (Advanced Driver Assistance System) technology, the market demand for vehicle cameras has exploded. Through the front-view, rear-view, surround-view and other vehicle-mounted lenses installed on the vehicle, all-round information inside and outside the vehicle can be obtained to help the driver make correct driving behaviors. Therefore, the adaptability of the lens to the environment and the stability of imaging have become the safety guarantee during the driving process of the car.

[0003] The ADAS system has extremely high requirements for the vehicle-mounted lens. First of all, it is required to have strong light transmission ability and be able to adapt to the changes in light and dark in the external environment. At the same time, it is required that the vehicle-mounted lens has high imaging clarity and can effectively distinguish the details of the road environment. It is also required that the vehicle-mounted lens has a large field of view to better collect road information in front of the vehicle to meet the special requirements of the intelligent driving system. In addition, due to the limited installation space of the vehicle-mounted system, the size of the vehicle-mounted lens cannot be too large. Summary of the invention

[0004] In view of the above, it is necessary to propose an optical lens, a camera module and a terminal device so as to have a higher imaging quality while having a larger field of view.

[0005] To achieve the above object, in a first aspect, the present application discloses an optical lens, which has a total of seven lenses with refractive power. Along the optical axis, from the object side to the image side, it successively includes: a first lens with negative refractive power, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; a second lens with negative refractive power, the object side surface of the second lens is concave near the optical axis, and the image side surface of the second lens is convex near the optical axis; a third lens with positive refractive power, the object side surface of the third lens is convex near the optical axis, and the image side surface of the third lens is concave near the optical axis; a fourth lens with positive refractive power, the object side surface of the fourth lens is convex near the optical axis, and the image side surface of the fourth lens is convex near the optical axis; a fifth lens with positive refractive power, the object side surface of the fifth lens is convex near the optical axis, and the image side surface of the fifth lens is convex near the optical axis; a sixth lens with negative refractive power, the object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is concave near the optical axis; a seventh lens with positive refractive power, the object side surface of the seventh lens is convex near the optical axis, and the image side surface of the seventh lens is concave near the optical axis; the optical lens satisfies the following relational expressions: 140° ≤ FOV ≤ 150°, 7.2 < TTL / F < 7.6; where FOV is the maximum field of view angle of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and F is the effective focal length of the optical lens.

[0006] In the optical lens provided by the present application, the first lens has a negative refractive power, and with the surface design that the object side surface and the image side surface of the first lens are convex and concave respectively, the first lens can receive incident light at a larger angle, expand the field of view angle range of the optical lens, and obtain a large field of view angle feature, while reducing the sensitivity of the optical lens and improving the imaging quality of the optical lens; the second lens has a negative refractive power, and with the surface design that the object side surface and the image side surface of the second lens are concave and convex respectively, the transition of large-angle incident light can be smoother; the positive refractive power of the third lens and the fourth lens can balance the aberrations generated by the incident light passing through the first lens and the second lens, and further converge the incident light, which can shorten the total optical length of the optical lens, thereby realizing the optical lens The miniaturized design, combined with the surface design that the object side surface and the image side surface of the third lens are convex and concave respectively, and the object side surface and the image side surface of the fourth lens are both convex, can make the transition of the incident light smoother, improve the relative illumination of the optical lens, and reduce the tolerance sensitivity of the optical lens; the fifth lens with positive refractive power and the sixth lens with negative refractive power can balance the aberrations generated by each other, can reduce the tolerance sensitivity of the optical lens, and improve the imaging quality of the optical lens; the seventh lens has positive refractive power, and its object side surface and the image side surface are convex and concave respectively, which can effectively correct the aberrations generated by the optical lens, reduce distortion, and make the MTF (modulation transfer function) curve of the optical lens more concentrated, so as to improve the imaging clarity of the optical lens.

[0007] When 140°≤FOV≤150°, 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 TTL / F is between 7.3 and 7.5, 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.

[0008] 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.

[0009] 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

[0010] Figure 1 It is a schematic diagram of the structure of the optical lens disclosed in the first embodiment of the present application.

[0011] 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.

[0012] Figure 3 It is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of the present application.

[0013] 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.

[0014] Figure 5 It is a schematic diagram of the structure of the optical lens disclosed in the third embodiment of the present application.

[0015] 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.

[0016] Figure 7 It is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of the present application.

[0017] 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.

[0018] Fig. 9 It is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of the present application.

[0019] 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.

[0020] Fig.11 It is a schematic diagram of the structure of the optical lens disclosed in the sixth embodiment of the present application.

[0021] 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.

[0022] Fig.13 It is a structural schematic diagram of the camera module disclosed in this application.

[0023] Fig.14 It is a structural schematic diagram of the terminal device disclosed in this application. 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 positive 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 concave at the near optical axis O, and the image-side surface S4 of the second lens L2 is convex at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is concave at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, The image-side surface S8 of the fourth lens L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens L5 is convex at the near optical axis O, and the image-side surface S10 of the fifth lens L5 is convex at the near optical axis O; the object-side surface S11 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis O; the object-side surface S13 of the seventh lens L7 is convex at the near optical axis O, and the image-side surface S14 of the seventh lens L7 is concave 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, and the surface design of the object side surface S1 and the image side surface S2 of the first lens L1 being convex and concave respectively can make the first lens L1 receive incident light at a larger angle, expand the field of view range of the optical lens 100, and obtain a large field of view feature, and at the same time reduce the sensitivity of the optical lens 100 and improve the imaging quality of the optical lens 100; the second lens L2 has a negative refractive power, and the surface design of the object side surface S3 and the image side surface S4 of the second lens L2 being concave and convex respectively can make the transition of large-angle incident light smoother; the positive refractive power of the third lens L3 and the fourth lens L4 can balance the aberrations generated by the incident light passing through the first lens L1 and the second lens L2, and further converge the incident light, so as to shorten the total optical length of the optical lens 100, thereby realizing the optical lens 10 0, and the object side surface S5 and the image side surface S6 of the third lens L3 are convex and concave respectively, and the object side surface S7 and the image side surface S8 of the fourth lens L4 are convex, which can make the transition of the incident light smoother, improve the relative illumination of the optical lens 100, and reduce the tolerance sensitivity of the optical lens 100; the fifth lens L5 with positive refractive power and the sixth lens L6 with negative refractive power can balance the aberrations generated by each other, which can reduce the tolerance sensitivity of the optical lens 100 and improve the imaging quality of the optical lens 100; the seventh lens L7 has positive refractive power, and its object side surface S13 and the image side surface S14 are convex and concave respectively, which can effectively correct the aberrations generated by the optical lens 100, reduce distortion, and make the MTF (modulation transfer function) curve of the optical lens 100 more concentrated, so as to improve the imaging clarity 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, the second lens L2, the fifth lens L5 and the sixth lens L6 can be spherical lenses, and the seventh lens L7 is an aspherical lens. In this way, through the design of the combination 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 all spherical, all 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 setting the stop STO between the image side surface S6 of the third lens L3 and the object side surface S7 of the fourth lens L4, 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. It is understandable that in other embodiments, the stop STO may also be set between other lenses, and the setting may be adjusted according to actual conditions, and this embodiment does not specifically limit this.

