Optical lenses, camera modules and electronic equipment

Abstract

The present invention discloses an optical lens, an imaging module and an electronic device. The optical lens sequentially includes, along the optical axis from the object side to the image side: a first lens with positive refractive power, the object side surface and the image side surface are convex and concave respectively near the optical axis; a second lens with negative refractive power, the object side surface and the image side surface are convex and concave respectively near the optical axis; a third lens with positive refractive power, the object side surface is convex near the optical axis; a fourth lens with refractive power; a fifth lens with refractive power, the object side surface and the image side surface are convex and concave respectively near the optical axis; a sixth lens with positive refractive power, the object side surface and the image side surface are convex and concave respectively near the optical axis; a seventh lens with negative refractive power, the object side surface and the image side surface are convex and concave respectively near the optical axis; the optical lens satisfies: 1.85 < FNOmax / FNOmin < 2.1. Thus, it can not only meet the miniaturization requirement, but also has the characteristic of variable aperture.

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] With the progress and development of society, people have higher and higher requirements on the camera capabilities of electronic devices. Usually, multiple lenses are used to enable electronic devices to shoot in different scenes and for different needs. However, the combination of multiple lenses will cause the electronic devices to have the defects of being large in size and overall heavy, which is not conducive to the development trend of miniaturization and lightweight of electronic devices. 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 requirements of miniaturization and have the characteristics of variable aperture.

[0004] In order to achieve the above-mentioned object, in a first aspect, the present invention discloses an optical lens, which has seven lenses with refractive power, and includes the following lenses in order from the object side to the image side along the optical axis:

[0005] A first lens having positive refractive power, wherein 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] A second lens having negative refractive power, wherein 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] A third lens element having positive refractive power, wherein the object side surface of the third lens element is convex at a position close to the optical axis;

[0008] The fourth lens has refractive power;

[0009] a fifth lens having refractive power, wherein the object side surface of the fifth lens is convex at the near optical axis, and the image side surface of the fifth lens is concave at the near optical axis;

[0010] a sixth lens having positive refractive power, wherein the object side surface of the sixth lens is convex at the near optical axis, and the image side surface of the sixth lens is concave at the near optical axis;

[0011] A seventh lens element having negative refractive power, wherein the object side surface of the seventh lens element is convex at the near optical axis, and the image side surface of the seventh lens element is concave at the near optical axis;

[0012] The optical lens satisfies the following relationship:

[0013] 1.85 <FNOmax / FNOmin<2.1;

[0014] Among them, FNOmax is the maximum aperture number of the optical lens, and FNOmin is the minimum aperture number of the optical lens.

[0015] In a second aspect, the present invention discloses a camera module, the camera module comprising an image sensor and the optical lens as described in the first aspect, wherein the image sensor is arranged on the image side of the optical lens. The camera module having the optical lens can satisfy the requirement of miniaturization while having the characteristic of variable aperture.

[0016] In a third aspect, the present invention discloses an electronic device, comprising a housing and the camera module as described in the second aspect, wherein the camera module is disposed in the housing. The electronic device having the camera module can have the characteristics of a variable aperture while meeting the requirements of miniaturization.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides an optical lens, a camera module and an electronic device. The first lens of the optical lens has a positive refractive power. With the design that the object side surface and the image side surface of the first lens are convex and concave respectively at the near optical axis, incident light at a large angle can enter the optical lens, expanding the field of view angle range of the optical lens to obtain the characteristics of a large field of view angle. At the same time, the incident light can be effectively converged, which is conducive to controlling the size of the first lens in the direction perpendicular to the optical axis to meet the design of miniaturization of the optical lens; with the second lens having a negative refractive power, the aberration generated by the first lens can be balanced, the on-axis spherical aberration can be corrected, so as to improve the imaging quality of the optical lens. With the object side surface and the image side surface of the second lens, the aberration generated by the first lens can be balanced, the on-axis spherical aberration can be corrected, so as to improve the imaging quality of the optical lens. The arrangement of convex and concave surfaces at the near optical axis can make the surface shapes of the second lens and the first lens more matched, so that the incident light has a smooth transition, which is beneficial to correcting off-axis aberrations and reducing the tolerance sensitivity of the optical lens. At the same time, it is also beneficial to reasonably configure the air gap between the front and rear lenses to reduce the risk of ghost images, thereby improving the imaging quality of the optical lens; the third lens has positive refractive power, and its object side surface is convex at the near optical axis, which can further enhance the light convergence of the optical lens at the near optical axis to shorten the total length of the optical lens, which is beneficial to the miniaturization design of the optical lens; the object side surface and image side surface of the fifth lens are convex and concave at the near optical axis, respectively, and the refractive power of the fifth lens can be positive or negative. The configuration of the sixth lens with positive refractive power can balance the larger aberrations produced by the front lens group (the first lens to the fourth lens), promote the aberration balance of the optical lens, improve the resolution of the optical lens, and thus improve the imaging quality of the optical lens; the sixth lens has a positive refractive power, and the object side and image side of the sixth lens are respectively convex and concave at the near optical axis, which can effectively converge the edge field light and reduce the deflection of the edge field light to correct the edge field aberrations produced by the incident light passing through the first lens to the fifth lens, and can also correct the spherical aberration and coma produced by the light diffusion through the fifth lens, thereby improving the imaging quality of the optical lens; in combination with the seventh lens with negative refractive power, it can balance the aberrations of ... in combination with the seventh lens with negative refractive power, it can balance the aberrations of the front lens group (the first lens to the fourth lens), promote the resolution of the optical lens, and thus improve the imaging quality of the optical lens; in combination with the seventh lens with negative refractive power, it can balance the aberrations of the front lens group (the first lens to the The difficult-to-correct aberrations produced by the front lens group (the first lens to the sixth lens) promote the aberration balance of the optical lens to improve the resolution of the optical lens, thereby further improving the imaging quality of the optical lens. Combined with the setting that the object side surface and the image side surface of the seventh lens are convex and concave respectively at the near optical axis, the surface shapes of the seventh lens and the sixth lens can be highly matched to reduce the tolerance sensitivity of the optical lens and improve the imaging quality of the optical lens. At the same time, the image side surface of the seventh lens is concave at the near optical axis, which can make the light of the edge field of view incident on the imaging surface of the optical lens with a smaller deflection angle, so that the edge of the image surface can also obtain a higher relative brightness, avoid the generation of dark corners, and improve the imaging quality of the optical lens.

