CN114355579A

CN114355579A - Optical lens, camera module and electronic equipment

Info

Publication number: CN114355579A
Application number: CN202210234574.XA
Authority: CN
Inventors: 王国贵; 杨健; 李明
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-04-15
Anticipated expiration: 2042-03-11
Also published as: CN114355579B

Abstract

The invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element which are arranged in sequence from an object side to an image side along an optical axis, the first lens element has positive refractive power, the object side surfaces and the image side surfaces of the first lens element, the second lens element, the third lens element, the fifth lens element and the sixth lens element are respectively convex and concave at a paraxial region, the second lens element has negative refractive power, the third lens element has refractive power, the fourth lens element has positive refractive power, the fifth lens element has negative refractive power, the sixth lens element has positive refractive power, the seventh lens element has negative refractive power, and the image side surface of the seventh lens element is concave at a paraxial region. The optical lens, the camera module and the electronic equipment provided by the invention can realize the light, thin and miniaturized design of the optical lens, correct the aberration of the optical lens and improve the imaging quality of the optical lens.

Description

Optical lens, camera module and electronic equipment

Technical Field

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

Background

In recent years, with the development of imaging technology, the requirements of people on the imaging quality of optical lenses are higher and higher, and the structural characteristics of light weight and miniaturization are gradually becoming the development trend of optical lenses. In the related art, it is difficult to satisfy the requirement of high definition imaging of the optical lens for people at the same time under the design trend of light, thin and small optical lens.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can correct the aberration of the optical lens and improve the imaging quality of the optical lens while realizing the light, thin and miniaturized design of the optical lens.

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

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

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

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

the fourth lens element with positive refractive power;

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

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

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

the optical lens satisfies the following relation:

0.40<ET5/|SAG52|<1.83；

wherein ET5 is a distance in a direction parallel to the optical axis from the maximum effective aperture of the object-side surface of the fifth lens to the maximum effective aperture of the image-side surface of the fifth lens, and SAG52 is a distance in a direction parallel to the optical axis from the intersection of the image-side surface of the fifth lens and the optical axis to the maximum effective radius of the image-side surface of the fifth lens.

The optical lens provided by the application comprises a lens combination of a first lens with positive refractive power and a second lens with negative refractive power, the axial spherical aberration of the optical lens can be corrected, the positive lens and the negative lens are matched with each other to counteract the aberration generated by each other, the object side surfaces of the first lens and the second lens at the optical axis are both convex surfaces, and the image side surfaces are both concave surfaces, so that the optical lens can converge light rays with a larger angle, the optical performance of the optical lens is improved, the thicknesses of the first lens and the second lens on the optical axis can be reduced due to reasonable surface shape bending, reasonable light rays can be favorably refracted, converted and smoothly transmitted, the total optical length of the optical lens is reduced, namely, the distance from the object side surface of the first lens to the imaging surface of the optical lens on the optical axis is reduced, and the miniaturization design of the optical lens is realized; the third lens element with refractive power is favorable for correcting astigmatism of the optical lens, and the object-side surface of the third lens element at a paraxial region is convex, so that light rays can be further converged, and the total optical length of the optical lens can be shortened; the fourth lens with positive refractive power is matched with the first lens with positive refractive power, so that the total optical length of the optical lens is further shortened, and the miniaturization design of the optical lens is realized; the sixth lens element with positive refractive power and the seventh lens element with negative refractive power cooperate with each other to counteract aberrations generated thereby and help to correct curvature of field of the optical lens assembly, and the sixth lens element and the seventh lens element are used as two lens elements closest to the image plane, and the aberration can be finally corrected by reasonable surface type cooperation, i.e. the object-side surface of the sixth lens element is convex at the optical axis, so that spherical aberration, astigmatism and curvature of field of the optical lens assembly can be well corrected.

In addition, the optical lens provided by the application selects a proper number of lenses and reasonably configures the refractive power and the surface shape of each lens, so that the optical lens meets the following relational expression: 0.40< ET5/| SAG52| <1.83, the shape of the fifth lens can be reasonably configured, so that the manufacturing and the molding of the fifth lens are facilitated, the defect of poor molding is reduced, the field curvature aberration of the optical lens can be corrected, the field curvature of the optical lens is balanced, and the imaging quality of the optical lens is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.16< R51/R52< 1.80; wherein R51 is a radius of curvature of an object-side surface of the fifth lens element at an optical axis, and R52 is a radius of curvature of an image-side surface of the fifth lens element at the optical axis.

When the relation formula is satisfied, the relation between the curvature radiuses of the object side surface and the image side surface of the fifth lens at the optical axis can be reasonably constrained, so that the optical deflection angles born by the lenses are effectively distributed, the astigmatism of an off-axis field of view of the optical lens is improved, and the imaging quality of the optical lens is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 2.55< CT4/| SAG41| < 9.16; wherein, CT4 is the thickness of the fourth lens on the optical axis, SAG41 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the maximum effective radius of the object side surface of the fourth lens in the direction parallel to the optical axis.

