CN115437113B - Optical lens, camera module and electronic equipment - Google Patents

Abstract

The invention discloses an optical lens, an image capturing module and an electronic device, wherein the optical lens has ten lens elements with refractive power, the ten lens elements sequentially comprise 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 along an optical axis from an object side to an image side, the first lens element and the second lens element have positive refractive power, the third lens element has negative refractive power, the fourth lens element and the fifth lens element have positive refractive power, the sixth lens element has negative refractive power, the eighth lens element has positive refractive power, and the tenth lens element has negative refractive power. The optical lens, the camera module and the electronic equipment provided by the invention 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.

Description

Optical lens, camera module and electronic equipment

Technical Field

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

Background

In recent years, with the development of image capturing technology, requirements for imaging quality of an optical lens are increasing, and meanwhile, light, thin and miniaturized structural features are also becoming the development trend of the optical lens. In the related art, under the design trend of light, thin and miniaturized optical lens, it is difficult to simultaneously meet the high-definition imaging requirement of people on the optical lens.

Disclosure of Invention

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

In order to achieve the above object, the present invention discloses, in a first aspect, an optical lens having ten lens elements with refractive power, the ten lens elements being, 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 and a concave image-side surface at a paraxial region;

the third 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 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 and a convex image-side surface at a paraxial region;

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

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 and a concave image-side surface at a paraxial region;

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

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

Wherein TTL is the distance from the object side surface of the first lens element to the imaging surface of the optical lens element on the optical axis (i.e., the total optical length of the optical lens element), and Imgh is the radius of the maximum effective imaging circle of the optical lens element (i.e., the half-image height of the optical lens element).

In the optical lens provided by the application, the positive refractive power and the convex-concave surface type design of the object side surface and the image side surface at the paraxial region provided by the first lens are beneficial to ensuring that the first lens has enough light converging capability, and the convex-concave surface type design of the positive refractive power and the object side surface and the image side surface of the second lens at the paraxial region can assist the first lens to converge light rays and is beneficial to correcting partial aberration generated by the first lens; the third lens element with negative refractive power and the fourth lens element with positive refractive power are combined, partial aberration generated by the third lens element and partial aberration generated by the fourth lens element can be offset by the opposite refractive powers of the third lens element and the fourth lens element, so that the third lens element and the fourth lens element can contribute less aberration ratio in the optical lens element, and meanwhile, the surface designs of the third lens element and the fourth lens element are convex at the paraxial region and concave at the image side region, so that the shape difference of the third lens element and the fourth lens element can be reduced, and the assembly consistency and yield of the optical lens element can be improved; the fifth lens element with positive refractive power and the sixth lens element with negative refractive power can balance the aberration generated by the fifth lens element with negative refractive power, reduce the tolerance sensitivity of the optical lens element, improve the imaging quality of the optical lens element, and the concave object-side surfaces of the fifth lens element and the sixth lens element can properly increase the deflection angle of incident light rays and enlarge the imaging circle of the optical lens element, thereby improving the imaging quality of the optical lens element, and simultaneously shortening the path of the optical lens element projected in the optical axis direction to control the total length of the optical lens element, thereby being beneficial to the miniaturization design of the optical lens element; 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, and can finally balance the aberration which is difficult to correct and is caused by each lens element on the object side when converging incident light rays, and can further converge the incident light rays by the complex lens element so as to compress the total length of the optical lens element; the ninth lens element with refractive power has negative refractive power, the object-side surfaces of the ninth lens element and the tenth lens element are convex at a paraxial region and concave at a paraxial region, and the ninth lens element and the tenth lens element cooperate with each other to correct aberration generated by the first lens element to the eighth lens element, thereby ensuring aberration balance of the optical lens element, facilitating smooth transition of marginal view field rays to an imaging plane at a smaller deflection angle, enabling the edge of the imaging plane to obtain higher relative brightness, avoiding dark angle, improving imaging quality, and facilitating realization of large image plane characteristics of the optical lens element to match with a photosensitive chip of higher pixel.

Further, by making the optical lens satisfy the following relation: 1.54< TTL/Imgh <1.59, thereby being beneficial to making the structure of the optical lens more compact, reducing the optical total length of the optical lens, ensuring the assembly sensitivity of the optical lens to be in an equilibrium state, being beneficial to making the optical lens have 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 at a position.