[0019] In addition, the optical lens satisfies 1.85 < FNOmax / FNOmin < 2.1. By restricting the ratio of the maximum value to the minimum value of the aperture number of the optical lens, it can not only meet the variable aperture characteristic of the optical lens, but also be conducive to the optical lens obtaining a large aperture change range to achieve a large-range aperture adjustment of the optical lens, so that the optical lens can adapt to different shooting conditions, meet different shooting requirements, and further expand the usage range of the optical lens and improve the imaging quality of the optical lens. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0021] Figure 1 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application in the first aperture state;

[0022] Figure 2 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application in the second aperture state;

[0023] Figure 3 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application in the third aperture state;

[0024] Figure 4 is a longitudinal spherical aberration diagram, astigmatism diagram and distortion curve diagram of the optical lens disclosed in the first embodiment of the present application in the first aperture state;

[0025] Figure 5 is a longitudinal spherical aberration diagram, astigmatism diagram and distortion curve diagram of the optical lens disclosed in the first embodiment of the present application in the second aperture state;

[0026] Figure 6 is a longitudinal spherical aberration diagram, astigmatism diagram and distortion curve diagram of the optical lens disclosed in the first embodiment of the present application in the third aperture state;

[0027] Figure 7 is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application in the first aperture state;

[0028] Figure 8 is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application in the second aperture state;

[0029] Fig. 9 is a schematic structural diagram of the optical lens disclosed in the second embodiment of the present application in the third aperture state;

[0030] Fig.10 It is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the first aperture state disclosed in the second embodiment of the present application;

[0031] Fig.11 It is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the second aperture state disclosed in the second embodiment of the present application;

[0032] Fig.12 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the third aperture state disclosed in the second embodiment of the present application;

[0033] Fig.13 is a schematic structural diagram of the optical lens disclosed in the third embodiment of the present application in a first aperture state;

[0034] Fig.14 is a schematic structural diagram of the optical lens disclosed in the third embodiment of the present application in the second aperture state;

[0035] Fig.15 is a schematic structural diagram of the optical lens in the third aperture state disclosed in the third embodiment of the present application;

[0036] Fig.16 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the first aperture state disclosed in the third embodiment of the present application;

[0037] Fig.17 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the second aperture state disclosed in the third embodiment of the present application;

[0038] Fig.18 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the third aperture state disclosed in the third embodiment of the present application;

[0039] Fig.19 is a schematic structural diagram of the optical lens disclosed in the fourth embodiment of the present application in a first aperture state;

[0040] Fig. 20 is a schematic structural diagram of the optical lens disclosed in the fourth embodiment of the present application in the second aperture state;

[0041] Fig.21 is a schematic structural diagram of the optical lens in the third aperture state disclosed in the fourth embodiment of the present application;

[0042] Fig. 22 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the first aperture state disclosed in the fourth embodiment of the present application;

[0043] Fig.23is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the second aperture state disclosed in the fourth embodiment of the present application;

[0044] Fig.24 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the third aperture state disclosed in the fourth embodiment of the present application;

[0045] Fig.25 is a schematic structural diagram of the optical lens disclosed in the fifth embodiment of the present application in a first aperture state;

[0046] Fig.26 is a schematic structural diagram of the optical lens disclosed in the fifth embodiment of the present application in the second aperture state;

[0047] Fig. 27 is a schematic structural diagram of the optical lens in the third aperture state disclosed in the fifth embodiment of the present application;

[0048] Fig.28 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the first aperture state disclosed in the fifth embodiment of the present application;

[0049] Fig.29 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the second aperture state disclosed in the fifth embodiment of the present application;

[0050] Fig.30 is a longitudinal spherical aberration diagram, an astigmatism diagram and a distortion curve diagram of the optical lens in the third aperture state disclosed in the fifth embodiment of the present application;

[0051] Fig.31 It is a structural schematic diagram of the camera module disclosed in this application;

[0052] Fig.32 It is a schematic diagram of the structure of the electronic device disclosed in this application. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be further described below in conjunction with embodiments and drawings.

[0054] See also Figure 1According to the first aspect of the present application, the present application discloses an optical lens 100, which has seven lenses with refractive power, including 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 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, 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 101 of the optical lens 100. 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 refractive power, the fifth lens L5 has refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has negative refractive power.

[0055] Furthermore, 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 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 at the near optical axis O, and the image side surface 32 of the third lens L3 is concave or convex at the near optical axis O; the object side surface 41 of the fourth lens L4 is concave at the near optical axis O or convex, the image side surface 42 of the fourth lens L4 is concave or convex at the near optical axis O; the object side surface 51 of the fifth lens L5 is convex at the near optical axis O, and the image side surface 52 of the fifth lens L5 is concave at the near optical axis O; the object side surface 61 of the sixth lens L6 is convex 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 71 of the seventh lens L7 is convex at the near optical axis O, and the image side surface 72 of the seventh lens L7 is concave at the near optical axis O.

[0056] By reasonably configuring the surface shape and refractive power of each lens between the first lens L1 to the seventh lens L7, the optical lens can meet the requirements of miniaturization design and have high imaging quality.

