Optical lens, camera module and terminal equipment

Abstract

An optical lens, a camera module and a terminal device are provided, the optical lens has six lenses with refractive power, the six lenses comprise a first lens to a sixth lens in sequence from an object side to an image side along an optical axis, the refractive power of the first lens is negative, negative, positive, negative, positive and negative, and the object side surface and the image side surface of the first lens are a convex surface and a concave surface near the optical axis respectively; the object-side surface and the image-side surface of the second lens element are respectively a concave surface and a convex surface near the optical axis; the object side surface and the image side surface of the third lens are convex surfaces near the optical axis; the fourth lens element has a convex object-side surface and a concave image-side surface in paraxial regions, respectively; the fifth lens element has an object-side surface and an image-side surface being convex in a paraxial region. The sixth lens element has a concave image-side surface in a paraxial region. The seventh lens element has a convex object-side surface and a concave image-side surface in paraxial regions, respectively. The optical lens satisfies the following relational expressions: 65 degree lt; a FOVlt; the angle is 75 degrees, and the tilt is 3.5 degrees; tTL / Hlt; 4.2. The optical lens provided by the invention can realize miniaturization and has the characteristic of a large field angle.

Description

Technical Field

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

[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 in-vehicle cameras has shown explosive growth. By means of front-view, rear-view, surround-view and other in-vehicle lenses mounted on vehicles, all-round information inside and outside the vehicle can be obtained, thereby helping drivers to make correct driving behaviors. Therefore, the adaptability of the lens to the environment and the imaging stability become the safety guarantee during the driving process of the vehicle.

[0003] The ADAS system has high requirements for the in-vehicle lenses it mounts. Firstly, it requires the in-vehicle lenses to have high imaging clarity to effectively distinguish the details of the road environment, and also requires the in-vehicle lenses 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 in-vehicle system, the volume of the in-vehicle lenses is required not to be too large. Summary of the Invention

[0004] In view of the above, it is necessary to propose an optical lens, a camera module, and a terminal device, which can achieve the miniaturized design of the optical lens while having a large field of view.

[0005] To achieve the above object, in a first aspect, this application discloses an optical lens, which has a total of six lenses with refractive power, and successively includes, 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, both the object side surface and the image side surface of the third lens are convex near the optical axis; a fourth lens with negative 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 concave near the optical axis; a fifth lens with positive refractive power, both the object side surface and the image side surface of the fifth lens are convex near the optical axis; a sixth lens with negative refractive power, the image side surface of the sixth lens is concave near the optical axis; the optical lens satisfies the following relational expressions: 65° < FOV < 75°, 3.5 < TTL / H < 4.2; where, FOV is the maximum field of view of the optical lens, TTL is the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, and H is the image height corresponding to the maximum field of view of the optical lens.

[0006] In the optical lens provided by the present application, the first lens with negative refractive power, when matched with the object side surface which is convex at the near optical axis and the image side surface which is concave at the near optical axis, can effectively control the effective aperture of the first lens of the optical lens, and at the same time enable the optical lens to have a larger light incident angle, which is conducive to achieving the wide-angle effect of the optical lens, and at the same time can better control the head aperture of the optical lens; the second lens with negative refractive power, when matched with the object side surface which is concave at the near optical axis and the image side surface which is convex at the near optical axis, can better converge the light incident at a large angle projected by the first lens, make the light enter smoothly, and can better reduce the field curvature and astigmatism of the optical lens; the third lens with positive refractive power, when matched with the object side surface which is convex at the near optical axis and the image side surface which is convex at the near optical axis, can be conducive to the convergence of light after passing through the third lens, which can The eccentricity sensitivity of the optical lens can be reduced, and the total optical length of the optical lens can also be reduced; the fourth lens with negative refractive power can be well bonded with the fifth lens with positive refractive power to form a bonded lens, which is beneficial to reducing the chromatic aberration of the optical lens and correcting the spherical aberration of the optical lens, and improving the resolution of the optical lens. In addition, the fourth lens with negative refractive power has a convex surface on the object side and a concave surface on the image side, which is beneficial for the light to be smoothly injected into the fifth lens, and the fifth lens with positive refractive power has a convex surface on the object side and a convex surface on the image side, which can be beneficial for the light to converge after passing through the fifth lens, and reduce the total optical length of the optical lens. The sixth lens with negative refractive power, with a concave surface design on the image side at the near optical axis, is beneficial for the light to be smoothly injected into the imaging surface, which can improve the relative illumination of the optical lens, and at the same time control the back focal length to achieve the image height required by the design. Therefore, the optical lens of the present application has wide-angle and good imaging quality.

[0007] When the FOV is between 65° and 75°, the optical lens has a larger field of view, which is conducive to the optical lens being able to obtain more scene content, thereby enriching the imaging information of the optical lens. When TTL / H is between 3.5 and 4.2, it can ensure that the optical lens has a sufficiently large image height, so that it can adapt to a larger image sensor and obtain higher imaging quality; in this way, when the optical lens is used in an assisted driving system, it can help the driver obtain a clearer image to obtain more accurate driving environment information; in addition, when the optical lens satisfies the above relationship, it can also limit the range of the total optical length, which helps the optical lens to obtain a smaller volume, thereby meeting the needs of miniaturized design.

[0008] In a second aspect, the present application discloses a camera module, the camera module comprising a photosensitive chip and the optical lens as described in the first aspect, the photosensitive chip being arranged on the image side of the optical lens. The camera module having the optical lens can realize a miniaturized design of the optical lens, while enabling the optical lens to have the characteristic of a large field of view.

[0009] In a third aspect, the present application discloses a terminal device, comprising a housing and a camera module as described in the second aspect, wherein the camera module is arranged in the housing. The electronic device having the camera module realizes a miniaturized design of an optical lens and enables the optical lens to have a large field of view. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

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

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

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

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

[0022] Fig.13It is a schematic diagram of the structure of the optical lens disclosed in the seventh embodiment of the present application.

[0023] Fig.14 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the seventh embodiment of the present application.

[0024] Fig.15 It is a schematic diagram of the structure of the optical lens disclosed in the eighth embodiment of the present application.

[0025] Fig.16 It is a longitudinal spherical aberration curve diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed in the eighth embodiment of the present application.

[0026] Fig.17 It is a structural schematic diagram of the camera module disclosed in this application.