When the relational expression is satisfied, the shape of the fourth lens can be reasonably configured, so that the manufacturing and the molding of the fourth lens are facilitated, the defect of poor molding is reduced, the field curvature aberration of the optical lens can be corrected, the field curvature of the optical lens is balanced, and the imaging quality of the optical lens is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 32< v1-v3< 37; wherein v1 is the abbe number of the first lens and v3 is the abbe number of the third lens.

When the relation 32< v1-v3<37 is satisfied, the first lens and the third lens have reasonable refractive indexes, so that the material of the first lens is matched with the material of the third lens, the optical lens has better chromatic aberration correction capability, the resolution of the optical lens is improved, and the imaging quality of the optical lens is improved. When the refractive index of the material of the third lens exceeds the upper limit of the above relational expression, the refractive index of the material of the third lens is low, the control capability of the optical path is weak, and the light deflection angle of the third lens is small in a limited air gap, so that the imaging quality of the optical lens is reduced.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 31< v1-v5< 37; wherein v1 is the abbe number of the first lens, and v5 is the abbe number of the fifth lens.

When the relation is satisfied, the first lens and the fifth lens have reasonable refractive indexes, and the material of the first lens is matched with the material of the fifth lens, so that the optical lens has better chromatic aberration correction capability, the resolution of the optical lens is improved, and the imaging quality of the optical lens is improved. When the refractive index of the fifth lens exceeds the upper limit of the above relational expression, the refractive index of the fifth lens is low, the control capability of the fifth lens on the light path is weak, and the deflection angle of the light is small in a limited air gap, so that the imaging quality of the optical lens is reduced.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.79< f1/f <1.16, and/or-4.1 < f2/f < -1.9, and/or, 2.20< | f4/f <5.2, and/or, 0.9< f6/f <1.10, and/or-1 < f7/f < -0.6; wherein f is an effective focal length of the optical lens, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f4 is a focal length of the fourth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens.

When the above relation 0.79< f1/f <1.16 is satisfied, the convex surface shape of the object-side surface of the first lens element can better balance the surface shape configuration of the second lens element and the third lens element protruding toward the object-side surface, and the image plane of the optical lens assembly can be increased by combining the fourth lens element to the seventh lens element, and when f1/f is greater than or equal to 1.16, the object-side surface of the first lens element is too gentle at the paraxial region, which results in a smaller absolute value of the radius of curvature of the image-side surface of the third lens element at the optical axis, i.e., the curvature of the image-side surface of the third lens element at the paraxial region is larger, which results in a steeper surface shape sensitivity of the optical lens assembly and is not favorable for injection molding of the third lens element.

When the above relation-4.1 < f2/f < -1.9 is satisfied, it is beneficial to reduce the on-axis spherical aberration of the optical lens under the condition that the front lens group has positive refractive power and the rear lens group has negative refractive power, and simultaneously correct the optical path direction from the fifth lens element to the sixth lens element to reduce the optical distortion of the optical lens, wherein the front lens group includes the first lens element to the third lens element, and the rear lens group includes the sixth lens element and the seventh lens element.

When the relation 2.20< | f4/f | <5.2 is satisfied, the focal lengths of the lenses of the optical lens are favorably and reasonably distributed, so that the rear lens group has proper negative refractive power, light rays are dispersed through the rear lens group, the aberration of the optical lens is corrected, the imaging distance of the optical lens is controlled, the imaging surface of the optical lens is enlarged, and the total length of the optical lens is favorably compressed. If | f4/f | > is not less than 5.2, the refractive power of the rear lens group is weak, which is not favorable for enlarging the imaging surface of the optical lens, and if | f4/f | > is not more than 2.20, the negative refractive power of the rear lens group is too strong, which is not favorable for compressing the total length of the optical lens.

When the relation 0.9< f6/f <1.10 is satisfied, the total length of the optical lens is compressed, and the light, thin and small design of the optical lens is realized.

