Optical lens, image capturing module and terminal equipment

Abstract

The invention discloses an optical lens, an image capturing module and a terminal device, the optical lens comprises seven lenses with refractive power, the first lens has negative refractive power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens element with negative refractive power has a convex object-side surface and a concave image-side surface. The third lens element with refractive power has a concave object-side surface and a convex image-side surface, respectively. The fourth lens element with positive refractive power has a convex object-side surface. The fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface. The sixth lens element with negative refractive power has a concave object-side surface and a convex image-side surface, and the seventh lens element with positive refractive power has a convex object-side surface. The optical lens satisfies the following relational expression: 190default; a FOVlt; 210deg and 1.65 lt are included in the formula I; iMGH / Flt; 1.8). According to the optical lens, the image capturing module and the terminal equipment, the miniaturization design of the optical lens can be met, meanwhile, the large field angle can be achieved, and meanwhile the imaging quality can be improved.

Description

Technical Field

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

[0002] The vehicle lens is a key component for the automatic driving assistance system to obtain external information. With the rapid development of the automatic driving assistance system, the performance requirements for the front-view optical lens are getting higher and higher. At the same time, as the requirements for night driving in automatic driving gradually increase, the requirements for night vision functions of vehicle lenses are also getting higher and higher. However, the vehicle lenses in the related technologies have serious aberration problems such as chromatic aberration, astigmatism, and distortion. In addition, the overall size of the vehicle lenses in the related technologies is relatively large, which cannot meet the design requirements of miniaturization and the imaging requirements of a large viewing angle. Summary of the invention

[0003] The present application provides an optical lens, an imaging module and a terminal device, which can satisfy the miniaturization design of the optical lens while having a large field of view and improving the imaging quality.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, an embodiment of the present application discloses an optical lens, comprising seven lenses with refractive power, wherein 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;

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

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

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

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

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

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

[0012] The optical lens satisfies the following relationship:

[0013] 190° < FOV < 210° 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 from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis, CT45 is the distance from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis, and CT34 is the distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis.

[0019] When the optical lens satisfies the relationship 7 < TTL / IMGH < 7.3, it can achieve large image plane imaging while taking into account the miniaturized design of the optical lens, which is beneficial to improving the imaging clarity of the optical lens and further beneficial to improving the imaging quality of the optical lens.

[0020] When the optical lens satisfies the relationship 12 < TTL / F < 13, it can achieve the miniaturized design of the optical lens while taking into account the wide-angle characteristics of the optical lens.

[0021] When the optical lens satisfies the relationship CT45 / CT34 > 2, it 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 beneficial to the miniaturized design of the optical lens. Especially when the aperture stop is located between the fourth lens and the fifth lens, the reasonable distance can also enable the light to enter the fourth lens and the fifth lens smoothly from the third lens, thereby being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, 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, and 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 made reasonable, so that light can enter the optical lens more focused, which is 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 powers of the first lens and the second lens are reasonable. Furthermore, it is conducive to light entering the second lens from the first lens more smoothly, thereby being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, improving the imaging quality.

[0027] In some optional embodiments, the optical lens satisfies the relational expression:

[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 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 curvature radius of the image side of the fifth lens at the optical axis, and SD10 is the maximum effective semi-aperture of the image side of the fifth lens.

[0030] When the optical lens satisfies the relational expression 1.5 < SD1 / SD3 < 2.1, the ratio of the maximum effective semi-aperture of the object side of the first lens and the maximum effective semi-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 smooth. Furthermore, it is convenient for light to enter the second lens through the first lens, and then it is possible to control the trend of light.

[0031] When the optical lens satisfies the relational expression 1.1 < SD3 / IMGH < 1.4, the maximum effective semi-aperture of the object side of the second lens can be roughly 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 then large image surface imaging can be achieved.

[0032] When the optical lens satisfies the relationship 0.9 < SD8 / SD9 < 1.2, it can control the maximum effective semi-aperture of the image side of the fourth lens and the object side of the fifth lens, so that the transition between the fourth lens and the fifth lens is gentle, reducing the step difference between the two. Furthermore, it is beneficial for light to enter the fifth lens smoothly, beneficial for depressing the incident angle of light after passing through the diaphragm, enabling more light to enter the optical lens on the image side, and improving the illuminance of the optical lens.

[0033] When the optical lens satisfies the relationship -3 < R10 / SD10 < -1, it can reasonably control the surface shape of the image side of the fifth lens, so that the fifth lens is not overly curved, facilitating the processing of the fifth lens.

[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] Wherein, CT3 is the thickness of the third lens on the optical axis, SAGS5 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis, 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.

