CN113433654A

CN113433654A - Optical lens, camera module and electronic equipment

Info

Publication number: CN113433654A
Application number: CN202110645296.2A
Authority: CN
Inventors: 杨健; 华露; 李明
Original assignee: Jiangxi Jingchao Optical Co Ltd
Current assignee: Jiangxi Jingchao Optical Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-09-24
Anticipated expiration: 2041-06-09
Also published as: CN113433654B

Abstract

The invention discloses an optical lens, a camera module and an electronic device, wherein the optical lens comprises a lens body and a lens cover, the lens body is sequentially provided with the following components from an object side to an image side along an optical axis: a first lens element with positive refractive power having a convex object-side surface at paraxial region; a second lens element with negative refractive power having a concave image-side surface at paraxial region; the third lens element, the fourth lens element and the fifth lens element with refractive power have concave image-side surfaces at paraxial regions, and the optical lens element satisfies the following relationship: 0.4< ImgH/ObjH <1.2, wherein ImgH is the radius of the maximum effective imaging circle of the optical lens, and ObjH is half of the height of an object corresponding to the maximum effective imaging circle of the optical lens. The optical lens, the camera module and the electronic equipment provided by the embodiment of the invention have larger effective focal length and magnification while realizing miniaturization, and can clearly shoot local detail information of an object within the range of 5mm to 20 mm.

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

With the rapid development of science and technology, the application of small electronic devices (such as mobile phones, tablet computers, telephone watches, etc.) is becoming more and more popular, and the functions thereof are becoming more and more diversified, especially the requirements for the camera function are becoming more and more diversified. At present, in order to meet the increasing shooting requirements of people, most of electronic equipment adopts configurations in different forms such as long focal length, wide angle, large aperture, micro-distance and the like so as to meet different use requirements.

Under the development trend of miniaturization and lightness and thinness of the smart phone, the corresponding camera also needs to meet the micro-design, but the micro-designed camera has the problems of poor macro shooting effect, poor imaging quality and the like, and cannot meet the high-quality shooting requirement of the electronic equipment.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module and electronic equipment, which can simultaneously have a small field angle and a large focal length, and can realize a larger magnification range so as to meet the requirement of high-quality shooting.

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

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

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

the third lens element with refractive power;

the fourth lens element with refractive power;

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

the optical lens satisfies the following relation:

0.4<ImgH/ObjH<1.2；

wherein ImgH is the radius of the maximum effective imaging circle of the optical lens, and ObjH is half of the height of the object corresponding to the maximum effective imaging circle of the optical lens.

When light enters the first lens element, the first lens element is utilized to provide positive refractive power for the optical lens element, so that the optical lens element has sufficient light converging capability, and further the optical lens element obtains sufficient relative illumination, thereby improving the imaging quality of the optical lens element. The second lens element with negative refractive power is used to correct distortion, aberration and astigmatism generated by the front lens element (i.e. the first lens element), and the second lens element is used to cooperate with the rear lens element (i.e. the third lens element, the fourth lens element and the fifth lens element) to achieve aberration balance of the optical lens assembly, thereby further improving the resolving power of the optical lens assembly and improving the imaging quality of the optical lens assembly. Furthermore, the image side surface of the fifth lens is concave at the paraxial region, so that the external view field light can obtain a smaller deflection angle, at the moment, the light can be incident on the imaging surface of the optical lens at a more reasonable angle, and the optical lens can be better adapted to the image sensor to obtain a high-quality imaging effect. By adopting the refractive power and the surface type configuration, the small-field-angle shooting is favorably realized, and the light rays in a small angle can be conveniently and stably converged into the optical lens, so that the imaging quality of the optical lens is improved. In addition, the optical lens of the present application satisfies the relational expression: 0.4< ImgH/ObjH <1.2, which is beneficial for the optical lens to obtain the maximum effective focal length and better magnification, can realize clear local detail information of a macro object, and can help a user to obtain better macro shooting experience.

As an optional implementation manner, in an embodiment of the first aspect of the present invention, the optical lens further includes a right-angle prism, and the right-angle prism is located between an object plane of the optical lens and the first lens. The right-angle prism comprises an incident surface, an emergent surface and a reflecting surface connected with the incident surface and the emergent surface, the emergent surface faces to an image side, and the optical lens satisfies the following relational expression:

0.5<ip/op<2.5；

5mm≤op≤20mm；

and ip is the distance between the imaging surface of the optical lens and the emergent surface of the right-angle prism, and op is the distance between the object surface of the optical lens and the incident surface of the right-angle prism.

