CN116149023A

CN116149023A - Optical lens, camera module and electronic equipment

Info

Publication number: CN116149023A
Application number: CN202310406341.8A
Authority: CN
Inventors: 冯科; 韦瑶
Original assignee: Jiangxi Oufei Optics Co ltd
Current assignee: Jiangxi Oufei Optics Co ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2023-05-23
Anticipated expiration: 2043-04-17
Also published as: CN116149023B

Abstract

The invention discloses an optical lens, an image pickup module and electronic equipment, wherein the optical lens has six lenses with refractive power, and the lens sequentially comprises the following components 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 at a paraxial region thereof; a second lens element with negative refractive power having a concave object-side surface at a paraxial region; the object side surface and the image side surface of the third lens element with positive refractive power are convex at a paraxial region; a fourth lens element with negative refractive power having a concave image-side surface at a paraxial region; the object side surface and the image side surface of the fifth lens element with positive refractive power are convex at a paraxial region; a sixth lens element with positive refractive power; the optical lens satisfies the relation: 55deg < (FOV f)/IMGH < 60deg. The optical lens, the camera module and the electronic equipment can improve the imaging quality and have the characteristic of large field angle.

Description

Optical lens, camera module and electronic equipment

Technical Field

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

Background

The vehicle-mounted lens is applied to an automobile auxiliary driving system, has the functions of accurately capturing road surface information in real time, can reduce traffic accidents, improves the running safety of an automobile, and is widely applied, however, most of the current vehicle-mounted lenses are smaller in view angle and limited in information capture, meanwhile, along with the development and progress of the optical lenses, the imaging quality requirements of people on the vehicle-mounted lenses are higher and higher, and the vehicle-mounted lenses with high imaging quality are favorable for capturing clear monitoring pictures and recording detailed information. Therefore, how to reasonably configure the refractive power and the surface shape of the optical lens, so that the optical lens applied to the vehicle-mounted electronic device has the characteristic of large field angle while improving the imaging quality, becomes a problem to be solved.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, an imaging module and electronic equipment, which can improve imaging quality and have the characteristic of large field angle.

In order to achieve the above object, in a first aspect, the present invention discloses an optical lens assembly comprising six lens elements with refractive power, in order from an object side to an image side along an optical axis:

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

a second lens element with negative refractive power having a concave object-side surface at a paraxial region;

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

a fourth lens element with negative refractive power having a concave image-side surface at a paraxial region;

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

a sixth lens element with positive refractive power;

the optical lens satisfies the following relation:

55deg＜(FOV*f)/IMGH＜60deg；

Wherein FOV is the maximum field angle of the optical lens, IMGH is the diameter of the maximum effective imaging circle of the optical lens (i.e. the image height of the optical lens), and f is the focal length of the optical lens.

The first lens of the optical lens is provided with negative refractive power, and the object side surface and the image side surface of the first lens are respectively a convex surface and a concave surface at a paraxial region, so that the focal length of the optical lens is shortened, the incident light rays with a large angle can enter the optical lens, the field angle range of the optical lens is enlarged, and the characteristic of a large field angle is obtained; the second lens has negative refractive power, so that incident light rays passing through the first lens can enter the optical lens more gradually, and the object side surface of the second lens is combined with a concave surface at a paraxial region, so that off-axis aberration is corrected, the sensitivity of the optical lens to change the resolution of the optical lens is reduced, the stability of the imaging effect of the optical lens is enhanced, and the imaging quality of the optical lens is improved; when light enters the third lens with positive refractive power, due to the design that the object side surface and the image side surface of the third lens are convex at a paraxial region, the light collected by the first lens and the second lens can be compressed, so that the incident light is smoothly transited, the relative illumination of the optical lens is improved, the light rays in the central field and the edge field are effectively converged, the edge aberration is corrected, the resolution of the optical lens is improved, and the imaging quality of the optical lens is further improved; the fourth lens with negative refractive power is matched, so that aberration generated by light passing through the first lens, the second lens and the third lens can be balanced, and the chromatic aberration is corrected, so that the imaging quality of the optical lens is improved, and meanwhile, the image side surface of the fourth lens is concave at a paraxial region, so that the field curvature of the optical lens is corrected, and the imaging quality of the optical lens is improved; the fifth lens element with positive refractive power can balance the aberration of light beam, which is difficult to correct, generated by the fourth lens element, and promote the aberration balance of the optical lens element, and by combining the arrangement that the object side surface and the image side surface of the fifth lens element are both convex at the paraxial region, the transition of incident light beam is more gentle, the relative illuminance of the optical lens element is improved, and meanwhile, the aberration generated by the optical lens element is effectively corrected, the distortion is reduced, so that the imaging definition of the optical lens element is improved, and the imaging quality of the optical lens element is improved; the sixth lens has positive refractive power, can effectively correct astigmatism of the optical lens, improves imaging quality of the optical lens, and is beneficial to miniaturization design of the optical lens.

In addition, the optical lens satisfies 55deg < (FOV f)/IMGH < 60deg, and by reasonably configuring the maximum field angle, image height and focal length of the optical lens, the optical lens can obtain a larger field angle, so that the optical lens can absorb more information, and meanwhile, the deflection angle of emergent light is reduced, so that the generation of dark angle is reduced, the distortion of the optical lens is restrained, the imaging quality of the optical lens is improved, and the detail of a shot object is better captured.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: SD11/SAG11 is more than 5.5 and less than 7.5;

wherein SD11 is the maximum effective half-caliber of the object side surface of the first lens, SAG11 is the distance from the intersection point of the object side surface of the first lens and the optical axis to the maximum effective half-caliber of the object side surface of the first lens in the direction parallel to the optical axis (i.e. the sagittal height at the maximum effective half-caliber of the object side surface of the first lens).