[0057] Furthermore, in some embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 are all plastic, in which case the optical lens 100 can reduce weight and reduce costs. In other embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 can also be glass, in which case the optical lens 100 can have a good optical effect and can also reduce the temperature drift sensitivity of the optical lens 100.

[0058] In some embodiments, in order to increase the degree of freedom of surface design, 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 may all be aspherical lenses. It can be understood that in other embodiments, in order to facilitate processing and molding, 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 may also be spherical lenses.

[0059] In some embodiments, the optical lens 100 further includes an infrared filter 80, and the infrared filter 80 is disposed between the seventh lens L7 and the imaging surface 101 of the optical lens 100. The infrared filter 80 is selected to filter out infrared light, so that the imaging is more in line with the visual experience of the human eye, thereby improving the imaging quality. It is understandable that the infrared filter 80 can be made of plastic, or can be made of optical glass coating, or an infrared filter 80 of other materials, which can be selected according to actual needs and is not specifically limited in this embodiment.

[0060] In other embodiments, the infrared filter 80 may also filter out light of other wavelengths such as visible light and allow only infrared light to pass through, so that the optical lens 100 can form images in dark environments or special application scenarios and obtain better imaging quality.

[0061] In some embodiments, the optical lens 100 further includes a stop STO, which may be an aperture stop and / or a field stop, for example, the stop STO may be an aperture stop, or the stop STO may be a field stop, or the stop STO may be an aperture stop and a field stop. By arranging the stop STO on the object side of the first lens L1, the exit pupil can be moved away from the imaging surface 101, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization.

[0062] Optionally, the aperture STO is a variable aperture. By adjusting the distance D1 between the aperture STO and the object side surface 11 of the first lens L1, the aperture size of the aperture STO, and the distance D2 between the infrared filter 80 and the imaging surface 101, the aperture size of the optical lens 100 can be adjusted, so that the optical lens 100 can have the characteristic of variable aperture, enabling the optical lens 100 to adapt to different shooting conditions, meet different shooting requirements, further expand the usage range of the optical lens 100, and improve the imaging quality of the optical lens 100. The present invention shows the optical lens 100 in three different states of the aperture STO, so that the optical lens 100 has the maximum aperture state, the minimum aperture state, and the intermediate state. In this way, it can not only help with the understanding and implementation of the optical lens 100 in different states, but also control the aperture change range of the optical lens 100 to achieve a large range of aperture adjustment. It can be understood that during the process of adjusting the aperture STO, the aperture size of the optical lens 100 also changes accordingly, enabling the optical lens 100 to switch between multiple different aperture states, so that the optical lens 100 has multiple aperture states, including but not limited to the above three states.

[0063] It can be understood that in other embodiments, the aperture STO can also be disposed between other lenses and adjusted according to actual situations. This embodiment does not make specific limitations in this regard.

[0064] In some embodiments, the optical lens 100 satisfies the relationship: 1.85 < FNOmax / FNOmin < 2.1. For example, FNOmax / FNOmin = 1.861, 1.873, 1.884, 1.890, 2.011, 2.026, 2.045, 2.069, 2.086, or 2.094, etc. Wherein, FNOmax is the maximum aperture number of the optical lens, and FNOmin is the minimum aperture number of the optical lens.

[0065] By restricting the ratio of the maximum value to the minimum value of the aperture number of the optical lens 100, it can not only meet the variable aperture characteristic of the optical lens 100, but also be beneficial for the optical lens 100 to obtain a large aperture change range to achieve a large range of aperture adjustment of the optical lens 100, so that the optical lens 100 can adapt to different shooting conditions, meet different shooting requirements, further expand the usage range of the optical lens 100, and improve the imaging quality of the optical lens 100.

[0066] Please refer to Figures 1 to 3 , optionally, when the aperture STO has three different states respectively, the optical lens 100 can have different aperture numbers. Therefore, for the convenience of describing the three states of the aperture STO, Figure 1The diaphragm STO in the state shown is referred to as the aperture STO of the optical lens 100 in the first aperture state. Figure 2 The diaphragm STO in the state shown is referred to as the aperture STO of the optical lens 100 in the second aperture state. Figure 3 The diaphragm STO in the state shown is referred to as the aperture STO of the optical lens 100 in the first aperture state.

[0067] In some embodiments, the optical lens 100 satisfies the relational expression: -55 < R62 / SAG62 < -40. For example, R62 / SAG62 = -54.93, -54.87, -54.56, -54.22, -42.08, -41.85, -41.56, -40.81, -40.66, or -40.15. Wherein, R62 is the radius of curvature of the image side 62 of the sixth lens L6 at the optical axis O, and SAG62 is the distance from the intersection of the image side 62 of the sixth lens L6 and the optical axis O to the point on the optical axis O where the maximum effective radius of the image side 62 of the sixth lens L6 is located (i.e., the sagitta at the maximum effective semi-aperture of the image side 62 of the sixth lens L6).

[0068] By restricting the ratio of the radius of curvature of the image side 62 of the sixth lens L6 at the optical axis O to the sagitta at the maximum effective semi-aperture, the shape and curvature of the image side 62 of the sixth lens L6 can be effectively constrained, which is beneficial to reducing the spherical aberration caused by the sixth lens L6, promoting the aberration balance of the optical lens 100. At the same time, it can also avoid the situation where the processing difficulty of the sixth lens L6 increases due to the excessive curvature of the sixth lens L6, so as to improve the processability of the optical lens 100, reduce the sensitivity of the sixth lens L6, and be beneficial to the manufacturing and overall assembly of the sixth lens L6.