The right-angle prism is additionally arranged between the object plane of the optical lens and the first lens, so that the total length of the optical lens can be reduced while the requirements of large effective focal length and small field angle are met, and further the miniaturization design of the optical lens is realized. Meanwhile, the optical lens is defined to satisfy the relation: 0.5< ip/op < 2.5; when op is more than or equal to 5mm and less than or equal to 20mm, the micro-distance shooting of the object distance within the range from 5mm to 20mm is facilitated, and meanwhile, the optical lens can be miniaturized on the premise of having a large effective focal length and a high magnification ratio, so that the requirements of a small camera module and a small electronic device are met.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation:

2.4<EPD/sd22<3；

and EPD is the diameter of the entrance pupil of the optical lens, and sd22 is half of the maximum effective aperture of the image side surface of the second lens.

Through control optical lens's entrance pupil diameter with the ratio of the biggest effective half bore of image side of second lens can be so that under the condition of carrying out the macro shooting, guarantee optical lens has sufficient light inlet quantity, lets the user can shoot the local detail of more objects when carrying out the macro shooting, under the prerequisite that realizes great effective focal length and magnification, has higher formation of image quality, promotes user and uses experience.

Optionally, the optical lens satisfies the following relation:

tan(semiFOV)<0.2；

wherein semiFOV is a half field angle of the optical lens.

The small angle of view contributes to an improvement in the effective focal length and the magnification of the optical lens, and when the above-mentioned relational expressions are satisfied, the optical lens can be made to have a characteristic of a large effective focal length (i.e., a telephoto characteristic) and a characteristic of a large magnification. The long-focus characteristic can enable the optical lens to obtain a large depth of field range and a large focal depth range, and can realize rapid capture of a local part of a shot object; the large magnification ratio can realize the amplification effect on tiny details so as to realize that the optical lens can clearly shoot the local part of the shot object. Because the optical lens effectively combines the long-focus characteristic with the large magnification, when the object with the micro distance is shot, the fast focusing can be realized, the local range of the shot object can be quickly captured, and the local range of the shot object can be amplified, so that the object with the micro distance can be clearly shot. Therefore, the optical lens can realize the rapid focusing of a macro object and obtain a high-quality imaging effect so as to improve the use experience of a user.

1.4<ct15/BFL<2；

wherein ct15 is a distance between an object-side surface of the first lens element and an image-side surface of the fifth lens element on the optical axis, and BFL is a minimum distance between the image-side surface of the fifth lens element and an image plane of the optical lens in the optical axis direction (i.e., back focus).

By reasonably configuring the ratio of the thickness of part of the lenses of the optical lens to the back focus, namely the ratio of the thickness of the object side surface of the first lens to the thickness of the image side surface of the fifth lens on the optical axis to the back focus is in the range of the relational expression, the realization of a larger effective focal length and a larger magnification ratio is facilitated, so that the optical lens has a larger focusing range in the debugging process. In addition, satisfying the above relation is also beneficial to obtaining a back focus long enough to ensure that the optical lens finds the best focus.

0.5<ct23/ct45<1.6；

wherein, ct23 is the distance between the image-side surface of the second lens element and the object-side surface of the third lens element on the optical axis, and ct45 is the distance between the image-side surface of the fourth lens element and the object-side surface of the fifth lens element on the optical axis.

Satisfying above-mentioned relational expression, be favorable to making second lens with obtain suitable interval between third lens, fourth lens with the fifth lens to realize the characteristic of small field angle and great magnification, simultaneously, be favorable to slowing down light deflection, can adjust optical lens's curvature of field reduces the sensitivity, and then obtains better image quality. In addition, the relation is satisfied, the processing and assembling characteristics can be ensured, and the problems of large molding difficulty, easy assembly deformation and the like caused by interference of front and rear lenses and over-thin lenses in the assembling process due to over-small gaps are avoided.

-1.9<f2/(f12-f345)<-0.2；

wherein f2 is a focal length of the second lens, f12 is a combined focal length of the first lens and the second lens, and f345 is a combined focal length of the third lens, the fourth lens, and the fifth lens.

By reasonably configuring the refractive power of each lens, the focal length of each lens meets the requirement of the relational expression, which is beneficial to balancing the aberration of the optical lens, reducing the sensitivity of the optical lens and further improving the imaging quality.

0.5<f1/f<0.9；

wherein f1 is the focal length of the first lens, and f is the effective focal length of the optical lens.

Satisfying the above relation is beneficial to configuring the positive refractive power of the first lens element within a reasonable range, so as to improve the aberration correcting capability of the optical lens, reduce the sensitivity of the first lens element, and avoid the requirement of excessively high tolerance. In addition, satisfying above-mentioned relational expression still is favorable to eliminating aberration spherical aberration, promotes optical lens's imaging quality obtains good resolving power.

3.5<et2/|sag22|<6；

wherein et2 is the distance between the maximum effective radius of the object side surface of the second lens and the maximum effective radius of the image side surface of the second lens in the optical axis direction (i.e. the edge thickness of the second lens), and sag22 is the distance between the intersection point of the image side surface of the second lens and the optical axis and the maximum effective radius of the image side surface of the second lens in the optical axis direction (i.e. the rise of the image side surface of the second lens).

