Optical lens, camera module and terminal device

Abstract

An optical lens, a camera module and a terminal device, the optical lens has seven lenses with refractive power in total, comprising a first lens to a seventh lens in sequence from an object side to an image side along an optical axis, the refractive power of the lenses is negative, negative, positive, positive, positive, negative and positive respectively, the object side surface and the image side surface of the first lens are convex and concave respectively at a near optical axis; the object side surface and the image side surface of the second lens are concave and convex respectively at the near optical axis; the object side surface and the image side surface of the third lens are convex and concave respectively at the near optical axis; the object side surface and the image side surface of the fourth lens are both convex at the near optical axis; the object side surface and the image side surface of the fifth lens are both convex at the near optical axis; the object side surface and the image side surface of the sixth lens are both concave at the near optical axis; the object side surface and the image side surface of the seventh lens are convex and concave respectively at the near optical axis; the optical lens satisfies the relationship: 140°<=FOV<=150°, 7.2<TTL / F<7.6. The optical lens provided in the application can realize miniaturization, has the characteristics of a large field of view, and improves the imaging quality of the optical lens.

Description

TECHNICAL FIELD

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

[0002] With the continuous improvement of people's demand for driving safety and the continuous maturity of ADAS (Advanced Driver Assistance System) technology, the market demand for vehicle-mounted cameras is growing explosively. Through the front, rear, and surround view vehicle-mounted lenses mounted on vehicles, the all-around information inside and outside the vehicle can be obtained, thereby helping the driver to make the correct driving behavior. Therefore, the adaptability of the lens to the environment and the imaging stability become the safety guarantee in the process of driving.

[0003] The ADAS system has very high requirements for the vehicle-mounted lens. First, it requires strong light transmission capability to adapt to the changes in the external environment. At the same time, it requires the vehicle-mounted lens to have high imaging clarity to effectively distinguish the details of the road environment. In addition, the vehicle-mounted lens is required to have a large field of view to better collect the 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 volume of the vehicle-mounted lens cannot be too large. SUMMARY

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

[0005] In order to achieve the above object, in a first aspect, the application discloses an optical lens, which has seven lenses with refractive power in total, and sequentially comprises, from the object side to the image side along the optical axis: 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; and 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 relationship: 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.

[0006] The optical lens provided in the application has the following advantages. The first lens has negative refractive power, and the surface type design of the object side surface and the image side surface of the first lens is convex and concave respectively, so that the first lens can receive a larger angle of incident light, expand the field of view angle range of the optical lens, obtain a large field of view angle characteristic, reduce the sensitivity of the optical lens, and improve the imaging quality of the optical lens. The second lens has negative refractive power, and the surface type design of the object side surface and the image side surface of the second lens is concave and convex respectively, so that the transition of the large-angle incident light is more gentle. The positive refractive power of the third lens and the fourth lens can balance the aberration generated by the incident light passing through the first lens and the second lens, further converge the incident light, shorten the total optical length of the optical lens, and thus realize the miniaturization design of the optical lens. In addition, the surface type design of the object side surface and the image side surface of the third lens is convex and concave respectively, and the surface type design of the object side surface and the image side surface of the fourth lens is both convex, so that the transition of the incident light is more gentle, the relative luminance of the optical lens is improved, and the tolerance sensitivity of the optical lens is reduced. The fifth lens with positive refractive power and the sixth lens with negative refractive power can balance the aberration generated by each other, 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 the surface type design of the object side surface and the image side surface of the seventh lens is convex and concave respectively, so that the aberration generated by the optical lens can be effectively corrected, the distortion is reduced, the MTF (modulation transfer function) curve of the optical lens is more concentrated, and the imaging clarity of the optical lens is improved.

[0007] When 140°≤FOV≤150°, the optical lens has a large field of view angle, which is beneficial to the optical lens to obtain more scene content, and thus enrich 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 is controlled within a reasonable range, so that the miniaturization of the optical lens can be realized, the light can be better converged on the imaging surface, and thus the imaging quality of the optical lens is improved.

[0008] In a second aspect, the application discloses a camera module, which comprises a photosensitive chip and the optical lens as described in the first aspect, and the photosensitive chip is arranged on the image side of the optical lens. The camera module with the optical lens can realize the miniaturization design of the optical lens, and the optical lens has the characteristic of a large field of view angle, and the imaging quality of the optical lens is improved.

[0009] In a third aspect, the application discloses a terminal device, which comprises a shell and the camera module as described in the second aspect, and the camera module is arranged on the shell. The electronic device with the camera module can realize the miniaturization design of the optical lens, and the optical lens has the characteristic of a large field of view angle, and the imaging quality of the optical lens is improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structure diagram of an optical lens disclosed by a first embodiment of the present application.

[0011] Figure 2 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the first embodiment of the present application.

[0012] Figure 3 is a structure diagram of an optical lens disclosed by a second embodiment of the present application.

[0013] Figure 4 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the second embodiment of the present application.

[0014] Figure 5 is a structure diagram of an optical lens disclosed by a third embodiment of the present application.

[0015] Figure 6 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the third embodiment of the present application.

[0016] Figure 7 is a structure diagram of an optical lens disclosed by a fourth embodiment of the present application.

[0017] Figure 8 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the fourth embodiment of the present application.

[0018] Figure 9 is a structure diagram of an optical lens disclosed by a fifth embodiment of the present application.

[0019] Figure 10 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the fifth embodiment of the present application.

[0020] Figure 11 is a structure diagram of an optical lens disclosed by a sixth embodiment of the present application.

[0021] Figure 12 is a longitudinal spherical aberration curve, an astigmatism curve and a distortion curve of the optical lens disclosed by the sixth embodiment of the present application.

[0022] Figure 13 is a structure diagram of a camera module disclosed by the present application.

