Optical lens, image capturing module and terminal device

Abstract

The application discloses an optical lens, an image-taking module and a terminal device. The optical lens comprises seven lenses with refractive power. The first lens has negative refractive power, the object side is a convex surface, and the image side is a concave surface. The second lens has negative refractive power, the object side is a convex surface, and the image side is a concave surface. The third lens has refractive power, the object side is a concave surface, and the image side is a convex surface. The fourth lens has positive refractive power, the object side is a convex surface. The fifth lens has positive refractive power, the object side and the image side are both convex surfaces. The sixth lens has negative refractive power, the object side is a concave surface, and the image side is a convex surface. The seventh lens has positive refractive power, the object side is a convex surface. The optical lens satisfies the following relationship: 190deg < FOV < 210deg and 1.65 < IMGH / F < 1.8. The optical lens, the image-taking module and the terminal device can meet the miniaturized design of the optical lens, have a large field of view, and improve the imaging quality.

Description

TECHNICAL FIELD

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

[0002] A vehicle-mounted lens is a key component for an automatic driving auxiliary system to obtain external information. With the rapid development of the automatic driving auxiliary system, the performance requirements for a front-view optical lens are increasingly high. Meanwhile, with the increasing requirement for night driving of the automatic driving, the requirement for night vision of the vehicle-mounted lens is also increasingly high. However, the vehicle-mounted lens in the related art has serious problems of lens chromatic aberration, astigmatism, distortion and other aberrations, and the vehicle-mounted lens in the related art has a large overall size and cannot meet the design requirements of miniaturization and the imaging requirements of a large viewing angle. SUMMARY

[0003] The present application provides an optical lens, an image-taking module and a terminal device, which can meet the design requirements of miniaturization of the optical lens, have a large viewing angle, and improve the imaging quality.

[0004] To achieve the above-mentioned purpose, in a first aspect, the embodiments of the present application disclose an optical lens, which has seven lenses with refractive power, and the lenses include, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens.

[0005] The first lens has negative refractive power, and the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface of the first lens is a concave surface at the near optical axis.

[0006] The second lens has negative refractive power, and the object side surface of the second lens is a convex surface at the near optical axis, and the image side surface of the second lens is a concave surface at the near optical axis.

[0007] The third lens has refractive power, and the object side surface of the third lens is a concave surface at the near optical axis, and the image side surface of the third lens is a convex surface at the near optical axis.

[0008] The fourth lens has positive refractive power, and the object side surface of the fourth lens is a convex surface at the near optical axis.

[0009] The fifth lens has positive refractive power, and the object side surface and the image side surface of the fifth lens are both convex surfaces at the near optical axis.

[0010] The sixth lens has negative refractive power, and the object side surface of the sixth lens is a concave surface at the near optical axis, and the image side surface of the sixth lens is a convex surface at the near optical axis.

[0011] The seventh lens has positive refractive power, and a convex surface on the object side of the seventh lens at the near optical axis;

[0012] The optical lens satisfies the following relationship:

[0013] 190deg < FOV < 210deg and 1.65 < IMGH / F < 1.8;

[0014] Wherein, FOV is the maximum field of view angle of the optical lens, IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens, and F is the focal length of the optical lens.

[0015] In some optional embodiments, the optical lens satisfies the relationship:

[0016] The optical lens satisfies the following relationship:

[0017] 7 < TTL / IMGH < 7.3, and / or, 12 < TTL / F < 13, and / or, CT45 / CT34 > 2;

[0018] Wherein, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, CT45 is the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens, and CT34 is the distance on the optical axis from the image side of the third lens to the object side of the fourth lens.

[0019] The optical lens satisfies the relationship 7 < TTL / IMGH < 7.3, which can realize large image surface imaging while taking into account the miniaturization design of the optical lens, thereby being conducive to improving the imaging clarity of the optical lens and further improving the imaging quality of the optical lens.

[0020] The optical lens satisfies the relationship 12 < TTL / F < 13, which can realize the miniaturization design of the optical lens while taking into account the wide-angle characteristics of the optical lens.

[0021] The optical lens satisfies the relationship CT45 / CT34 > 2, which can reasonably control the distance between the fourth lens and the fifth lens and the distance between the third lens and the fourth lens, so that the arrangement distance between the third lens, the fourth lens and the fifth lens is appropriate, which is conducive to the miniaturization design of the optical lens. Especially when the diaphragm is located between the fourth lens and the fifth lens, the reasonable distance also enables the light to enter the fourth lens and the fifth lens from the third lens smoothly, thereby correcting the distortion of the optical lens and reducing the aberration generated by the optical lens, and improving the imaging quality.

[0022] In some optional embodiments, the optical lens satisfies the relationship:

[0023] -6 < F1 / F < -4, and / or, 3 < F4 / F < 8, and / or, 1 < F1 / F2 < 3;

[0024] wherein, F1 is the focal length of the first lens, F4 is the fourth lens, F2 is the focal length of the second lens.

[0025] When the optical lens satisfies -6 < F1 / F < -4 and 3 < F4 / F < 8, the focal lengths of the first lens and the fourth lens can be reasonable, so that the light can be more focused into the optical lens, thereby being conducive to improving the imaging quality of the optical lens.

[0026] When the optical lens satisfies 1 < F1 / F2 < 3, the focal lengths of the first lens and the second lens can be reasonably controlled, so that the refractive power of the first lens and the second lens is reasonable, thereby being conducive to the light entering the second lens more gently from the first lens, so that the distortion of the optical lens can be corrected and the aberration generated by the optical lens can be reduced, and the imaging quality can be improved.

[0027] In some optional embodiments, the optical lens satisfies the following relationship:

[0028] 1.5 < SD1 / SD3 < 2.1, and / or, 1.1 < SD3 / IMGH < 1.4, and / or, 0.9 < SD8 / SD9 < 1.2, and / or, -3 < R10 / SD10 < -1;

[0029] wherein, SD1 is the maximum effective half aperture of the object side of the first lens, SD3 is the maximum effective half aperture of the object side of the second lens, SD8 is the maximum effective half aperture of the image side of the fourth lens, SD9 is the maximum effective half aperture of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, and SD10 is the maximum effective half aperture of the image side of the fifth lens.

[0030] When the optical lens satisfies 1.5 < SD1 / SD3 < 2.1, the ratio of the maximum effective half aperture of the object side of the first lens and the maximum effective half aperture of the object side of the second lens can be reasonably controlled, so that the transition between the object sides of the first lens and the second lens is relatively gentle, thereby facilitating the light to pass through the first lens into the second lens, and thereby the trend of the light can be controlled.

[0031] When the optical lens satisfies 1.1 < SD3 / IMGH < 1.4, the maximum effective half aperture of the object side of the second lens can be roughly matched with the imaging surface of the optical lens, which is conducive to more light entering the imaging surface of the optical lens, thereby realizing large imaging surface imaging.

[0032] When the optical lens satisfies the relationship 0.9 < SD8 / SD9 < 1.2, the maximum effective half-aperture of the image side of the fourth lens and the object side of the fifth lens can be controlled, so that the transition between the fourth lens and the fifth lens is smooth, the step difference between the fourth lens and the fifth lens is reduced, the light can enter the fifth lens smoothly, the light incident angle after the light passes through the diaphragm is reduced, more light enters the optical lens on the image side, and the illumination of the optical lens is improved.

[0033] When the optical lens satisfies the relationship -3 < R10 / SD10 < -1, the face type of the image side of the fifth lens can be reasonably controlled, so that the fifth lens is not too curved, and the processing of the fifth lens is facilitated.

