CN114114655B

CN114114655B - Optical lens, camera module, electronic equipment and car

Info

Publication number: CN114114655B
Application number: CN202111370928.5A
Authority: CN
Inventors: 王欢; 乐宇明; 兰宾利
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2023-09-05
Anticipated expiration: 2041-11-18
Also published as: CN114114655A

Abstract

The invention discloses an optical lens, an image pickup module, electronic equipment and an automobile, wherein the optical lens comprises the following components in sequence from an object side to an image side along an optical axis: the first lens element with negative refractive power has a convex object-side surface and a concave image-side surface, the second lens element with negative refractive power has a concave object-side surface and a convex image-side surface, the third lens element with positive refractive power has a concave object-side surface and a convex image-side surface, the fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface, the fifth lens element with positive refractive power has a convex object-side surface and a convex image-side surface, the sixth lens element with positive refractive power has a concave object-side surface and a concave image-side surface, the seventh lens element with negative refractive power has a convex object-side surface and a convex image-side surface. The optical lens, the camera module, the electronic equipment and the automobile provided by the invention can realize miniaturization of the optical lens, can realize the characteristics of large aperture and wide angle, and can improve imaging definition.

Description

Optical lens, camera module, electronic equipment and car

Technical Field

The present invention relates to the field of optical imaging technologies, and in particular, to an optical lens, a camera module, an electronic device, and an automobile.

Background

Along with the development of intelligent control, the requirements on a camera device installed on mechanical equipment (such as a mobile phone, a computer, a robot, an automobile and the like) are higher and higher, and the functions of monitoring, detecting and the like of the electronic equipment are realized by utilizing a camera module so as to realize intelligent control. However, due to the miniaturization development trend of various mechanical devices, the installation space of the camera module is limited greatly, and in the existing camera module, the wide angle cannot be realized when the miniaturization design requirement is met, so that the imaging definition of the camera module is reduced.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, an image pickup module, electronic equipment and an automobile, which can meet the miniaturization design requirement of the optical lens and realize the wide-angle characteristic of the optical lens at the same time so as to improve the imaging definition.

In order to achieve the above object, in a first aspect, the present invention discloses an optical lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens disposed in order from an object side to an image side along an optical axis;

the first lens element with negative refractive power has a convex object-side surface at a paraxial region and a concave image-side surface at a paraxial region;

The second lens element with negative refractive power has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region;

the third lens element with positive refractive power has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region;

the fourth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;

the fifth lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;

the sixth lens element with negative refractive power has a concave object-side surface at a paraxial region and a concave image-side surface at a paraxial region;

the seventh lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region.

In the optical lens provided by the application, the first lens has negative refractive power, and the first lens can receive incident light rays with larger angles by matching with the surface type design that the object side surface and the image side surface of the first lens are respectively convex and concave, so that the field angle range of the optical lens is enlarged to obtain the characteristic of large field angle, and meanwhile, the sensitivity of the optical lens can be reduced, and the imaging quality of the optical lens is improved; the second lens element with negative refractive power has a concave object-side surface and concave image-side surface, so that transition of incident light rays with a large angle is more gentle; the positive refractive power of the third lens element and the fourth lens element can balance the aberration generated by the incident light passing through the first lens element and the second lens element, and further converge the incident light, so that the total optical length of the optical lens element can be shortened, and the miniaturized design of the optical lens element can be realized; the fifth lens element with positive refractive power and the sixth lens element with negative refractive power can balance aberration generated by each other, can reduce tolerance sensitivity of the optical lens element, and can improve imaging quality of the optical lens element; the seventh lens element with positive refractive power has a convex object-side surface and a convex image-side surface, so that aberration generated by the optical lens element can be effectively corrected, distortion is reduced, and an MTF (modulation transfer function) curve of the optical lens element is more concentrated, thereby improving imaging definition of the optical lens element.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:

2.5＜FOV/CRA＜4.5；

wherein FOV is the maximum field angle of the optical lens, CRA is the chief ray incidence angle of the maximum field of view of the optical lens.

In the shooting process, the influence of the incident angle of the incident light on the imaging quality of the optical lens is large, when the incident angle of the incident light is overlarge, but the view angle of the optical lens is not large enough, the optical lens cannot well receive the incident light with a large angle, and the incident light with a large angle cannot be incident on the image sensor of the shooting module at a proper angle, so that the imaging effect of the optical lens is poor. Therefore, when the optical lens meets the relation, the optical lens can realize a large field angle and simultaneously enable incident light rays to be emitted onto the image sensor of the image pickup module at a proper angle, so that the photosensitivity of the image sensor is improved, and the imaging quality of the optical lens is improved.

10＜|nd2-nd3|*100＜16.5；

Where nd2 is the refractive index of the second lens, and nd3 is the refractive index of the third lens.