[0023] Figure 14 is a structure diagram of a terminal device disclosed by the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] In a first aspect, referring to Figure 1 The optical lens 100 disclosed in the embodiments of the present application has seven lenses with refractive power, which are sequentially arranged along the optical axis O from the object side to the image side as the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 in sequence from the object side of the first lens L1, and finally form 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, and 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 by the embodiment of the present application, the first lens L1 has negative refractive power, and the object side S1 and the image side S2 of the first lens L1 are respectively designed as convex and concave surface types, which can make the first lens L1 receive a larger angle of incident light, expand the field of view angle range of the optical lens 100, so as to obtain a large field of view angle characteristic, and at the same time, can reduce the sensitivity of the optical lens 100 and improve the imaging quality of the optical lens 100; the second lens L2 has negative refractive power, and the object side S3 and the image side S4 of the second lens L2 are respectively designed as concave and convex surface types, which can make the transition of the large angle of incident light more gentle; the positive refractive power of the third lens L3 and the fourth lens L4 can balance the aberration generated by the incident light passing through the first lens L1 and the second lens L2, and further converge the incident light, which can shorten the total optical length of the optical lens 100, and then realize the miniaturization design of the optical lens 100, and the object side S5 and the image side S6 of the third lens L3 are respectively designed as convex and concave surface types, and the object side S7 and the image side S8 of the fourth lens L4 are both designed as convex surface types, which can make the transition of the incident light more gentle, improve the relative luminance 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 aberration 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 the object side S13 and the image side S14 of the seventh lens L7 are respectively designed as convex and concave surface types, which can effectively correct the aberration generated by the optical lens 100, reduce distortion, make the MTF (Modulation Transfer Function) curve of the optical lens 100 more concentrated, and 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, etc., or on a car, 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 good optical effect, and at the same time, the influence of temperature on the above lenses can be reduced. Of course, among the multiple lenses of the optical lens 100, part of the lenses can be made of glass material, and part of the lenses can be made of plastic material, so that the influence of temperature on the lenses is reduced to achieve better imaging effect, and at the same time, the processing cost of the lenses and the weight of the lenses are 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 as plastic, so as to reduce the overall weight of the optical lens 100.

[0030] In some embodiments, the spherical lens has the characteristics of simple manufacturing process and low production cost, and can facilitate flexible design of the surface of the lens and improve the imaging resolution of the optical lens 100. The aspherical lens can make the object side or image side of the lens have more flexible design, so that the lens can well solve the problems of unclear imaging, distorted view or narrow field of view in the case of small size and thin thickness, and the optical lens 100 can have good imaging quality without setting too many lenses, which is beneficial to shorten 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 combination design of spherical and aspherical lenses, the processability of each lens can be improved, the surface design is facilitated, the object side or image side of the lens has more flexible design, each lens can well solve the problems of unclear imaging, distorted view or narrow field of view in the case of small size and thin thickness, and the optical lens 100 can have good imaging quality without setting 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 the lenses in the optical lens 100 can be spherical, aspherical or any combination of spherical and aspherical, which can be selected according to actual needs, and therefore is not limited in this embodiment.

[0031] In some embodiments, the optical lens 100 further comprises a stop STO, which can be an aperture stop and / or a field stop. For example, the stop STO can be an aperture stop, or the stop STO can be a field stop, or the stop STO can be an aperture stop and a field stop. By setting the stop STO between the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4, the exit pupil can be 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 realizing miniaturization. It can be understood that in other embodiments, the stop STO can also be set between other lenses, which can be adjusted according to actual conditions, and this embodiment does not make specific limitations.

[0032] In some embodiments, the optical lens 100 further comprises an optical filter IR, which is arranged between the seventh lens L7 and an imaging surface IMG of the optical lens 100. Optionally, the optical filter IR can be an infrared cut-off filter, which filters out infrared light and passes visible light, so that the imaging is more consistent with the visual experience of the human eye, thereby improving the imaging quality. In other embodiments, the optical filter IR can be an infrared band-pass filter, which passes infrared light and reflects visible light, so as to realize infrared imaging of the optical lens 100, so that the optical lens 100 can image and obtain better imaging quality in a dark environment or a special application scenario. It can be understood that the optical filter IR can be made of plastic, or can be made of optical glass coating, or other materials of the infrared filter IR, which can be selected according to actual needs, and is not specifically limited in the present embodiment.

[0033] In some embodiments, the optical lens 100 further comprises a protective glass CG, which is arranged between the optical filter IR and the imaging surface IMG of the optical lens 100, so as to protect and prevent dust from affecting the photosensitive chip. The protective glass CG can be made of plastic, or can be made of optical glass coating, or other materials of the protective glass CG, which can be selected according to actual needs, and is not specifically limited in the present embodiment. It can be understood that the protective glass CG can be part of the optical lens 100, or can be removed from the optical lens 100, but the total optical length of the optical lens 100 remains unchanged when the protective glass CG is removed.

[0034] In some embodiments, the optical lens 100 satisfies the relationship: 140°≤FOV≤150°. Wherein, FOV is the maximum field of view angle 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 angle, which is beneficial to 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 a relationship: 7.2 < TTL / F < 7.6. Wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis 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 relationship, the ratio of the total length of the optical lens 100 and the focal length of the optical lens 100 can be controlled within a reasonable range, so as to not only realize the miniaturization of the optical lens 100, but also be conducive to better convergence of light on the imaging surface IMG, thereby being conducive to improving the imaging quality of the optical lens 100.

[0036] In some embodiments, the optical lens 100 satisfies a relationship: 6 < TTL / ImgH < 6.6. Wherein, TTL is the distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis 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 relationship, in combination with the reasonable configuration of the refractive power of each lens, the optical lens 100 can obtain good thinness, good aberration balance and image quality improvement capability, and can support high-pixel photosensitive chips. In addition, ImgH can determine the size of the photosensitive chip. The larger the 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 relationship, although the optical lens 100 can obtain better aberration balance and resolving power, as the photosensitive chip increases, the optical total length will be difficult to compress, so that the thinness of the optical lens 100 decreases. If it is lower than the lower limit of the above relationship, the optical lens 100 will have good thinness, but the overall size is too small, which will greatly limit the balance of aberration, the matching of the photosensitive chip and the optimization of resolving power.

[0037] In some embodiments, the optical lens 100 satisfies a relationship: 1.1 < ImgH / F < 1.3. ImgH is a radius of a maximum effective imaging circle on the imaging surface IMG of the optical lens 100, and F is an 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, the distortion generated by the optical lens 100 can be effectively corrected, thereby reducing the manufacturing difficulty of the optical lens 100 while improving the imaging quality of the optical lens 100; in addition, it can help to control the focal length of the optical lens 100 within a reasonable range, and ensure that the optical lens 100 has sufficient light collection area and sufficient field of view angle, thereby simultaneously satisfying the characteristics of large field of view angle and large image surface.

[0038] In some embodiments, the optical lens 100 satisfies a relationship: 7 < TTL / CT4 < 10. Wherein, TTL is a distance from the object side S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and CT4 is a 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 optical lens 100 space, so that the structure of the optical lens 100 is more compact. When the upper limit of the above relationship is exceeded, the total length of the optical lens 100 is too long, which is not conducive to compact structure; when the lower limit of the above relationship is exceeded, the fourth lens L4 is too thick, the risk of light bending is increased, which increases the eccentricity sensitivity between lenses, thereby not conducive to the assembly of the optical lens 100.

