Optical lens, camera module and electronic device

Abstract

The application discloses an optical lens, a camera module and electronic equipment, and relates to the technical field of optical lenses.The optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens.The first lens has negative refractive power, and the object side and the image side are respectively concave and convex.The second lens has negative refractive power, and the object side and the image side are respectively convex and concave.The third lens has refractive power, and the object side and the image side are respectively convex and concave.The fourth lens has positive refractive power, and the object side and the image side are both convex.The fifth lens has refractive power, and the object side and the image side are respectively concave and convex.The sixth lens has refractive power, and the seventh lens has negative refractive power.The object side and the image side are respectively convex and concave.The optical lens satisfies the following relationship: 1.2 < Imgh / f < 1.5.The optical lens, the camera module and the electronic equipment provided by the application can realize miniaturization while taking into account the wide-angle function, and have good imaging quality.

Description

Technical Field

[0001] This invention relates to the field of optical imaging technology, and more particularly to an optical lens, a camera module, and an electronic device. Background Technology

[0002] With the development of technology, users have increasingly higher requirements for optical lenses. They not only pursue miniaturization but also wide-angle characteristics, that is, a large field of view and a short focal length. This allows them to capture a large area of ​​scenery even at a short shooting distance, so that they can better match the image sensor of the camera module in electronic devices and thus achieve good image quality. However, most current camera module optical lenses are difficult to simultaneously achieve both miniaturization and wide-angle functionality. Summary of the Invention

[0003] This invention discloses an optical lens, a camera module, and an electronic device that can achieve miniaturization while maintaining wide-angle functionality, so that the optical lens has good imaging quality.

[0004] To achieve the above objectives, in a first aspect, the present invention discloses an optical lens comprising seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens arranged sequentially along the optical axis from the object side to the image side;

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

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

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

[0008] The fourth lens has positive refractive power, and both the object-side and image-side surfaces of the fourth lens are convex near the optical axis.

[0009] The fifth lens has refractive power, the object side of the fifth lens is concave near the optical axis, and the image side of the fifth lens is convex near the optical axis.

[0010] The sixth lens has refractive power;

[0011] The seventh lens has negative refractive power, the object side of the seventh lens is convex near the optical axis, and the image side of the seventh lens is concave near the optical axis.

[0012] The optical lens satisfies the following relational expression:

[0013] 1.2<Imgh / f<1.5;

[0014] Wherein, Imgh is half of the image height corresponding to the maximum field angle of the optical lens, and f is the focal length of the optical lens.

[0015] In the optical lens provided by the present application, on the basis of realizing a miniaturized design and taking into account the requirement for good resolution, by reasonably configuring the refractive powers of the seven lenses, that is, by arranging the first lens and the second lens to have negative refractive powers, the design of two lenses with negative refractive power can enable light to enter the optical lens better, and at the same time can increase the field angle of the optical lens; cooperating with the design that the object side and the image side of the first lens are respectively a concave surface and a convex surface near the optical axis, the distortion of the optical lens can be effectively corrected, and the optical performance of the optical lens can be improved. The object side and the image side of the second lens are respectively a convex surface and a concave surface near the optical axis, which can well correct the coma generated by the optical lens. The third lens with refractive power, cooperating with the design that its object side and image side are respectively a convex surface and a concave surface near the optical axis, is beneficial to correcting the astigmatism generated by the optical lens and improving the imaging quality of the optical lens. The fourth lens with positive refractive power is beneficial to the convergence of light of the optical lens, and at the same time is beneficial to correcting the spherical aberration of the optical lens. Cooperating with the design that both the object side and the image side of the fourth lens are convex surfaces near the optical axis, it is beneficial for the optical lens to reduce the influence of high-order astigmatism. The fifth lens and the sixth lens have refractive power, and cooperating with the design that the object side and the image side of the fifth lens are respectively a concave surface and a convex surface near the optical axis, it can help correct the field curvature of the optical lens and improve the imaging quality of the optical lens. The seventh lens with negative refractive power, cooperating with the design that its object side and image side are respectively a convex surface and a concave surface near the optical axis, can correct the high-order astigmatism generated by the optical lens, and further improve the imaging quality of the optical lens.

[0016] Further, in the seven-lens type of the optical lens, a plurality of lenses adopt the design of convex-concave and concave-convex lenses, which can reduce the thickness of each lens of the optical lens on the optical axis, thereby reducing the overall length of the optical lens, and is beneficial to the miniaturized design of the optical lens.

[0017] Further, by limiting the optical lens to satisfy the relational expression: 1.2<Imgh / f<1.5, the wide-angle characteristic of the optical lens can be realized, which is beneficial to increasing the light incident range of the field of view of the optical lens, expanding the field angle, facilitating the shooting of a larger area of scenery, and enabling the optical lens to have good imaging quality.

[0018] As an optional implementation manner, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0019] 0.5<R9 / R10<1; and / or, -1<R6 / R9<-0.5; and / or, 0.1<(R7+R8) / (R7-R8)<0.3;

[0020] wherein R9 is the radius of curvature of the object-side surface of the fifth lens at the optical axis, R10 is the radius of curvature of the image-side surface of the fifth lens at the optical axis, R7 is the radius of curvature of the object-side surface of the fourth lens at the optical axis, R8 is the radius of curvature of the image-side surface of the fourth lens at the optical axis, and R6 is the radius of curvature of the image-side surface of the third lens at the optical axis.

[0021] By controlling the ratio of the radius of curvature of the object-side surface of the fifth lens at the optical axis to the radius of curvature of the image-side surface of the fifth lens at the optical axis, the optical power borne by the fifth lens in the entire optical lens can be effectively controlled, and the high-order coma of the optical lens can be balanced, which is beneficial to improving the imaging quality of the optical lens. In addition, controlling this ratio is conducive to controlling the surface shapes of the object-side surface and the image-side surface of the fifth lens, so as to reduce the manufacturing sensitivity of the fifth lens, and further facilitate the processing and manufacturing of the fifth lens.

[0022] Through the ratio of the radius of curvature of the image-side surface of the third lens at the optical axis to the radius of curvature of the object-side surface of the fifth lens at the optical axis, the aberration of the optical lens can be effectively balanced, the sensitivity of the optical lens can be reduced, and the imaging performance of the optical lens can be improved. When the value is lower than the lower limit of the above relational expression, the sensitivity of the optical lens will increase, which is not conducive to the processing and manufacturing of the third lens and the fifth lens; when the value is higher than the upper limit of the above relational expression, it is difficult to correct the field curvature aberration of the optical lens, resulting in poor imaging performance of the optical lens.