The bending degree of the object side surface of the first lens can be controlled by restraining the sagittal ratio of the maximum effective half caliber of the object side surface of the first lens to the maximum effective half caliber of the object side surface, so that the excessive bending of the object side surface of the first lens is avoided, the processing difficulty of the first lens is reduced, the caliber of the object side surface of the first lens is favorably controlled, the caliber of the head of the optical lens is limited, the volume of the optical lens is reduced, and the miniaturized design is favorably realized. When the ratio is lower than the lower limit, the sagittal height of the object side surface of the first lens is too large at the maximum effective half caliber, and the first lens is too bent, so that the processing difficulty of the first lens is increased; when the ratio is higher than the upper limit, the maximum effective half caliber of the object side surface of the first lens is too large, which is not beneficial to controlling the head caliber of the optical lens and is not beneficial to the miniaturization design of the optical lens.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.7 < SD62/CT6 < 2.2;

wherein SD62 is the maximum effective half-caliber of the image side surface of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis (i.e. the center thickness of the sixth lens).

Considering that the sixth lens is a lens closest to the image side of the optical lens, the maximum effective half-caliber of the sixth lens can be effectively controlled by restricting the ratio of the maximum effective half-caliber of the object side surface of the sixth lens to the center thickness of the sixth lens, so that the size of the tail caliber of the optical lens is restricted, the volume of the optical lens is favorably compressed, and the miniaturization design of the optical lens is favorably realized. When the ratio is lower than the lower limit, the center thickness of the sixth lens is too large, which is not beneficial to the structural layout of the optical lens, and the structural compactness of the optical lens cannot be ensured; when the ratio is higher than the upper limit, the maximum effective half caliber of the object side surface of the sixth lens is too large, which is not beneficial to the miniaturization design of the optical lens.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.6 < |f12/f| < 1.8;

Wherein f12 is a combined focal length of the first lens and the second lens, and f is a focal length of the optical lens.

By restricting the ratio of the combined focal length of the first lens and the second lens to the focal length of the optical lens, the refractive power of the front lens group (the combination of the first lens and the second lens) can be reasonably distributed, which is favorable for converging the incident light of the front lens group and the incidence of the wide-angle view field light, so that the optical lens obtains the wide-angle characteristic. When the ratio is lower than the lower limit, the refractive power of the first lens and the second lens is overlarge, so that larger astigmatism and chromatic aberration are easy to generate, the resolving power of the optical lens is reduced, and the imaging quality of the optical lens is influenced; when the ratio is higher than the upper limit, the refractive powers of the first lens element and the second lens element are insufficient, so that the incident light rays with large angles are difficult to enter the optical lens element, and the range of the angle of view of the optical lens element is not enlarged.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes a diaphragm, and the diaphragm may be located between the third lens and the fourth lens, based on which the optical lens satisfies the following relation: f123/f456 is less than 1.2 and less than 3.5;

wherein f123 is a combined focal length of the first lens, the second lens and the third lens (i.e., a focal length of the front lens group), and f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens (i.e., a focal length of the rear lens group).

By restricting the ratio of the focal length of the front lens group to the focal length of the rear lens group, the refractive power of the optical lens can be reasonably distributed, thereby being beneficial to promoting the aberration balance of the optical lens and improving the imaging quality of the optical lens.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: f45/f is less than 9.8 and 5.5;

wherein f45 is a combined focal length of the fourth lens and the fifth lens, and f is a focal length of the optical lens.

By restricting the ratio of the combined focal length of the fourth lens element and the fifth lens element to the focal length of the optical lens element, the refractive powers of the fourth lens element and the fifth lens element can be reasonably distributed, and meanwhile, as can be seen from the above description, the fourth lens element has negative refractive power, and the fifth lens element has positive refractive power, which is beneficial to correcting the aberration of the optical lens element, thereby facilitating the aberration balance of the optical lens element. When the ratio is lower than the lower limit, the whole refractive power of the fourth lens and the fifth lens is overlarge, so that the light rays passing through the fourth lens and the fifth lens are easy to generate serious astigmatism, and the imaging quality of the optical lens is not easy to be improved; when the ratio is higher than the upper limit, the overall refractive power of the fourth lens element and the fifth lens element is too small, which is prone to generate larger edge aberration and chromatic aberration, resulting in degradation of resolution performance of the optical lens.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the fourth lens is glued with the fifth lens, and the optical lens satisfies the following relation: f45/|CT4-CT5| < 32;

wherein f45 is a combined focal length of the fourth lens and the fifth lens, CT4 is a thickness of the fourth lens on the optical axis (i.e., a center thickness of the fourth lens), and CT5 is a thickness of the fifth lens on the optical axis (i.e., a center thickness of the fifth lens).

The combined focal length of the fourth lens and the fifth lens, the center thickness of the fourth lens and the center thickness of the fifth lens are reasonably configured, so that the ratio of the combined focal length of the fourth lens and the fifth lens to the difference of the center thicknesses of the fourth lens and the fifth lens is in a reasonable range, the refractive power of the fourth lens and the fifth lens is reasonably distributed, the aberration of the optical lens is favorably corrected, meanwhile, the bonding quality of the fourth lens and the fifth lens can be favorably improved by restraining the difference of the center thicknesses of the fourth lens and the fifth lens, the situation that the bonding process is not favorably implemented due to the fact that the difference of the center thicknesses of the fourth lens and the fifth lens is too large is avoided, and the situation that when the temperature environment is greatly changed, the difference of cold and hot deformation is large due to the fact that the difference of the center thicknesses of the fourth lens and the fifth lens is large is caused, and the probability of occurrence of phenomena such as glue crack or degumping is increased is avoided.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 14 < TTL/AT23 < 212;

wherein 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), and AT23 is the distance between the image side surface of the second lens element and the object side surface of the third lens element on the optical axis (i.e., the air gap between the second lens element and the third lens element).