[0037] Since the third lens is a concave-convex lens, when the optical lens satisfies the relationship -5 < CT3 / SAGS5 < -2, it can reasonably control the thickness of the third lens, and at the same time can take into account the surface shape design of the third lens, avoiding the situation that the third lens has insufficient thickness due to excessive curvature and is not conducive to forming, or has excessive thickness due to insufficient curvature and is not conducive to the miniaturization design of the optical lens.

[0038] When the optical lens satisfies the relationships 1.2 < CT5 / ET5 < 2.1 and 1.2 < CT7 / ET7 < 1.5, it can reasonably control the thickness ratio of each lens, thereby optimizing the surface shape of each lens, being beneficial for the effective convergence of large-angle incident light, and enabling the light passing through the corresponding lens to have a small deflection angle, so as to reduce the generation of stray light, and further ensure good imaging performance.

[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 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.

[0042] When the optical lens satisfies the relation 1.2 < R6 / R5 < 1.4, by reasonably controlling the radii of curvature of the image side and the object side of the third lens on the optical axis, the incident light refracted by the first lens and the second lens can be effectively collected and compressed, so that the light smoothly transitions to the subsequent optical lens, reducing aberration and improving the imaging quality of the optical lens.

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

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

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

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

[0047] Wherein, 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.

[0048] When the optical lens satisfies the relations -10 < F1 / CT1 < -5 and F7 / CT7 < 5, the relationship between the focal length and the thickness of each lens can be reasonably restricted, so as to facilitate aberration correction and improve the assembly yield of the optical lens.

[0049] The optical lens satisfies the relationship 0.9 < (CT1 + CT2) / CT12 < 1.3, which can make the ratio of the sum of the thicknesses of the first lens and the second lens on the optical axis to the distance between the first lens and the second lens on the optical axis reasonable, making the assembly of the first lens and the second lens more compact, and thus facilitating the miniaturized 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 lens with the largest thickness on the optical axis among the first lens to the seventh lens, and CTMIN is the lens with the smallest thickness on the optical axis among the first lens to the seventh lens.

[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 miniaturized design of the optical lens, but also controlling the number of light rays passing through the diaphragm, and thus being beneficial to adjusting the brightness and contrast of the optical lens.

[0054] The optical lens satisfies the relationship 110deg < FOV*F / IMGH < 120deg. 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, the large-angle resolution of the optical lens can be achieved, which helps to meet the small distortion and large field of view angle of the optical lens while improving the overall effect of the optical lens.

[0055] The optical lens satisfies the relationship 3 < CTMAX / CTMIN < 4.2. By controlling the ratio of the lens with the largest thickness to the lens with the smallest thickness among the seven lenses, the thickness of each lens can be controlled, and in the case of assembling the optical lens, it is beneficial to the miniaturized design of the optical lens.

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

[0057] In a third aspect, the present application discloses a terminal device, including a device body and an imaging module as described in the second aspect above, and the imaging module is disposed on the device body.

[0058] Compared with the related art, the beneficial effects of the present application are as follows:

[0059] In the optical lens provided by the present application, in order to meet the requirements of miniaturized design of the optical lens, large field of view, and small distortion, the first lens has a negative refractive power. The object side and the image side of the first lens are convex and concave respectively near the optical axis, so that the first lens is formed into a convex-concave lens, which can effectively collect incident light with a large field of view, enabling more light to enter the optical lens and endowing the optical lens with a large field of view. The second lens also has a negative refractive power. Its object side and image side are convex and concave respectively near the optical axis, which can collect the light coming from the first lens and at the same time make the light enter the optical lens smoothly, thereby being able to correct the distortion of the optical lens and reduce the aberration generated by the optical lens, improving the imaging quality. The third lens has a refractive power. With the design that its object side and image side are concave and convex respectively near the optical axis, it is beneficial to correct the field curvature of the optical lens and at the same time can collect and compress the light, enabling the light to transition smoothly to the subsequent lens; the fourth lens has a positive refractive power. With the object side of the fourth lens being convex near the optical axis, it is beneficial to correct the aberration of the optical lens and at the same time can reduce the incident angle of the light after passing through the diaphragm, enabling more light to enter the optical lens. The fifth lens has a positive refractive power, and both the object side and the image side are convex near the optical axis, and the sixth lens has a negative refractive power, with its object side being concave and its image side being convex near the optical axis. Thus, the fifth lens and the sixth lens can cooperate to help eliminate chromatic aberration and at the same time correct the astigmatism of the optical lens, improving the imaging quality of the optical lens. The seventh lens has a positive refractive power. With the design that the object side of the seventh lens is convex near the optical axis, it can converge the light, reduce the total length of the optical lens, and further realize the miniaturized 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 achieve wide-angle imaging. Moreover, the optical lens satisfies the relationship 1.65 < IMGH / F < 1.8, which can meet the requirements of a large target surface while satisfying the adaptation of the optical lens to a large-sized imaging surface and the miniaturization of the optical lens. Description of the Drawings