[0039] In some embodiments, the optical lens 100 satisfies a relationship: -6 < CT2 / SAG21 < -4. Wherein, CT2 is a thickness of the second lens L2 on the optical axis O, and SAG21 is a distance from the maximum effective aperture of the object side S3 of the second lens L2 to the intersection of the object side S3 of the second lens L2 and the optical axis O on 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 difficulty of lens manufacturing caused by the excessive thickness of the second lens L2 or the excessive bending of the object side S3 of the second lens L2, thereby reducing the production cost.

[0040] In some embodiments, the optical lens 100 satisfies a relationship: -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 relationship, by reasonably configuring the effective focal length of the second lens L2 and the thickness of the second lens L2 on the optical axis O, the aberration of the optical lens 100 can be effectively corrected, and the imaging quality is improved.

[0041] In some embodiments, the optical lens 100 satisfies a relationship: 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 of the maximum effective radius 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 similar. On the one hand, the peripheral light can be smoothly transitioned, so as to control the light entering the optical lens 100 with a small deflection angle, reduce the field curvature and distortion of the optical lens 100, and improve the resolving power 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 molding of the first lens L1. When the upper limit or the lower limit of the above relationship is exceeded, the surface of the first lens L1 is too curved or too flat, which increases the processing difficulty of the first lens L1 and increases the production cost of the first lens L1. At the same time, it is also easy to produce edge aberration, which is not conducive to improving the image quality of the optical lens 100.

[0042] In some embodiments, the optical lens 100 satisfies a relationship: -2 < F1 / F < -1.5, where F1 is an effective focal length of the first lens L1, and F is an 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 close to the object side of the optical lens 100 and provides negative refractive power for the optical lens 100, the above relationship 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 a relationship: 80 > |F56 / F| > 10, where F56 is a combined effective focal length of the fifth lens L5 and the sixth lens L6, and F is an 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 positive and negative refractive power 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 maximize the effect of aberration correction, 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 serious astigmatism, which can affect the imaging quality of the optical lens 100.

[0044] Further, the fifth lens L5 and the sixth lens L6 are cemented, which is beneficial to further strengthen the effect of chromatic aberration elimination and spherical aberration correction of the optical lens 100. In some embodiments, the optical lens 100 satisfies the relationship: -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 of the front lens group of the optical lens 100 will not be too large, so that the optical lens 100 can not produce too serious aberration when obtaining light rays incident at a large angle. On the other hand, it is also beneficial to balance the aberration between the positive and negative lenses in the front lens group, so as to improve the resolution and the imaging quality.

[0045] In some embodiments, the optical lens 100 satisfies the relationship: 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 relationship, the face type of the image side S6 of the third lens L3 and the object side S7 of the fourth lens L4 can be reasonably configured, the deflection angle of the light rays after exiting from the third lens L3 and entering the fourth lens L4 can be reduced, the aberration can be effectively corrected, and the assembly yield of the optical lens 100 can be improved.

[0046] In some embodiments, the optical lens 100 satisfies the relationship: 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 relationship, the aperture of the image side S8 of the fourth lens L4 and the aperture size of the object side S9 of the fifth lens L5 can be reasonably configured, which is beneficial to the large-aperture characteristics of the optical lens 100. Thus, when the optical lens 100 is applied to a camera module, it can match a large-size photosensitive chip, thereby improving the imaging quality of the optical lens 100.

[0047] In some embodiments, the optical lens 100 satisfies a relationship: 1.4 < SD11 / ImgH < 1.55. Wherein, SD11 is half of the maximum effective aperture of the object side S1 of the first lens L1, and ImgH is the radius of the maximum effective imaging circle on the imaging surface IMG of the optical lens 100. Specifically, SD11 / ImgH can be 1.41, 1.43, 1.47, 1.49, 1.50, 1.51, 1.52, 1.53, or 1.54, etc. When the optical lens 100 satisfies the above relationship, the first lens L1 is matched with the half image height (i.e., half of the image height corresponding to the maximum field angle of the optical lens 100), so as to control the aperture of the first lens L1, so that the illumination, field angle and total optical length are balanced. If the upper limit or lower limit of the above relationship is exceeded, the maximum effective aperture of the first lens L1 is too large or too small, which will cause a large step between each lens and the imaging surface IMG, which is not conducive to the assembly of the optical lens 100 and the bearing design between each lens.

[0048] In some embodiments, the optical lens 100 satisfies a relationship: 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 S6 of the third lens L3 and the object side 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, or 1.75, etc. When the optical lens 100 satisfies the above relationship, the gap between the third lens L3 and the fourth lens L4 can be greatly compressed, so that the structure of the optical lens 100 is compact and the cooperation relationship is good. Further, through the above design, the light can be better guided to be deflected on the surface 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, thereby reducing the risk of generating stray light and ghost image; in addition, it is also conducive to reducing the difficulty of lens assembly manufacturing and assembly.

[0049] In some embodiments, the optical lens 100 satisfies a relationship: 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 from the maximum effective aperture of the object side S of the fourth lens L4 to the maximum effective aperture of the image side S of the fourth lens L4 in the direction of the optical axis O. Specifically, CT4 / ET4 can be 1.21, 1.25, 1.31, 1.36, 1.39, 1.41, 1.48, 1.48, or 1.49, etc. When the optical lens 100 satisfies the above relationship, the ratio of the center thickness and the edge thickness of the fourth lens L4 can be reasonably controlled, so as to reasonably control the overall thickness of the fourth lens L4, thereby avoiding the situation that the ratio of the center thickness and the edge thickness is too large, which is not conducive to processing and assembly.

[0050] In some embodiments, the optical lens 100 satisfies a relationship: 2 < ET6 / CT6 < 3. Wherein ET6 is a distance from a maximum effective aperture of the object side S11 of the sixth lens L6 to a maximum effective aperture of the image side S12 of the sixth lens L6 in the direction of the optical axis O, and CT6 is a 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 relationship, the sixth lens L6 satisfies that the edge thickness and the center thickness are within a reasonable range, the amount of surface shape change of the sixth lens L6 is small, the aberration existing in the optical lens 100 can be effectively controlled, and the processing on the process is also beneficial, thereby improving the production yield.