The ratio of the total length of the optical lens to the air gap between the second lens and the third lens is restrained, so that the total length of the optical lens can be controlled, the structural compactness of the optical lens is improved, the miniaturization of the optical lens is facilitated, the air gap between the second lens and the third lens can be reduced, the tolerance sensitivity of the second lens and the third lens is reduced, the risk of field curvature is reduced, and the imaging quality of the optical lens is improved. When the ratio is lower than the lower limit, the air gap between the second lens and the third lens is increased, so that the field curvature is increased, the focus offset condition of each view field is aggravated, and the imaging quality of the optical lens is reduced; when the ratio is higher than the upper limit, the total length of the optical lens is excessively large, which is unfavorable for miniaturization of the optical lens.

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 has the characteristics of large field angle while improving imaging quality.

In a third aspect, the invention discloses an electronic device, which comprises a housing and the camera module set in the second aspect, wherein the camera module set is arranged on the housing. The electronic equipment with the camera module has the characteristics of large field angle while improving imaging quality.

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

according to the optical lens, the camera module and the electronic equipment, the first lens of the optical lens is provided with the negative refractive power, and the object side surface and the image side surface of the first lens are respectively the convex surface and the concave surface at the paraxial region, so that the focal length of the optical lens is shortened, the incident light rays with a large angle can enter the optical lens, the field angle range of the optical lens is enlarged, and the characteristic of a large field angle is obtained; the second lens has negative refractive power, so that incident light rays passing through the first lens can enter the optical lens more gradually, and the object side surface of the second lens is combined with a concave surface at a paraxial region, so that off-axis aberration is corrected, the sensitivity of the optical lens to change the resolution of the optical lens is reduced, the stability of the imaging effect of the optical lens is enhanced, and the imaging quality of the optical lens is improved; when light enters the third lens with positive refractive power, due to the design that the object side surface and the image side surface of the third lens are convex at a paraxial region, the light collected by the first lens and the second lens can be compressed, so that the incident light is smoothly transited, the relative illumination of the optical lens is improved, the light rays in the central field and the edge field are effectively converged, the edge aberration is corrected, the resolution of the optical lens is improved, and the imaging quality of the optical lens is further improved; the fourth lens with negative refractive power is matched, so that aberration generated by light passing through the first lens, the second lens and the third lens can be balanced, and the chromatic aberration is corrected, so that the imaging quality of the optical lens is improved, and meanwhile, the image side surface of the fourth lens is concave at a paraxial region, so that the field curvature of the optical lens is corrected, and the imaging quality of the optical lens is improved; the fifth lens element with positive refractive power can balance the aberration of light beam, which is difficult to correct, generated by the fourth lens element, and promote the aberration balance of the optical lens element, and by combining the arrangement that the object side surface and the image side surface of the fifth lens element are both convex at the paraxial region, the transition of incident light beam is more gentle, the relative illuminance of the optical lens element is improved, and meanwhile, the aberration generated by the optical lens element is effectively corrected, the distortion is reduced, so that the imaging definition of the optical lens element is improved, and the imaging quality of the optical lens element is improved; the sixth lens has positive refractive power, can effectively correct astigmatism of the optical lens, improves imaging quality of the optical lens, and is beneficial to miniaturization design of the optical lens.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 invention, 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 longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram of an optical lens disclosed in the first embodiment of the present application;

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

FIG. 4 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram of an optical lens disclosed in a second embodiment of the present application;

fig. 5 is a schematic structural view of an optical lens disclosed in a third embodiment of the present application;

FIG. 6 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram of an optical lens disclosed in 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 longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram of an optical lens disclosed in 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 longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram of an optical lens disclosed in a fifth embodiment of the present application;

FIG. 11 is a schematic view of the structure of the camera module disclosed in the present application;

fig. 12 is a schematic structural view of an electronic device disclosed in the present application.

Detailed Description

The technical scheme of the invention 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, wherein the optical lens 100 has six lens elements with refractive power, and a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5 and a sixth lens element L6 are disposed in order from an object side to an image side along an optical axis direction. In imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 in order from the object side of the first lens L1, and finally is imaged on the imaging surface 101 of the optical lens 100.

Further, 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 negative refractive power, the fifth lens element L5 with positive refractive power, and the sixth lens element L6 with positive refractive power.

Further, the object-side surface 11 of the first lens element is convex at the paraxial region O, and the image-side surface 12 of the first lens element is concave at the paraxial region O; the object-side surface 21 of the second lens element is concave at a paraxial region O, and the image-side surface 22 of the second lens element is concave or convex at the paraxial region O; the object side surface 31 of the third lens element is convex at a paraxial region O, and the image side surface 32 of the third lens element is convex at the paraxial region O; the object-side surface 41 of the fourth lens element is concave or convex at a paraxial region O, and the image-side surface 42 of the fourth lens element is concave at the paraxial region O; the object-side surface 51 of the fifth lens element is convex at a paraxial region O, and the image-side surface 52 of the fifth lens element is convex at the paraxial region O; the object-side surface 61 of the sixth lens element is concave or convex at the paraxial region O, and the image-side surface 62 of the sixth lens element is concave or convex at the paraxial region O.