The refractive indexes of the second lens and the third lens are reasonably configured, so that the second lens and the third lens provide proper refractive power for the optical lens, the aberration of the optical lens can be corrected, the resolution of the optical lens is improved, and the imaging quality of the optical lens is improved.

0.25＜|((SD S1)/(RDY S1))|*100＜0.35；

wherein SD S1 is the effective half-caliber of the object side surface of the first lens, and RDY S1 is the radius of curvature of the object side surface of the first lens at the optical axis.

The effective half caliber of the lens can influence the bending degree of the lens and the processing difficulty of the lens, and when the first lens meets the relation, the processing and manufacturing difficulty of the first lens can be reduced, and the production yield of the first lens is improved; meanwhile, the limitation of the relational expression can avoid the generation of ghost so as to improve the imaging quality of the optical lens.

0.15＜ImgH/TTL＜0.25；

Wherein ImgH is the radius of the maximum effective imaging circle of the optical lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis, that is, the total length of the optical lens.

When the optical lens satisfies the above relation, the total length of the optical lens can be controlled within a proper range while improving the imaging quality of the optical lens, thereby realizing miniaturization and high-quality imaging of the optical lens.

-2＜f1/f＜-1.5；

wherein f1 is the focal length of the first lens, and f is the effective focal length of the optical lens.

The first lens is the lens closest to the object side in the optical lens, when the first lens is set to be the lens with negative refractive power, the optical lens can receive incident light rays with a large angle, the field angle range of the optical lens is enlarged, and the optical lens with a large field angle is further obtained; meanwhile, sensitivity of the optical lens can be reduced and miniaturization of the optical lens can be achieved by limiting a focal length of the first lens and an effective focal length of the optical lens.

-2.85＜f56/f＜-2.45；

wherein f56 is a combined focal length of the fifth lens and the sixth lens, and f is an effective focal length of the optical lens.

The fifth lens and the sixth lens form a cemented lens with a negative combined focal length, so that the assembly sensitivity of the optical lens can be reduced, the processing technology difficulty of the optical lens is further reduced, and the assembly yield of the optical lens is improved; and when the optical lens meets the relation, the chromatic aberration of the optical lens can be effectively corrected, the eccentric sensitivity of the optical lens can be reduced, the chromatic aberration of the optical lens can be balanced, and the imaging quality of the optical lens can be improved.

0.5＜ΣCT/TTL＜0.75；

wherein Σct is the sum of the thicknesses of the first lens element to the seventh lens element on the optical axis, and TTL is the distance between the object side surface of the first lens element and the imaging surface of the optical lens element on the optical axis, i.e. the total length of the optical lens element.

When the optical lens meets the relation, the positions and the center thicknesses of the lenses of the optical lens can be reasonably configured, the compact structure of the lenses is ensured, and the total length of the optical lens is shortened to meet the miniaturization design requirement of the optical lens.

1.4≤f/EPD≤1.5；

wherein f is the effective focal length of the optical lens, and EPD is the entrance pupil diameter of the optical lens.

The definition of the relation can enable the effective focal length and the entrance pupil diameter of the optical lens to be reasonably configured, can achieve the characteristic that the optical lens has a large aperture, and meanwhile achieve the shorter total length of the optical lens, and can achieve the characteristics of wide angle and miniaturization of the optical lens, so that the imaging quality of the optical lens and the shooting effect under the wide angle condition can be improved.

0.5＜R13/f7≤1；

wherein R13 is a radius of curvature of the object side surface of the seventh lens at the optical axis, and f7 is a focal length of the seventh lens.

Since the seventh lens element has positive refractive power, when the positive refractive power of the seventh lens element is excessive, the angle of deflection of the incident light beam in the optical lens element is excessive, which affects the imaging quality of the optical lens element, and the excessive positive refractive power also affects the correction of the aberration of the optical lens element, which further affects the imaging quality of the optical lens element. Through the limitation of the relational expression, the refractive power of the seventh lens can be reasonably configured, so that the seventh lens provides reasonable positive refractive power for the optical lens, the condition that the deflection angle of incident light rays in the optical lens is overlarge can be avoided, the sensitivity of the optical lens is further reduced, and the imaging quality of the optical lens is improved.

9＜|nd4-nd5|*100＜11；

where nd4 is the refractive index of the fourth lens, and nd5 is the refractive index of the fifth lens.

By reasonably configuring the refractive indexes of the fourth lens and the fifth lens, the probability of generating ghost images between the bonding surfaces of the fifth lens and the sixth lens can be reduced, and the imaging quality of the optical lens can be improved.

In a second aspect, the present invention discloses an image capturing module, where the image capturing module includes an image sensor and the optical lens according to the first aspect, and the image sensor is disposed on an image side of the optical lens. The camera module with the optical lens can realize the characteristics of large aperture and wide angle while meeting the miniaturization design so as to improve the imaging definition.