[0034] In some optional embodiments, the optical lens satisfies the relationship:

[0035] -5 < CT3 / SAGS5 < -2, and / or, 1.2 < CT5 / ET5 < 2.1, and / or, 1.2 < CT7 / ET7 < 1.5;

[0036] CT3 is the thickness of the third lens on the optical axis, SAGS5 is the distance from the maximum effective half-aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis in the direction of the optical axis, CT5 is the thickness of the fifth lens on the optical axis, ET5 is the distance from the maximum effective aperture of the object side of the fifth lens to the maximum effective aperture of the image side of the fifth lens on the optical axis, CT7 is the thickness of the seventh lens on the optical axis, and ET7 is the distance from the maximum effective aperture of the object side of the seventh lens to the maximum effective aperture of the image side of the seventh lens on the optical axis.

[0037] Since the third lens is a concave-convex lens, when the optical lens satisfies the relationship -5 < CT3 / SAGS5 < -2, the thickness of the third lens can be reasonably controlled, and the face type design of the third lens can be considered at the same time. The third lens is not too curved, which is not conducive to molding due to insufficient thickness, or the third lens is not curved enough, which is not conducive to the miniaturization design of the optical lens.

[0038] When the optical lens satisfies the relationship 1.2 < CT5 / ET5 < 2.1 and 1.2 < CT7 / ET7 < 1.5, the thickness ratio of each lens can be reasonably controlled, so that the face type of each lens is optimized, which is conducive to the effective convergence of the light with a large angle of incidence, and the light passing through the corresponding lens has a small deflection angle, so that the generation of stray light is reduced, and the imaging performance is ensured.

[0039] In some optional embodiments, the optical lens satisfies the relationship:

[0040] 1.2 < R6 / R5 < 1.4, and / or, -2 < R9 / R10 < -1, and / or, R11 / R12 < 0.5;

[0041] wherein, R6 is a curvature radius of an image-side surface of the third lens at the optical axis, R5 is a curvature radius of an object-side surface of the third lens at the optical axis, R9 is a curvature radius of an object-side surface of the fifth lens at the optical axis, R10 is a curvature radius of an image-side surface of the fifth lens at the optical axis, R11 is a curvature radius of an object-side surface of the sixth lens at the optical axis, and R12 is a curvature radius of an image-side surface of the sixth lens at the optical axis.

[0042] When the optical lens satisfies the relationship 1.2 < R6 / R5 < 1.4, by reasonably controlling the curvature radii of the image-side surface and the object-side surface of the third lens at the optical axis, the incident light rays after being refracted by the first lens and the second lens can be effectively collected and compressed, the light rays are smoothly transitioned into the rear optical lens, the aberration is reduced, and the imaging quality of the optical lens is improved.

[0043] When the optical lens satisfies the relationship -2 < R9 / R10 < -1, by reasonably matching the ratio between the curvature radii of the object-side surface and the image-side surface of the fifth lens at the optical axis, the surface type difference of the fifth lens is reasonable, which is conducive to controlling the shape of the fifth lens, and thus the aberration generated by itself can be corrected, and the imaging quality is improved.

[0044] When the optical lens satisfies the relationship R11 / R12 < 0.5, by reasonably matching the ratio between the curvature radii of the object-side surface and the image-side surface of the sixth lens at the optical axis, the surface type difference of the sixth lens is reasonable, which is conducive to controlling the shape of the sixth lens, and thus the aberration generated by itself can be corrected, and the imaging quality is improved.

[0045] In some optional embodiments, the optical lens satisfies the relationship:

[0046] -10 < F1 / CT1 < -5, and / or, F7 / CT7 < 5, and / or, 0.9 < (CT1+CT2) / CT12 < 1.3;

[0047] wherein, F1 is a focal length of the first lens, CT1 is a thickness of the first lens on the optical axis, F7 is a focal length of the seventh lens, CT7 is a thickness of the seventh lens on the optical axis, CT2 is a thickness of the second lens on the optical axis, and CT12 is a distance from the image-side surface of the first lens to the object-side surface of the second lens on the optical axis.

[0048] When the optical lens satisfies the relationship -10 < F1 / CT1 < -5 and F7 / CT7 < 5, the relationship between the focal length and the thickness of each lens can be reasonably limited, thereby facilitating the correction of aberration and being conducive to improving the assembly yield of the optical lens.

[0049] The optical lens satisfies the relationship 0.9 < (CT1+CT2) / CT12 < 1.3, which can reasonably control the ratio of the sum of the thicknesses of the first lens and the second lens on the optical axis to the interval of the first lens and the second lens on the optical axis, so that the assembly of the first lens and the second lens is more compact, thereby facilitating the miniaturization design of the optical lens.

[0050] In some optional embodiments, the optical lens satisfies the relationship:

[0051] 0.52 < DOS / TTL < 0.65, and / or, 110deg < FOV*F / IMGH < 120deg, and / or, 3 < CTMAX / CTMIN < 4.2;

[0052] wherein DOS is the distance from the object side of the first lens to the diaphragm of the optical lens on the optical axis, TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, CTMAX is the maximum thickness of the first lens to the seventh lens on the optical axis, and CTMIN is the minimum thickness of the first lens to the seventh lens on the optical axis.

[0053] The optical lens satisfies the relationship 0.52 < DOS / TTL < 0.65, which can reasonably control the position of the diaphragm, not only facilitating the miniaturization design of the optical lens, but also being capable of controlling the number of light rays passing through the diaphragm, thereby facilitating the adjustment of the brightness and contrast of the optical lens.

[0054] The optical lens satisfies the relationship 110deg < FOV*F / IMGH < 120deg, which can realize the large-angle resolution of the optical lens by reasonably controlling the mutual relationship among the total effective focal length of the optical lens, the maximum field of view angle of the optical lens, and the image height corresponding to the maximum field of view angle of the optical lens, thereby facilitating the small distortion and large field of view angle of the optical lens, and improving the overall effect of the optical lens.

[0055] The optical lens satisfies the relationship 3 < CTMAX / CTMIN < 4.2, which can control the thickness of each lens by controlling the ratio of the maximum thickness to the minimum thickness in the seven lenses, thereby facilitating the miniaturization design of the optical lens in the assembled state.

[0056] In a second aspect, the present application discloses an image capturing module, which comprises an image sensor and the optical lens as described in the first aspect, and the image sensor is arranged on the image side of the optical lens.

[0057] In a third aspect, the present application discloses a terminal device, comprising a device main body and the image capturing module according to the second aspect.

[0058] Compared with the related art, the present application has the following beneficial effects:

[0059] In the optical lens, in order to meet the requirements of miniaturization design, large field of view and small distortion, the first lens has negative refractive power, the object side and the image side of the first lens are convex and concave near the optical axis, respectively, so that the first lens is formed as a concave-convex lens, which can effectively collect incident light of a large field of view, so that more light can enter the optical lens, and the optical lens has a large field of view. The second lens also has negative refractive power, and the object side and the image side of the second lens are convex and concave near the optical axis, respectively, which can collect light from the first lens and also make the light enter the optical lens gently, thereby correcting the distortion of the optical lens and reducing the aberration of the optical lens, and improving the imaging quality. The third lens has refractive power, and the object side and the image side of the third lens are concave and convex near the optical axis, respectively, which is conducive to correcting the field curvature of the optical lens, and also collecting and compressing light, so that the light can be gently transitioned to the lens on the rear side. The fourth lens has positive refractive power, and the object side of the fourth lens is convex near the optical axis, which is conducive to correcting the aberration of the optical lens, and also reducing the light incidence angle of the light after passing through the diaphragm, so that more light can enter the optical lens. The fifth lens has positive refractive power, and the object side and the image side of the fifth lens are both convex near the optical axis, and the sixth lens has negative refractive power, and the object side of the sixth lens is concave near the optical axis and the image side of the sixth lens is convex near the optical axis, so that the fifth lens and the sixth lens can cooperate to help eliminate chromatic aberration, correct the astigmatism of the optical lens, and improve the imaging quality of the optical lens. The seventh lens has positive refractive power, and the object side of the seventh lens is convex near the optical axis, which can converge light and reduce the total length of the optical lens, and further realize the miniaturization design of the optical lens.