[0027] Fig.18 It is a structural schematic diagram of the terminal device disclosed in this application. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] First, see Figure 1 The embodiment of the present application discloses an optical lens 100, which has six lenses with refractive power, which are the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 from the object side to the image side along the optical axis O. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1, and finally forms an image on the imaging surface IMG of the optical lens 100.

[0030] Furthermore, 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 negative refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0031] Furthermore, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is concave at the near optical axis O, and the image-side surface S4 of the second lens L2 is convex at the near optical axis O; the object-side surface S5 and the image-side surface S6 of the third lens L3 are both convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave at the near optical axis O; the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are both convex 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.

[0032] In the optical lens 100 provided in the present application, the first lens L1 with negative refractive power, in combination with the object-side surface S1 with a convex surface at the near optical axis O and the image-side surface S2 with a concave surface at the near optical axis O, can effectively control the effective aperture of the first lens L1 of the optical lens 100, and at the same time enable the optical lens 100 to have a larger incident angle of light, which is conducive to achieving the wide-angle effect of the optical lens 100, and at the same time can better control the head aperture of the optical lens 100; the second lens L2 with negative refractive power, in combination with the object-side surface S3 with a concave surface at the near optical axis O and the image-side surface S4 with a convex surface at the near optical axis O, can better converge the light incident at a large angle projected by the first lens L1, so that the light is smoothly incident, and the field curvature astigmatism of the optical lens 100 can be better reduced; the third lens L3 with positive refractive power, in combination with the object-side surface S5 with a convex surface at the near optical axis O and the image-side surface S6 with a convex surface at the near optical axis O, can be conducive to the convergence of light after passing through the third lens L3, which can The fourth lens L4 with negative refractive power can be well bonded with the fifth lens L5 with positive refractive power to form a bonded lens, which is beneficial to reducing the chromatic aberration of the optical lens 100 and correcting the spherical aberration of the optical lens 100, thereby improving the resolution of the optical lens 100. In addition, the fourth lens L4 with negative refractive power has a convex object-side surface S7 and a concave image-side surface S8, which is beneficial for the light to be smoothly incident on the fifth lens L5, while the fifth lens L5 with positive refractive power has a convex object-side surface S9 and a convex image-side surface S10, which is beneficial for the light to converge after passing through the fifth lens L5, thereby reducing the total optical length of the optical lens 100. The sixth lens L6 with negative refractive power, in combination with a concave image-side surface S12 at the near optical axis O, is beneficial for the light to be smoothly incident on the imaging surface, thereby improving the relative illumination of the optical lens 100, while controlling the back focal length to achieve the image height required by the design. Therefore, the optical lens 100 of the present application has a wide angle and good imaging quality at the same time.

[0033] In some embodiments, when the optical lens 100 is applied to electronic devices such as vehicle-mounted devices, driving recorders, or on automobiles, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can all be glass, so that the optical lens 100 has a good optical effect and can also reduce the influence of temperature on the above lenses. Of course, among the multiple lenses of the optical lens 100, some lenses can be made of glass, and some lenses can be made of plastic, so that while ensuring that the influence of temperature on the lens is reduced to achieve a better imaging effect, the processing cost of the lens and the weight of the lens can be reduced, thereby reducing the processing cost of the optical lens 100 and reducing the overall weight of the optical lens 100. In addition, it can be understood that when the optical lens 100 is applied to electronic devices such as smart phones and smart tablets, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 can be selected from plastic to reduce the overall weight of the optical lens 100.

[0034] In some embodiments, considering that the spherical lens has the characteristics of simple manufacturing process and low production cost, and can be convenient for flexible design of the lens surface shape, the imaging resolution capability of the optical lens 100 is improved. The aspherical lens can make the object side or image side of the lens have a more flexible design, so that the lens can well solve the undesirable phenomena such as unclear imaging, distorted vision or narrow field of view when the lens is small and thin, and the optical lens 100 can have good imaging quality without too many lenses, which is conducive to shortening the length of the optical lens 100. Based on this, the first lens L1, the fourth lens L4 and the fifth lens L5 can be spherical lenses, and the second lens L2, the third lens L3 and the sixth lens L6 can be aspherical lenses. In this way, through the combined design of spherical and aspherical surfaces, not only can the processability of each lens be improved, which is beneficial to the surface design, but also the object side or image side of the lens can have a more flexible design, so that each lens can solve the undesirable phenomena such as unclear imaging, distorted field of view or narrow field of view in a small size and thinner condition, and the optical lens 100 can have good imaging quality without too many lenses, which is beneficial to shorten the length of the optical lens 100. It can be understood that in other embodiments, the surfaces of each lens in the optical lens 100 can be all spherical, all aspherical or any combination of spherical and aspherical surfaces, which can be selected according to actual needs, so it is not specifically limited in this embodiment.

[0035] In some embodiments, the optical lens 100 further includes a stop STO, and the stop STO 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 disposing 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 made far from the imaging surface IMG, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization. It can be understood that in other embodiments, the stop STO can also be disposed between other lenses and adjusted according to actual situations, and this embodiment does not make specific limitations thereon.

[0036] In some embodiments, the optical lens 100 further includes an IR filter IR, and the IR filter IR is disposed between the fifth lens L5 and the sixth lens L6. Optionally, the IR filter IR can be an infrared cut-off filter to filter out infrared light and pass visible light, making the imaging more in line with the visual experience of the human eye, thereby improving the imaging quality. In some other embodiments, the IR filter IR can be an infrared band-pass filter to allow infrared light to pass through and reflect visible light to achieve infrared imaging of the optical lens 100, enabling the optical lens 100 to image in a low-light environment or special application scenarios and obtain better imaging quality. It can be understood that the IR filter IR can be made of plastic, or made of optical glass coating, or an IR filter IR of other materials, and can be selected according to actual needs, and this embodiment does not make specific limitations thereon.

[0037] In some embodiments, the optical lens 100 further includes a cover glass CG, and the cover glass CG is disposed between the sixth lens L6 and the imaging surface IMG of the optical lens 100, thereby being able to protect the photosensitive chip and prevent dust. The cover glass CG can be made of plastic, or made of optical glass coating, or a cover glass CG of other materials, and can be selected according to actual needs, and this embodiment does not make specific limitations thereon. It can be understood that the cover glass CG can be a part of the optical lens 100, or can be removed from the optical lens 100, but when the cover glass CG is removed, the overall optical length of the optical lens 100 remains unchanged.