[0023] By controlling the ratio of the sum of the radii of curvature of the object-side surface and the image-side surface of the fourth lens at the optical axis to the difference between the radii of curvature of the object-side surface and the image-side surface of the fourth lens at the optical axis, the radii of curvature of the object-side surface and the image-side surface of the fourth lens at the optical axis can be controlled within a reasonable range, so as to control the surface shapes of the object-side surface and the image-side surface of the fourth lens, facilitate the processing and manufacturing of the fourth lens, and also help to improve the astigmatism of the optical lens, thereby being beneficial to improving the imaging quality of the optical lens.

[0024] As an optional implementation manner, in the embodiments of the first aspect of the present invention, the optical lens satisfies the following relational expressions:

[0025] -1<R1 / f<-0.7, and / or, 1<R3 / f<1.6; and / or, 0.6<R6 / f<0.7; and / or, -1.1<R9 / f<-0.6; and / or, 1.5<|R12| / f<31;

[0026] wherein R6 is the radius of curvature of the image side of the third lens at the optical axis, R1 is the radius of curvature of the object side of the first lens at the optical axis, R3 is the radius of curvature of the object side of the second lens at the optical axis, R9 is the radius of curvature of the object side of the fifth lens at the optical axis, and R12 is the radius of curvature of the image side of the sixth lens at the optical axis.

[0027] By controlling the ratio of the radius of curvature of the object side of the first lens at the optical axis to the focal length of the optical lens, the optical power of the first lens can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the first lens in the optical lens, and further beneficial to balancing the high-order coma of the optical lens, so that the optical lens has good imaging quality.

[0028] By controlling the ratio of the radius of curvature of the object side of the second lens at the optical axis to the focal length of the optical lens, the optical power of the second lens can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the second lens in the optical lens, and further beneficial to balancing the astigmatism of the optical lens, so that the optical lens has good imaging quality.

[0029] By controlling the ratio of the radius of curvature of the image side of the third lens at the optical axis to the focal length of the optical lens, the optical power of the third lens can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the third lens in the optical lens, and further beneficial to balancing the spherical aberration of the optical lens, so that the optical lens has good imaging quality.

[0030] By controlling the ratio of the radius of curvature of the object side of the fifth lens at the optical axis to the focal length of the optical lens, the optical power of the fifth lens can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the fifth lens in the optical lens, and further beneficial to balancing the high-order coma of the optical lens, so that the optical lens has good imaging quality.

[0031] By controlling the ratio of the radius of curvature of the image side of the sixth lens at the optical axis to the focal length of the optical lens, the optical power of the sixth lens can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the sixth lens in the optical lens, and further beneficial to balancing the field curvature of the optical lens, so that the optical lens has good imaging quality.

[0032] As an optional implementation, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expressions:

[0033] 2.5<CT4 / CT5<6.5; and / or, 2.0<CT4 / CT7<3;

[0034] Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

[0035] By controlling the ratio of the thickness of the fourth lens on the optical axis to the thickness of the fifth lens on the optical axis, the processing and shaping of the fourth and fifth lenses can meet the process requirements while ensuring the overall length of the optical lens, thus facilitating the processing and manufacturing of the fourth and fifth lenses.

[0036] Since the fourth lens is the intermediate lens of the optical lens, and the seventh lens is the lens closest to the imaging plane of the optical lens, by controlling the ratio of the thickness of the fourth lens on the optical axis to the thickness of the seventh lens on the optical axis, the advanced aberrations generated by the optical lens can be effectively balanced. At the same time, it is beneficial to adjust the field curvature of the fourth and seventh lenses during the manufacturing process, thereby improving the imaging quality of the optical lens.

[0037] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship:

[0038] 1.9 <f / D<2.1;

[0039] Where D is the entrance pupil diameter of the optical lens.

[0040] By controlling the ratio of the focal length to the entrance pupil diameter of the optical lens, the large aperture characteristic of the optical lens can be effectively guaranteed, thus allowing sufficient light to enter the lens and making the images captured by the optical lens clearer. At the same time, it can also improve low-light shooting conditions, making the optical lens suitable for shooting in low-light environments such as night scenes, rainy days, and starry skies, and has a better bokeh effect.

[0041] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship:

[0042] 3.9 < |f3 / f| < 36;

[0043] Where f3 is the focal length of the third lens.

[0044] By controlling the ratio of the focal length of the optical lens to the focal length of the third lens, the optical power borne by the third lens in the entire optical lens can be effectively controlled, so that its optical power is not too strong. This can correct the higher-order spherical aberration of the optical lens and give the optical lens good image quality.

[0045] As an optional implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relationship:

[0046] 0.7<ET3 / CT3<1;

[0047] Wherein, ET3 is the distance in the direction parallel to the optical axis from the maximum effective half-aperture of the object-side surface of the third lens to the maximum effective half-aperture of the image-side surface of the third lens (i.e., the edge thickness of the third lens), and CT3 is the thickness of the third lens on the optical axis (i.e., the center thickness of the third lens). In this way, both the edge thickness and the center thickness of the third lens can be controlled within a reasonable range, so that the third lens has good processing yield and good optical performance, which is beneficial to the assembly stability of the third lens in the optical lens.

[0048] As an optional implementation, in the embodiment of the first aspect of the present invention, the optical lens satisfies the following relational expression:

[0049] 0.05<SAG11 / SD11<0.2; and / or, 0.1<SAG72 / SD72<0.3; and / or, 1.2<SD11 / SD72<1.5;

[0050] Wherein, SAG11 is the distance in the optical axis direction from the maximum effective aperture of the object-side surface of the first lens to the intersection point of the object-side surface of the first lens and the optical axis (i.e., the sag of the object-side surface of the first lens), SD11 is the maximum effective half-aperture of the object-side surface of the first lens, SAG72 is the distance in the optical axis direction from the maximum effective aperture of the image-side surface of the seventh lens to the intersection point of the image-side surface of the seventh lens and the optical axis (i.e., the sag of the image-side surface of the seventh lens), and SD72 is the maximum effective half-aperture of the image-side surface of the seventh lens.

[0051] By controlling the ratio of the sag of the object-side surface of the first lens to the maximum effective half-aperture of the object-side surface of the first lens, the shape and thickness of the first lens can be effectively constrained, so that the overall thickness of the first lens is uniform, which facilitates the molding and processing of the first lens, and is also beneficial to reducing the processing sensitivity and assembly sensitivity of the first lens.