When the relation-1 < f7/f < -0.6 is satisfied, the rear lens group can have proper negative refractive power, if f7/f is more than or equal to-0.6, the refractive power of the rear lens group is weaker, which is not beneficial to enlarging the imaging surface of the optical lens, and if f7/f is less than or equal to-1, the negative refractive power of the rear lens group is too strong, which is not beneficial to compressing the total length of the optical lens.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -0.1< f2/f3< 1.2; wherein f2 is the focal length of the second lens, and f3 is the focal length of the third lens. When the relation-0.1 < f2/f3<1.2 is satisfied, the focal lengths of the lenses of the optical lens are favorably and reasonably distributed, so that the rear lens group has proper negative refractive power, light rays are dispersed through the rear lens group, the aberration of the optical lens is corrected, the imaging distance of the optical lens is controlled, the imaging surface of the optical lens is enlarged, and the total length of the optical lens is favorably compressed. When f2/f3 is larger than or equal to 1.2, the refractive power of the rear lens group is weak, which is not beneficial to enlarging the imaging surface of the optical lens, and when f2/f3 is smaller than or equal to-0.1, the negative refractive power of the rear lens group is too strong, which is not beneficial to compressing the total length of the optical lens.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -466.40< f3/R32< 110.11; wherein f3 is a focal length of the third lens, and R32 is a radius of curvature of an image side surface of the third lens at an optical axis. When the relation formula is satisfied, the aberration of the optical lens can be balanced, and the high-order aberration generated by the second lens can be further corrected, so that the imaging quality of the optical lens is improved.

In a second aspect, the present invention discloses a camera module, which includes a photosensitive chip and the optical lens according to the first aspect, wherein the photosensitive chip is disposed on an image side of the optical lens. The camera module with the optical lens can correct the aberration of the optical lens and improve the imaging quality of the optical lens while realizing the light, thin and small design of the optical lens.

In a third aspect, the invention discloses an electronic device, which includes a housing and the camera module set of the second aspect, wherein the camera module set is disposed on the housing. The electronic equipment with the camera module can correct the aberration of the optical lens and improve the imaging quality of the optical lens while realizing the light, thin and small design of the optical lens.

Compared with the prior art, the invention has the beneficial effects that: according to the optical lens, the camera module and the electronic device provided by the embodiment of the invention, the optical lens adopts seven lenses, and the refractive power and the surface shape of each lens are designed, and simultaneously the optical lens meets the following relational expression: 0.40< ET5/| SAG52| <1.83, can shorten the total length of the optical lens, simultaneously, the shape of the fifth lens is configured reasonably, which is beneficial to the manufacture and the molding of the fifth lens, reduces the defect of poor molding of the optical lens, corrects the curvature of field aberration of the optical lens, balances the curvature of field of the optical lens and improves the imaging quality of the optical lens.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used 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 it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

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

fig. 2 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

fig. 4 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 6 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 8 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

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

fig. 10 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 11 is a schematic structural diagram of the camera module disclosed in the present application;

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can 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 meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1, according to a first aspect of the present application, an optical lens 100 is disclosed, where 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. 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 is finally imaged on the imaging surface 101 of the optical lens 100. The first lens element L1 with positive refractive power, the second lens element L2 with negative refractive power, the third lens element L3 with refractive power (e.g., positive refractive power or negative refractive power), the fourth lens element L4 with positive refractive power, the fifth lens element L5 with negative refractive power, the sixth lens element L6 with positive refractive power, and the seventh lens element L7 with negative refractive power.

Further, the object-side surface S1 of the first lens element L1 may be convex at the paraxial region O, the image-side surface S2 of the first lens element L1 may be concave at the paraxial region O, the object-side surface S3 of the second lens element L2 may be convex at the paraxial region O, the image-side surface S4 of the second lens element L2 may be concave at the paraxial region O, the object-side surface S5 of the third lens element L3 may be convex at the paraxial region O, the image-side surface S6 of the third lens element L3 may be concave at the paraxial region O, the object-side surface S7 of the fourth lens element L4 may be convex or concave at the paraxial region O, the image-side surface S8 of the fourth lens element L4 may be convex or concave at the paraxial region O, the object-side surface S9 of the fifth lens element L5 may be convex at the paraxial region O, the image-side surface S10 of the fifth lens element L68628 may be convex at the paraxial region O, the sixth lens element L862 may be convex at the paraxial region O, the second lens element S8653, the object-side surface S13 of the seventh lens element L7 may be convex or concave at the paraxial region O, and the image-side surface S14 of the seventh lens element L7 may be concave at the paraxial region O.