[0038] In some embodiments, the optical lens 100 satisfies the relationship: 65° < FOV < 75°. Wherein, FOV is the maximum field of view angle of the optical lens 100. Further, 66° < FOV < 72°. Specifically, FOV can be 66.1°, 67°, 68°, 69°, 70°, 71° or 71.8°, etc. When the optical lens 100 satisfies the above relationship, the optical lens 100 has a larger field of view angle, which is beneficial for the optical lens 100 to obtain more scene content, and further enriches the imaging information of the optical lens 100.

[0039] In some embodiments, the optical lens 100 satisfies the relational expression: 3.5 < TTL / H < 4.2. Wherein, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and H is the image height corresponding to the maximum field of view angle of the optical lens 100. Specifically, TTL / H can be 3.51, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1 or 4.19, etc. When the optical lens 100 satisfies the above relational expression, it can ensure that the optical lens 100 has a sufficiently large image height, so that a larger image sensor can be adapted and higher imaging quality can be obtained; in this way, when the optical lens is used in an assisted driving system, it can help the driver obtain a clearer image to obtain more accurate driving environment information; in addition, when the optical lens satisfies the above relational expression, the range of the overall optical length can also be limited, which helps the optical lens 100 to obtain a smaller volume, thus meeting the requirements of miniaturized design.

[0040] In some embodiments, the optical lens 100 satisfies the relational expression: 4 < TTL / F < 5.5. Wherein, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface IMG of the optical lens 100 on the optical axis O, and F is the effective focal length of the optical lens 100. Further, 4.2 < TTL / F < 5.2. Specifically, TTL / F can be 4.1, 4.3, 4.5, 4.7, 4.9, 5.1, 5.3 or 5.4, etc. When the optical lens 100 satisfies the above relational expression, the ratio of the overall length of the optical lens 100 to the focal length of the optical lens 100 can be controlled within a reasonable range, so that not only can the miniaturization of the optical lens 100 be realized, but also it is beneficial to make the light converge better on the imaging surface IMG, thereby being beneficial to improving the imaging quality of the optical lens 100.

[0041] In some embodiments, the optical lens 100 satisfies the relationship: 40° < FOV / FNO < 45°. Wherein, FOV is the maximum field of view angle of the optical lens 100, and FNO is the f-number of the optical lens 100. Specifically, FOV / FNO can be 40.1°, 40.5°, 41°, 41.5°, 42.0°, 42.5°, 43°, 43.5°, 44° or 44.9°, etc. When the optical lens 100 satisfies the above relationship, it can reasonably control the field of view angle and the light passing amount of the optical lens 100, improve the distortion of the edge field of view, and prevent the light flux of the optical lens 100 from being too large. If it is higher than the upper limit of the above relationship, the field of view angle of the optical lens 100 is too large, resulting in excessive distortion of the edge field of view, and there will be a distortion phenomenon in the outer periphery of the image. In addition, it will also cause the f-number to be too small, so that the light passing amount of the optical lens 100 is too large, resulting in non-effective light rays reaching the imaging surface IMG together, resulting in aberrations such as spherical aberration and field curvature in the imaging (especially at the edge field of view), thereby reducing the imaging performance of the optical lens 100; if it is lower than the lower limit of the above relationship, it will cause the light passing amount of the optical lens 100 to be insufficient, and the clarity of the captured image will decrease.

[0042] In some embodiments, the optical lens 100 satisfies the relationship: 1.1 < H / F < 1.3. H is the image height corresponding to the maximum field of view angle of the optical lens 100, and F is the effective focal length of the optical lens 100. Specifically, H / F can be 1.11, 1.13, 1.15, 1.17, 1.19, 1.21, 1.27 or 1.29, etc. By reasonably configuring the ratio relationship between the image height and the focal length of the optical lens 100, it is beneficial for the optical lens 100 to maintain good optical performance, realize the characteristics of high pixels of the optical lens 100, capture the details of the object to be photographed well, have a high resolution, and at the same time, it is beneficial for the optical lens 100 to have a small principal ray exit angle, thereby reducing the risk of vignetting and distortion of the optical lens 100.

[0043] In some embodiments, the optical lens 100 satisfies the relational expression: 2 < (R12 - R21) / CT12 < 3. Herein, R12 is the curvature radius of the image side S2 of the first lens L1 at the optical axis O, R21 is the curvature radius of the object side S3 of the second lens L2 at the optical axis O, and CT12 is the distance between the image side S2 of the first lens L1 and the object side S3 of the second lens L2 on the optical axis O. Further, 2.1 < (R2 - R3) / CT12 < 2.8. Specifically, (R2 - R3) / CT12 can be 2.11, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7 or 2.79, etc. When the optical lens 100 satisfies the above relationship, it is beneficial to rationally configure the ratio of the curvature radius of the object side S3 of the second lens L2 at the optical axis O and the curvature radius of the image side S2 of the first lens L1 at the optical axis O to the distance between the image side S2 of the first lens L1 and the object side S3 of the second lens L2 on the optical axis O, enabling light to smoothly transition from the first lens L1 to the second lens L2, and enabling the optical lens 100 to obtain a larger field of view. At the same time, the reasonable spacing between the first lens L1 and the second lens L2 can not only reduce the risk of stray light ghost images, but also reduce the assembly difficulty of the lenses.

[0044] In some embodiments, the optical lens 100 satisfies the relational expression: -1.1 < R12 / R21 < -0.7. R12 is the curvature radius of the image side S2 of the first lens L1 at the optical axis O, and R21 is the curvature radius of the object side S3 of the second lens L2 at the optical axis O. Specifically, R12 / R21 can be -1.01, -0.95, -0.91, -0.85, -0.8, -0.75, -0.7 or -0.69, etc. When the optical lens 100 satisfies the above relationship, the surface shapes of the image side S3 of the first lens L1 and the object side S4 of the second lens L2 can be made similar, thereby avoiding excessive deflection of light when passing through the image side S3 of the first lens L1 and the object side S4 of the second lens L2. At the same time, it can also reduce the sensitivity of the photosensitive chip and improve the imaging quality of the photosensitive chip.

[0045] In some embodiments, the optical lens 100 satisfies the relational expression: F2 / CT2 > -20. Herein, 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 -19.9, -17, -15, -13, -11, -9, -7 or -6, etc. When the optical lens 100 satisfies the above relational expression, by rationally 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, improving the imaging quality. When exceeding the range of the above relational expression, the effective focal length of the second lens L2 is too small, resulting in too strong refractive power of the second lens L2, and thus large aberration is likely to occur.