By reasonably configuring the surface shape and refractive power of each lens between the first lens L1 to the sixth lens L6, the optical lens 100 can have the characteristic of a large angle of view while improving imaging quality.

Further, in some embodiments, the materials of the first lens element L1, the third lens element L3, the fourth lens element L4 and the fifth lens element L5 are all glass, the materials of the second lens element L2 and the sixth lens element L6 are plastic, and the optical lens 100 has low temperature drift sensitivity and is light in overall weight through the combination of the lenses of different materials.

In other embodiments, the materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be plastic, so as to reduce the weight and cost of the optical lens 100. Alternatively, the materials of the lenses may be glass, so that the optical lens 100 has a good optical effect, and the temperature drift sensitivity of the optical lens 100 is reduced.

It should be understood that the materials of the lenses of the optical lens 100 may be specifically selected according to practical needs, for example, all the lenses are made of plastic, all the lenses are made of glass, or the lenses made of different materials are mixed for use, which is not specifically limited herein.

In some embodiments, the spherical lens has the characteristics of simple manufacturing process and low production cost, and can facilitate flexible design of the surface shape of the lens, so that the imaging resolution capability of the optical lens is improved. The aspheric lens can enable the object side surface or the image side surface of the lens to have more flexible design, so that the phenomena of unclear imaging, distortion of vision, narrow visual field and the like can be well solved under the condition of smaller size and thinner lens, and the optical lens can have good imaging quality without arranging too many lenses, thereby being beneficial to shortening the length of the optical lens. In this way, the first lens L1, the third lens L3, the fourth lens L4, and the fifth lens L5 may be spherical lenses, and the second lens L2 and the sixth lens L6 may be aspheric lenses, so that the combination of spherical and aspheric designs not only can improve the workability of each lens, facilitate the planar design, but also can make the object side or the image side of the lens have a more flexible design, so that the adverse phenomena such as poor imaging, distortion of view, and narrow field of view can be well solved under the condition of smaller and thinner size of each lens, and the optical lens 100 can have good imaging quality without providing too many lenses, thereby being beneficial to shortening the length of the optical lens 100.

It is understood that in other embodiments, the surfaces of the lenses in the optical system 100 may be spherical, aspherical, or any combination of spherical and aspherical, and may be specifically selected according to practical needs, so the present embodiment is not specifically limited.

In some embodiments, the optical lens 100 further includes a stop STO, which may be an aperture stop and/or a field stop, for example, the stop STO may be an aperture stop, or the stop STO may be a field stop, or the stop STO may be an aperture stop and a field stop. By disposing the stop STO between the image side surface 32 of the third lens and the object side surface 41 of the fourth lens, the exit pupil can be moved away from the imaging surface 101, and the effective diameter of the optical lens 100 can be reduced without reducing the telecentricity of the optical lens 100, thereby achieving miniaturization.

It will be appreciated that in other embodiments, the stop STO may be disposed between other lenses, and the arrangement is adjusted according to the actual situation, which is not particularly limited in this embodiment.

In some embodiments, the optical lens 100 further includes an infrared filter 70, and the infrared filter 70 is disposed between the sixth lens L6 and the imaging surface 101 of the optical lens 100. Alternatively, the infrared filter 70 may be an infrared band-pass filter to pass infrared light and reflect visible light to implement infrared imaging of the optical lens 100, so that the optical lens 100 can image in a dark environment or a special application scene and obtain better imaging quality.

In other embodiments, the infrared filter 70 may also be an infrared cut filter to filter infrared light, so that the imaging is more suitable for the visual experience of human eyes through visible light, thereby improving the imaging quality.

It is to be understood that the infrared filter 70 may be made of plastic, or may be made of optical glass coating, or the infrared filter 70 made of other materials may be selected according to actual needs, and is not particularly limited in this embodiment.

In some embodiments, the optical lens 100 further includes a protective glass 80, where the protective glass 80 is disposed between the infrared filter 70 and the imaging surface 101 of the optical lens 100, so as to protect and prevent dust of the image sensor.

It is understood that the cover glass 80 may be part of the optical lens 100 or may be removed from the optical lens 100, but the optical overall length of the optical lens 100 remains unchanged when the cover glass 80 is removed.

It is to be understood that the protective glass 80 may be made of plastic, or may be made of an optical glass coating, or the protective glass 80 made of other materials may be selected according to actual needs, and is not particularly limited in this embodiment.

In some embodiments, the optical lens 100 satisfies the relationship: 55deg < (FOV f)/IMGH < 60deg, e.g. (FOV f)/imgh= 55.276deg, 55.427deg, 56.384deg, 56.969deg, 56.655deg, 57.192deg, 57.296deg, 57.354deg, 58.952deg, 59.162deg, etc. Where FOV is the maximum field angle of the optical lens 100, IMGH is the diameter of the maximum effective imaging circle of the optical lens 100 (i.e., the image height of the optical lens 100), and f is the focal length of the optical lens 100.

By reasonably configuring the maximum angle of view, image height and focal length of the optical lens 100, it is possible to facilitate the optical lens 100 to obtain a larger angle of view, so that the optical lens 100 can capture more information, and simultaneously reduce the deflection angle of the outgoing light, so as to reduce the generation of a dark angle and suppress the distortion of the optical lens 100, thereby improving the imaging quality of the optical lens 100 and facilitating better capturing of details of the photographed object.