The above relational expression is satisfied, the edge thickness and the image side rise of the second lens are restrained favorably, the light of the edge field of view is ensured to be transited smoothly at a smaller deflection angle, so that the imaging quality of the optical lens is improved, meanwhile, the relational expression is satisfied, the sensitivity of the second lens is reduced favorably, the requirement of overhigh tolerance is avoided, and the processing feasibility is improved.

1<(r11+r52)/f<2.5；

wherein r11 is a curvature radius of an object side surface of the first lens, r52 is a curvature radius of an image side surface of the fifth lens, and f is an effective focal length of the optical lens.

By reasonably constraining the ratio of the sum of the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the fifth lens to the effective focal length of the optical lens, astigmatism and coma of the middle lens group (namely, the second lens, the third lens and the fourth lens) can be effectively balanced, and the optical lens is ensured to obtain good imaging quality. In addition, the sensitivity of the optical lens can be reduced by satisfying the relational expression, and the processing feasibility of the first lens and the fifth lens is ensured.

In a second aspect, the present invention discloses a camera module, which includes an image sensor and the optical lens of the first aspect, wherein the image sensor is disposed on the image side of the optical lens.

The camera module with the optical lens can shoot clear local detail information of a macro object, high-quality detail imaging quality is obtained, and user experience is improved.

In a third aspect, the present invention discloses an electronic device, which includes a housing and the camera module set according to the second aspect, wherein the camera module set is disposed on the housing.

The electronic equipment with the camera module can clearly shoot local details of a shot object while realizing miniaturization and portability, and provides higher macro imaging quality, so that a user can shoot different microscopic worlds to obtain better experience.

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

the application provides an optical lens, module and electronic equipment make a video recording, this optical lens is satisfying under the circumstances of miniaturized design requirement, when light enters into first lens, utilizes first lens to provide positive refractive power for optical lens to make optical lens have the ability of sufficient convergent light, and then make optical lens obtain sufficient relative illuminance, in order to improve optical lens's image quality. The second lens element with negative refractive power is used for correcting distortion, aberration and astigmatism generated by the front lens element (i.e. the first lens element), and the second lens element is used for matching with the rear lens element (i.e. the third lens element, the fourth lens element and the fifth lens element) to realize aberration balance of the optical lens, so that the resolving power of the optical lens is further improved, and the imaging quality of the optical lens is improved. Further, because the image side surface of the fifth lens is concave at the paraxial region, the external field light can obtain a smaller deflection angle, and at the moment, the light can be incident on the imaging surface of the optical lens at a more reasonable angle, so that the optical lens can be better adapted to the image sensor, and a high-quality imaging effect can be obtained. By adopting the refractive power and the surface type configuration, the small-field-angle shooting is favorably realized, and the light rays in a small angle can be conveniently and stably converged into the optical lens, so that the imaging quality of the optical lens is improved. Meanwhile, the optical lens satisfies the relation: 0.4< ImgH/ObjH <1.2, and controlling the relational expression in the above range enables the optical lens to obtain a larger effective focal length and magnification under the condition of limited spatial layout, so that the optical lens has a macro shooting function, and a user using the camera module and the electronic device with the optical lens can have better macro shooting experience.

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 light ray 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 light ray 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 light ray 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 light ray 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 light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 11 is a schematic structural diagram of an optical lens disclosed in a sixth embodiment of the present application;

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

fig. 13 is a schematic structural diagram of the camera module disclosed in the present application;

fig. 14 is a schematic structural diagram of an electronic device disclosed in the present application.

Icon: o, an optical axis; l1, first lens; 11. an object side surface of the first lens; 12. an image side surface of the first lens; l2, second lens; 21. an object side surface of the second lens; 22. an image side surface of the second lens; l3, third lens; 31. an object side surface of the third lens; 32. an image side surface of the third lens; l4, fourth lens; 41. an object-side surface of the fourth lens; 42. an image side surface of the fourth lens; l5, fifth lens; 51. an object-side surface of the fifth lens; 52. an image-side surface of the fifth lens element; 60. a right-angle prism; 61. an incident surface; 62. a reflective surface; 63. an exit surface; 70. an optical filter; 100. an optical lens; 101. an imaging plane; 102. a diaphragm; 200. a camera module; 201. an image sensor; 300. an electronic device.

Detailed Description

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

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

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

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

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

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

Referring to fig. 1, according to a first aspect of the present application, an optical lens 100 is disclosed, the optical lens 100 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5, which are disposed in order from an object side to an image side along an optical axis O. The first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive or negative refractive power, the fourth lens element L4 has positive or negative refractive power, and the fifth lens element L5 has positive or negative refractive power. During imaging, light enters the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 in sequence from the object side of the first lens L1, and is finally imaged on the imaging surface of the optical lens 100.