[0051] In some embodiments, the optical lens 100 satisfies a relationship: 1 < (CT6+CT7) / CT67 < 3. Wherein CT6 is a thickness of the sixth lens L6 on the optical axis O, CT7 is a thickness of the seventh lens L7 on the optical axis O, and CT67 is a distance from the image side S12 of the sixth lens L6 to the object side S13 of the seventh lens L7 on the optical axis O. 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 relationship, the thickness of the lens and the distance between the lenses of 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 are reasonably configured, which can effectively shorten the total optical length and reduce the volume of the optical lens 100, and is also beneficial to the processing and assembly of the lenses of the rear lens group. When the upper limit of the conditional expression is exceeded, the distance between the rear lens groups is too small, and the assembly is difficult; when the lower limit of the conditional expression is exceeded, the thickness of the lens on the optical axis O in the rear lens group is too small, which can easily lead to that the thickness of the lens on the optical axis O is too small, which cannot meet the production and processing requirements, and it is difficult to ensure the molding yield.

[0052] In some embodiments, the optical lens 100 satisfies a relationship: 5 < F7 / F < 7. Wherein F7 is an effective focal length of the seventh lens L7, and F is an 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 relationship, the positive refractive power of the seventh lens L7 of the optical lens 100 cannot become too strong, so that the angle between the normal of the object side S13 and the image side S14 of the seventh lens L7 and the incident light ray cannot become too large, which can further inhibit the occurrence of high-order aberration. When the upper limit or the lower limit of the above relationship is exceeded, it is not beneficial for the optical lens 100 to correct the aberration, thereby reducing the imaging quality.

[0053] In some embodiments, the optical lens 100 satisfies a relationship: 3 < R72 / R71 < 5. Wherein, 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 or 4.9, etc. By restricting the ratio of the radius of curvature of the object side surface S13 of the seventh lens L7 and 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 the image side surface S14 of the seventh lens L7 is more reasonable. When the seventh lens L7 satisfies the above relationship, the radius of curvature of the object side surface S13 of the seventh lens L7 is smaller than the radius of curvature of the image side surface S14 of the seventh lens L7, and the object side surface S13 of the seventh lens L7 is relatively more curved than the image side surface S14 of the seventh lens L7, so that the incident light rays maintain a small deflection angle, which is beneficial to correct the astigmatism generated by the front lens group (i.e. the first lens L1 to the sixth lens L6), and improve the imaging quality of the optical lens 100.

[0054] In some embodiments, the optical lens 100 satisfies a relationship: 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° or 129°, etc. When the optical lens 100 satisfies the above relationship, while realizing 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 size on the imaging surface IMG, so that the optical lens 100 has a suitable image size, and improves the brightness of the imaging surface IMG of the optical lens 100. When the upper limit of the condition is exceeded, the image height of the optical lens 100 is relatively small, which leads to a too small imaging size, and the imaging surface IMG of the optical lens 100 is difficult to be matched with the photosensitive chip, so that the relative illumination of the imaging surface IMG is greatly reduced, the brightness of the imaging surface IMG is relatively dark, and the phenomenon of dark corner is easily found in the photographed image, which reduces the imaging quality. When the lower limit of the condition is exceeded, the field of view angle of the optical lens 100 is relatively small, which leads to a reduced field of view range of the optical lens 100, which is not conducive to wide-angle.

[0055] In some embodiments, the optical lens 100 satisfies a relationship: 2 < F*tan(FOV / 2) / ImgH < 3.2. F is an effective focal length of the optical lens 100, FOV is a maximum field of view angle of the optical lens 100, and ImgH is a radius of a maximum 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 relationship, it can ensure that the aberration of the optical lens 100 can be corrected while the total optical length of the optical lens 100 is shortened, which helps to obtain an optical lens 100 with small size and good imaging quality. Meanwhile, the optical lens 100 can have large field of view and large imaging surface characteristics, so as to obtain more scene content and enrich the imaging information of the optical lens 100. When the upper limit of the above relationship is exceeded, the field of view angle of the optical lens 100 is too small, which reduces the field of view range of the optical lens 100, resulting in incomplete imaging information of the optical lens 100, 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 total optical length of the optical lens 100, resulting in the increase of the volume of the optical lens 100, which is not conducive to the design requirement of small size of the optical lens 100. When the lower limit of the above relationship is exceeded, the field of view angle of the optical lens 100 is too large, which causes the distortion of the outer field of view to be too large, resulting in the distortion of the image periphery, and reducing the imaging performance of the optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies a relationship: 85° < FOV / FNO < 95°. FOV is a maximum field of view angle of the optical lens 100, and FNO is an aperture 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 relationship, the field of view angle and the light flux of the optical lens 100 can be reasonably controlled, the distortion of the edge field of view can be improved, and the light flux of the optical lens 100 can be prevented from being too large. If the upper limit of the above relationship is exceeded, the field of view angle of the optical lens 100 is too large, which causes the distortion of the edge field of view to be too large, the image periphery appears distorted, and the aperture number is too small, which causes the light flux of the optical lens 100 to be too large, resulting in that the non-effective light also reaches the imaging surface IMG, which causes the imaging (especially at the edge field of view) to have aberrations such as spherical aberration and field curvature, and further causes the imaging performance of the optical lens 100 to be reduced. If the lower limit of the above relationship is exceeded, the aperture number of the optical lens 100 is relatively large, which causes the light flux of the optical lens 100 to be insufficient, and the clarity of the captured image is reduced.

[0057] In some embodiments, the optical lens 100 satisfies a relationship: 1.6 < FNO < 1.7. The FNO is the F-number of the optical lens 100. Specifically, the FNO can be 1.61, 1.62, 1.631, 1.641, 1.651, 1.661, 1.67, 1.681, or 1.691, etc. When the optical lens 100 satisfies the above relationship, the optical lens 100 has the characteristic of a large aperture, and the optical lens 100 has sufficient light quantity, which can make the image captured by the optical lens 100 clearer, so that the optical lens 100 can be suitable for shooting scenes with low light intensity such as high-quality night scenes, starry sky, etc. In addition, it can also avoid introducing excessive aberration, so that the optical lens 100 achieves overall balance.

[0058] In some embodiments, the optical lens 100 satisfies a 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 make the incident light rays with large angles smoothly enter the optical lens 100, and then the field of view angle range of the optical lens 100 is expanded, which ensures the imaging quality of the optical lens 100.

