CN115373119A

CN115373119A - Optical lens, camera module and electronic equipment

Info

Publication number: CN115373119A
Application number: CN202211317687.2A
Authority: CN
Inventors: 张文燕; 徐标; 李翔宇
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2022-11-22
Anticipated expiration: 2042-10-26
Also published as: CN115373119B

Abstract

The invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises five lenses with refractive power, the five lenses are a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis in sequence, the refractive power of the first lens to the fifth lens is positive, negative and positive in sequence, the object side surface and the image side surface of the first lens and the fifth lens at a paraxial region are convex surfaces, the object side surface and the image side surface of the second lens at the paraxial region are respectively convex surfaces and concave surfaces, the object side surface of the fourth lens at the paraxial region is a concave surface, and the optical lens meets the following relational expressions: -6.5< -R10/f < -0.1; wherein, R10 is a curvature radius of an image-side surface of the fifth lens element at the optical axis, and f is a focal length of the optical lens assembly. 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 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, people have higher and higher requirements for the imaging quality of optical lenses, 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 improve the imaging quality of the optical lens while realizing the light, thin and small design of the optical lens.

In order to achieve the above object, in a first aspect, the present invention discloses an optical lens assembly, which includes five lens elements with refractive power, wherein the five lens elements include, 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 and a fifth lens element;

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

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

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

the optical lens satisfies the following relation: -6.5 sR10/f < -0.1;

wherein R10 is a curvature radius of an image-side surface of the fifth lens element at the optical axis, and f is a focal length of the optical lens assembly. In the optical lens provided by the application, the first lens has positive refractive power, plays a role in converging light rays, is beneficial to the entrance of large-angle incident light rays into an optical system, and enables the optical system to have a larger field angle so as to meet the requirement of the optical system on the shooting range; the first lens adopts a biconvex surface type at the optical axis, so that the positive refractive power of the first lens can be enhanced, and the total length of the optical system can be shortened; 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, and is favorable for correcting distortion of the optical lens and improving imaging quality; the third lens element with negative refractive power can counteract spherical aberration, coma aberration and other aberrations generated by the first lens element or the second lens element; the fourth lens element with negative refractive power has a concave object-side surface at paraxial region, and is favorable for correcting distortion, astigmatism and field curvature of incident light beam passing through the lens element, thereby improving imaging quality; the fifth lens element with positive refractive power has a convex surface at a paraxial region in cooperation with the fifth lens element, thereby balancing aberration of the fourth lens element, further improving imaging quality of the optical lens assembly, and further reducing light rays, thereby shortening total length of the optical lens assembly.

Further, the optical lens satisfies the relation: -6.5 sR10/f < -0.1. When the relation is satisfied, the curvature radius of the image side surface of the fifth lens at the optical axis and the focal length of the optical lens can be controlled within a reasonable range, so that the astigmatism, the field curvature and the distortion of the optical lens can be corrected, the optical total length of the optical lens can be compressed, and the design requirement of light weight and small size of the optical lens can be met. If the value is below the lower limit of the above relational expression, the curvature radius of the image-side surface of the fifth lens element on the optical axis is too large, so that the surface profile of the fifth lens element is too gentle, and it becomes difficult to sufficiently correct astigmatism, curvature of field, and distortion; when the upper limit of the relation is exceeded, the curvature radius of the image side surface of the fifth lens at the optical axis is too small, so that the surface curvature of the fifth lens is too large, the sensitivity of the fifth lens is increased, and the engineering manufacturing of the fifth lens is not facilitated.

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 aberrations such as distortion, astigmatism, field curvature and the like of the optical lens while reducing the optical total length of the optical lens and realizing the light, thin and miniaturized design of the optical lens, and improve the imaging quality of the optical lens.

In a third aspect, the invention further discloses an electronic device, which includes a housing and the camera module set according to the second aspect, and the camera module set is disposed on the housing. The electronic equipment with the camera module can reduce the optical total length of the optical lens, realize the light, thin and small design of the optical lens, correct aberrations such as distortion, astigmatism, field curvature and the like of the optical lens and improve the imaging quality 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 five lenses, and the optical lens meets the relational expression by designing the refractive power and the surface shape of the five lenses: -6.5 and R10/f < -0.1, so as to control the curvature radius of the image side surface of the fifth lens at the optical axis and the focal length of the optical lens within a reasonable range, thereby being beneficial to correcting astigmatism, curvature of field and distortion of the optical lens, compressing the optical total length of the optical lens and realizing the design requirement of light weight and miniaturization 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 a 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 view of an optical lens disclosed in a sixth embodiment of the present application;

fig. 12 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 13 is a schematic structural diagram of an optical lens disclosed in a seventh embodiment of the present application;

fig. 14 is a longitudinal spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 15 is a schematic structural diagram of the camera module disclosed in the present application;

fig. 16 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.