In some embodiments, the optical lens 100 satisfies the relationship: 5.5 < SD11/SAG11 < 7.5, e.g., SD11/SAG11 = 5.628, 5.835, 6.017, 6.221, 6.415, 6.813, 6.955, 7.139, 7.244, 7.483, etc. Wherein SD11 is the maximum effective half-caliber of the object side surface 11 of the first lens, SAG11 is the distance from the intersection point of the object side surface 11 of the first lens and the optical axis O to the maximum effective half-caliber of the object side surface 11 of the first lens in the direction parallel to the optical axis O (i.e. the sagittal height of the maximum effective half-caliber of the object side surface 11 of the first lens).

The bending degree of the object side surface 11 of the first lens can be controlled by restraining the sagittal ratio of the maximum effective half caliber of the object side surface 11 of the first lens to the maximum effective half caliber of the object side surface, so that the excessive bending of the object side surface 11 of the first lens is avoided, the processing difficulty of the first lens L1 is reduced, the caliber of the object side surface 11 of the first lens is favorably controlled, the caliber of the head of the optical lens 100 is limited, and the volume of the optical lens 100 is favorably compressed, so that the miniaturization design is favorably realized. When the ratio is lower than the lower limit, the sagittal height of the object side surface 11 of the first lens element at the maximum effective half-caliber is too large, and the first lens element L1 is too curved, resulting in an increase in the difficulty of processing the first lens element L1; when the ratio is higher than the upper limit, the maximum effective half-caliber of the object side surface 11 of the first lens is too large, which is not beneficial to controlling the head caliber of the optical lens 100 and is not beneficial to miniaturizing the optical lens 100.

In some embodiments, the optical lens 100 satisfies the relationship: 0.7 < SD62/CT6 < 2.2, e.g., SD62/CT6 = 0.734, 0.858, 0.901, 1.037, 1.185, 1.228, 2.004, 2.040, 2.136, 2.184, etc. Wherein SD62 is the maximum effective half-caliber of the image side surface 62 of the sixth lens element, and CT6 is the thickness of the sixth lens element L6 on the optical axis O (i.e., the center thickness of the sixth lens element L6).

Considering that the sixth lens L6 is the lens element closest to the image side of the optical lens 100, by restricting the ratio of the maximum effective half-caliber of the object side surface 61 of the sixth lens element to the center thickness of the sixth lens element L6, the maximum effective half-caliber of the sixth lens element L6 can be effectively controlled, so as to restrict the size of the tail caliber of the optical lens 100, thereby facilitating the volume compression of the optical lens 100 and the miniaturization design of the optical lens 100. When the ratio is lower than the lower limit, the center thickness of the sixth lens L6 is too large, which is not beneficial to the structural layout of the optical lens 100, and cannot ensure the structural compactness of the optical lens 100; when the ratio is higher than the upper limit, the maximum effective half-caliber of the object side surface 61 of the sixth lens element is too large, which is not beneficial to the miniaturization design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the relationship: 0.6 < |f12/f| < 1.8, for example |f12/f|=0.651, 0.792, 0.837, 0.983, 1.089, 1.053, 1.562, 1.565, 1.629, 1.745, or the like. Wherein f12 is a combined focal length of the first lens L1 and the second lens L2, and f is a focal length of the optical lens 100.

By restricting the ratio of the combined focal length of the first lens element L1 and the second lens element L2 to the focal length of the optical lens assembly 100, the refractive power of the front lens group (the combination of the first lens element L1 and the second lens element L2) can be reasonably distributed, which is advantageous for converging the incident light of the front lens group and for the incidence of the wide-angle field light, so that the optical lens assembly 100 can obtain the wide-angle characteristic. When the ratio is lower than the lower limit, the refractive powers of the first lens element L1 and the second lens element L2 are too high, so that larger astigmatism and chromatic aberration are easily generated, the resolving power of the optical lens 100 is reduced, and the imaging quality of the optical lens 100 is affected; when the ratio is higher than the upper limit, the refractive powers of the first lens element L1 and the second lens element L2 are insufficient, so that the incident light beam with a large angle is difficult to enter the optical lens 100, which is disadvantageous for expanding the angle of view of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the relationship: 1.2 < f123/f456 < 3.5, e.g., f123/f456=1.263, 1.376, 1.454, 1.475, 2.171, 2.431, 3.069, 3.267, 3.381, or 3.422, etc. Wherein f123 is a combined focal length of the first lens L1, the second lens L2, and the third lens L3 (i.e., a focal length of the front lens group), and f456 is a combined focal length of the fourth lens L4, the fifth lens L5, and the sixth lens L6 (i.e., a focal length of the rear lens group).

By restricting the ratio of the focal length of the front lens group to the focal length of the rear lens group, the refractive power of the optical lens 100 can be reasonably distributed, which is beneficial to promoting the aberration balance of the optical lens 100 and improving the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the relationship: 5.5 < f45/f < 9.8, e.g., f45/f= 5.564, 5.681, 5.754, 6.049, 6.640, 6.592, 7.355, 8.837, 9.134, 9.759, etc. Wherein f45 is a combined focal length of the fourth lens L4 and the fifth lens L5, and f is a focal length of the optical lens 100.