[0032] In some embodiments, the optical lens 100 further includes a filter IR, and the filter IR is disposed between the seventh lens L7 and the imaging surface IMG of the optical lens 100. Optionally, the filter IR may be an infrared cutoff filter to filter out infrared light and pass visible light, so that the imaging is more in line with the visual experience of the human eye, thereby improving the imaging quality. In other embodiments, the filter IR may be an infrared bandpass filter to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 100, so that the optical lens 100 can image in a dark environment or special application scenarios and obtain better imaging quality. It is understandable that the filter IR can be made of plastic, or made of optical glass coating, or an infrared 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: 140°≤FOV≤150°. Wherein, FOV is the maximum field of view of the optical lens 100. Specifically, FOV can be 140.05°, 141.1°, 142.1°, 143°, 144°, 145.1°, 146°, 147°, 148°, 149°, or 149.95°, etc. When 140°≤FOV≤150°, the optical lens 100 has a larger field of view, which is beneficial for the optical lens 100 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 relation: 7.2 < TTL / F < 7.6. Herein, 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 7.25, 7.3, 7.35, 7.4, 7.45, 7.5, or 7.55, etc. Further, 7.3 < TTL / F < 7.5. When the optical lens 100 satisfies the above relation, the ratio of the total length of the optical lens 100 to the focal length of the optical lens 100 can be controlled within a reasonable range, so that not only can the miniaturization of the optical lens 100 be achieved, but also it is beneficial to better converge light rays on the imaging surface IMG, and further beneficial to improving the imaging quality of the optical lens 100.

[0036] In some embodiments, the optical lens 100 satisfies the relation: 6 < TTL / ImgH < 6.6. Herein, 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 largest effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, TTL / ImgH can be 6.05, 6.1, 6.15, 6.2, 6.25, 6.3, 6.35, 6.4, 6.45, or 6.5, etc. When the optical lens 100 satisfies the above relation, with a reasonable configuration of the refractive powers of each lens, the optical lens 100 can obtain good thinness and lightness, have good aberration balance and image quality improvement ability, and at the same time support a high-pixel photosensitive chip. In addition, ImgH can determine the size of the photosensitive chip. The larger ImgH is, the larger the maximum size of the photosensitive chip that can be supported is. If it is higher than the upper limit of the above relation, although the optical lens 100 can obtain better aberration balance and resolution, as the photosensitive chip increases, it will be difficult to compress the overall optical length, resulting in a decrease in the thinness and lightness of the optical lens 100. If it is lower than the lower limit of the above relation, the optical lens 100 will have good thinness and lightness, but the overall size being too small will greatly limit the balance of aberrations, the matching of the photosensitive chip, and the optimization of the resolution.

[0037] In some embodiments, the optical lens 100 satisfies the relationship: 1.1 < ImgH / F < 1.3. ImgH is the radius of the largest effective imaging circle on the imaging surface IMG of the optical lens 100, and F is the effective focal length of the optical lens 100. Specifically, ImgH / F can be 1.11, 1.15, 1.2, 1.25, 1.26, or 1.28, etc. When the optical lens 100 satisfies the above relationship, it can effectively correct the distortion generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100 while reducing the manufacturing difficulty of the optical lens 100; in addition, it can help control the focal length of the optical lens 100 within a reasonable range, and ensure that the optical lens 100 has a sufficient light-receiving area and a sufficient field angle, so as to simultaneously meet the characteristics of a large field angle and a large image surface.

[0038] In some embodiments, the optical lens 100 satisfies the relationship: 7 < TTL / CT4 < 10. 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 CT4 is the thickness of the fourth lens L4 on the optical axis O. Specifically, TTL / CT4 can be 7.05, 7.4, 7.8, 8.0, 8.4, 8.8, 9.0, 9.4, 9.8, 9.95, etc. By controlling the ratio relationship between the total length of the optical lens 100 and the thickness of the fourth lens L4 on the optical axis O, it is beneficial to the reasonable distribution of the entire space of the optical lens 100, making the structure of the optical lens 100 more compact. When exceeding the upper limit of the above relationship, the total length of the optical lens 100 is too long, which is not conducive to a compact structure; when lower than the lower limit of the above relationship, the fourth lens L4 is too thick, and the risk of light bending increases, which will increase the eccentricity sensitivity between the lenses, thereby being not conducive to the assembly of the optical lens 100.

[0039] In some embodiments, the optical lens 100 satisfies the relationship: -6 < CT2 / SAG21 < -4. Wherein, CT2 is the thickness of the second lens L2 on the optical axis O, and SAG21 is the distance from the maximum effective aperture of the object side surface S3 of the second lens L2 to the intersection of the object side surface S3 of the second lens L2 and the optical axis O in the direction of the optical axis O. Specifically, CT2 / SAG21 can be -5.9, -5.5, -5.0, -4.9, -4.7, -4.5, -4.2, or -4.1, etc. When the optical lens 100 satisfies the above relationship, it can effectively avoid the high manufacturing difficulty of the lens caused by the excessive thickness of the second lens L2 or the excessive curvature of the object side surface S3 of the second lens L2, thereby realizing the reduction of production costs.

[0040] In some embodiments, the optical lens 100 satisfies the relation: -10 < F2 / CT2 < -8. 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 -9.9, -9.6, -9.3, -9.0, -8.6, -8.3, or -8.1, etc. When the optical lens 100 satisfies the above relation, 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, and the imaging quality is improved.