[0046] In some embodiments, the optical lens 100 satisfies the relation: 1 < F3 / F < 2. Wherein, F3 is the effective focal length of the third lens L3, and F is the effective focal length of the optical lens 100. Specifically, F3 / F can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 or 1.9, etc. By defining the relationship between the focal length of the third lens L3 and the effective focal length of the optical lens 100, the marginal field aberration of the optical lens 100 can be corrected, the imaging resolution of the optical lens 100 can be improved, and thus the imaging quality of the optical lens 100 can be improved. When exceeding the upper limit of the above relation, the refractive power of the third lens L3 is relatively too weak, the light converging ability becomes poor, resulting in large light deflection, which will affect the correction ability of the optical lens 100 for chromatic aberration and aberration, and thus affect the imaging quality of the optical lens 100; when lower than the lower limit of the conditional formula, the effective focal length of the optical lens 100 will be too large, resulting in a smaller field of view angle of the optical lens 100, and the characteristics of large aperture and wide angle cannot be achieved.

[0047] In some embodiments, the optical lens 100 satisfies the relation: 0.85 < SD21 / SD22 < 0.95. Wherein, SD21 is the maximum effective aperture of the object side surface S of the second lens L2, and SD22 is the maximum effective aperture of the image side surface S4 of the second lens L2. Specifically, SD21 / SD22 can be 0.851, 0.86, 0.87, 0.88, 0.9, 0.91, 0.93 or 0.94, etc. By reasonably controlling the difference between the aperture of the object side surface S3 and the aperture of the image side surface S4 of the second lens L2 within a certain range, the marginal field light can be made smoother, and the relative brightness of the optical lens 100 can be improved.

[0048] In some embodiments, the optical lens 100 satisfies the relation: 1.4 < SD11 / H < 1.8. Wherein, SD11 is the maximum effective aperture of the object side surface S1 of the first lens L1, and H is the image height corresponding to the maximum field of view angle of the optical lens 100. Specifically, SD11 / H can be 1.41, 1.45, 1.5, 1.55, 1.60, 1.65, 1.72 or 1.79, etc. When the optical lens 100 satisfies the above relation, it can ensure that the effective aperture of the first lens L1 and the image height of the optical lens 100 are within a suitable range, so as to control the aperture of the first lens L1, so that the illuminance, field of view angle and overall optical length reach balance. When exceeding the range of this relation, the aperture of the first lens L1 or the image height of the optical lens 100 exceeds the range defined by the relation, making the overall size of the optical lens 100 too large or the imaging quality poor.

[0049] In some embodiments, the optical lens 100 satisfies the relation: 1.4 < SD11 / SD12 < 2. Wherein, SD11 is the maximum effective aperture of the object side S1 of the first lens L1, and SD12 is the maximum effective aperture of the image side S2 of the first lens L1. Specifically, SD11 / SD12 can be 1.41, 1.45, 1.5, 1.55, 1.6, 1.7, 1.8, 1.9, etc. When the optical lens 100 satisfies the above relation, the difference in the aperture sizes of the object side S1 and the image side S2 of the first lens L1 can be reduced, ensuring that the aperture of the object side S1 of the first lens L1 is not too large, and reducing the sensitivity of the optical lens 100. More importantly, by controlling the ratio of SD11 and SD12 within the above range, the aperture of the object side S1 of the first lens L1 can be better restricted, and thus the head aperture with the optical lens 100 is smaller, realizing the miniaturization of the optical lens 100.

[0050] In some embodiments, the optical lens 100 satisfies the relation: 0.9 < CT1 / CT2 < 2. Wherein, CT1 is the thickness of the first lens L1 on the optical axis O, and CT2 is the thickness of the second lens L2 on the optical axis O. Specifically, CT1 / CT2 can be 0.901, 1.0, 1.1, 1.3, 1.5, 1.7, 1.9, 1.99, etc. When the optical lens 100 satisfies the above relation, the relationship between the refractive powers of the first lens L1 and the second lens L2 can be effectively adjusted, which is beneficial to the realization of wide-angle and miniaturization of the optical lens 100. At the same time, the angle of light exiting the optical lens 100 is reduced, so as to better match the photosensitive chip and improve the optical performance.

[0051] In some embodiments, the optical lens 100 satisfies the relation: CT3 / CT34 < 4. 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. Further, 0.3 < CT3 / CT34 < 3.5. Specifically, CT3 / CT34 can be 0.301, 1, 1.5, 2, 2.5, 3, 0.349, etc. By reasonably limiting the distance of the third lens L3 on the optical axis O and 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, the gap between the third lens L3 and the fourth lens L4 can be greatly compressed, which is beneficial to shortening the total length of the optical lens 100 and is beneficial to the miniaturization of the optical lens 100.

[0052] In some embodiments, the optical lens 100 satisfies the relationship: 1 < F2 / F1 < 6. Wherein, F1 is the effective focal length of the first lens L1, and F2 is the effective focal length of the second lens L2. Specifically, F2 / F1 can be 1.1, 1.5, 2, 2.5, 3, 3.5, 4 or 5.9, etc. By reasonably controlling the ratio of the focal lengths of the second lens L2 and the first lens L1, it is beneficial to achieve the effects of a large aperture and a large image plane of the optical lens 100, and have an appropriate refractive power to fully contract the light beam, thereby being beneficial to improving the image quality of the optical lens 100.

[0053] In some embodiments, the optical lens 100 satisfies the relationship: 1 < CT5 / CT4 < 8. Wherein, CT5 is the thickness of the fifth lens L5 on the optical axis O, and CT4 is the thickness of the fourth lens L4 on the optical axis O. Specifically, CT5 / CT4 can be 1.1, 2, 3, 4, 5, 6, 7.5 or 7.9, etc. When the optical lens 100 satisfies the above relationship, it is possible to reasonably control the ratio of the thicknesses of the fifth lens L5 and the fourth lens L4 on the optical axis O, thereby reasonably controlling their thicknesses, facilitating their reasonable arrangement on the optical axis O, and at the same time being able to balance aberrations, which is further beneficial to improving the imaging quality of the optical lens 100.