[0052] By controlling the ratio of the sag of the image-side surface of the seventh lens to the maximum effective half-aperture of the image-side surface of the seventh lens, the shape and thickness of the seventh lens can be effectively constrained, so that the overall thickness of the seventh lens is uniform, which facilitates the molding and processing of the seventh lens, and is also beneficial to reducing the processing sensitivity and assembly sensitivity of the seventh lens.

[0053] By controlling the ratio of the maximum effective half-aperture of the object side of the first lens to the maximum effective half-aperture of the image side of the seventh lens, the deflection angle of edge field rays entering the imaging surface of the optical lens and the image sensor can be effectively reduced. This allows light to enter the imaging surface of the optical lens and the image sensor more smoothly, thereby increasing the matching degree between the optical lens and the image sensor. It also helps to improve the off-axis field astigmatism of the optical lens, thus improving the imaging quality of the optical lens.

[0054] Secondly, the present invention discloses a camera module, which includes an image sensor and an optical lens as described in the first aspect above, wherein the image sensor is disposed on the image side of the optical lens. The camera module with the aforementioned optical lens can achieve miniaturization while maintaining wide-angle functionality, resulting in good image quality.

[0055] Thirdly, the present invention discloses an electronic device comprising a housing and a camera module as described in the second aspect above, the camera module being disposed within the housing. The electronic device having the aforementioned camera module can achieve miniaturization while maintaining wide-angle functionality, resulting in good image quality.

[0056] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0057] In the optical lens provided by the present application, on the basis of realizing a miniaturized design and while meeting good resolution requirements, reasonable configuration of the refractive powers of the seven lenses is adopted, that is, the first lens and the second lens are configured to have negative refractive power. The design of two lenses with negative refractive power enables light to enter the optical lens more smoothly, and can also increase the field of view angle of the optical lens; combined with the design that the object-side surface and the image-side surface of the first lens are respectively a concave surface and a convex surface near the optical axis, the distortion of the optical lens can be effectively corrected, and the optical performance of the optical lens is improved. The object-side surface and the image-side surface of the second lens are respectively a convex surface and a concave surface near the optical axis, which can well correct the coma generated by the optical lens. The third lens with refractive power, combined with the design that its object-side surface and image-side surface are respectively a convex surface and a concave surface near the optical axis, is beneficial to correcting the astigmatism generated by the optical lens and improving the imaging quality of the optical lens. The fourth lens with positive refractive power is beneficial to the convergence of light of the optical lens, and is also beneficial to correcting the spherical aberration of the optical lens; combined with the design that both the object-side surface and the image-side surface of the fourth lens are convex surfaces near the optical axis, it is beneficial for the optical lens to reduce the influence of high-order astigmatism. The fifth lens and the sixth lens have refractive power, and combined with the design that the object-side surface and the image-side surface of the fifth lens are respectively a concave surface and a convex surface near the optical axis, it helps to correct the field curvature of the optical lens and improve the imaging quality of the optical lens. The seventh lens with negative refractive power, combined with the design that its object-side surface and image-side surface are respectively a convex surface and a concave surface near the optical axis, can correct the high-order astigmatism generated by the optical lens, and further improve the imaging quality of the optical lens.

[0058] Further, among the seven lenses of the optical lens, a plurality of lenses adopt the design of convex-concave and concave-convex lenses, which can reduce the thickness of each lens of the optical lens on the optical axis, thereby reducing the overall length of the optical lens and facilitating the miniaturization design of the optical lens.

[0059] Further, the optical lens is also defined to satisfy the relational expression: 1.2<Imgh / f<1.5, so that the wide-angle characteristic of the optical lens can be realized, which is beneficial to increasing the light incident range of the field of view of the optical lens, expanding the field of view angle, facilitating the shooting of scenes with a relatively large area, and enabling the optical lens to have good imaging quality. Brief Description of the Drawings

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0061] Figure 1 is a schematic structural diagram of the optical lens disclosed in the first embodiment of the present application;

[0062] Figure 2 The diagrams show the longitudinal spherical aberration (mm), astigmatism curve (mm), and distortion curve (%) of the optical lens disclosed in the first embodiment of this application.

[0063] Figure 3 This is a schematic diagram of the structure of the optical lens disclosed in the second embodiment of this application;

[0064] Figure 4 The diagrams show the longitudinal spherical aberration (mm), astigmatism (mm), and distortion (%) of the optical lens disclosed in the second embodiment of this application.

[0065] Figure 5 This is a schematic diagram of the structure of the optical lens disclosed in the third embodiment of this application;

[0066] Figure 6 The diagrams show the longitudinal spherical aberration (mm), astigmatism curve (mm), and distortion curve (%) of the optical lens disclosed in the third embodiment of this application.

[0067] Figure 7 This is a schematic diagram of the structure of the optical lens disclosed in the fourth embodiment of this application;

[0068] Figure 8 The diagrams show the longitudinal spherical aberration (mm), astigmatism (mm), and distortion (%) of the optical lens disclosed in the fourth embodiment of this application.

[0069] Figure 9 This is a schematic diagram of the structure of the optical lens disclosed in the fifth embodiment of this application;

[0070] Figure 10 The diagrams shown in the fifth embodiment of this application are the longitudinal spherical aberration diagram (mm), astigmatism curve diagram (mm), and distortion curve diagram (%) of the optical lens.

[0071] Figure 11 This is a schematic diagram of the structure of the optical lens disclosed in the sixth embodiment of this application;

[0072] Figure 12 The diagrams show the longitudinal spherical aberration (mm), astigmatism (mm), and distortion (%) of the optical lens disclosed in the sixth embodiment of this application.

[0073] Figure 13 This is a schematic diagram of the camera module disclosed in this application;

[0074] Figure 14 This is a schematic diagram of the structure of the electronic device disclosed in this application. Detailed Implementation

[0075] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0076] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0077] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0078] Please see Figure 1 According to a first aspect of this application, an optical lens 100 is disclosed, which includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 arranged sequentially along the optical axis O from the object side to the image side.

[0079] Among them, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has either positive or negative refractive power, the fourth lens L4 has positive refractive power, the fifth lens L5 has either negative or positive refractive power, the sixth lens L6 has either positive or negative refractive power, and the seventh lens L7 has negative refractive power. During imaging, light rays enter the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, and the seventh lens L7 sequentially from the object side of the first lens L1, and finally form an image on the imaging plane 101 of the optical lens 100.

