WO2022099820A1

WO2022099820A1 - Optical lens and lens module

Info

Publication number: WO2022099820A1
Application number: PCT/CN2020/133016
Authority: WO
Inventors: 王海龙
Original assignee: 诚瑞光学(深圳)有限公司
Priority date: 2020-11-12
Filing date: 2020-12-01
Publication date: 2022-05-19
Also published as: CN212135040U

Abstract

Provided are an optical lens (110) and a lens module (10), the optical lens (110) comprising an optical part (1) used for imaging and a supporting abutting part (2) arranged around the optical part, the support part (2) comprises an object-side supporting abutting face (21) adjacent to the object side and an image-side supporting abutting face (22) arranged opposite to the object-side supporting abutting face (21), and the object-side supporting abutting face (21) and/or the image-side supporting abutting face (22) are provided with at least two recesses (24) distributed sequentially in the radial direction of the optical lens (110); the object-side supporting abutting face (21) comprises an object-side abutting face (211) connected to the optical part (1) the image-side supporting abutting face (22) comprises an image-side abutting face (221) connected to the optical part (1), two adjacent recesses (24) are spaced apart to form an end face, the object-side abutting face (211) on the same side as the end face is flush with the end face, and the image-side abutting face (221) on the same side as the end face is flush with the end face. Thus the optical lens (110) can reduce stray light caused by a long supporting abutting part without affecting the flatness of the object-side supporting abutting face (21) and/or the image-side supporting abutting face (22), improving the imaging quality of the optical lens (110).

Description

Optical lenses and lens modules

technical field

The present application relates to the technical field of optical imaging, and in particular, to an optical lens and a lens module.

Background technique

With the continuous development of science and technology, electronic devices are constantly developing towards intelligence. In addition to digital cameras, portable electronic devices such as tablet computers, mobile phones, etc. are also equipped with camera modules to meet the needs of users to take pictures at any time. .

The lens module mainly includes a lens barrel and a lens assembly arranged in the lens barrel. The lens assembly usually includes a plurality of optical lenses arranged in sequence from the object side to the image side. The optical lenses include an optical part and a supporting part. The adjacent optical lenses and between the optical lenses and the lens barrel are fixedly connected through the supporting part. If The supporting part of some optical lenses is too long, and the stray light irradiating the supporting part will increase, which is easy to cause the lens module to produce flaring light (Flare), which affects the imaging quality of the lens module. The bearing surface is roughened to reduce stray light. Although this method can effectively eliminate light, it also reduces the flatness of the bearing surface, which affects the stability and accuracy of the lens module assembly.

Therefore, it is necessary to provide an optical lens and a lens module which can not only reduce the stray light caused by the excessively long bearing part, but also do not reduce the flatness of the bearing surface.

technical problem

The first objective of the present application is to provide an optical lens, so as to solve the technical problem of reducing the flatness of the bearing surface when eliminating the stray light generated by the excessively long bearing portion of the existing optical lens.

technical solutions

The technical solution provided by the first object of the present application is as follows: to provide an optical lens, which includes an optical part for imaging and a bearing part arranged around the optical part, the bearing part includes an object close to the object side A side bearing surface, an image-side bearing surface disposed opposite to the object-side bearing surface, and a peripheral surface connecting the object-side bearing surface and the image-side bearing surface, the object-side bearing surface and /or the image-side bearing surface is provided with at least two grooves sequentially distributed along the radial direction of the optical lens;

The object-side bearing surface includes an object-side abutting surface connecting the optical parts, the image-side bearing surface includes an image-side abutting surface connecting the optical parts, and between two adjacent grooves An end surface is formed at intervals, the object-side abutting surface on the same side as the end surface is flush with the end surface, and the image-side abutting surface on the same side as the end surface is flush with the end surface.