[0059] In some embodiments, the optical lens 100 satisfies a relationship: 5 < F3 / CT3 < 15. Wherein, F3 is the effective focal length of the third lens L3, and CT3 is the thickness of the third lens L3 on the optical axis O. Specifically, F3 / CT3 can be 5.1, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 14.9, etc. Since the first lens L1 and the second lens L2 both have negative refractive power, the third lens L3 with positive refractive power is beneficial to correct the edge aberration and improve 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 beneficial to reduce the thickness tolerance sensitivity of the third lens L3, reduce the processing difficulty of the third lens L3, improve the assembly yield of the optical lens 100, and further reduce the production cost. When the above relationship is satisfied, the thickness of the third lens L3 is appropriate, which is beneficial to reduce the thickness tolerance sensitivity of the third lens L3, reduce the processing difficulty of the third lens L3, improve the assembly yield of the optical lens 100, and further reduce the production cost. When exceeding the upper limit of the above relationship, the thickness of the third lens L3 is too small, which is not conducive to the processing of the third lens L3, and the thickness tolerance sensitivity of the third lens L3 is high, under the premise of meeting the optical performance. When lower than the lower limit of the above relationship, 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 a relationship: 3 < F4 / CT4 < 6. Wherein, F4 is the effective focal length of the fourth lens L4, and CT4 is the thickness of the fourth lens L4 on the optical axis O. Specifically, F4 / CT4 can be 3.1, 3.3, 3.5, 3.7, 4.0, 4.3, 4.5, 4.7, 5.0, 5.3, or 5.5, etc. When the optical lens 100 satisfies the above relationship, the fourth lens L4 can be reasonably configured, the deflection angle of the light 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 relationship, the thickness of the fourth lens L4 is too thin, resulting in too small edge light deflection angle, which is not conducive to correcting the aberration of the optical lens 100, thereby not conducive to improving the imaging quality of the optical lens 100; when lower than the lower limit of the above relationship, the focal length of the fourth lens L4 is too small, and the optical lens 100 provides too large positive refractive power, resulting in too large deflection angle of the light in the optical lens 100.

[0061] In some embodiments, the optical lens 100 satisfies a relationship: 10 < F5 / CT5 < 30. Wherein, F5 is the effective focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis O. Specifically, F5 / CT5 can be 11, 13, 15, 17, 20, 23, 25, 27, or 29, etc. When the optical lens 100 satisfies the above condition, the ratio of the effective focal length and the central thickness of the fifth lens L5 can be reasonably configured, so that the central thickness of the fifth lens L5 is not too thin or too thick, thereby facilitating the reduction of the tolerance sensitivity of the fifth lens L5, while enabling the fifth lens L5 to effectively correct the aberration generated by the deflection of the light by each lens on the object side, thereby improving the imaging resolving power of the optical lens 100. When the lower limit of the above relationship is not met, 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 the upper limit of the above relationship is exceeded, 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 a relationship: -30 < F6 / CT6 < -20. Wherein, F6 is the effective focal length of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis O. Specifically, F6 / CT6 can be -21, -22, -23, -24, -25, -26, -27, -28, or -29, etc. When the optical lens 100 satisfies the above condition, on the one hand, it can avoid the sixth lens L6 having an effective focal length that is too large to correct the astigmatism, thereby 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 conducive to the lightweight design of the optical lens 100, and also conducive to the molding and processing of the sixth lens L6.

[0063] In some embodiments, the optical lens 100 satisfies a relationship: 5 < F7 / CT7 < 15. F7 is an effective focal length of the seventh lens L7, and CT7 is a 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, or 14.9, etc. When the optical lens 100 satisfies the above condition, the tolerance sensitivity of the center thickness of the seventh lens L7 can be reduced, the processing difficulty of the seventh lens L7 is reduced, the assembly yield of the optical lens 100 is improved, the production cost is further reduced, and by satisfying the relationship, the effective focal length of the seventh lens L7 is avoided to be too large, and the astigmatism of the optical lens 100 is difficult to correct, thereby improving the imaging quality of the optical lens 100, and at the same time, the center thickness of the seventh lens L7 is avoided to be too large, which is beneficial to the miniaturization design of the optical lens 100. When the upper limit or the lower limit of the above relationship is exceeded, the tolerance sensitivity of the center thickness of the seventh lens L7 is high, the processing difficulty of the seventh lens L7 is increased, which is not conducive to improving the assembly yield of the optical lens 100, and further increases the production cost.

[0064] In some embodiments, the optical lens 100 satisfies a relationship: -2 < F1 / F < -1.5. F1 is an effective focal length of the first lens L1, and F is an 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, or -1.55, etc. When the optical lens 100 satisfies the above relationship, the ratio of the focal length of the first lens L1 and the focal length of the optical lens 100 can be reasonably configured, and for the entire optical lens 100, the refractive power of the first lens L1 will not be too strong, avoiding introducing too much spherical aberration, so that the optical lens 100 has good imaging quality.

[0065] In some embodiments, the optical lens 100 satisfies a relationship: -15 < F2 / F < -5. F2 is an effective focal length of the second lens L2, and F is an effective focal length of the optical lens 100. Specifically, F2 / F can be -14.5, -14, -13, -12, -11, -10, -9, -8, -7, -6, or -5.1, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to reduce the deflection angle of the light on the second lens L2, and at the same time, the negative refractive power provided by the second lens L2 can effectively balance the spherical aberration of the optical lens 100, effectively correct the aberration, thereby achieving good imaging quality, and at the same time, it is also beneficial to reasonably configure the center thickness of the second lens L2, thereby shortening the total length of the optical lens 100, and additionally, it is also beneficial to expand the field of view angle of the optical lens 100.

[0066] In some embodiments, the optical lens 100 satisfies a relationship: 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 limiting the relationship between the focal length of the third lens L3 and the effective focal length of the optical lens 100, the edge field aberration of the optical lens 100 can be corrected, the imaging resolution of the optical lens 100 is improved, and thus the imaging quality of the optical lens 100 is improved. When the upper limit of the above relationship is exceeded, the correction ability of the optical lens 100 to chromatic aberration and aberration is affected, and thus the imaging quality of the optical lens 100 is affected. When the lower limit of the condition is exceeded, the effective focal length of the optical lens 100 is too large, which causes the field angle of the optical lens 100 to be small, and the characteristics of large aperture and wide angle cannot be achieved.

[0067] In some embodiments, the optical lens 100 satisfies a relationship: 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 relationship, the fourth lens L4 provides a part of 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, the first lens L1, the second lens L2, and the third lens L3 form a quasi-Gaussian structure, which can balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3, avoid excessive refractive index to cause high-order aberration, and thus improve the imaging quality of the optical lens 100. When the lower limit of the condition is exceeded, the effective focal length of the optical lens 100 is too small, which is not conducive to meeting the long-focus telephoto characteristics. When the upper limit of the above relationship is exceeded, the focal length of the fourth lens L4 is too large, which is difficult to balance the distortion generated by the first lens L1, the second lens L2, and the third lens L3. The refractive index of the optical lens 100 is too large, which is easy to cause high-order aberration.