Referring to fig. 1, according to a first aspect of the present application, the present application discloses an optical lens 100, in which the optical lens 100 includes five lens elements with refractive power, and the five lens elements include a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4 and a fifth lens element L5 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, and the fifth lens L5 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 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has negative refractive power, and the fifth lens element L5 has positive refractive power. The object-side surface S1 of the first lens element L1 can be convex at a paraxial region O, the image-side surface S2 of the first lens element L1 can be convex at the paraxial region O, the object-side surface S3 of the second lens element L2 can be convex at the paraxial region O, the image-side surface S4 of the second lens element L2 can be concave at the paraxial region O, the object-side surface S5 of the third lens element L3 can be convex or concave at the paraxial region O, the image-side surface S6 of the third lens element L3 can be convex or concave at the paraxial region O, the object-side surface S7 of the fourth lens element L4 can be concave at the paraxial region O, the image-side surface S8 of the fourth lens element L4 can be convex or concave at the paraxial region O, the object-side surface S9 of the fifth lens element L5 can be convex at the paraxial region O, and the image-side surface S10 of the fifth lens element L5 can be convex at the paraxial region O.

In the optical lens 100 provided by the present application, the first lens element L1 has positive refractive power, and plays a role of converging light rays, so that large-angle incident light rays can enter the optical system, and the optical system has a larger field angle, so as to meet the requirement of the optical system on the shooting range; the first lens element L1 is of a biconvex surface type at the optical axis O, so that the positive refractive power of the first lens element L1 can be enhanced, and the total length of the optical system can be shortened; the second lens element L2 with negative refractive power has a convex object-side surface S3 at a paraxial region O of the second lens element L2, and a concave image-side surface S4 at a paraxial region O of the second lens element L2, which is favorable for correcting distortion of the optical lens assembly 100 and improving imaging quality; the third lens element L3 has negative refractive power, and can counteract aberrations such as spherical aberration and coma aberration generated by the first lens element L1 or the second lens element L2; the fourth lens element L4 with negative refractive power has a concave object-side surface S7 near the optical axis O, which is favorable for correcting distortion, astigmatism and curvature of field of incident light beam passing through the lens element, thereby improving the imaging quality; the fifth lens element L5 with positive refractive power is matched with the convex surface of the fifth lens element L5 at the paraxial region O, so as to balance the aberration of the fourth lens element L4, further improve the imaging quality of the optical lens assembly 100, and facilitate further contraction of light, thereby facilitating shortening of the total length of the optical lens assembly 100.

In some embodiments, the optical lens 100 may be applied to electronic devices such as a mobile phone, a tablet, a car recorder, a security monitor, and the like, and the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 may be made of plastic, so that the optical lens 100 has a good optical effect and the optical lens has good portability. In addition, the plastic material is easier to process the lens, so that the processing cost of the optical lens can be reduced.

In some embodiments, the material of the lens in the optical lens 100 may also be 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 used, but the specific configuration relationship may be determined according to practical requirements, and 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 surface S1 of the first lens L1. It is understood that, in other embodiments, the stop 102 may also be disposed between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3, or the stop 102 may also be disposed between the first lens L1 and the second lens L2, and the setting may be adjusted according to practical situations, which is not limited in this embodiment.

In some embodiments, the optical lens 100 further includes a filter L6, such as an infrared band-pass filter, disposed between the image-side surface S10 of the fifth lens element L5 and the image plane 101 of the optical lens 100, where the infrared band-pass filter allows infrared light within a desired wavelength range to pass through, and light with other wavelengths outside the desired wavelength range is filtered and cannot pass through, so as to avoid interference light from affecting normal imaging of the infrared light.