[0041] In some embodiments, the optical lens 100 satisfies the relation: 2 < SAG12 / SAG11 < 3. Wherein, SAG12 is the distance from the maximum effective aperture of the image side S2 of the first lens L1 to the intersection of the image side S2 of the first lens L1 and the optical axis O in the direction of the optical axis O, and SAG11 is the distance from the maximum effective aperture of the object side S1 of the first lens L1 to the intersection of the object side S1 of the first lens L1 and the optical axis O in the direction of the optical axis O. Specifically, SAG12 / SAG11 can be 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, or 2.9, etc. By controlling the ratio of the sag heights at the maximum effective radii of the object side S1 and the image side S2 of the first lens L1 within a reasonable range, a reasonable surface shape can be obtained, and the surface shape of the object side S1 and the image side S2 of the first lens L1 can be made similar. In this way, on the one hand, the peripheral light can be smoothly transitioned, so as to control the light to enter the optical lens 100 with a smaller deflection angle, reduce the field curvature and distortion of the optical lens 100, and improve the resolution of the optical lens 100; on the other hand, it is beneficial to reduce the sensitivity of the first lens L1, reduce the processing difficulty of the first lens L1, and facilitate the processing and forming of the first lens L1. When exceeding the upper or lower limit of the above relation, the surface of the first lens L1 is too curved or too flat, resulting in an increase in the processing difficulty of the first lens L1 and an increase in the production cost of the first lens L1; at the same time, marginal aberration is also easily generated, which is not conducive to improving the image quality of the optical lens 100.

[0042] In some embodiments, the optical lens 100 satisfies the relational expression: -2 < F1 / F < -1.5. 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 -1.9, -1.85, -1.8, -1.75, -1.7, -1.65, -1.6, -1.55, or -1.51, etc. Since the first lens L1 is the first lens of the optical lens 100 close to the object side and provides negative refractive power for the optical lens 100, the limitation of the above relational expression can improve the aberration correction ability of the optical lens 100, improve the imaging resolution of the optical lens 100 while reducing the sensitivity of the optical lens 100, and thus improve the imaging quality of the optical lens 100.

[0043] In some embodiments, the optical lens 100 satisfies the relational expression: 80 > |F56 / F| > 10. Wherein, F56 is the combined effective focal length of the fifth lens L5 and the sixth lens L6, and F is the effective focal length of the optical lens 100. Specifically, |F56 / F| can be 11, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, or 79, etc. Further, 18 < |F56 / F| < 60. Since the fifth lens L5 has positive refractive power and the sixth lens L6 has negative refractive power, the combination of the positive and negative refractive powers of the fifth lens L5 and the sixth lens L6 can greatly correct the chromatic aberration generated in the optical lens 100. Controlling the combined effective focal length of the fifth lens L5 and the sixth lens L6 and the focal length of the optical lens 100 within a specified range can ensure the maximization of the aberration correction effect, thereby further improving the imaging quality. When |F56 / F| ≤ 10, the absolute value of the combined effective focal length of the fifth lens L5 and the sixth lens L6 is too small, the combined refractive power of the fifth lens L5 and the sixth lens L6 is too large, and the fifth lens L5 and the sixth lens L6 are prone to relatively serious astigmatism, which will affect the imaging quality of the optical lens 100.

[0044] Furthermore, the fifth lens L5 and the sixth lens L6 are cemented, which is beneficial to further enhancing the effect of chromatic aberration elimination and spherical aberration correction of the optical lens 100. In some embodiments, the optical lens 100 satisfies the relational expression: -40 < F123 / F < -1. Wherein, F123 is the combined effective focal length of the first lens L1, the second lens L2, and the third lens L3, and F is the effective focal length of the optical lens 100. Specifically, F123 / F can be -39, -35, -30, -25, -20, -15, -10, -5, or -1.5, etc. When the optical lens 100 satisfies the above relationship, the configuration relationship between the combined effective focal length of the first lens L1, the second lens L2, and the third lens L3 and the total effective focal length of the optical lens 100 can be reasonably controlled. On the one hand, the refractive power intensity of the front lens group of the optical lens 100 will not be too large, so that the optical lens 100 will not generate overly serious aberrations when obtaining light incident at a large angle; on the other hand, it is also beneficial to balance the aberrations between the positive and negative lenses in the front lens group, thereby improving the resolution and imaging quality.

[0045] In some embodiments, the optical lens 100 satisfies the relational expression: 1 < SD32 / SD41 < 1.2. Wherein, SD32 is half of the maximum effective aperture of the image side S6 of the third lens L3, and SD41 is half of the maximum effective aperture of the object side S7 of the fourth lens L4. Specifically, SD32 / SD41 can be 1.01, 1.03, 1.06, 1.09, 1.12, 1.15, 1.18, or 1.19, etc. When the optical lens 100 satisfies the above relational expression, the surface shapes of the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4 can be reasonably configured, reducing the deflection angle of the light when it exits from the third lens L3 and then enters the fourth lens L4, effectively correcting aberrations, and improving the assembly yield rate of the optical lens 100.

[0046] In some embodiments, the optical lens 100 satisfies the relational expression: 0.95 < SD51 / SD42 < 1.1. Wherein, SD51 is half of the maximum effective aperture of the object side S9 of the fifth lens L5, and SD42 is half of the maximum effective aperture of the image side S8 of the fourth lens L4. Specifically, SD51 / SD42 can be 0.96, 0.97, 0.98, 0.99, 1.00, or 1.05, etc. When the optical lens 100 satisfies the above relational expression, 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 characteristics of the large image plane of the optical lens 100. Thus, 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 relational expression: 1.4 < SD11 / ImgH < 1.55. Wherein, SD11 is half of the maximum effective aperture of the object side surface 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, SD11 / ImgH can be 1.41, 1.43, 1.47, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, etc. When the optical lens 100 satisfies the above relational expression, the first lens L1 matches the size of the half image height (i.e., half of the image height corresponding to the maximum field of view angle of the optical lens 100), thereby controlling the aperture of the first lens L1 to balance the illuminance, field of view angle, and optical total length. If it exceeds the upper or lower limit of the above relational expression, the maximum effective aperture of the first lens L1 is too large or too small, which will cause a large step difference between each lens and the imaging surface IMG, and is not conducive to the assembly of the optical lens 100 and the bearing design between the lenses.

[0048] In some embodiments, the optical lens 100 satisfies the relational expression: 0.9 < CT3 / CT34 < 1.8. Wherein, CT3 is the thickness of the third lens L3 on the optical axis O, and CT34 is the distance between the image side surface S6 of the third lens L3 and the object side surface S7 of the fourth lens L4 on the optical axis O. Specifically, CT3 / CT34 can be 0.91, 0.95, 1.01, 1.1, 1.21, 1.3, 1.41, 1.5, 1.6, 1.7, 1.75, etc. When the optical lens 100 satisfies the above relational expression, the gap between the third lens L3 and the fourth lens L4 can be greatly compressed, making the structure of the optical lens 100 compact and the fitting relationship good. Further, through the above design, light can be better guided to deflect on the surfaces of each lens with a small deflection angle, thereby reducing the tolerance sensitivity; at the same time, the reflection of stray light between the lenses can be reduced, and the risk of generating stray light and ghost images can be reduced; in addition, it is also beneficial to reduce the difficulty of lens forming manufacturing and assembly.