In view of the above, the optical lens assembly 100 includes the combination of the first lens element L1 with positive refractive power and the second lens element L2 with negative refractive power, which is favorable for correcting the on-axis spherical aberration of the optical lens assembly 100, and the positive and negative lenses cooperate with each other to cancel out the aberration generated by each other, the object-side surfaces of the first lens L1 and the second lens L2 at the optical axis O are both convex surfaces, and the image side surfaces are concave surfaces, which is not only beneficial for the optical lens 100 to converge light rays with larger angles and improve the optical performance of the optical lens 100, moreover, the reasonable surface-type curvature can also reduce the thickness of the first lens L1 and the second lens L2 on the optical axis O, and is beneficial to reasonably turning and smoothly transmitting the light rays, thereby reducing the total optical length of the optical lens 100, that is, the distance on the optical axis O from the object-side surface S1 of the first lens L1 to the image plane 101 of the optical lens 100 is reduced, thereby realizing a compact design of the optical lens 100; the third lens element L3 with refractive power is favorable for correcting astigmatism of the optical lens element 100, and the object-side surface of the third lens element L3 near the optical axis O is convex, so that light rays can be further converged, and the total optical length of the optical lens element 100 can be shortened; the fourth lens element L4 with positive refractive power, in cooperation with the first lens element L1 with positive refractive power, is beneficial to further shortening the total optical length of the optical lens 100 and realizing the miniaturized design of the optical lens 100; the sixth lens element L6 with positive refractive power and the seventh lens element L7 with negative refractive power cooperate with each other to cancel out aberrations generated thereby, which helps to correct curvature of field of the optical lens system 100, and the sixth lens element L6 and the seventh lens element L7 are used as two lens elements closest to the image plane 101, and the aberration can be finally corrected by reasonable surface type cooperation, i.e. the object-side surface of the sixth lens element L6 is convex at the optical axis O, which can well correct spherical aberration, astigmatism and curvature of field of the optical lens system 100, and the image-side surface of the seventh lens element L7 is concave at the optical axis O, which can reduce the design sensitivity of the optical lens system 100 and is beneficial to the engineering manufacture of the optical lens system 100.

In some embodiments, the optical lens 100 may be applied to electronic devices such as smart phones and smart tablets, and 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 made of plastic, so that the optical lens 100 has a good optical effect and the optical lens 100 has good portability. In addition, the plastic material facilitates the processing of the lens, thereby reducing the processing cost of the optical lens 100.

In some embodiments, at least one lens of the optical lens 100 may be made of glass, and the lens made of glass can endure higher or lower temperature and has excellent optical effect and better stability. In some embodiments, at least two lenses made of different materials may be further disposed in the optical lens 100, for example, a combination of a glass lens and a plastic lens may be adopted, but the specific configuration relationship may be determined according to practical requirements, which is not exhaustive here.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop or a field stop, which may be disposed between the object side of the optical lens 100 and the object side S1 of the first lens L1. It is understood that, in other embodiments, the stop 102 may also be disposed between two adjacent lenses, for example, between the second lens L2 and the third lens L3, and the arrangement is adjusted according to the actual situation, which is not specifically limited in this embodiment.

In some embodiments, the optical lens 100 further includes a filter L8, such as an infrared filter, disposed between the image side surface S14 of the seventh lens element L7 and the image plane 101 of the optical lens 100, so as to filter out light in other bands, such as visible light, and only allow infrared light to pass through, and therefore the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can image in a dark environment and other special application scenes and can obtain a better image effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.40< ET5/| SAG52| < 1.83. ET5 is the distance in the direction parallel to the optical axis O from the maximum effective aperture of the object-side surface S9 of the fifth lens L5 to the maximum effective aperture of the image-side surface S10 of the fifth lens L5, and SAG52 is the distance in the direction parallel to the optical axis O from the intersection of the image-side surface S10 of the fifth lens L5 and the optical axis O to the maximum effective radius of the image-side surface S10 of the fifth lens L5.

When the above relational expression is satisfied, the shape of the fifth lens L5 can be configured reasonably, which is beneficial to the manufacture and molding of the fifth lens L5, reduces the defect of poor molding, corrects the curvature of field aberration of the optical lens 100, balances the curvature of field of the optical lens 100, and improves the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.16< R51/R52< 1.80. Wherein R51 is the radius of curvature of the object-side surface S9 of the fifth lens element L5 on the optical axis O, and R52 is the radius of curvature of the image-side surface S10 of the fifth lens element L5 on the optical axis O.

When the above relational expression is satisfied, the relationship between the curvature radii of the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 at the optical axis O can be reasonably constrained, so that the optical deflection angles borne by the respective lens elements are effectively distributed, the off-axis field astigmatism of the optical lens 100 is improved, and the imaging quality of the optical lens 100 is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: 2.55< CT4/| SAG41| < 9.16. Wherein, CT4 is the thickness of the fourth lens L4 on the optical axis O, and SAG41 is the distance from the intersection point of the object-side surface S7 of the fourth lens L4 and the optical axis O to the maximum effective radius of the object-side surface S7 of the fourth lens L4 in the direction parallel to the optical axis O.