As an alternative implementation manner, 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 the above conditional expression is satisfied, the optical lens can have larger aperture and higher light flux, so that the imaging effect of the optical lens when working in a dark environment is improved, in addition, the aberration of the edge view field is reduced, the edge view field is ensured to have enough relative brightness, and the occurrence of a dark angle is avoided.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 7.5 DEG/mm < HFOV/f <8 DEG/mm. Where f is the focal length of the optical lens and HFOV is half 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, and the optical lens has a good tele-imaging function, thereby enlarging the imaging range of the optical lens on a long-distance object and presenting a clearer shooting effect. When the upper limit of the relation is exceeded, the field angle of the optical lens is too large, so that the off-axis field distortion is too large, the distortion phenomenon can occur at the periphery of an image, and the imaging performance of the optical lens is reduced; when the focal length of the optical lens is lower than the lower limit of the relation, the miniaturization of the optical lens is not facilitated, the angle of view is too small, the range of the angle of view of the optical lens is not facilitated to be met, enough object space information cannot be obtained, and the shooting quality of the optical lens is affected.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.3.ltoreq.f1234/f <1.35. Where f is a focal length of the optical lens, and f1234 is a combined focal length of a first lens group including a first lens, a second lens, a third lens, and a fourth lens. When the above conditional expression is satisfied, the refractive power contribution of the first lens element to the fourth lens element is reasonably distributed, the light deflection angle is reduced, the sensitivity of the optical lens is reduced, meanwhile, the refractive power intensity of the first lens element group is enough, light is effectively deflected, the total length of the first lens element group is reduced, and the miniaturization characteristic of the optical lens is realized.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -1.6< 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 above conditional expression is satisfied, the refractive power of the optical lens is favorably distributed to each lens of the second lens group and the third lens group in an equalizing manner, the overall aberration of the optical lens is favorably balanced, and good imaging quality is ensured.

As an alternative implementation manner, 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 radius of curvature of the image side surface of the second lens element at the optical axis, r21 is a radius of curvature of the 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 above conditional expression is satisfied, the second lens is favorable for providing proper positive focal power for the optical lens, so that the second lens has enough light converging capability, stray light generated by the first lens is favorably eliminated, chromatic aberration is corrected, and balance of various aberrations of the optical lens is promoted, so that good imaging quality is obtained.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: -4.5< r51/r52< -1. Wherein r51 is a radius of curvature of the object side surface of the fifth lens element at the optical axis, and r52 is a radius of curvature of the image side surface of the fifth lens element at the optical axis. When the above conditional expression is satisfied, the surface shape of the fifth lens can be reasonably controlled, the astigmatic quantity contribution of the fifth lens can be effectively controlled, the imaging quality of the intermediate view field is ensured, the aberration of the optical lens is favorably corrected, the distortion balance of the optical lens is ensured, meanwhile, the surface shape of the object side surface and the image side surface of the fifth lens at the optical axis is prevented from being excessively bent, the processing difficulty of the fifth lens is favorably reduced, and the yield of the fifth lens is improved.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.88< (ct1+ct2+ct3+ct4)/ct14 <0.95. Wherein ct1 is the thickness of the first lens element on the optical axis, ct2 is the thickness of the second lens element on the optical axis, ct3 is the thickness of the third lens element on the optical axis, ct4 is the thickness of the fourth lens element on the optical axis, and ct14 is the distance from the intersection point of the object side surface of the first lens element and the optical axis to the intersection point of the image side surface of the fourth lens element and the optical axis. When the above conditional expression is satisfied, the optical lens is favorable to have enough air gap ratio, the stability and good imaging quality of the optical lens are ensured, and meanwhile, the total length of the optical lens is favorable to be shortened, the assembly difficulty is reduced, and the assembly stability is improved.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.6< sag102/sag71<2.1. Where, the sag102 is a distance from an intersection point of the 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 (i.e., a sagittal height of the image side surface of the tenth lens element), and the sag71 is a distance from an intersection point of the 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 (i.e., a sagittal height of the object side surface of the seventh lens element). When the above conditional expression is satisfied, the object side and the image side of the third lens group are reasonably controlled, so that light can be effectively deflected, shortening the total length of the optical lens is facilitated, correcting the aberration generated by the first lens group and the second lens group (i.e. the first lens to the sixth lens), facilitating the optical lens to be matched with the photosensitive chip with higher pixels, and improving the imaging quality. When the upper limit of the relation is exceeded, the sagittal height of the image side surface of the tenth lens is overlarge, and the surface curvature of the tenth lens is overlarge, so that the molding assembly stability of the tenth lens is not facilitated; when the surface shape of the tenth lens is too gentle and the light ray is not deflected sufficiently, the third lens group is not favorable to correct the aberration generated by the first lens group and the second lens group, and the imaging quality is reduced.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.7< | (sag 92-sag 91)/(sag 82-sag 81) | <1.2. Where, sag92 is a distance from an intersection point of the 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 (i.e., a sagittal height of the image side surface of the ninth lens element), sag91 is a distance from an intersection point of the object side surface of the ninth lens element and the optical axis to a maximum effective radius of the object side surface of the ninth lens element in a direction parallel to the optical axis (i.e., a sagittal height of the object side surface of the ninth lens element), sag82 is a distance from an intersection point of the 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 (i.e., a sagittal height of the object side surface of the eighth lens element), and sag81 is a distance from an intersection point of the 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 (i.e., a sagittal height of the object side surface of the eighth lens element). When the relation is satisfied, the surface shapes of the ninth lens and the eighth lens are favorable to be restrained, the surface shapes are matched with the first lens group and the second lens group, the light rays with the edge view field are ensured to have smaller deflection angles, the relative brightness of the edge view 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 difference between the object side surface and the image side surface of the eighth lens element is smaller than the lower limit of the above-mentioned relation, the difference between the object side surface and the image side surface is too large, which is not beneficial to correcting the aberration such as field curvature spherical aberration of the optical lens element, and good imaging quality cannot be ensured; when the upper limit of the above relation is exceeded, the sagittal difference between the object side surface and the image side surface of the ninth lens element is too large, and the sensitivity increases, which is disadvantageous for the molding of the ninth lens element.