Preferably, the object-side bearing surface is provided with at least three grooves that are sequentially distributed along the radial direction of the optical lens, and any radially adjacent two grooves on the object-side bearing surface equal distances between; or,

The image-side bearing surface is provided with at least three grooves sequentially distributed along the radial direction of the optical lens, and the gap between any radially adjacent two grooves on the image-side bearing surface is equal distances.

Preferably, the groove is a closed annular annular groove; or,

The groove includes a plurality of sub-grooves arranged at intervals along the circumferential direction of the optical lens.

Preferably, the inner surface of the groove is a surface formed by roughening treatment.

Preferably, the object-side bearing surface and/or the image-side bearing surface is further provided with a light absorbing layer.

Preferably, the light-absorbing layer is a coating formed on the entire object-side bearing surface and/or the entire image-side bearing surface using a black light-absorbing substance.

The present application also provides a lens module, which includes a lens barrel and a lens assembly disposed in the lens barrel, the lens assembly includes a first lens, and the first lens is the optical lens described in any one of the above lens.

Preferably, the lens assembly further comprises a first shading plate, a first shading plate and a second lens, the second lens is arranged on the object side of the first lens, the first shading plate and the first shading plate It is arranged between the first lens and the second lens, and the second lens, the first shading plate, the first shading plate and the first lens are arranged in order from the object side to the image side.

Preferably, the lens assembly further comprises a second shading plate, a second shading plate, a third shading plate and a third lens, the third lens is arranged on the image side of the first lens, and the second shading plate , The second shading sheet and the third shading sheet are all arranged between the first lens and the third lens, and from the object side to the image side are the first lens, the second shading sheet, the The second shading plate, the third shading sheet and the third lens.

Preferably, the lens assembly further includes a fourth shading sheet, a fifth shading sheet, a fourth lens and a fifth lens, and the fourth and fifth lenses are both disposed on the object side of the second lens and The fifth lens is disposed between the fourth lens and the second lens, the fourth light shielding sheet is disposed between the fourth lens and the fifth lens, and the fifth light shielding sheet is disposed between the fifth lens and the second lens; and/or,

The lens module further includes a pressing ring for fixing the lens assembly in the lens barrel, the pressing ring is arranged in the lens barrel and is connected with the inner side wall of the lens barrel.

beneficial effect

The beneficial effects of the present application are: the optical lens provided by the present application can realize the imaging of the optical lens by arranging the optical part, and the supporting part is arranged around the optical part to facilitate the fixing of the optical lens; when the supporting part of the optical lens is too long, By arranging at least two grooves on the object-side bearing surface and/or the image-side bearing surface, which are sequentially distributed along the radial direction of the optical lens, the stray light directed to the bearing portion will irradiate on the inner surface of the groove and be refracted. and emission, since there are multiple grooves, the stray light directed to the bearing part can be refracted and reflected multiple times through the inner surface of the multiple grooves, gradually absorbing the stray light, preventing the stray light from passing through the optical lens and causing the lens The mod produces Flare. An object-side end face flush with the object-side abutting surface or an image-side end face flush with the image-side abutting face is formed between two adjacent grooves, because the object-side end face is flush with the object-side abutting face, The image-side end surface is flush with the image-side abutting surface, so it will not change the flatness of the object-side bearing surface and/or the image-side bearing surface, so it will not affect the assembly of the optical lens, that is, it will not reduce the optical Lens assembly stability and accuracy. Therefore, the optical lens provided by the present application can reduce the stray light caused by the excessively long bearing portion without affecting the flatness of the object-side bearing surface and/or the image-side bearing surface, thereby improving the imaging of the optical lens quality.

Description of drawings

1 is a top view of a first optical lens provided in an embodiment of the application;

Fig. 2 is a sectional view along A-A in Fig. 1;

Fig. 3 is a partial enlarged view at B in Fig. 2;

FIG. 4 is a top view of a second optical lens provided in an embodiment of the application;

FIG. 5 is a cross-sectional view of a lens module provided by an embodiment of the present application.

