CN115437113A

CN115437113A - Optical lens, camera module and electronic equipment

Info

Publication number: CN115437113A
Application number: CN202211073819.1A
Authority: CN
Inventors: 华露; 杨健
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-06
Anticipated expiration: 2042-09-02

Abstract

The invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises ten lenses with refractive power, the ten lenses are a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens in sequence from an object side to an image side along an optical axis, the first lens and the second lens have positive refractive power, the third lens has negative refractive power, the fourth lens and the fifth lens have positive refractive power, the sixth lens has negative refractive power, the eighth lens has positive refractive power, and the tenth lens has negative refractive power. 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 high definition imaging requirements of people on the optical lens 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 provides an optical lens assembly having ten lens elements with refractive power, the ten lens elements including, 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, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element:

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

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

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

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

the seventh lens element with refractive power;

the eighth 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 ninth 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 tenth 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 optical lens satisfies the following relation: 1.54 plus TTL/Imgh <1.59;

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 (i.e. a total optical length of the optical lens), and Imgh is a radius of a maximum effective imaging circle of the optical lens (i.e. a half-image height of the optical lens).

In the optical lens provided by the present application, the positive refractive power provided by the first lens element and the convex-concave surface design of the object-side surface and the image-side surface at the paraxial region are favorable for ensuring that the first lens element has sufficient light converging capability, and the positive refractive power of the second lens element and the convex-concave surface design of the object-side surface and the image-side surface at the paraxial region are matched to assist the first lens element in converging light, so as to be favorable for correcting partial aberration generated by the first lens element; the third lens element with negative refractive power and the fourth lens element with positive refractive power are matched, and the opposite refractive powers of the third lens element and the fourth lens element can mutually counteract partial aberration generated by each other, so that the third lens element and the fourth lens element contribute less aberration percentage in the optical lens, and meanwhile, the surface type design of the third lens element and the surface type design of the fourth lens element are that the object side surface is a convex surface at a paraxial region and the image side surface is a concave surface at the paraxial region, so that the shape difference of the third lens element and the fourth lens element can be reduced, and the matching performance and the yield of the optical lens assembly can be improved; the fifth lens with positive refractive power and the sixth lens with negative refractive power can mutually balance the aberration generated by each other, the tolerance sensitivity of the optical lens can be reduced, and the imaging quality of the optical lens is improved; the positive refractive power and the convex-concave design provided by the eighth lens element can reduce the refractive power burden and the aberration correction burden of the object-side lens element, can finally balance the aberration which is difficult to correct and is brought by each lens element on the object side when converging incident light, and can be matched with the object-side lens element to further converge the incident light so as to compress the total length of the optical lens; the ninth lens element has refractive power, the tenth lens element has negative refractive power, and the object-side surfaces of the ninth lens element and the tenth lens element are convex at the paraxial region, and the image-side surfaces are concave at the paraxial region, and the ninth lens element and the tenth lens element cooperate with each other, thereby not only facilitating correction of aberrations generated by the first lens element to the eighth lens element, ensuring balance of aberrations of the optical lens, facilitating transition of marginal field light rays from smaller deflection angles to gentle imaging surfaces, so that higher relative brightness can be obtained at the edges of image surfaces, avoiding dark corners, improving imaging quality, facilitating realization of the characteristics of large image surfaces of the optical lens, and matching with a photosensitive chip with higher pixels.