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 is a schematic structural diagram of the optical lens disclosed in Example 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 in Example 1 of the present application;

[0064] Figure 3 is a schematic structural diagram of the optical lens disclosed in Example 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 in Example 2 of the present application;

[0066] Figure 5 is a schematic diagram of the structure of the optical lens disclosed in Example 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 in Example 3 of the present application;

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

[0070] Fig. 9 is a schematic structural diagram of the optical lens disclosed in Example 5 of the present application;

[0071] Fig.10 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in Example 5 of the present application;

[0072] Fig.11 is a schematic structural diagram of the optical lens disclosed in Example 6 of the present application;

[0073] Fig.12 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in Example 6 of the present application;

[0074] Fig.13 is a schematic structural diagram of an optical lens disclosed in Example 7 of the present application;

[0075] Fig.14 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in Example 7 of the present application;

[0076] Fig.15 is a schematic structural diagram of the optical lens disclosed in Example 8 of the present application;

[0077] Fig.16 is a spherical aberration diagram, an astigmatism curve diagram, and a distortion curve diagram of the optical lens disclosed in Example 8 of the present application;

[0078] Fig.17 It is a structural schematic diagram of the imaging module disclosed in this application;

[0079] Fig.18 It is a structural schematic diagram of the terminal device disclosed in this application applied to a car. DETAILED DESCRIPTION

[0080] 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.

[0081] In the present invention, the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0082] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0083] In addition, the terms "disposed" and "set at" should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0084] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may 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 specified, "plurality" means two or more.

[0085] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0086] See also Figure 1 The present application discloses an optical lens 100, which includes 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, which are arranged in sequence from the object side to the image side along the optical axis. When imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface IMG of the optical lens 100.

[0087] In some embodiments, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power or 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.

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

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

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

[0091] In some embodiments, the optical lens 100 may further include an aperture STO, which is disposed between the fourth lens L4 and the fifth lens L5, and a central aperture STO is adopted, which is beneficial to the aberration correction of the optical lens 100. Of course, as other examples, the aperture STO may also be disposed between other lenses, for example, between the second lens L2 and the third lens L3, or between the first lens L1 and the second lens L2, and may be disposed specifically according to actual needs, and this embodiment does not specifically limit this.

[0092] In some embodiments, the optical lens 100 further includes a filter IR, which is 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 filter IR may be an infrared cut-off filter, so that light of other bands such as infrared light can be filtered out, and only visible light can be allowed to pass through, so that the imaging is more in line with the visual experience of the human eye. Of course, the filter IR may also be an infrared bandpass filter, so that light of other bands such as visible light can be filtered out, and only infrared light can be allowed to pass through, and the imaging quality can be improved by filtering light of other bands such as visible light; and the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also form an image in a dim environment and other special application scenarios and can obtain a better imaging effect. Preferably, the filter IR can be made of glass. Of course, in other embodiments, the filter IR can also be made of optical glass coating, or a filter IR of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[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 play a protective role.

[0094] In some embodiments, the optical lens 100 satisfies the relation 190deg < FOV < 210deg, where FOV is the maximum field of view angle of the optical lens 100. When the optical lens 100 satisfies this relation, it can have a large field of view angle, so as to achieve wide-angle imaging. Preferably, this relation 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 the relation FNO < 2.1, where FNO is the f-number of the optical lens 100. In this way, the optical lens 100 has the characteristic of a large aperture, which can increase the amount of incident light of the optical lens 100, so that the optical lens 100 can also be applicable to scenarios at night or with low ambient brightness (such as rainy days), and further meet the imaging requirements in dark environments.

[0096] In some embodiments, the optical lens 100 satisfies the relation 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, a reasonable field of view angle and f-number are provided for the optical lens 100, which can balance the design difficulty and the requirement of the field of view angle. At the same time, the aperture changes within a reasonable range, providing a combined effect of a large viewing angle and a large aperture, and meeting the characteristics of the optical lens 100 having a large aperture, high relative illuminance and small distortion.

[0097] In some embodiments, the optical lens 100 satisfies the relation 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 this relation is satisfied, it can meet the requirements of the optical lens 100 for adapting to a large-size imaging surface and miniaturization of the optical lens 100, and at the same time enable the optical lens 100 to meet the requirements of a large target surface.

[0098] In some embodiments, the optical lens 100 satisfies the relation 7 < TTL / IMGH < 7.3, where TTL is the distance from the object side surface 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 this relation, it can balance the miniaturization design of the optical lens 100 and at the same time achieve large image surface imaging, which is beneficial to improving the imaging clarity of the optical lens 100, and further beneficial to improving the imaging quality of the optical lens 100.