In a second aspect, the present invention discloses an image capturing module, where the image capturing module includes a photosensitive chip and the optical lens described in the first aspect, and the photosensitive chip is disposed on an image side of the optical lens. The imaging 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 miniaturized design of the optical lens.

In a third aspect, the invention discloses an electronic device, which comprises a housing and the camera module set in the second aspect, wherein the camera module set is arranged in 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 image pickup module and the electronic equipment provided by the embodiment of the invention, ten lenses are adopted in the optical lens, the refractive power and the surface shape of each lens are designed, the imaging quality of the optical lens is improved, and the total length of the optical lens is controlled while the optical lens meets the following relational expression: 1.54< TTL/Imgh <1.59, further making the structure of the optical lens more compact, reducing the optical total length of the optical lens, ensuring that the assembly sensitivity of the optical lens is in an equilibrium state, and being beneficial to making the optical lens have 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 at the position.

Drawings

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

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

Fig. 2 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram (%) of an optical lens according to the first embodiment of the present application;

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

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

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

Fig. 6 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram (%) of an optical lens according to a third embodiment of the present application;

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

fig. 8 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram (%) of an optical lens according to a fourth embodiment of the present application;

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

Fig. 10 is a longitudinal spherical aberration diagram (mm), astigmatic curve diagram (mm) and distortion curve diagram (%) of an optical lens according to a fifth embodiment of the present application;

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

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

Detailed Description

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

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

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

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

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

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

Referring to fig. 1, according to a first aspect of the present application, the present application discloses an optical lens 100, wherein the optical lens 100 has ten lens elements with refractive power, and the ten lens elements are 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 in order from an object side to an image side along an optical axis O. In 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 order 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 positive 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 positive 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 third lens element L3 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, 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 at the paraxial region O, the seventh lens element or the concave at the paraxial region O, the object-side surface S7 can be convex at the paraxial region O, the object-side surface S8 can be concave at the eighth lens element S9 at the paraxial region O, the image-side surface S8 can be concave at the eighth lens element S10 at the paraxial region O, the image-side surface S9 at the paraxial region O8 can be concave at the paraxial region O, and the image-side surface S9 at the image-side surface S10 at the eighth lens element L9 at the paraxial region O can be concave at the paraxial region O.