In some embodiments, the optical lens 100 satisfies the following relationship: -6.5 sR10/f < -0.1. Where R10 is a curvature radius of the image-side surface S10 of the fifth lens element L5 at the optical axis O, and f is a focal length of the optical lens system 100. When the above relation is satisfied, the curvature radius of the image-side surface S10 of the fifth lens element L5 at the optical axis O and the focal length of the optical lens 100 can be controlled within a reasonable range, so as to be beneficial to correcting astigmatism, curvature of field and distortion of the optical lens 100, compressing the total optical length of the optical lens 100, and meeting the design requirements of the optical lens 100 for being light, thin and small. Below the lower limit of the above relational expression, the curvature radius of the image-side surface S10 of the fifth lens L5 at the optical axis O is too large, so that the surface shape of the fifth lens L5 is too gentle, and it is difficult to sufficiently correct astigmatism, curvature of field, and distortion of the optical lens 100; if the upper limit of the above relation is exceeded, the curvature radius of the image-side surface S10 of the fifth lens element L5 at the optical axis O is too small, which results in too large a surface curvature of the fifth lens element L5, increasing the sensitivity of the fifth lens element L5, and thus being disadvantageous to the engineering of the fifth lens element L5.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.65< ∑ ET/Σ CT <0.75.Σ ET is a sum of distances in the optical axis O direction from the maximum effective aperture of the object-side surface to the maximum effective aperture of the image-side surface of each of the first lens L1 to the fifth lens L5 (i.e., a sum of thicknesses of edges of the five lenses including the first lens L1 to the fifth lens L5), and Σ CT is a sum of thicknesses of the first lens L1 to the fifth lens L5 on the optical axis O (i.e., a sum of thicknesses of centers of the five lenses including the first lens L1 to the fifth lens L5). Specifically, Σ ET/Σ CT may be 0.655, 0.661, 0.694, 0.701, 0.725, 0.734, or 0.749, etc. When the relation is satisfied, the central thickness sum and the edge thickness sum of the five lenses of the optical lens 100 are favorably controlled within a proper range, so that the optical path difference between the central view field and the edge view field can be balanced, the field curvature is effectively improved, and the distortion is reduced. When Σ ET/Σ CT is greater than or equal to 0.75, the optical path of the edge field of view of the optical lens 100 is greater than the optical path of the central ray, which causes the field curvature of the optical lens 100 to be too large, and causes the image blur of the external field of view; when Σ ET/Σ CT is less than or equal to 0.65, the optical path of the edge field of view of the optical lens 100 is smaller than the optical path of the central ray, which also easily causes the field curvature of the optical lens 100 to be too large, thereby causing the image blur of the external field of view.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.24< (SAG 11+ SAG 21)/TTL <0.3. Wherein, TTL is a distance from the object-side surface S1 of the first lens element L1 to the image plane 101 of the optical lens element 100 on the optical axis O (i.e., a total optical length of the optical lens element 100), SAG11 is a distance from an intersection point of the object-side surface S1 of the first lens element L1 and the optical axis O to a position where a maximum effective radius of the object-side surface S1 of the first lens element L1 is parallel to the optical axis O (i.e., a rise of the object-side surface S1 of the first lens element L1), and SAG21 is a distance from an intersection point of the object-side surface S3 of the second lens element L2 and the optical axis O to a position where a maximum effective radius of the object-side surface S3 of the second lens element L2 is parallel to the optical axis O (i.e., a rise of the object-side surface S3 of the second lens element L2). Specifically, (SAG 11+ SAG 21)/TTL may be 0.241, 0.263, 0.277, 0.284, 0.292, or 0.299, or the like. When the above relational expression is satisfied, it is advantageous to control the structural ratio of the first lens L1 and the second lens L2 in the entire optical lens 100, effectively reduce the total optical length of the optical lens 100, and implement the miniaturization design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 3-Ap AT23/AT12<24. The AT23 is an air gap on the optical axis O between the image-side surface S4 of the second lens element L2 and the object-side surface S5 of the third lens element L3, and the AT12 is an air gap on the optical axis O between the image-side surface S2 of the first lens element L1 and the object-side surface S3 of the second lens element L2. Specifically, AT23/AT12 may be 3.5, 5.6, 7.1, 9.4, 12.5, 16.7, 19.3, 22.6, 23.9, etc. When the above relation is satisfied, it is beneficial to converge the incident light, so that the light can smoothly transit to the image plane 101. When AT23/AT12 is greater than or equal to 24, an air gap on the optical axis O between the image-side surface S2 of the first lens L1 and the object-side surface S3 of the second lens L2 is too small, and an air gap on the optical axis O between the image-side surface S4 of the second lens L2 and the object-side surface S5 of the third lens L3 is too large, which is not favorable for convergence of incident light, and is easy to cause that light is too steep in the space gap and cannot be smoothly transited to the imaging surface 101; when AT23/AT12 is less than or equal to 3, the air gap between the image-side surface S2 of the first lens element L1 and the object-side surface S3 of the second lens element L2 on the optical axis O increases, and a spacer is additionally required to be added, so that the weight and cost of the optical lens 100 increase, which is not favorable for the miniaturization of the optical lens 100, and the assembly difficulty of the optical lens 100 increases, and the air gap between the image-side surface S4 of the second lens element L2 and the object-side surface S5 of the third lens element L3 on the optical axis O is compressed, which is not favorable for smooth transition of light.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.13-straw CT3/AT34<0.2. Wherein, CT3 is the thickness of the third lens element L3 on the optical axis O, and AT34 is the air gap between the image-side surface S6 of the third lens element L3 and the object-side surface S7 of the fourth lens element L4 on the optical axis O. Specifically, AT23/AT12 may be 0.131, 0.145, 0.162, 0.173, 0.186, 0.191, 0.199, or the like. When the above relational expression is satisfied, the thickness of the third lens L3 and the air gap between the third lens L3 and the fourth lens L4 can be reasonably controlled, so that light can smoothly exit from the third lens L3 and enter the fourth lens L4 at a reasonable incident angle, the relative brightness of an external view field is higher, and the difference between the central brightness of the image plane and the brightness of the external view field is smaller. When the CT3/AT34 is greater than or equal to 0.2, the light transition is not smooth enough, and the light is steep, and when the CT3/AT34 is less than or equal to 0.1, the central thickness of the third lens L3 is too thin, which is not beneficial to the production and processing of the third lens L3, and affects the optical resolution of the whole optical lens 100, resulting in the decrease of the imaging definition.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.30 and straw MAX45/MIN45<3.55. Where, MAX45 is the maximum air gap between the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5 in the direction parallel to the optical axis O, and MIN45 is the minimum air gap between the image-side surface S8 of the fourth lens L4 and the object-side surface S9 of the fifth lens L5 in the direction parallel to the optical axis O. Specifically, MAX45/MIN45 may be 1.313, 1.321, 1.405, 1.455, 1.589, 1.762, 2.151, 2.591, 2.816, 3.145, 3.337, 3.510, or 3.549, etc. When the above relational expression is satisfied, the control of the bending degree of the fourth lens L4 and the fifth lens L5 is facilitated, the excessive bending of the lenses is avoided, the local astigmatism can be effectively reduced, the overall sensitivity of the optical lens 100 is reduced, and the engineering manufacturing is facilitated.