Further, the object-side surface 11 of the first lens element L1 is convex at the paraxial region O and convex or concave at the circumference, and the image-side surface 12 of the first lens element L1 is convex or concave at the paraxial region O and convex or concave at the circumference; the object-side surface 21 of the second lens element L2 is convex or concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 22 of the second lens element L2 is concave at the paraxial region O and convex or concave at the circumference; the object-side surface 31 of the third lens element L3 is convex or concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 32 of the third lens element L3 is convex or concave at the paraxial region O and convex or concave at the circumference; the object-side surface 41 of the fourth lens element L4 is convex or concave at the paraxial region O and convex or concave at the circumference, and the image-side surface 42 of the fourth lens element L4 is convex or concave at the paraxial region O and convex or concave at the circumference; the object-side surface 51 of the fifth lens element L5 is convex or concave at a paraxial region O and convex or concave at a peripheral region, and the image-side surface 52 of the fifth lens element L5 is concave at a paraxial region O and convex or concave at a peripheral region.

In some embodiments, when the optical lens 100 is applied to an electronic device such as a smartphone and an electronic watch, the material of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 may be selected to be plastic, so that the complex surface shape of the lenses can be easily processed while the optical lens 100 is light and thin. It is understood that in some other embodiments, a glass material may be used if desired, and the embodiment is not particularly limited.

In some embodiments, the optical lens 100 further includes a right-angle prism 60, and the right-angle prism 60 is located between the object plane of the optical lens 100 and the object-side surface of the first lens L1. The rectangular prism 60 includes an incident surface 61, a reflecting surface 62, and an exit surface 63, and the exit surface 63 is disposed toward the image side. The light enters the rectangular prism 60 from the incident surface 61 of the rectangular prism 60, is reflected by the reflecting surface 62, exits from the exit surface 63 of the rectangular prism 60, and enters the first lens L1.

By additionally arranging the 60-degree-angle prism between the object plane of the optical lens 100 and the first lens L1, the overall length of the optical lens 100 can be reduced while the requirements of a large effective focal length and a small field angle are met, and the optical lens 100 can be designed in a small size.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop 102 and/or a field stop 102, which may be disposed between the right angle prism 60 and the first lens L1. By way of example, the diaphragm 102 can be arranged between the exit surface 63 of the rectangular prism 60 and the object-side surface 11 of the first lens L1. It is understood that the diaphragm 102 may be disposed between other lenses in other embodiments, and is adjusted according to actual needs, and the embodiment is not limited in particular.

Optionally, in order to improve the imaging quality, the optical lens 100 further includes an optical filter 70, and the optical filter 70 is disposed between the fifth lens L5 and the imaging surface 101 of the optical lens 100. It can be understood that the optical filter 70 can be selected as the infrared cut-off filter 70, the infrared cut-off filter 70 is selected, and the imaging quality of the optical lens 100 can be improved by filtering infrared light, so that the imaging better conforms to the visual experience of human eyes. It is understood that the optical filter 70 may be made of an optical glass coating film, or may be made of colored glass, or the optical filter 70 made of other materials may be selected according to actual needs, and is not particularly limited in this embodiment.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.4<ImgH/ObjH<1.2；

wherein ImgH is the radius of the maximum effective imaging circle of the optical lens 100, and ObjH is half of the height of the object corresponding to the maximum effective imaging circle of the optical lens 100. The optical lens 100 satisfies the above relation, which is beneficial for the optical lens 100 to obtain the maximum effective focal length and the better magnification, and can realize the clear local detail information of the macro object, and help the user to obtain better macro shooting experience.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.5<ip/op<2.5；

5mm≤op≤20mm；

where ip is the distance from the image plane 101 of the optical lens 100 to the exit plane 63 of the rectangular prism 60, and op is the distance from the object plane of the optical lens 100 to the entrance plane 61 of the rectangular prism 60. When satisfying above-mentioned relational expression, be favorable to realizing the macro shooting of object distance from 5mm to 20mm within range, simultaneously, can make optical lens 100 have under the prerequisite of the magnification of great effective focal length, realize the miniaturization to adapt to the demand of miniature camera module and small-size electronic equipment.

In some embodiments, the optical lens 100 satisfies the following relationship:

2.4<EPD/sd22<3；

EPD is the entrance pupil diameter of the optical lens 100, and sd22 is half of the maximum effective aperture of the image-side surface 22 of the second lens L2. Through the ratio of the entrance pupil diameter of the optical lens 100 to the maximum effective half aperture of the image side surface 22 of the second lens L2, the optical lens 100 can be ensured to have enough light entering amount under the condition of macro photography, so that a user can shoot local details of more objects when the macro photography is carried out, and the imaging quality is higher on the premise of realizing larger effective focal length and magnification, and the user experience is improved.