Further, by making the optical lens satisfy the following relational expression: 1.54< -TTL/Imgh <1.59, so that the structure of the optical lens is more compact, the total optical length of the optical lens is reduced, the assembly sensitivity of the optical lens is ensured to be in a balanced state, the optical lens is further favorably provided with the characteristic of a large image plane, and the optical lens is matched with a photosensitive chip with higher pixels so as to shoot more details of an object.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.35<f/EPD <1.5. Wherein f is the focal length of the optical lens, and EPD is the entrance pupil diameter of the optical lens. When satisfying above-mentioned conditional expression, can make optical lens have great aperture, higher light flux, and then improve the imaging effect of optical lens during operation under the dark surrounds, in addition, still be favorable to reducing the aberration of marginal visual field, guarantee that marginal visual field has sufficient relative luminance, avoid appearing the vignetting.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 7.5 °/mm < HFOV/f <8 °/mm. Wherein f is the focal length of the optical lens, and the HFOV is half of the maximum field angle of the optical lens. The ratio of the maximum field angle of the optical lens to the focal length of the optical lens is controlled within a reasonable range, so that the optical lens obtains a larger field angle under a certain focal length, the optical lens has a good telephoto imaging function, the shooting range of the optical lens on a remote object is enlarged, and a clearer shooting effect is presented. When the angle of view of the optical lens exceeds the upper limit of the relational expression, the distortion of an off-axis field of view is too large, the distortion phenomenon of the periphery of an image is caused, and the imaging performance of the optical lens is reduced; when the distance is less than the lower limit of the above relational expression, the focal length of the optical lens is too long, which is not favorable for miniaturization of the optical lens, and the field angle is too small, which is not favorable for satisfying the field angle range of the optical lens, and sufficient object space information cannot be obtained, which affects the shooting quality 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: f1234/f is more than or equal to 1.3 and less than 1.35. Where f is a focal length of the optical lens, and f1234 is a combined focal length of the first lens group including the first lens, the second lens, the third lens, and the fourth lens. When the conditional expressions are satisfied, the contribution of the refractive power of the first lens group to the fourth lens group is favorably and reasonably distributed, the light deflection angle is reduced, the sensitivity of the optical lens is reduced, meanwhile, the refractive power of the first lens group is enough, light can be effectively deflected, the total length of the first lens group is favorably shortened, and the miniaturization characteristic of the optical lens is realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -1.6 and woven fabric f56/f78910< -0.8. Where f56 is a combined focal length of the second lens group including the fifth lens and the sixth lens, and f78910 is a combined focal length of the third lens group including the seventh lens, the eighth lens, the ninth lens, and the tenth lens. When the conditional expressions are met, the refractive power of the optical lens can be distributed to the lenses of the second lens group and the third lens group in a balanced manner, the whole aberration of the optical lens can be balanced, and good imaging quality can be guaranteed.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.2< (r 22-r 21)/f 2<2.1. Wherein r22 is a curvature radius of an image side surface of the second lens element at the optical axis, r21 is a curvature radius of an object side surface of the second lens element at the optical axis, and f2 is a focal length of the second lens element. When the condition is satisfied, the second lens is favorable for providing proper positive focal power for the optical lens, so that the second lens obtains enough light converging capability, stray light generated by the first lens is favorably eliminated, chromatic aberration is corrected, the balance of various aberrations of the optical lens is promoted, and good imaging quality is obtained.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -4.5 sNt r51/r52< -1. R51 is a curvature radius of an object-side surface of the fifth lens element at the optical axis, and r52 is a curvature radius of an image-side surface of the fifth lens element at the optical axis. When the condition formula is met, the surface shape of the fifth lens can be reasonably controlled, the contribution of the astigmatism amount of the fifth lens can be effectively controlled, the imaging quality of a middle field of view is guaranteed, the aberration of the optical lens is favorably corrected, the distortion amount of the optical lens is balanced, meanwhile, the excessive bending of the surface shape of the object side surface and the image side surface of the fifth lens at the optical axis is avoided, the processing difficulty of the fifth lens is favorably reduced, and the yield of the fifth lens is improved.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.88< (ct 1+ ct2+ ct3+ ct 4)/ct 14<0.95. Wherein, ct1 is first lens in the epaxial thickness of optical axis, ct2 is the second lens in the epaxial thickness of optical axis, ct3 is the third lens in the epaxial thickness of optical axis, ct4 is the fourth lens in the epaxial thickness of optical axis, ct14 is the object side of first lens with the crossing of optical axis extremely the image side of fourth lens with the distance of the crossing of optical axis. When the condition formula is met, the optical lens has enough air gap ratio, the stability and good imaging quality of the optical lens are guaranteed, meanwhile, the total length of the optical lens is shortened, the assembling difficulty is reduced, and the assembling stability is improved.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.6< -sag102/sag 71<2.1. Wherein sag102 is a distance in a direction parallel to the optical axis (i.e., a sagittal height of the image-side surface of the tenth lens) from an intersection point of the image-side surface of the tenth lens and the optical axis to a maximum effective radius of the image-side surface of the tenth lens, and sag71 is a distance in the direction parallel to the optical axis (i.e., a sagittal height of the object-side surface of the seventh lens) from an intersection point of the object-side surface of the seventh lens and the optical axis to a maximum effective radius of the object-side surface of the seventh lens. When the conditional expressions are satisfied, the surface types of the object side and the image side of the third lens group are reasonably controlled, so that light rays can be effectively deflected, the total length of the optical lens is favorably shortened, aberration generated by the first lens group and the second lens group (namely the first lens to the sixth lens) is corrected, the optical lens is favorably matched with a photosensitive chip with higher pixels, and the imaging quality is improved. When the height of the image-side surface of the tenth lens element exceeds the upper limit of the above relational expression, the rise of the image-side surface of the tenth lens element becomes too large, and the surface curvature of the tenth lens element becomes too large, which is disadvantageous to the molding assembly stability of the tenth lens element; when the optical aberration of the third lens group is less than the lower limit of the above relation, the surface shape of the tenth lens is too gentle, and the optical aberration is not enough, which is not favorable for the third lens group to correct the optical aberration generated by the first lens group and the second lens group, and the imaging quality is reduced.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.7< | (sag 92-sag 91)/(sag 82-sag 81) | <1.2. Wherein sag92 is a distance in a direction parallel to the optical axis from an intersection point of the image-side surface of the ninth lens and the optical axis to a maximum effective radius of the image-side surface of the ninth lens (i.e., a rise of the image-side surface of the ninth lens), sag91 is a distance in a direction parallel to the optical axis from an intersection point of the object-side surface of the ninth lens and the optical axis to a maximum effective radius of the object-side surface of the ninth lens (i.e., a rise of the object-side surface of the ninth lens), sag82 is a distance in a direction parallel to the optical axis from an intersection point of the image-side surface of the eighth lens and the optical axis to a maximum effective radius of the image-side surface of the eighth lens (i.e., a rise of the image-side surface of the eighth lens), and sag81 is a distance in a direction parallel to the optical axis from an intersection point of the object-side surface of the eighth lens and the maximum effective radius of the object-side surface of the eighth lens (i.e., a rise of the object-side surface of the eighth lens). When the relation is satisfied, the surface shapes of the ninth lens and the eighth lens are favorably restrained, and the surface shapes are matched with the first lens group and the second lens group, so that the marginal field light rays are ensured to have smaller deflection angles, the relative brightness of the marginal field of the optical lens is improved, meanwhile, the ninth lens is prevented from being excessively bent, and the machinability of the ninth lens is improved. When the curvature degree of the object-side surface and the image-side surface of the eighth lens element is lower than the lower limit of the relational expression, the curvature degree difference between the object-side surface and the image-side surface of the eighth lens element is too large, which is not beneficial to correcting aberrations such as field curvature spherical aberration of the optical lens, and good imaging quality cannot be ensured; if the height exceeds the upper limit of the above relational expression, the difference in rise between the object-side surface and the image-side surface of the ninth lens is too large, and the sensitivity increases, which is disadvantageous to the machine molding of the ninth lens.