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.8 and minus TTL/f <0.9, where TTL is a distance from the object-side surface S1 of the first lens element L1 to the image plane 101 of the optical lens system 100 on the optical axis O, and f is a focal length of the optical lens system 100. Specifically, TTL/f can be 0.815, 0.838, 0.857, 0.861, 0.889, or 0.895, and the like. When the above relation is satisfied, the focal length of the optical lens 100 and the total optical length of the optical lens 100 can be reasonably controlled, so that not only can the optical lens 100 be miniaturized, but also light can be better converged on the imaging surface 101. When TTL/f is less than or equal to 0.8, the total optical length of the optical lens 100 is too short relative to the focal length of the optical lens 100, which is easy to increase the sensitivity of the optical lens 100 and is not favorable for the light to converge on the image plane 101. When TTL/f is greater than or equal to 0.9, the total optical length of the optical lens 100 is too long relative to the focal length of the optical lens 100, which results in too large a chief ray angle of the light entering the imaging plane 101, and the marginal light of the optical lens 100 cannot be imaged on the imaging plane 101, which results in incomplete imaging information, reduced imaging quality, and is not favorable for realizing the miniaturized design of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 3.5 are woven fabric f/Σ ET <4.5.Σ ET is a sum of distances in the optical axis O direction from the maximum effective aperture of the object-side surface to the maximum effective aperture of the image-side surface of each of the first lens L1 to the fifth lens L5, and f is a focal length of the optical lens 100. Specifically, the f/Σ ET may be 3.51, 3.60, 3.72, 3.95, 4.05, 4.45, or 4.49, etc. When the optical lens meets the above relational expression, the structural combination of the lens group can be compact, thereby satisfying the miniaturization design of the optical lens, improving the processing technology yield, simultaneously, ensuring that light rays can be well converged and imaged on an imaging surface, and further ensuring good imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.13 and straw BFL/TTL is less than 0.18. BFL is a distance between the image-side surface S10 of the fifth lens element L5 and the image plane 101 of the optical lens system 100 on the optical axis O, i.e. a back focus. Specifically, the BFL/TTL may be 0.131, 0.145, 0.157, 0.162, 0.173, or 0.179, etc. When satisfying above-mentioned relational expression, be favorable to realizing optical lens 100's miniaturized design, guarantee that optical lens 100 has sufficient focusing scope, promote the equipment yield of the module of making a video recording, be favorable to guaranteeing simultaneously that optical lens 100 possesses great depth of focus, can acquire the more degree of depth information of object space. When the BFL/TTL is less than or equal to 0.13, an allowable tolerance range is too small in the assembly process of the camera module, which may result in too low yield of the camera module, increase difficulty in the production process, and may also result in poor imaging quality of the optical lens 100 due to difficulty in ensuring the focal depth of the optical lens 100; when the BFL/TTL is greater than or equal to 0.18, the total optical length of the optical lens 100 is too short, and the optical lens 100 is excessively compressed, which easily causes sensitivity of the optical lens 100 and increases difficulty in process assembly.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.18 and less AT34/TTL <0.3. The AT34 is an air gap on the optical axis O between the image-side surface S6 of the third lens element L3 and the object-side surface S7 of the fourth lens element L4. Specifically, the AT34/TTL can be 0.181, 0.191, 0.205, 0.215, 0.257, or 0.296, etc. When the above relation is satisfied, the assembling sensitivity of the optical lens 100 is reduced, and the assembling yield is improved. When AT34/TTL is more than or equal to 0.3, the assembly sensitivity of the optical lens 100 is increased, and the production yield of the optical lens 100 is reduced; when the AT34/TTL is less than or equal to 0.18, the performance of the optical lens 100 is satisfied, and the optical lens 100 is inevitably too long, which is not favorable for the miniaturization of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.8-straw CT3/CT2<1.5. Wherein, CT3 is the thickness of the third lens element L3 on the optical axis O, and CT2 is the thickness of the second lens element L2 on the optical axis O. Specifically, CT3/CT2 may be 0.82, 0.88, 0.98, 1.10, 1.17, 1.25, 1.36, 1.48, or the like. When the above relational expression is satisfied, it is advantageous to improve the resolving power of the optical lens 100, correct the astigmatism of the optical lens 100, and improve the imaging sharpness of the optical lens 100. When CT3/CT2 is larger than or equal to 1.5, the astigmatism of the optical lens 100 is too large; when CT3/CT2 is less than or equal to 0.8, the resolution of the optical lens 100 is reduced, which affects the imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.2-woven fabric DT12/DT22<1.4. DT12 is the maximum effective half aperture of the image-side surface S2 of the first lens L1, and DT22 is the maximum effective half aperture of the image-side surface S4 of the second lens L2. Specifically, the DT12/DT22 may be 1.211, 1.226, 1.287, 1.337, 1.360, 1.395, etc. When the relation is satisfied, the maximum effective half aperture of the image side surfaces of the first lens L1 and the second lens L2 can be controlled within a reasonable range, so that the angle maximization of incident light is realized by utilizing the large aperture of the first lens L1, and the incident light is folded and converged by utilizing the smaller aperture of the second lens L2.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.1-woven fabric DT22/DT31<1.3. DT22 is the maximum effective half-diameter of the image-side surface S4 of the second lens L2, and DT31 is the maximum effective half-diameter of the object-side surface S5 of the third lens L3. Specifically, DT22/DT31 may be 1.113, 1.172, 1.213, 1.244, 1.267, 1.289, 1.295, or the like. When the above relation is satisfied, the light of the second lens L2 can be favorably converged after entering the second lens L2, and the small aperture of the object-side surface S5 of the third lens L3 is favorable for converging the incident light again, so that the volume of the optical lens 100 is reduced, and the miniaturization of the optical lens 100 is facilitated.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.5< (DL 41+ DL 51)/Imgh <1.7. Here, DL41 is the maximum effective diameter of the object-side surface S7 of the fourth lens L4, DL51 is the maximum effective diameter of the object-side surface S9 of the fifth lens L5, and Imgh is the image height corresponding to the maximum field angle. Specifically, (DL 41+ DL 51)/Imgh may be 1.51, 1.53, 1.57, 1.63, 1.67, 1.69, or the like. When the above relation is satisfied, the light can smoothly transit to the image plane 101 through the fourth lens L4 and the fifth lens L5. When (DL 41+ DL 51)/Imgh is larger than or equal to 1.7, the light rays are too steep when passing through the fourth lens L4 and the fifth lens L5, so that the light rays are difficult to smoothly transit to the imaging surface 101; when (DL 41+ DL 51)/Imgh is less than or equal to 1.5, the light rays smoothly transition to the imaging surface 101 at a large angle after passing through the fourth lens L4 and the fifth lens L5, and cannot be matched with a proper chip, so that imaging information is poor.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.55 were woven so as to have f1/R1<1.80. Wherein R1 is a curvature radius of the object-side surface S1 of the first lens element L1 at the optical axis O, and f1 is a focal length of the first lens element L1. Specifically, f1/R1 may be 1.553, 1.591, 1.620, 1.672, 1.733, 1.765, 1.795, or the like. When the above relation is satisfied, it is beneficial to match the curvature radius of the object-side surface S1 and the curvature radius of the image-side surface S2 of the first lens L1 with the focal length of the first lens L1, so that the optical lens 100 has the characteristic of a large field of view. When f1/R1 is less than or equal to 1.55, the field angle range of the optical lens 100 is too large, and the processing difficulty is increased; when f1/R1 is greater than or equal to 1.80, the focal length of the first lens L1 is not matched with the curvature radius of the object-side surface S1, which causes the imaging performance of the optical lens 100 to be reduced and the astigmatism to be increased.