[0060] The optical lens satisfies the relationship 190deg<FOV<210deg, so that the optical lens has a large field of view and can realize wide-angle imaging. In addition, the optical lens satisfies the relationship 1.65<IMGH / F<1.8, which can meet the requirements of a large imaging surface and miniaturization of the optical lens. BRIEF DESCRIPTION OF DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0062] Figure 1 is a structural schematic diagram of an optical lens disclosed by Embodiment 1 of the present application;

[0063] Figure 2 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 1 of the present application;

[0064] Figure 3 is a structural schematic diagram of an optical lens disclosed by Embodiment 2 of the present application;

[0065] Figure 4 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 2 of the present application;

[0066] Figure 5 is a structural schematic diagram of an optical lens disclosed by Embodiment 3 of the present application;

[0067] Figure 6 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 3 of the present application;

[0068] Figure 7 is a structural schematic diagram of an optical lens disclosed by Embodiment 4 of the present application;

[0069] Figure 8 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 4 of the present application;

[0070] Figure 9 is a structural schematic diagram of an optical lens disclosed by Embodiment 5 of the present application;

[0071] Figure 10 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 5 of the present application;

[0072] Figure 11 is a structural schematic diagram of an optical lens disclosed by Embodiment 6 of the present application;

[0073] Figure 12 is a spherical aberration diagram, an astigmatism curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 6 of the present application;

[0074] Figure 13 is a structural schematic diagram of an optical lens disclosed by Embodiment 7 of the present application;

[0075] Figure 14 is a spherical aberration diagram, a coma curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 7 of the present application;

[0076] Figure 15 is a structural schematic diagram of the optical lens disclosed by Embodiment 8 of the present application;

[0077] Figure 16 is a spherical aberration diagram, a coma curve diagram and a distortion curve diagram of the optical lens disclosed by Embodiment 8 of the present application;

[0078] Figure 17 is a structural schematic diagram of the image taking module disclosed by the present application;

[0079] Figure 18 is a structural schematic diagram of the terminal device applied to a car disclosed by the present application. DETAILED DESCRIPTION

[0080] 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 labor fall within the scope of protection of the present application.

[0081] In the present application, the positions or location relationships indicated by the terms “inner”, “outer” and the like are based on the positions or location relationships shown in the drawings. These terms are mainly used for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific position, or to be constructed and operated in a specific position.

[0082] In addition, the above-mentioned part of the terms can be used to represent other meanings in addition to the position or location relationship, for example, the term “upper” can also be used to represent a certain dependent relationship or connection relationship in some cases. Those skilled in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0083] In addition, the terms “set”, “provided” should be understood broadly. Those skilled in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0084] In addition, the terms “first”, “second” and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of “multiple” is two or more.

[0085] The technical solutions of the present application will be further described below with reference to the embodiments and drawings.

[0086] Please refer to Figure 1 The present application discloses an optical lens 100, which comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 arranged in sequence along an optical axis from an object side to an image side. 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.

[0087] In some embodiments, 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 or a negative 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.

[0088] In some embodiments, the object side surface S1 of the first lens L1 is convex at the vicinity of the optical axis, and the image side surface S2 of the first lens L1 is concave at the vicinity of the optical axis. The object side surface S3 of the second lens L2 is convex at the vicinity of the optical axis, and the image side surface S4 of the second lens L2 is concave at the vicinity of the optical axis. The object side surface S5 of the third lens L3 is concave at the vicinity of the optical axis, and the image side surface S6 of the third lens L3 is convex at the vicinity of the optical axis. The object side surface S7 of the fourth lens L4 is convex at the vicinity of the optical axis, and the image side surface S8 of the fourth lens L4 is convex or concave at the vicinity of the optical axis. The object side surface S9 and the image side surface S10 of the fifth lens L5 can both be convex at the vicinity of the optical axis. The object side surface S11 of the sixth lens L6 is concave at the vicinity of the optical axis, and the image side surface S12 of the sixth lens L6 is convex at the vicinity of the optical axis. The object side surface S13 of the seventh lens L7 is convex at the vicinity of the optical axis, and the image side surface S14 of the seventh lens L7 can be concave or convex at the vicinity of the optical axis.

[0089] Optionally, all the seven lenses can be made of plastic lenses, so that the optical lens 100 is relatively light and convenient for processing of complex surface shapes. Alternatively, all the seven lenses can be made of glass lenses, or some lenses can be made of plastic lenses and some lenses can be made of glass lenses.

[0090] Optionally, the first lens L1 to the seventh lens L7 can all be spherical lenses, or they can all be aspherical lenses. Alternatively, some lenses can be spherical and some lenses can be aspherical. For example, 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 spherical lenses, while the seventh lens L7 can be an aspherical lens. In this way, the combination of spherical and aspherical lenses can improve high-order aberrations and thus enhance imaging quality.

[0091] In some embodiments, the optical lens 100 may further include an aperture STO, which is disposed between the fourth lens element L4 and the fifth lens element L5. The use of a central aperture STO facilitates aberration correction in the optical lens 100. Of course, as another example, the aperture STO may also be disposed between other lenses, such as between the second lens element L2 and the third lens element L3, or between the first lens element L1 and the second lens element L2. The specific arrangement may be determined based on actual needs and is not specifically limited in this embodiment.

[0092] In some embodiments, the optical lens 100 further includes an IR filter, disposed between the image-side surface S14 of the seventh lens L7 and the imaging surface IMG of the optical lens 100. In this embodiment, the IR filter can be an infrared cutoff filter, thereby filtering out light from other wavelengths, such as infrared light, while allowing only visible light to pass through, improving the image quality more consistent with the human eye's visual experience. Alternatively, the IR filter can be an infrared bandpass filter, thereby filtering out light from other wavelengths, such as visible light, while allowing only infrared light to pass through. By filtering out light from other wavelengths, such as visible light, the image quality is improved. Furthermore, the optical lens 100 can function as an infrared optical lens, enabling it to capture images in dimly lit environments and other specialized applications, achieving superior imaging results. Preferably, the IR filter can be made of glass. In other embodiments, the IR filter can also be made of optical glass with a coating, or other materials. The selection of the material is based on practical needs and is not specifically limited in this embodiment.

[0093] In some embodiments, the optical lens 100 further includes a protective glass CG, which is disposed between the filter IR and the imaging surface IMG, so that the protective glass CG can be close to the image sensor during subsequent assembly to provide protection.

[0094] In some embodiments, the optical lens 100 satisfies a relationship 190deg < FOV < 210deg, where FOV is the maximum field of view angle of the optical lens 100. When the optical lens 100 satisfies the relationship, the optical lens can have a large field of view angle, and thus can achieve wide-angle imaging. Preferably, the relationship can further satisfy 192deg < FOV < 206deg, so that the optical lens 100 can better achieve wide-angle imaging.

[0095] In some embodiments, the optical lens 100 satisfies a relationship FNO < 2.1, where FNO is the F-number of the optical lens 100. In this way, the optical lens 100 has a large aperture characteristic, which can improve the light intake of the optical lens 100, so that the optical lens 100 can also be applicable to night or low ambient brightness (e.g., rainy day) scenes, thereby meeting the imaging needs of dark environments.