[0049] In some embodiments, the optical lens 100 satisfies the relational expression: 1.2 < CT4 / ET4 < 1.5. Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis O, and ET4 is the distance in the optical axis O direction from the maximum effective aperture of the object side surface S of the fourth lens L4 to the maximum effective aperture of the image side surface S of the fourth lens L4. Specifically, CT4 / ET4 can be 1.21, 1.25, 1.31, 1.36, 1.39, 1.41, 1.48, 1.48, 1.49, etc. When the optical lens 100 satisfies the above relational expression, the ratio of the center thickness to the edge thickness of the fourth lens L4 can be reasonably controlled, thereby reasonably controlling the overall thickness of the fourth lens L4 and avoiding the situation that the thickness ratio between the center thickness and the edge thickness is too large and is not conducive to processing and assembly.

[0050] In some embodiments, the optical lens 100 satisfies the relational expression: 2 < ET6 / CT6 < 3. Wherein, ET6 is the distance in the optical axis O direction from the maximum effective aperture of the object side S11 of the sixth lens L6 to the maximum effective aperture of the image side S12 of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis O. Specifically, ET6 / CT6 can be 2.1, 2.2, 2.3, 2.41, 2.51, 2.6, 2.7, 2.8, or 2.9, etc. When the optical lens 100 satisfies the above relational expression, the sixth lens L6 satisfies that the edge thickness and the center thickness are within a reasonable range, the surface shape variation of the sixth lens L6 is small, the aberration existing in the optical lens 100 can be effectively controlled, and at the same time, it is beneficial to the processing in the process and improves the production yield.

[0051] In some embodiments, the optical lens 100 satisfies the relational expression: 1 < (CT6 + CT7) / CT67 < 3. Wherein, CT6 is the thickness of the sixth lens L6 on the optical axis O, CT7 is the thickness of the seventh lens L7 on the optical axis O, and CT67 is the distance on the optical axis O between the image side S12 of the sixth lens L6 and the object side S13 of the seventh lens L7. Specifically, (CT6 + CT7) / CT67 can be 1.1, 1.41, 1.8, 2.2, 2.6, 2.8, or 2.9, etc. When the optical lens 100 satisfies the above relational expression, the thickness of the lenses in the rear lens group (the rear lens group includes the fifth lens L5, the sixth lens L6, and the seventh lens L7) of the optical lens 100 and the distance between the lenses are reasonably configured, the overall optical length can be effectively shortened, the volume of the optical lens 100 can be reduced, and at the same time, it is beneficial to the processing and assembly of the lenses in the rear lens group. When it is higher than the upper limit of the conditional expression, the distance between the rear lens groups is too small and the assembly difficulty is large; when it is lower than the lower limit of the conditional expression, the thickness of the lenses in the rear lens group on the optical axis O is too small, which easily causes the thickness of the lenses in it on the optical axis O to be too small, unable to meet the production and processing requirements, and it is difficult to ensure the forming yield.

[0052] In some embodiments, the optical lens 100 satisfies the relational expression: 5 < F7 / F < 7. 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 5.1, 5.3, 5.5, 5.7, 5.9, 6.1, 6.3, 6.51, 6.7, or 6.91, etc. When the optical lens 100 satisfies the above relational expression, the positive refractive power of the seventh lens L7 of the optical lens 100 will not become too strong, so that the angles between the normal lines of the object side S13 and the image side S14 of the seventh lens L7 and the incident light will not become too large, and it is easy to further suppress the occurrence of higher-order aberrations. When it exceeds the upper or lower limit of the above relational expression, it is not conducive to the correction of aberrations of the optical lens 100, thereby reducing the imaging quality.

[0053] In some embodiments, the optical lens 100 satisfies the relational expression: 3 < R72 / R71 < 5. Herein, R72 is the radius of curvature of the image side surface S14 of the seventh lens L7 at the optical axis O, and R71 is the radius of curvature of the object side surface S13 of the seventh lens L7 at the optical axis O. Specifically, R72 / R71 can be 3.1, 3.3, 3.5, 3.9, 4.1, 4.3, 4.5, 4.71, 4.9, etc. By restricting the ratio of the radius of curvature of the object side surface S13 of the seventh lens L7 to that of the image side surface S14 of the seventh lens L7, the difference between the radius of curvature of the object side surface S13 of the seventh lens L7 and that of the image side surface S14 of the seventh lens L7 becomes more reasonable. When the seventh lens L7 satisfies the above relational expression, the radius of curvature of the object side surface S13 of the seventh lens L7 is smaller than that 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 relative to the image side surface S14 of the seventh lens L7, so as to keep the incident light rays at a small 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.

[0054] In some embodiments, the optical lens 100 satisfies the relational expression: 120° < FOV*F / ImgH < 130°. FOV is the maximum field of view angle of the optical lens 100, F is the effective focal length of the optical lens 100, and ImgH is the radius of the largest effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, FOV*F / ImgH can be 121°, 122.5°, 123°, 124°, 125°, 126°, 127°, 128°, 129°, etc. When the optical lens 100 satisfies the above relational expression, while achieving a large field of view angle of the optical lens 100, it is also beneficial to ensure the image height of the optical lens 100, ensure the image plane size of the image on the imaging surface IMG, enable the optical lens 100 to have a suitable image plane size, and improve the brightness of the imaging surface IMG of the optical lens 100. When it is higher than the upper limit of the conditional expression, the image height of the optical lens 100 is smaller, resulting in an overly small imaging size of the image, making it difficult to match the imaging surface IMG of the optical lens 100 with the photosensitive chip, greatly reducing the relative illuminance of the imaging surface IMG, making the imaging surface IMG dim, and easily causing the phenomenon of vignetting in the captured image, thus reducing the imaging quality; when it is lower than the lower limit of the conditional expression, the field of view angle of the optical lens 100 is smaller, resulting in a reduced field of view range captured by the optical lens 100, which is not conducive to achieving wide-angleization.