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 miniaturized 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 ten lenses, the refractive power and the surface shape of each lens are designed, the imaging quality of the optical lens is improved, and the optical lens satisfies the following relational expression while the total length of the optical lens is controlled: 1.54 ttl/Imgh is less than 1.59, so that the structure of the optical lens is further more compact, the optical total length of the optical lens is reduced, the assembly sensitivity of the optical lens is ensured to be in a balanced state, and the optical lens is further favorable for having the characteristic of a large image plane and matching with a photosensitive chip with higher pixels so as to shoot more details of an object.

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 orientations or positional relationships based on the orientations or positional relationships 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 according to specific situations by those of ordinary skill in the art.

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 disclosure, in the present disclosure, the optical lens 100 includes ten lens elements with refractive power, and the ten lens elements include, in order from an object side to an image side along an optical axis O, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9 and a tenth lens element L10. 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, the seventh lens L7, the eighth lens L8, the ninth lens L9, and the tenth lens L10 in sequence from the object side of the first lens L1, and finally forms an image 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 positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with positive refractive power, the sixth lens element L6 with negative refractive power, the seventh lens element L7 with refractive power (e.g., positive refractive power or negative refractive power), the eighth lens element L8 with positive refractive power, the ninth lens element L9 with refractive power (e.g., positive refractive power or negative refractive power), and the tenth lens element L10 with negative refractive power.

Further, the object-side surface S1 of the first lens element L1 can be convex at the paraxial region O, the image-side surface S2 of the first lens element L1 can be concave 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 at the paraxial region O, the image-side surface S6 of the third lens element L3 can be concave at the paraxial region O, the object-side surface S7 of the fourth lens element L4 can be convex at the paraxial region O, the image-side surface S8 of the fourth lens element L4 can be 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, the object-side surface S11 of the sixth lens element L6 can be concave at the paraxial region O, the image-side surface S12 of the sixth lens element L6 can be convex or concave at the paraxial region O, the object-side surface S13 of the seventh lens element L7 can be convex or concave at the paraxial region O, the image-side surface S14 of the seventh lens element L7 can be convex or concave at the paraxial region O, the object-side surface S15 of the eighth lens element L8 can be convex at the paraxial region O, the image-side surface S16 of the eighth lens element L8 can be concave at the paraxial region O, the object-side surface S17 of the ninth lens element L9 can be convex at the paraxial region O, the image-side surface S18 of the ninth lens element L9 can be concave at the paraxial region O, the object-side surface S19 of the tenth lens element L10 can be convex at the paraxial region O, and the image-side surface S20 of the tenth lens element L10 can be concave at the paraxial region O.