[0068] In some embodiments, the optical lens 100 satisfies a 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 exiting angle of the light rays after being folded by the lens group can be reduced, so that the incident angle of the light rays on the photosensitive chip on the image side of the optical lens 100 can be reduced, and thus the photosensitive performance of the photosensitive chip can be improved. When the upper limit of the above relationship is exceeded, the fifth lens L5 has too strong refractive power, which is prone to generate large marginal aberration and chromatic aberration, and is not conducive to improving the resolution performance of the optical lens 100; when the lower limit of the condition is lower, the refractive power of the fifth lens L5 is insufficient to reduce the exiting angle of the light rays, which is not conducive to improving the photosensitive performance of the photosensitive chip.

[0069] In some embodiments, the optical lens 100 satisfies a 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 limiting the relationship between the focal length of the sixth lens L6 and the effective focal length of the optical lens 100, the aberration of the optical lens 100 can be corrected, the temperature sensitivity of the optical lens 100 can be reduced, and thus the imaging quality of the optical lens 100 can be improved. When the upper limit of the above relationship is exceeded, the sixth lens L6 has too strong refractive power, 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 thus the imaging quality of the optical lens 100 can be reduced; when the lower limit of the condition is lower, the refractive power of the sixth lens L6 is too weak, 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, and the assembly sensitivity is increased.

[0070] In some embodiments, the optical lens 100 satisfies a relationship: 4 < R11 / R12 < 6. R11 is the curvature radius of the object side S1 of the first lens L1 at the optical axis O, and R12 is the curvature radius of the image side 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, the shape and bending degree of the first lens L1 can be controlled, so that the aberration introduction value of the incident light rays can be effectively reduced, the aberration balance of the optical lens 100 can be promoted, and the processing difficulty of the first lens L1 can be reduced, so as to facilitate the manufacturing of the first lens L1 and improve the processing process of the optical lens 100.

[0071] In some embodiments, the optical lens 100 satisfies the relationship: 0.5 < R21 / R22 < 0.7. Wherein, R21 is the radius of curvature of the image side S4 of the second lens L2 at the optical axis O, and R22 is the radius of curvature of the object side 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 relationship, by adjusting the radius of curvature of the second lens L2, the spherical aberration and the astigmatism of the optical lens 100 can be effectively corrected, while the sensitivity of the second lens L2 can be reduced, the influence of the field curvature of the optical lens 100 during focusing at different object distances can be reduced, and the imaging quality can be improved.

[0072] In some embodiments, the optical lens 100 satisfies the relationship: 0.04 < R31 / R32 < 0.5. Wherein, R31 is the radius of curvature of the image side S6 of the third lens L3 at the optical axis O, and R32 is the radius of curvature of the object side 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 relationship, in combination with the concave-convex surface type of the third lens L3, the radius of curvature and the surface type of the object side S5 and the image side S6 of the third lens L3 can be optimized, which is beneficial for the third lens L3 to reasonably cooperate with the negative refractive power of the first lens L1 and the negative refractive power of the second lens L2, thereby reducing the on-axis spherical aberration of the entire optical lens 100, and at the same time, it is beneficial to correct the light path direction of the third lens L3 to the fourth lens L4, thereby reducing the generation of optical distortion.

[0073] In some embodiments, the optical lens 100 satisfies the relationship: -0.5 < R41 / R42 < -0.2. Wherein, R41 is the radius of curvature of the image side S8 of the fourth lens L4 at the optical axis O, and R42 is the radius of curvature of the object side 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 relationship, 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 fourth lens L4 is avoided from being excessively curved, which is easy to be molded and manufactured.

[0074] In some embodiments, the optical lens 100 satisfies the relationship: -1.5 < R51 / R52 < -0.5, where R51 is the radius of curvature of the image side S10 of the fifth lens L5 at the optical axis O, and R52 is the radius of curvature 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 condition, the surface shape of the fifth lens L5 is reasonably controlled, the contribution of the astigmatism of the fifth lens L5 is effectively controlled, the imaging quality of the intermediate field is ensured, the aberration of the optical lens 100 is corrected, the balance of the distortion of the optical lens 100 is ensured, at the same time, the surface shape of the object side S9 and the image side S10 of the fifth lens L5 at the optical axis O is not too curved, which is beneficial to reduce the processing difficulty of the fifth lens L5 and improve the yield of the fifth lens L5.

[0075] In some embodiments, the optical lens 100 satisfies the relationship: 0 < R61 / R62 < -0.6, where R61 is the radius of curvature of the image side S12 of the sixth lens L6 at the optical axis O, and R62 is the radius of curvature 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 relationship, the radius of curvature of the object side S11 of the sixth lens L6 at the optical axis O and the radius of curvature 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 is not too curved, thereby correcting the astigmatism of the optical lens 100 while reducing the performance variation sensitivity of the optical lens 100, which is beneficial to improve the product yield.

[0076] The surface shape of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

[0077]

[0078] wherein Z is the distance from a corresponding point on the aspheric surface to a plane tangent to the vertex of the surface, r is the distance from any point on the aspheric surface to the optical axis, c is the curvature of the vertex of the aspheric surface, c = 1 / Y, Y is the radius of curvature (i.e., the near-axis curvature c is the inverse 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 aspheric surface formula.

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

[0080] First Embodiment

[0081] The first embodiment of the present application discloses a structural schematic diagram of the optical lens 100 as shown in the figure Figure 1 The optical lens 100 includes a first lens L1, a second lens L2, a diaphragm 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 protection glass CG arranged in sequence from the object side to the image side along the optical axis O.

[0082] Further, the first lens L1 has a negative refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, the sixth lens L6 has a negative refractive power, and the seventh lens L7 has a positive refractive power.

[0083] Further, the first lens L1 has a negative refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a positive refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, the sixth lens L6 has a negative refractive power, and the seventh lens L7 has a positive refractive power.