In a third aspect, the present invention discloses an electronic device, which includes a housing and an image capturing module set according to the second aspect, where the image capturing module set is disposed in the housing. The electronic equipment with the camera module can realize the characteristics of large aperture and wide angle while meeting the miniaturization design so as to improve the imaging definition.

In a fourth aspect, the present invention discloses an automobile, which includes a vehicle body and the camera module set described in the second aspect, where the camera module set is disposed on the vehicle body to obtain image information. The automobile with the camera module can be favorable for acquiring the environmental information around the automobile body, provides clear vision for driving of a driver, and provides guarantee for safe driving of the driver.

Compared with the prior art, the invention has the beneficial effects that:

according to the optical lens, the camera module, the electronic equipment and the automobile provided by the embodiment of the invention, seven lenses with refractive power are adopted in the optical lens, the first lens has negative refractive power, and the first lens can receive incident light rays with larger angles by matching with the plane design that the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface, so that the field angle range of the optical lens is enlarged, the characteristic of a large field angle is obtained, the sensitivity of the optical lens is reduced, and the imaging quality of the optical lens is improved; the second lens element with negative refractive power has a concave object-side surface and concave image-side surface, so that the transition of incident light rays with a large angle is more gentle; the positive refractive power of the third lens element and the fourth lens element can balance aberration generated by the incident light passing through the first lens element and the second lens element and further converge the incident light, so that the total optical length of the optical lens element can be shortened, further, the miniaturized design of the optical lens element is realized, and the object-side surface and the image-side surface of the third lens element are respectively concave and convex, and the object-side surface and the image-side surface of the fourth lens element are respectively convex, so that the transition of the incident light is more gradual, the relative illuminance of the optical lens element is improved, and the tolerance sensitivity of the optical lens element is reduced; the fifth lens with positive refractive power and the sixth lens with negative refractive power can mutually balance aberration generated by each other, so that tolerance sensitivity of the optical lens can be reduced, and imaging quality of the optical lens can be improved; the seventh lens element with positive refractive power has a convex object-side surface and a convex image-side surface, so as to effectively correct aberration generated by the optical lens element, reduce distortion, and concentrate an MTF (modulation transfer function) curve of the optical lens element to improve imaging definition of the optical lens element.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of an optical lens disclosed in a first embodiment of the present application;

fig. 2 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of an optical lens according to a first embodiment of the present application;

FIG. 3 is a schematic view of an optical lens according to a second embodiment of the present application;

fig. 4 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of an optical lens according to a second embodiment of the present application;

FIG. 5 is a schematic view of an optical lens according to a third embodiment of the present application;

fig. 6 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of an optical lens according to a third embodiment of the present application;

fig. 7 is a schematic structural view of an optical lens disclosed in a fourth embodiment of the present application;

Fig. 8 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of an optical lens according to a fourth embodiment of the present application;

fig. 9 is a schematic structural view of an optical lens disclosed in a fifth embodiment of the present application;

fig. 10 is a light ray spherical aberration diagram (mm), astigmatism diagram (mm) and distortion diagram (%) of an optical lens according to a fifth embodiment of the present application;

FIG. 11 is a schematic view of a camera module according to the present disclosure;

FIG. 12 is a schematic diagram of the structure of an electronic device of the present disclosure;

fig. 13 is a schematic view of the structure of the automobile disclosed in the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish between different devices, elements, or components (the particular species and configurations may be the same or different), and are not used to indicate or imply the relative importance and number of devices, elements, or components indicated. Unless otherwise indicated, the meaning of "a plurality" is two or more.

The technical scheme of the application will be further described with reference to the examples and the accompanying drawings.

Referring to fig. 1, according to a first aspect of the present application, an optical lens 100 is disclosed, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7, which are disposed in order from an object side to an image side along an optical axis O; wherein, the fifth lens L5 and the sixth lens L6 are glued to form a glued lens; during 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 finally is imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 with negative refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with positive refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with positive refractive power, the sixth lens element L6 with negative refractive power, and the seventh lens element L7 with positive refractive power.

Further, the object-side surface 11 of the first lens element L1 is convex at the paraxial region O, and the image-side surface 12 of the first lens element L1 is concave at the paraxial region O; the object-side surface 21 of the second lens element L2 is concave at a paraxial region O, and the image-side surface 22 of the second lens element L2 is convex at the paraxial region O; the object-side surface 31 of the third lens element L3 is concave at a paraxial region O, and the image-side surface 32 of the third lens element L3 is convex at the paraxial region O; the object-side surface 41 of the fourth lens element L4 is convex at a paraxial region O, and the image-side surface 42 of the fourth lens element L4 is convex at the paraxial region O; the object-side surface 51 of the fifth lens element L5 is convex at a paraxial region O, and the image-side surface 52 of the fifth lens element L5 is convex at the paraxial region O; the object-side surface 61 of the sixth lens element L6 is concave at the paraxial region O, and the image-side surface 62 of the sixth lens element L6 is concave at the paraxial region O; the object-side surface 71 of the seventh lens element L7 is convex at the paraxial region O, and the image-side surface 72 of the seventh lens element L7 is convex at the paraxial region O.