[0080] Furthermore, the object-side surface 11 of the first lens L1 is concave near the optical axis O, and the image-side surface 12 of the first lens L1 is convex near the optical axis O; the object-side surface 21 of the second lens L2 is convex near the optical axis O, and the image-side surface 22 of the second lens L2 is concave near the optical axis O; the object-side surface 31 of the third lens L3 is convex near the optical axis O, and the image-side surface 32 of the third lens L3 is concave near the optical axis O; the object-side surface 41 of the fourth lens L4 is concave near the optical axis O. The image-side surface 42 of the fourth lens L4 is convex near the optical axis O; the object-side surface 51 of the fifth lens L5 is concave near the optical axis O, and the image-side surface 52 of the fifth lens L5 is convex near the optical axis O; the object-side surface 61 of the sixth lens L6 is either concave or convex near the optical axis O, and the image-side surface 62 of the sixth lens L6 is either convex or concave near the optical axis O; the object-side surface 71 of the seventh lens is convex near the optical axis O, and the image-side surface 72 of the seventh lens is concave near the optical axis O.

[0081] In some embodiments, the optical lens 100 can be applied to electronic devices such as smartphones and tablets. Therefore, the materials of the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7 can be plastic to achieve the thinness and lightness of the optical lens 100 while making it easier to process complex lens shapes. It is understood that in other embodiments, when the optical lens 100 is applied to electronic devices such as in-vehicle devices and dashcams, or used as a camera on a car body, the first lens L1, second lens L2, third lens L3, fourth lens L4, fifth lens L5, sixth lens L6, and seventh lens L7 can all be glass lenses. This provides good optical performance while reducing the temperature sensitivity of the optical lens 100.

[0082] In some embodiments, the optical lens 100 further includes an aperture stop 102, which can be an aperture stop and / or a field stop, and can be disposed between the third lens L3 and the fourth lens L4. It is understood that in other embodiments, the aperture stop 102 can also be disposed between other two lenses; for example, the aperture stop 102 can also be disposed between the fourth lens L4 and the fifth lens L5. The specific arrangement can be adjusted according to actual conditions, and this embodiment does not impose specific limitations.

[0083] In some embodiments, the optical lens 100 further includes a filter 103, and the filter 103 is disposed between the ninth lens L9 and the imaging plane 101 of the optical lens 100. Optionally, the filter 103 may be an infrared cut filter. The use of the infrared cut filter can filter out infrared light, improve imaging quality, and make the imaging more consistent with the visual experience of the human eye. It can be understood that the filter 103 may be made of coated optical glass, colored glass, or a filter 103 of other materials, which can be selected according to actual needs, and no specific limitation is made in this embodiment.

[0084] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.2<Imgh / f<1.5; where Imgh is half of the image height corresponding to the maximum field of view of the optical lens 100, and f is the focal length of the optical lens 100.

[0085] When the optical lens 100 satisfies the relational expression 1.2<Imgh / f<1.5, the wide-angle characteristic of the optical lens 100 can be realized, which is beneficial to increasing the light incident range of the field of view of the optical lens 100, expanding the field of view, facilitating the photographing of a large-area scene, and enabling the optical lens 100 to have good imaging quality.

[0086] In some embodiments, the optical lens 100 satisfies the following relational expression 0.5<R9 / R10<1; where R9 is the radius of curvature of the object side surface of the fifth lens L5 at the optical axis, and R10 is the radius of curvature of the image side surface of the fifth lens L5 at the optical axis. By controlling the ratio of the radius of curvature of the object side surface of the fifth lens L5 at the optical axis to the radius of curvature of the image side surface of the fifth lens L5 at the optical axis, the optical power borne by the fifth lens L5 in the entire optical lens 100 can be effectively controlled, and the high-order coma of the optical lens 100 can be balanced, which is beneficial to improving the imaging quality of the optical lens 100. In addition, controlling this ratio is beneficial to controlling the surface shapes of the object side surface and the image side surface of the fifth lens L5, thereby reducing the manufacturing sensitivity of the fifth lens L5, and further facilitating the processing and manufacturing of the fifth lens L5.

[0087] In some embodiments, the optical lens 100 satisfies the following relational expression: -1<R6 / R9<-0.5, where R6 is the radius of curvature of the image side of the third lens L3 at the optical axis, and R9 is the radius of curvature of the object side of the fifth lens L5 at the optical axis. Through the ratio of the radius of curvature of the image side of the third lens L3 at the optical axis to the radius of curvature of the object side of the fifth lens L5 at the optical axis, the aberration of the optical lens 100 can be effectively balanced, the sensitivity of the optical lens 100 can be reduced, and the imaging performance of the optical lens 100 can be improved. When the value is lower than the lower limit of the above relational expression, the sensitivity of the optical lens 100 will increase, which is not conducive to the processing and manufacturing of the third lens L3 and the fifth lens L5; when the value is higher than the upper limit of the above relational expression, it is difficult to correct the field curvature aberration of the optical lens 100, resulting in poor imaging performance of the optical lens 100.

[0088] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.1<(R7+R8) / (R7-R8)<0.3, where R7 is the radius of curvature of the object side of the fourth lens L4 at the optical axis, and R8 is the radius of curvature of the image side of the fourth lens L4 at the optical axis. By controlling the ratio of the sum of the radii of curvature of the object side and the image side of the fourth lens L4 at the optical axis to the difference between the radii of curvature of the object side and the image side of the fourth lens L4 at the optical axis, the radii of curvature of the object side and the image side of the fourth lens L4 at the optical axis can be controlled within a reasonable range, so as to control the surface profiles of the object side and the image side of the fourth lens L4, facilitate the processing and manufacturing of the fourth lens L4, and at the same time help to improve the astigmatism of the optical lens 100, thereby contributing to the improvement of the imaging quality of the optical lens 100.