In the optical lens system 100 provided by the present application, the positive refractive power provided by the first lens element L1 and the convex-concave surface design of the object-side surface S1 and the image-side surface S2 at the paraxial region O are favorable for ensuring that the first lens element L1 has sufficient light converging capability, and the positive refractive power of the second lens element L2 and the convex-concave surface design of the object-side surface S3 and the image-side surface S4 at the paraxial region O are matched to assist the first lens element L1 to converge light, which is favorable for correcting partial aberration generated by the first lens element L1; in cooperation with the third lens element L3 with negative refractive power and the fourth lens element L4 with positive refractive power, the opposite refractive powers of the third lens element L3 and the fourth lens element L4 can mutually cancel out some aberrations generated by each other, so that the third lens element L3 and the fourth lens element L4 contribute less aberration percentage in the optical lens 100, and meanwhile, the surface shapes of the third lens element L3 and the fourth lens element L4 are designed such that the object-side surface is convex at the paraxial region O and the image-side surface is concave at the paraxial region O, so as to reduce the shape difference between the third lens element L3 and the fourth lens element L4, thereby improving the assembly compatibility and the yield of the optical lens 100; the object-side surface S11 of the fifth lens element L5, which is biconvex and the object-side surface S11 of the sixth lens element L6, is concave at the paraxial region O, and with the seventh lens element L7 having refractive power, the deflection angle of incident light can be properly increased, and the imaging circle of the optical lens 100 can be enlarged, so that the imaging quality of the optical lens 100 can be improved, and the path of the optical lens 100 projected in the optical axis direction can be shortened, so as to control the overall length of the optical lens 100, thereby facilitating the miniaturization design of the optical lens 100; the positive refractive power and the convex-concave design provided by the eighth lens element L8 can reduce the refractive power burden and the aberration correction burden of the object-side lens element, and can finally balance the aberration that is difficult to correct when each of the object-side lens elements converge the incident light, and can further converge the incident light by cooperating with the object-side lens element, so as to compress the total length of the optical lens element 100; the ninth lens element L9 has refractive power, the tenth lens element L10 has negative refractive power, and the object-side surfaces of the ninth lens element L9 and the tenth lens element L10 are both convex at the paraxial region and the image-side surface S20 is concave at the paraxial region O, the ninth lens element L9 and the tenth lens element L10 cooperate with each other, which is not only favorable for correcting the aberrations generated by the first lens element L1 to the eighth lens element L8, ensuring the aberration balance of the optical lens assembly 100, and being favorable for the gentle transition of the marginal field-of-view light to the imaging plane 101 with a smaller deflection angle, so that the image plane edge can also obtain higher relative brightness, avoiding a dark angle, improving the imaging quality, but also being favorable for realizing the characteristics of the large image plane of the optical lens assembly 100, so as to match the photosensitive chip of a higher pixel.

In some embodiments, the optical lens 100 may be applied to electronic devices such as a smart phone and a smart tablet, 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, the seventh lens L7, the eighth lens L8, the ninth lens L9, and the tenth lens L10 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, 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 surface 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 setting 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 L11, such as an infrared filter, disposed between the image side surface S20 of the tenth lens element L10 and the image plane 101 of the optical lens 100, so as to filter out light in other wavelength bands, such as visible light, and only allow infrared light to pass through, so that the optical lens 100 can be used as an infrared optical lens, that is, the optical lens 100 can also 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: 1.54 were woven ttl/Imgh <1.59. 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 system 100 on the optical axis O (i.e., a total optical length of the optical lens system 100), and Imgh is a radius of a maximum effective imaging circle of the optical lens system 100 (i.e., a half-image height of the optical lens system 100). Specifically, TTL/Imgh can be 1.541, 1.544, 1.56, 1.576, 1.589, or the like. By controlling the ratio of the total length to the half-image height of the optical lens 100 within a reasonable range, the structure of the optical lens 100 is more compact, the optical total length of the optical lens 100 is reduced, the assembly sensitivity of the optical lens 100 is ensured to be in a balanced state, and the optical lens 100 has the characteristic of a large image plane and is matched with a photosensitive chip with higher pixels so as to shoot more details of an object.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.35<f/EPD <1.5. Where f is the focal length of the optical lens 100, and EPD is the entrance pupil diameter of the optical lens 100. Specifically, the f/EPD may be 1.355, 1.405, 1.450, 1.490, 1.499, etc. When satisfying above-mentioned conditional expression, can make optical lens 100 have great aperture, higher light flux, and then improve the imaging effect of optical lens 100 during operation under the dark surrounds, in addition, still be favorable to reducing the aberration of marginal visual field, guarantee that marginal visual field has sufficient relative luminance, avoid appearing the vignetting.