[0096] In some embodiments, the optical lens 100 satisfies a relationship 95deg < FOV / FNO < 101deg. By reasonably controlling the relationship between the field of view angle FOV and the F-number FNO of the optical lens 100, the optical lens 100 is provided with a reasonable field of view angle and F-number, which can balance the design difficulty and the field of view angle requirement, while making the aperture change within a reasonable range, providing a combination effect of large field of view angle and large aperture, and meeting the characteristics of the optical lens 100 having a large aperture, a high relative luminance, and small distortion.

[0097] In some embodiments, the optical lens 100 satisfies a relationship 1.65 < IMGH / F < 1.8, where F is the focal length of the optical lens 100, and IMGH is half of the image height corresponding to the maximum field of view angle of the optical lens 100. When the relationship is satisfied, the optical lens 100 can meet the requirement of a large target surface while meeting the conditions of the optical lens 100 being small in size and being miniaturized.

[0098] In some embodiments, the optical lens 100 satisfies a relationship 7 < TTL / IMGH < 7.3, where TTL is the distance from the object side S1 of the first lens L1 to the imaging surface of the optical lens 100 on the optical axis. When the optical lens 100 satisfies the relationship, the optical lens 100 can achieve large image surface imaging while taking into account the miniaturized design of the optical lens 100, thereby being conducive to improving the imaging clarity of the optical lens 100, and thus being conducive to improving the imaging quality of the optical lens 100.

[0099] In some embodiments, the optical lens 100 satisfies a relationship 12 < TTL / F < 13. Wherein, TTL is a distance from the object side S1 of the first lens L1 to an imaging surface of the optical lens 100 on the optical axis, and F is a focal length of the optical lens 100. When the optical lens 100 satisfies the relationship, the optical lens 100 can be miniaturized while having a wide-angle characteristic.

[0100] In some embodiments, the optical lens 100 satisfies a relationship CT45 / CT34 > 2. Wherein, CT45 is a distance from the image side of the fourth lens L4 to the object side of the fifth lens L5 on the optical axis, and CT34 is a distance from the image side of the third lens L3 to the object side of the fourth lens L4 on the optical axis. When the relationship is satisfied, the distance between the fourth lens L4 and the fifth lens L5 and the distance between the third lens L3 and the fourth lens L4 can be reasonably controlled, so that the arrangement distance between the third lens L3, the fourth lens L4 and the fifth lens L5 is appropriate, which is conducive to the miniaturization design of the optical lens 100. Especially when the stop is located between the fourth lens and the fifth lens, the reasonable distance also enables the light to enter the fourth lens L4 and the fifth lens L5 from the third lens L3 gently, thereby correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality. Preferably, the relationship can further satisfy 3 < CT45 / CT34 < 13.

[0101] In some embodiments, the optical lens 100 satisfies a relationship -6 < F1 / F < -4. Wherein, F1 is a focal length of the first lens L1. When the relationship is satisfied, the focal length of the first lens L1 can be reasonably distributed, so that the first lens L1 can provide negative refractive power, which is conducive to light convergence, and helps to reduce the overall spherical aberration, chromatic aberration and distortion of the first lens L1 to a reasonable position, reduces the design difficulty of the rear lens, and improves the overall resolving power of the optical lens 100 and strengthens the peripheral aberration correction of the optical lens 100. In addition, it is also conducive to the size compression of the first lens L1, thereby helping to form a small size optical lens 100.

[0102] In some embodiments, the optical lens 100 satisfies a relationship -4 < F2 / F < -2. Wherein, F2 is a focal length of the second lens L2. By controlling the ratio of the focal length of the second lens L2 to the focal length of the optical lens 100, the focal length of the second lens L2 can be reasonably distributed, which can reduce the angle of the light incident from the first lens L1, and is conducive to improving the overall resolving power of the optical lens 100 and strengthening the peripheral aberration correction of the optical lens 100.

[0103] In some embodiments, the optical lens 100 satisfies a relationship |F3 / F|>30, where F3 is the focal length of the third lens L3. When the relationship is satisfied, the focal length of the third lens L3 can be reasonably distributed, so that the third lens L3 can provide positive refractive power for the optical lens 100, thereby providing better light convergence capability for the optical lens 100, while correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality of the optical lens 100.

[0104] In some embodiments, the optical lens 100 satisfies a relationship 3<F4 / F<8, where F4 is the focal length of the fourth lens L4. When the relationship is satisfied, the focal length of the fourth lens L4 can be reasonably distributed, so that the fourth lens L4 can provide positive refractive power for the optical lens 100, thereby providing better light convergence capability for the optical lens 100, while correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality of the optical lens 100.

[0105] In some embodiments, the optical lens 100 satisfies a relationship 1<F5 / F<3, where F5 is the focal length of the fifth lens L5. When the relationship is satisfied, the refractive power of the fifth lens L5 can be reasonably distributed, thereby providing better light convergence capability for the optical lens 100, while correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies a relationship F6 / F<-1.5, where F6 is the focal length of the sixth lens L6. When the relationship is satisfied, the focal length of the sixth lens L6 can be reasonably distributed, and the refractive power of the fifth lens can be reasonably distributed, thereby correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality of the optical lens 100.

[0107] In some embodiments, the optical lens 100 satisfies a relationship 3 < F7 / F < 5, where F7 is the focal length of the seventh lens L7. Since the seventh lens L7 provides positive refractive power for the optical lens 100, providing the main light converging capability of the lens group of the optical lens 100, by controlling the ratio of the focal length of the seventh lens L7 to the focal length of the optical lens 100, it is beneficial to reasonably distribute the positive focal power of the optical lens 100 and shorten the total optical length of the optical lens 100. When exceeding the upper limit of the relationship, the focal length of the seventh lens L7 is too large, the light deflection is large, and the aberration of the off-axis field is easily increased. When the lower limit of the relationship is exceeded, the focal length of the optical lens 100 is too large, and the total length of the optical lens 100 is too long, which is not conducive to the miniaturization design of the optical lens 100. Alternatively, the relationship can further satisfy 4 < F7 / F < 20, so that the focal length of the seventh lens L7 is reasonable, and the miniaturization design of the optical lens 100 is achieved.

[0108] In some embodiments, the optical lens 100 satisfies a relationship 1 < F1 / F2 < 3, which can reasonably control the focal lengths of the first lens L1 and the second lens L2, so that the refractive powers of the first lens L1 and the second lens L2 are reasonable, and thus it is beneficial for the light to enter the second lens L2 from the first lens L1 more gently, thereby correcting the distortion of the optical lens 100 and reducing the aberration generated by the optical lens 100, and improving the imaging quality.

[0109] In some embodiments, the optical lens 100 satisfies a relationship 1.5 < SD1 / SD3 < 2.1, where SD1 is the maximum effective half aperture of the object side S1 of the first lens L1, and SD3 is the maximum effective half aperture of the object side S3 of the second lens L2. When the optical lens 100 satisfies the relationship 1.5 < SD1 / SD3 < 2.1, the ratio of the maximum effective half aperture of the object side S1 of the first lens L1 and the maximum effective half aperture of the object side S3 of the second lens L2 can be reasonably controlled, so that the transition between the object sides of the first lens L1 and the second lens L2 is relatively gentle, and thus it is beneficial for the light to pass through the first lens L1 and enter the second lens L2, and thus it is beneficial to control the trend of the light.

[0110] In some embodiments, the optical lens 100 satisfies a relationship 1.1 < SD3 / IMGH < 1.4. When the relationship is satisfied, the maximum effective half aperture of the object side S3 of the second lens L2 is approximately matched with the imaging surface of the optical lens, which is beneficial for more light to enter the imaging surface of the optical lens, and thus large-aperture imaging can be achieved.