In view of the fact that the optical lens 100 is often applied to electronic devices such as an in-vehicle device and a vehicle recorder or applied to an automobile and is used as a camera on the body of the automobile, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 may be all glass lenses, so that the optical lens has good optical effects, and meanwhile, the temperature sensitivity of the optical lens 100 may be reduced, and meanwhile, each lens may adopt a spherical surface or an aspherical surface.

In addition, it is understood that in other embodiments, when the optical lens 100 is applied to an electronic device such as a smart phone, a smart tablet, etc., 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 may be plastic, and each lens may be spherical or aspherical.

In some embodiments, the optical lens 100 further includes a stop 102, which may be an aperture stop 102 and/or a field stop 102, which may be disposed between the third lens L3 and the fourth lens L4. The diaphragm 102 may be disposed between the image side surface 32 of the third lens L3 and the object side surface 41 of the fourth lens L4, for example. It is to be understood that, in other embodiments, the diaphragm 102 may be disposed between other lenses or between the object side of the optical lens 100 and the object side 11 of the first lens L1, and the arrangement is adjusted according to practical situations, which is not particularly limited in this embodiment.

Optionally, in order to improve imaging quality, the optical lens 100 further includes a protective glass 80, the protective glass 80 being disposed between the seventh lens L7 and the imaging surface 101 of the optical lens 100, the protective glass 80 being used to protect the optical lens 100. It is to be understood that, in other embodiments, the cover glass 80 may be disposed between other lenses, and the arrangement is adjusted according to practical situations, which is not limited in this embodiment.

In some embodiments, the optical lens 100 satisfies the following relationship:

2.5＜FOV/CRA＜4.5；

where FOV is the maximum field angle of the optical lens 100, CRA is the chief ray incidence angle of the maximum field of view of the optical lens 100.

In the shooting process, the influence of the incident angle of the incident light on the imaging quality of the optical lens 100 is large, when the incident angle of the incident light is too large, but the field angle of view of the optical lens 100 is not large enough, the optical lens 100 cannot well receive the incident light with a large angle, and the incident light with a large angle cannot be incident on the image sensor of the camera module at a proper angle, so that the imaging effect of the optical lens 100 is poor. Therefore, when the optical lens 100 satisfies the above relation, the optical lens 100 can achieve a large field angle and simultaneously emit incident light onto the image sensor of the image capturing module at a proper angle, so as to improve the photosensitivity of the image sensor and the imaging quality of the optical lens 100. When the ratio of the maximum field angle of the optical lens 100 to the chief ray incidence angle of the maximum field of view is closer to the upper limit, the imaging effect of the optical lens 100 is better, but beyond the upper limit, the optical lens 100 is too sensitive, and the design difficulty is too great.

In some embodiments, the optical lens 100 satisfies the following relationship:

10＜|nd2-nd3|*100＜16.5；

where nd2 is the refractive index of the second lens L2, and nd3 is the refractive index of the third lens L3.

By reasonably configuring the refractive indexes of the second lens element L2 and the third lens element L3, the second lens element L2 and the third lens element L3 can provide appropriate refractive power for the optical lens 100, which is helpful for correcting the aberration of the optical lens 100, thereby improving the resolving power of the optical lens 100 and improving the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.25＜|((SD S1)/(RDY S1))|*100＜0.35；

here, SD S1 is the effective half-caliber of the object side surface 11 of the first lens L1, and RDY S1 is the radius of curvature of the object side surface 11 of the first lens L1 at the optical axis O.

The effective half-caliber of the lens can influence the bending degree of the lens and the processing difficulty of the lens, and when the first lens L1 meets the relational expression, the processing and manufacturing difficulty of the first lens L1 can be reduced, and the production yield of the first lens L1 is improved; meanwhile, the above-mentioned relation can avoid the generation of ghost to improve the imaging quality of the optical lens 100. When the value is lower than the lower limit, the bending degree of the lens is too large, and the processing of the lens is affected; when the value is higher than the upper limit, the lens surface is too flat, which is liable to generate ghosting, affecting the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.15＜ImgH/TTL＜0.25；

wherein ImgH is the radius of the maximum effective imaging circle of the optical lens 100, and TTL is the distance between the object side surface 11 of the first lens L1 and the imaging surface 101 of the optical lens 100 on the optical axis O, i.e. the total length of the optical lens 100.

When the optical lens 100 satisfies the above-described relation, the overall length of the optical lens 100 can be controlled within a proper range while improving the imaging quality of the optical lens 100, thereby achieving miniaturization and high-quality imaging of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

-2＜f1/f＜-1.5；

where f1 is the focal length of the first lens L1, and f is the effective focal length of the optical lens 100.