[0099] In some embodiments, the optical lens 100 satisfies the relation 12 < TTL / F < 13. Here, TTL is the distance from the object side surface S1 of the first lens L1 to the imaging surface of the optical lens 100 on the optical axis, and F is the focal length of the optical lens 100. When the optical lens 100 satisfies this relation, it can achieve miniaturization of the optical lens 100 while enabling the optical lens 100 to have a wide-angle characteristic.

[0100] In some embodiments, the optical lens 100 satisfies the relation CT45 / CT34 > 2, where CT45 is the distance on the optical axis from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5, and CT34 is the distance on the optical axis from the image side surface of the third lens L3 to the object side surface of the fourth lens L4. When this relation is satisfied, the spacing between the fourth lens L4 and the fifth lens L5 and the spacing between the third lens L3 and the fourth lens L4 can be reasonably controlled, so that the arrangement spacing among the third lens L3, the fourth lens L4, and the fifth lens L5 is appropriate, which is beneficial to the miniaturization design of the optical lens 100. Especially when the aperture stop is located between the fourth lens and the fifth lens, the reasonable spacing can also enable light to smoothly enter from the third lens L3 into the fourth lens L4 and the fifth lens L5, thereby being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality. Preferably, this relation can further satisfy 3 < CT45 / CT34 < 13.

[0101] In some embodiments, the optical lens 100 satisfies the relation -6 < F1 / F < -4. Here, F1 is the focal length of the first lens L1. When this relation is satisfied, the focal length of the first lens L1 can be reasonably allocated, enabling the first lens L1 to provide negative refractive power, having a reasonable refractive power distribution for the first lens L1, being beneficial to light convergence, and at the same time helping to reduce the overall spherical aberration, chromatic aberration, and distortion of the first lens L1 to reasonable positions, reducing the design difficulty of the subsequent lenses, while improving the overall resolving power of the optical lens 100 and strengthening the peripheral aberration correction of the optical lens 100. In addition, it is also beneficial to the size compression of the first lens L1, thereby helping to form a small-sized optical lens 100.

[0102] In some embodiments, the optical lens 100 satisfies the relation -4 < F2 / F < -2, where F2 is the 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 allocated, the angle of the light incident from the first lens L1 can be reduced, and at the same time it is beneficial 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 the relation |F3 / F| > 30, where F3 is the focal length of the third lens L3. When this relation is satisfied, the focal length of the third lens L3 can be reasonably allocated, so that the third lens L3 can provide a positive refractive power to the optical lens 100, thereby being able to provide better light converging ability to the optical lens 100. At the same time, it can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0104] In some embodiments, the optical lens 100 satisfies the relation 3 < F4 / F < 8, where F4 is the focal length of the fourth lens L4. When this relation is satisfied, the focal length of the fourth lens L4 can be reasonably allocated, so that the fourth lens L4 can provide a positive refractive power to the optical lens 100, thereby being able to provide better light converging ability to the optical lens 100. At the same time, it can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0105] In some embodiments, the optical lens 100 satisfies the relation 1 < F5 / F < 3, where F5 is the focal length of the fifth lens L5. When this relation is satisfied, the refractive power of the fifth lens L5 can be reasonably allocated, thereby being able to provide better light converging ability to the optical lens 100. At the same time, it can correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0106] In some embodiments, the optical lens 100 satisfies the relation F6 / F < -1.5, where F6 is the focal length of the sixth lens L6. When this relation is satisfied, the focal length of the sixth lens L6 can be reasonably allocated, and the refractive power of the fifth lens can be reasonably allocated, thereby being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, improving the imaging quality of the optical lens 100.

[0107] In some embodiments, the optical lens 100 satisfies the relation 3 < F7 / F < 5, where F7 is the focal length of the seventh lens L7. Since the seventh lens L7 provides positive refractive power to the optical lens 100 and provides the main light-gathering ability of the lens group of the optical lens 100, therefore, 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 optical power of the optical lens 100 and shorten the overall optical length of the optical lens 100. When exceeding the upper limit of the relation, the focal length of the seventh lens L7 becomes larger, the light is deflected greatly, and it is easy to increase the aberration of the off-axis field of view. When lower than the lower limit of the relation, the focal length of the optical lens 100 is too large, and the overall length of the optical lens 100 is too long, which is not conducive to the miniaturization design of the optical lens 100. Optionally, the relation can further satisfy 4 < F7 / F < 20, in this way, the focal length of the seventh lens L7 is reasonable, due to the miniaturization design of the optical lens 100.