By restricting the ratio of the combined focal length of the fourth lens element L4 and the fifth lens element L5 to the focal length of the optical lens element 100, the refractive powers of the fourth lens element L4 and the fifth lens element L5 can be reasonably distributed, and meanwhile, as can be seen from the above description, the fourth lens element L4 has negative refractive power, the fifth lens element L5 has positive refractive power, and the fourth lens element L4 and the fifth lens element L5 are bonded together, such that the optical lens element 100 has a structure in which two lens elements with positive refractive power and negative refractive power are bonded together, thereby facilitating the correction of aberration of the optical lens element 100 and facilitating the aberration balance of the optical lens element 100. When the ratio is lower than the lower limit, the overall refractive power of the fourth lens element L4 and the fifth lens element L5 is too high, so that the light passing through the fourth lens element L4 and the fifth lens element L5 can easily generate serious astigmatism, which is not beneficial to improving the imaging quality of the optical lens 100; when the ratio is higher than the upper limit, the overall refractive power of the fourth lens element L4 and the fifth lens element L5 is too small, which tends to generate larger edge aberrations and chromatic aberration, resulting in a decrease in resolution performance of the optical lens 100.

In some embodiments, the fourth lens L4 is glued with the fifth lens L5, and the optical lens 100 satisfies the relationship: 13.3 < f45/|ct4-CT5| < 32, e.g., f45/|ct4-CT 5|= 13.315, 13.331, 15.367, 16.841, 18.729, 20.536, 23.267, 26.586, 28.643, 31.859, etc. Wherein f45 is a combined focal length of the fourth lens L4 and the fifth lens L5, CT4 is a thickness of the fourth lens L4 on the optical axis O (i.e., a center thickness of the fourth lens L4), and CT5 is a thickness of the fifth lens L5 on the optical axis O (i.e., a center thickness of the fifth lens L5).

By reasonably configuring the combined focal length of the fourth lens element L4 and the fifth lens element L5, the center thickness of the fourth lens element L4, and the center thickness of the fifth lens element L5, the ratio of the combined focal length of the fourth lens element L4 and the fifth lens element L5 to the difference between the center thicknesses of the fourth lens element L4 and the fifth lens element L5 is within a reasonable range, so as to reasonably distribute the refractive power of the fourth lens element L4 and the fifth lens element L5, thereby being beneficial to correcting the aberration of the optical lens 100, and meanwhile, by restricting the difference between the center thicknesses of the fourth lens element L4 and the fifth lens element L5, the quality of the fourth lens element L4 and the fifth lens element L5 can be improved, the implementation of the gluing process is not facilitated due to the excessive difference between the center thicknesses of the fourth lens element L4 and the fifth lens element L5, and the occurrence of the phenomena such as cracking or degumping due to the large difference between the center thicknesses of the fourth lens element L4 and the fifth lens element L5 is avoided when the temperature environment changes greatly.

In some embodiments, the optical lens 100 satisfies the relationship: 14 < TTL/AT23 < 212, e.g., TTL/AT23 = 14.074, 14.677, 15.708, 25.364, 50.685, 55.946, 60.358, 78.322, 210.080, 210.090, 211.041, etc. Wherein TTL is a distance from the object side surface 11 of the first lens element to the imaging surface 101 of the optical lens 100 on the optical axis O (i.e. the total length of the optical lens 100), and AT23 is a distance from the image side surface 22 of the second lens element to the object side surface 31 of the third lens element on the optical axis O (i.e. the air gap between the second lens element L2 and the third lens element L3).

By restricting the ratio of the total length of the optical lens 100 and the air gap between the second lens L2 and the third lens L3, the total length of the optical lens 100 can be controlled, the compactness of the optical lens 100 can be improved, the miniaturization of the optical lens 100 can be facilitated, and meanwhile, the air gap between the second lens L2 and the third lens L3 can be reduced, so that the tolerance sensitivity of the second lens L2 and the third lens L3 can be reduced, the risk of field curvature is reduced, and the imaging quality of the optical lens 100 is improved. When the ratio is lower than the lower limit, the air gap between the second lens L2 and the third lens L3 increases, resulting in an increase in field curvature, and an increase in focus offset of each field of view, resulting in a decrease in imaging quality of the optical lens 100; when the ratio is higher than the upper limit, the total length of the optical lens 100 is excessively large, which is disadvantageous in downsizing of the optical lens 100.

In addition, the object side surface and the image side surface of the second lens element L2 and the sixth lens element L6 are aspheric, and the surface profile of each aspheric lens element can be defined by, but not limited to, the following aspheric formula:

wherein Z is the distance from the corresponding point on the aspheric surface to the plane tangential to the surface vertex, r is the distance from any point on the aspheric surface to the optical axis, c is the curvature of the aspheric vertex, c=1/Y, Y is the radius of curvature (i.e., paraxial curvature c is the inverse of the radius Y in table 1), k is the conic constant, ai is the coefficient corresponding to the i-th term in the aspheric surface type formula.

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, the optical lens 100 according to the first embodiment of the present application includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially disposed from an object side to an image side along an optical axis O. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6 can be referred to in the above embodiments, and will not be described herein.

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

Specifically, taking the focal length f= 3.114mm of the optical lens 100, the f-number fno=1.6 of the optical lens 100, the maximum field angle fov=127 deg of the optical lens 100, the optical total length ttl= 21.001mm of the optical lens 100 as an example, other parameters of the optical lens 100 are given in table 1 below. The elements from the object side to the image side along the optical axis O of the optical lens 100 are sequentially arranged in the order of the elements from top to bottom in table 1. In the same lens element, the surface with the smaller surface number is the object side surface of the lens element, and the surface with the larger surface number is the image side surface of the lens element, and the surface numbers 1 and 2 correspond to the object side surface 11 of the first lens element and the image side surface 12 of the first lens element, 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 O. The first value in the "thickness" parameter array of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the latter surface on the optical axis O. The value of the stop STO in the "thickness" parameter row is the distance between the stop STO and the vertex of the subsequent surface (the vertex refers to the intersection of the surface and the optical axis O) on the optical axis O, and the direction from the object side surface 11 of the first lens to the image side surface of the last lens is the positive direction of the optical axis O by default. It is understood that the units of the radius, thickness and focal length of Y in table 1 are all mm, and the refractive index and abbe number in table 1 are all obtained at a reference wavelength of 587.56nm, and the reference wavelength of the focal length is 546.00nm.