When the above relational expression is satisfied, the shape of the fourth lens L4 can be configured reasonably, which is beneficial to the manufacture and molding of the fourth lens L4, reduces the defect of poor molding, corrects the curvature of field aberration of the optical lens 100, balances the curvature of field of the optical lens 100, and improves the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 31< v1-v5< 37. Where v1 is the abbe number of the first lens L1, and v5 is the abbe number of the fifth lens L5. When the above relation is satisfied, the first lens L1 and the fifth lens L5 have reasonable refractive indexes, and the material of the first lens L1 is matched with the material of the fifth lens L5, so that the optical lens 100 has better chromatic aberration correction capability, the resolution of the optical lens 100 is improved, and the imaging quality of the optical lens 100 is improved. When the refractive index of the fifth lens element L5 is lower than the upper limit of the above relation, the controllability of the optical path is weaker, and the deflection angle of the light is smaller in the limited air gap, which results in the degradation of the image quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 32< v1-v3< 37. Where v3 is the abbe number of the third lens L3. When the relation 32< v1-v3<37 is satisfied, the first lens L1 and the third lens L3 have reasonable refractive indexes, and the material of the first lens L1 is matched with the material of the third lens L3, so that the optical lens 100 has good chromatic aberration correction capability, the resolution of the optical lens 100 is improved, and the imaging quality of the optical lens 100 is improved. When the refractive index of the material of the third lens element L3 is lower than the upper limit of the above relation, the controllability of the optical path is weaker, and the deflection angle of the light in the limited air gap is smaller, which results in the degradation of the image quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.79< f1/f < 1.16. Where f is the effective focal length of the optical lens 100, and f1 is the focal length of the first lens L1. When the above relation 0.79< f1/f <1.16 is satisfied, the convex surface shape of the object-side surface S1 of the first lens L1 can better balance the surface shape arrangement of the second lens L2 and the third lens L3 protruding toward the object-side surface, and the imaging surface 101 of the optical lens 100 can be increased by matching the fourth lens L4 to the seventh lens L7, and when f1/f is greater than or equal to 1.16, the object-side surface S1 of the first lens L1 is too gentle at the paraxial region O, which results in an absolute value of the radius of curvature of the image-side surface S6 of the third lens L3 at the optical axis O being too small, that is, the curvature of the image-side surface S6 of the third lens L3 at the paraxial region O is too large, which results in a steep increase in the surface shape sensitivity of the optical lens 100, which is not favorable for injection molding of the third lens L3.

In some embodiments, the optical lens 100 satisfies the following relationship: -4.1< f2/f < -1.9. Where f is the effective focal length of the optical lens 100, and f2 is the focal length of the second lens L2. When the above relation-4.1 < f2/f < -1.9 is satisfied, it is beneficial to reduce the on-axis spherical aberration of the optical lens 100, and modify the optical path from the fifth lens L5 to the sixth lens L6 to reduce the optical distortion of the optical lens 100 under the condition that the front lens group has positive refractive power and the rear lens group has negative refractive power, where the front lens group includes the first lens L1 to the third lens L3 and the rear lens group includes the sixth lens L6 and the seventh lens L7.

In some embodiments, the optical lens 100 satisfies the following relationship: 2.20< | f4/f | < 5.2. Where f is the effective focal length of the optical lens 100, and f4 is the focal length of the fourth lens element L4. When the above relation 2.20< | f4/f | <5.2 is satisfied, it is beneficial to reasonably distribute the focal lengths of the lenses of the optical lens 100, so that the rear lens group has a suitable negative refractive power, and further the rear lens group diverges light rays, corrects the aberration of the optical lens 100, controls the imaging distance of the optical lens 100, increases the imaging surface 101 of the optical lens 100, and is beneficial to compressing the total length of the optical lens 100. If | f4/f | > is not less than 5.2, the refractive power of the rear lens group is weak, which is not favorable for enlarging the image plane 101 of the optical lens 100, and if | f4/f | > is not more than 2.20, the negative refractive power of the rear lens group is too strong, which is not favorable for compressing the total length of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.9< f6/f < 1.10. Where f is the effective focal length of the optical lens 100, and f6 is the focal length of the sixth lens element L6. When the above relation 0.9< f6/f <1.10 is satisfied, it is advantageous to compress the total length of the optical lens 100, and to realize a slim and compact design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -1< f7/f < -0.6. Where f is the effective focal length of the optical lens 100, and f7 is the focal length of the seventh lens L7. When the relation-1 < f7/f < -0.6 is satisfied, the rear lens group can have a suitable negative refractive power, if f7/f is greater than or equal to-0.6, the refractive power of the rear lens group is weak, which is not favorable for enlarging the image plane 101 of the optical lens 100, and if f7/f is less than or equal to-1, the negative refractive power of the rear lens group is too strong, which is not favorable for compressing the total length of the optical lens 100.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens 100 satisfies the following relation: -0.1< f2/f3< 1.2; where f2 is the focal length of the second lens L2, and f3 is the focal length of the third lens L3. When the above relation-0.1 < f2/f3<1.2 is satisfied, it is beneficial to reasonably distribute the focal lengths of the lenses of the optical lens 100, so that the rear lens group has a suitable negative refractive power, and further the rear lens group disperses the light, corrects the aberration of the optical lens 100, controls the imaging distance of the optical lens 100, increases the imaging surface 101 of the optical lens 100, and is beneficial to compressing the total length of the optical lens 100. When f2/f3 is greater than or equal to 1.2, the refractive power of the rear lens group is weak, which is not favorable for enlarging the image plane 101 of the optical lens 100, and when f2/f3 is less than or equal to-0.1, the negative refractive power of the rear lens group is too strong, which is not favorable for compressing the total length of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -0.1< f2/f3< 1.2. Where f2 is the focal length of the second lens L2, and f3 is the focal length of the third lens L3. When the above-mentioned relation-0.1 < f2/f3<1.2 is satisfied, the third lens element L3 group can have a suitable negative refractive power, and if it is higher than the upper limit of the above-mentioned relation, the refractive power of the third lens element L3 group is weaker, which is not favorable for increasing the image plane 101 of the optical lens assembly 100, and if it is lower than the lower limit of the above-mentioned relation, the negative refractive power of the third lens element L3 group is too strong, which is not favorable for compressing the total length of the optical lens assembly 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -466.40< f3/R32< 110.11. Where f3 is the focal length of the third lens L3, and R32 is the radius of curvature of the image-side surface S6 of the third lens L3 at the optical axis O. When the above relational expression is satisfied, the aberrations of the optical lens 100 can be balanced, and the high-order aberrations generated by the second lens L2 can be further corrected, thereby improving the imaging quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.5< FNO < 1.9. Wherein FNO is the f-number of the optical lens 100. When the relational expression is satisfied, it is advantageous that the optical lens 100 has a characteristic of a large aperture. Preferably, 1.5< FNO ≦ 1.8.