In the optical lens 100 provided by the present application, the positive refractive power provided by the first lens element L1 and the concave-convex surface type designs of the object-side surface S1 and the image-side surface S2 at the paraxial region O are beneficial to ensuring that the first lens element L1 has sufficient light converging capability, and the combination of the positive refractive power of the second lens element L2 and the concave-convex surface type designs of the object-side surface S3 and the image-side surface S4 at the paraxial region O can assist the first lens element L1 to converge light, thereby being beneficial to correcting partial aberration generated by the first lens element L1; by combining the third lens element L3 with negative refractive power and the fourth lens element L4 with positive refractive power, partial aberrations generated by the third lens element L3 and the fourth lens element L4 can be mutually offset by the opposite refractive powers of the third lens element L3 and the fourth lens element L4, so that the third lens element L3 and the fourth lens element L4 can contribute less aberration to the optical lens element 100, and the planar designs of the third lens element L3 and the fourth lens element L4 are convex at the paraxial region O and concave at the image-side region O, so as to reduce the shape difference of the third lens element L3 and the fourth lens element L4 and improve the assembly consistency and yield of the optical lens element 100; the biconvex shape of the fifth lens element L5 and the object-side surface S11 of the sixth lens element L6 are concave at the paraxial region O, and are matched with the seventh lens element L7 with refractive power, so that the deflection angle of incident light can be properly increased, the imaging circle of the optical lens element 100 can be enlarged, the imaging quality of the optical lens element 100 can be improved, and meanwhile, the path of the optical lens element 100 projected in the optical axis direction can be shortened, so that the total length of the optical lens element 100 can be controlled, and the miniaturization design of the optical lens element 100 is facilitated; 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 aberrations of the object-side lens element, which are difficult to correct when converging the incident light rays, and further converge the incident light rays with the complex lens element to compress the total length of the optical lens element 100; the ninth lens element L9 with refractive power, the tenth lens element L10 with negative refractive power, wherein the object-side surfaces of the ninth lens element L9 and the tenth lens element L10 are convex at the paraxial region, the image-side surface S20 is concave at the paraxial region O, and the ninth lens element L9 and the tenth lens element L10 cooperate with each other to correct the aberration generated by the first lens element L1 to the eighth lens element L8, thereby ensuring the aberration balance of the optical lens element 100, facilitating the smooth transition of the marginal field light to the imaging surface 101 at a smaller deflection angle, improving the imaging quality, and achieving the large image surface of the optical lens element 100.

In some embodiments, the optical lens 100 may be applied to electronic devices such as a smart phone and a smart tablet, and materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 may be plastic, so that the optical lens 100 has a good optical effect and meanwhile, 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 at least one lens in the optical lens 100 may also be glass, and the lens with glass material can withstand higher or lower temperature and has excellent optical effect and better stability. In some embodiments, at least two lenses of different materials may be disposed in the optical lens 100, for example, a combination of glass lens and plastic lens may be used, but the specific configuration relationship may be determined according to practical requirements, which is not meant to be exhaustive.

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

In some embodiments, the optical lens 100 further includes an optical filter L11, such as an infrared optical filter, disposed between the image side surface S20 of the tenth lens L10 and the imaging surface 101 of the optical lens 100, so as to filter out light rays of 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, i.e., the optical lens 100 can also image in a dim environment and other special application scenarios and obtain better image effects.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.54< TTL/Imgh <1.59. Wherein TTL is a distance from the object side surface S1 of the first lens element L1 to the imaging surface 101 of the optical lens element 100 on the optical axis O (i.e., the total optical length of the optical lens element 100), and Imgh is a radius of a maximum effective imaging circle of the optical lens element 100 (i.e., a half image height of the optical lens element 100). In particular, 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 and the half image height of the optical lens 100 within a reasonable range, the structure of the optical lens 100 is more compact, the total optical length of the optical lens 100 is reduced, the assembly sensitivity of the optical lens 100 is ensured to be in a balanced state, the optical lens 100 is also facilitated to have the characteristic of a large image plane, and the optical lens 100 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 the above conditional expression is satisfied, the optical lens 100 can have a larger aperture and a higher light flux, so as to improve the imaging effect of the optical lens 100 when working in a dark environment, and in addition, the aberration of the marginal view field is reduced, the marginal view field is ensured to have enough relative brightness, and the occurrence of a dark angle is avoided.