In some embodiments, the optical lens 100 satisfies the following relationship: -14 sR2/f 1< -3. Wherein, R2 is a curvature radius of the image-side surface S2 of the first lens element L1 at the optical axis O, and f1 is a focal length of the first lens element L1. Specifically, R2/f1 may be-13.9, -13.5, -10.0, -8.7, -6.5, -4.1, -3.5, -3.2, or-3.05, etc. When the above relation is satisfied, the curvature radius of the object-side surface S1 and the curvature radius of the image-side surface S2 of the first lens L1 are adapted to the focal length of the first lens L1, so that the optical lens 100 has a characteristic of a large field of view. When R2/f1 is less than or equal to-14, the field angle range of the optical lens 100 is too large, and the processing difficulty is increased; when R1/f1 is greater than or equal to-3, the focal length of the first lens element L1 does not match the curvature radius of the image side surface S2, which causes the imaging performance of the optical lens 100 to be degraded and the astigmatism amount to be increased.

In some embodiments, the optical lens 100 satisfies the following relationship: -1.6-woven SAG41/CT4< -0.7. SAG41 is a distance in a direction parallel to the optical axis O from an intersection point of the object-side surface S7 of the fourth lens L4 and the optical axis O to a maximum effective radius of the object-side surface S7 of the fourth lens L4 (i.e., a sagittal height of the object-side surface S7 of the fourth lens L4), and CT4 is a thickness of the fourth lens L4 on the optical axis O. Specifically, SAG41/CT4 may be-1.59, -1.43, -1.26, -1.10, -1.03, -0.95, -0.87, -0.79, or-0.71, etc. When satisfying above-mentioned relational expression, can be with fourth lens L4 object side S7 rise and the control of fourth lens L4 center thickness in suitable scope to make the smooth transition of light, be favorable to making outer visual field formation of image relative brightness great, improve the imaging quality, be favorable to fourth lens L4' S machine-shaping simultaneously. When SAG41/CT4 is less than or equal to-1.6, the center thickness of the fourth lens L4 is too thin, and the curvature of the object side surface S7 of the fourth lens L4 is too large, so that the processing and the forming of the fourth lens L4 are not facilitated, and the forming yield is reduced; when SAG41/CT4 is more than or equal to-0.7, the curvature of the object side surface S7 of the fourth lens L4 is too small, light rays are difficult to smoothly transit, and the relative brightness of an external view field is too small, so that the imaging quality is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: -4-straw SAG42/MIN45< -0.4. Here, SAG42 is a distance in a direction parallel to the optical axis O from an intersection point of the image-side surface S8 of the fourth lens L4 and the optical axis O to a maximum effective radius of the image-side surface S8 of the fourth lens L4 (i.e., a rise of the image-side surface S8 of the fourth lens L4), and MIN45 is a minimum air gap in the direction parallel to the optical axis O from the image-side surface S8 of the fourth lens L4 to the object-side surface S9 of the fifth lens L5. Specifically, SAG42/MIN45 may be-3.9, -3.1, -2.6, -2.3, -1.7, -1.1, -0.6, -0.53, -0.49, or-0.42, etc. When the above relational expression is satisfied, the distortion of the external view field of the optical lens 100 is favorably corrected, the imaging quality of the optical lens 100 is improved, and meanwhile, the processing and forming of the fourth lens L4 are favorably performed, and the production yield is improved. When SAG42/MIN45 is less than or equal to-4, the air gap between the fourth lens L4 and the fifth lens L5 is too thin, the space for correcting distortion is limited, and the correction effect is poor; when SAG42/MIN45 is more than or equal to-0.4, the curvature of the image side surface S8 of the fourth lens L4 is not matched with the minimum air gap ratio, distortion correction is not facilitated, and meanwhile light rays are difficult to transition stably, so that the imaging quality of the optical lens 100 is reduced.