[0089] In some embodiments, the optical lens 100 satisfies the following relational expression: -1<R1 / f<-0.7, where R1 is the radius of curvature of the object side of the first lens L1 at the optical axis, and f is the focal length of the optical lens 100. By controlling the ratio of the radius of curvature of the object side of the first lens L1 at the optical axis to the focal length of the optical lens 100, the optical power of the first lens L1 can be controlled within a reasonable range, which is beneficial to balancing the optical power borne by the first lens L1 in the optical lens 100, and further beneficial to balancing the high-order coma of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0090] In some embodiments, the optical lens 100 satisfies the following relational expression: 1<R3 / f<1.6; where R3 is the radius of curvature of the object-side surface of the second lens L2 at the optical axis. By controlling the ratio of the radius of curvature of the object-side surface of the second lens L2 at the optical axis to the focal length of the optical lens 100, the optical power of the second lens L2 can be controlled within a reasonable range, which is beneficial to balancing the optical power undertaken by the second lens L2 in the optical lens 100, and further beneficial to balancing the astigmatism of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0091] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.6<R6 / f<0.7, where R6 is the radius of curvature of the image-side surface of the third lens L3 at the optical axis. By controlling the ratio of the radius of curvature of the image-side surface of the third lens L3 at the optical axis to the focal length of the optical lens 100, the optical power of the third lens L3 can be controlled within a reasonable range, which is beneficial to balancing the optical power undertaken by the third lens L3 in the optical lens 100, and further beneficial to balancing the spherical aberration of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0092] In some embodiments, the optical lens 100 satisfies the following relational expression: -1.1<R9 / f<-0.6. Where R9 is the radius of curvature of the object-side surface of the fifth lens L5 at the optical axis. By controlling the ratio of the radius of curvature of the object-side surface of the fifth lens L5 at the optical axis to the focal length of the optical lens 100, the optical power of the fifth lens L5 can be controlled within a reasonable range, which is beneficial to balancing the optical power undertaken by the fifth lens L5 in the optical lens 100, and further beneficial to balancing the high-order coma of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0093] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.5<|R12| / f<31; where R12 is the radius of curvature of the image-side surface of the sixth lens L6 at the optical axis. By controlling the ratio of the radius of curvature of the image-side surface of the sixth lens L6 at the optical axis to the focal length of the optical lens 100, the optical power of the sixth lens L6 can be controlled within a reasonable range, which is beneficial to balancing the optical power undertaken by the sixth lens L6 in the optical lens 100, and further beneficial to balancing the field curvature of the optical lens 100, so that the optical lens 100 has good imaging quality.

[0094] In some embodiments, the optical lens 100 satisfies the following relational expression: 2.5<CT4 / CT5<6.5; where CT4 is the thickness of the fourth lens L4 on the optical axis, and CT5 is the thickness of the fifth lens L5 on the optical axis. By controlling the ratio of the thickness of the fourth lens L4 on the optical axis to the thickness of the fifth lens L5 on the optical axis, it is possible to make the processing and molding of the fourth lens L4 and the fifth lens L5 meet the process requirements while ensuring the overall length of the optical lens 100, thereby facilitating the processing and manufacturing of the fourth lens L4 and the fifth lens L5.

[0095] In some embodiments, the optical lens 100 satisfies the following relational expression: 2.0<CT4 / CT7<3; where CT7 is the thickness of the seventh lens L7 on the optical axis. Since the fourth lens L4 is the middle lens of the optical lens 100, and the seventh lens L7 is the lens of the optical lens 100 closest to the imaging plane 101, by controlling the ratio of the thickness of the fourth lens L4 on the optical axis to the thickness of the seventh lens L7 on the optical axis, high-order aberrations generated by the optical lens 100 can be effectively balanced, and at the same time, it is beneficial to the field curvature adjustment of the fourth lens L4 and the seventh lens L7 during the processing and manufacturing process, which is further conducive to improving the imaging quality of the optical lens 100.

[0096] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.9<f / D<2.1; D is the entrance pupil diameter of the optical lens 100. By controlling the ratio of the focal length of the optical lens 100 to the entrance pupil diameter of the optical lens 100, the characteristic of the optical lens 100 with a large aperture can be effectively ensured, so that the optical lens 100 has a sufficient light intake, making the image captured by the optical lens 100 clearer, and at the same time, the low-light shooting conditions can be improved, making the optical lens 100 suitable for shooting in low-light environments such as night scenes, rainy days, and starry skies, and having a better blurring effect.

[0097] In some embodiments, the optical lens 100 satisfies the following relational expression: 3.9<|f3 / f|<36;

[0098] where f3 is the focal length of the third lens L3. By controlling the ratio of the focal length of the optical lens 100 to the focal length of the third lens L3, the optical power borne by the third lens L3 in the entire optical lens 100 can be effectively controlled, so that its optical power is not too strong, thereby correcting the high-order spherical aberration of the optical lens 100, and enabling the optical lens 100 to have good imaging quality.

[0099] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.7 < ET3 / CT3 < 1; where ET3 is the distance in the direction parallel to the optical axis from the maximum effective half-caliber of the object-side surface of the third lens L3 to the maximum effective half-caliber of the image-side surface of the third lens L3 (i.e., the edge thickness of the third lens L3), and CT3 is the thickness of the third lens L3 on the optical axis (i.e., the center thickness of the third lens L3). In this way, both the edge thickness and the center thickness of the third lens L3 can be controlled within a reasonable range, so that the third lens L3 has good processing yield and good optical performance, which is beneficial to the assembly stability of the third lens L3 in the optical lens 100.

[0100] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.05 < SAG11 / SD11 < 0.2, where SAG11 is the distance in the optical axis direction from the maximum effective caliber of the object-side surface of the first lens L1 to the intersection point of the object-side surface of the first lens L1 and the optical axis (i.e., the sagittal height of the object-side surface of the first lens L1), and SD11 is the maximum effective half-caliber of the object-side surface of the first lens L1. By controlling the ratio of the sagittal height of the object-side surface of the first lens L1 to the maximum effective half-caliber of the object-side surface of the first lens L1, the shape and thickness of the first lens L1 can be effectively restricted, so that the overall thickness of the first lens L1 is uniform, which facilitates the molding and processing of the first lens L1, and is also beneficial to reducing the processing sensitivity and assembly sensitivity of the first lens L1.

[0101] In some embodiments, the optical lens 100 satisfies the following relational expression: 0.1 < SAG72 / SD72 < 0.3, where SAG72 is the distance in the optical axis direction from the maximum effective caliber of the image-side surface of the seventh lens L7 to the intersection point of the image-side surface of the seventh lens L7 and the optical axis (i.e., the sagittal height of the image-side surface of the seventh lens L7), and SD72 is the maximum effective half-caliber of the image-side surface of the seventh lens L7. By controlling the ratio of the sagittal height of the image-side surface of the seventh lens L7 to the maximum effective half-caliber of the image-side surface of the seventh lens L7, the shape and thickness of the seventh lens L7 can be effectively restricted, so that the overall thickness of the seventh lens L7 is uniform, which facilitates the molding and processing of the seventh lens L7, and is also beneficial to reducing the processing sensitivity and assembly sensitivity of the seventh lens L7.