In some embodiments, the optical lens 100 satisfies the following relationship:

tan(semiFOV)<0.2；

where semiFOV is the half field angle of the optical lens 100. The small angle of view contributes to an improvement in the effective focal length and the magnification of the optical lens 100, and when the above relational expressions are satisfied, the optical lens 100 can be made to have a characteristic of a large effective focal length (i.e., a telephoto characteristic) and a characteristic of a large magnification. The long-focus characteristic can enable the optical lens 100 to obtain a large depth of field range and a large focal depth range, and can realize rapid capture of a local part of a shot object; the large magnification ratio can realize the magnification effect on the tiny details, so that the optical lens 100 can clearly shoot the local part of the shot object. Because the optical lens 100 effectively combines the telephoto characteristic and the large magnification, when shooting a macro object, fast focusing can be achieved to quickly capture the local range of the object to be shot, and the local range is enlarged to achieve clear shooting of the macro object. Therefore, the optical lens 100 can achieve fast focusing on a macro object and obtain a high-quality imaging effect, so as to improve the user experience.

In some embodiments, the optical lens 100 satisfies the following relationship:

1.4<ct15/BFL<2；

wherein ct15 is the distance between the object-side surface 11 of the first lens element L1 and the image-side surface 52 of the fifth lens element L5 on the optical axis O, and BFL is the minimum distance between the image-side surface 52 of the fifth lens element L5 and the image plane 101 of the optical lens 100 on the optical axis O. By reasonably configuring the ratio of the thickness of part of the lenses of the optical lens 100 to the back focus, that is, the ratio of the thickness of the object-side surface 11 of the first lens L1 and the image-side surface 52 of the fifth lens L5 on the optical axis O to the back focus is within the range of the above relational expression, it is beneficial to realize a larger effective focal length and a larger magnification, so that the optical lens 100 has a larger focusing range in the debugging process, and in addition, satisfying the above relational expression is also beneficial to obtaining a back focus long enough to ensure that the optical lens 100 finds the best focus.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.5<ct23/ct45<1.6；

here, ct23 is the distance between the image-side surface 22 of the second lens L2 and the object-side surface 31 of the third lens L3 on the optical axis O, and ct45 is the distance between the image-side surface 42 of the fourth lens L4 and the object-side surface 51 of the fifth lens L5 on the optical axis O. When the above relational expressions are satisfied, it is advantageous to obtain appropriate distances between the second lens L2 and the third lens L3, and between the fourth lens L4 and the fifth lens L5, to achieve the effects of a small angle of field and a large magnification. Meanwhile, satisfying the above relation is beneficial to slowing down the light deflection, adjusting the field curvature of the optical lens 100, reducing the sensitivity, and then obtaining better imaging quality. In addition, the relation is satisfied, the processing and assembling characteristics can be ensured, and the problems of large molding difficulty, easy assembly deformation and the like caused by interference of front and rear lenses and over-thin lenses in the assembling process due to over-small gaps are avoided.

In some embodiments, the optical lens 100 satisfies the following relationship:

-1.9<f2/(f12-f345)<-0.2；

where f2 is the focal length of the second lens L2, f12 is the combined focal length of the first lens L1 and the second lens L2, and f345 is the combined focal length of the third lens L3, the fourth lens L4, and the fifth lens L5. By reasonably configuring the refractive power of each lens, the focal length of each lens meets the requirement of the above relation, which is beneficial to balancing the aberration of the optical lens 100, reducing the sensitivity of the optical lens 100, and further improving the imaging quality.

In some embodiments, the optical lens 100 satisfies the following relationship:

0.5<f1/f<0.9；

where f1 is the focal length of the first lens L1, and f is the effective focal length of the optical lens 100. When the above relationship is satisfied, it is advantageous to configure the positive refractive power of the first lens element L1 within a reasonable range, so as to improve the aberration correction capability of the optical lens system 100, reduce the sensitivity of the first lens element L1, and avoid the requirement of excessively high tolerance. In addition, satisfying the above relational expression is also beneficial to eliminating aberration spherical aberration, improving the imaging quality of the optical lens 100, and obtaining good resolving power.