[0111] In some embodiments, the optical lens 100 satisfies a relationship of 0.9 < SD8 / SD9 < 1.2, where SD8 is the maximum effective half aperture of the image side S8 of the fourth lens L4, and SD9 is the maximum effective half aperture of the object side S9 of the fifth lens L5. When the relationship is satisfied, the maximum effective half apertures of the image side of the fourth lens L4 and the object side of the fifth lens L5 can be controlled, so that the transition between the fourth lens L4 and the fifth lens L5 is smooth, the step difference between the two is reduced, and then it is beneficial for the light to enter the fifth lens smoothly, it is beneficial to reduce the light incident angle after the light passes through the diaphragm, so that more light enters the optical lens on the image side, and the illumination of the optical lens is improved.

[0112] In some embodiments, the optical lens 100 satisfies a relationship of -3 < R10 / SD10 < -1, where R10 is the curvature radius of the image side of the fifth lens L5 at the optical axis, and SD10 is the maximum effective half aperture of the image side of the fifth lens L5. When the relationship is satisfied, the surface shape of the image side S10 of the fifth lens L5 can be reasonably controlled, so that the fifth lens L5 is not too curved, and the processing of the fifth lens L5 is facilitated.

[0113] In some embodiments, the optical lens 100 satisfies a relationship of -5 < CT3 / SAGS5 < -2, where SAGS5 is the distance in the optical axis direction from the maximum effective half aperture of the object side S5 of the third lens L3 to the intersection of the object side S1 of the first lens L1 and the optical axis (i.e. the sag of the object side S5 of the third lens L3), and CT3 is the thickness of the third lens L3 on the optical axis. When the relationship is satisfied, the surface shape of the third lens L and the thickness of the third lens L can be reasonably controlled, so that the overall thickness of the third lens L on the optical axis is controlled, and the third lens L is more lightweight.

[0114] In some embodiments, the optical lens 100 satisfies a relationship of -10 < F1 / CT1 < -5, where CT1 is the thickness of the first lens L1 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the first lens L1 can be reasonably configured, so that the incident angle of the light in the optical lens 100 can be effectively controlled, the sensitivity of the optical lens 100 is reduced, it is beneficial to correct the aberration generated by the optical lens 100, and then it is beneficial to improve the imaging quality of the optical lens 100.

[0115] In some embodiments, the optical lens 100 satisfies the relationship equation -8 <F2 / CT2<-4,其中,CT2是第二透镜L2于光轴上的厚度。满足该关系式时,能够对第二透镜L2的屈折力和厚度进行合理配置,从而能够有效控制光学镜头100中光线的入射角,降低光学镜头100的敏感度,有利于矫正光学镜头100产生的像差,进而有利于提升光学镜头100的成像品质。

[0116] In some embodiments, the optical lens 100 satisfies the relationship |F3 / CT3|>20. When this relationship is satisfied, the refractive power and thickness of the third lens element L3 can be appropriately configured, thereby allowing light to enter the optical lens 100 more smoothly, reducing the sensitivity of the optical lens 100, and facilitating correction of aberrations generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0117] In some embodiments, the optical lens 100 satisfies the relationship 2 <F4 / CT4<6,其中,CT4是第四透镜L4于光轴上的厚度。满足该关系式时,能够对第四透镜L4的屈折力和厚度进行合理配置,从而能够使得光线进入光学镜头100中更加平缓,降低光学镜头100的敏感度,有利于矫正光学镜头100产生的像差,进而有利于提升光学镜头100的成像品质。

[0118] In some embodiments, the optical lens 100 satisfies the relationship 1 <F5 / CT5<3,其中,CT5是第五透镜L5于光轴上的厚度。满足该关系式时,能够对第五透镜L5的屈折力和厚度进行合理配置,从而能够使得光线进入光学镜头100中更加平缓,降低光学镜头100的敏感度,有利于矫正光学镜头100产生的像差,进而有利于提升光学镜头100的成像品质。

[0119] In some embodiments, the optical lens 100 satisfies the relationship F6 / CT6<-5, where CT6 is the thickness of the sixth lens element L6 along the optical axis. When this relationship is satisfied, the refractive power and thickness of the sixth lens element L6 can be optimally configured, thereby smoothing the passage of light into the optical lens 100, reducing the sensitivity of the optical lens 100, and facilitating the correction of aberrations generated by the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0120] In some embodiments, the optical lens 100 satisfies a relationship F7 / CT7<5, where CT7 is the thickness of the seventh lens L7 on the optical axis. When the relationship is satisfied, the refractive power and thickness of the seventh lens L7 can be reasonably configured, so that the light entering the optical lens 100 is more gentle, the sensitivity of the optical lens 100 is reduced, which is beneficial to correcting the aberration generated by the optical lens 100, and thus is beneficial to improving the imaging quality of the optical lens 100.

[0121] In some embodiments, the optical lens 100 satisfies relationships 1.2<CT5 / ET5<2.1 and 1.2<CT7 / ET7<1.5, where ET5 is the distance from the maximum effective aperture of the object side of the fifth lens L5 to the maximum effective aperture of the image side of the fifth lens L5 in the direction of the optical axis. ET7 is the distance from the maximum effective aperture of the object side of the seventh lens L7 to the maximum effective aperture of the image side of the seventh lens L7 in the direction of the optical axis. When the relationship is satisfied, the thickness ratio of each lens can be reasonably controlled, so as to optimize the surface shape of each lens, which is beneficial to the effective convergence of the large-angle incident light, and makes the light passing through the corresponding lens have a smaller deflection angle, thereby reducing the generation of stray light, and thus ensuring good imaging performance.

[0122] In some embodiments, the optical lens 100 satisfies relationships 0.8<CT1 / ET1<0.95, 0.4<CT2 / ET2<0.7, 0.9<CT3 / ET3<1, 1.1<CT4 / ET4<1.3, and 0.55<CT6 / ET6<0.75. Wherein ET1 is the distance from the maximum effective aperture of the object side S1 of the first lens to the maximum effective aperture of the image side S2 of the first lens on the optical axis, ET2 is the distance from the maximum effective aperture of the object side of the second lens L2 to the maximum effective aperture of the image side of the second lens L2 in the direction of the optical axis, ET3 is the distance from the maximum effective aperture of the object side of the third lens L3 to the maximum effective aperture of the image side of the third lens L3 in the direction of the optical axis, ET4 is the distance from the maximum effective aperture of the object side of the fourth lens L4 to the maximum effective aperture of the image side of the fourth lens L4 in the direction of the optical axis. ET6 is the distance from the maximum effective aperture of the object side of the sixth lens L6 to the maximum effective aperture of the image side of the sixth lens L6 in the direction of the optical axis. When the relationship is satisfied, the surface shape of each lens can be optimized, so as to reduce the generation of stray light and achieve good imaging quality.

[0123] In some embodiments, the optical lens 100 satisfies the relationship 0.9 < (CT1+CT2) / CT12 < 1.3, where CT12 is the distance on the optical axis from the image side surface of the first lens L1 to the object side surface of the second lens L2. When the relationship is satisfied, the ratio of the sum of the thicknesses of the first lens L1 and the second lens L2 on the optical axis to the distance between the first lens L1 and the second lens L2 on the optical axis is reasonable, which makes the assembly of the first lens L1 and the second lens L2 more compact, thereby facilitating the miniaturization design of the optical lens 100.