[0108] In some embodiments, the optical lens 100 satisfies the relation 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 further it is beneficial for light to enter the second lens L2 more gently from the first lens L1, thereby being able to correct the distortion of the optical lens 100 and reduce the aberration generated by the optical lens 100, and improve the imaging quality.

[0109] In some embodiments, the optical lens 100 satisfies the relation 1.5 < SD1 / SD3 < 2.1, where SD1 is the maximum effective semi-aperture of the object side surface S1 of the first lens L1, and SD3 is the maximum effective semi-aperture of the object side surface S3 of the second lens L2. When the optical lens 100 satisfies the relation 1.5 < SD1 / SD3 < 2.1, it can reasonably control the ratio of the maximum effective semi-aperture of the object side surface S1 of the first lens L1 to the maximum effective semi-aperture of the object side surface S3 of the second lens L2, so that the transition between the object side surfaces of the first lens L1 and the second lens L2 is relatively gentle, and further it is convenient for light to enter the second lens L2 through the first lens L1, and then it is possible to facilitate the control of the light trend.

[0110] In some embodiments, the optical lens 100 satisfies the relation 1.1 < SD3 / IMGH < 1.4. When satisfying this relation, it can make the maximum effective semi-aperture of the object side surface S3 of the second lens L2 roughly match the imaging surface of the optical lens, which is beneficial for more light to enter the imaging surface of the optical lens, and then it is possible to achieve large image surface imaging.

[0111] In some embodiments, the optical lens 100 satisfies the relation 0.9 < SD8 / SD9 < 1.2, where SD8 is the maximum effective semi-aperture of the image side surface S8 of the fourth lens L4, and SD9 is the maximum effective semi-aperture of the object side surface S9 of the fifth lens L5. When this relation is satisfied, the maximum effective semi-apertures of the image side surface of the fourth lens L4 and the object side surface 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 further, it is beneficial for light to enter the fifth lens smoothly, beneficial for depressing the light incident angle after the light passes through the diaphragm, enabling more light to enter the optical lens on the image side, and improving the illuminance of the optical lens.

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

[0113] In some embodiments, the optical lens 100 satisfies the relation -5 < CT3 / SAGS5 < -2, where SAGS5 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side surface S5 of the third lens L3 to the intersection of the object side surface S1 of the first lens L1 and the optical axis (i.e., the sag of the object side surface S5 of the third lens L3), and CT3 is the thickness of the third lens L3 on the optical axis. When this relation is satisfied, the surface shape and the thickness of the third lens L can be reasonably controlled, thereby controlling the overall thickness of the third lens L on the optical axis, making the third lens L thinner and lighter.

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

[0115] In some embodiments, the optical lens 100 satisfies the relation -8 < F2 / CT2 < -4, where CT2 is the thickness of the second lens L2 on the optical axis. When this relation is satisfied, the refractive power and thickness of the second lens L2 can be reasonably configured, so that the incident angle of light in the optical lens 100 can be effectively controlled, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and thus it is beneficial to improve the imaging quality of the optical lens 100.

[0116] In some embodiments, the optical lens 100 satisfies the relation |F3 / CT3| > 20. When this relation is satisfied, the refractive power and thickness of the third lens L3 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and thus it is beneficial to improve the imaging quality of the optical lens 100.

[0117] In some embodiments, the optical lens 100 satisfies the relation 2 < F4 / CT4 < 6, where CT4 is the thickness of the fourth lens L4 on the optical axis. When this relation is satisfied, the refractive power and thickness of the fourth lens L4 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and thus it is beneficial to improve the imaging quality of the optical lens 100.

[0118] In some embodiments, the optical lens 100 satisfies the relation 1 < F5 / CT5 < 3, where CT5 is the thickness of the fifth lens L5 on the optical axis. When this relation is satisfied, the refractive power and thickness of the fifth lens L5 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and thus it is beneficial to improve the imaging quality of the optical lens 100.

[0119] In some embodiments, the optical lens 100 satisfies the relation F6 / CT6 < -5, where CT6 is the thickness of the sixth lens L6 on the optical axis. When this relation is satisfied, the refractive power and thickness of the sixth lens L6 can be reasonably configured, so that the light enters the optical lens 100 more gently, the sensitivity of the optical lens 100 can be reduced, it is beneficial to correct the aberration generated by the optical lens 100, and thus it is beneficial to improve the imaging quality of the optical lens 100.

[0120] In some embodiments, the optical lens 100 satisfies the relationship F7 / CT7 < 5, where CT7 is the thickness of the seventh lens L7 on the optical axis. When this 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, reducing the sensitivity of the optical lens 100, which is beneficial to correcting the aberration generated by the optical lens 100, and thus beneficial to improving the imaging quality of the optical lens 100.