In some embodiments, the optical lens 100 satisfies the following relationship: 7.5 DEG/mm < HFOV/f <8 DEG/mm. Where f is the focal length of the optical lens 100 and HFOV is half the maximum field angle of the optical lens 100. In particular, HFOV/f may be 7.550/mm, 7.805/mm, 7.950/mm, or 7.99/mm, etc. 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 under a certain focal length, so that the optical lens 100 has a good telephoto imaging function, thereby enlarging the imaging range of the optical lens 100 on a remote 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 excessive off-axis field distortion, resulting in distortion of the image periphery and lowering the imaging performance of the optical lens 100; when the focal length of the optical lens 100 is lower than the lower limit of the above-mentioned relation, the miniaturization of the optical lens 100 is not facilitated, the viewing angle is too small, the viewing angle range of the optical lens 100 is not satisfied, enough object space information cannot be obtained, and the shooting quality of the optical lens 100 is affected.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.3.ltoreq.f1234/f <1.35. Where f is a focal length of the optical lens 100, and f1234 is a combined focal length of a first lens group including a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4. In particular, f1234/f may be 1.30, 1.320, 1.340, 1.349, or the like. When the above conditional expression is satisfied, it is beneficial to reasonably distributing the refractive power contribution amounts of the first lens element L1 to the fourth lens element L4, reducing the light deflection angle, and reducing the sensitivity of the optical lens 100, and meanwhile, it is beneficial to make the refractive power intensity of the first lens element group sufficient, and the light can be effectively deflected, so as to reduce the total length of the first lens element group, and realize the miniaturization characteristic of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: -1.6< 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 expression is satisfied, the refractive power of the optical lens 100 is favorably distributed to each lens of the second lens group and the third lens group in an equalizing manner, the overall aberration of the optical lens 100 is favorably balanced, and good imaging quality is ensured.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.2< (r 22-r 21)/f 2<2.1. Where r22 is a radius of curvature of the image side surface S4 of the second lens element L2 at the optical axis O, r21 is a radius of curvature 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 expression is satisfied, the second lens L2 is favorable to provide the optical lens 100 with a proper positive focal power, so that the second lens L2 obtains a sufficient light converging capability, and is favorable to eliminate stray light generated by the first lens L1, correct chromatic aberration, and promote balance of various aberrations of the optical lens 100 to obtain good imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship: -4.5< r51/r52< -1. Wherein r51 is a radius of curvature of the object side surface S9 of the fifth lens element L5 at the optical axis O, and r52 is a radius of curvature of the image side surface S10 of the fifth lens element L5 at 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 above conditional expression is satisfied, the surface shape of the fifth lens L5 is reasonably controlled, so as to effectively control the astigmatic quantity contribution of the fifth lens L5, further ensure the imaging quality of the intermediate view field, facilitate correcting the aberration of the optical lens 100, ensure the balance of the distortion of the optical lens 100, and simultaneously avoid the excessive bending of the surface shapes of the object side surface S9 and the image side surface S10 of the fifth lens L5 at the optical axis O, facilitate reducing the processing difficulty of the fifth lens L5, and improve the yield of the fifth lens L5.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.88< (ct1+ct2+ct3+ct4)/ct14 <0.95. Wherein ct1 is the thickness of the first lens element L1 on the optical axis O, ct2 is the thickness of the second lens element L2 on the optical axis O, ct3 is the thickness of the third lens element L3 on the optical axis O, ct4 is the thickness of the fourth lens element L4 on the optical axis O, and ct14 is the distance from the intersection point of the object side surface S1 of the first lens element L1 and the optical axis O to the intersection point of the image side surface S8 of the fourth lens element L4 and the optical axis O. Specifically, (ct1+ct2+ct3+ct4)/ct 14 may be 0.89, 0.90, 0.91, 0.93, or 0.94, etc. When the above conditional expression is satisfied, the optical lens 100 is beneficial to have enough air gap ratio, ensure the stability and good imaging quality of the optical lens 100, and simultaneously, be beneficial to shortening the total length of the optical lens 100, reducing the assembly difficulty and improving the assembly stability.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.6< sag102/sag71<2.1. Where, sag102 is a distance from an intersection point of the image side surface S20 of the tenth lens L10 and the optical axis O to a maximum effective radius of the image side surface S20 of the tenth lens L10 in a direction parallel to the optical axis (i.e., a sagittal height of the image side surface S20 of the tenth lens L10), and sag71 is a distance from an intersection point of the object side surface S13 of the seventh lens L7 and the optical axis O to a maximum effective radius of the object side surface S13 of the seventh lens L7 in a direction parallel to the optical axis (i.e., a sagittal height of the object side surface S13 of the seventh lens L7). Specifically, the sag102/sag71 may be 1.65, 1.70, 1.80, 1.95, 2.0, 2.05, or the like. When the above conditional expressions are satisfied, the object-side and image-side surface types of the third lens group are reasonably controlled, so that light can be effectively deflected, which is beneficial to shortening the total length of the optical lens 100, correcting the aberration generated by the first lens group and the second lens group (i.e. the first lens L1 to the sixth lens L6), and being beneficial to matching the optical lens 100 with a higher pixel photosensitive chip, and improving the imaging quality. When the upper limit of the above relation is exceeded, the sagittal height 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 not favorable for the molding and assembling stability of the tenth lens L10; when the surface shape of the tenth lens L10 is less than the lower limit of the above-mentioned relation, the surface shape is too gentle, the deflection of light is insufficient, and the third lens group is unfavorable for correcting the aberration generated by the first lens group and the second lens group, and the imaging quality is lowered.

