Optical lenses, camera modules and electronic equipment

Abstract

The present invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises a first lens having a positive refractive power arranged in sequence from the object side to the image side, wherein the object side surface and the image side surface are convex and concave respectively; a second lens having a refractive power, wherein the image side surface is concave; a third lens having a refractive power; a fourth lens having a refractive power, wherein the object side surface and the image side surface are concave and convex respectively; a fifth lens having a positive refractive power, wherein the object side surface and the image side surface are concave and convex respectively; a sixth lens having a negative refractive power, wherein the object side surface and the image side surface are both concave; and 1.45mm≤Imgh / Fno<1.55mm is satisfied, wherein Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the aperture number of the optical lens. The optical lens, the camera module and the electronic device provided by the present invention can realize the miniaturization of the optical lens, and can also realize the characteristics of large aperture and large image surface, and can improve the imaging clarity in a dark environment.

Description

Technical Field

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

[0002] At present, in order to improve the user experience, camera functions are added to various devices (such as smart phones, cars, monitoring equipment, medical equipment, etc.). However, as the application of camera modules becomes more and more extensive, users have higher and higher requirements for the imaging clarity of camera modules in dark environments (such as night, rainy days, etc.). However, in actual design, there is a big contradiction between the miniaturization of camera modules and clear imaging in dark environments. Summary of the invention

[0003] The embodiments of the present invention disclose an optical lens, a camera module and an electronic device, which can meet the miniaturization design requirements of the optical lens while realizing the large aperture and large image surface characteristics of the optical lens, and can improve the imaging clarity in a dark environment.

[0004] In order to achieve the above-mentioned object, in a first aspect, the present invention discloses an optical lens, which has six lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens arranged in sequence from the object side to the image side along the optical axis;

[0005] The first lens has positive refractive power, and its object side surface is convex at the near optical axis, and its image side surface is concave at the near optical axis; the second lens has refractive power, and its image side surface is concave at the near optical axis; the third lens has refractive power; the fourth lens has refractive power, and its object side surface is concave at the near optical axis, and its image side surface is convex at the near optical axis; the fifth lens has positive refractive power, and its object side surface is concave at the near optical axis, and its image side surface is convex at the near optical axis; the sixth lens has negative refractive power, and its object side surface is concave at the near optical axis, and its image side surface is concave at the near optical axis;

[0006] The optical lens satisfies the following relationship: 1.45mm≤Imgh / Fno<1.55mm;

[0007] Among them, Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the aperture number of the optical lens.

[0008] The first lens with positive refractive power and the second lens with refractive power in the optical lens can correct the spherical aberration of the optical lens on the optical axis, and the surface setting of the first lens with a convex surface on the object side and a concave surface on the image side at the optical axis can help converge the light entering the optical lens, thereby improving the optical performance of the optical lens. The third lens and the fourth lens with refractive power at the same time and the surface setting of the fourth lens with a concave surface on the object side and a convex surface on the image side at the optical axis can further correct the astigmatism of the optical lens and the spherical aberration on the optical axis. Combined with the fifth lens with positive refractive power and the sixth lens with negative refractive power, the field curvature of the optical lens can be corrected, and the surface setting of the fifth lens with a concave surface on the object side and a convex surface on the image side at the optical axis and the sixth lens with a concave surface on the object side and a concave surface on the image side at the optical axis can help correct the astigmatism and field curvature of the optical lens, thereby improving the imaging quality of the optical lens.

[0009] In addition, the optical lens satisfies 1.45mm≤Imgh / Fno<1.55mm; wherein Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the aperture number of the optical lens. This enables the optical lens to obtain a larger aperture and imaging surface, so as to increase the amount of light entering the optical lens, improve the imaging quality of the optical lens in a dark environment, and enable the optical lens to acquire more scene content, so as to enrich the imaging information of the optical lens, and thus be able to adapt to an image sensor with higher resolution, so as to improve the imaging quality.

[0010] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 0.18<(SAG11+SAG21) / TTL<0.21;

[0011] Among them, SAG11 is the distance from the maximum effective diameter of the object side of the first lens to the intersection of the object side of the first lens and the optical axis in the direction parallel to the optical axis, SAG21 is the distance from the maximum effective diameter of the object side of the second lens to the intersection of the object side of the second lens and the optical axis in the direction parallel to the optical axis, and TTL is the distance from the object side of the first lens to the imaging surface of the optical lens on the optical axis, which is the total optical length of the optical lens. When the optical lens satisfies the above relationship, the influence of the thickness of the first lens and the second lens on the overall size of the optical lens can be controlled to reduce the proportion of the first lens and the second lens in the total optical length of the optical lens, thereby facilitating the compression of the total optical length of the optical lens and realizing the miniaturization design of the optical lens.

[0012] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expressions: 2.80 < L4 / (W4 + V4) < 3.50; and / or 3.0 < L6 / (W6 + V6) < 3.5; and / or 1.5 < MAX11 / MIN11 < 2.5;

[0013] Wherein, L4 is the effective semi-aperture of the image side of the fourth lens, W4 is half of the maximum value of the thickness in the optical axis direction within the effective aperture of the image side of the fourth lens, V4 is half of the minimum value of the thickness in the optical axis direction within the effective aperture of the image side of the fourth lens, L6 is the effective semi-aperture of the image side of the sixth lens, W6 is half of the maximum value of the thickness in the optical axis direction within the effective aperture of the image side of the sixth lens, V6 is half of the minimum value of the thickness in the optical axis direction within the effective aperture of the image side of the sixth lens, MAX11 is the maximum distance along the direction parallel to the optical axis from the image side of the fifth lens to the object side of the sixth lens, and MIN11 is the minimum distance along the direction parallel to the optical axis from the image side of the fifth lens to the object side of the sixth lens.

[0014] When the optical lens satisfies the relational expression: 2.80 < L4 / (W4 + V4) < 3.50, the ratio of the above parameters of the fourth lens can be reasonably controlled to avoid the situation that the outer periphery of the fourth lens is too thin, so that the curvature of the fourth lens can be controlled, the sensitivity of the optical lens can be reduced, the aberration of the optical lens can be balanced, and the imaging quality of the optical lens can be improved.

[0015] When the optical lens satisfies the relational expression: 3.0 < L6 / (W6 + V6) < 3.5, the ratio of the above parameters of the sixth lens can be reasonably controlled to avoid the situation that the outer periphery of the sixth lens is too thick, the forming yield of the lens can be effectively improved, the probability of generating weld lines can be reduced, the overall structural strength of the lens can also be improved, and the degree of deformation of the lens under different environmental conditions can be reduced.