K in table 2 is a conic constant, and the higher order coefficients A4, A6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror in the first embodiment are given in table 2.

TABLE 1

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows longitudinal spherical aberration diagrams of the optical lens 100 in the first embodiment at wavelengths of 656.00nm, 587.00nm, 546.00nm, 486.00nm, 435.00nm and 410.00nm, respectively. Wherein the abscissa along the X-axis represents focus offset in mm and the ordinate along the Y-axis represents normalized field of view. As can be seen from (a) in fig. 2, 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) shows an astigmatism diagram of the optical lens 100 at a wavelength of 546.00nm in the first embodiment. The abscissa along the X-axis direction represents the focus shift in mm, and the ordinate along the Y-axis direction represents the angle of view in deg. T in the astigmatism diagram indicates a curvature of the imaging surface 101 in the meridian direction, and S indicates a curvature of the imaging surface 101 in the sagittal direction. As can be seen from fig. 2 (B), at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 2 (C), fig. 2 (C) shows a distortion curve of the optical lens 100 in the first embodiment at a wavelength of 546.00nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents the angle of view in deg. As can be seen from fig. 2 (C), at this wavelength, the distortion of the optical lens 100 becomes well corrected.

Second embodiment

As shown in fig. 3, the optical lens 100 according to the second embodiment of the present application includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially disposed from an object side to an image side along an optical axis O. The materials can be referred to the above embodiments, and the refractive power and the surface shape of each lens element are the same as those of the first embodiment, which will not be repeated here.

Specifically, taking the focal length f= 3.083mm of the optical lens 100, the f-number fno=1.6 of the optical lens 100, the maximum field angle fov=127 deg of the optical lens 100, and the total optical length ttl=20.999 mm of the optical lens 100 as an example. Other parameters in this second embodiment are given in tables 3 and 4 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 3 are all mm, and the refractive index and abbe number in table 3 are all obtained at a reference wavelength of 587.56nm, and the reference wavelength of the focal length is 546.00nm.

TABLE 3 Table 3

TABLE 4 Table 4

Referring to fig. 4, as can be seen from the (a) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion diagram in fig. 4, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 in the second embodiment are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 4 (a), 4 (B) and 4 (C), reference may be made to the description in the first embodiment regarding fig. 2 (a), 2 (B) and 2 (C), and the description is omitted here.

Third embodiment

As shown in fig. 5, the optical lens 100 according to the third embodiment of the present application includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially disposed from an object side to an image side along an optical axis O. The materials may be described in the above embodiments, and will not be described herein. Further, the image-side surface 22 of the second lens element is convex at the paraxial region O, the object-side surface 41 of the fourth lens element is convex at the paraxial region O, the object-side surface 61 of the sixth lens element is convex at the paraxial region O, the image-side surface 62 of the sixth lens element is concave at the paraxial region O, and the refractive power and the surface configuration of the other lens elements are the same as those of the first embodiment, which will not be described herein.

Specifically, taking the focal length f= 3.114mm of the optical lens 100, the f-number fno=1.6 of the optical lens 100, the maximum field angle fov= 127.36deg of the optical lens 100, and the optical total length ttl= 21.008mm of the optical lens 100 as an example. Other parameters in this third embodiment are given in tables 5 and 6 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 5 are all mm, and the refractive index and abbe number in table 5 are all obtained at a reference wavelength of 587.56nm, and the reference wavelength of the focal length is 546.07nm.

TABLE 5

TABLE 6

Referring to fig. 6 (a), fig. 6 (a) shows longitudinal spherical aberration diagrams of the optical lens 100 in the third embodiment at wavelengths 656.27nm, 587.56nm, 546.07nm, 486.13nm and 435.83nm, respectively. Wherein the abscissa along the X-axis represents focus offset in mm and the ordinate along the Y-axis represents normalized field of view. As can be seen from (a) in fig. 2, the spherical aberration value of the optical lens 100 is better, which indicates that the imaging quality of the optical lens 100 in the present embodiment is better.

Referring to fig. 6 (B), fig. 6 (B) shows an astigmatism diagram of the optical lens 100 in the third embodiment at a wavelength of 546.07nm. The abscissa along the X-axis direction represents the focus shift in mm, and the ordinate along the Y-axis direction represents the angle of view in deg. T in the astigmatism diagram indicates a curvature of the imaging surface 101 in the meridian direction, and S indicates a curvature of the imaging surface 101 in the sagittal direction. As can be seen from fig. 2 (B), at this wavelength, the astigmatism of the optical lens 100 is well compensated.

Referring to fig. 2 (C), fig. 2 (C) shows a distortion curve of the optical lens 100 in the third embodiment at a wavelength of 546.07 nm. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents the angle of view in deg. As can be seen from fig. 2 (C), at this wavelength, the distortion of the optical lens 100 becomes well corrected.