[0121] In some embodiments, the optical lens 100 satisfies the relationships 1.2 < CT5 / ET5 < 2.1 and 1.2 < CT7 / ET7 < 1.5, where ET5 is the distance in the optical axis direction 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. ET7 is the distance in the optical axis direction 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. When these relationships are satisfied, the thickness-to-thickness ratios of the respective lenses can be reasonably controlled, thereby optimizing the surface shapes of the respective lenses, which is beneficial to the effective convergence of large-angle incident light, and making the light passing through the corresponding lens have a smaller deflection angle, so that the generation of stray light can be reduced, and thus good imaging performance can be ensured.

[0122] In some embodiments, the optical lens 100 satisfies the relationships 0.8 < CT1 / ET1 < 0.95, 0.4 < CT2 / ET2 < 0.7, 0.9 < CT3 / ET3 < 1, 1.1 < CT4 / ET4 < 1.3, 0.55 < CT6 / ET6 < 0.75. Where ET1 is the distance on the optical axis 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, ET2 is the distance in the optical axis direction 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, ET3 is the distance in the optical axis direction 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, ET4 is the distance in the optical axis direction 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. ET6 is the distance in the optical axis direction 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. When these relationships are satisfied, the surface shapes of the respective lenses can be optimized, so that the generation of stray light can be reduced, and good imaging quality can be achieved.

[0123] In some embodiments, the optical lens 100 satisfies the relation 0.9 < (CT1 + CT2) / CT12 < 1.3, where CT12 is the distance on the optical axis from the image side of the first lens L1 to the object side of the second lens L2. When this relation 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, making the assembly of the first lens L1 and the second lens L2 more compact, and thus facilitating the miniaturized design of the optical lens 100.

[0124] In some embodiments, the optical lens 100 satisfies the relations 2 < R1 / R2 < 3, 2 < R3 / R4 < 6, |R7 / R8| < 1, and |R13 / R14| < 1. Here, R1 is the curvature radius of the object side of the first lens L1 at the optical axis, R2 is the curvature radius of the image side of the first lens L1 at the optical axis. R3 is the curvature radius of the object side of the second lens L2 at the optical axis, R4 is the curvature radius of the image side of the second lens L2 at the optical axis. R7 is the curvature radius of the object side of the fourth lens L4 at the optical axis, R8 is the curvature radius of the image side of the fourth lens L4 at the optical axis. R13 is the curvature radius of the object side of the seventh lens L7 at the optical axis, R14 is the curvature radius of the image side of the seventh lens L7 at the optical axis. When the above relations are satisfied, it is beneficial to control the curvature radii of the object sides and image sides of the respective lenses, so that the surface profiles of the object sides and image sides of the respective lenses are not overly curved, thereby facilitating the control of the shapes of the respective lenses. At the same time, the aberration generated by itself can also be corrected, improving the imaging quality.

[0125] In some embodiments, the optical lens 100 satisfies the relation 1.2 < R6 / R5 < 1.4, where R5 is the curvature radius of the object side of the third lens L3 at the optical axis, and R6 is the curvature radius of the image side of the third lens L3 at the optical axis. By reasonably controlling the curvature radii of the image side and the object side of the third lens L3 at the optical axis, the incident light refracted by the first lens L1 and the second lens L2 can be effectively collected and compressed, enabling the light to smoothly transition to the subsequent optical lenses, reducing aberration, and improving the imaging quality of the optical lens.

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

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

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

[0129] In some embodiments, the optical lens 100 satisfies the 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 achieved, which helps to meet the small distortion and large field of view angle of the optical lens 100 while improving the overall effect of the optical lens 100.

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

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

[0132] Embodiment 1

[0133] The structural schematic diagram of the optical lens 100 disclosed in Embodiment 1 of the present application is as Figure 1 shown. The optical lens 100 includes 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 IR filter, and a protective glass CG, which are sequentially arranged along the optical axis from the object side to the image side.

[0134] In Example 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 Example 1, the object-side surface and the image-side surface of the first lens L1 are convex and concave surfaces at the near optical axis, respectively; the object-side surface and the image-side surface of the second lens L2 are convex and concave surfaces at the near optical axis, respectively; the object-side surface and the image-side surface of the third lens L3 are concave and convex surfaces at the near optical axis, respectively; the object-side surface and the image-side surface of the fourth lens L4 are both convex surfaces at the near optical axis, the object-side surface and the image-side surface of the fifth lens L5 are both convex surfaces at the near optical axis, the object-side surface and the image-side surface of the sixth lens L6 are respectively concave and convex surfaces at the near optical axis, and the object-side surface and the image-side surface of the seventh lens L7 are both convex surfaces at the near optical axis.