[0055] In some embodiments, the optical lens 100 satisfies the relation: 2 < F * tan(FOV / 2) / ImgH < 3.2. Here, F is the effective focal length of the optical lens 100, FOV is the maximum field of view angle of the optical lens 100, and ImgH is the radius of the largest effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, F * tan(FOV / 2) / ImgH can be 2.1, 2.3, 2.5, 2.7, 2.9, 3.0, 3.1, or 3.15, etc. When the optical lens 100 satisfies the above relation, it can ensure that while shortening the overall optical length of the optical lens 100, it is also beneficial to correct the aberration of the optical lens 100, contributing to obtaining an optical lens 100 with both miniaturization and good imaging quality; at the same time, it can also endow the optical lens 100 with large-angle and large-image-plane characteristics, so as to be able to obtain more scene content and enrich the imaging information of the optical lens 100. When exceeding the upper limit of the above relation, the field of view angle of the optical lens 100 is too small, reducing the field of view range of the optical lens 100, resulting in incomplete imaging information of the optical lens 100 and affecting the shooting quality of the optical lens 100, or the focal length of the optical lens 100 is too long and it is difficult to compress the overall optical length of the optical lens 100, resulting in an increase in the volume of the optical lens 100, which is not conducive to the optical lens 100 meeting the requirements of miniaturized design. When below the lower limit of the above relation, the field of view angle of the optical lens 100 is too large, causing excessive distortion in the outer field of view, resulting in a distortion phenomenon in the periphery of the image and reducing the imaging performance of the optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies the relation: 85° < FOV / FNO < 95°. Among them, FOV is the maximum field of view angle of the optical lens 100, and FNO is the f-number of the optical lens 100. Specifically, FOV / FNO can be 85.1°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, or 94.9°, etc. When the optical lens 100 satisfies the above relation, it can reasonably control the field of view angle and the light passing amount of the optical lens 100, improve the distortion of the edge field of view, and prevent excessive light flux of the optical lens 100. If higher than the upper limit of the above relation, the field of view angle of the optical lens 100 is too large, causing excessive distortion in the edge field of view and a distortion phenomenon in the periphery of the image. In addition, it will also lead to too small an f-number, resulting in too large a light passing amount of the optical lens 100, causing non-effective light rays to also reach the imaging surface IMG, resulting in aberrations such as spherical aberration and field curvature in the imaging (especially at the edge field of view), and further leading to a decline in the imaging performance of the optical lens 100; if lower than the lower limit of the above relation, the f-number of the optical lens 100 is relatively large, resulting in insufficient light passing amount of the optical lens 100 and a decrease in the clarity of the captured image.

[0057] In some embodiments, the optical lens 100 satisfies the relationship: 1.6 < FNO < 1.7. FNO is the aperture number of the optical lens 100. Specifically, FNO can be 1.61, 1.62, 1.631, 1.641, 1.651, 1.661, 1.67, 1.681, 1.691, etc. When the optical lens 100 satisfies the above relationship, it has the characteristic of a large aperture. The optical lens 100 has sufficient light input, which can make the images captured by the optical lens 100 clearer, so that it can be applicable to object space scenes with low light brightness such as shooting high-quality night scenes and starry skies. In addition, it can also avoid introducing excessive aberrations, making the optical lens 100 achieve an overall balance.

[0058] In some embodiments, the optical lens 100 satisfies the relationship: -8 < F1 / CT1 < -6. 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 -7.9, -7.6, -7.3, -7.1, -7.0, -6.9, -6.6, -6.3, or -6.1, etc. Since the first lens L1 is closest to the object side, setting the first lens L1 as a lens with negative refractive power can allow the incident light rays entering the optical lens 100 at large angles to enter smoothly, thereby expanding the field of view angle range of the optical lens 100 and ensuring the imaging quality of the optical lens 100.

[0059] In some embodiments, the optical lens 100 satisfies the relation: 5 < F3 / CT3 < 15. Herein, 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 5.1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 14.9, etc. Since both the first lens L1 and the second lens L2 have negative refractive powers, accordingly, disposing a third lens L3 with positive refractive power is conducive to correcting marginal aberration and improving the imaging resolution of the optical lens 100. Limiting the ratio of the focal length of the third lens L3 to the thickness of the third lens L3 within a certain range is conducive to reducing the thickness tolerance sensitivity of the third lens L3, reducing the processing difficulty of the third lens L3, improving the assembly qualification rate of the optical lens 100, and further reducing the production cost. When the above relation 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 processing difficulty of the third lens L3, improving the assembly qualification rate of the optical lens 100, and further reducing the production cost. When exceeding the upper limit of the above relation, on the premise that the optical performance is satisfied, the thickness of the third lens L3 is too small, which is not conducive to processing the third lens L3, and the thickness tolerance sensitivity of the third lens L3 is high; when lower than the lower limit of the above relation, on the premise that the optical performance is satisfied, the thickness of the third lens L3 is too large, which is not conducive to the design requirements of miniaturization and light weight of the optical lens 100.

[0060] In some embodiments, the optical lens 100 satisfies the relation: 3 < F4 / CT4 < 6. Herein, 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 3.1, 3.3, 3.5, 3.7, 4.0, 4.3, 4.5, 4.7, 5.0, 5.3, 5.5, etc. When the optical lens 100 satisfies the above relation, the fourth lens L4 can be reasonably configured, and the deflection angle of the light rays in the optical lens 100 can be effectively controlled, thereby reducing the sensitivity of the optical lens 100 and improving the resolution. When exceeding the upper limit of the above relation, the thickness of the fourth lens L4 is relatively thin, resulting in too small a deflection angle of the marginal light rays, which is not conducive to correcting the aberration of the optical lens 100, and thus not conducive to improving the imaging quality of the optical lens 100; when lower than the lower limit of the above relation, the focal length of the fourth lens L4 is too small, and the positive refractive power provided for the optical lens 100 is too large, resulting in too large a deflection angle of the light rays in the optical lens 100.

[0061] In some embodiments, the optical lens 100 satisfies the relation: 10 < F5 / CT5 < 30. Herein, 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 11, 13, 15, 17, 20, 23, 25, 27, 29, etc. When the optical lens 100 satisfies the above conditional expression, the ratio of the effective focal length to the central thickness of the fifth lens L5 can be reasonably configured, so that the central thickness of the fifth lens L5 will not be too thin or too thick, which is beneficial to reducing the tolerance sensitivity of the fifth lens L5. At the same time, the fifth lens L5 can effectively correct the aberration generated by the refracted light of each lens on the object side, improving the imaging resolution of the optical lens 100. When it is lower than the lower limit of the above relation, the refractive power of the fifth lens L5 is too strong, which is not conducive to correcting the aberration of the optical lens 100, and the central thickness of the fifth lens L5 is too large, which is not conducive to reducing the sensitivity of the optical lens 100. When it exceeds the upper limit of the above relation, the refractive power of the fifth lens L5 is too strong, which is also not conducive to correcting the aberration of the optical lens 100, and the central thickness of the fifth lens L5 is too small, which is also not conducive to reducing the sensitivity of the optical lens 100.