In some embodiments, the optical lens 100 satisfies the following relationship:

3.5<et2/|sag22|<6；

et2 is the distance from the maximum effective radius of the object-side surface 21 of the second lens L2 to the maximum effective radius of the image-side surface 22 of the second lens L2 in the direction of the optical axis O (i.e., the edge thickness of the second lens L2), and sag22 is the distance from the intersection point of the image-side surface 22 of the second lens L2 and the optical axis O to the maximum effective radius of the image-side surface 22 of the second lens L2 in the direction of the optical axis O (i.e., the rise of the image-side surface of the second lens). When the above relational expression is satisfied, it is beneficial to constrain the edge thickness and the rise of the image side surface 22 of the second lens L2, and it is ensured that the light rays of the edge field of view smoothly transition at a smaller deflection angle, so as to improve the imaging quality of the optical lens 100, and at the same time, satisfying the above relational expression helps to reduce the sensitivity of the second lens L2, avoid an excessively high tolerance requirement, and improve the processing feasibility. When the ratio is lower than the lower limit, the edge thickness of the second lens L2 is too small, so that the uniformity of the second lens L2 is reduced, which is not favorable for the molding processing of the lens; when the ratio exceeds the upper limit, the rise of the image-side surface 22 of the second lens element L2 is too small, which is not favorable for smooth transition of light, and the aberration correction capability of the optical lens 100 is reduced, so that good imaging quality cannot be ensured.

In some embodiments, the optical lens 100 satisfies the following relationship:

1<(r11+r52)/f<2.5；

where r11 is the radius of curvature of the object-side surface 11 of the first lens L1, r52 is the radius of curvature of the image-side surface 52 of the fifth lens L5, and f is the effective focal length of the optical lens 100. By reasonably constraining the ratio of the sum of the curvature radii of the object-side surface 11 of the first lens L1 and the image-side surface 52 of the fifth lens L5 to the effective focal length of the optical lens 100, astigmatism and coma of the middle lens group (i.e., the second lens L2, the third lens L3 and the fourth lens L4) can be effectively balanced, and the optical lens 100 is ensured to obtain good imaging quality. In addition, satisfying the above relation also reduces the sensitivity of the optical lens 100, ensuring the processing feasibility of the first lens L1 and the fifth lens L5. When the ratio is lower than the lower limit, the image-side surface 52 of the fifth lens L5 is too curved, so that the sensitivity is increased, the lens is not easy to machine and form, and the production cost is increased; when the upper limit is exceeded, the aberration correction capability of the face type of the fifth lens element L5 is weakened, and the effective focal length that the optical lens 100 can achieve is reduced, which affects the performance of the optical lens 100 and degrades the imaging quality.

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

First embodiment

A schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application is shown in fig. 1, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, where the rectangular prism 60 and the filter 70 are both made of glass, and the first lens L1 to the fifth lens L5 are all made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has positive refractive power, and the fifth lens element L5 has negative refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave at the circumference, respectively.

Specifically, taking as an example that the effective focal length f of the optical lens 100 is 5.440mm, the aperture size FNO is 3.71, the field angle FOV of the optical lens 100 is 22.161 °, and the total length TTL of the optical lens 100 is 12.200mm, the other parameters of the optical lens 100 are given in 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, surface numbers 5 and 6 correspond to the object side surface and the image side surface of the first lens L1, respectively. The radius Y in table 1 is the radius of curvature of the object-side surface or the image-side surface of the corresponding surface number at the optical axis O. The first value in the "thickness" parameter list of a lens is the thickness of the lens on the optical axis O, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis O. The numerical value of the stop 102 in the "thickness" parameter column is the distance on the optical axis O from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis O), the direction from the object side surface to the image side surface of the last lens of the first lens L1 is defined as the positive direction of the optical axis O, when the value is negative, it indicates that the stop 102 is disposed on the right 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 left side of the vertex of the next surface. It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm. And the reference wavelength of the refractive index and Abbe number in Table 1 is 587.6nm, and the reference wavelength of the focal length is 555 nm.

In the first embodiment, the object-side surface and the image-side surface of any one of the first lens L1 through the fifth lens L5 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 O direction; c is the curvature at the optical axis O of the aspheric surface, c ═ 1/Y (i.e., paraxial curvature c is the inverse of the radius of curvature Y in table 1); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the first embodiment.

TABLE 1

TABLE 2

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

Referring to fig. 2 (B), fig. 2 (B) is a diagram of astigmatism of light of the optical lens 100 in the first embodiment at a wavelength of 555 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent a meridional image plane 101 curvature T and a sagittal image plane 101 curvature S, and as can be seen from (B) in fig. 2, astigmatism of the optical lens 100 is well compensated at this wavelength.

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

Second embodiment

A schematic structural diagram of an optical lens 100 disclosed in the second embodiment of the present application is shown in fig. 3, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, wherein the rectangular prism 60 and the filter 70 are made of glass, and the first lens L1 to the fifth lens L5 are made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has positive refractive power, and the fifth lens element L5 has negative refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are both convex at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are both convex at the optical axis O, and the object-side surface 31 and the image-side surface 31 of the third lens element L3 are convex and concave at the circumference, respectively; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave at the circumference, respectively.