[0136] Taking the focal length F=1.6085mm, the aperture number FNO=2.05, and the maximum field angle FOV=200deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in Table 1 below. Among them, the elements along the optical axis of the optical lens 100 from the object side to the image side are arranged in the order of the elements from top to bottom in Table 1. 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 S1 and image side S2 of the first lens L1 respectively. The Y radius in Table 1 is the radius of curvature of the object side or image side of the corresponding surface number at the optical axis. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side of the lens to the next surface on the optical axis. 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) on the optical axis. By default, the direction from the object side of the first lens L1 to the image side of the last lens is the positive direction of the optical axis. When the value is negative, it indicates that the aperture STO is set on the image side of the next surface vertex. If the aperture STO thickness is a positive value, the aperture STO is on the object side of the next surface vertex. It can be understood that the units of the Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 546nm.

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

[0138]

[0139] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the curvature of the aspheric surface at the optical axis, c=1 / Y (i.e., the paraxial curvature c is the reciprocal of the curvature radius Y in Table 1 above); K is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspheric surface of the seventh lens L7.

[0140] Table 1

[0141]

[0142]

[0143] Table 2

[0144]

[0145] See also Figure 2 In (A), Figure 2 (A) is a spherical aberration curve of the optical lens 100 in Example 1 at wavelengths of 656nm, 588nm, 546nm, 486nm, 436nm, and 410nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 As can be seen from (A) in the figure, the spherical aberration value of the optical lens 100 in Example 1 is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0146] See also Figure 2 In (B), Figure 2 (B) is the astigmatism diagram of the optical lens 100 in Example 1 at a wavelength of 546 nm. The horizontal axis along the X-axis direction represents the focus offset in mm, and the vertical axis along the Y-axis direction represents the field angle in degrees. T in the astigmatism curve represents the curvature of the imaging surface IMG in the meridian direction, and S represents the curvature of the imaging surface IMG in the sagittal direction. Figure 2 As can be seen from (B) in the figure, at this wavelength, the field curvature of the optical lens 100 is small, the field curvature and astigmatism of each field of view are well corrected, and the center and edge of the field of view have clear images, that is, the astigmatism of the optical lens 100 is well compensated.

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

[0148] Example 2

[0149] The structural schematic diagram of the optical lens 100 disclosed in Example 2 of the present application is as follows Figure 3 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, 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.

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

[0151] In Example 2, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side surface and image-side surface of other lenses are the same as those of Example 1.

[0152] Other parameters of the optical lens 100 are given in the following Table 3. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0153] Table 3

[0154]

[0155] In Example 2, Table 4 gives the high-order coefficients that can be used for each aspherical mirror surface in Example 2, wherein each aspherical surface type can be defined by the formula given in Example 1.

[0156] Table 4

[0157]

[0158] See also Figure 4 ,from Figure 4 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. Figure 4 (A) Figure 4 (B) and Figure 4 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.

[0159] Example 3

[0160] The structural schematic 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 surface and image-side surface of other lenses are the same as those of Example 1.

[0163] Other parameters of the optical lens 100 are given in the following Table 5. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0164] Table 5

[0165]

[0166] In Example 3, Table 6 gives the high-order coefficients that can be used for each aspherical mirror surface in Example 3, wherein each aspherical 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 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. 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 schematic 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 surface and image-side surface of 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 definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0176] Table 7

[0177]

[0178]

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

[0180] Table 8

[0181]

[0182] See also Figure 8 ,Depend on Figure 8 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. 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 also Fig. 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 surface and image-side surface of other lenses are the same as those of Example 1.

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

[0188] Table 9

[0189]

[0190]

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

[0192] Table 10

[0193]

[0194] See also Fig.10 ,Depend on Fig.10 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. Fig.10 (A) Fig.10 (B) and Fig.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 also Fig.11The 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.

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

[0198] In Example 6, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side surface and image-side surface of other lenses are the same as those of Example 1.

[0199] The structural schematic diagram of the optical lens 100 disclosed in Example 6 of the present application is as follows Fig.11 As shown, other parameters of the optical lens 100 are given in the following Table 11. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0200] Table 11

[0201]

[0202]

[0203] In Example 6, Table 12 gives the high-order coefficients that can be used for each aspherical mirror surface in Example 6, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0204] Table 12

[0205]

[0206] See also Fig.12 ,Depend on Fig.12 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. Fig.12 (A) Fig.12 (B) and Fig.12 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.

[0207] Example 7

[0208] See also Fig.13The 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 surface and image side surface of other lenses are the same as those in Example 1.

[0211] The structural schematic diagram of the optical lens 100 disclosed in Example 7 of the present application is as follows Fig.13 As shown, other parameters of the optical lens 100 are given in the following Table 13. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0212] Table 13

[0213]

[0214]

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

[0216] Table 14

[0217]

[0218] See also Fig.14 ,Depend on Fig.14 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. Fig.14 (A) Fig.14 (B) and Fig.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 also Fig.15The 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.