[0102] In some embodiments, the optical lens 100 satisfies the following relational expression: 1.2<SD11 / SD72<1.5. By controlling the ratio of the maximum effective half-aperture of the object-side surface of the first lens L1 to the maximum effective half-aperture of the image-side surface of the seventh lens L7, the deflection angle of the off-axis field-of-view light entering the imaging surface 101 of the optical lens 100 and the image sensor can be effectively reduced, so that the light can enter the imaging surface 101 of the optical lens 100 and the image sensor more gently, which is beneficial to increasing the matching degree between the optical lens 100 and the image sensor, and is also beneficial to improving the astigmatism of the off-axis field of the optical lens 100, thereby enhancing the imaging quality of the optical lens 100.

[0103] The optical lens 100 of this embodiment will be described in detail below with reference to specific parameters.

[0104] First Embodiment

[0105] The schematic structural diagram of the optical lens 100 disclosed in the first embodiment of the present application is as shown in Figure 1 the figure, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a diaphragm 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7 and an optical filter 103, which are sequentially arranged from the object side to the image side along the optical axis O.

[0106] Further, the first lens L1 has negative refractive power, the second lens L2 has negative refractive power, the third lens L3 has positive refractive power, the fourth lens L4 has positive 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.

[0107] Further, the object-side surface 11 and the image-side surface 12 of the first lens L1 are respectively a concave surface and a convex surface at the position close to the optical axis O; the object-side surface 21 and the image-side surface 22 of the second lens L2 are respectively a convex surface and a concave surface at the position close to the optical axis O; the object-side surface 31 and the image-side surface 32 of the third lens L3 are respectively a convex surface and a concave surface at the position close to the optical axis O; the object-side surface 41 and the image-side surface 42 of the fourth lens L4 are both convex surfaces at the position close to the optical axis O; the object-side surface 51 and the image-side surface 52 of the fifth lens L5 are respectively a concave surface and a convex surface at the position close to the optical axis O; the object-side surface 61 and the image-side surface 62 of the sixth lens L6 are respectively a convex surface and a concave surface at the optical axis O; the object-side surface 71 and the image-side surface 72 of the seventh lens L7 are respectively a convex surface and a concave surface at the optical axis O.

[0108] Specifically, taking an optical lens 100 with a focal length f = 3.04 mm, an aperture number FNO = 2.0, a maximum field of view (FOV) of 105.7 degrees, and a total length (TTL) of 7.0053 mm as an example, other parameters of the optical lens 100 are given in Table 1 below. The elements along the optical axis O of the optical lens 100 from the object side to the image side are arranged sequentially according to the order of the elements in Table 1 from top to bottom. In the same lens, the surface with the smaller surface number is the object side of the lens, and the surface with the larger surface number is the image side of the lens. For example, surface numbers 1 and 2 correspond to the object side and image side of the first lens L1, respectively. The Y-radius in Table 1 is the radius of curvature of the object side or image side of the corresponding surface number at the optical axis 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 of the lens to the next surface on the optical axis O. The value of aperture 102 in the "Thickness" parameter column represents the distance from aperture 102 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 of the first lens L1 to the image side of the last lens is the positive direction of the optical axis O. When this value is negative, it indicates that aperture 102 is set on the image side of the vertex of the next surface. If the thickness of aperture 102 is positive, aperture 102 is on the object side of the vertex of the next surface. It can be understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. Moreover, the refractive index, Abbe number, etc. in Table 1 are all obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm.

[0109] Furthermore, the surface numbers 1 and 2 in the lower surface 1 and lower surface 2 correspond to the object side 11 and image side 12 of the first lens L1, respectively; the surface numbers 3 and 4 correspond to the object side 21 and image side 22 of the second lens L2, respectively; and so on, the surface numbers 13 and 14 correspond to the object side 71 and image side 72 of the seventh lens L7, respectively.

[0110] In the first embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens are aspherical surfaces, and the surface shape x of each aspherical lens can be defined using, but is not limited to, the following aspherical formula:

[0111]

[0112] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis O; c is the curvature of the aspherical surface at the optical axis O, c = 1 / Y (i.e., the paraxial curvature c is the reciprocal of the radius of curvature Y in Table 1 below); K is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for surfaces 1-14 in the first embodiment.

[0113] Table 1

[0114]

[0115] Table 2

[0116]

[0117]

[0118] Please see Figure 2 (A) in the middle Figure 2 Figure (A) shows the longitudinal spherical aberration curves of the optical lens 100 in the first embodiment at wavelengths of 435.84 nm, 486.13 nm, 546.07 nm, 587.56 nm, and 656.28 nm. Figure 2 In (A), the horizontal coordinate along the X-axis represents the focal shift, and the vertical coordinate along the Y-axis represents the normalized field of view. Figure 2 As can be seen from (A) in the first embodiment, the spherical aberration value of the optical lens 100 is better, indicating that the imaging quality of the optical lens 100 in this embodiment is better.

[0119] Please see Figure 2 (B) in the middle Figure 2 (B) in the figure shows the light astigmatism diagram of the optical lens 100 in the first embodiment at a wavelength of 546.07 nm. The horizontal axis along the X-axis represents the focus shift, and the vertical axis along the Y-axis represents the image height, both in mm. In the astigmatism curve diagram, T represents the curvature of the imaging surface 101 in the meridional direction, and S represents the curvature of the imaging surface 101 in the sagittal direction. Figure 2 As can be seen from (B) in the figure, the astigmatism of the optical lens 100 is well compensated at this wavelength.

[0120] Please see Figure 2 (C) in the middle, Figure 2 (C) in the figure is a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546.07 nm. The horizontal axis along the X-axis represents distortion, and the vertical axis along the Y-axis represents image height, in mm. Figure 2 As can be seen from (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546.07nm.

[0121] Second Embodiment

[0122] The structural schematic diagram of the optical lens 100 disclosed in the second embodiment of this application is shown below. Figure 3As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 103 arranged sequentially along the optical axis O from the object side to the image side.

[0123] Furthermore, in the refractive power design of the first lens L1 to the seventh lens L7, unlike the first embodiment, in the second embodiment, the sixth lens L6 has a negative refractive power.

[0124] Furthermore, in the second embodiment, the object-side and image-side surfaces of the first lens L1 to the seventh lens L7 at near the optical axis are the same as in the first embodiment, and will not be described again here.