[0069] In some embodiments, the optical lens 100 satisfies the relational expression: 0.6 < ET7 / CT7 < 0.8. For example, ET7 / CT7 = 0.605, 0.625, 0.638, 0.647, 0.659, 0.664, 0.683, 0.741, 0.764, or 0.778, etc. Wherein, ET7 is the distance in the direction parallel to the optical axis O from the maximum effective semi-aperture of the object side 71 of the seventh lens L7 to the maximum effective semi-aperture of the image side 72 of the seventh lens L7 (i.e., the edge thickness of the seventh lens L7), and CT7 is the thickness of the seventh lens L7 on the optical axis O (i.e., the central thickness of the seventh lens L7).

[0070] By restricting the ratio of the edge thickness to the central thickness of the seventh lens L7, the bending degree of the seventh lens L7 can be controlled to reduce the surface shape complexity of the seventh lens L7 and improve the processability of the seventh lens L7. When the ratio is higher than the upper limit, the edge thickness of the seventh lens L7 is too large relative to the central thickness, and the incident angle of the marginal rays is too small, which is not conducive to the aberration correction of the seventh lens L7; when the ratio is lower than the lower limit, the edge thickness of the seventh lens L7 is too small relative to the central thickness, and the incident angle of the marginal rays is too large, which cannot ensure the imaging quality of the marginal field of view and easily leads to a decrease in the imaging quality of the optical lens 100.

[0071] In some embodiments, the optical lens 100 satisfies the relationship: 2 < SAG72 / SAG62 < 5. For example, SAG72 / SAG62 = 2.201, 2.435, 4.154, 4.278, 4.421, 4.524, 4.633, 4.745, 4.899 or 4.925. Wherein, SAG62 is the distance from the intersection point of the image side 62 of the sixth lens L6 and the optical axis O to the position on the optical axis O where the maximum effective radius of the image side 62 of the sixth lens L6 is located (i.e., the sagitta at the maximum effective semi-aperture of the image side 62 of the sixth lens L6), and SAG72 is the distance from the intersection point of the image side 72 of the seventh lens L7 and the optical axis O to the position on the optical axis O where the maximum effective radius of the image side 72 of the seventh lens L7 is located (i.e., the sagitta at the maximum effective semi-aperture of the image side 72 of the seventh lens L7).

[0072] By restricting the ratio of the sagitta of the image side 72 of the seventh lens L7 to the sagitta of the image side 62 of the sixth lens L6, the shapes of the image side 72 of the seventh lens L7 and the image side 62 of the sixth lens L6 can be constrained to correct the field curvature of the optical lens 100 and reduce the risk of ghost image generation, thereby improving the imaging quality of the optical lens 100. When the ratio is higher than the upper limit, the sagitta of the image side 72 of the seventh lens L7 is too large, making the image side 72 of the seventh lens L7 too curved, which is not conducive to the manufacturing, forming and assembly of the seventh lens L7 and easily leads to a decrease in the imaging quality of the optical lens 100.

[0073] In some embodiments, the optical lens 100 satisfies the relationship: 0.6<(SAG52-SAG61) / (R61-R52)<1.1, for example, (SAG52-SAG61) / (R61-R52)=0.601, 0.615, 0.624, 1.025, 1.032, 1.046, 1.068, 1.079, 1.085 or 1.094, etc. Wherein, SAG52 is the distance from the intersection of the image side surface 52 of the fifth lens L5 and the optical axis O to the maximum effective radius of the image side surface 52 of the fifth lens L5 on the optical axis O (i.e., the sag height at the maximum effective half-aperture of the image side surface 52 of the fifth lens L5), SAG61 is the distance from the intersection of the object side surface 61 of the sixth lens L6 and the optical axis O to the maximum effective radius of the object side surface 61 of the sixth lens L6 on the optical axis O (i.e., the sag height at the maximum effective half-aperture of the object side surface 61 of the sixth lens L6), R52 is the curvature radius of the image side surface 52 of the fifth lens L5 at the optical axis O, and R61 is the curvature radius of the object side surface 61 of the sixth lens L6 at the optical axis O.

[0074] By constraining the sag and curvature radius of the image-side surface 52 of the fifth lens L5 and the sag and curvature radius of the object-side surface 61 of the sixth lens L6, the shapes of the fifth lens L5 and the sixth lens L6 can be limited to reduce the surface complexity of the fifth lens L5 and the sixth lens L6, and improve the processability of the fifth lens L5 and the sixth lens L6. At the same time, the astigmatism of the optical lens 100 can be corrected, and the risk of ghost images of the fifth lens L5 and the sixth lens L6 can be reduced, thereby improving the imaging quality of the optical lens 100.

[0075] In some embodiments, the optical lens 100 satisfies the relationship: 0.65<(ET4+ET5+ET6) / CT46<1.2, for example, (ET4+ET5+ET6) / CT46=0.681, 0.705, 0.743, 0.786, 0.815, 1.005, 1.065, 1.114, 1.146 or 1.184. Wherein, ET4 is the distance from the maximum effective semi-diameter of the object-side surface 41 of the fourth lens L4 to the maximum effective semi-diameter of the image-side surface 42 of the fourth lens L4 in the direction parallel to the optical axis O (i.e., the edge thickness of the fourth lens L4), ET5 is the distance from the maximum effective semi-diameter of the object-side surface 51 of the fifth lens L5 to the maximum effective semi-diameter of the image-side surface 52 of the fifth lens L5 in the direction parallel to the optical axis O (i.e., the edge thickness of the fifth lens L5), ET6 is the distance from the maximum effective semi-diameter of the object-side surface 61 of the sixth lens L6 to the maximum effective semi-diameter of the image-side surface 62 of the sixth lens L6 in the direction parallel to the optical axis O (i.e., the edge thickness of the sixth lens L6), and CT46 is the distance from the object-side surface 41 of the fourth lens L4 to the image-side surface 62 of the sixth lens L6 on the optical axis O (i.e., the center thickness of the fourth lens L4 to the sixth lens L6).