[0062] In some embodiments, the optical lens 100 satisfies the relation: -30 < F6 / CT6 < -20. Herein, 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 -21, -22, -23, -24, -25, -26, -27, -28, -29, etc. When the optical lens 100 satisfies the above conditional expression, on the one hand, it can avoid the astigmatism that is difficult to correct due to the too large effective focal length of the sixth lens L6, thus improving the imaging quality of the optical lens 100; on the other hand, it can also better control the central thickness of the sixth lens L6 within a reasonable range, which is beneficial to both the lightweight design of the optical lens 100 and the forming and processing of the sixth lens L6.

[0063] In some embodiments, the optical lens 100 satisfies the relation: 5 < F7 / CT7 < 15. 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 5.1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 14.5, 14.9, etc. When the optical lens 100 satisfies the above conditional formula, the tolerance sensitivity of the central thickness of the seventh lens L7 can be reduced, the processing difficulty of the seventh lens L7 can be reduced, which is beneficial to improving the assembly yield of the optical lens 100, further reducing the production cost, and by satisfying the relation, it is possible to avoid the effective focal length of the seventh lens L7 from being too large and the astigmatism that is difficult to correct in the optical lens 100, thereby improving the imaging quality of the optical lens 100. At the same time, it is possible to avoid the central thickness of the seventh lens L7 from being too large, which is beneficial to the miniaturization design of the optical lens 100. When exceeding the upper or lower limit of the above relation, the tolerance sensitivity of the central thickness of the seventh lens L7 is relatively high, increasing the processing difficulty of the seventh lens L7, which is not conducive to improving the assembly yield of the optical lens 100, and further increasing the production cost.

[0064] In some embodiments, the optical lens 100 satisfies the relation: -2 < F1 / F < -1.5. 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 -1.9, -1.85, -1.81, -1.75, -1.71, -1.65, -1.6, -1.55, etc. When the optical lens 100 satisfies the above relation, 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, avoiding the introduction of excessive spherical aberration, and enabling the optical lens 100 to have good imaging quality.

[0065] In some embodiments, the optical lens 100 satisfies the relation: -15 < F2 / F < -5. 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 -14.5, -14, -13, -12, -11, -10, -9, -8, -7, -6, -5.1, etc. When the optical lens 100 satisfies the above relation, it is beneficial to reduce the deflection angle of 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. 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. In addition, it is beneficial to expand the field of view angle of the optical lens 100.

[0066] In some embodiments, the optical lens 100 satisfies the relation: 4 < F3 / F < 7. 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 4.1, 4.5, 5, 5.5, 6, 6.5, or 6.9, etc. By defining the relationship between the focal length of the third lens L3 and the effective focal length of the optical lens 100, the marginal field aberration of the optical lens 100 can be corrected, the imaging resolution of the optical lens 100 can be improved, and thus the imaging quality of the optical lens 100 can be improved. When exceeding the upper limit of the above relation, the correction ability of the optical lens 100 for chromatic aberration and aberration will be affected, and thus the imaging quality of the optical lens 100 will be affected; when lower than the lower limit of the conditional formula, the effective focal length of the optical lens 100 will be too large, resulting in a smaller field of view angle of the optical lens 100 and unable to achieve the characteristics of a large aperture and wide angle.

[0067] In some embodiments, the optical lens 100 satisfies the relation: 2 < F4 / F < 5. 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 2.1, 2.5, 3, 3.5, 4, 4.5, or 4.9, etc. When the optical lens 100 satisfies the above relation, the fourth lens L4 provides a part 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 and the first lens L1, the second lens L2, and the third lens L3 form a Gauss-like structure, which can balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3, and avoid high-order aberrations caused by too large a refractive index, thereby improving the imaging quality of the optical lens 100. When lower than the lower limit of the conditional formula, the effective focal length of the optical lens 100 is too small, which is not conducive to meeting the characteristics of long focal length telephoto. When exceeding the upper limit of the above relation, the focal length of the fourth lens L4 is too large, it is difficult to balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3, and the refractive index of the optical lens 100 is too large, which is likely to cause high-order aberrations.

[0068] In some embodiments, the optical lens 100 satisfies the relationship: 5 < F5 / F < 20. 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 5.1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, or 19.9, etc. When the optical lens 100 satisfies the above relationship, the exit angle of the light after being refracted by the lens group can be reduced, so that the incident angle of the light entering the photosensitive chip on the image side of the optical lens 100 can be reduced, thereby improving the photosensitive performance of the photosensitive chip. When exceeding the upper limit of the above relationship, the refractive power of the fifth lens L5 is too strong, and large marginal aberration and chromatic aberration are likely to occur, which is not conducive to improving the resolution performance of the optical lens 100; when lower than the lower limit of the conditional formula, the refractive power of the fifth lens L5 is not sufficient to reduce the exit angle of the light, which is not conducive to improving the photosensitive performance of the photosensitive chip.

[0069] In some embodiments, the optical lens 100 satisfies the relationship: -5 < F6 / F < -2. 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 -4.9, -4.5, -4.1, -3.9, -3.5, -3.1, -2.9, -2.5, -2.3, or -2.1, etc. By defining the relationship between the focal length of the sixth lens L6 and the effective focal length of the optical lens 100 as above, it helps to correct the aberration of the optical lens 100, and at the same time, it can reduce the temperature sensitivity of the optical lens 100, thereby improving the imaging quality of the optical lens 100. When exceeding the upper limit of the above relationship, the refractive power of the sixth lens L6 is too strong, and the ratio of the effective focal length of the sixth lens L6 to the total effective focal length of the optical lens 100 is too large, which is not conducive to the correction of the aberration of the optical lens 100, and may thus reduce the imaging quality of the optical lens 100; when lower than the lower limit of the conditional formula, the refractive power of the sixth lens L6 is too weak, and the ratio of the effective focal length of the sixth lens L6 to the total effective focal length of the optical lens 100 is too small, increasing the assembly sensitivity.