[0016] The limitation of the relational expression: 1.5 < MAX11 / MIN11 < 2.5 can control the ratio of the maximum distance and the minimum distance between the image side of the fifth lens and the object side of the sixth lens within a reasonable range, so that the surface shapes of the fifth lens and the sixth lens can be prevented from being too curved to reduce local astigmatism, and the overall sensitivity of the optical lens can also be reduced, which helps to reduce the process difficulty and manufacturing difficulty.

[0017] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression: 1.90 < CT5 / ET5 < 2.5;

[0018] Wherein, CT5 is the distance from the object side surface of the fifth lens to the image side surface of the fifth lens on the optical axis, that is, the center thickness of the fifth lens, and ET5 is the thickness from the effective diameter edge of the object side surface of the fifth lens to the effective diameter edge of the image side surface of the fifth lens in the direction parallel to the optical axis, that is, the edge thickness of the fifth lens. The definition of the above relationship can control the center thickness and edge thickness ratio of the fifth lens within a reasonable range, thereby effectively balancing the high-order aberrations generated by the optical lens, and facilitating the adjustment of the field curvature of the optical lens during the manufacturing process, thereby improving the imaging quality of the optical lens.

[0019] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 1.40 <Fno*tan(HFOV)<1.70;

[0020] Wherein, HFOV is half of the maximum field of view of the optical lens, and tan(HFOV) is the tangent value of half of the maximum field of view of the optical lens. When the optical lens satisfies the above relationship, the relationship between the aperture number and the maximum field of view of the optical lens can be coordinated, so that the optical lens can have the characteristics of large aperture and large field of view at the same time, thereby effectively improving the imaging clarity of the optical lens, and can also adapt to image sensors with higher resolution to improve the imaging quality of the camera module.

[0021] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship: 2.5<|R32 / R41|<13.5; and / or;

[0022] 0.25 <R42 / R51<0.65;

[0023] Among them, R32 is the curvature radius of the image side surface of the third lens at the optical axis, R41 is the curvature radius of the object side surface of the fourth lens at the optical axis; R42 is the curvature radius of the image side surface of the fourth lens at the optical axis, and R51 is the curvature radius of the object side surface of the fifth lens at the optical axis.

[0024] When the optical lens satisfies 2.5<|R32 / R41|<13.5, the surface shape change trends of the image side surface of the third lens and the object side surface of the fourth lens can be effectively controlled, thereby controlling the change trend of the air gap between the third lens and the fourth lens, so as to reduce the manufacturing sensitivity of the third lens and the fourth lens, and balance the high-order coma of the optical lens, thereby improving the imaging quality of the optical lens.

[0025] When the optical lens satisfies 0.25 < R42 / R51 < 0.65, the change trends of the image side surface shape of the fourth lens and the object side surface shape of the fifth lens can be effectively controlled, so as to control the change trend of the air gap between the fourth lens and the fifth lens, facilitate reducing the manufacturing sensitivity of the fourth lens and the fifth lens, and can also balance the high-order coma of the optical lens, thereby improving the imaging quality of the optical lens.

[0026] That is, the limitation under the above two relationships can improve the design correlation of the third lens, the fourth lens, and the fifth lens, so as to improve the design integrity of the optical lens through the correlated design, thereby avoiding a great impact on the imaging quality of the optical lens when adjusting one of the lenses.

[0027] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expressions: 2.4 < (|R61| + |R62|) / |f6| < 4.0; and / or;

[0028] 1.1 < (|R61| + |R62|) / f ≤ 1.8;

[0029] Wherein, R61 is the curvature radius of the object side surface of the sixth lens at the optical axis, R62 is the curvature radius of the image side surface of the sixth lens at the optical axis, f6 is the focal length of the sixth lens, and f is the focal length of the optical lens.

[0030] When the optical lens satisfies 2.4 < (|R61| + |R62|) / |f6| < 4.0, the relationship between the curvature radii of the object side surface and the image side surface of the sixth lens and the focal length of the sixth lens can be controlled within a reasonable range, so that the astigmatism of the sixth lens can be within a controllable range, and the astigmatism generated by the previous first lens to the fifth lens can also be effectively balanced, thereby improving the imaging quality of the optical lens.

[0031] When the optical lens satisfies 1.1 < (|R61| + |R62|) / f ≤ 1.8, the relationship between the curvature radii of the object side surface and the image side surface of the sixth lens and the focal length of the optical lens can be controlled within a reasonable range, so that the astigmatism of the sixth lens can be within a controllable range, and the astigmatism generated by the previous first lens to the fifth lens can also be effectively balanced, thereby improving the imaging quality of the optical lens.

[0032] That is, the limitation of the above two relational expressions can realize the correlated control of the surface shape of the sixth lens, its own focal length, and the focal length of the optical lens, thereby effectively balancing the astigmatism of the optical lens, and further improving the imaging quality of the optical lens.

[0033] As an alternative embodiment, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expressions: 0.5 < f1 / f < 1.1; and / or;

[0034] 0.2 < (f1 + f6) / f < 0.6;

[0035] wherein, f1 is the focal length of the first lens, f is the focal length of the optical lens, and f6 is the focal length of the sixth lens.

[0036] When the optical lens satisfies 0.5 < f1 / f < 1.1, the ratio of the focal lengths of the first lens and the optical lens can be controlled within a reasonable range to avoid excessive refractive power of the first lens, thereby facilitating adjustment of the focal length of the optical lens, and also enabling correction of the high-order spherical aberration of the optical lens, and further improving the imaging quality of the optical lens.

[0037] As the first lens and the last lens through which the incident light enters the optical lens, the focal lengths of the first lens and the sixth lens have a greater influence on the optical lens. When the optical lens satisfies 0.2 < (f1 + f6) / f < 0.6, it is possible to avoid excessive refractive power of the first lens, thereby contributing to the correction of high-order spherical aberration, and further improving the imaging quality of the optical lens.

[0038] That is, the limitations of the above two relational expressions can further control the relationship between the focal lengths of the first lens, the sixth lens, and the optical lens, thereby avoiding excessive refractive power of a certain lens from affecting the imaging quality of the optical lens.

[0039] In a second aspect, the present invention discloses an imaging 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. The imaging module having this optical lens can achieve the characteristics of a large aperture and a wide angle while meeting the miniaturization design, so as to improve the imaging clarity.