In some embodiments, the optical lens 100 satisfies the following relationship: 7.5 °/mm < HFOV/f <8 °/mm. Where f is a focal length of the optical lens 100, and the HFOV is a half of a maximum field angle of the optical lens 100. Specifically, HFOV/f may be 7.550 °/mm, 7.805 °/mm, 7.950 °/mm, 7.99 °/mm, or the like. By controlling the ratio of the maximum field angle of the optical lens 100 to the focal length of the optical lens 100 within a reasonable range, the optical lens 100 obtains a larger field angle at a certain focal length, so that the optical lens 100 has a good telephoto imaging function, thereby increasing the image pickup range of the optical lens 100 for a distant object and presenting a clearer shooting effect. When the upper limit of the above relation is exceeded, the field angle of the optical lens 100 is too large, which causes too large distortion of the off-axis field, resulting in distortion at the periphery of the image and reducing the imaging performance of the optical lens 100; if the distance is less than the lower limit of the above relational expression, the focal length of the optical lens 100 is too long, which is not favorable for miniaturization of the optical lens 100, and the field angle is too small, which is not favorable for satisfying the field angle range of the optical lens 100, and thus sufficient object space information cannot be obtained, which affects the shooting quality of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: f1234/f is more than or equal to 1.3 and less than 1.35. Where f is a focal length of the optical lens 100, and f1234 is a combined focal length of the first lens group including the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4. Specifically, f1234/f may be 1.30, 1.320, 1.340, 1.349, or the like. When the above conditional expressions are satisfied, it is beneficial to reasonably distribute the contribution amounts of the refractive powers of the first lens element L1 to the fourth lens element L4, reduce the light deflection angle, and reduce the sensitivity of the optical lens 100, and at the same time, it is beneficial to make the refractive power strength of the first lens element sufficient, so that the light can be effectively deflected, which is beneficial to shorten the total length of the first lens element, and to realize the miniaturization of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -1.6 and woven fabric f56/f78910< -0.8. Where f56 is a combined focal length of the second lens group including the fifth lens L5 and the sixth lens L6, and f78910 is a combined focal length of the third lens group including the seventh lens L7, the eighth lens L8, the ninth lens L9, and the tenth lens L10. Specifically, f56/f78910 can be-0.850, -1.00, -1.35, -1.55, or-1.599, etc. When the above conditional expressions are satisfied, it is beneficial to distribute the refractive power of the optical lens 100 to the lenses of the second lens group and the third lens group in a balanced manner, so as to balance the overall aberration of the optical lens 100 and ensure good imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.2< (r 22-r 21)/f 2<2.1. Wherein r22 is a curvature radius of the image-side surface S4 of the second lens element L2 at the optical axis O, r21 is a curvature radius of the object-side surface S3 of the second lens element L2 at the optical axis O, and f2 is a focal length of the second lens element L2. Specifically, (r 22-r 21)/f 2 may be 0.25, 0.8, 1.0, 1.5, 1.8, 2.05, 2.09, or the like. When the above conditional expressions are satisfied, the second lens L2 is favorable for providing a proper positive focal power for the optical lens 100, so that the second lens L2 obtains a sufficient light converging capability, and is favorable for eliminating stray light generated by the first lens L1, correcting chromatic aberration, and promoting the balance of various aberrations of the optical lens 100, so as to obtain good imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship: 4.5< -r 51/r52< -1. R51 is a curvature radius of the object-side surface S9 of the fifth lens element L5 on the optical axis O, and r52 is a curvature radius of the image-side surface S10 of the fifth lens element L5 on the optical axis O. Specifically, r51/r52 may be-4.4, -4.3, -3.5, -2.5, -1.5, -1.2, or-1.18, etc. When the condition is satisfied, the surface shape of the fifth lens L5 can be reasonably controlled, the contribution of the astigmatism amount of the fifth lens L5 can be effectively controlled, so that the imaging quality of the middle field of view is ensured, the aberration of the optical lens 100 is favorably corrected, the distortion amount of the optical lens 100 is balanced, meanwhile, the excessive bending of the surface shape of the object side surface S9 and the image side surface S10 of the fifth lens L5 at the optical axis O is avoided, the processing difficulty of the fifth lens L5 is favorably reduced, and the yield of the fifth lens L5 is improved.