[0070] In some embodiments, the optical lens 100 satisfies the relationship: 4 < R11 / R12 < 6. Wherein, R11 is the curvature radius of the object side surface S1 of the first lens L1 at the optical axis O, and R12 is the curvature radius of the image side surface S2 of the first lens L1 at the optical axis O. Specifically, R11 / R12 can be 4.1, 4.3, 4.6, 4.9, 5.1, 5.3, 5.6, or 5.9, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to control the shape and bending degree of the first lens L1, so that the aberration introduction value of the incident light can be effectively reduced, promoting the aberration balance of the optical lens 100. At the same time, it can also reduce the processing difficulty of the first lens L1, which is beneficial to the manufacturing and forming of the first lens L1, and improves the processing technology of the optical lens 100.

[0071] In some embodiments, the optical lens 100 satisfies the relation: 0.5 < R21 / R22 < 0.7. Wherein, R21 is the curvature radius of the image side surface S4 of the second lens L2 at the optical axis O, and R22 is the curvature radius of the object side surface S3 of the second lens L2 at the optical axis O. Specifically, R21 / R22 can be 0.51, 0.53, 0.56, 0.59, 0.61, 0.63, 0.66, or 0.69, etc. When the optical lens 100 satisfies the above relation, by adjusting the curvature radius of the second lens L2, the spherical aberration and astigmatism of the optical lens 100 can be effectively corrected. At the same time, the sensitivity of the second lens L2 can be reduced, the influence of the field curvature during the focusing process of the optical lens 100 at different object distances can be reduced, and the imaging quality can be improved.

[0072] In some embodiments, the optical lens 100 satisfies the relation: 0.04 < R31 / R32 < 0.5. Wherein, R31 is the curvature radius of the image side surface S6 of the third lens L3 at the optical axis O, and R32 is the curvature radius of the object side surface S5 of the third lens L3 at the optical axis O. Specifically, R31 / R32 can be 0.0401, 0.1, 0.15, 0.2, 0.25, 0.30, 0.35, 0.4, 0.45, or 0.49, etc. When the optical lens 100 satisfies the above relation, in combination with the concave-convex surface type of the third lens L3, the curvature radii and surface types of the object side surface S5 and the image side surface S6 of the third lens L3 can be optimized, which is beneficial to 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. Thus, the on-axis spherical aberration of the entire optical lens 100 is reduced, 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 facilitating the reduction of the generation of optical distortion.

[0073] In some embodiments, the optical lens 100 satisfies the relation: -0.5 < R41 / R42 < -0.2. Wherein, R41 is the curvature radius of the image side surface S8 of the fourth lens L4 at the optical axis O, and R42 is the curvature radius of the object side surface S7 of the fourth lens L4 at the optical axis O. Specifically, R41 / R42 can be -0.49, -0.45, -0.4, -0.35, -0.3, -0.25, or -0.21, etc. When the optical lens 100 satisfies the above relation, it is beneficial to correct the aberration generated by the optical lens 100, so that the refractive power configuration of each lens of the optical lens 100 in the direction perpendicular to the optical axis O is uniform, the distortion and aberration generated by the front lens are greatly corrected, and at the same time, the excessive bending of the fourth lens L4 is avoided, which is easy to form and manufacture.

[0074] In some embodiments, the optical lens 100 satisfies the relational expression: -1.5 < R51 / R52 < -0.5. Wherein, R51 is the curvature radius of the image side S10 of the fifth lens L5 at the optical axis O, and R52 is the curvature radius of the object side S9 of the fifth lens L5 at the optical axis O. Specifically, R51 / R52 can be -1.49, -1.4, -1.3, -1.2, -1.1, -1, -0.9, -0.8, -0.7, -0.6 or -0.51, etc. When the optical lens 100 satisfies the above conditional expression, the surface shape of the fifth lens L5 can be reasonably controlled, the contribution of the astigmatism of the fifth lens L5 can be effectively controlled, the imaging quality of the middle field of view can be guaranteed, which is beneficial to correcting the aberration of the optical lens 100, ensuring the balance of the distortion amount of the optical lens 100. At the same time, it is possible to avoid the surface shapes of the object side S9 and the image side S10 of the fifth lens L5 at the optical axis O from being too curved, which is beneficial to reducing the processing difficulty of the fifth lens L5 and improving the yield rate of the fifth lens L5.

[0075] In some embodiments, the optical lens 100 satisfies the relational expression: 0 > R61 / R62 > -0.6. Wherein, R61 is the curvature radius of the image side S12 of the sixth lens L6 at the optical axis O, and R62 is the curvature radius of the object side S11 of the sixth lens L6 at the optical axis O. Specifically, R61 / R62 can be -0.59, -0.5, -0.4, -0.3, -0.2, -0.1 or -0.01, etc. When the optical lens 100 satisfies the above relational expression, the curvature radius of the object side S11 of the sixth lens L6 at the optical axis O and the curvature radius of the image side S12 of the sixth lens L6 at the optical axis O can be appropriately configured, so that the shape of the sixth lens L6 will not be too curved. Thus, while correcting the astigmatism aberration of the optical lens 100, it is also possible to reduce the sensitivity of the performance change of the optical lens 100, which is beneficial to improving the product yield rate.

[0076] The surface shapes of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0077]

[0078] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, 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 (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface formula.

[0079] The optical lens 100 of this embodiment will be described in detail below in combination with specific parameters.

[0080] First Embodiment

[0081] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0082] Further, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive 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.

[0083] Furthermore, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is concave at the near optical axis O, and the image-side surface S4 of the second lens L2 is convex at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is concave at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O , the image-side surface S8 of the fourth lens L4 is convex at the near optical axis O; the object-side surface S9 of the fifth lens L5 is convex at the near optical axis O, and the image-side surface S10 of the fifth lens L5 is convex at the near optical axis O; the object-side surface S11 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis O; the object-side surface S13 of the seventh lens L7 is convex at the near optical axis O, and the image-side surface S14 of the seventh lens L7 is concave at the near optical axis O.

[0084] 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.

[0085] In the first embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 1b 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 first embodiment.

[0086] Table 1a

[0087]

[0088] Table 1b

[0089]

[0090] See also Figure 2 In (A), Figure 2 (A) in FIG. 2 shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, 436 nm and 410 nm, respectively. The abscissa along the X-axis direction represents the focus offset in mm, and the ordinate along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 2 that the spherical aberration value of the optical lens 100 in the first embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0091] 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.

[0092] 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.

[0093] Second embodiment

[0094] 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, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0095] 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.

[0096] 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.

[0097] In the second embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 2b 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 second embodiment.

[0098] Table 2a

[0099]

[0100]

[0101] Table 2b

[0102]

[0103] 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.

[0104] Third embodiment

[0105] 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, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0106] 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.