[0040] In a third aspect, the present invention discloses an electronic device, which includes a housing and the imaging module as described in the second aspect above, and the imaging module is disposed in the housing. The electronic device having this imaging module can achieve the characteristics of a large aperture and a wide angle while meeting the miniaturization design, so as to improve the imaging clarity.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] The optical lens, camera module and electronic device provided by the embodiment of the present invention, the first lens with positive refractive power and the second lens with refractive power in the optical lens can correct the spherical aberration of the optical lens on the optical axis, and the surface setting of the first lens with a convex surface on the object side and a concave surface on the image side at the optical axis can help to converge the light entering the optical lens, thereby improving the optical performance of the optical lens. At the same time, the third lens and the fourth lens with refractive power and the surface setting of the fourth lens with a concave surface on the object side and a convex surface on the image side at the optical axis can further correct the astigmatism and spherical aberration of the optical lens on the optical axis. Combined with the fifth lens with positive refractive power and the sixth lens with negative refractive power, the field curvature of the optical lens can be corrected, and the surface setting of the fifth lens with a concave surface on the object side and a convex surface on the image side at the optical axis and the sixth lens with a concave surface on the object side and a concave surface on the image side at the optical axis can help to correct the astigmatism and field curvature of the optical lens, thereby improving the imaging quality of the optical lens.

[0043] In addition, the optical lens satisfies 1.45mm≤Imgh / Fno<1.55mm; wherein Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the aperture number of the optical lens. This enables the optical lens to obtain a larger aperture and imaging surface to increase the amount of light entering the optical lens, improve the imaging quality of the optical lens in dark environments, and enable the optical lens to obtain more scene content to enrich the imaging information of the optical lens, thereby being able to adapt to image sensors with higher resolution to improve imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 is a schematic structural diagram of an optical lens disclosed in the first embodiment of the present application;

[0046] Figure 2 is an aberration diagram of the optical lens disclosed in the first embodiment of the present application;

[0047] Figure 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

[0048] Figure 4 is an aberration diagram of the optical lens disclosed in the second embodiment of the present application;

[0049] Figure 5 is a schematic structural diagram of an optical lens disclosed in the third embodiment of the present application;

[0050] Figure 6 is an aberration diagram of the optical lens disclosed in the third embodiment of the present application;

[0051] Figure 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

[0052] Figure 8 is an aberration diagram of the optical lens disclosed in the fourth embodiment of the present application;

[0053] Fig. 9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

[0054] Fig.10 is an aberration diagram of the optical lens disclosed in the fifth embodiment of the present application;

[0055] Fig.11 is a schematic structural diagram of an optical lens disclosed in a sixth embodiment of the present application;

[0056] Fig.12 is an aberration diagram of the optical lens disclosed in the sixth embodiment of the present application;

[0057] Fig.13 It is a structural schematic diagram of the camera module disclosed in this application;

[0058] Fig.14 It is a schematic diagram of the structure of the electronic device disclosed in this application. DETAILED DESCRIPTION

[0059] 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.

[0060] 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.

[0061] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0062] See also Figure 1According to the first aspect of the present application, 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 and a sixth lens L6 arranged in sequence from the object side to the image side along the optical axis O; when imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in sequence from the object side of the first lens L1, and finally forms an image on the imaging surface 101 of the optical lens 100. Among them, the first lens L1 has positive refractive power, the second lens L2 has positive refractive power or negative refractive power, the third lens L3 has positive refractive power or negative refractive power, the fourth lens L4 has positive refractive power or negative refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0063] Further, the object-side surface 11 of the first lens L1 is convex at the near optical axis O, and the image-side surface 12 of the first lens L1 is concave at the near optical axis O; the object-side surface 21 of the second lens L2 is convex or concave at the near optical axis O, and the image-side surface 22 of the second lens L2 is concave at the near optical axis O; the object-side surface 31 of the third lens L3 is convex or concave at the near optical axis O, and the image-side surface 32 of the third lens L3 is convex or concave at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O. Considering that the optical lens 100 can be applied to electronic devices such as vehicle-mounted devices and driving recorders, or can be applied to automobiles and used as a camera on the body of the automobile, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can all be glass lenses, so as to have a good optical effect and reduce the temperature sensitivity of the optical lens 100. At the same time, each lens can adopt a spherical surface or an aspherical surface.

[0064] In addition, it can be understood that in other embodiments, when the optical lens 100 is applied to electronic devices such as smart phones and smart tablets, the material of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can also be plastic, and each lens can be spherical or aspherical.

[0065] In some embodiments, the optical lens 100 further includes a stop 102, which may be an aperture stop 102 and / or a field stop 102, which may be disposed between the object side and the object side surface of the first lens L1. Exemplarily, the stop 102 may be disposed between the object side of the optical lens 100 and the object side surface 11 of the first lens L1. It is understood that in other embodiments, the stop 102 may also be disposed between other lenses, such as between the image side surface 42 of the fourth lens L4 and the object side surface 51 of the fifth lens L5, and the setting may be adjusted according to actual conditions, and this embodiment does not specifically limit this.

[0066] Optionally, in order to improve the imaging quality, the optical lens 100 further includes an infrared filter 70, and the infrared filter 70 is disposed between the sixth lens L6 and the imaging surface 101 of the optical lens 100. It is understandable that the infrared filter 70 can be selected as an infrared cut-off infrared filter. The infrared cut-off infrared filter can be selected to improve the imaging quality of the optical lens 100 by filtering out infrared light, so that the imaging is more in line with the visual experience of the human eye. It is understandable that the infrared filter 70 can be made of optical glass coating, or can be made of colored glass, or an infrared filter 70 of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[0067] Optionally, in order to improve imaging quality, the optical lens 100 may further include a protective glass (not shown in this embodiment), and the protective glass may be disposed between the infrared filter 70 and the imaging surface 101 of the optical lens 100 to protect the optical lens 100 .

[0068] In some embodiments, the optical lens 100 satisfies the following relationship: 1.45mm≤Imgh / Fno<1.55mm; for example: Imgh / Fno can be 1.45mm, 1.46mm, 1.48mm, 1.49mm, 1.50mm, 1.51mm, 1.52mm, 1.53mm, 1.54mm, etc. Among them, Imgh is the radius of the maximum effective imaging circle of the optical lens 100, and Fno is the aperture number of the optical lens 100. The limitation of the above relationship can enable the optical lens 100 to obtain a larger aperture and imaging surface 101, so as to increase the amount of light entering the optical lens 100, improve the imaging quality of the optical lens 100 in a dark environment, and enable the optical lens 100 to obtain more scene content, so as to enrich the imaging information of the optical lens 100, and then be able to adapt to an image sensor with higher resolution to improve the imaging quality.