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 from an intersection point of the image side surface S18 of the ninth lens element L9 and the optical axis O to a maximum effective radius of the image side surface S18 of the ninth lens element L9 in a direction parallel to the optical axis (i.e., a sagittal height of the image side surface S18 of the eighth lens element L9), sag91 is a distance from an intersection point of the object side surface S17 of the ninth lens element L9 and the optical axis O to a maximum effective radius of the object side surface S17 of the ninth lens element L9 in a direction parallel to the optical axis (i.e., a sagittal height of the object side surface S17 of the ninth lens element L9), sag82 is a distance from an intersection point of the image side surface S16 of the eighth lens element L8 and the optical axis O to a maximum effective radius of the image side surface S16 of the eighth lens element L8 in a direction parallel to the optical axis (i.e., a sagittal height of the image side surface S16 of the eighth lens element L8), and sag81 is a distance from an intersection point of the object side surface S15 of the eighth lens element L8 and the optical axis O to a maximum effective radius of the object side surface S15 of the eighth lens element L8 in a direction parallel to the optical axis 8. 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, or 1.19, etc. When the above 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 view rays are ensured to have smaller deflection angles, the relative brightness of the marginal view of the optical lens 100 is improved, meanwhile, the ninth lens L9 is prevented from being excessively bent, and the machinability of the ninth lens L9 is improved. When the difference between the bending degrees of the object side surface S15 and the image side surface S16 of the eighth lens element L8 is smaller than the lower limit of the above-mentioned relation, the aberration such as field curvature spherical aberration of the optical lens 100 is not easily corrected, and good imaging quality cannot be ensured; when the upper limit of the above relation is exceeded, the difference in sagittal height between the object side surface S17 and the image side surface S18 of the ninth lens element L9 is too large, and the sensitivity increases, which is disadvantageous for the molding of the ninth lens element L9.

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

First embodiment

As shown in fig. 1, the optical lens 100 according to the first embodiment of the present application has 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 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 element L11. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 are described in the above embodiments, and are not repeated here.

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.

Further, the object-side surface S1 and the image-side surface S2 of the first lens element L1 are convex and concave at the paraxial region O, respectively; 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 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 concave at the paraxial region O; the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are concave and convex at the paraxial region O, respectively, and the object-side surface S15 and the image-side surface S16 of the eighth lens element L8 are convex and concave at the paraxial region O, respectively; the object-side surface S17 and the image-side surface S18 of the ninth lens element L9 are 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 convex and concave, respectively, at the paraxial region O.

Specifically, taking 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=6.16 mm of the optical lens 100, and the f-number fno=1.49 as examples, other parameters of the optical lens 100 are given in table 1 below. The elements from the object side to the image side are sequentially arranged in the order of the elements from top to bottom in table 1 along the optical axis O of the optical lens 100. In the same lens element, the surface with smaller surface number is the object side surface of the lens element, and the surface with larger surface number is the image side surface of the lens element, and the surface numbers 2 and 3 correspond to the object side surface S1 and the image side surface S2 of the first lens element L1, respectively. The radius Y in table 1 is the radius of curvature of the object or image side of the corresponding surface number at the paraxial region O. The first value in the "thickness" parameter array of the lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image side surface of the lens to the latter surface on the optical axis O. The value of the aperture 102 in the "thickness" parameter row is the distance between the aperture 102 and the vertex of the subsequent surface (the vertex refers to the intersection point of the surface and the optical axis O) on the optical axis O, and 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 by default, when the value is negative, it indicates that the aperture 102 is disposed on the image side of the vertex of the subsequent surface, and when the thickness of the aperture 102 is positive, the aperture 102 is on the object side of the vertex of the subsequent surface. It is understood that the units of the radius, thickness and focal length of Y in table 1 are all mm, and the reference wavelength of refractive index and abbe number of each lens in table 1 is 587.6nm, and the reference wavelength of 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 aspherical, and the surface shape x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:

Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of the radius R of Y in table 1 above); k is a conic coefficient; ai is a correction coefficient corresponding to the i-th higher term of the aspherical surface. The higher order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for the respective aspherical lenses S1-S20 in the first embodiment are given in Table 2.