[0125] Specifically, the parameters of the optical lens 100 are given in Table 3 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. It is understood that the units for the Y-radius, thickness, and focal length in Table 3 are all mm, and the refractive index, Abbe number, etc., in Table 3 are obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm. Furthermore, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the foregoing first embodiment; it will not be repeated here.

[0126] In the second embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical. The calculation method for the surface shape x of each aspherical lens can be derived from the description of the foregoing embodiments, and will not be repeated here. Table 4 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical lens in the second embodiment.

[0127] Table 3

[0128]

[0129]

[0130] Table 4

[0131]

[0132] Please see Figure 4 ,Depend on Figure 4 As can be seen from (A) the longitudinal spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, thus the optical system 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 4 (A) Figure 4 (B) and Figure 4The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0133] Third Embodiment

[0134] The structural schematic diagram of the optical lens 100 disclosed in the third embodiment of this application is shown below. Figure 5 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 103 arranged sequentially along the optical axis O from the object side to the image side.

[0135] Furthermore, in the refractive power design of the first lens L1 to the seventh lens L7, unlike the first embodiment, in the third embodiment, the sixth lens L6 has a negative refractive power.

[0136] Furthermore, among the object-side and image-side surfaces near the optical axis of the first lens L1 to the seventh lens L7, only the object-side surface 61 and image-side surface 62 of the sixth lens L6 are concave surfaces, while the object-side and image-side surfaces near the optical axis of the other lenses are the same as those in the first embodiment.

[0137] Specifically, the parameters of the optical lens 100 are given in Table 5 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. It is understood that the units for the Y-radius, thickness, and focal length in Table 5 are all mm, and the refractive index, Abbe number, etc., in Table 5 are obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm. Furthermore, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned first embodiment, which will not be repeated here.

[0138] In the third embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical. The calculation method for the surface shape x of each aspherical lens can be derived from the description of the foregoing embodiments, and will not be repeated here. Table 6 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical lens in the third embodiment.

[0139] Table 5

[0140]

[0141] Table 6

[0142]

[0143]

[0144] Please see Figure 6 ,Depend on Figure 6 As can be seen from (A) the longitudinal spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, thus the optical system 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 6 (A) Figure 6 (B) and Figure 6 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0145] Fourth embodiment

[0146] The structural schematic diagram of the optical lens 100 disclosed in the fourth embodiment of this application is shown below. Figure 7 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 103 arranged sequentially along the optical axis O from the object side to the image side.

[0147] Furthermore, in this embodiment, the refractive power of the first lens L1 to the seventh lens L7 is the same as that in the first embodiment.

[0148] Furthermore, in this embodiment, only the object-side surface 61 and image-side surface 62 of the sixth lens L6 are convex near the optical axis, while the object-side surface and image-side surface of the other lenses are the same as those in the first embodiment near the optical axis.

[0149] Specifically, the parameters of the optical lens 100 are given in Table 7 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. It is understood that the units for the Y-radius, thickness, and focal length in Table 7 are all mm, and the refractive index, Abbe number, etc., in Table 7 are obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm. Furthermore, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned first embodiment, which will not be repeated here.

[0150] In the fourth embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical. The calculation method for the surface shape x of each aspherical lens can be derived from the description of the foregoing embodiments, and will not be repeated here. Table 8 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical lens in the fourth embodiment.

[0151] Table 7

[0152]

[0153] Table 8

[0154]

[0155]

[0156] Please see Figure 8 ,Depend on Figure 8 As can be seen from (A) the longitudinal spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, thus the optical system 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 8 (A) Figure 8 (B) and Figure 8 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0157] Fifth embodiment

[0158] The structural schematic diagram of the optical lens 100 disclosed in the fifth embodiment of this application is shown below. Figure 9 As shown, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, an aperture stop 102, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 103 arranged sequentially along the optical axis O from the object side to the image side.

[0159] Furthermore, in the refractive power design of the first lens L1 to the seventh lens L7, unlike the first embodiment, in this embodiment, the fifth lens L5 has positive refractive power and the sixth lens L6 has negative refractive power.

[0160] Furthermore, in this embodiment, only the object-side surface 61 and image-side surface 62 of the sixth lens L6 are concave near the optical axis, while the object-side surface and image-side surface of the other lenses are the same as those in the first embodiment near the optical axis.

[0161] Specifically, the parameters of the optical lens 100 are given in Table 9 below. The definitions of each parameter can be derived from the description of the aforementioned embodiments and will not be repeated here. It is understood that the units for the Y-radius, thickness, and focal length in Table 9 are all mm, and the refractive index, Abbe number, etc., in Table 9 are obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm. Furthermore, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the aforementioned first embodiment, which will not be repeated here.

[0162] In the fifth embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical. The calculation method for the surface shape x of each aspherical lens can be derived from the description of the foregoing embodiments, and will not be repeated here. Table 10 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical lens in the fifth embodiment.

[0163] Table 9

[0164]

[0165]

[0166] Table 10

[0167]

[0168]

[0169] Please see Figure 10 ,Depend on Figure 10 As can be seen from (A) the longitudinal spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, thus the optical system 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 10 (A) Figure 10 (B) and Figure 10 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0170] Sixth Embodiment

[0171] The structural schematic diagram of the optical lens 100 disclosed in the sixth embodiment of this application is shown below. Figure 11As shown, the optical lens 100 includes a first lens L1, a second lens L2, an aperture stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter 103 arranged sequentially along the optical axis O from the object side to the image side.

[0172] Furthermore, in the refractive power design of the first lens L1 to the seventh lens L7, unlike the first embodiment, in the sixth embodiment, the third lens L3 has negative refractive power and the sixth lens L6 has negative refractive power.

[0173] Furthermore, in this embodiment, the object-side and image-side surfaces of the first lens L1 to the seventh lens L7 at near the optical axis are the same as in the first embodiment, and will not be described again here.

[0174] Specifically, the parameters of the optical lens 100 are given in Table 11 below. The definitions of each parameter can be derived from the description of the foregoing embodiments and will not be repeated here. It is understood that the units for the Y-radius, thickness, and focal length in Table 11 are all mm, and the refractive index, Abbe number, etc., in Table 11 are obtained at a reference wavelength of 587.56 nm, and the focal length is obtained at a reference wavelength of 546.07 nm. Furthermore, regarding the correspondence between the surface numbers and the object-side and image-side surfaces of each lens, please refer to the description in the foregoing first embodiment, which will not be repeated here.