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

First embodiment

A schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application is shown in fig. 1, where the optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and an optical filter L8, which are arranged in order from an object side to an image side along an optical axis O. For 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, reference may be made to the above-mentioned embodiments, which are not described herein again.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has positive refractive power, the fifth lens element L5 has negative refractive power, the sixth lens element L6 has positive refractive power, and the seventh lens element L7 has negative refractive power.

Further, the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex and concave, respectively, at the paraxial region O; the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex and concave, respectively, at the circumference. The object-side surface S3 and the image-side surface S4 of the second lens element L2 are convex and concave, respectively, at a paraxial region O; the object-side surface S3 and the image-side surface S4 of the second lens L2 are convex and concave, respectively, at the circumference. The object-side surface S5 and the image-side surface S6 of the third lens element L3 are convex and concave, respectively, at a paraxial region O; the object-side surface S5 and the image-side surface S6 of the third lens L3 are concave and convex, respectively, at the circumference. The object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are concave and convex, respectively, at a paraxial region O; the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are concave and convex, respectively, at the circumference. The object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are convex and concave, respectively, at a paraxial region O; the object-side surface S9 and the image-side surface S10 of the fifth lens L5 are concave and convex, respectively, at the circumference. The object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are convex and concave, respectively, at a paraxial region O; the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are concave and convex, respectively, at the circumference. The object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are both concave at the paraxial region O, and the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are both convex at the circumference.

Specifically, taking as an example the effective focal length f =4.93mm of the optical lens 100, the maximum field angle FOV =87.2 ° of the optical lens 100, the total optical length TTL =5.66mm of the optical lens 100, and the f-number FNO =1.88, the other parameters of the optical lens 100 are given by table 1 below. The elements of the optical lens 100 from the object side to the image side along the optical axis O are arranged in the order of the elements from top to bottom in table 1. In the same lens, the surface with the smaller number of surfaces is the object side surface of the lens, and the surface with the larger number of surfaces is the image side surface of the lens, and for example, the

numbers

2 and 3 correspond to the object side surface S1 and the image side surface S2 of the first lens L1, respectively. The Y radius in table 1 is the radius of curvature of the object-side or image-side surface of the respective surface number at the paraxial region O. The first value in the "thickness" parameter list of a lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis O. The numerical value of the stop 102 in the "thickness" parameter column is the distance on the optical axis O from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis O), the direction from the object side to the image side of the last lens of the first lens L1 is the positive direction of the optical axis O, when the value is negative, it indicates that the stop 102 is disposed on the image side of the vertex of the next surface, and if the thickness of the stop 102 is a positive value, the stop 102 is disposed on the object side of the vertex of the next surface. It is understood that the units of the radius Y, the thickness and the focal length in table 1 are mm, and the reference wavelength of the refractive index and the abbe number of each lens in table 1 is 587.6nm, and the reference wavelength of the focal length is 555 nm.

TABLE 1

In the first embodiment, the object-side surface and the image-side surface of any one of the first lens L1 through the seventh lens L7 are aspheric, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius R of Y in table 1 above); k is a conic coefficient; ai is a correction coefficient corresponding to the high-order term of the ith aspheric term. Table 2 shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for the respective aspherical lenses S1 through S14 in the first embodiment.