[0084] In particular, along the optical axis O of the optical lens 100, the elements are arranged in the order of the elements in Table 1a from top to bottom in sequence from the object side to the image side. In the same lens, the surface with the smaller surface serial number is the object side surface of the lens, and the surface with the larger surface serial number is the image side surface of the lens, such as the object side surface S1 and the image side surface S2 of the first lens L1 corresponding to the surface serial numbers 1 and 2 respectively. The Y radius in Table 1a is the radius of curvature of the object side surface or the image side surface with the corresponding surface serial number at the optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens at the optical axis O, and the second value is the distance from the image side surface of the lens to the vertex of the next surface at the optical axis O. The value in the "thickness" parameter column of the stop STO is the distance from the stop STO to the vertex of the next surface at the optical axis O, and the positive direction of the optical axis O is from the object side surface S1 of the first lens L1 to the image side surface of the last lens. When the value is negative, it indicates that the stop STO is arranged on the image side of the vertex of the next surface. If the thickness of the stop STO is positive, the stop STO is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, the thickness and the effective focal length in Table 1a are mm. The reference wavelength of the refractive index and the Abbe number of each lens in Table 1a is 587.56 nm, and the reference wavelength of the effective focal length is 546 nm.

[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, and Table 1b gives the conic constant k, the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces that can be used in the first embodiment.

[0086] Table 1a

[0087]

[0088] Table 1b

[0089]

[0090] Please refer to Figure 2 (A) in Figure 2 (A) in shows the longitudinal spherical aberration 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. Among them, the abscissa along the X axis represents the focal point offset, and the unit is mm. The ordinate along the Y axis represents the normalized field of view. As can be seen from (A) in 2, the spherical aberration value of the optical lens 100 in the first embodiment is better, which indicates that the imaging quality of the optical lens 100 in the embodiment is better.

[0091] Please refer to Figure 2 (B) in Figure 2(B) of FIG. 10 shows the astigmatism curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. In (B) of FIG. 10, the abscissa along the X-axis direction represents the focal shift, in units of mm, and the ordinate along the Y-axis direction represents the field angle, in units of deg. In the astigmatism curve, T represents the curvature of the imaging surface IMG in the subarc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. From (B) of FIG. 10, it can be seen that, at this wavelength, the astigmatism of the optical lens 100 is well compensated. Figure 2 (B) of FIG. 10 shows the astigmatism curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. In (B) of FIG. 10, the abscissa along the X-axis direction represents the focal shift, in units of mm, and the ordinate along the Y-axis direction represents the field angle, in units of deg. In the astigmatism curve, T represents the curvature of the imaging surface IMG in the subarc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. From (B) of FIG. 10, it can be seen that, at this wavelength, the astigmatism of the optical lens 100 is well compensated.

[0092] Please refer to (C) of FIG. 10, Figure 2 (C) of FIG. 10 shows the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. In (C) of FIG. 10, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the field angle, in units of deg. From (C) of FIG. 10, it can be seen that, at this wavelength, the distortion of the optical lens 100 is well corrected. Figure 2 (C) of FIG. 10 shows the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. In (C) of FIG. 10, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the field angle, in units of deg. From (C) of FIG. 10, it can be seen that, at this wavelength, the distortion of the optical lens 100 is well corrected. Figure 3 (C) of FIG. 10 shows the distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546 nm. In (C) of FIG. 10, the abscissa along the X-axis direction represents the distortion, and the ordinate along the Y-axis direction represents the field angle, in units of deg. From (C) of FIG. 10, it can be seen that, 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 in the second embodiment disclosed by the present application is shown in FIG. 11, which comprises, in order from the object side to the image side along the optical axis O, a first lens L1, a second lens L2, a diaphragm 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. Figure 4 Further, in the second embodiment, the refractive power and the surface shape of each lens are consistent with those of each lens in the first embodiment.

[0095] Further, in the second embodiment, the refractive power and the surface shape of each lens are consistent with those of each lens in the first embodiment.

[0096] In the second embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspheric surfaces. Table 2b shows the conic constant k, the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspheric surfaces that can be used in the second embodiment.

[0097] Table 2a

[0098]

[0099]

[0100] ​

[0101] Table 2b

[0102]

[0103] Please see Figure 4 ,Depend on Figure 4 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the second embodiment, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 4 (A) Figure 4 (B) and Figure 2 The wavelengths corresponding to each curve in (C) can be referred to in the first embodiment regarding... Figure 2 (A) in the middle Figure 2 (B) in the middle Figure 5 The content 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 this application is shown below. Figure 6 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture stop 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 sequentially from the object side to the image side along the optical axis O.

[0106] Furthermore, in the third embodiment, the refractive power and surface shape of each lens are consistent with those of each lens in the first embodiment.

[0107] Other parameters in the third embodiment are given in Table 3a below, and the definitions of each parameter can be derived from the description of the foregoing embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and effective focal length in Table 3a are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 3a is 587.56 nm, and the reference wavelength for the effective focal length is 546 nm.

[0108] In the third embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspherical. Table 3b gives the conic constant k, higher-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] Referring to Figure 6 , it can be seen from the (A) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion curve diagram in Figure 6 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 in the third embodiment are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), Figure 6 (B) and (C) in Figure 6 can refer to the descriptions about (A), Figure 2 (B) and (C) in the first embodiment, which will not be repeated here. Figure 2 Figure 2 Figure 7

[0114] Fourth Embodiment

[0115] The structural schematic diagram of the optical lens 100 disclosed by the fourth embodiment of the present application is shown in Figure 8 , which comprises, in order from the object side to the image side along the optical axis O, a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an optical filter IR and a protective glass CG.

[0116] Further, in the fourth embodiment, the refractive power and surface shape of each lens are consistent with those of the first embodiment.

[0117] Other parameters in the fourth embodiment are given in the following Table 4a, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, which will not be repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 4a are mm. In Table 4a, the reference wavelength of the refractive index and Abbe number of each lens is 587.56 nm, and the reference wavelength of the effective focal length is 546 nm.

[0118] In the fourth embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspheric surfaces, and the conic constant k, the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspheric surfaces that can be used in the fourth embodiment are given in Table 4b.

[0119] Table 4a

[0120]

[0121] Table 4b ​​​

[0122]

[0123] Please refer to Figure 8 , it can be seen from the (A) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion curve diagram in Figure 8 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 in the fourth embodiment are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A) of Figure 8 , (B) of Figure 8 and (C) of Figure 2 can refer to the descriptions of the wavelengths corresponding to the curves in (A) of Figure 2 , (B) of Figure 2 and (C) of Figure 9 of the first embodiment, which will not be described here.

[0124] Fifth Embodiment

[0125] The structural schematic diagram of the optical lens 100 disclosed by the fifth embodiment of the present application is shown in Figure 10 , which comprises, in order from the object side to the image side along the optical axis O, a first lens L1, a second lens L2, a stop STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an optical filter IR and a protective glass CG.

[0126] Further, in the fifth embodiment, the refractive power and surface shape of each lens are consistent with those of the first embodiment.