[0124] In some embodiments, the optical lens 100 satisfies the relationships 2 < R1 / R2 < 3, 2 < R3 / R4 < 6, |R7 / R8| < 1, and |R13 / R14| < 1. Wherein R1 is the radius of curvature of the object side surface of the first lens L1 at the optical axis, and R2 is the radius of curvature of the image side surface of the first lens L1 at the optical axis. R3 is the radius of curvature of the object side surface of the second lens L2 at the optical axis, and R4 is the radius of curvature of the image side surface of the second lens L2 at the optical axis. R7 is the radius of curvature of the object side surface of the fourth lens L4 at the optical axis, and R8 is the radius of curvature of the image side surface of the fourth lens L4 at the optical axis. R13 is the radius of curvature of the object side surface of the seventh lens L7 at the optical axis, and R14 is the radius of curvature of the image side surface of the seventh lens L7 at the optical axis. When the above relationships are satisfied, the radii of curvature of the object side surface and the image side surface of each lens can be controlled, so that the surface shape of the object side surface and the image side surface of each lens is not too curved, thereby facilitating the control of the shape of each lens. At the same time, the aberration generated by itself can be corrected, and the imaging quality is improved.

[0125] In some embodiments, the optical lens 100 satisfies the relationship 1.2 < R6 / R5 < 1.4, where R5 is the radius of curvature of the object side surface of the third lens L3 at the optical axis, and R6 is the radius of curvature of the image side surface of the third lens L3 at the optical axis. By reasonably controlling the radii of curvature of the object side surface and the image side surface of the third lens L3 at the optical axis, the incident light rays refracted by the first lens L1 and the second lens L2 can be effectively collected and compressed, so that the light rays smoothly transition to the rear optical lens, reduce aberration, and improve the imaging quality of the optical lens.

[0126] In some embodiments, the optical lens 100 satisfies the relationship -2 < R9 / R10 < -1, where R9 is the radius of curvature of the object side surface of the fifth lens L5 at the optical axis, and R10 is the radius of curvature of the image side surface of the fifth lens L5 at the optical axis. By reasonably matching the ratio between the radii of curvature of the object side surface and the image side surface of the fifth lens L5 at the optical axis, the difference in the surface shape of the fifth lens L5 is reasonable, which is conducive to controlling the shape of the fifth lens L5, thereby being able to correct the aberration generated by itself and improve the imaging quality.

[0127] In some embodiments, the optical lens 100 satisfies a relationship R11 / R12<0.5, where R11 is the radius of curvature of the object side surface of the sixth lens L6 at the optical axis, and R12 is the radius of curvature of the image side surface of the sixth lens L6 at the optical axis. By reasonably matching the ratio between the radius of curvature of the object side surface and the image side surface of the sixth lens L6 at the optical axis, the surface type difference of the sixth lens L6 can be reasonably matched, which is beneficial to controlling the shape of the sixth lens L6, thereby correcting the aberration generated by itself and improving the imaging quality.

[0128] In some embodiments, the optical lens 100 satisfies a relationship 0.52<DOS / TTL<0.65, where DOS is the distance from the object side surface of the first lens L1 to the stop STO on the optical axis. When the optical lens 100 satisfies this relationship, the position of the stop can be reasonably controlled, which is not only beneficial to the miniaturization design of the optical lens, but also can control the number of light rays passing through the stop, thereby being beneficial to adjusting the brightness and contrast of the optical lens.

[0129] In some embodiments, the optical lens 100 satisfies a relationship 110deg<FOV*F / IMGH<120deg. By reasonably controlling the mutual relationship between the total effective focal length of the optical lens, the maximum field of view angle of the optical lens 100, and the image height corresponding to the maximum field of view angle of the optical lens 100, the large-angle resolution of the optical lens 100 can be realized, which is helpful to improve the overall effect of the optical lens 100 while satisfying the small distortion and large field of view angle of the optical lens 100.

[0130] In some embodiments, the optical lens 100 satisfies a relationship 3<CTMAX / CTMIN<4.2, where CTMAX is the maximum thickness of the first lens to the seventh lens on the optical axis, and CTMIN is the minimum thickness of the first lens L1 to the seventh lens L7 on the optical axis. By controlling the ratio between the maximum thickness and the minimum thickness of the seven lenses, the thickness of each lens can be controlled, which is beneficial to the miniaturization design of the optical lens in the case of assembling the optical lens.

[0131] The optical lens 100 of the present embodiment will be described in detail below in combination with specific parameters.

[0132] Embodiment 1

[0133] The structural schematic diagram of the optical lens 100 disclosed by Embodiment 1 of the present application is shown in Figure 1 The optical lens 100 includes, in order from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a stop STO, 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.

[0134] In embodiment 1, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, the sixth lens L6 has negative refractive power, and the seventh lens L7 has positive refractive power.

[0135] In embodiment 1, the object side surface and the image side surface of the first lens L1 are convex and concave at the near optical axis, respectively, the object side surface and the image side surface of the second lens L2 are convex and concave at the near optical axis, respectively, the object side surface and the image side surface of the third lens L3 are concave and convex at the near optical axis, respectively, the object side surface and the image side surface of the fourth lens L4 are both convex at the near optical axis, the object side surface and the image side surface of the fifth lens L5 are both convex at the near optical axis, the object side surface and the image side surface of the sixth lens L6 are concave and convex at the near optical axis, respectively, and the object side surface and the image side surface of the seventh lens L7 are both convex at the near optical axis.

[0136] For example, the focal length F of the optical lens 100 is 1.6085 mm, the F number FNO of the optical lens 100 is 2.05, and the maximum field of view FOV of the optical lens 100 is 200 degrees. Other parameters of the optical lens 100 are shown in Table 1 below. In Table 1, the elements of the optical lens 100 are arranged in the order from top to bottom according to the order of the elements in Table 1 from the object side to the image side along the optical axis of the optical lens 100. In the same lens, the surface with a smaller surface serial number is the object side surface of the lens, and the surface with a larger surface serial number is the image side surface of the lens, for example, the surface serial numbers 1 and 2 correspond to the object side surface S1 and the image side surface S2 of the first lens L1, respectively. The Y radius in Table 1 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. The first value in the “thickness” parameter column of the lens is the thickness of the lens at the optical axis, 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. The value in the “thickness” parameter column of the stop STO is the distance from the vertex of the stop STO to the vertex of the next surface at the optical axis. By default, the direction from the object side surface of the first lens L1 to the image side surface of the last lens is the positive direction of the optical axis. 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, thickness, and focal length in Table 1 are mm. The refractive index, Abbe number, and the like in Table 1 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 546 nm.

[0137] In embodiment 1, the object side surface and the image side surface of the seventh lens L7 are both aspheric surfaces, and the surface type x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

[0138]

[0139] wherein x is the sag of the aspherical surface at a position along the optical axis at a height h, c is the curvature of the aspherical surface at the optical axis, c = 1 / Y (i.e., the paraxial curvature c is the inverse of the radius of curvature Y in Table 1 below), K is the conic constant, and Ai is the correction coefficient of the aspherical surface of the i-th order. Table 2 below shows the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surface of the seventh lens L7.

[0140] Table 1

[0141]

[0142]

[0143] Table 2

[0144]

[0145] See Figure 2 (A) in FIG. 10, Figure 2 (A) in FIG. 10 is a spherical aberration curve of the optical lens 100 in Example 1 at wavelengths of 656 nm, 588 nm, 546 nm, 486 nm, 436 nm, and 410 nm. The abscissa along the X-axis represents the focal shift in mm, and the ordinate along the Y-axis represents the normalized field of view. It can be seen from Figure 2 (A) in FIG. 10 that the spherical aberration of the optical lens 100 in Example 1 is better, which indicates that the imaging quality of the optical lens 100 in this embodiment is better.

[0146] See Figure 2 (B) in FIG. 11, Figure 2 (B) in FIG. 11 is a ray aberration diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The abscissa along the X-axis represents the focal shift in mm, and the ordinate along the Y-axis represents the field of view angle in deg. T in the field curvature diagram represents the curvature of the imaging surface IMG in the meridional direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. It can be seen from Figure 2 (B) in FIG. 11 that at this wavelength, the field curvature of the optical lens 100 is small, and the field curvature and the aberration of each field of view are well corrected, and the center and the edge of the field of view have clear imaging, that is, the aberration of the optical lens 100 is well compensated.