[0069] In some embodiments, the optical lens 100 satisfies the following relationship: 0.18 < (SAG11 + SAG21) / TTL < 0.21; for example, (SAG11 + SAG21) / TTL can be 0.185, 0.189, 0.190, 0.192, 0.194, 0.195, 0.198, 0.205, etc. Wherein, SAG11 is the distance from the maximum effective diameter of the object side 11 of the first lens L1 to the intersection of the object side 11 of the first lens L1 and the optical axis O in the direction parallel to the optical axis O, SAG21 is the distance from the maximum effective diameter of the object side 21 of the second lens L2 to the intersection of the object side 21 of the second lens L2 and the optical axis O in the direction parallel to the optical axis O, and TTL is the distance from the object side 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O, that is, the total optical length of the optical lens 100. When the optical lens 100 satisfies the above relationship, the influence of the self-thickness dimensions of the first lens L1 and the second lens L2 on the overall size of the optical lens 100 can be controlled to reduce the proportion of the first lens L1 and the second lens L2 in the total optical length of the optical lens 100, so as to facilitate the compression of the total optical length of the optical lens 100 and realize the miniaturized design of the optical lens 100.

[0070] In some embodiments, the optical lens 100 satisfies the following relationships: 2.80 < L4 / (W4 + V4) < 3.50; and / or 3.0 < L6 / (W6 + V6) < 3.5; and / or 1.5 < MAX11 / MIN11 < 2.5; for example, L4 / (W4 + V4) can be 2.85, 2.90, 2.95, 3.0, 3.05, 3.08, 3.29, 3.30, 3.36, 3.40, 3.45, 3.47, etc. Wherein, L4 is the effective semi-aperture of the image side 42 of the fourth lens L4, W4 is half of the maximum thickness value in the direction of the optical axis O within the effective aperture of the image side 42 of the fourth lens L4, and V4 is half of the minimum thickness value in the direction of the optical axis O within the effective aperture of the image side 42 of the fourth lens L4. When the optical lens 100 satisfies the above relationships, the ratio of the above parameters of the fourth lens L4 can be reasonably controlled to avoid the situation that the outer periphery of the fourth lens L4 is too thin, so that the curvature of the fourth lens L4 can be controlled, the sensitivity of the optical lens 100 can be reduced to balance the aberration of the optical lens 100, and further the imaging quality of the optical lens 100 can be improved. When it is lower than the lower limit, the overall sensitivity of the optical lens 100 will increase, which is not conducive to engineering manufacturing; when it is higher than the upper limit, it is difficult to correct the field curvature and aberration of the optical lens 100, resulting in poor imaging quality of the optical lens 100.

[0071] For example, L6 / (W6+V6) can be 3.10, 3.20, 3.21, 3.27, 3.32, 3.33, 3.39, 3.40, 3.42, 3.45, 3.48, etc. Wherein, L6 is the effective semi-aperture of the image side surface 62 of the sixth lens L6, W6 is half of the maximum thickness of the image side surface 62 of the sixth lens L6 in the direction of the optical axis O within the effective aperture, and V6 is half of the minimum thickness of the image side surface 62 of the sixth lens L6 in the direction of the optical axis O within the effective aperture. When the optical lens 100 satisfies the above relationship, the ratio of the above parameters of the sixth lens L6 can be reasonably controlled to avoid the situation where the outer periphery of the sixth lens L6 is too thick, which can effectively improve the molding yield of the lens, reduce the probability of weld lines, and also improve the overall structural strength of the lens, and reduce the degree of deformation of the lens under different environmental conditions. When it is lower than the lower limit, the overall sensitivity of the optical lens 100 will increase, which is not conducive to engineering manufacturing; when it is higher than the upper limit, it is difficult to correct the field curvature and aberration of the optical lens 100, resulting in the deterioration of the imaging quality of the optical lens 100.

[0072] For example, MAX11 / MIN11 can be 1.55, 1.57, 1.61, 1.65, 1.70, 1.77, 1.80, 1.85, 1.95, 2.00, 2.10, 2.20, 2.26, 2.30, 2.33, 2.40, 2.47, etc. MAX11 is the maximum distance from the image side surface 52 of the fifth lens L5 to the object side surface 61 of the sixth lens L6 along the direction parallel to the optical axis O, and MIN11 is the minimum distance from the image side surface 52 of the fifth lens L5 to the object side surface 61 of the sixth lens L6 along the direction parallel to the optical axis O. The limitation of the above relationship can control the ratio of the maximum distance to the minimum distance between the image side surface 52 of the fifth lens L5 and the object side surface 61 of the sixth lens L6 within a reasonable range, thereby preventing the surfaces of the fifth lens L5 and the sixth lens L6 from being too curved, thereby reducing local astigmatism, and reducing the overall sensitivity of the optical lens 100, which helps to reduce process difficulty and manufacturing difficulty.

[0073] In some embodiments, the optical lens 100 satisfies the following relationship: 1.90 < CT5 / ET5 < 2.5; for example, CT5 / ET5 can be 1.92, 1.96, 2.0, 2.04, 2.10, 2.16, 2.20, 2.24, 2.30, 2.40, 2.45, etc. Here, CT5 is the distance from the object side 51 of the fifth lens L5 to the image side 52 of the fifth lens L5 on the optical axis O, that is, the central thickness of the fifth lens L5, and ET5 is the thickness in the direction parallel to the optical axis O from the effective diameter edge of the object side 51 of the fifth lens L5 to the effective diameter edge of the image side 52 of the fifth lens L5, that is, the edge thickness of the fifth lens L5. The limitation of the above relationship can control the ratio of the central thickness to the edge thickness of the fifth lens L5 within a reasonable range, so as to effectively balance the higher-order aberrations generated by the optical lens 100, and also facilitate the adjustment of the field curvature during the manufacturing process of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0074] In some embodiments, the optical lens 100 satisfies the following relationship: 1.40 < Fno * tan(HFOV) < 1.70; for example, Fno * tan(HFOV) can be 1.42, 1.45, 1.46, 1.48, 1.49, 1.50, 1.55, 1.60, 1.61, 1.65, 1.68, etc. Here, HFOV is half of the maximum field of view angle of the optical lens 100, and tan(HFOV) is the tangent value of half of the maximum field of view angle of the optical lens 100. When the optical lens 100 satisfies the above relationship, the relationship between the aperture number and the maximum field of view angle of the optical lens 100 can be coordinated, so that the optical lens 100 can have the characteristics of a large aperture and a large field of view angle at the same time, thereby effectively improving the imaging clarity of the optical lens 100, and at the same time, it can also adapt to an image sensor with higher resolution to improve the imaging quality of the imaging module.