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows a longitudinal spherical aberration diagram of the optical lens 100 of the first embodiment at wavelengths of 430nm, 470nm, 510nm, 555nm, 610nm, and 650 nm. In fig. 2 (a), the abscissa along the X-axis direction represents the focus shift, and the ordinate along the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the optical lens 100 in the first embodiment has a better spherical aberration value, which indicates that the optical lens 100 in the present embodiment has a better imaging quality.

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

Referring to fig. 2 (C), fig. 2 (C) is a graph showing a distortion curve of the optical lens 100 at a wavelength of 555nm in the first embodiment. Wherein, the abscissa along the X-axis direction represents distortion, and the ordinate along the Y-axis direction represents image height in mm. As can be seen from fig. 2 (C), the distortion of the optical lens 100 is well corrected at a wavelength of 555 nm.

Second embodiment

Referring to fig. 3, fig. 3 is a schematic structural diagram of an optical lens 100 according to a second embodiment of the present application. The optical lens 100 has ten lenses with refractive power, which are, in order from the object side to the image side along the optical axis O, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and a filter L11. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 are described in the above embodiments, and are not repeated here.

Further, in the second embodiment, the refractive powers of the respective lenses are different from those of 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 type of each lens differs from that 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 takes the focal length f=4.928 mm of the optical lens 100, the maximum field angle fov= 75.744 ° of the optical lens 100, the total optical length ttl=6.16 mm of the optical lens 100, and the f-number fno=1.49 as examples. Other parameters in the second embodiment are given in table 3 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of Y radius, thickness, and focal length in Table 3 are all mm. And the refractive index and Abbe number of each lens in Table 3 were 587.6nm, and the reference wavelength of the focal length was 555nm.

TABLE 3 Table 3

In the second embodiment, table 4 gives the higher order coefficients that can be used for each aspherical lens in the second embodiment, where each aspherical surface profile can be defined by the formula given in the first embodiment.

TABLE 4 Table 4

Referring to fig. 4, as shown in fig. 4, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled by the (a) longitudinal spherical aberration diagram, the (B) astigmatic curve diagram and the (C) distortion curve diagram, so that the optical lens 100 of the embodiment has good imaging quality. In addition, the wavelengths corresponding to the curves in fig. 4 (a), 4 (B) and 4 (C) may refer to the contents described in the first embodiment in fig. 2 (a), 2 (B) and 2 (C), and will not be repeated here.

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 has ten lenses with refractive power, which are, in order from the object side to the image side along the optical axis O, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and a filter L11. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 are described in the above embodiments, and are not repeated here.

Further, in the third embodiment, the refractive powers of the respective lenses coincide with those of the first embodiment. Meanwhile, in the third embodiment, the surface shape of each lens coincides with that in the first embodiment.

The third embodiment takes 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 as examples. Other parameters in the third embodiment are given in table 5 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 5 are all mm, and the reference wavelength of refractive index and abbe number of each lens in table 5 is 587.6nm, and the reference wavelength of focal length is 555nm.

TABLE 5

In the third embodiment, table 6 gives the higher order coefficients that can be used for each aspherical lens in the third embodiment, where each aspherical surface profile can be defined by the formula given in the first embodiment.

TABLE 6

Referring to fig. 6, as can be seen from the (a) longitudinal spherical aberration diagram, (B) astigmatic curve diagram and (C) distortion diagram in fig. 6, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 6 (a), 6 (B) and 6 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B) and 2 (C), and the description thereof will be omitted 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 100 has ten lenses with refractive power, which are, in order from the object side to the image side along the optical axis O, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and a filter L11. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 are described in the above embodiments, and are not repeated here.

Further, in the fourth embodiment, the refractive powers of the respective lenses coincide with those of the first embodiment. In the fourth embodiment, however, the surface type of each lens differs from that in 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 takes 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=6.1 mm of the optical lens 100, and the f-number fno=1.44 as examples. Other parameters in the fourth embodiment are given in table 7 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 7 are all mm, and the reference wavelength of refractive index and abbe number of each lens in table 7 is 587.6nm, and the reference wavelength of focal length is 555nm.