[0147] See Figure 2 (C) in FIG. 12, Figure 2 (C) in FIG. 12 is a distortion curve of the optical lens 100 in Example 1 at a wavelength of 546 nm. The abscissa along the X-axis represents the distortion, and the ordinate along the Y-axis represents the field of view angle in deg. It can be seen from Figure 2As can be seen from the curve (C) of the distortion in FIG. 10B, at this wavelength, the image distortion caused by the main light beam is small, and the distortion of the optical lens 100 is well corrected.

[0148] Embodiment 2

[0149] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 2 of the present application is shown in FIG. 10A. Figure 3 As shown in FIG. 10A, the optical lens 100 comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a diaphragm STO, 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.

[0150] In Embodiment 2, the refractive powers of the lenses are the same as those in Embodiment 1, except that the third lens L3 has a positive refractive power.

[0151] In Embodiment 2, the surface shapes of the object side and the image side of the lenses are the same as those in Embodiment 1, except that the image side surface of the fourth lens is concave at the vicinity of the optical axis.

[0152] The other parameters of the optical lens 100 are given in Table 3 below. And the definitions of the parameters can be obtained from the foregoing description of the embodiments, which will not be repeated here.

[0153] Table 3

[0154]

[0155] In Embodiment 2, the high-order term coefficients of the aspherical surfaces used in Embodiment 2 are given in Table 4, wherein each aspherical surface can be defined by the formula given in Embodiment 1.

[0156] Table 4

[0157]

[0158] Please refer to Figure 4 , from Figure 4 the curve (A) of the spherical aberration, the curve (B) of the ray fan, and the curve (C) of the distortion in FIG. 10B, it can be seen that the spherical aberration, the fan, and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in Figure 4 (A), Figure 4 (B), and Figure 4 (C) can refer to the descriptions of the wavelengths corresponding to the curves in Figure 2 (A), Figure 2 (B), Figure 2 (C) in Embodiment 1, which will not be repeated here.

[0159] Embodiment 3

[0160] The structural diagram of the optical lens 100 disclosed in Example 3 of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0161] In Example 3, except that the third lens L3 has positive refractive power, the refractive powers of other lenses are the same as those in Example 1.

[0162] In Example 3, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side and image-side surface shapes of the other lenses are the same as those in Example 1.

[0163] Other parameters of the optical lens 100 are given in the following Table 5. The definitions of the parameters can be derived from the description of the above embodiments and are not repeated here.

[0164] Table 5

[0165]

[0166] In Example 3, Table 6 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 3, wherein each aspheric surface shape can be defined by the formula given in Example 1.

[0167] Table 6

[0168]

[0169]

[0170] See also Figure 6 ,Depend on Figure 6 As can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram, the 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 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0171] Example 4

[0172] The structural diagram of the optical lens 100 disclosed in Example 4 of the present application is as follows Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0173] In Example 4, except that the third lens L3 has positive refractive power, the refractive powers of other lenses are the same as those in Example 1.

[0174] In Example 4, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side and image-side surface shapes of the other lenses are the same as those in Example 1.

[0175] Other parameters of the optical lens 100 are given in the following Table 7. The definitions of the parameters can be derived from the description of the above embodiments and are not repeated here.

[0176] Table 7

[0177]

[0178]

[0179] In Example 4, Table 8 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 4, wherein each aspheric surface shape can be defined by the formula given in Example 1.

[0180] Table 8

[0181]

[0182] See also Figure 8 ,Depend on Figure 8 As can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram, the 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 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0183] Example 5

[0184] See Figure 9The 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 seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0185] In Example 5, except that the third lens L3 has positive refractive power, the refractive powers of other lenses are the same as those in Example 1.

[0186] In Example 5, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side and image-side surface shapes of the other lenses are the same as those in Example 1.

[0187] The structural diagram of the optical lens 100 disclosed in Example 5 of the present application is as follows: Figure 9 As shown, other parameters of the optical lens 100 are given in the following Table 9. The definitions of each parameter can be derived from the description of the above embodiments and are not repeated here.

[0188] Table 9

[0189]

[0190]

[0191] In Example 5, Table 10 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 5, wherein each aspheric surface shape can be defined by the formula given in Example 1.

[0192] Table 10

[0193]

[0194] See also Figure 10 ,Depend on Figure 10 As can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram, the 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 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0195] Example 6

[0196] See Figure 11The optical lens 100 comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an infrared filter IR and a cover glass CG.

[0197] In Embodiment 6, the refractive powers of the lenses are the same as those in Embodiment 1 except that the third lens L3 has a positive refractive power.

[0198] In Embodiment 6, the surface shapes of the object side and the image side of the lenses are the same as those in Embodiment 1 except that the image side surface of the fourth lens is concave at the vicinity of the optical axis.

[0199] The structure diagram of the optical lens 100 disclosed in Embodiment 6 is shown in FIG. 6. Figure 11 The other parameters of the optical lens 100 are given in Table 11 below. The definitions of the parameters can be obtained from the descriptions of the previous embodiments and are not repeated here.

[0200] Table 11

[0201]

[0202]

[0203] In Embodiment 6, the high-order term coefficients of the aspherical surfaces used in Embodiment 6 are given in Table 12. The aspherical surface shapes can be defined by the formula given in Embodiment 1.

[0204] Table 12

[0205]

[0206] As shown in FIG. 6, the spherical aberration curve (A), the ray fan curve (B) and the distortion curve (C) of the optical lens 100 are shown in FIG. 6. Figure 12 Figure 12 It can be seen from the spherical aberration curve (A), the ray fan curve (B) and the distortion curve (C) of the optical lens 100 that the spherical aberration, the ray fan and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), (B) and (C) can refer to the descriptions of the wavelengths corresponding to the curves in (A), (B) and (C) in Embodiment 1, which are not repeated here. Figure 12 Figure 12 Figure 12 Figure 2 Figure 2 Figure 2

[0207] Embodiment 7

[0208] As shown in FIG. 7, the spherical aberration curve (A), the ray fan curve (B) and the distortion curve (C) of the optical lens 100 are shown in FIG. 7. Figure 13 ​​​​​​​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 seventh lens L7, a filter IR and a protective glass CG, which are arranged in sequence from the object side to the image side along the optical axis.

[0209] In Example 7, the refractive powers of the first lens L1 to the seventh lens L7 are the same as those in Example 1.

[0210] In Example 7, except that the image-side surface of the fourth lens element is concave at the near optical axis and the image-side surface of the seventh lens element L7 is concave at the near optical axis, the object-side and image-side surface shapes of the other lenses are the same as those in Example 1.

[0211] The structural diagram of the optical lens 100 disclosed in Example 7 of the present application is as follows: Figure 13 As shown, other parameters of the optical lens 100 are given in the following Table 13. The definitions of the various parameters can be derived from the description of the above embodiments and are not repeated here.

[0212] Table 13

[0213]

[0214]

[0215] In Example 7, Table 14 gives the high-order coefficients that can be used for each aspheric mirror surface in Example 7, wherein each aspheric surface shape can be defined by the formula given in Example 1.

[0216] Table 14

[0217]

[0218] See also Figure 14 ,Depend on Figure 14 As can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram, the 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 14 (A) Figure 14 (B) and Figure 14 The wavelengths corresponding to the curves in (C) can be referred to in Example 1. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0219] Example 8

[0220] See Figure 15The optical lens 100 comprises, in sequence from the object side to the image side along the optical axis, a first lens L1, a second lens L2, a third lens L3, a diaphragm STO, 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.

[0221] In embodiment 8, the refractive power of the first lens L1 to the seventh lens L7 is the same as that of embodiment 1.