[0221] In Example 8, the refractive powers of the first lens L1 to the seventh lens L7 are the same as those in Example 1.

[0222] In Example 8, except that the image-side surface of the fourth lens is concave near the optical axis, the object-side surface and image-side surface of other lenses are the same as those of Example 1.

[0223] The structural schematic diagram of the optical lens 100 disclosed in Example 8 of the present application is as follows Fig.15 As shown, other parameters of the optical lens 100 are given in the following Table 15. The definition of each parameter can be obtained from the description of the above embodiments, and will not be repeated here.

[0224] Table 15

[0225]

[0226] In Example 8, Table 16 gives the high-order coefficients that can be used for each aspherical mirror surface in Example 8, wherein each aspherical surface shape can be defined by the formula given in Example 1.

[0227] Table 16

[0228]

[0229] See also Fig.16 ,Depend on Fig.16 It can be seen from the (A) spherical aberration curve, (B) light astigmatism diagram, and (C) distortion curve diagram in FIG. 1 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. Fig.16 (A) Fig.16 (B) and Fig.16 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.

[0230] Please refer to Table 17, which is a summary of the ratios of the various relationship equations in Examples 1 to 8 of the present application.

[0231] Table 17

[0232]

[0233]

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

[0235] The present application also discloses a terminal device 300, which includes a device body 301 and the above-mentioned imaging module 200, and the imaging module 200 is arranged in the device body 301. The terminal device 300 may include but is not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, a vehicle-mounted device, a drone, a monitor, etc. Fig.18 The terminal device 300 can be applied to a vehicle, and the device body 301 can be a vehicle body, and the imaging module 200 can be set on the vehicle body, for example, inside the vehicle body or outside the vehicle body.

[0236] It can be understood that the terminal device 300 having the above-mentioned imaging module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, the terminal device 300 can meet the design requirements of high-pixel imaging while satisfying the miniaturization design of the optical lens 100. Since the above-mentioned technical effects have been described in detail in the embodiment of the optical lens 100, they will not be repeated here.

[0237] The optical lens, imaging module and terminal device disclosed in the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the optical lens, imaging module and terminal device of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on 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 relational expressions: 190deg < FOV < 210deg and 1.65 < IMGH / F < 1.8; 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.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 7 < TTL / IMGH < 7.3, and / or, 12 < TTL / F < 13, and / or, CT45 / CT34 > 2; Wherein, 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, characterized in that: The optical lens satisfies the following relational expressions: -6 < F1 / F < -4, and / or, 3 < F4 / F < 8, and / or, 1 < F1 / F2 < 3; Wherein, 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, characterized in that: The optical lens satisfies the following relational expressions: 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; Wherein, SD1 is the maximum effective semi-aperture of the object side surface of the first lens, SD3 is the maximum effective semi-aperture of the object side surface of the second lens, SD8 is the maximum effective semi-aperture of the image side surface of the fourth lens, SD9 is the maximum effective semi-aperture of the object side surface of the fifth lens, R10 is the curvature radius of the image side surface of the fifth lens at the optical axis, and SD10 is the maximum effective semi-aperture of the image side surface of the fifth lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: -5 < CT3 / SAGS5 < -2, and / or, 1.2 < CT5 / ET5 < 2.1, and / or, 1.2 < CT7 / ET7 < 1.5; Wherein, CT3 is the thickness of the third lens on the optical axis, SAGS5 is the distance in the optical axis direction from the maximum effective semi-aperture of the object side of the third lens to the intersection of the object side of the third lens and the optical axis, CT5 is the thickness of the fifth lens on the optical axis, ET5 is the distance in the optical axis direction 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 in the optical axis direction 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, characterized in that: 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; Wherein, R6 is the radius of curvature of the image side of the third lens at the optical axis, R5 is the radius of curvature of the object side of the third lens at the optical axis, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, R10 is the radius of curvature of the image side of the fifth lens at the optical axis, R11 is the radius of curvature of the object side of the sixth lens at the optical axis, and R12 is the radius of curvature of the image side of the sixth lens at the optical axis.

7. The optical lens according to claim 1, characterized in that: 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; Wherein, 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 in the optical axis direction from the image side of the first lens to the object side of the second lens.

8. The optical lens according to claim 1, characterized in that: 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; Wherein, DOS is the distance in the optical axis direction from the object side of the first lens to the diaphragm of the optical lens, TTL is the distance in the optical axis direction 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 imaging 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 includes a device body and the imaging module according to claim 9, and the imaging module is disposed on the device body.

Images