[0076] By restricting the ratio of the edge thickness to the central thickness of the fourth lens L4 to the sixth lens L6, the space utilization rate of the optical lens 100 can be improved, which is beneficial to the miniaturization of the optical lens 100. At the same time, the difference between the central thickness and the edge thickness of the fourth lens L4 to the sixth lens L6 can be made smaller, so as to improve the stability of the optical lens 100, reduce the sensitivity of the optical lens 100 and the assembly difficulty of the lens, thereby improving the imaging quality of the optical lens 100.

[0077] In some embodiments, the optical lens 100 satisfies the relational expression: 0.8 < f1 / f23 < 1.4. For example, f1 / f23 = 0.816, 0.823, 0.845, 0.867, 0.872, 0.885, 1.325, 1.336, 1.357 or 1.386, etc. Wherein, f1 is the focal length of the first lens L1, and f23 is the combined focal length of the second lens L2 and the third lens L3.

[0078] By restricting the ratio of the focal length of the first lens L1 to the combined focal length of the second lens L2 and the third lens L3, the refractive powers of the first lens L1, the second lens L2 and the third lens L3 can be reasonably distributed, which is beneficial to correcting aberration. At the same time, the structure of the optical lens 100 can be reasonably arranged to reduce the difficulty of the structural arrangement of the optical lens 100, which is beneficial to the assembly of the optical lens 100 and improves the processing performance of the optical lens 100.

[0079] In some embodiments, the optical lens 100 satisfies the relational expression: -2.5 < f4567 / f23 < -0.5. For example, f4567 / f23 = -2.401, -2.364, -2.289, -2.167, -2.055, -0.964, -0.835, -0.741, -0.632 or -0.584, etc. Wherein, f23 is the combined focal length of the second lens L2 and the third lens L3, and f4567 is the combined focal length of the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7.

[0080] By restricting the ratio of the combined focal length of the fourth lens L4 to the seventh lens L7 to the combined focal length of the second lens L2 and the third lens L3, the rationality of the structural arrangement of the optical lens 100 can be further improved, which is beneficial to enabling the optical lens 100 to obtain a reasonable light deflection angle, thereby improving the imaging quality of the optical lens 100.

[0081] In some embodiments, the optical lens 100 satisfies the relational expressions: 3 < f / (f6 + f7) < 29, and / or, 1.34 < TTL / IMGH < 1.37. For example, f / (f6 + f7) = 3.136, 3.245, 3.338, 3.465, 3.569, 28.925, 28.954, 28.968, 28.981, or 28.995, etc., and TTL / IMGH = 1.3402, 1.3405, 1.3408, 1.3652, 1.3661, 1.3672, 1.3684, 1.3688, 1.3694, or 1.3698, etc. Wherein, f is the focal length of the optical lens 100, f6 is the focal length of the sixth lens L6, f7 is the focal length of the seventh lens L7, 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 (i.e., the total length of the optical lens 100), and IMGH is the radius of the maximum effective imaging circle of the optical lens 100 (i.e., the semi-image height of the optical lens 100).

[0082] By constraining the focal length of the optical lens 100 and the focal lengths of the sixth lens L6 and the seventh lens L7, the refractive power contribution amounts of the sixth lens L6 and the seventh lens L7 can be reasonably controlled to correct the spherical aberration generated by the first lens L1 to the fifth lens L5, thereby promoting the aberration balance of the optical lens 100 and improving the imaging quality of the optical lens 100.

[0083] In addition, by restricting the ratio of the total length of the optical lens 100 to the semi-image height, on the one hand, the total length of the optical lens 100 can be shortened, and the optical lens 100 can have a smaller size in the direction perpendicular to the optical axis O, which is beneficial to the miniaturization of the optical lens 100 and reduces the sensitivity of the optical lens 100. On the other hand, when the optical lens 100 obtains a smaller size, it can have a sufficiently large image surface to match a large-size image sensor, thereby increasing the pixels of the optical lens 100, which is beneficial to capturing more details of the object end, and further improving the imaging quality of the optical lens 100.

[0084] In addition, the object side and the image side of any one of the first lens L1 to the seventh lens L7 are aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0085]

[0086] Wherein, Z is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, c = 1 / Y, Y is the radius of curvature (i.e., the paraxial curvature c is the reciprocal of the Y radius in Table 1), k is the conic constant, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula.

[0087] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0088] First embodiment

[0089] The structural schematic diagram of the optical lens 100 disclosed in the first embodiment of the present application is as follows Figures 1 to 3 As shown, the optical lens 100 includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an infrared filter 80, which are sequentially arranged from the object side to the image side along the optical axis O. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 can be referred to the above specific embodiments, and will not be repeated here.

[0090] Furthermore, 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 negative refractive power, the fifth lens L5 has negative refractive power, the sixth lens L6 has positive refractive power, and the seventh lens L7 has negative refractive power.

[0091] Furthermore, the object-side surface 11 and the image-side surface 12 of the first lens L1 are convex and concave at the near optical axis O, respectively; the object-side surface 21 and the image-side surface 22 of the second lens L2 are convex and concave at the near optical axis O, respectively; the object-side surface 31 and the image-side surface 32 of the third lens L3 are both convex at the near optical axis O; the object-side surface 41 and the image-side surface 42 of the fourth lens L4 are concave and convex at the near optical axis O, respectively; the object-side surface 51 and the image-side surface 52 of the fifth lens L5 are convex and concave at the near optical axis O, respectively; the object-side surface 61 and the image-side surface 62 of the sixth lens L6 are convex and concave at the near optical axis O, respectively; the object-side surface 71 and the image-side surface 72 of the seventh lens L7 are convex and concave at the near optical axis O, respectively.