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.88< (ct 1+ ct2+ ct3+ ct 4)/ct 14<0.95. Wherein ct1 is the first lens L1 in the thickness on the optical axis O, ct2 is the second lens L2 in the thickness on the optical axis O, ct3 is the third lens L3 in the thickness on the optical axis O, ct4 is the fourth lens L4 in the thickness on the optical axis O, and ct14 is a distance from an intersection point of the object side surface S1 of the first lens L1 with the optical axis O to an intersection point of the image side surface S8 of the fourth lens L4 with the optical axis O. Specifically, (ct 1+ ct2+ ct3+ ct 4)/ct 14 may be 0.89, 0.90, 0.91, 0.93, 0.94, or the like. When the above conditional expressions are satisfied, it is favorable to making optical lens 100 have sufficient air gap ratio, guarantee optical lens 100's stability and good imaging quality, be favorable to shortening optical lens 100's overall length simultaneously, reduce the equipment degree of difficulty, improve the assembly stability.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.6 straw sag102/sag71<2.1. Where sag102 is a distance in the direction parallel to the optical axis (i.e., the rise of the sagittal height of the image-side surface S20 of the tenth lens L10) from the intersection of the image-side surface S20 of the tenth lens L10 and the optical axis O to the maximum effective radius of the image-side surface S20 of the tenth lens L10, and sag71 is a distance in the direction parallel to the optical axis (i.e., the rise of the sagittal height of the object-side surface S13 of the seventh lens L7) from the intersection of the object-side surface S13 of the seventh lens L7 and the optical axis O to the maximum effective radius of the object-side surface S13 of the seventh lens L7. Specifically, sag102/sag71 can be 1.65, 1.70, 1.80, 1.95, 2.0, or 2.05, and the like. When the above conditional expressions are satisfied, the surface shapes of the object side and the image side of the third lens group are reasonably controlled, so that light can be effectively deflected, the total length of the optical lens 100 can be favorably shortened, aberrations generated by the first lens group and the second lens group (i.e., the first lens L1 to the sixth lens L6) can be corrected, the optical lens 100 can be favorably matched with a photosensitive chip with higher pixels, and the imaging quality can be improved. When the upper limit of the above relational expression is exceeded, the rise of the image-side surface S20 of the tenth lens L10 is too large, and the surface curvature of the tenth lens L10 is too large, which is disadvantageous in the molding assembly stability of the tenth lens L10; when the optical power is lower than the lower limit of the above relation, the surface shape of the tenth lens L10 is too gentle, and the deflection of light is insufficient, which is not favorable for the third lens group to correct the aberration generated by the first lens group and the second lens group, and thus the imaging quality is reduced.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.7< | (sag 92-sag 91)/(sag 82-sag 81) | <1.2. Where sag92 is a distance in a direction parallel to the optical axis (i.e., a sagittal height of the image-side surface S18 of the ninth lens L9) from an intersection of the image-side surface S18 of the ninth lens L9 and the optical axis O to a maximum effective radius of the image-side surface S18 of the ninth lens L9, sag91 is a distance in a direction parallel to the optical axis (i.e., a sagittal height of the object-side surface S17 of the ninth lens L9) from an intersection of the object-side surface S17 of the ninth lens L9 and the optical axis O to a maximum effective radius of the object-side surface S17 of the ninth lens L9, sag82 is a distance in a direction parallel to the optical axis (i.e., a sagittal height of the image-side surface S16 of the eighth lens L8) from an intersection of the image-side surface S16 of the eighth lens L8 and the optical axis O to a maximum effective radius of the image-side surface S16 of the eighth lens L8 (i.e., a sagittal height of the image-side surface S16 of the eighth lens L8), and sag81 is a distance in a direction parallel to a maximum effective radius of the object-side surface S15 of the eighth lens L8 (i.e., a sagittal distance in a direction parallel to an optical axis L8). Specifically, | (sag 92-sag 91)/(sag 82-sag 81) | may be 0.71, 0.75, 0.8, 0.95, 1.0, 1.1, 1.15, 1.19, or the like. When the relation is satisfied, the surface shapes of the ninth lens L9 and the eighth lens L8 are favorably constrained, and the surface shapes are matched with the first lens group and the second lens group, so that the marginal field light rays are ensured to have smaller deflection angles, the relative brightness of the marginal field of the optical lens 100 is improved, meanwhile, the ninth lens L9 is prevented from being bent too much, and the machinability of the ninth lens L9 is improved. When the value is lower than the lower limit of the above relational expression, the difference between the curvature degrees of the object-side surface S15 and the image-side surface S16 of the eighth lens element L8 is too large, which is not favorable for correcting aberrations such as field curvature spherical aberration of the optical lens 100, and thus cannot ensure good imaging quality; if the upper limit of the above relational expression is exceeded, the difference in rise between the object-side surface S17 and the image-side surface S18 of the ninth lens L9 becomes too large, sensitivity increases, and it is disadvantageous in the process-molding of the ninth lens L9.