[0054] In some embodiments, the optical lens 100 satisfies the relationship: 0.5 < ET5 / ET4 < 2.5. Wherein, ET5 is the distance in the direction of the optical axis O from the maximum effective aperture of the object side S9 of the fifth lens L5 to the maximum effective aperture of the image side S10 of the fifth lens L5, and ET4 is the distance in the direction of the optical axis O from the maximum effective aperture of the object side S7 of the fourth lens L4 to the maximum effective aperture of the image side S8 of the fourth lens L4. Specifically, ET5 / ET4 can be 0.6, 0.8, 1.0, 1.3, 1.6, 1.9, 2.1 or 2.4, etc. When the optical lens 100 satisfies the above relationship, it is possible to reasonably control the ratio of the edge thicknesses of the fifth lens L5 and the fourth lens L4, so that the edge thicknesses of the fifth lens L5 and the fourth lens L4 are reasonable, which is further convenient for their cementing.

[0055] In some embodiments, the optical lens 100 satisfies the relationship: VD4 < 21. Wherein, VD4 is the Abbe number of the fourth lens L4. Specifically, VD4 can be 19.0, 19.3, 19.65, 19.95, 20.0 or 20.9, etc. When the optical lens 100 satisfies the above relationship, it is possible to reasonably configure the material of the fourth lens L4, so that the fourth lens L4 can effectively correct the chromatic aberration of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0056] In some embodiments, the optical lens 100 satisfies the relation: VD5>65. Wherein, VD5 is the Abbe number of the fifth lens L5. Specifically, VD5 can be 75, 73, 71, 70, 72, 74, 68, 66, etc. When the optical lens 100 satisfies the above relation, the material of the fifth lens L5 can be reasonably configured, so that the fifth lens L5 can effectively correct the chromatic aberration of the optical lens 100 and improve the imaging quality of the optical lens 100.

[0057] In some embodiments, the fourth lens L4 and the fifth lens L5 are cemented, which is beneficial to further enhance the effect of chromatic aberration elimination and spherical aberration correction of the optical lens 100.

[0058] In some embodiments, the optical lens 100 satisfies the relation: 1.1<R11 / (R12+CT1)<1.6. Wherein, R11 is the curvature radius of the object side surface S1 of the first lens L1 at the optical axis O, R12 is the curvature radius of the image side surface S2 of the first lens L1 at the optical axis O, and CT1 is the thickness of the first lens L1 on the optical axis O. Specifically, R11 / (R12+CT1) can be 1.101, 1.2, 1.3, 1.4, 1.5, 1.599, etc. When the optical lens 100 satisfies the above relation and the ratio of the above three is within the above range, it can ensure that the first lens L1 has high stability. Its object side surface S1 can not only obtain a larger light entrance amount and light entrance range, but also make the light transition to the next lens more smoothly, thereby ensuring that the optical lens 100 has a small optical distortion.

[0059] In some embodiments, the optical lens 100 satisfies the relation: 0.75<R22 / (R21-CT2)<1.2. Wherein, R22 is the curvature radius of the image side surface S4 of the second lens L2 at the optical axis O, R21 is the curvature radius of the object side surface S3 of the second lens L2 at the optical axis O, and CT2 is the thickness of the second lens L2 on the optical axis O. Specifically, R22 / (R21-CT2) can be 0.751, 0.8, 0.85, 0.9, 0.95, 1, 1.19, etc. When the optical lens 100 satisfies the above relation, it is beneficial to reasonably configure the thickness of the second lens L2 on the optical axis O and the curvature radii of the object side surface S3 and the image side surface S4 of the second lens L2, improve the manufacturing yield of the second lens L2, and at the same time, it is also beneficial to correct the aberration and improve the imaging quality of the optical lens 100.

[0060] In some embodiments, the optical lens 100 satisfies the relation: 1.4 < (R11 - R22) / CT14 < 2.2. Herein, R11 is the curvature radius of the object side surface S1 of the first lens L1 at the optical axis O, R22 is the curvature radius of the image side surface S4 of the second lens L2 at the optical axis O, and CT14 is the distance from the intersection of the object side surface S1 of the first lens L1 and the optical axis O to the intersection of the image side surface S8 of the fourth lens L4 and the optical axis O. Specifically, (R11 - R22) / CT14 can be 1.41, 1.7, 1.6, 1.8, 1.5, 1.9, 2, 2.19, etc. When the optical lens 100 satisfies the above relation, the gap between the first lens L1 and the fourth lens L4 can be greatly compressed. Meanwhile, it is beneficial to correct aberrations and improve the imaging quality of the optical lens 100.

[0061] In some embodiments, the optical lens 100 satisfies the relation: 48° < FOV*F / H < 65°. 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 H is the image height corresponding to the maximum field of view angle of the optical lens 100. Specifically, FOV*F / H can be 48.1°, 50°, 53°, 56°, 59°, 61°, 63°, 64.9°, etc. When the optical lens 100 satisfies the above relation, it is beneficial to achieve the effect of a large image height, facilitate the matching of the photosensitive chip, and improve the image plane brightness of the optical lens 100. When exceeding the upper limit of the above relation, the maximum image height of the optical lens 100 becomes smaller, resulting in a reduction in the field of view range of the optical lens 100, which is not conducive to achieving the effect of a large image height; when lower than the lower limit of the above relation, the field of view angle of the optical lens 100 becomes smaller, failing to reach the field of view angle required for the front view and main field of view cameras, which is not conducive to achieving the wide-angle characteristic of the optical lens 100.

[0062] In some embodiments, the optical lens 100 satisfies the relation: -7 < F6 / F5 < -3. Herein, F6 is the effective focal length of the sixth lens L6, and F5 is the effective focal length of the fifth lens L5. Specifically, F6 / F5 can be -6.9, -6, -5.5, -5, -4.5, -4, -3.5, -2.9, etc. By reasonably controlling the ratio of the focal length of the sixth lens L6 to the focal length of the fifth lens L5, it is beneficial to reasonably distribute the refractive powers of the fifth lens L5 and the sixth lens L6, beneficial to the balance of aberrations, and thus beneficial to improving the imaging quality of the optical lens 100.

[0063] In some embodiments, the optical lens 100 satisfies the relation: FNO < 1.8. Here, FNO is the f-number of the optical lens 100. Further, 1.5 < FNO < 1.7. Specifically, FNO can be 1.79, 1.71, 1.6, 1.51, etc. When the optical lens 100 satisfies the above relation, it has the characteristic of a large aperture. The optical lens 100 has sufficient light input, enabling the images captured by the optical lens 100 to be clearer, so that it can be applicable to object space scenes with low light brightness such as shooting high-quality night scenes and starry skies. In addition, it can also avoid introducing excessive aberrations, making the optical lens 100 achieve an overall balance.