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, and a filter L6, which are sequentially disposed along an optical axis O from an object side to an image side.

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 negative refractive power, the fourth lens element L4 has negative refractive power, and the fifth lens element L5 has positive refractive power.

Furthermore, the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex at the paraxial region O; the object-side surface S3 and the image-side surface S4 of the second lens element L2 are respectively convex and concave at the paraxial region O; the object-side surface S5 and the image-side surface S6 of the third lens element L3 are respectively concave and 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 concave at the paraxial region O; the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are convex at the paraxial region O.

Specifically, taking as an example the focal length f =8.66mm of the optical lens 100, the field angle FOV =37.81 ° of the optical lens 100, the total optical length TTL =7.52mm of the optical lens 100, and the f-number FNO =2.49, 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 surface number is the object side surface of the lens, and the surface with the larger surface number is the image side surface of the lens, and for example, the

surface numbers

1 and 2 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 surface of the first lens L1 to the image side surface of the last lens is the positive direction of the optical axis O, when the value is negative, it indicates that the 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, thickness, and focal length in table 1 are all mm. And the reference wavelength of the refractive index, abbe number, focal length of each lens in table 1 was 587.6nm.

TABLE 1

In the first embodiment, the object-side surface and the image-side surface of any one of the first lens L1 to the fourth lens L4 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 distance rise from the vertex of the aspheric surface 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 =1/R (i.e., paraxial curvature c is the inverse of radius R of Y in table 1 above); k is the cone coefficient;Aiis a correction coefficient corresponding to the high-order term of the i-th term of the aspheric surface. Table 2 shows the coefficients A4, A6, A8, a10, a12, a14, a16, a18, and a20 of the high-order terms that can be used for the respective aspherical mirrors S1 to S10 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 435nm, 470nm, 510nm, 587.5615nm, 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 (a) in fig. 2, the spherical aberration of the optical lens 100 in the first embodiment is effectively controlled, which shows that the imaging quality of the optical lens 100 in the present embodiment is better.

Referring to fig. 2 (B), fig. 2 (B) is a graph of astigmatism of the optical lens 100 at a wavelength of 587.5615nm in the first embodiment. 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. In the astigmatism graph, T represents the curvature of the imaging plane 101 in the meridional direction, and S represents the curvature of the imaging plane 101 in the sagittal direction, and it can be seen from (B) in fig. 2 that 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 587.5615 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 the wavelength 587.5615 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, and a filter L6, which are disposed in order from the object side to the image side along an optical axis O.

Further, in the second embodiment, the refractive power of each lens element is the same as that of each lens element in the first embodiment. Meanwhile, in the second embodiment, the face shape of each lens coincides with the face shape of each lens in the first embodiment.

In the second embodiment, the focal length f =8.86mm of the optical lens 100, the field angle FOV =37.89 ° of the optical lens 100, the total optical length TTL =7.68mm of the optical lens 100, and the f-number FNO =2.49 are taken as examples. Other parameters in the second embodiment are given in the following table 3, 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. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 3 was 587.6nm.

TABLE 3

In the second embodiment, table 4 gives the high-order term coefficients that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical mirror 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 graph of (a) the longitudinal spherical aberration, (B) the astigmatism graph and (C) the distortion graph 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, and a filter L6, which are disposed in order from the object side to the image side along an optical axis O.

Further, in the third embodiment, the refractive power of each lens element is the same as that of each lens element in the first embodiment. 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 image-side surface S8 of the fourth lens element L4 is convex at the paraxial region O.

In the third embodiment, the focal length f =8.67mm of the optical lens 100, the field angle FOV =38.09 ° of the optical lens 100, the total optical length TTL =7.48mm of the optical lens 100, and the f-number FNO =2.48 are taken as examples. Other parameters in the third embodiment are shown in the following table 5, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of Y radius, thickness, and focal length in table 5 are mm. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 5 was 587.6nm.