The first lens L1 is the lens closest to the object side in the optical lens 100, and when the first lens L1 is configured as a lens with negative refractive power, the optical lens 100 can receive incident light with a large angle, and the field angle range of the optical lens 100 is enlarged, so that the optical lens 100 with a large field angle is obtained; meanwhile, sensitivity of the optical lens 100 can be reduced and miniaturization of the optical lens 100 can be achieved by defining the focal length of the first lens L1 and the effective focal length of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

-2.85＜f56/f＜-2.45；

where f56 is the combined focal length of the fifth lens L5 and the sixth lens L6, and f is the effective focal length of the optical lens 100.

The fifth lens L5 and the sixth lens L6 form a cemented lens with a negative combined focal length, so that the assembly sensitivity of the optical lens 100 can be reduced, the difficulty of the processing technology of the optical lens 100 is further reduced, and the assembly yield of the optical lens 100 is improved; and when the optical lens 100 satisfies the relation, chromatic aberration of the optical lens 100 can be effectively corrected, decentration sensitivity of the optical lens 100 can be reduced, aberration of the optical lens 100 can be balanced, and imaging quality of the optical lens 100 can be improved.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.5＜ΣCT/TTL＜0.75；

wherein Σct is the sum of the thicknesses of the first lens element L1 to the seventh lens element L7 on the optical axis O, and TTL is the distance between the object side surface 11 of the first lens element L1 and the imaging surface 101 of the optical lens 100 on the optical axis O, i.e. the total length of the optical lens 100.

When the optical lens 100 satisfies the above relation, the positions and the center thicknesses of the lenses of the optical lens 100 can be reasonably configured, so as to ensure compact structure among the lenses, thereby shortening the total length of the optical lens 100 and realizing the miniaturization design requirement of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

1.4≤f/EPD≤1.5；

where f is the effective focal length of the optical lens 100 and EPD is the entrance pupil diameter of the optical lens 100.

The above-mentioned relation is defined, so that the effective focal length and the entrance pupil diameter of the optical lens 100 can be reasonably configured, the overall length of the optical lens 100 can be relatively short while the characteristic that the optical lens 100 has a large aperture is realized, the characteristics of wide angle and miniaturization of the optical lens 100 are realized, and further the imaging quality of the optical lens 100 and the shooting effect under the wide angle condition can be improved. When the value is higher than the upper limit, it is unfavorable for the optical lens 100 to obtain a sufficient amount of light in a darker environment, thereby resulting in insufficient brightness of the imaging surface 101 of the optical lens 100 and affecting the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.5＜R13/f7≤1；

wherein R13 is a radius of curvature of the object side surface 71 of the seventh lens L7 at the optical axis O, and f7 is a focal length of the seventh lens L7.

Since the seventh lens element L7 has positive refractive power, when the positive refractive power of the seventh lens element L7 is too large, the angle of deflection of the incident light beam in the optical lens element 100 is too large, which affects the imaging quality of the optical lens element 100, and the excessive positive refractive power also affects the correction of the aberration of the optical lens element 100, which further affects the imaging quality of the optical lens element 100. By defining the above relation, the refractive power of the seventh lens element L7 can be reasonably configured, so that the seventh lens element L7 provides a reasonable positive refractive power for the optical lens 100, and the situation that the deflection angle of the incident light in the optical lens 100 is too large can be avoided, thereby reducing the sensitivity of the optical lens 100 and improving the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship:

9＜|nd4-nd5|*100＜11；

where nd4 is the refractive index of the fourth lens L4, and nd5 is the refractive index of the fifth lens L5.

By reasonably configuring the refractive indexes of the fourth lens L4 and the fifth lens L5, the probability of generating ghosts between the bonding surfaces of the fifth lens L5 and the sixth lens L6 can be reduced, and the imaging quality of the optical lens 100 can be improved.

The optical lens 100 of the present embodiment will be described in detail below with reference to specific parameters.

First embodiment

As shown in fig. 1, a schematic structural diagram of an optical lens 100 according to a first embodiment of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a cover glass 80 sequentially disposed from an object side to an image side along an optical axis O. The refractive powers, the surface shape and the materials of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, the sixth lens element L6 and the seventh lens element L7 can be described in the above embodiments, and are not repeated here.