Fourth embodiment

As shown in fig. 7, the optical lens 100 according to the fourth embodiment of the present application includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially disposed from an object side to an image side along an optical axis O. The materials may be described in the above embodiments, and will not be described herein. Further, the image-side surface 22 of the second lens element is convex at the paraxial region O, the object-side surface 41 of the fourth lens element is convex at the paraxial region O, the object-side surface 61 of the sixth lens element is convex at the paraxial region O, the image-side surface 62 of the sixth lens element is concave at the paraxial region O, and the refractive power and the surface configuration of the other lens elements are the same as those of the first embodiment, which will not be described herein.

Specifically, taking the focal length f= 3.112mm of the optical lens 100, the f-number fno=1.6 of the optical lens 100, the maximum field angle fov= 127.4deg of the optical lens 100, and the optical total length ttl= 21.009mm of the optical lens 100 as an example. Other parameters in this fourth embodiment are given in tables 7 and 8 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 7 are all mm, and the refractive index and abbe number in table 7 are all obtained at a reference wavelength of 587.56nm, and the reference wavelength of the focal length is 546.00nm.

TABLE 7

TABLE 8

Referring to fig. 8, as can be seen from the (a) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion diagram in fig. 8, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 in the fourth embodiment are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 8 (a), 8 (B) and 8 (C), reference may be made to the description in fig. 2 (a), 2 (B) and 2 (C) in the first embodiment, and the description is omitted here.

Fifth embodiment

As shown in fig. 9, the optical lens 100 according to the fifth embodiment of the present application includes a first lens L1, a second lens L2, a third lens L3, a stop STO, a fourth lens L4, a fifth lens L5, and a sixth lens L6, which are sequentially disposed from an object side to an image side along an optical axis O. The materials may be described in the above embodiments, and will not be described herein. Further, the object-side surface 61 of the sixth lens element is convex at the paraxial region O, the image-side surface 62 of the sixth lens element is concave at the paraxial region O, and the refractive power and the surface-type configuration of the other lens elements are the same as those of the first embodiment, which will not be described herein.

Specifically, taking the focal length f= 3.117mm of the optical lens 100, the f-number fno=1.6 of the optical lens 100, the maximum field angle fov=127 deg of the optical lens 100, and the optical total length ttl= 21.003mm of the optical lens 100 as an example. Other parameters in this fifth embodiment are given in tables 9 and 10 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 9 are all mm, and the refractive index and abbe number in table 9 are all obtained at a reference wavelength of 587.6nm, and the reference wavelength of the focal length is 546.00nm.

TABLE 9

Table 10

Referring to fig. 10, as can be seen from the (a) longitudinal spherical aberration diagram, (B) astigmatism diagram and (C) distortion diagram in fig. 10, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 in the fifth embodiment are all well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 10 (a), 10 (B) and 10 (C), reference may be made to the description in fig. 2 (a), 2 (B) and 2 (C) in the first embodiment, and the description is omitted here.

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

Referring to fig. 11, in a second aspect, 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 of the first aspect, where 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 has a large field angle while improving the imaging quality. 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, in a third aspect, the present application further discloses an electronic device 300, where the electronic device 300 includes a housing 301 and the camera module 200 according to the second aspect, and the camera module 200 is disposed on the housing 301. 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 described above. That is, the imaging quality is improved and the imaging device has the characteristic of large field angle. Since the above technical effects are described in detail in the embodiments of the optical lens, they will not be described in detail herein.

The first, second, third and various numerical numbers referred to herein are merely descriptive convenience and are not intended to limit the scope of the present application.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An optical lens element, comprising six lens elements with refractive power, in order from an object side to an image side along an optical axis:

a sixth lens element with positive refractive power;

the optical lens satisfies the following relation:

55deg＜(FOV*f)/IMGH＜60deg；

wherein FOV is the maximum field angle of the optical lens, IMGH is the diameter of the maximum effective imaging circle of the optical lens, and f is the focal length of the optical lens.

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

5.5＜SD11/SAG11＜7.5；

wherein SD11 is the maximum effective half-caliber of the object side surface of the first lens, SAG11 is the distance from the intersection point of the object side surface of the first lens and the optical axis to the maximum effective half-caliber of the object side surface of the first lens in the direction parallel to the optical axis.

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

0.7＜SD62/CT6＜2.2；

wherein SD62 is the maximum effective half-caliber of the image side surface of the sixth lens, and CT6 is the thickness of the sixth lens on the optical axis.

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

0.6＜|f12/f|＜1.8；

wherein f12 is a combined focal length of the first lens and the second lens.

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

1.2＜f123/f456＜3.5；

wherein f123 is a combined focal length of the first lens, the second lens and the third lens, and f456 is a combined focal length of the fourth lens, the fifth lens and the sixth lens.

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

5.5＜f45/f＜9.8；

wherein f45 is a combined focal length of the fourth lens and the fifth lens.

7. The optical lens of claim 1, wherein the fourth lens is cemented with the fifth lens, and the optical lens satisfies the relation:

13.3＜f45/|CT4-CT5|＜32；

wherein f45 is a combined focal length of the fourth lens and the fifth lens, CT4 is a thickness of the fourth lens on the optical axis, and CT5 is a thickness of the fifth lens on the optical axis.

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

14＜TTL/AT23＜212；

wherein TTL is a distance from an object side surface of the first lens element to an imaging surface of the optical lens element on the optical axis, and AT23 is a distance from an image side surface of the second lens element to an object side surface of the third lens element on the optical axis.

9. A camera module, its characterized in that: the camera module comprises an image sensor and the optical lens as claimed in any one of claims 1 to 8, wherein the image sensor is arranged on the image side of the optical lens.

10. An electronic device, characterized in that: the electronic device comprises a shell and the camera module set according to claim 9, wherein the camera module set is arranged on the shell.