[0075] In some embodiments, the optical lens 100 satisfies the following relationship: 2.5 < |R32 / R41| < 13.5; for example, |R32 / R41| can be 2.89, 3.50, 4.45, 5.0, 6.20, 7.33, 7.49, 8.50, 9.80, 11.39, 12.11, 13.05, etc. Here, R32 is the radius of curvature of the image side 32 of the third lens L3 at the optical axis O, and R41 is the radius of curvature of the object side 41 of the fourth lens L4 at the optical axis O. The limitation of the above relationship can effectively control the change trend of the surface shapes of the image side 32 of the third lens L3 and the object side 41 of the fourth lens L4, so as to control the change trend of the air gap between the third lens L3 and the fourth lens L4, which is convenient for reducing the manufacturing sensitivity of the third lens L3 and the fourth lens L4, and can also balance the higher-order coma of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0076] In some embodiments, the optical lens 100 satisfies the following relationship: 0.25 < R42 / R51 < 0.65; for example, R42 / R51 can be 0.28, 0.30, 0.35, 0.40, 0.44, 0.50, 0.55, 0.58, 0.62, 0.64, etc. Wherein, R42 is the curvature radius of the image side 42 of the fourth lens L4 at the optical axis O, and R51 is the curvature radius of the object side 51 of the fifth lens L5 at the optical axis O. The limitation of the above relationship can effectively control the surface shape change trend of the image side 42 of the fourth lens L4 and the object side 51 of the fifth lens L5, thereby controlling the change trend of the air gap between the fourth lens L4 and the fifth lens L5, so as to reduce the manufacturing sensitivity of the fourth lens L4 and the fifth lens L5, and can also balance the high-order coma of the optical lens 100, thereby improving the imaging quality of the optical lens 100.

[0077] In some embodiments, the optical lens 100 satisfies the following relationships: 2.5 < |R32 / R41| < 13.5 and 0.25 < R42 / R51 < 0.65; for example, |R32 / R41| can be 2.89, 3.50, 4.45, 5.0, 6.20, 7.33, 7.49, 8.50, 9.80, 11.39, 12.11, 13.05, etc.; R42 / R51 can be 0.28, 0.30, 0.35, 0.40, 0.44, 0.50, 0.55, 0.58, 0.62, 0.64, etc. Wherein, R32 is the curvature radius of the image side 32 of the third lens L3 at the optical axis O, R41 is the curvature radius of the object side 41 of the fourth lens L4 at the optical axis O; R42 is the curvature radius of the image side 42 of the fourth lens L4 at the optical axis O, and R51 is the curvature radius of the object side 51 of the fifth lens L5 at the optical axis O. That is, the limitation of the above two relationships, in addition to the beneficial effects produced by their respective limitations, can also improve the design correlation of the third lens L3, the fourth lens L4, and the fifth lens L5, so as to improve the design integrity of the optical lens 100 through correlated design, thereby avoiding a large impact on the imaging quality of the optical lens 100 when adjusting one of the lenses.

[0078] In some embodiments, the optical lens 100 satisfies the following relationship: 2.4<(|R61|+|R62|) / |f6|<4.0; for example: (|R61|+|R62|) / |f6| may be 2.45, 2.46, 2.66, 2.88, 3.29, 3.81, 3.90, 3.98, etc. Wherein, R61 is the radius of curvature of the object side surface 61 of the sixth lens L6 at the optical axis O, R62 is the radius of curvature of the image side surface 62 of the sixth lens L6 at the optical axis O, and f6 is the focal length of the sixth lens L6. The above relationship can control the relationship between the radius of curvature of the object side surface 61 and the image side surface 62 of the sixth lens L6 and the focal length of the sixth lens L6 within a reasonable range, so that the astigmatism of the sixth lens L6 can be within a controllable range, and the astigmatism generated by the first lens L1 to the fifth lens L5 can be effectively balanced, thereby improving the imaging quality of the optical lens 100.

[0079] In some embodiments, the optical lens 100 satisfies the following relationship: 1.1<(|R61|+|R62|) / f≤1.8; for example, (|R61|+|R62|) / f may be 1.13, 1.17, 1.20, 1.25, 1.30, 1.35, 1.40, 1.50, 1.61, 1.70, 1.80, etc., wherein R61 is the radius of curvature of the object side surface 61 of the sixth lens L6 at the optical axis O, R62 is the radius of curvature of the image side surface 62 of the sixth lens L6 at the optical axis O, and f is the focal length of the optical lens 100. The limitation of the above relationship can control the relationship between the curvature radii of the object-side surface 61 and the image-side surface 62 of the sixth lens L6 and the focal length of the optical lens 100 within a reasonable range, so that the astigmatism of the sixth lens L6 can be within a controllable range, and the astigmatism generated by the first lens L1 to the fifth lens L5 can be effectively balanced, thereby improving the imaging quality of the optical lens 100.

[0080] In some embodiments, the optical lens 100 satisfies the following relational expressions: 2.4 < (|R61| + |R62|) / |f6| < 4.0 and 1.1 < (|R61| + |R62|) / f < 1.8; for example, (|R61| + |R62|) / |f6| can be 2.45, 2.46, 2.66, 2.88, 3.29, 3.81, 3.90, 3.98, etc., and (|R61| + |R62|) / f can be 1.13, 1.17, 1.20, 1.25, 1.30, 1.35, 1.40, 1.50, 1.61, 1.70, 1.80, etc. Here, R61 is the radius of curvature of the object side 61 of the sixth lens L6 at the optical axis O, R62 is the radius of curvature of the image side 62 of the sixth lens L6 at the optical axis O, f6 is the focal length of the sixth lens L6, and f is the focal length of the optical lens 100. That is, with the limitations of the above two relationships, in addition to the beneficial effects generated by their respective limitations, it is also possible to achieve the associated control of the surface shape of the sixth lens L6, its own focal length, and the focal length of the optical lens 100, thereby effectively balancing the astigmatism of the optical lens 100 and further improving the imaging quality of the optical lens 100.

[0081] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.5 < f1 / f < 1.1; for example, f1 / f can be 0.55, 0.60, 0.68, 0.70, 0.73, 0.74, 0.82, 0.94, 1.08, etc. Here, f1 is the focal length of the first lens L1, and f is the focal length of the optical lens 100. The limitation of the above relational expression can control the focal length ratio of the first lens L1 and the optical lens 100 within a reasonable range to avoid excessive refractive power of the first lens L1, thereby facilitating the adjustment of the focal length of the optical lens 100, and it can also achieve the correction of the high-order spherical aberration of the optical lens 100, and further improve the imaging quality of the optical lens 100.