TABLE 5

In the third embodiment, table 6 gives the high-order term coefficients that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical mirror 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

Fig. 7 is a schematic structural diagram of an optical lens 100 according to a fourth embodiment of the present disclosure. The optical lens 100 includes a diaphragm 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, which are arranged in order from the object side to the image side along an optical axis O.

Further, in the fourth embodiment, the refractive power of each lens element is the same as that of each lens element in the first embodiment. In the fourth embodiment, the surface shape of each lens differs from that of the first embodiment in that: the image-side surface S8 of the fourth lens element L4 is convex at the paraxial region O.

In the fourth embodiment, the focal length f =8.67mm of the optical lens 100, the field angle FOV =34.67 ° of the optical lens 100, the total optical length TTL =7.50mm of the optical lens 100, and the f-number FNO =2.48 are taken as examples. Other parameters in the fourth embodiment are given in the following table 7, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 7 was 587.6nm.

TABLE 7

In the fourth embodiment, table 8 gives the high-order term coefficients that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical mirror 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

Fig. 9 is a schematic structural diagram of an optical lens 100 according to a fifth embodiment of the present disclosure. The optical lens 100 includes a diaphragm 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, which are arranged in order from the object side to the image side along an optical axis O.

Further, in the fifth embodiment, the refractive power of each lens element is the same as that of each lens element in the first embodiment. Meanwhile, in the fifth embodiment, the face shape of each lens coincides with the face shape of each lens in the first embodiment.

In the fifth embodiment, the focal length f =8.68mm of the optical lens 100, the field angle FOV =37.69 ° of the optical lens 100, the total optical length TTL =7.50mm of the optical lens 100, and the f-number FNO =2.49 are taken as examples. The other parameters in the fifth embodiment are shown in the following table 9, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 9 are mm. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 9 was 587.6nm.

TABLE 9

In the fifth embodiment, table 10 gives the high-order term coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical mirror 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 graph of (a) the longitudinal spherical aberration, (B) the astigmatism graph and (C) the distortion graph 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), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated here.

Sixth embodiment

Fig. 11 is a schematic structural diagram of an optical lens 100 according to a sixth embodiment of the present application. The optical lens 100 includes a diaphragm 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, which are arranged in order from the object side to the image side along an optical axis O.

Further, in the sixth embodiment, the refractive power of each lens element is the same as that of each lens element in the first embodiment. Meanwhile, in the sixth embodiment, the face shape of each lens coincides with the face shape of each lens in the first embodiment.

In the sixth embodiment, the focal length f =8.67mm of the optical lens 100, the field angle FOV =37.77 ° of the optical lens 100, the total optical length TTL =7.48mm of the optical lens 100, and the f-number FNO =2.47 are taken as examples. Other parameters in the sixth embodiment are given in the following table 11, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 11 are mm. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 11 was 587.6nm.

TABLE 11

In the sixth embodiment, table 12 gives the high-order term coefficients that can be used for each aspherical mirror in the sixth embodiment, wherein each aspherical mirror type can be defined by the formula given in the first embodiment.

TABLE 12

Referring to fig. 12, as can be seen from the graph of (a) the longitudinal spherical aberration, (B) the astigmatism graph and (C) the distortion graph in fig. 12, 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. 12 (a), fig. 12 (B), and fig. 12 (C), reference may be made to the contents described in the first embodiment with respect to fig. 2 (a), fig. 2 (B), and fig. 2 (C), and details thereof are not repeated here.

Seventh embodiment

Fig. 13 is a schematic structural diagram of an optical lens 100 according to a seventh embodiment of the present disclosure. The optical lens 100 includes a diaphragm 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter L6, which are arranged in order from the object side to the image side along an optical axis O.

Further, in the seventh embodiment, the refractive power of each lens element is the same as the refractive power of each lens element in the first embodiment. Meanwhile, in the seventh embodiment, the surface type of each lens is different from that in the first embodiment in that: the object-side surface S5 and the image-side surface S6 of the third lens element L3 are respectively convex and concave at the paraxial region O, and the image-side surface S8 of the fourth lens element L4 is convex at the paraxial region O.

In the seventh embodiment, the focal length f =8.67mm of the optical lens 100, the field angle FOV =38.09 ° of the optical lens 100, the total optical length TTL =7.48mm of the optical lens 100, and the f-number FNO =2.49 are taken as examples. Other parameters in the seventh embodiment are given in the following table 13, and the definitions of the parameters can be obtained from the foregoing description, which is not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 13 are mm. And the reference wavelength of refractive index, abbe number, focal length of each lens in table 13 was 587.6nm.

Watch 13

In the seventh embodiment, table 14 gives the high-order term coefficients that can be used for each aspherical mirror surface in the seventh embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

TABLE 14

Referring to fig. 14, as can be seen from the longitudinal spherical aberration diagram (a), the astigmatism diagram (B) and the distortion diagram (C) in fig. 14, the longitudinal spherical aberration, the astigmatism and the distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 14 (a), fig. 14 (B), and fig. 14 (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.

Please refer to table 15, table 15 summarizes ratios of the relations in the first embodiment to the seventh embodiment of the present application.