TABLE 7

In the fourth embodiment, table 8 gives the higher order coefficients that can be used for each aspherical lens in the fourth embodiment, where each aspherical surface profile can be defined by the formula given in the first embodiment.

TABLE 8

Referring to fig. 8, as shown in fig. 8, the longitudinal spherical aberration, astigmatism and distortion of the optical lens 100 are well controlled, so that the optical lens 100 of the embodiment has good imaging quality. In addition, regarding the wavelengths corresponding to the curves in fig. 8 (a), 8 (B) and 8 (C), reference may be made to what is described in the first embodiment with respect to fig. 2 (a), 2 (B) and 2 (C), and the description thereof will be omitted 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 application. The optical lens 100 has ten lenses with refractive power, which are, in order from the object side to the image side along the optical axis O, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, and a filter L11. The materials of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, the eighth lens L8, the ninth lens L9 and the tenth lens L10 are described in the above embodiments, and are not repeated here.

Further, in the fifth embodiment, the refractive powers of the respective lenses coincide with those of the first embodiment. In the fifth embodiment, however, the surface type of each lens differs from that in the first embodiment in that: the object-side surface S13 and the image-side surface S14 of the seventh lens element L7 are convex and concave, respectively.

The fifth embodiment takes 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 as examples. Other parameters in the fifth embodiment are given in table 9 below, and the definition of each parameter can be derived from the description of the foregoing embodiment, which is not repeated here. It is understood that the units of the radius, thickness and focal length of Y in table 9 are all mm, and the reference wavelength of the refractive index and 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 higher order coefficients that can be used for each aspherical lens in the fifth embodiment, where each aspherical surface profile can be defined by the formula given in the first embodiment.

Table 10

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

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

TABLE 11

Referring to fig. 11, the application further discloses an image capturing module, wherein the image capturing module 200 includes a photosensitive chip 201 and the optical lens 100, and the photosensitive chip 201 is disposed on an image side of the optical lens 100. The optical lens 100 may be used to receive an optical signal of a subject and project the optical signal to the photo-sensing chip 201, and the photo-sensing chip 201 may be used to convert the optical signal corresponding to the subject into an image signal. It can be appreciated that the image capturing module 200 with the optical lens 100 can correct the aberration of the optical lens 100 and improve the imaging quality of the optical lens 100 while realizing a light, thin and miniaturized design of the optical lens 100.

Referring to fig. 12, the application further discloses an electronic device, wherein the electronic device 300 includes a housing 301 and the above-mentioned camera module 200, and the camera module 200 is disposed in 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, etc. It can be appreciated that the electronic device 300 having the image capturing module 200 also has all the technical effects of the optical lens 100. That is, the 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 slim, 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, and specific examples are applied to the description of the principles and the implementation modes of the present invention, and the description of the above embodiments is only used to help understand the optical lens, the camera module, the electronic device and the core ideas thereof; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.

Claims (10)

1. An optical lens, characterized in that the optical lens has ten lens elements with refractive power, and the ten lens elements are, 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 and a concave image-side surface at a paraxial region;

the third 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 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 and a convex image-side surface at a paraxial region;

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

The ninth lens element with refractive power has a convex object-side surface at a paraxial region, a concave image-side surface at a paraxial region, and one of the ninth lens element and the seventh lens element with positive refractive power and the other with negative refractive power; the tenth 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 optical lens satisfies the following relation:

1.54＜TTL/Imgh＜1.59；

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

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

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

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

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

1.3.ltoreq.f1234/f < 1.35, and/or-1.6 < 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. The optical lens of claim 1, wherein the optical lens satisfies the following relationship:

0.2＜(r22-r21)/f2＜2.1；

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

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

-4.5＜r51/r52＜-1；

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

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

0.88＜(ct1+ct2+ct3+ct4)/ct14＜0.95；

Wherein ct1 is the thickness of the first lens element on the optical axis, ct2 is the thickness of the second lens element on the optical axis, ct3 is the thickness of the third lens element on the optical axis, ct4 is the thickness of the fourth lens element on the optical axis, and ct14 is the distance from the intersection point of the object side surface of the first lens element and the optical axis to the intersection point of the image side surface of the fourth lens element and the optical axis.

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

1.6＜sag102/sag71＜2.1；

Where, sag102 is a distance 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 in a direction parallel to the optical axis, and sag71 is a distance 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 in a direction parallel to the optical axis.

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

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

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

9. An imaging module, wherein the imaging module comprises a photosensitive chip and the optical lens according to any one of claims 1 to 8, and 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 on the housing.