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

First embodiment

As shown in fig. 1, a schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application includes ten lens elements with refractive power, where the ten lens elements include, in order from an object side to an image side along an optical axis O, an aperture stop 102, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9, a tenth lens element L10, and a filter L11. For 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, the seventh lens element L7, the eighth lens element L8, the ninth lens element L9 and the tenth lens element L10, reference is made to the above-mentioned detailed description, and details thereof are omitted herein.

Further, the first lens element L1 with positive refractive power, the second lens element L2 with positive refractive power, the third lens element L3 with negative refractive power, the fourth lens element L4 with positive refractive power, the fifth lens element L5 with positive refractive power, the sixth lens element L6 with negative refractive power, the seventh lens element L7 with negative refractive power, the eighth lens element L8 with positive refractive power, the ninth lens element L9 with positive refractive power and the tenth lens element L10 with negative refractive power.

Furthermore, the object-side surface S1 and the image-side surface S2 of the first lens element L1 are respectively convex and concave 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 convex and concave at the paraxial region O; 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; the object-side surface S9 and the image-side surface S10 of the fifth lens element L5 are convex at the paraxial region O; the object-side surface S11 and the image-side surface S12 of the sixth lens element L6 are both concave at the paraxial region O; the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are respectively concave and convex at the paraxial region O, and the object-side surface S15 and the image-side surface S16 of the eighth lens element L8 are respectively convex and concave at the paraxial region O; the object-side surface S17 and the image-side surface S18 of the ninth lens element L9 are respectively convex and concave at the paraxial region O; the object-side surface S19 and the image-side surface S20 of the tenth lens element L10 are respectively convex and concave at the paraxial region O.

Specifically, taking as an example that the focal length f =4.939mm of the optical lens 100, the maximum field angle FOV =75.847 ° of the optical lens 100, the total optical length TTL =6.16mm of the optical lens 100, and the f-number FNO =1.49, 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 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 or image side of the corresponding face number at the paraxial region O. The first value in the "thickness" parameter column of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side 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, 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 555nm.

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 tenth lens L10 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 =1/R (i.e., paraxial curvature c is the reciprocal of the Y radius R 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 coefficients A4, A6, A8, a10, a12, a14, a16, a18, and a20 of high-order terms that can be used for the respective aspherical lenses S1 to S20 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 430nm, 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 555nm. 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 555nm. 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 555nm.

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 system 100 has ten lenses with refractive power, and the ten lenses include, in order from an object side to an image side along an optical axis O, a stop 102, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9, a tenth lens element L10, and a filter L11. For 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, the seventh lens element L7, the eighth lens element L8, the ninth lens element L9 and the tenth lens element L10, reference may be made to the above-mentioned specific embodiments, and details thereof are omitted herein.

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 seventh lens element L7 with positive refractive power and the ninth lens element L9 with 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 image-side surface S12 of the sixth lens element L6 is convex at the paraxial region O.

The second embodiment exemplifies that the focal length f =4.928mm of the optical lens 100, the maximum field angle FOV =75.744 ° of the optical lens 100, the total optical length TTL =6.16mm of the optical lens 100, and the f-number FNO = 1.49. 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 mm. And the reference wavelength of refractive index, abbe number of each lens in table 3 is 587.6nm, and the reference wavelength of focal length is 555nm.

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 system 100 includes ten lenses having refractive power, and the ten lenses include, in order from an object side to an image side along an optical axis O, an aperture stop 102, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9, a tenth lens element L10, and a filter L11. For 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, the seventh lens element L7, the eighth lens element L8, the ninth lens element L9 and the tenth lens element L10, reference is made to the above-mentioned detailed description, and details thereof are omitted herein.

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 face shape of each lens coincides with the face shape of each lens in the first embodiment.

The third embodiment exemplifies that the focal length f =4.885m of the optical lens 100, the maximum field angle FOV =76.314 ° of the optical lens 100, the total optical length TTL =6.218mm of the optical lens 100, and the f-number FNO = 1.41. 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 555nm.

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), 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.

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 system 100 includes ten lenses having refractive power, and the ten lenses include, in order from an object side to an image side along an optical axis O, an aperture stop 102, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9, a tenth lens element L10, and a filter L11. For 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, the seventh lens element L7, the eighth lens element L8, the ninth lens element L9 and the tenth lens element L10, reference may be made to the above-mentioned specific embodiments, and details thereof are omitted herein.