[0107] 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.

[0108] In the third embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 3b 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 third embodiment.

[0109] Table 3a

[0110]

[0111] Table 3b

[0112]

[0113] 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.

[0114] Fourth embodiment

[0115] 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, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0116] 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.

[0117] 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.

[0118] In the fourth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 4b 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 fourth embodiment.

[0119] Table 4a

[0120]

[0121] Table 4b

[0122]

[0123] 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.

[0124] Fifth embodiment

[0125] 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, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0126] 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.

[0127] The other parameters in the fifth 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. And 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.

[0128] In the fifth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both 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.

[0129] Table 5a

[0130]

[0131] Table 5b

[0132]

[0133] 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.

[0134] Sixth embodiment

[0135] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, 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.

[0136] 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.

[0137] 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.

[0138] In the sixth embodiment, the object-side surface S13 and the image-side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 6b 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 sixth embodiment.

[0139] Table 6a

[0140]

[0141] Table 6b

[0142]

[0143]

[0144] 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.

[0145] Table 7 shows FOV, TTL / F, TTL / ImgH, ImgH / F, TTL / CT4, CT2 / SAG21, F2 / CT2, SAG12 / SAG11, F1 / F, |F56 / F|, F123 / F, SD32 / SD41, SD51 / SD42, SD11 / ImgH, CT3 / CT34, CT4 / ET4, ET6 / CT6, (CT6+CT7) / CT67 in the optical lens 100 of the first embodiment to the sixth embodiment. , F7 / F, R72 / R71, FOV*F / ImgH, F*tan(FOV / 2) / ImgH, FOV / FNO, FNO, F1 / CT1, F3 / CT3, F4 / CT4, F5 / CT5, F6 / CT 6. Values ​​of F7 / CT7, F1 / F, F2 / F, F3 / F, F4 / F, F5 / F, F6 / F, R11 / R12, R21 / R22, R31 / R32, R41 / R42, R51 / R52 and R61 / R62.

[0146] Table 7

[0147]

[0148]

[0149] See also Fig.13The 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.

[0150] 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.

[0151] 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 a total of seven lenses with refractive power, which successively include, from the object side to the image side along the optical axis: The first lens, which has negative refractive power. The object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis. The second lens, which has negative refractive power. The object side surface of the second lens is concave near the optical axis, and the image side surface of the second lens is convex near the optical axis. The third lens, which has positive refractive power. The object side surface of the third lens is convex near the optical axis, and the image side surface of the third lens is concave near the optical axis. The fourth lens, which has positive refractive power. The object side surface of the fourth lens is convex near the optical axis, and the image side surface of the fourth lens is convex near the optical axis. The fifth lens, which has positive refractive power. The object side surface of the fifth lens is convex near the optical axis, and the image side surface of the fifth lens is convex near the optical axis. The sixth lens, which has negative refractive power. The object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is concave near the optical axis. The seventh lens, which has positive refractive power. The object side surface of the seventh lens is convex near the optical axis, and the image side surface of the seventh lens is concave near the optical axis. The optical lens satisfies the following relationships: 140° ≤ FOV ≤ 150°, 7.2 < TTL / F < 7.6; Wherein, FOV is the maximum field of view angle of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and 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 relationships: 6 < TTL / ImgH < 6.6, and / or, 1.1 < ImgH / F < 1.3, and / or, 7 < TTL / CT4 < 10; Wherein, ImgH is the radius of the largest effective imaging circle on the imaging surface of the optical lens, and CT4 is the thickness of the fourth lens on the optical axis.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: -6 < CT2 / SAG21 < -4, and / or, -10 < F2 / CT2 < -8, and / or, 2 < SAG12 / SAG11 < 3; Wherein, CT2 is the thickness of the second lens on the optical axis, SAG21 is the distance in the optical axis direction from the maximum effective aperture of the object side surface of the second lens to the intersection of the object side surface of the second lens and the optical axis, F2 is the effective focal length of the second lens, SAG12 is the distance in the optical axis direction from the maximum effective aperture of the image side surface of the first lens to the intersection of the image side surface of the first lens and the optical axis, and SAG11 is the distance in the optical axis direction 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.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: -2 < F1 / F < -1.5, and / or, |F56 / F| > 10, and / or, -40 < F123 / F < -1; Wherein, F1 is the effective focal length of the first lens, F56 is the combined effective focal length of the fifth lens and the sixth lens, and F123 is the combined effective focal length of the first lens, the second lens, and the third lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 1 < SD32 / SD41 < 1.2, and / or, 0.95 < SD51 / SD42 < 1.1, and / or, 1.4 < SD11 / ImgH < 1.55; wherein, SD32 is half of the maximum effective aperture of the image side of the third lens, SD41 is half of the maximum effective aperture of the object side of the fourth lens, SD51 is half of the maximum effective aperture of the object side of the fifth lens, SD42 is half of the maximum effective aperture of the image side of the fourth lens, SD11 is half of the maximum effective aperture of the object side of the first lens, and ImgH is the radius of the maximum effective imaging circle on the imaging surface of the optical lens.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 0.9 < CT3 / CT34 < 1.8, and / or, 1.2 < CT4 / ET4 < 1.5, and / or, 2 < ET6 / CT6 < 3; wherein, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance on the optical axis between the image side of the third lens and the object side of the fourth lens, CT4 is the thickness of the fourth lens on the optical axis, ET4 is the distance in the optical axis direction from the maximum effective aperture of the object side of the fourth lens to the maximum effective aperture of the image side of the fourth lens, ET6 is the distance in the optical axis direction from the maximum effective aperture of the object side of the sixth lens to the maximum effective aperture of the image side of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 1 < (CT6 + CT7) / CT67 < 3, and / or, 5 < F7 / F < 7, and / or, 3 < R72 / R71 < 5; wherein, CT6 is the thickness of the sixth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, CT67 is the distance on the optical axis between the image side of the sixth lens and the object side of the seventh lens, F7 is the effective focal length of the seventh lens, R72 is the curvature radius of the image side of the seventh lens on the optical axis, and R71 is the curvature radius of the object side of the seventh lens on the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 120° < FOV*F / ImgH < 130°, and / or, 2 < F*tan(FOV / 2) / ImgH < 3.2, and / or, 85° < FOV / FNO < 95°; wherein, ImgH is the radius of the maximum effective imaging circle on the imaging surface of the optical lens, and FNO is the aperture number of the optical lens.

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

10. A terminal device, characterized in that: It includes a housing and the imaging module according to claim 9, and the imaging module is disposed in the housing.

Images