Specifically, taking the effective focal length f=4.05 mm of the optical lens 100, the aperture value fno=1.48 of the optical lens 100, and the field angle fov=139.6 deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in table 1 below. The elements from the object side to the image side are sequentially arranged in the order of the elements from top to bottom in table 1 along the optical axis O of the optical lens 100. In the same lens element, the surface with smaller surface number is the object side surface of the lens element, and the surface with larger surface number is the image side surface of the lens element, i.e., the surface numbers 1 and 2 correspond to the object side surface and the image side surface of the first lens element L1, respectively. The radius Y in table 1 is the radius of curvature of the object side or image side of the corresponding plane number at the optical axis. The first value in the "thickness" parameter row of the lens is the thickness of the lens on the optical axis, and the second value is the distance from the image side surface of the lens to the latter surface on the optical axis. The value of the diaphragm in the parameter array of the thickness is the distance between the diaphragm and the vertex of the latter surface (the vertex refers to the intersection point of the surface and the optical axis) on the optical axis, the direction from the object side surface of the first lens to the image side surface of the last lens is defaulting to the positive direction of the optical axis, when the value is negative, the diaphragm is arranged on the image side of the vertex of the latter surface, and when the thickness of the diaphragm is positive, the diaphragm is arranged on the object side of the vertex of the latter surface. It is understood that the units of Y radius, thickness, and focal length in Table 1 are all mm. And the refractive index, abbe number in Table 1 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 546 nm.

In the first embodiment, the first lens L1, the third lens L3, the fifth lens L5 and the sixth lens L6 are spherical lenses, and the object-side surface and the image-side surface of the second lens L2, the fourth lens L4 and the seventh lens L7 are aspheric, and the surface profile x of each aspheric lens can be defined by, but not limited to, the following aspheric formula:

wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis O direction; c is the curvature of the aspherical surface at the optical axis, c=1/Y (i.e., paraxial curvature c is the inverse of the radius of curvature Y in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the first embodiment are given in Table 2 below.

TABLE 1

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows the optical spherical aberration diagram of the optical lens 100 in the first embodiment at 656nm, 588nm, 546nm, 486nm, and 436 nm. In fig. 2 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the optical lens 100 in the first embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 2 (B), fig. 2 (B) is a light astigmatism diagram of the optical lens 100 at a wavelength of 546nm in the first embodiment. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. The astigmatic curves represent the meridional imaging plane curvature T and the sagittal imaging plane curvature S, and it can be seen from fig. 2 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 2 (C), fig. 2 (C) is a distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 2 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Second embodiment

As shown in fig. 3, a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a cover glass 80 sequentially disposed from an object side to an image side along an optical axis O. The refractive powers, the surface shape and the materials of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, the sixth lens element L6 and the seventh lens element L7 can be described in the above embodiments, and are not repeated here.

Specifically, taking the effective focal length f=4.05 mm of the optical lens 100, the aperture value fno=1.48 of the optical lens 100, and the field angle fov=139.6 deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 3 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in Table 3 are all mm. And the refractive index, abbe number in table 3 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 546 nm.

In the second embodiment, the first lens element L1, the third lens element L3, the fifth lens element L5 and the sixth lens element L6 are spherical lens elements, and the object-side surface and the image-side surface of the second lens element L2, the fourth lens element L4 and the seventh lens element L7 are aspheric, and the method for calculating the surface profile x of each aspheric lens element can be obtained by the foregoing description of the embodiments, which is not repeated herein. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the second embodiment are given in Table 4 below.

TABLE 3 Table 3

TABLE 4 Table 4

Referring to fig. 4 (a), fig. 4 (a) shows the optical spherical aberration diagram of the optical lens 100 in the second embodiment at 656nm, 588nm, 546nm, 486nm, and 436 nm. In fig. 4 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 4 (a), the optical lens 100 in the second embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 4 (B), fig. 4 (B) is a light astigmatism diagram of the optical lens 100 at a wavelength of 546nm in the second embodiment. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. The astigmatic curves represent the meridional imaging plane curvature T and the sagittal imaging plane curvature S, and it can be seen from fig. 4 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 4 (C), fig. 4 (C) is a graph of distortion of the optical lens 100 at a wavelength of 546nm in the second embodiment. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 4 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Third embodiment

As shown in fig. 5, a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a cover glass 80 sequentially disposed from an object side to an image side along an optical axis O. The refractive powers, the surface shape and the materials of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, the sixth lens element L6 and the seventh lens element L7 can be described in the above embodiments, and are not repeated here.

Specifically, taking the effective focal length f=4.07 mm of the optical lens 100, the aperture value fno=1.48 of the optical lens 100, and the field angle fov=139.6 deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in table 5 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in Table 5 are all mm. And the refractive index, abbe number in Table 5 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 546 nm.

In the third embodiment, the first lens element L1, the third lens element L3, the fifth lens element L5 and the sixth lens element L6 are spherical lens elements, and the object-side surface and the image-side surface of the second lens element L2, the fourth lens element L4 and the seventh lens element L7 are aspheric, and the method for calculating the surface profile x of each aspheric lens element can be obtained by the foregoing description of the embodiments, which is not repeated herein. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the third embodiment are given in Table 6 below.