[0082] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.2 < (f1 + f6) / f < 0.6; for example, (f1 + f6) / f can be 0.22, 0.25, 0.27, 0.35, 0.41, 0.48, 0.50, 0.59, etc. Here, f1 is the focal length of the first lens L1, f is the focal length of the optical lens 100, and f6 is the focal length of the sixth lens L6. As the first lens and the last lens that the incident light passes through when entering the optical lens 100, the focal lengths of the first lens L1 and the sixth lens L6 have a greater impact on the optical lens 100. The limitation of the above relational expression can avoid excessive refractive power of the first lens L1, thereby contributing to the correction of the high-order spherical aberration and further improving the imaging quality of the optical lens 100.

[0083] In some embodiments, the optical lens 100 satisfies the following relationships: 0.5 < f1 / f < 1.1 and 0.2 < (f1 + f6) / f < 0.6; for example: f1 / f can be 0.55, 0.60, 0.68, 0.70, 0.73, 0.74, 0.82, 0.94, 1.08, etc., and (f1 + f6) / f can be 0.22, 0.25, 0.27, 0.35, 0.41, 0.48, 0.50, 0.59, etc. Wherein, f1 is the focal length of the first lens L1, f is the focal length of the optical lens 100, and f6 is the focal length of the sixth lens L6. That is, the limitation of the above two relationships, in addition to the beneficial effects generated by their respective limitations, can further control the relationship between the focal lengths of the first lens L1, the sixth lens L6, and the optical lens 100, thereby avoiding excessive refractive power of a certain lens from affecting the imaging quality of the optical lens 100.

[0084] The optical lens 100 of this embodiment will be described in detail below in combination with specific parameters.

[0085] First Embodiment

[0086] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as Figure 1 shown. The optical lens 100 includes a diaphragm 102, 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 an infrared filter 70 arranged in sequence from the object side to the image side along the optical axis O. Among them, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a positive refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0087] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is concave at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is convex at the near optical axis O, and the image side surface 32 of the third lens L3 is concave at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is concave at the circumference. convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0088] Specifically, taking the focal length f of the optical lens 100 = 3.94 mm, the aperture number Fno of the optical lens 100 = 2.00, the maximum field of view FOV of the optical lens 100 = 71.9 deg, and the distance TTL = 4.679 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O, other parameters of the optical lens 100 are given in the following Table 1. Among them, the elements from the object side to the image side along the optical axis O of the optical lens 100 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 surface of the lens, and the surface with a larger surface number is the image side surface of the lens, such as surface numbers 1 and 2 correspond to the object side surface 11 and the image side surface 12 of the first lens L1, respectively. The radius of curvature in Table 1 is the radius of curvature of the object side surface or the image side surface 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 in the "Thickness" parameter column is the distance from the aperture to the next surface vertex (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 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 is set on the image side of the next surface vertex. If the aperture thickness is a positive value, the aperture is on the object side of the next surface vertex. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 1 are all mm. And the refractive index and Abbe number in Table 1 are obtained at a reference wavelength of 587.6nm, and the focal length is obtained at a reference wavelength of 555nm.

[0089] In the first embodiment, the object side surface and the image side surface of any lens among the first lens L1 to the sixth lens L6 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0090]

[0091] 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 O; c is the curvature at the optical axis O, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in the above Table 1); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. The following Table 2 lists the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspheric mirror surface in the first embodiment.

[0092] Table 1

[0093]

[0094] Table 2

[0095]

[0096]

[0097] See also Figure 2 , Figure 2 The aberration diagram of the optical lens 100 of the first embodiment is shown, wherein Figure 2 In (A), Figure 2 (A) shows the longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, and 470 nm. Figure 2 In (A), the horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the normalized field of view. Figure 2 It can be seen from (A) that the spherical aberration value of the optical lens 100 in the first embodiment is better, which means that the imaging quality of the optical lens 100 in this embodiment is better.

[0098] See also Figure 2 In (B), Figure 2 (B) is the astigmatism curve of the optical lens 100 in the first embodiment at a wavelength of 555 nm. The horizontal axis along the X-axis direction represents the focus offset, and the vertical axis along the Y-axis direction represents the image height, in units of mm. In the astigmatism curve, T represents the curvature of the imaging surface 101 in the meridian direction, and S represents the curvature of the imaging surface in the sagittal direction. Figure 2 It can be seen from (B) in FIG. 1 that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

[0099] See also Figure 2 (C) in Figure 2 (C) is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 555 nm. The horizontal axis along the X-axis direction represents the distortion, and the vertical axis along the Y-axis direction represents the image height, in units of mm. Figure 2 As can be seen from (C) in FIG. 1 , at a wavelength of 555 nm, the distortion of the optical lens 100 is well corrected.

[0100] Second embodiment

[0101] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figure 3As shown, the optical lens 100 includes a stop 102, 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 an infrared filter 70, which are sequentially arranged along the optical axis O from the object side to the image side. Among them, the first lens L1 has positive refractive power, the second lens L2 has positive 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, and the sixth lens L6 has negative refractive power.

[0102] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is convex at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is concave at the near optical axis O, and the image side surface 32 of the third lens L3 is concave at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is concave at the circumference. convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0103] Specifically, taking the focal length f of the optical lens 100 = 3.52 mm, the aperture number Fno of the optical lens 100 = 1.95, the maximum field of view FOV of the optical lens 100 = 79.1 deg, and the distance TTL = 4.433 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O as an example, other parameters of the optical lens 100 are given in Table 3 below. And the definition of each parameter can be derived from the description of the aforementioned embodiment, and will not be repeated here. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 3 are all mm. And the refractive index and Abbe number in Table 3 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0104] In the second embodiment, Table 4 gives the high-order coefficients that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0105] Table 3

[0106]

[0107] Table 4

[0108]

[0109]

[0110] See also Figure 4 , Figure 4 The aberration diagram of the optical lens 100 of the second embodiment is shown, wherein Figure 4 (A) Longitudinal spherical aberration diagram, Figure 4 (B) Astigmatism curve and Figure 4 It can be seen from the distortion curve diagram (C) in FIG. 1 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 4 (A) Figure 4 (B) Figure 4 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0111] Third embodiment