[0064] In some embodiments, the optical lens 100 satisfies the relations: -3 < F1 / F < -1; F2 / F > -15; -2 < F4 / F < -1; F6 / F > -10. Here, F1 is the effective focal length of the first lens L1, F2 is the effective focal length of the second lens L2, F4 is the effective focal length of the fourth lens L4, F6 is the effective focal length of the sixth lens L6, and F is the effective focal length of the optical lens 100. Specifically, F1 / F can be -2.9, -2.5, -2, -1.5, -1.1, etc.; F2 / F can be -14.9, -11, -9, -7, -6, -5, -4, or -3, etc.; F4 / F can be -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.2, or -1.1, etc.; F6 / F can be -9.9, -9, -8, -7, -6, -5, -4, or -3, etc. By reasonably configuring the ratios of the focal lengths of the first lens L1, the second lens L2, the effective focal length of the fourth lens L4, and the focal length of the sixth lens L6 to the focal length of the optical lens 100, excessive spherical aberration can be avoided and aberrations can be effectively corrected, thereby improving the imaging quality of the optical lens 100.

[0065] In some embodiments, the optical lens 100 satisfies the relation: -6 < F1 / CT1 < -2. 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 -5.9, -5.5, -5, -4.5, -4, -3.5, -3, or -2.1, 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 enable the incident light rays entering the optical lens 100 at large angles to enter smoothly, thereby expanding the field of view angle range of the optical lens 100 and ensuring the imaging quality of the optical lens 100.

[0066] In some embodiments, the optical lens 100 satisfies the relation: F3 / CT3 < 15. 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 14.9, 11, 9, 7, 5, 4, 3, or 2, etc. Since both the first lens L1 and the second lens L2 have negative refractive powers, therefore, setting a third lens L3 with positive refractive power is beneficial for correcting marginal aberration and improving the imaging resolution of the optical lens 100. Limiting the ratio of the focal length of the third lens L3 to the thickness of the third lens L3 within a certain range is beneficial for reducing the thickness tolerance sensitivity of the third lens L3, reducing the processing difficulty of the third lens L3, improving the assembly qualification rate of the optical lens 100, and further reducing the production cost.

[0067] In some embodiments, the optical lens 100 satisfies the relation: F4 / CT4 > -15. 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 -14.9, -13, -11, -9, -7, -5, or -3, etc. When the optical lens 100 satisfies the above relation, it is possible to reasonably configure the fourth lens L4, effectively control the deflection angle of the light rays in the optical lens 100, and thereby reduce the sensitivity of the optical lens 100 and improve the resolution.

[0068] In some embodiments, the optical lens 100 satisfies the relation: 1 < F5 / CT5 < 2. F5 is the effective focal length of the fifth lens L5, and CT5 is the thickness of the fifth lens L5 on the optical axis O. Specifically, F5 / CT5 can be 1.01, 1.1, 1.3, 1.5, 1.7, or 1.9, etc. When the optical lens 100 satisfies the above conditional expression, it is possible to reasonably configure the ratio of the effective focal length to the central thickness of the fifth lens L5, so that the central thickness of the fifth lens L5 is neither too thin nor too thick, which is beneficial for reducing the tolerance sensitivity of the fifth lens L5, and at the same time enabling the fifth lens L5 to effectively correct the aberration generated by the refracted light rays of each lens on the object side, and improving the imaging analysis ability of the optical lens 100.

[0069] In some embodiments, the optical lens 100 satisfies the relational expression: -25 < F6 / CT6 < -5. Herein, F6 is the effective focal length of the sixth lens L6, and CT6 is the thickness of the sixth lens L6 on the optical axis O. Specifically, F6 / CT6 can be -24.9, -20, -16, -12, -8, -7, or -5.1, etc. When the optical lens 100 satisfies the above conditional expression, on the one hand, it is possible to avoid the astigmatism that is difficult to correct due to the too large effective focal length of the sixth lens L6, thereby improving the imaging quality of the optical lens 100; on the other hand, it is also possible to better control the central thickness of the sixth lens L6 within a reasonable range, which is beneficial to both the lightweight design of the optical lens 100 and the molding and processing of the sixth lens L6.

[0070] In some embodiments, the optical lens 100 satisfies the relational expressions: 2 < R11 / R12 < 3; 1 < R22 / R21 < 2; -3 < R32 / R31 < -1; 1 < R41 / R42 < 3; -3 < R52 / R51 < -1; |R61 / R62| < 30. Herein, R11 is the radius of curvature of the object side surface S1 of the first lens L1 at the optical axis O, R12 is the radius of curvature of the image side surface S2 of the first lens L1 at the optical axis O, R21 is the radius of curvature of the object side surface S3 of the second lens L2 at the optical axis O, R22 is the radius of curvature of the image side surface S4 of the second lens L2 at the optical axis O, R32 is the radius of curvature of the image side surface S6 of the third lens L3 at the optical axis O, R31 is the radius of curvature of the object side surface S5 of the third lens L3 at the optical axis O, R41 is the radius of curvature of the object side surface S7 of the fourth lens L4 at the optical axis O, R42 is the radius of curvature of the image side surface S8 of the fourth lens L4 at the optical axis O, R52 is the radius of curvature of the image side surface S10 of the fifth lens L5 at the optical axis O, R51 is the radius of curvature of the object side surface S9 of the fifth lens L5 at the optical axis O, R61 is the radius of curvature of the object side surface S11 of the sixth lens L6 at the optical axis O, and R62 is the radius of curvature of the image side surface S12 of the sixth lens L6 at the optical axis O. Specifically, R11 / R12 can be 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.75, 2.9, etc.; R22 / R21 can be 1.1, 1.3, 1.5, 1.7, 1.9, etc.; R32 / R31 can be -2.9, -2.5, -2, -1.5, -1.3, -1.1, etc.; R41 / R42 can be 1.1, 1.3, 1.6, 1.9, 2, 2.3, 2.5, 2.9, etc.; R52 / R51 can be -2.9, -2.6, -2.3, -2.1, -1.90, -1.5, -1.1, etc.; |R61 / R62| can be 2.0, 4, 8, 10, 15, 20, 25, 29, etc. By reasonably configuring the radii of curvature of the object side surfaces and image side surfaces of the first lens L1 to the sixth lens L6, the refractive power configuration of each lens of the optical lens 100 in the direction perpendicular to the optical axis O can be made uniform, the distortion and aberration generated by the front lens can be greatly corrected, and the sensitivity of the performance change of the optical lens 100 can also be reduced, which is beneficial to improving the product yield.