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows a longitudinal spherical aberration diagram of the optical lens 100 in the first embodiment at wavelengths of 470nm, 510nm, 555nm, 610nm and 650 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 2 (B), fig. 2 (B) is a graph of astigmatism of the optical lens 100 in the first embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 2 that the astigmatism of the optical lens 100 is well compensated at this wavelength.

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 555 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 (C) in fig. 2, the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

Second embodiment

Referring to fig. 3, fig. 3 is a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis O. For 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, reference may be made to the above-mentioned embodiments, which are not described herein again.

Further, in the second embodiment, the refractive power of each lens element is different from that of each lens element in the first embodiment in that: the third lens element L3 has negative refractive power. In the second embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are both concave at their circumferences, the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are respectively convex and concave at the paraxial region O, and the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are respectively convex and concave at their circumferences.

The second embodiment exemplifies effective focal length f =6.019mm of the optical lens 100, maximum field angle FOV =81.4 ° of the optical lens 100, total optical length TTL =6.20mm of the optical lens 100, and f-number FNO = 1.88. The other parameters in the second embodiment are given in table 3 below, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 3 are all mm. The reference wavelength of refractive index and Abbe number of each lens in Table 3 was 587.6nm, and the reference wavelength of focal length was 555 nm.

TABLE 3

In the second embodiment, table 4 gives the high-order term coefficients that can be used for each aspherical lens in the second embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 4

Referring to fig. 4, as can be seen from the longitudinal spherical aberration diagram (a), the astigmatism diagram (B) and the distortion diagram (C) in fig. 4, the longitudinal spherical aberration, the astigmatism and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 4 (a), fig. 4 (B), and fig. 4 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Third embodiment

Referring to fig. 5, fig. 5 is a schematic structural diagram of an optical lens 100 according to a third embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis O. For 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, reference may be made to the above-mentioned embodiments, which are not described herein again.

Further, in the third embodiment, the refractive power of each lens element is different from that of each lens element in the first embodiment in that: the third lens element L3 has negative refractive power. Meanwhile, in the third embodiment, the surface shape of each lens is different from that of each lens in the first embodiment in that: the object-side surface S7 and the image-side surface S8 of the fourth lens L4 are convex at the circumference.

The third embodiment exemplifies effective focal length f =5.40mm of the optical lens 100, maximum field angle FOV =88.1 ° of the optical lens 100, total optical length TTL =6.20mm of the optical lens 100, and f-number FNO = 1.88. The other parameters in the third embodiment are given in table 5 below, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 5 are mm, and the reference wavelength of the refractive index and the abbe number of each lens in table 5 is 587.6nm, and the reference wavelength of the focal length is 555 nm.

TABLE 5

In the third embodiment, table 6 gives the high-order term coefficients that can be used for each aspherical lens in the third embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 6

Referring to fig. 6, as shown in the longitudinal spherical aberration diagram (a), the astigmatism diagram (B), and the distortion diagram (C) of fig. 6, the longitudinal spherical aberration, astigmatism, and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 6 (a), fig. 6 (B), and fig. 6 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Fourth embodiment

Referring to fig. 7, fig. 7 is a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis O. For 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, reference may be made to the above-mentioned embodiments, which are not described herein again.

Further, in the fourth embodiment, the refractive power of each lens element differs from that of each lens element in the first embodiment in that: the third lens element L3 has negative refractive power. In the fourth embodiment, the surface shape of each lens differs from that of the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are both concave at the circumference, the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are both convex at the paraxial region O, the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are both convex at the circumference, and the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are respectively convex and concave at the paraxial region O.

The fourth embodiment exemplifies effective focal length f = 6.855mm of the optical lens 100, maximum field angle FOV =83.2 ° of the optical lens 100, total optical length TTL =8.88mm of the optical lens 100, and f-number FNO = 1.55. The other parameters in the fourth embodiment are given in table 7 below, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 7 are mm, and the reference wavelength of the refractive index and the abbe number of each lens in table 7 is 587.6nm, and the reference wavelength of the focal length is 555 nm.

TABLE 7

In the fourth embodiment, table 8 gives the high-order term coefficients that can be used for each aspherical lens in the fourth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

TABLE 8

Referring to fig. 8, as can be seen from the longitudinal spherical aberration diagram (a), the astigmatism diagram (B) and the distortion diagram (C) in fig. 8, the longitudinal spherical aberration, the astigmatism and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 8 (a), fig. 8 (B), and fig. 8 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Fifth embodiment

Referring to fig. 9, fig. 9 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present application. The optical lens 100 includes a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, and a filter L8, which are disposed in this order from the object side to the image side along the optical axis O. For 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, reference may be made to the above-mentioned embodiments, which are not described herein again.