[0112] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figure 5 As shown, the optical lens 100 includes a stop 102, 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 an infrared filter 70, which are sequentially arranged along the optical axis O from the object side to the image side. Among them, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0113] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is concave at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is concave at the near optical axis O, and the image side surface 32 of the third lens L3 is convex at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0114] Specifically, taking the focal length f of the optical lens 100 = 3.62 mm, the aperture number Fno of the optical lens 100 = 1.9, the maximum field of view FOV of the optical lens 100 = 76.3 deg, and the distance TTL = 4.05 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O as an example, other parameters of the optical lens 100 are given in Table 5 below. And the definition of each parameter can be derived from the description of the aforementioned embodiment, and will not be repeated here. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 5 are all mm. And the refractive index and Abbe number in Table 5 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0115] In the third embodiment, Table 6 gives the coefficients of the higher-order terms that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0116] Table 5

[0117]

[0118] Table 6

[0119]

[0120]

[0121] See also Figure 6 , Figure 6 The aberration diagram of the optical lens 100 of the third embodiment is shown, wherein Figure 6 (A) Longitudinal spherical aberration diagram, Figure 6 (B) Astigmatism curve and Figure 6 It can be seen from the distortion curve diagram (C) in FIG. 1 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 6 (A) Figure 6 (B) Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0122] Fourth embodiment

[0123] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figure 7 As shown, the optical lens 100 includes a stop 102, 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 an infrared filter 70, which are sequentially arranged along the optical axis O from the object side to the image side. Among them, the first lens L1 has positive refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has positive refractive power, and the sixth lens L6 has negative refractive power.

[0124] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is concave at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is concave at the near optical axis O, and the image side surface 32 of the third lens L3 is convex at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0125] Specifically, taking the focal length f of the optical lens 100 = 3.798 mm, the aperture number Fno of the optical lens 100 = 2.0, the maximum field of view FOV of the optical lens 100 = 73.7 deg, and the distance TTL = 4.57 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O as an example, other parameters of the optical lens 100 are given in Table 7 below. And the definition of each parameter can be derived from the description of the aforementioned embodiment, and will not be repeated here. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 7 are all mm. And the refractive index and Abbe number in Table 7 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0126] In the fourth embodiment, Table 8 gives the coefficients of the higher-order terms that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0127] Table 7

[0128]

[0129] Table 8

[0130]

[0131]

[0132] See also Figure 8 , Figure 8 FIG. 1 shows an aberration diagram of the optical lens 100 of the fourth embodiment, wherein Figure 8 (A) Longitudinal spherical aberration diagram, Figure 8 (B) Astigmatism curve and Figure 8 It can be seen from the distortion curve diagram (C) in FIG. 1 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Figure 8 (A) Figure 8 (B) Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0133] Fifth embodiment

[0134] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Fig. 9 As shown, the optical lens 100 includes a stop 102, 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 an infrared filter 70, which are sequentially arranged along the optical axis O from the object side to the image side. Among them, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a negative refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0135] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is concave at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is convex at the near optical axis O, and the image side surface 32 of the third lens L3 is concave at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is concave at the circumference. convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0136] Specifically, taking the focal length f of the optical lens 100 = 3.78 mm, the aperture number Fno of the optical lens 100 = 1.88, the maximum field of view FOV of the optical lens 100 = 74.3 deg, and the distance TTL = 4.55 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O as an example, other parameters of the optical lens 100 are given in the following Table 9. And the definition of each parameter can be derived from the description of the aforementioned embodiment, and will not be repeated here. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 9 are all mm. And the refractive index and Abbe number in Table 9 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0137] In the fifth embodiment, Table 10 gives the high-order coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

[0138] Table 9

[0139]

[0140]

[0141] Table 10

[0142]

[0143] See also Fig.10 , Fig.10 The aberration diagram of the optical lens 100 of the fifth embodiment is shown, wherein Fig.10 (A) Longitudinal spherical aberration diagram, Fig.10 (B) Astigmatism curve and Fig.10 It can be seen from the distortion curve diagram (C) in FIG. 1 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.10 (A) Fig.10 (B) Fig.10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0144] Sixth embodiment

[0145] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of the present application is as follows Fig.11 As shown, the optical lens 100 includes a stop 102, 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 an infrared filter 70, which are sequentially arranged along the optical axis O from the object side to the image side. Among them, the first lens L1 has a positive refractive power, the second lens L2 has a negative refractive power, the third lens L3 has a negative refractive power, the fourth lens L4 has a negative refractive power, the fifth lens L5 has a positive refractive power, and the sixth lens L6 has a negative refractive power.

[0146] Further, the object side surface 11 of the first lens L1 is convex at the near optical axis O, and the image side surface 12 of the first lens L1 is concave at the near optical axis O; the object side surface 11 of the first lens L1 is convex at the circumference, and the image side surface 12 of the first lens L1 is concave at the circumference; the object side surface 21 of the second lens L2 is concave at the near optical axis O, and the image side surface 22 of the second lens L2 is concave at the near optical axis O; the object side surface 21 of the second lens L2 is convex at the circumference, and the image side surface 22 of the second lens L2 is concave at the circumference; the object side surface 31 of the third lens L3 is concave at the near optical axis O, and the image side surface 32 of the third lens L3 is concave at the near optical axis O; the object side surface 31 of the third lens L3 is concave at the circumference, and the image side surface 32 of the third lens L3 is concave at the circumference convex surface; the object-side surface 41 of the fourth lens L4 is concave at the near optical axis O, and the image-side surface 42 of the fourth lens L4 is convex at the near optical axis O; the object-side surface 41 of the fourth lens L4 is concave at the circumference, and the image-side surface 42 of the fourth lens L4 is convex at the circumference; the object-side surface 51 of the fifth lens L5 is concave at the near optical axis O, and the image-side surface 52 of the fifth lens L5 is convex at the near optical axis O; the object-side surface 51 of the fifth lens L5 is concave at the circumference, and the image-side surface 52 of the fifth lens L5 is convex at the circumference; the object-side surface 61 of the sixth lens L6 is concave at the near optical axis O, and the image-side surface 62 of the sixth lens L6 is concave at the near optical axis O; the object-side surface 61 of the sixth lens L6 is concave at the circumference, and the image-side surface 62 of the sixth lens L6 is convex at the circumference.

[0147] Specifically, taking the focal length f of the optical lens 100 = 3.83 mm, the aperture number Fno of the optical lens 100 = 1.98, the maximum field of view FOV of the optical lens 100 = 73.3 deg, and the distance TTL = 4.63 mm from the object side surface 11 of the first lens L1 to the imaging surface 101 of the optical lens 100 on the optical axis O as an example, other parameters of the optical lens 100 are given in the following Table 11. And the definition of each parameter can be derived from the description of the aforementioned embodiment, and will not be repeated here. It can be understood that the units of the radius of curvature, thickness, and focal length in Table 11 are all mm. And the refractive index and Abbe number in Table 11 are obtained at a reference wavelength of 587.6 nm, and the focal length is obtained at a reference wavelength of 555 nm.