[0071] The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formulas:

[0072]

[0073] Among them, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, r is the distance from any point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, c = 1 / Y, Y is the radius of curvature (that is, the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the cone constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula.

[0074] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0075] First embodiment

[0076] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figure 1 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0077] Furthermore, 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 negative refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0078] Furthermore, the object-side surface S1 of the first lens L1 is convex at the near optical axis O, and the image-side surface S2 of the first lens L1 is concave at the near optical axis O; the object-side surface S3 of the second lens L2 is concave at the near optical axis O, and the image-side surface S4 of the second lens L2 is convex at the near optical axis O; the object-side surface S5 of the third lens L3 is convex at the near optical axis O, and the image-side surface S6 of the third lens L3 is convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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.

[0079] Specifically, the elements from the object side to the image side along the optical axis O of the optical lens 100 are arranged in sequence from top to bottom in Table 1a. In the same lens, the surface with a smaller surface number is the object side of the lens, and the surface with a larger surface number is the image side of the lens, such as surface numbers 1 and 2 correspond to the object side surface S1 and image side surface S2 of the first lens L1, respectively. The Y radius in Table 1a is the radius of curvature of the object side surface or image side surface of the corresponding surface number at the optical axis O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis O. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side S1 of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O. When the value is negative, it indicates that the aperture STO is set on the image side of the vertex of the next surface. If the thickness of the aperture STO is a positive value, the aperture STO is on the object side of the vertex of the next surface. It can be understood that the units of the Y radius, thickness and effective focal length in Table 1a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 1a is 588nm.

[0080] In the first embodiment, the object side surfaces and the image side surfaces of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 1b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the first embodiment.

[0081] Table 1a

[0082]

[0083]

[0084] Table 1b

[0085]

[0086] See also Figure 2 In (A), Figure 2 (A) in FIG. 2 shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 588 nm, 656 nm and 486 nm, respectively. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. It can be seen from (A) in FIG. 2 that the spherical aberration value of the optical lens 100 in the first embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better. Please refer to Figure 2 In (B), Figure 2(B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 588 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism diagram represents the curvature of the imaging surface IMG in the sub-arc direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. Figure 2 As can be seen from (B) in FIG. 1 , at this wavelength, the astigmatism of the optical lens 100 is well compensated. Figure 2 (C) in Figure 2 (C) in FIG. 1 shows a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 588 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the field of view angle, in degrees. Figure 2 As can be seen from (C) in FIG. 1 , at this wavelength, the distortion of the optical lens 100 is well corrected.

[0087] Second embodiment

[0088] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0089] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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 convex 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.

[0090] The other parameters in the second embodiment are given in the following Table 2a, and the definitions of the parameters can be obtained from the description of the above-mentioned embodiment, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 2a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 2a is 588nm.

[0091] In the second embodiment, the object side surfaces and the image side surfaces of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 2b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the second embodiment.

[0092] Table 2a

[0093]

[0094] Table 2b

[0095]

[0096] See also Figure 4 ,Depend on Figure 4 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the second embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 Middle (B) and Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0097] Third embodiment

[0098] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0099] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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 convex 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.

[0100] The other parameters in the third embodiment are given in the following Table 3a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 3a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 3a is 588nm.

[0101] In the third embodiment, the object side surfaces and the image side surfaces of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 3b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the third embodiment.

[0102] Table 3a

[0103]

[0104] Table 3b

[0105]

[0106]

[0107] See also Figure 6 ,Depend on Figure 6 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the third embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 Middle (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2The contents described in (C) will not be repeated here.

[0108] Fourth embodiment

[0109] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0110] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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 convex 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.

[0111] The other parameters in the fourth embodiment are given in the following Table 4a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 4a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 4a is 588nm.

[0112] In the fourth embodiment, the object-side surface and the image-side surface of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 4b shows the cone constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the fourth embodiment.

[0113] Table 4a

[0114]

[0115]

[0116] Table 4b

[0117]

[0118] See also Figure 8 ,Depend on Figure 8 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fourth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 Middle (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0119] Fifth embodiment

[0120] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0121] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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.

[0122] The other parameters in the fifth embodiment are given in the following Table 4a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 4a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 5a is 588nm.

[0123] In the fifth embodiment, the object side surfaces and the image side surfaces of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 5b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the fifth embodiment.

[0124] Table 5a

[0125]

[0126]

[0127] Table 5b

[0128]

[0129] See also Fig.10 ,Depend on Fig.10 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the fifth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 Middle (B) and Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0130] Sixth embodiment

[0131] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a filter IR, a sixth lens L6 and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0132] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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 convex 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. .

[0133] The other parameters in the sixth embodiment are given in the following Table 6a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 6a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 6a is 588nm.

[0134] In the sixth embodiment, the object side surfaces and the image side surfaces of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 6b shows the cone constant k, and the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the sixth embodiment.

[0135] Table 6a

[0136]

[0137] Table 6b

[0138]

[0139] See also Fig.12 ,Depend on Fig.12 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the sixth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.12 (A) Fig.12 Middle (B) and Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0140] Seventh embodiment

[0141] The structural schematic diagram of the optical lens 100 disclosed in the seventh embodiment of the present application is as follows Fig.13 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a filter IR, a sixth lens L6 and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0142] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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 convex 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.

[0143] The other parameters in the seventh embodiment are given in the following Table 7a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 7a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 7a is 588nm.

[0144] In the seventh embodiment, the object side surface and the image side surface of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 7b shows the cone constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the sixth embodiment.

[0145] Table 7a

[0146]

[0147] Table 7b

[0148]

[0149]

[0150] See also Fig.14 ,Depend on Fig.14It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the seventh embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.14 (A) Fig.14 Middle (B) and Fig.14 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0151] Eighth embodiment

[0152] The structural schematic diagram of the optical lens 100 disclosed in the eighth embodiment of the present application is as follows Fig.15 As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture STO, a third lens L3, a fourth lens L4, a fifth lens L5, a filter IR, a sixth lens L6 and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis O.

[0153] 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 convex at the near optical axis O; the object-side surface S7 of the fourth lens L4 is convex at the near optical axis O, and the image-side surface S8 of the fourth lens L4 is concave 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.

[0154] The other parameters in the eighth embodiment are given in the following Table 8a, and the definitions of the parameters can be obtained from the description of the above embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness and effective focal length in Table 8a are all mm. And the reference wavelength of the refractive index, Abbe number and effective focal length of each lens in Table 8a is 588nm.