[0092] In the first embodiment, Figures 1 to 3 Schematic diagram of the optical lens 100 with the aperture STO in three different states, wherein: Figure 2 and Figure 3 The position of the diaphragm STO in the optical lens 100 does not change, only the focal plane changes. When the diaphragm STO is in three different states, the optical lens 100 can have different aperture numbers. Based on this, for the convenience of describing the three states of the diaphragm STO, Figure 1 The aperture STO in the state shown is called the aperture STO of the optical lens 100 in the first aperture state. Figure 2 The aperture STO in the state shown is called the aperture STO of the optical lens 100 in the second aperture state. Figure 3The aperture STO in the state shown is referred to as the aperture STO in the first aperture state of the optical lens 100. It can be understood that the aperture STO includes but is not limited to these three states, and by adjusting the distance D1 from the aperture STO to the object side surface 11 of the first lens L1, the opening size of the aperture STO, and the distance D2 from the infrared filter 80 to the imaging surface 101, the aperture STO can also have other different states, so that the optical lens 100 obtains different aperture numbers.

[0093] Specifically, taking the focal length f=6.313 mm of the optical lens 100 as an example, 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 sequence according to 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 2 and 3 correspond to the object side surface 11 and the image side surface 12 of the first lens L1, respectively. The Y radius in Table 1 is the radius of curvature of the object side surface or the image side surface of the corresponding surface number at the optical axis O. The first value in the "Thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the next surface on the optical axis O. The value of the aperture STO in the "Thickness" parameter column is the distance from the aperture STO to the vertex of the next surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O. By default, the direction from the object side surface 11 of the first lens L1 to the image side surface of the last lens is the positive direction of the optical axis O. When the value is negative, it indicates that the aperture STO is set on the image side of the 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 and Abbe number in Table 1 are all obtained at a reference wavelength of 587.6nm, and the reference wavelength of the focal length is 555nm.

[0094] Table 2 shows the distance D1 from the stop STO to the object side surface 11 of the first lens L1 in the direction parallel to the optical axis O, the distance D2 from the image side surface 17 to the imaging surface 18 of the filter 80, the aperture number FNO, the total optical length TTL, and the maximum field of view FOV of the optical lens 100 in the first embodiment from the first aperture state to the third aperture state. Among them, FNO1 is the first aperture state of the optical lens 100 (i.e., the state in which the aperture number of the optical lens 100 is the minimum value FNOmin), FNO2 is the second aperture state of the optical lens 100, and FNO3 is the third aperture state of the optical lens 100 (i.e., the state in which the aperture number of the optical lens 100 is the maximum value FNOmax).

[0095] The k in Table 3 is a cone constant, and Table 3 gives the high-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical mirror surface in the first embodiment.

[0096] Table 1

[0097]

[0098]

[0099] Table 2

[0100] First embodiment D1(Unit: mm) D2(unit: mm) FNO FOV (unit: degree) TTL (unit: mm) FNO1 -0.100 0.512 1.480 84.298 7.930 FNO2 0.101 0.515 2.000 84.281 7.933 FNO3 0.101 0.516 2.800 84.271 7.933

[0101] Table 3

[0102]

[0103] See also Figures 4 to 6 In (A), Figure 4 , Figure 5 , Figure 6 (A) in the figure shows the longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 650.00nm, 610.00nm, 555.00nm, 510.00nm, 470.00nm and 435.00nm respectively in the first aperture state, the second aperture state and the third aperture state. 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. Figures 4 to 6 As can be seen from (A) in the first aperture state (such as Figure 4 ), the second aperture state (such as Figure 5 ) and the third aperture state (such as Figure 6 ), the spherical aberration value of the optical lens 100 in the first embodiment is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0104] See also Figures 4 to 6 In (B), Figure 4 , Figure 5 , Figure 6 (B) in the figure shows the astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 555.00 nm in the first aperture state, the second aperture state, and the third aperture state. 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. T in the astigmatism diagram represents the curvature of the imaging surface 101 in the meridian direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figures 4 to 6 As can be seen from (B) in the figure, at this wavelength, the first aperture state (such as Figure 4 ), the second aperture state (such as Figure 5 ) and the third aperture state (such as Figure 6 )'s astigmatism of the optical lens 100 is better compensated.

[0105] See also Figures 4 to 6 (C) in Figure 4 , Figure 5 , Figure 6 (C) in FIG. 1 shows the distortion curves of the optical lens 100 in the first embodiment at a wavelength of 555.00 nm in the first aperture state, the second aperture state, and the third aperture state. 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. Figures 4 to 6 As can be seen from (C) in the figure, at this wavelength, the first aperture state (such as Figure 4 ), the second aperture state (such as Figure 5 ) and the third aperture state (such as Figure 6 )'s optical lens 100 has been well corrected for distortion.

[0106] Second embodiment

[0107] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of the present application is as follows Figures 7 to 9 As shown, the optical lens 100 includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an infrared filter 80 arranged in sequence along the optical axis O from the object side to the image side. The materials thereof can be referred to the above-mentioned specific embodiments, which will not be repeated here. Further, the fourth lens L4 has a positive refractive power, the object side surface 31 and the image side surface 32 of the third lens L3 are convex and concave at the near optical axis O, respectively, and the object side surface 41 and the image side surface 42 of the fourth lens L4 are convex and concave at the near optical axis O, respectively. The refractive power, i.e., the surface type setting of the remaining lenses is the same as that of the first embodiment, which will not be repeated here.

[0108] In the second embodiment, Figures 7 to 9 A schematic diagram of the optical lens 100 is shown with the aperture STO in three different states. For the description of the aperture STO in the three different states, please refer to the aforementioned embodiment, which will not be repeated here.