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 S12 of the sixth lens element L6 is convex at the paraxial region O, and the image-side surface S14 of the seventh lens element L7 is concave at the paraxial region O.

The fourth embodiment exemplifies that the focal length f =4.833mm of the optical lens 100, the maximum field angle FOV =76.938 ° of the optical lens 100, the total optical length TTL =6.1mm of the optical lens 100, and the f-number FNO = 1.44. 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 555nm.

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 (a) the longitudinal spherical aberration diagram, (B) the astigmatism diagram and (C) the distortion diagram 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), 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.

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 system 100 has ten lenses with refractive power, and the ten lenses include, in order from an object side to an image side along an optical axis O, a stop 102, a first lens element L1, a second lens element L2, a third lens element L3, a fourth lens element L4, a fifth lens element L5, a sixth lens element L6, a seventh lens element L7, an eighth lens element L8, a ninth lens element L9, a tenth lens element L10, and a filter L11. For 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, the seventh lens element L7, the eighth lens element L8, the ninth lens element L9 and the tenth lens element L10, reference is made to the above-mentioned detailed description, and details thereof are omitted herein.

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. In the fifth embodiment, however, the surface shape of each lens differs from that of the first embodiment in that: the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are respectively convex and concave.

The fifth embodiment exemplifies that the focal length f =4.943mm of the optical lens 100, the maximum field angle FOV =75.683 ° of the optical lens 100, the total optical length TTL =6.278mm of the optical lens 100, and the f-number FNO = 1.38. 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 555nm.

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 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), 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 achieving a 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 system includes ten lens elements with refractive power, wherein the ten 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, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element, a ninth lens element and a tenth lens element:

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 fourth 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 refractive power;

the tenth 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 optical lens satisfies the following relation:

1.54<TTL/Imgh<1.59；

wherein TTL is a distance on the optical axis from an object-side surface of the first lens element to an imaging surface of the optical lens, and Imgh is a radius of a maximum effective imaging circle of the optical lens.

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

1.35 plus f/EPD <1.5, and/or, 7.5 °/mm < HFOV/f <8 °/mm;

wherein f is the focal length of the optical lens, EPD is the entrance pupil diameter of the optical lens, and HFOV is half of the maximum field angle of the optical lens.

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

1.3 ≤ f1234/f <1.35, and/or-1.6 straw f56/f78910< -0.8;

wherein f is a focal length of the optical lens, f1234 is a combined focal length of the first lens to the fourth lens, f56 is a combined focal length of the fifth lens and the sixth lens, and f78910 is a combined focal length of the seventh lens to the tenth lens.

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

0.2<(r22-r21)/f2<2.1；

wherein r22 is a curvature radius of an image side surface of the second lens element at the optical axis, r21 is a curvature radius of an object side surface of the second lens element at the optical axis, and f2 is a focal length of the second lens element.

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

-4.5<r51/r52<-1；

r51 is a curvature radius of an object-side surface of the fifth lens element at the optical axis, and r52 is a curvature radius of an image-side surface of the fifth lens element at the optical axis.

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

0.88<(ct1+ct2+ct3+ct4)/ct14<0.95；

wherein, ct1 is the first lens in the thickness on the optical axis, ct2 is the second lens in the thickness on the optical axis, ct3 is the third lens in the thickness on the optical axis, ct4 is the fourth lens in the thickness on the optical axis, ct14 is the distance from the object side of the first lens with the intersection of the optical axis to the image side of the fourth lens with the intersection of the optical axis.

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

1.6<sag102/sag71<2.1；

wherein sag102 is a distance from an intersection point of an image-side surface of the tenth lens element and the optical axis to a maximum effective radius of the image-side surface of the tenth lens element in a direction parallel to the optical axis, and sag71 is a distance from an intersection point of an object-side surface of the seventh lens element and the optical axis to a maximum effective radius of the object-side surface of the seventh lens element in a direction parallel to the optical axis.

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

0.7<|(sag92-sag91)/(sag82-sag81)|<1.2；

wherein, sag92 is a distance from an intersection point of an image side surface of the ninth lens element and the optical axis to a maximum effective radius of the image side surface of the ninth lens element in a direction parallel to the optical axis, sag91 is a distance from an intersection point of an object side surface of the ninth lens element and the optical axis to a maximum effective radius of an object side surface of the ninth lens element in a direction parallel to the optical axis, sag82 is a distance from an intersection point of an image side surface of the eighth lens element and the optical axis to a maximum effective radius of the image side surface of the eighth lens element in a direction parallel to the optical axis, and sag81 is a distance from an intersection point of an object side surface of the eighth lens element and the optical axis to a maximum effective radius of the object side surface of the eighth lens element 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.