[0155] In the eighth embodiment, the object-side surface and the image-side surface of the second lens L2, the third lens L3 and the sixth lens L6 are all aspherical surfaces. Table 8b shows the cone constant k, and high-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical mirror surface in the eighth embodiment.

[0156] Table 8a

[0157]

[0158] Table 8b

[0159]

[0160] See also Fig.16 ,Depend on Fig.16 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the eighth embodiment that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.16 (A) Fig.16 Middle (B) and Fig.16 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 In (A), Figure 2 In (B), Figure 2 The contents described in (C) will not be repeated here.

[0161] Table 9 shows the FOV, TTL / H, TTL / F, FOV / FNO, H / F, (R12-R21) / CT12, R12 / R21, F2 / CT2, F3 / F, SD21 / SD22, SD11 / H, SD11 / SD12, CT1 / CT2, CT3 / CT34, F2 / F1, CT5 / CT4, ET5 / ET4, VD4, VD5, R11 / R21, and the like in the optical lens 100 of the first embodiment to the eighth embodiment. The values ​​of |R12+CT1), R22 / (R21-CT2), (R11-R22) / CT14, FOV*F / H, F6 / F5, FNO, F1 / F, F2 / F, F4 / F, F6 / F, F1 / CT1, F3 / CT3, F4 / CT4, F5 / CT5, F6 / CT6, R11 / R12, R22 / R21, R32 / R31, R41 / R42, R52 / R51, and |R61 / R62|.

[0162] Table 9

[0163]

[0164]

[0165] See also Fig.17The embodiment of the present application also discloses a camera module 200, which includes a photosensitive chip 201 and the above-mentioned optical lens 100, and the photosensitive chip 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used to receive the light signal of the subject and project it to the photosensitive chip 201, and the photosensitive chip 201 is used to convert the light signal corresponding to the subject into an image signal, which will not be described in detail here. The camera module with the optical lens 100 can realize the miniaturization design of the optical lens 100, and at the same time make the optical lens 100 have the characteristics of a large field of view.

[0166] See also Fig.18 The embodiment of the present application further discloses a terminal device 300, which includes a housing 301 and the camera module 200, and the camera module 200 is arranged in the housing 301. The terminal device 300 may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, etc. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100, that is, it can realize the miniaturization design of the optical lens 100, and at the same time make the optical lens 100 have the characteristics of a large field of view.

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

Claims

1. An optical lens, characterized in that: There are a total of six lenses with refractive power, which successively include, from the object side to the image side along the optical axis: The first lens, having negative refractive power, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens, having negative refractive power, the object side surface of the second lens is concave near the optical axis, and the image side surface of the second lens is convex near the optical axis; The third lens, having positive refractive power, both the object side surface and the image side surface of the third lens are convex near the optical axis; The fourth lens, having negative 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 concave near the optical axis; The fifth lens, having positive refractive power, both the object side surface and the image side surface of the fifth lens are convex near the optical axis; The sixth lens, having negative refractive power, the image side surface of the sixth lens is concave near the optical axis; The optical lens satisfies the following relational expressions: 65° < FOV < 75°, 3.5 < TTL / H < 4.2; 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 H is the image height corresponding to the maximum field of view angle of the optical lens.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 4 < TTL / F < 5.5, and / or, 40° < FOV / FNO < 45°, and / or, 1.1 < H / F < 1.3; Wherein, F is the effective focal length of the optical lens, and FNO is the aperture number of the optical lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 2 < (R12 - R21) / CT12 < 3, and / or, -1.1 < R12 / R21 < -0.7, and / or, F2 / CT2 > -20, and / or, 1 < F3 / F < 2; Wherein, R12 is the curvature radius of the image side surface of the first lens on the optical axis, R21 is the curvature radius of the object side surface of the second lens on the optical axis, CT12 is the distance between the image side surface of the first lens and the object side surface of the second lens on the optical axis, F2 is the effective focal length of the second lens, CT2 is the thickness of the second lens on the optical axis, F3 is the effective focal length of the third lens, and F is the effective focal length of the optical lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 0.85 < SD21 / SD22 < 0.95, and / or, 1.4 < SD11 / H < 1.8, and / or, 1.4 < SD11 / SD12 < 2; Wherein, SD21 is the maximum effective aperture of the object side surface of the second lens, SD22 is the maximum effective aperture of the image side surface of the second lens, SD11 is the maximum effective aperture of the object side surface of the first lens, and SD12 is the maximum effective aperture of the image side surface of the first lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 0.9 < CT1 / CT2 < 2, and / or, CT3 / CT34 < 4, and / or, 1 < F2 / F1 < 6; Wherein, CT1 is the thickness of the first lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, CT3 is the thickness of the third lens on the optical axis, CT34 is the distance on the optical axis between the image side of the third lens and the object side of the fourth lens, F2 is the effective focal length of the second lens, and F1 is the effective focal length of the first lens.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 1 < CT5 / CT4 < 8, and / or, 0.5 < ET5 / ET4 < 2.5, and / or, VD4 < 21, and / or, VD5 > 65; Wherein, CT5 is the thickness of the fifth lens on the optical axis, CT4 is the thickness of the fourth lens on the optical axis, ET5 is the distance on the optical axis between the maximum effective aperture of the object side of the fifth lens and the maximum effective aperture of the image side of the fifth lens, ET4 is the distance on the optical axis 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, VD4 is the Abbe number of the fourth lens, and VD5 is the Abbe number of the fifth lens.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 1.1 < R11 / (R12 + CT1) < 1.6, and / or, 0.75 < R22 / (R21 - CT2) < 1.2, and / or, 1.4 < (R11 - R22) / CT14 < 2.2; Wherein, R11 is the curvature radius of the object side of the first lens at the optical axis, R12 is the curvature radius of the image side of the first lens at the optical axis, CT1 is the thickness of the first lens on the optical axis, R22 is the curvature radius of the image side of the second lens at the optical axis, R21 is the curvature radius of the object side of the second lens at the optical axis, CT2 is the thickness of the second lens on the optical axis, and CT14 is the distance between the intersection of the object side of the first lens and the optical axis and the intersection of the image side of the fourth lens and the optical axis.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following conditional expressions: 48° < FOV*F / H < 65°, and / or, -7 < F6 / F5 < -3; Wherein, F is the effective focal length of the optical lens, F6 is the effective focal length of the sixth lens, and F5 is the effective focal length of the fifth lens.

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

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

Images