[0175] In the sixth embodiment, the object-side surface and image-side surface of any one of the first lens L1 to the seventh lens L7 are aspherical. The calculation method for the surface shape x of each aspherical lens can be derived from the description of the foregoing embodiments, and will not be repeated here. Table 12 below gives the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical lens in the sixth embodiment.

[0176] Table 11

[0177]

[0178]

[0179] Table 12

[0180]

[0181] Please see Figure 12 ,Depend on Figure 12 As can be seen from (A) the longitudinal spherical aberration curve, (B) the ray astigmatism curve, and (C) the distortion curve, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, thus the optical system 100 of this embodiment possesses good imaging quality. Furthermore, regarding... Figure 12 (A) Figure 12(B) and Figure 12 The wavelengths corresponding to the curves in (C) can be referred to in the first embodiment regarding... Figure 2 (A) Figure 2 (B) Figure 2 The content described in (C) will not be repeated here.

[0182] Refer to Table 13, which summarizes the ratios of the relationships in the first to sixth embodiments of this application.

[0183] Table 13

[0184]

[0185]

[0186] Please see Figure 13 This application also discloses a camera module 200, which includes an image sensor 201 and an optical lens 100 as described in any of the first to sixth embodiments of the first aspect above. The image sensor 201 is disposed 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 onto the image sensor 201. The image sensor 201 is used to convert the light signal corresponding to the subject into an image signal, which will not be elaborated here. It can be understood that the camera module 200 with the above-described optical lens 100 has all the technical effects of the above-described optical lens 100, that is, it can achieve miniaturization while also taking into account wide-angle function. Since the above-described technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0187] Please see Figure 14 This application also discloses an electronic device 300, which includes a housing 301 and the aforementioned camera module 200, with the camera module 200 disposed within the housing. Specifically, the camera module 200 can be disposed inside the housing 301 or on the housing 301. The electronic device 300 can be, but is not limited to, a mobile phone, tablet computer, laptop computer, smartwatch, monitor, etc. It is understood that the electronic device 300 with the aforementioned camera module 200 also possesses all the technical effects of the aforementioned optical lens 100. That is, it enables the electronic device 300 to achieve miniaturization while also providing wide-angle functionality. Since the aforementioned technical effects have been described in detail in the embodiments of the optical lens 100, they will not be repeated here.

[0188] The optical lens, camera module, and electronic device disclosed in the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the optical lens, camera module, and electronic device of the present invention and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An optical lens, characterized in that, There are seven lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens arranged in sequence from the object side to the image side along the optical axis; The first lens has negative refractive power, the object side surface of the first lens is a concave surface near the optical axis, and the image side surface of the first lens is a convex surface near the optical axis; The second lens has negative refractive power, the object side surface of the second lens is a convex surface near the optical axis, and the image side surface of the second lens is a concave surface near the optical axis; The third lens has refractive power, the object side surface of the third lens is a convex surface near the optical axis, and the image side surface of the third lens is a concave surface near the optical axis; The fourth lens has positive refractive power, and both the object side surface and the image side surface of the fourth lens are convex surfaces near the optical axis; The fifth lens has refractive power, the object side surface of the fifth lens is a concave surface near the optical axis, and the image side surface of the fifth lens is a convex surface near the optical axis; The sixth lens has refractive power; The seventh lens has negative refractive power, the object side surface of the seventh lens is a convex surface near the optical axis, and the image side surface of the seventh lens is a concave surface near the optical axis; The optical lens satisfies the following relational expressions: 1.2<Imgh / f<1.5; 1.9<f / D<2.1; Wherein, D is the entrance pupil diameter of the optical lens, Imgh is half of the image height corresponding to the maximum field of view of the optical lens, and f is the focal length of the optical lens.

2. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 0.5<R9 / R10<1; and / or, -1<R6 / R9<-0.5; and / or, 0.1<(R7+R8) / (R7-R8)<0.3; Wherein, R9 is the curvature radius of the object side surface of the fifth lens at the optical axis, R10 is the curvature radius of the image side surface of the fifth lens at the optical axis, R7 is the curvature radius of the object side surface of the fourth lens at the optical axis, R8 is the curvature radius of the image side surface of the fourth lens at the optical axis, and R6 is the curvature radius of the image side surface of the third lens at the optical axis.

3. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: -1<R1 / f<-0.7, and / or, 1<R3 / f<1.6; and / or, 0.6<R6 / f<0.7; and / or, -1.1<R9 / f<-0.6; and / or, 1.5<|R12| / f<31; Wherein, R6 is the curvature radius of the image side surface of the third lens at the optical axis, R1 is the curvature radius of the object side surface of the first lens at the optical axis, R3 is the curvature radius of the object side surface of the second lens at the optical axis, R9 is the curvature radius of the object side surface of the fifth lens at the optical axis, and R12 is the curvature radius of the image side surface of the sixth lens at the optical axis.

4. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 2.5<CT4 / CT5<6.5; and / or, 2.0<CT4 / CT7<3; Wherein, CT4 is the thickness of the fourth lens on the optical axis, CT5 is the thickness of the fifth lens on the optical axis, and CT7 is the thickness of the seventh lens on the optical axis.

5. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expressions: 3.9<|f3 / f|<36; wherein f3 is the focal length of the third lens.

6. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expression: 0.7<ET3 / CT3<1; wherein ET3 is the distance in the direction parallel to the optical axis from the maximum effective half-caliber of the object-side surface of the third lens to the maximum effective half-caliber of the image-side surface of the third lens, and CT3 is the thickness of the third lens on the optical axis.

7. The optical lens according to claim 1, characterized in that, The optical lens satisfies the following relational expression: 0.05<SAG11 / SD11<0.2; and / or, 0.1<SAG72 / SD72<0.3; and / or, 1.2<SD11 / SD72<1.5; wherein SAG11 is the distance in the optical axis direction from the maximum effective caliber of the object-side surface of the first lens to the intersection point of the object-side surface of the first lens and the optical axis, SD11 is the maximum effective half-caliber of the object-side surface of the first lens, SAG72 is the distance in the optical axis direction from the maximum effective caliber of the image-side surface of the seventh lens to the intersection point of the image-side surface of the seventh lens and the optical axis, and SD72 is the maximum effective half-caliber of the image-side surface of the seventh lens.

8. A camera module, characterized in that, The camera module comprises an image sensor and the optical lens according to any one of claims 1 to 7, wherein the image sensor is arranged on the image side of the optical lens.

9. An electronic device, characterized in that, The electronic device comprises a housing and the camera module according to claim 8, wherein the camera module is arranged on the housing.

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