Specifically, taking the effective focal length f of the optical lens 100 as 4.857mm, the aperture size FNO as 3.71, the field angle FOV of the optical lens 100 as 22.110 °, and the total length TTL of the optical lens 100 as 14.140mm as examples, other parameters of the optical lens 100 are given in table 3 below, and definitions of the parameters can be found 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 3 are all mm, and the reference wavelength of the refractive index and the abbe number in table 3 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the second embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the fifth lens element L5 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 4 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the second embodiment.

TABLE 3

TABLE 4

Referring to fig. 4, as can be seen from the light spherical aberration diagram (a) in fig. 4, the light astigmatism diagram (B) in fig. 4, and the distortion diagram (C) in fig. 4, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 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

A schematic structural diagram of an optical lens 100 disclosed in the third embodiment of the present application is shown in fig. 5, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, where the rectangular prism 60 and the filter 70 are both made of glass, and the first lens L1 to the fifth lens L5 are all made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has positive refractive power, and the fifth lens element L5 has negative refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are both convex at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are both convex at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are concave at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave at the circumference, respectively.

Specifically, taking the effective focal length f of the optical lens 100 as 5.556mm, the aperture size FNO as 3.71, the field angle FOV of the optical lens 100 as 22.119 °, and the total length TTL of the optical lens 100 as 12.500mm as examples, other parameters of the optical lens 100 are given in table 5 below, and the definitions of the parameters can be found 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 in table 5 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the third embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the fifth lens element L5 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 6 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the third embodiment.

TABLE 5

TABLE 6

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

Fourth embodiment

A schematic structural diagram of an optical lens 100 disclosed in the fourth embodiment of the present application is shown in fig. 7, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, where the rectangular prism 60 and the filter 70 are both made of glass, and the first lens L1 to the fifth lens L5 are all made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has negative refractive power, the fourth lens element L4 has positive refractive power, and the fifth lens element L5 has negative refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave at the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave at the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are respectively convex and concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are convex on the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are concave and convex on the circumference, respectively; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are convex and concave at the circumference, respectively.

Specifically, taking the effective focal length f of the optical lens 100 as 5.556mm, the aperture size FNO as 3.71, the field angle FOV of the optical lens 100 as 22.119 °, and the total length TTL of the optical lens 100 as 12.500mm as examples, other parameters of the optical lens 100 are given in table 7 below, and definitions of the parameters can be found 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 in table 7 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the fourth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the fifth lens element L5 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 8 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the fourth embodiment.

TABLE 7

TABLE 8

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

Fifth embodiment

A schematic structural diagram of an optical lens 100 disclosed in the fifth embodiment of the present application is shown in fig. 9, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, where the rectangular prism 60 and the filter 70 are both made of glass, and the first lens L1 to the fifth lens L5 are all made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has negative refractive power, and the fifth lens element L5 has positive refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are convex at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave along the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave along the circumference; the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex at the optical axis O, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are convex at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are both concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively concave and convex at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are respectively convex and concave at the circumference.

Specifically, taking the effective focal length f of the optical lens 100 as 6.607mm, the aperture size FNO as 3.71, the field angle FOV of the optical lens 100 as 22.208 °, and the total length TTL of the optical lens 100 as 12.200mm as examples, other parameters of the optical lens 100 are given in table 9 below, and definitions of the parameters can be found 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 9 are mm, and the reference wavelength of the refractive index and the abbe number in table 9 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the fifth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the fifth lens element L5 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 10 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the fifth embodiment.

TABLE 9

Watch 10

Referring to fig. 10, as can be seen from the light spherical aberration diagram (a) in fig. 10, the light astigmatism diagram (B) in fig. 10, and the distortion diagram (C) in fig. 10, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 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.

Sixth embodiment

A schematic structural diagram of an optical lens 100 disclosed in a sixth embodiment of the present application is shown in fig. 11, in which the optical lens 100 includes, in order from an object side to an image side along an optical axis O, a rectangular prism 60, a stop 102, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a filter 70, where the rectangular prism 60 and the filter 70 are both made of glass, and the first lens L1 to the fifth lens L5 are all made of plastic.

Further, the first lens element L1 has positive refractive power, the second lens element L2 has negative refractive power, the third lens element L3 has positive refractive power, the fourth lens element L4 has positive refractive power, and the fifth lens element L5 has negative refractive power. The object-side surface 11 and the image-side surface 12 of the first lens element L1 are both convex at the optical axis O, and the object-side surface 11 and the image-side surface 12 of the first lens element L1 are respectively convex and concave at the circumference; the object-side surface 21 and the image-side surface 22 of the second lens element L2 are both concave along the optical axis O, and the object-side surface 21 and the image-side surface 22 of the second lens element L2 are respectively convex and concave along the circumference; the object-side surface 31 and the image-side surface of the third lens element L3 are respectively concave and convex at the optical axis O of 32, and the object-side surface 31 and the image-side surface 32 of the third lens element L3 are both concave at the circumference; the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are respectively convex and concave at the optical axis O, and the object-side surface 41 and the image-side surface 42 of the fourth lens element L4 are both convex at the circumference; the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the optical axis O, and the object-side surface 51 and the image-side surface 52 of the fifth lens element L5 are both concave at the circumference.