[0109] Specifically, the focal length f=6.224 mm of the optical lens 100 is taken as an example. Other parameters in the second embodiment are given in Table 4, Table 5 and Table 6 below, and the definitions of each parameter can be obtained from the description of the aforementioned embodiment, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 4 are all mm, and the refractive index and Abbe number in Table 4 are all obtained at a reference wavelength of 587.6 nm, and the reference wavelength of the focal length is 555 nm.

[0110] Table 4

[0111]

[0112]

[0113] Table 5

[0114] Second embodiment D1(Unit: mm) D2(unit: mm) FNO FOV (unit: degree) TTL (unit: mm) FNO1 -0.100 0.512 1.480 85.040 7.930 FNO2 0.101 0.515 2.000 85.022 7.933 FNO3 0.101 0.516 2.800 85.013 7.933

[0115] Table 6

[0116]

[0117] See also Figures 10 to 12 ,Depend on Figures 10 to 12 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the figure that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled in the first aperture state, the second aperture state and the third aperture state, so that the optical lens 100 of this embodiment has good imaging quality. Figures 10 to 12 (A) Figures 10 to 12 Middle (B) and Figures 10 to 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figures 4 to 6 (A) Figures 4 to 6 (B) Figures 4 to 6 The contents described in (C) will not be repeated here.

[0118] Third embodiment

[0119] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of the present application is as follows: Figures 13 to 15 As shown, the optical lens 100 includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an infrared filter 80 arranged in sequence along the optical axis O from the object side to the image side. The materials thereof can be referred to the above-mentioned specific embodiments, which will not be repeated here. Further, the fifth lens L5 has a positive refractive power, and the object side surface 41 and the image side surface 42 of the fourth lens L4 are both concave at the near optical axis O. The refractive power of the remaining lenses, i.e., the surface type setting, is the same as that of the first embodiment, which will not be repeated here.

[0120] In the third embodiment, Figures 13 to 15 A schematic diagram of the optical lens 100 is shown with the aperture STO in three different states. For the description of the aperture STO in the three different states, please refer to the aforementioned embodiment, which will not be repeated here.

[0121] Specifically, the focal length f of the optical lens 100 is 6.059 mm. Other parameters in the third embodiment are given in the following Tables 7, 8 and 9, and the definitions of each parameter can be obtained from the description of the aforementioned embodiment, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 7 are all mm, and the refractive index and Abbe number in Table 7 are all obtained at a reference wavelength of 587.6 nm, and the reference wavelength of the focal length is 555 nm.

[0122] Table 7

[0123]

[0124] Table 8

[0125]

[0126]

[0127] Table 9

[0128]

[0129] See also Figures 16 to 18 ,Depend on Figures 16 to 18 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the figure that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled in the first aperture state, the second aperture state and the third aperture state, so that the optical lens 100 of this embodiment has good imaging quality. Figures 16 to 18 (A) Figures 16 to 18 (B) and Figures 16 to 18 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figures 4 to 6 (A) Figures 4 to 6 (B) Figures 4 to 6 The contents described in (C) will not be repeated here.

[0130] Fourth embodiment

[0131] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of the present application is as follows: Figures 19 to 21 As shown, the optical lens 100 includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an infrared filter 80 arranged in sequence along the optical axis O from the object side to the image side. The materials thereof can be referred to the above-mentioned specific embodiments, which will not be repeated here. Further, the object side surface 41 and the image side surface 42 of the fourth lens L4 are both concave surfaces near the optical axis O. The refractive power, i.e., the surface type setting of the remaining lenses is the same as that of the first embodiment, which will not be repeated here.

[0132] In the fourth embodiment, Figures 19 to 21 A schematic diagram of the optical lens 100 is shown with the aperture STO in three different states. For the description of the aperture STO in the three different states, please refer to the aforementioned embodiment, which will not be repeated here.

[0133] Specifically, the focal length f of the optical lens 100 is 5.987 mm. Other parameters in the fourth embodiment are given in the following Tables 10, 11 and 12, and the definitions of each parameter can be obtained from the description of the aforementioned embodiment, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 10 are all mm, and the refractive index and Abbe number in Table 10 are all obtained at a reference wavelength of 587.6 nm, and the reference wavelength of the focal length is 555 nm.

[0134] Table 10

[0135]

[0136] Table 11

[0137] Fourth embodiment D1(Unit: mm) D2(unit: mm) FNO FOV (unit: degree) TTL (unit: mm) FNO1 -0.100 0.512 1.480 87.480 7.796 FNO2 0.101 0.515 2.000 87.458 7.799 FNO3 0.101 0.516 2.800 87.448 7.799

[0138] Table 12

[0139]

[0140]

[0141] See also Figure 22 to Figure 24 ,Depend on Figure 22 to Figure 24 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the figure that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled in the first aperture state, the second aperture state and the third aperture state, so that the optical lens 100 of this embodiment has good imaging quality. Figure 22 to Figure 24 (A) Figure 22 to Figure 24 (B) and Figure 22 to Figure 24 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figures 4 to 6 (A) Figures 4 to 6 (B) Figures 4 to 6 The contents described in (C) will not be repeated here.

[0142] Fifth embodiment

[0143] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of the present application is as follows Figure 25 to Figure 27As shown, the optical lens 100 includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an infrared filter 80 arranged in sequence along the optical axis O from the object side to the image side. The materials thereof can be referred to the above-mentioned specific embodiments, which will not be repeated here. Furthermore, the object side surface 41 and the image side surface 42 of the fourth lens L4 are both concave surfaces near the optical axis O, and the refractive power, i.e., the surface shape setting of the remaining lenses are the same as those in the first embodiment, which will not be repeated here.

[0144] In the fifth embodiment, Figure 25 to Figure 27 A schematic diagram of the optical lens 100 is shown with the aperture STO in three different states. For the description of the aperture STO in the three different states, please refer to the aforementioned embodiment, which will not be repeated here.