[0148] In the sixth embodiment, Table 12 gives the high-order coefficients that can be used for each aspherical mirror surface in the sixth embodiment, wherein each aspherical surface shape can be defined by the formula given in the first embodiment.

[0149] Table 11

[0150]

[0151]

[0152] Table 12

[0153]

[0154] See also Fig.12 , Fig.12 1 shows an aberration diagram of the optical lens 100 of the sixth embodiment, wherein Fig.12 (A) Longitudinal spherical aberration diagram, Fig.12 (B) Astigmatism curve and Fig.12 It can be seen from the distortion curve diagram (C) in FIG. 1 that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. Fig.12 (A) Fig.12 (B) Fig.12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figure 2 (A) Figure 2 (B) Figure 2 The contents described in (C) will not be repeated here.

[0155] Please refer to Table 13, which is a summary of the ratios of various relationship equations in the first to sixth embodiments of the present application.

[0156] Table 13

[0157]

[0158] See also Fig.13 The present application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the first to sixth embodiments above, and the image sensor 201 is arranged on the image side of the optical lens 100. The optical lens 100 is used to receive the light signal of the subject and project it to the image sensor 201, and the image sensor 201 is used to convert the light signal corresponding to the subject into an image signal, which will not be described in detail here. It can be understood that the camera module 200 with the above optical lens 100 can achieve wide-angle characteristics and improve imaging clarity while meeting the miniaturization design. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be described here.

[0159] See also Fig.14The present application also discloses an electronic device 300, which includes a housing and the above-mentioned camera module 200, and the camera module 200 is arranged in the housing. Among them, the electronic device 300 can be but not limited to a mobile phone, a tablet computer, a laptop computer, a smart watch, a monitor, a driving recorder, a reversing image, etc. It can be understood that the electronic device 300 with the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens 100. That is, while satisfying the miniaturized design, it can also achieve wide-angle characteristics and improve imaging clarity. 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.

[0160] The optical lens, camera module and electronic device disclosed in the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the optical lens, camera module and electronic device of the present invention and their core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An optical lens, characterized in that: There are a total of six lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged in sequence from the object side to the image side along the optical axis; The first lens has positive refractive power, its object side is convex near the optical axis, and its image side is concave near the optical axis; The second lens has refractive power, and its image side is concave near the optical axis; The third lens has refractive power; The fourth lens has refractive power, its object side is concave near the optical axis, and its image side is convex near the optical axis; The fifth lens has positive refractive power, its object side is concave near the optical axis, and its image side is convex near the optical axis; The sixth lens has negative refractive power, its object side is concave near the optical axis, and its image side is concave near the optical axis; The optical lens satisfies the following relational expressions: 1.45mm ≤ Imgh / Fno < 1.55mm; wherein, Imgh is the radius of the maximum effective imaging circle of the optical lens, and Fno is the f-number of the optical lens; 1.40 < Fno * tan(HFOV) < 1.70; wherein, HFOV is half of the maximum field of view angle of the optical lens, and tan(HFOV) is the tangent value of half of the maximum field of view angle of the optical lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 0.18 < (SAG11 + SAG21) / TTL < 0.21; wherein, SAG11 is the distance in the direction parallel to the optical axis from the maximum effective aperture of the object side of the first lens to the intersection point of the object side of the first lens and the optical axis, SAG21 is the distance in the direction parallel to the optical axis from the maximum effective aperture of the object side of the second lens to the intersection point of the object side of the second lens and the optical axis, and TTL is the distance on the optical axis from the object side of the first lens to the imaging surface of the optical lens.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 2.80 < L4 / (W4 + V4) < 3.50; and / or 3.0 < L6 / (W6 + V6) < 3.5; and / or 1.5 < MAX11 / MIN11 < 2.5; wherein, L4 is the effective semi-aperture of the image side of the fourth lens, W4 is half of the maximum value of the thickness in the optical axis direction within the effective aperture of the image side of the fourth lens, V4 is half of the minimum value of the thickness in the optical axis direction within the effective aperture of the image side of the fourth lens, L6 is the effective semi-aperture of the image side of the sixth lens, W6 is half of the maximum value of the thickness in the optical axis direction within the effective aperture of the image side of the sixth lens, V6 is half of the minimum value of the thickness in the optical axis direction within the effective aperture of the image side of the sixth lens, MAX11 is the maximum distance in the direction parallel to the optical axis from the image side of the fifth lens to the object side of the sixth lens, and MIN11 is the minimum distance in the direction parallel to the optical axis from the image side of the fifth lens to the object side of the sixth lens.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 1.90 < CT5 / ET5 < 2.5; Wherein, CT5 is the distance from the object side of the fifth lens to the image side of the fifth lens on the optical axis, and ET5 is the thickness in the direction parallel to the optical axis from the effective diameter edge of the object side of the fifth lens to the effective diameter edge of the image side of the fifth lens.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 2.5 < |R32 / R41| < 13.5; and / or; 0.25 < R42 / R51 < 0.65; Wherein, R32 is the curvature radius of the image side of the third lens at the optical axis, R41 is the curvature radius of the object side of the fourth lens at the optical axis; R42 is the curvature radius of the image side of the fourth lens at the optical axis, and R51 is the curvature radius of the object side of the fifth lens at the optical axis.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 2.4 < (|R61| + |R62|) / |f6| < 4.0; and / or; 1.1 < (|R61| + |R62|) / f ≤ 1.8; Wherein, R61 is the curvature radius of the object side of the sixth lens at the optical axis, R62 is the curvature radius of the image side of the sixth lens at the optical axis, f6 is the focal length of the sixth lens, and f is the focal length of the optical lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the following relational expressions: 0.5 < f1 / f < 1.1; and / or; 0.2 < (f1 + f6) / f < 0.6; Wherein, f1 is the focal length of the first lens, f is the focal length of the optical lens, and f6 is the focal length of the sixth lens.

8. A camera module, characterized in that: The imaging module includes an image sensor and the optical lens according to any one of claims 1-7, and the image sensor is disposed on the image side of the optical lens.

9. An electronic device, characterized in that: The electronic device includes a housing and the imaging module according to claim 8, and the imaging module is disposed in the housing.

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