TABLE 5

TABLE 6

Referring to fig. 6 (a), fig. 6 (a) shows a graph of optical spherical aberration of the optical lens 100 in the third embodiment at 656nm, 588nm, 546nm, 486nm, and 436 nm. In fig. 6 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 6 (a), the optical lens 100 in the third embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 6 (B), fig. 6 (B) is a light astigmatism diagram of the optical lens 100 at a wavelength of 546nm in the third embodiment. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. The astigmatic curves represent the meridional imaging plane curvature T and the sagittal imaging plane curvature S, and it can be seen from fig. 6 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 6 (C), fig. 6 (C) is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 546 nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 6 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Fourth embodiment

As shown in fig. 7, a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a cover glass 80 sequentially disposed from an object side to an image side along an optical axis O. The refractive powers, the surface shape and the materials of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, the sixth lens element L6 and the seventh lens element L7 can be described in the above embodiments, and are not repeated here.

Specifically, taking the effective focal length f=4.07 mm of the optical lens 100, the aperture value fno=1.48 of the optical lens 100, and the field angle fov=139.6 deg of the optical lens 100 as examples, other parameters of the optical lens 100 are given in table 7 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in Table 7 are all mm. And the refractive index, abbe number in Table 7 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 546 nm.

In the fourth embodiment, the first lens element L1, the third lens element L3, the fifth lens element L5 and the sixth lens element L6 are spherical lens elements, and the object-side surface and the image-side surface of the second lens element L2, the fourth lens element L4 and the seventh lens element L7 are aspheric, and the method for calculating the surface profile x of each aspheric lens element is obtained by the foregoing description of the embodiments and is not repeated herein. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each of the aspherical mirrors in the fourth embodiment are given in Table 8 below.

TABLE 7

TABLE 8

Referring to fig. 8 (a), fig. 8 (a) shows a graph of optical spherical aberration at 656nm, 588nm, 546nm, 486nm, and 436nm of the optical lens 100 in the fourth embodiment. In fig. 8 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 8 (a), the optical lens 100 in the fourth embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 8 (B), fig. 8 (B) is a light astigmatism diagram of the optical lens 100 of the fourth embodiment at a wavelength of 546 nm. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. The astigmatic curves represent the meridional imaging plane curvature T and the sagittal imaging plane curvature S, and it can be seen from fig. 8 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 8 (C), fig. 8 (C) is a distortion curve diagram of the optical lens 100 of the fourth embodiment at a wavelength of 546 nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 8 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Fifth embodiment

As shown in fig. 9, a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application, the optical lens 100 includes a first lens L1, a second lens L2, a stop 102, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a cover glass 80 sequentially disposed from an object side to an image side along an optical axis O. The refractive powers, the surface shape and the materials of the first lens element L1, the second lens element L2, the third lens element L3, the fourth lens element L4, the fifth lens element L5, the sixth lens element L6 and the seventh lens element L7 can be described in the above embodiments, and are not repeated here.

Specifically, taking the effective focal length f=4.02 mm of the optical lens 100, the aperture value fno=1.46 of the optical lens 100, and the field angle fov=139.6 deg of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 9 below. And the definition of each parameter can be derived from the description of the foregoing embodiments, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in Table 9 are all mm. And the refractive index, abbe number in Table 9 were obtained at a reference wavelength of 587.6nm, and the focal length was obtained at a reference wavelength of 546 nm.

In the fifth embodiment, the first lens element L1, the third lens element L3, the fifth lens element L5 and the sixth lens element L6 are spherical lens elements, and the object-side surface and the image-side surface of the second lens element L2, the fourth lens element L4 and the seventh lens element L7 are aspheric, and the method for calculating the surface profile x of each aspheric lens element is obtained by the foregoing description of the embodiments and is not repeated herein. The following table 10 gives the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18 and a20 that can be used for each aspherical mirror in the fifth embodiment.

TABLE 9

Table 10

Referring to fig. 10 (a), fig. 10 (a) shows a graph of optical spherical aberration of the optical lens 100 in the fifth embodiment at wavelengths 656nm, 588nm, 546nm, 486nm, and 436 nm. In fig. 10 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 10 (a), the optical lens 100 in the fifth embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

Referring to fig. 10 (B), fig. 10 (B) is a light astigmatism diagram of the optical lens 100 at a wavelength of 546nm in the fifth embodiment. Wherein, the abscissa along the X-axis direction represents focus offset, and the ordinate along the Y-axis direction represents image height in mm. The astigmatic curves represent the meridional imaging plane curvature T and the sagittal imaging plane curvature S, and it can be seen from fig. 10 (B) that at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 10 (C), fig. 10 (C) is a distortion curve diagram of the optical lens 100 of the fifth embodiment at a wavelength of 546 nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 10 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Referring to table 11, table 11 is a summary of the ratios of the relationships in the first embodiment to the fifth embodiment of the present application.