[0222] In embodiment 8, the surface shape of the object side surface and the image side surface of each lens is the same as that of embodiment 1, except that the image side surface of the fourth lens is concave at the vicinity of the optical axis.

[0223] The structural schematic diagram of the optical lens 100 disclosed in embodiment 8 is shown in Figure 15 The other parameters of the optical lens 100 are given in Table 15 below. The definitions of the parameters can be obtained from the foregoing description of the embodiments, which will not be repeated here.

[0224] Table 15

[0225]

[0226] In embodiment 8, the high-order term coefficients of the aspherical surfaces used in embodiment 8 are given in Table 16. The aspherical surface shape can be defined by the formula given in embodiment 1.

[0227] Table 16

[0228]

[0229] Referring to Figure 16 , it can be seen from the (A) spherical aberration curve, (B) light ray astigmatism curve and (C) distortion curve in Figure 16 that the spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in (A), Figure 16 (B) and (C) can refer to the descriptions of the wavelengths corresponding to the curves in (A), Figure 16 (B) and (C) in embodiment 1, which will not be repeated here. Figure 16 Figure 2 Figure 2 Figure 2

[0230] Referring to Table 17, Table 17 is a summary of the ratios of the relationships in embodiments 1 to 8 of the present application.

[0231] Table 17

[0232] ​​​​

[0233]

[0234] Please refer to Figure 17 The present application also discloses an image taking module 200, which comprises an image sensor 201 and the optical lens 100 as described in any one of the above embodiments 1 to 8, and the image sensor 201 is arranged on the image side of the optical lens 100. The photosensitive surface of the image sensor 201 is located at the imaging surface IMG of the optical lens 100, and the light rays of an object incident on the photosensitive surface through the lens can be converted into an electrical signal of an image. The image sensor 201 can be a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD). The image taking module 200 can be an imaging module integrated on a terminal device 300, or can be a separate lens. It can be understood that the image taking module 200 with the above optical lens 100 has all the technical effects of the optical lens 100, that is, the image taking module 200 can meet the design requirements of high-pixel imaging while meeting the miniaturized design of the optical lens 100. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be described here.

[0235] The present application also discloses a terminal device 300, which comprises a device main body 301 and the above image taking module 200, and the image taking module 200 is arranged on the device main body 301. The terminal device 300 can include but is not limited to a mobile phone, a tablet computer, a notebook computer, a smart watch, a vehicle-mounted device, a drone, a monitor, etc. Please refer to Figure 18 The terminal device 300 can be applied to a vehicle, and at this time, the device main body 301 can be a vehicle body, and the image taking module 200 can be arranged on the vehicle body, for example, can be arranged inside or outside the vehicle body.

[0236] It can be understood that the terminal device 300 with the above image taking module 200 also has all the technical effects of the optical lens 100. That is, the terminal device 300 can meet the design requirements of high-pixel imaging while meeting the miniaturized design of the optical lens 100. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they will not be described here.

[0237] The optical lens, the image capturing module and the terminal device disclosed in the embodiments of the present application are described in detail, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the optical lens, the image capturing module and the terminal device of the present application and the core idea thereof. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An optical lens, characterized in that: There are a total of seven lenses with refractive power, and the lenses include a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged in sequence from the object side to the image side along the optical axis; The first lens has negative refractive power, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens has negative refractive power, the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; The third lens has refractive power, the object side surface of the third lens is concave near the optical axis, and the image side surface of the third lens is convex near the optical axis; The fourth lens has positive refractive power, and the object side surface of the fourth lens is convex near the optical axis; The fifth lens has positive refractive power, and both the object side surface and the image side surface of the fifth lens are convex near the optical axis; The sixth lens has negative refractive power, the object side surface of the sixth lens is concave near the optical axis, and the image side surface of the sixth lens is convex near the optical axis; The seventh lens has positive refractive power, and the object side surface of the seventh lens is convex near the optical axis; The optical lens satisfies the following relationships: 190deg < FOV < 210deg, 1.65 < IMGH / F < 1.8, and -5 < CT3 / SAGS5 < -2; Where, FOV is the maximum field angle of the optical lens, IMGH is half of the image height corresponding to the maximum field angle of the optical lens, F is the focal length of the optical lens; CT3 is the thickness of the third lens on the optical axis, and SAGS5 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side surface of the third lens to the intersection of the object side surface of the third lens and the optical axis.

2. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 7 < TTL / IMGH < 7.3, and / or, 12 < TTL / F < 13, and / or, CT45 / CT34 > 2; Where, TTL is the distance on the optical axis from the object side surface of the first lens to the imaging surface of the optical lens, CT45 is the distance on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens, and CT34 is the distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens.

3. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: -6 < F1 / F < -4, and / or, 3 < F4 / F < 8, and / or, 1 < F1 / F2 < 3; Where, F1 is the focal length of the first lens, F4 is the fourth lens, and F2 is the focal length of the second lens.

4. The optical lens according to claim 1, wherein: The optical lens satisfies the following relationships: 1.5 < SD1 / SD3 < 2.1, and / or, Where, SD1 is the maximum effective semi-aperture of the object side of the first lens, SD3 is the maximum effective semi-aperture of the object side of the second lens, SD8 is the maximum effective semi-aperture of the image side of the fourth lens, SD9 is the maximum effective semi-aperture of the object side of the fifth lens, R10 is the radius of curvature of the image side of the fifth lens on the optical axis, and SD10 is the maximum effective semi-aperture of the image side of the fifth lens.

5. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 1.2 < CT5 / ET5 < 2.1, and / or, 1.2 < CT7 / ET7 < 1.5; Where, CT5 is the thickness of the fifth lens on the optical axis, ET5 is the distance on the optical axis from the maximum effective aperture of the object side of the fifth lens to the maximum effective aperture of the image side of the fifth lens, CT7 is the thickness of the seventh lens on the optical axis, and ET7 is the distance on the optical axis from the maximum effective aperture of the object side of the seventh lens to the maximum effective aperture of the image side of the seventh lens.

6. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 1.2 < R6 / R5 < 1.4, and / or, -2 < R9 / R10 < -1, and / or, R11 / R12 < 0.5; Where, R6 is the radius of curvature of the image side of the third lens on the optical axis, R5 is the radius of curvature of the object side of the third lens on the optical axis, R9 is the radius of curvature of the object side of the fifth lens on the optical axis, R10 is the radius of curvature of the image side of the fifth lens on the optical axis, R11 is the radius of curvature of the object side of the sixth lens on the optical axis, and R12 is the radius of curvature of the image side of the sixth lens on the optical axis.

7. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: -10 < F1 / CT1 < -5, and / or, F7 / CT7 < 5, and / or, 0.9 < (CT1 + CT2) / CT12 < 1.3; Where, F1 is the focal length of the first lens, CT1 is the thickness of the first lens on the optical axis, F7 is the focal length of the seventh lens, CT7 is the thickness of the seventh lens on the optical axis, CT2 is the thickness of the second lens on the optical axis, and CT12 is the distance on the optical axis from the image side of the first lens to the object side of the second lens.

8. The optical lens according to claim 1, wherein: The optical lens satisfies the following relational expressions: 0.52 < DOS / TTL < 0.65, and / or, 110deg < FOV*F / IMGH < 120deg, and / or, 3 < CTMAX / CTMIN < 4.2; Where, DOS is the distance on the optical axis from the object side of the first lens to the diaphragm, TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens, CTMAX is the largest thickness among the first lens to the seventh lens on the optical axis, and CTMIN is the smallest thickness among the first lens to the seventh lens on the optical axis.

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

10. A terminal device, characterized in that: It comprises a device body and the imaging module as claimed in claim 9, wherein the imaging module is arranged on the device body.

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