Specifically, taking the effective focal length f of the optical lens 100 as 6.860mm, the aperture size FNO as 2.90, the field angle FOV of the optical lens 100 as 22.135 °, and the total length TTL of the optical lens 100 as 12.200mm as examples, other parameters of the optical lens 100 are given in table 11 below, and definitions of the parameters can be found 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 11 are mm, and the reference wavelength of the refractive index and the abbe number in table 11 is 587.6nm, and the reference wavelength of the focal length is 555 nm. In the sixth embodiment, the object-side surface and the image-side surface of any one of the first lens element L1 to the fifth lens element L5 are aspheric, and the method for calculating the surface shape x of each aspheric lens can be found in the description of the foregoing embodiments, which is not repeated herein. Table 12 below shows the high-order term coefficients a4, a6, A8, a10, a12, a14, a16, a18, and a20 that can be used for each aspherical mirror surface in the sixth embodiment.

TABLE 11

TABLE 12

Referring to fig. 12, as can be seen from the light spherical aberration diagram (a) in fig. 12, the light astigmatism diagram (B) in fig. 12, and the distortion diagram (C) in fig. 12, the longitudinal spherical aberration, astigmatism, and distortion of the optical system 100 are well controlled, so that the optical system 100 of this embodiment has good imaging quality. In addition, as for the wavelengths corresponding to the curves in fig. 12 (a), fig. 12 (B), and fig. 12 (C), 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 13, table 13 summarizes the ratios of the relations in the first embodiment to the sixth embodiment of the present application.

Watch 13

Referring to fig. 13, the present application further discloses a camera module 200, where the camera module 200 includes an image sensor 201 and the optical lens 100 according to any of the first to sixth embodiments, the image sensor 201 is disposed at an image side of the optical lens 100, and the image sensor 201 is configured to convert an optical signal corresponding to a subject into an image signal, which is not described herein again. It can be understood that the camera module 200 with the optical lens 100 can capture clear local detail information of a macro object, obtain high-quality detail imaging quality, and improve user experience.

Referring to fig. 14, the present application further discloses an electronic device 300, wherein the electronic device 300 includes a housing and the camera module 200 as described above, and the camera module 200 is disposed on the housing. The electronic device 300 may be, but is not limited to, a cell phone, a tablet, a laptop, a smart watch, a monitor, and the like. It can be understood that the electronic device 300 with the camera module 200 can clearly shoot the local details of the object while realizing miniaturization and portability, and provide higher macro imaging quality, so that the user can shoot different micro-worlds to obtain better experience.

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 includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged in this order from an object side to an image side along an optical axis;

the third lens element with refractive power;

the fourth lens element with refractive power;

the optical lens satisfies the following relation:

0.4<ImgH/ObjH<1.2；

2. An optical lens according to claim 1, characterized in that the optical lens further comprises a right-angle prism located between an object plane of the optical lens and the first lens, the right-angle prism comprising an incident plane, an exit plane, and a reflecting plane connected to the incident plane and the exit plane, the exit plane being disposed toward an image side, the optical lens satisfying the following relation:

0.5<ip/op<2.5；

5mm≤op≤20mm；

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

2.4<EPD/sd22<3；

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

1.4<ct15/BFL<2；

wherein ct15 is a distance between an object-side surface of the first lens element and an image-side surface of the fifth lens element on the optical axis, and BFL is a minimum distance between the image-side surface of the fifth lens element and an image plane of the optical lens element on the optical axis.

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

0.5<ct23/ct45<1.6；

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

-1.9<f2/(f12-f345)<-0.2；

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

0.5<f1/f<0.9；

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

3.5<et2/|sag22|<6；

et2 is a distance from the maximum effective radius of the object-side surface of the second lens to the maximum effective radius of the image-side surface of the second lens in the optical axis direction, and Sag22 is a distance from the intersection point of the image-side surface of the second lens and the optical axis to the maximum effective radius of the image-side surface of the second lens in the optical axis direction.

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

1<(r11+r52)/f<2.5；

wherein r11 is a radius of curvature of an object-side surface of the first lens element at the optical axis, and r52 is a radius of curvature of an image-side surface of the fifth lens element at the optical axis.

10. The utility model provides a module of making a video recording which characterized in that: the camera module comprises an image sensor and an optical lens according to any one of claims 1 to 9, wherein the image sensor is arranged on the image side of the optical lens.

11. An electronic device, characterized in that: the electronic device comprises a housing and the camera module of claim 10, the camera module being disposed on the housing.