TABLE 11

Relation/embodiment	First embodiment	Second embodiment	Third embodiment	Fourth embodiment	Fifth embodiment
						2.5＜FOV/CRA＜4.5	3.72	3.73	3.65	3.57	3.52
10＜\|nd2-nd3\|*100＜16.5	15.80	15.80	14.90	14.50	11.80
						0.25＜\|((SD S1)/(RDY S1))\|*100＜0.35	0.31	0.31	0.31	0.31	0.29
0.15＜ImgH/TTL＜0.25	0.18	0.18	0.18	0.18	0.17
						-2＜f1/f＜-1.5	-1.82	-1.82	-1.81	-1.79	-1.78
-2.85＜f56/f＜-2.45	-2.57	-2.57	-2.57	-2.56	-2.76
						0.5＜ΣCT/TTL＜0.75	0.61	0.61	0.61	0.61	0.64
1.4≤f/EPD≤1.5	1.48	1.48	1.48	1.48	1.46
						0.5＜R13/f7≤1	0.72	0.72	0.73	0.73	0.75
9＜\|nd4-nd5\|*100＜11	10.5	10.5	10.5	10.4	9.70

Referring to fig. 11, the present application further discloses an image capturing module 200, which includes an image sensor 201 and the optical lens 100 according to any one of the first to fifth embodiments, wherein the image sensor 201 is disposed on an image side of the optical lens 100. The optical lens 100 is configured to receive an optical signal of a subject and project the optical signal to the image sensor 201, and the image sensor 201 is configured to convert the optical signal corresponding to the subject into an image signal, which is not described herein. It can be appreciated that the image capturing module 200 having the optical lens 100 described above can achieve the characteristics of a large aperture and a wide angle and can improve the imaging definition while satisfying the miniaturization design. Since the above technical effects are described in detail in the embodiment of the optical lens 100, the description thereof is omitted here.

Referring to fig. 12, the application further discloses an electronic device 300, where the electronic device 300 includes a housing and the camera module 200, and the camera module 200 is disposed on the housing. The electronic device 300 may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a smart watch, a monitor, a vehicle recorder, a back image, etc. It can be appreciated that the electronic device 300 having the image capturing module 200 also has all the technical effects of the optical lens 100. That is, the characteristics of a large aperture and a wide angle can be realized and the imaging definition can be improved while the miniaturization design is satisfied. Since the above technical effects are described in detail in the embodiment of the optical lens 100, the description thereof is omitted here.

Referring to fig. 13, the application further discloses an automobile 400, the automobile 400 includes a vehicle body 401 and the camera module 200, and the camera module 200 is disposed on the vehicle body 401 to obtain image information. It can be appreciated that the automobile 400 having the image capturing module 200 also has all the technical effects of the optical lens 100. The automobile with the camera module can be favorable for acquiring environmental information around the automobile body, can adapt to the light and shade change of the external environment, effectively distinguishes the details of the road environment, meets the special requirements of an intelligent driving system, provides clear vision for driving of a driver, and provides guarantee for safe driving of the driver. Since the above technical effects are described in detail in the embodiment of the optical lens 100, the description thereof is omitted here.

The optical lens, the camera module, the electronic device and the automobile disclosed by the embodiment of the invention are described in detail, and specific examples are applied to explain the principle and the implementation mode of the invention, and the description of the above embodiments is only used for helping to understand the optical lens, the camera module, the electronic device and the automobile and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims

1. An optical lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are arranged in this order from an object side to an image side along an optical axis;

the seventh lens element with positive refractive power has a convex object-side surface at a paraxial region and a convex image-side surface at a paraxial region;

the optical lens satisfies the following relation: -2 < f1/f < -1.5, wherein f1 is the focal length of the first lens and f is the effective focal length of the optical lens;

the fifth lens and the sixth lens are cemented lenses.

2. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

2.5＜FOV/CRA＜4.5；

3. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

10＜|nd2-nd3|*100＜16.5；

4. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

0.25＜|（(SD S1)/(RDY S1)）|*100＜0.35 ；

5. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

0.15＜ImgH/TTL＜0.25；

wherein ImgH is the radius of the maximum effective imaging circle of the optical lens, and TTL is the distance between the object side surface of the first lens and the imaging surface of the optical lens on the optical axis.

6. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

2.85 < f56/f < -2.45; wherein f is an effective focal length of the optical lens, and f56 is a combined focal length of the fifth lens and the sixth lens.

7. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

sigma CT/TTL is more than 0.5 and less than 0.75, or f/EPD is more than or equal to 1.4 and less than or equal to 1.5;

wherein Σct is the sum of the thicknesses of the first lens element to the seventh lens element on the optical axis, TTL is the distance from the object side surface of the first lens element to the imaging surface of the optical lens element on the optical axis, f is the effective focal length of the optical lens element, and EPD is the entrance pupil diameter of the optical lens element.

8. An imaging module comprising an image sensor and the optical lens of any one of claims 1-7, wherein the image sensor is disposed on an image side of the optical lens.

9. An electronic device, comprising a housing and the camera module of claim 8, wherein the camera module is disposed on the housing.

10. An automobile, comprising a body and the camera module of claim 8, wherein the camera module is disposed on the body to obtain image information.