[0145] Specifically, the focal length f=5.96 mm of the optical lens 100 is taken as an example. The other parameters in the fifth embodiment are given in the following Tables 13, 14 and 15, and the definitions of the parameters can be obtained from the description of the aforementioned embodiments, and are not repeated here. It can be understood that the units of the Y radius, thickness, and focal length in Table 13 are all mm, and the refractive index and Abbe number in Table 13 are all obtained at a reference wavelength of 587.6 nm, and the reference wavelength of the focal length is 555 nm.

[0146] Table 13

[0147]

[0148] Table 14

[0149] Fifth embodiment D1(Unit: mm) D2(unit: mm) FNO FOV (unit: degree) TTL (unit: mm) FNO1 -0.100 0.512 1.480 89.052 7.846 FNO2 0.101 0.515 2.000 89.031 7.849 FNO3 0.101 0.516 2.800 89.020 7.849

[0150] Table 15

[0151]

[0152]

[0153] See also Figures 28 to 30 ,Depend on Figures 28 to 30 It can be seen from the longitudinal spherical aberration diagram (A), astigmatism diagram (B) and distortion curve diagram (C) in the figure that the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled in the first aperture state, the second aperture state and the third aperture state, so that the optical lens 100 of this embodiment has good imaging quality. Figures 28 to 30 (A) Figures 28 to 30 (B) and Figures 28 to 30 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment. Figures 4 to 6 (A) Figures 4 to 6(B) Figures 4 to 6 The contents described in (C) will not be repeated here.

[0154] Please refer to Table 16, which is a summary of the ratios of various relationship equations in the first to fifth embodiments of the present application.

[0155] Table 16

[0156]

[0157] See also Fig.31 In the second aspect, the present application further discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any one of the first embodiment to the fifth embodiment of the first aspect 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 has the characteristics of a variable aperture while meeting the requirements of miniaturization. Since the above technical effects have been described in detail in the embodiment of the optical lens 100, they will not be described in detail here.

[0158] See also Fig.32 In the third aspect, the present application further discloses an electronic device 300, which includes a housing 301 and a camera module 200 as described in the second aspect, and the camera module 200 is arranged in the housing 301. 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 having the above-mentioned camera module 200 also has all the technical effects of the above-mentioned optical lens. That is, while meeting the requirements of miniaturization, it has the characteristics of a variable aperture. Since the above-mentioned technical effects have been described in detail in the embodiment of the optical lens, they will not be repeated here.

[0159] The first, second, third and various numerical numbers involved in this document are only distinguished for the convenience of description and are not intended to limit the scope of the present application.

[0160] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0161] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical lens, characterized in that: There are a total of seven lenses with refractive power, which sequentially include, from the object side to the image side along the optical axis: The first lens, having positive refractive power, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; The second lens, having negative refractive power, the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; The third lens, having positive refractive power, the object side surface of the third lens is convex near the optical axis; The fourth lens, having refractive power; The fifth lens, having refractive power, the object side surface of the fifth lens is convex near the optical axis, and the image side surface of the fifth lens is concave near the optical axis; The sixth lens, having positive refractive power, the object side surface of the sixth lens is convex near the optical axis, and the image side surface of the sixth lens is concave near the optical axis; The seventh lens, having negative refractive power, the object side surface of the seventh lens is convex near the optical axis, and the image side surface of the seventh lens is concave near the optical axis; The optical lens satisfies the following relational expressions: 1.85 < FNOmax / FNOmin < 2.1, 2 < SAG72 / SAG62 < 5; Wherein, FNOmax is the maximum aperture number of the optical lens, FNOmin is the minimum aperture number of the optical lens, SAG62 is the sag at the maximum effective radius of the image side surface of the sixth lens, and SAG72 is the sag at the maximum effective radius of the image side surface of the seventh lens.

2. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expression: -55 < R62 / SAG62 < -40; Wherein, R62 is the radius of curvature of the image side surface of the sixth lens at the optical axis.

3. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expression: 0.6 < ET7 / CT7 < 0.8; Wherein, ET7 is the edge thickness of the seventh lens, and CT7 is the thickness of the seventh lens on the optical axis.

4. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expression: 0.6 < (SAG52 - SAG61) / (R61 - R52) < 1.1; Wherein, SAG52 is the sag at the maximum effective radius of the image side surface of the fifth lens, SAG61 is the sag of the maximum effective radius of the object side surface of the sixth lens, R52 is the radius of curvature of the image side surface of the fifth lens at the optical axis, and R61 is the radius of curvature of the object side surface of the sixth lens at the optical axis.

5. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expression: 0.65 < (ET4 + ET5 + ET6) / CT46 < 1.2; Wherein, ET4 is the edge thickness of the fourth lens, ET5 is the edge thickness of the fifth lens, ET6 is the edge thickness of the sixth lens, and CT46 is the distance on the optical axis from the object side surface of the fourth lens to the image side surface of the sixth lens.

6. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expression: 0.8 < f1 / f23 < 1.4; and / or, -2.5 < f4567 / f23 < -0.5; Wherein, f1 is the focal length of the first lens, f23 is the combined focal length of the second lens and the third lens, and f4567 is the combined focal length of the fourth lens, the fifth lens, the sixth lens, and the seventh lens.

7. The optical lens according to claim 1, characterized in that: The optical lens satisfies the relational expressions: 3 < f / (f6 + f7) < 29; and / or, 1.34 < TTL / IMGH < 1.37; Wherein, f is the focal length of the optical lens, f6 is the focal length of the sixth lens, f7 is the focal length of the seventh lens, TTL is the total length of the optical lens, and IMGH is the radius of the maximum effective imaging circle of the optical 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.

Images