Further, in the fifth embodiment, the refractive power of each lens element differs from that of each lens element in the first embodiment in that: the third lens element L3 has negative refractive power. In the fifth embodiment, however, the surface shape of each lens differs from that of the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are both concave at their circumferences, the object-side surface S7 and the image-side surface S8 of the fourth lens element L4 are both convex at the paraxial region O, and the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are respectively convex and concave at the paraxial region O.

The fifth embodiment exemplifies effective focal length f =7.093mm of the optical lens 100, maximum field angle FOV =81.2 ° of the optical lens 100, total optical length TTL =8.778mm of the optical lens 100, and f-number FNO = 1.68. The other parameters in the fifth embodiment are given in table 9 below, and the definitions of the parameters can be obtained from the description of the previous embodiments, which are not repeated herein. It is understood that the units of the radius Y, the thickness and the focal length in table 9 are mm, and the reference wavelength of the refractive index and the abbe number of each lens in table 9 is 587.6nm, and the reference wavelength of the focal length is 555 nm.

TABLE 9

In the fifth embodiment, table 10 gives the high-order term coefficients that can be used for each aspherical lens in the fifth embodiment, wherein each aspherical surface type can be defined by the formula given in the first embodiment.

Watch 10

Referring to fig. 10, as can be seen from the longitudinal spherical aberration diagram (a), the astigmatism diagram (B) and the distortion diagram (C) in fig. 10, the longitudinal spherical aberration, the astigmatism and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 10 (a), fig. 10 (B), and fig. 10 (C), the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C) may be referred to, and details thereof are not repeated herein.

Referring to table 11, table 11 summarizes ratios of the relations in the first embodiment to the fifth embodiment of the present application.

TABLE 11

Referring to fig. 11, the present application further discloses a camera module, where the camera module 200 includes a photo sensor 201 and the optical lens 100, and the photo sensor 201 is disposed at an image side of the optical lens 100. The optical lens 100 may be configured to receive a light signal of a subject and project the light signal to the light sensing chip 201, and the light sensing chip 201 may be configured to convert the light signal corresponding to the subject into an image signal. It can be understood that the image capturing module 200 having the optical lens 100 can correct the aberration of the optical lens 100 and improve the imaging quality of the optical lens 100 while realizing the light, thin and compact design of the optical lens 100.

Referring to fig. 12, the present application further discloses an electronic device, where the electronic device 300 includes a housing 301 and the camera module 200, and the camera module 200 is disposed on the housing 301 to obtain image information. 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, and the like. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the electronic device 300 can correct the aberration of the optical lens 100 and improve the imaging quality of the optical lens 100 while realizing a light, thin and compact design of the optical lens 100.

The optical lens, the camera module and the electronic device disclosed in the embodiments of the present invention are described in detail above, and the principle and the embodiments of the present invention are explained in detail herein by applying specific examples, and the description of the embodiments above is only used to help understanding the optical lens, the camera module and the electronic device and the core ideas thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. An optical lens barrel comprising, in order from an object side to an image side along an optical axis, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element:

the fourth lens element with positive refractive power;

the optical lens satisfies the following relation:

0.40<ET5/|SAG52|<1.83；

2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: 1.16< R51/R52< 1.80;

wherein R51 is a radius of curvature of an object-side surface of the fifth lens element at an optical axis, and R52 is a radius of curvature of an image-side surface of the fifth lens element at the optical axis.

3. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: 2.55< CT4/| SAG41| < 9.16;

wherein, CT4 is the thickness of the fourth lens on the optical axis, SAG41 is the distance from the intersection point of the object side surface of the fourth lens and the optical axis to the maximum effective radius of the object side surface of the fourth lens in the direction parallel to the optical axis.

4. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: 32< v1-v3< 37;

wherein v1 is the abbe number of the first lens and v3 is the abbe number of the third lens.

5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

31<v1-v5<37；

wherein v1 is the abbe number of the first lens, and v5 is the abbe number of the fifth lens.

6. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: 0.79< f1/f <1.16, and/or-4.1 < f2/f < -1.9, and/or, 2.20< | f4/f <5.2, and/or, 0.9< f6/f <1.10, and/or-1 < f7/f < -0.6;

wherein f is an effective focal length of the optical lens, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f4 is a focal length of the fourth lens, f6 is a focal length of the sixth lens, and f7 is a focal length of the seventh lens.

7. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: -0.1< f2/f3< 1.2;

wherein f2 is the focal length of the second lens, and f3 is the focal length of the third lens.

8. An optical lens according to claim 1, wherein the optical lens satisfies the following relation: -466.40< f3/R32< 110.11;

wherein f3 is a focal length of the third lens, and R32 is a radius of curvature of an image side surface of the third lens at an optical axis.

9. A camera module, comprising a photo sensor chip and the optical lens of any one of claims 1-8, wherein the photo sensor chip is disposed on an image side of the optical lens.

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