[0127] Other parameters in the fifth embodiment are given in the following Table 4a, and the definitions of the parameters can be obtained from the descriptions of the foregoing embodiments, which will not be described here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 4a are mm. In Table 5a, the reference wavelength of the refractive index and Abbe number of each lens is 587.56 nm, and the reference wavelength of the effective focal length is 546 nm.

[0128] In the fifth embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspheric surfaces, and the conic constant k, the high-order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspheric surfaces that can be used in the fifth embodiment are given in Table 5b.

[0129] Table 5a

[0130]

[0131] Table 5b

[0132]

[0133] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the fifth embodiment, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 2 The wavelengths corresponding to each curve in (C) can be referred to in the first embodiment regarding... Figure 2 (A) in the middle Figure 2 (B) in the middle Figure 11 The content 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 this application is shown below. Figure 12 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture stop 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 sequentially from the object side to the image side along the optical axis O.

[0136] Furthermore, in the sixth embodiment, the refractive power and surface shape of each lens are consistent with those of each lens in the first embodiment.

[0137] Other parameters in the sixth embodiment are given in Table 6a below, and the definitions of each parameter can be derived from the descriptions of the foregoing embodiments, and will not be repeated here. It is understood that the units for Y-radius, thickness, and effective focal length in Table 6a are all mm. Furthermore, the reference wavelength for the refractive index and Abbe number of each lens in Table 6a is 587.56 nm, and the reference wavelength for the effective focal length is 546 nm.

[0138] In the sixth embodiment, the object side surface S13 and the image side surface S14 of the seventh lens L7 are both aspherical. Table 6b gives the conic constant k, higher-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] Please see Figure 12 ,Depend on Figure 12 As can be seen from (A) the longitudinal spherical aberration diagram, (B) the astigmatism diagram, and (C) the distortion curve diagram, in the sixth embodiment, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are all well controlled, thus the optical lens 100 of this embodiment has good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12 (B) and Figure 2 The wavelengths corresponding to each curve in (C) can be referred to in the first embodiment regarding... Figure 2 (A) in the middle Figure 2 (B) in the middle Figure 13 The content described in (C) will not be repeated here.

[0145] Table 7 shows the 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 of the optical lenses 100 in the first to sixth embodiments. , 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] Please see Figure 14The embodiment of the present application also discloses a camera module 200, which comprises a photosensitive chip 201 and the optical lens 100. The photosensitive chip 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used for receiving light signals of an object and projecting the light signals to the photosensitive chip 201. The photosensitive chip 201 is used for converting the light signals corresponding to the object into image signals, which will not be described herein. The camera module 200 with the optical lens 100 can realize miniaturization design of the optical lens 100, and make the optical lens 100 have the characteristic of a large field of view, thereby improving the imaging quality of the optical lens 100.

[0150] Please refer to ​ The embodiment of the present application also discloses a terminal device 300, which comprises a housing 301 and the camera module 200. The camera module 200 is arranged on the housing 301. The terminal device 300 can be but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor and the like. It can be understood that the electronic device 300 with the camera module 200 has all the technical effects of the optical lens 100, that is, the camera module 200 can realize miniaturization design of the optical lens 100, and make the optical lens 100 have the characteristic 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 solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An optical lens characterized in that, There are seven lenses with refractive power, including in order from the object side to the image side along the optical axis: a first lens with negative refractive power, the object side surface of the first lens is convex at the near optical axis, and the image side surface of the first lens is concave at the near optical axis; a second lens with negative refractive power, the object side surface of the second lens is concave at the near optical axis, and the image side surface of the second lens is convex at the near optical axis; a third lens with positive refractive power, the object side surface of the third lens is convex at the near optical axis, and the image side surface of the third lens is concave at the near optical axis; a fourth lens with positive refractive power, the object side surface of the fourth lens is convex at the near optical axis, and the image side surface of the fourth lens is convex at the near optical axis; a fifth lens with positive refractive power, the object side surface of the fifth lens is convex at the near optical axis, and the image side surface of the fifth lens is convex at the near optical axis; a sixth lens with negative refractive power, the object side surface of the sixth lens is concave at the near optical axis, and the image side surface of the sixth lens is concave at the near optical axis; a seventh lens with positive refractive power, the object side surface of the seventh lens is convex at the near optical axis, and the image side surface of the seventh lens is concave at the near optical axis; The optical lens satisfies the following relationship: 140°≤FOV≤150°, 7.2<TTL / F<7.6, 5<F7 / F<7; wherein, FOV is the maximum field of view of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, F is the effective focal length of the optical lens, and F7 is the effective focal length of the seventh lens.

2. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: 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 of claim 1, wherein, The optical lens satisfies the following relationship: -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 from the object side surface of the second lens at the largest effective aperture to the intersection of the object side surface of the second lens and the optical axis in the direction of the optical axis, F2 is the effective focal length of the second lens, SAG12 is the distance from the image side surface of the first lens at the largest effective aperture to the intersection of the image side surface of the first lens and the optical axis in the direction of the optical axis, and SAG11 is the distance from the object side surface of the first lens at the largest effective aperture to the intersection of the object side surface of the first lens and the optical axis in the direction of the optical axis.

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

5. The optical lens of claim 1, wherein, The optical lens satisfies the following relationship: 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 of claim 1, wherein, The optical lens satisfies the following relationship: 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 between the image side of the third lens and the object side of the fourth lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, ET4 is the distance between the maximum effective aperture of the object side of the fourth lens and the maximum effective aperture of the image side of the fourth lens in the direction of the optical axis, ET6 is the distance between the maximum effective aperture of the object side of the sixth lens and the maximum effective aperture of the image side of the sixth lens in the direction of the optical axis, and CT6 is the thickness of the sixth lens on the optical axis.

7. The optical lens of claim 1, wherein, The optical lens satisfies the following conditional expression: 1 < (CT6+CT7) / CT67 < 3, 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 between the image side of the sixth lens and the object side of the seventh lens on the optical axis, R72 is the radius of curvature of the image side of the seventh lens at the optical axis, and R71 is the radius of curvature of the object side of the seventh lens at the optical axis.

8. The optical lens of claim 1, wherein, The optical lens satisfies the following conditional expression: 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 F-number of the optical lens.

9. An image capture module, comprising: The camera module comprises a photosensitive chip and the optical lens according to any one of claims 1-8, and the photosensitive chip is arranged on the image side of the optical lens.

10. A terminal device, comprising: The camera module according to claim 9 is arranged in the shell.

Images