Watch 15

Referring to fig. 15, the present application further discloses a camera module 200, 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 camera module having the optical lens 100 can reduce the total optical length of the optical lens 100, realize the light, thin and compact design of the optical lens 100, correct aberrations such as distortion, astigmatism and field curvature of the optical lens 100, and improve the imaging quality of the optical lens 100.

Referring to fig. 16, the present application further discloses an electronic device, wherein 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 apparatus 300 having the camera module 200 also has all the technical effects of the optical lens 100, that is, the optical total length of the optical lens 100 can be reduced, the optical lens 100 can be designed to be light, thin and small, and aberrations such as distortion, astigmatism and field curvature of the optical lens 100 can be corrected, so as to improve the imaging quality 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 system includes five lens elements with refractive power, wherein the five lens elements include, 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 and a fifth lens element;

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

the third lens element with negative refractive power;

the optical lens satisfies the following relation: -6.5 sR10/f < -0.1;

wherein R10 is a curvature radius of an image-side surface of the fifth lens element at the optical axis, and f is a focal length of the optical lens assembly.

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

3-Ap AT23/AT12<24; and/or, 0.13-woven CT3/AT34<0.2; and/or, 0.18 are woven with AT34/TTL <0.3; and/or, 1.30 are woven with MAX45/MIN45<3.55;

wherein, AT12 is an air gap between an image side surface of the first lens element and an object side surface of the second lens element on an optical axis, AT23 is an air gap between an image side surface of the second lens element and an object side surface of the third lens element on the optical axis, AT34 is an air gap between an image side surface of the third lens element and an object side surface of the fourth lens element on the optical axis, CT3 is a thickness of the third lens element on the optical axis, TTL is a distance between an object side surface of the first lens element and an image plane of the optical lens element on the optical axis, MAX45 is a maximum air gap between an image side surface of the fourth lens element and an object side surface of the fifth lens element on a direction parallel to the optical axis, and MIN45 is a minimum air gap between an image side surface of the fourth lens element and an object side surface of the fifth lens element on a direction parallel to the optical axis.

3. An optical lens according to claim 1, characterized in that the optical lens satisfies the following relation:

0.8-plus TTL/f is less than 0.9; and/or, 0.13-straw-woven fabric BFL/TTL is less than 0.18;

wherein, TTL is a distance on the optical axis from the object-side surface of the first lens element to the imaging surface of the optical lens, and BFL is a distance on the optical axis from the image-side surface of the fifth lens element to the imaging surface of the optical lens.

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

0.65< ∑ ET/Σ CT <0.75, and/or, 3.5 is woven of less than f/Σ ET <4.5;

Σ ET is a sum of distances in an optical axis direction from a maximum effective aperture position of an object side surface to a maximum effective aperture position of an image side surface of each of the first to fifth lenses, Σ CT is a sum of thicknesses of the first to fifth lenses in the optical axis direction, and BFL is a distance in the optical axis direction from the image side surface of the fifth lens to an image plane of the optical lens.

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

0.8<CT3/CT2<1.5；

wherein CT2 is the thickness of the second lens element on the optical axis, and CT3 is the thickness of the third lens element on the optical axis.

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

1.2 and is composed of (a) yarn (DT12/DT 22) and less than 1.4; and/or, 1.1-woven DT22/DT31<1.3; and/or, 1.5< (DL 41+ DL 51)/Imgh <1.7;

wherein DT12 is the maximum effective half aperture of the image-side surface of the first lens element, DT22 is the maximum effective half aperture of the image-side surface of the second lens element, and DT31 is the maximum effective half aperture of the object-side surface of the third lens element; DL41 is the maximum effective diameter of the object-side surface of the fourth lens element, DL51 is the maximum effective diameter of the object-side surface of the fifth lens element, and Imgh is the image height corresponding to the maximum field angle.

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

1.55< -f1/R1 <1.80, and/or-14 < -R2/f 1< -3;

wherein R1 is a curvature radius of an object-side surface of the first lens element at the optical axis, R2 is a curvature radius of an image-side surface of the first lens element at the optical axis, and f1 is a focal length of the first lens element.

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

0.24< (SAG 11+ SAG 21)/TTL <0.3, and/or,

-1.6-woven SAG41/CT4< -0.7, and/or,

-4<SAG42/MIN45<-0.4；

SAG11 is a distance from an intersection point of an object side surface of the first lens and the optical axis to a maximum effective radius of an object side surface of the first lens in a direction parallel to the optical axis, SAG21 is a distance from an intersection point of an object side surface of the second lens and the optical axis to a maximum effective radius of an object side surface of the second lens in a direction parallel to the optical axis, SAG41 is a distance from an intersection point of an object side surface of the fourth lens and the optical axis to a maximum effective radius of an object side surface of the fourth lens in a direction parallel to the optical axis, SAG42 is a distance from an intersection point of an image side surface of the fourth lens and the optical axis to a maximum effective radius of an image side surface of the fourth lens in a direction parallel to the optical axis, TTL is a distance from the object side surface of the first lens to the imaging surface of the optical lens in the optical axis, CT4 is a thickness of the fourth lens in the optical axis, and MIN45 is a minimum air gap from the object side surface of the fourth lens to the object side surface of the fifth lens in a direction parallel to the optical axis.

9. A camera module, comprising the optical lens of any one of claims 1 to 8 and a photosensitive chip, wherein the photosensitive 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.