In the figure: 10, lens module; 110, optical lens; 1, optical part; 2, bearing part; 21, object side bearing surface; 211, object side abutting surface; 212, object side end face; 22, image side bearing surface; 221, image side abutting surface; 23, peripheral surface; 24, groove; 241, sub-groove; 25, light absorbing layer; 100, lens assembly; 110', first lens; 120, second lens; 130, third lens; 140, fourth lens; 150, fifth lens; 210, first shading plate; 220, second shading plate; 310, first shading plate; 320, second shading plate; 330, The third shading sheet; 340, the fourth shading sheet; 350, the fifth shading sheet; 400, the lens barrel; 500, the pressure ring.

Embodiments of the present invention

The present application will be described in detail below with reference to FIGS. 1 to 5 .

Referring to FIGS. 1 to 4 , the optical lens 110 provided in the embodiment of the present application includes an optical part 1 for imaging and a bearing part 2 arranged around the optical part 1 , and the bearing part 2 includes an object side bearing close to the object side The surface 21, the image-side bearing surface 22 disposed opposite to the object-side bearing surface 21, and the peripheral surface 23 connecting the object-side bearing surface 21 and the image-side bearing surface 22. The object-side bearing surface 21 is provided with at least two The grooves 24 are sequentially distributed along the radial direction of the optical lens 110. The object-side abutting surface 21 includes an object-side abutting surface 211 connecting the optical portion 1. Any two adjacent grooves 24 form an abutment on the object side. The surface 211 is flush with the object-side end surface 212 . In this embodiment, the optical lens 110 is imaged through the optical part 1, and is fixed and assembled to the lens module through the supporting part 2 provided around the optical part 1; when the supporting part 2 of the optical lens 110 is too long, that is, In the radial direction of the optical lens 110 , when the length of the end of the optical part 1 close to the bearing part 2 is too large from the peripheral surface 23 , at least two objects are arranged on the bearing surface 21 on the object side distributed in sequence along the radial direction of the optical lens 110 . In the groove 24, the stray light directed to the bearing part 2 will be irradiated on the inner surface of the groove 24 and will be refracted and emitted. The stray light is gradually absorbed by multiple refractions and reflections, which can prevent the stray light from passing through the optical lens 110 to cause the lens module to generate flare light (Flare). In addition, if an object-side end surface 212 is formed between any two adjacent grooves 24, and the object-side end surface 212 is flush with the object-side abutting surface 211 on the same side, then a plurality of objects will be formed between the plurality of grooves 24. The side end surfaces 212, all the object side end surfaces 212 are flush with the object side abutting surface 211, so the flatness of the object side abutting surface 21 of the bearing part 2 will not be changed, and thus the assembly of the optical lens 110 will not be affected. In other words, the assembly stability of the optical lens 110 will not be reduced. Therefore, the optical lens 110 provided by the present application can reduce the stray light caused by the excessively long resting portion 2 without affecting the flatness of the object-side bearing surface 21 , thereby improving the imaging quality of the optical lens 110 . It can be understood that, in other embodiments, at least two grooves 24 distributed in sequence along the radial direction of the optical lens 110 may also be provided on the image-side bearing surface 22 , or, the object-side bearing surface 21 and the image-side bearing surface 21 It is also possible to have at least two grooves 24 distributed in sequence along the radial direction of the optical lens 110 on each of the surfaces 22, wherein the image-side bearing surface 22 includes the image-side abutment surface 221 connecting the optical part 1, and any adjacent two An image-side end surface (not shown) that is flush with the image-side abutting surface 221 is formed between the grooves 24 . The outer circumferential contour shape of the optical lens 110 provided in the embodiment of the present application may be a circle, a square, or any other shape, which is not limited herein.

Preferably, the object-side bearing surface 21 is provided with at least three grooves 24 that are sequentially distributed along the radial direction of the optical lens 110 , and any radially adjacent two grooves 24 on the object-side bearing surface 21 are provided. equal distances. Of course, as another implementation of this embodiment, the distance between any two radially adjacent grooves 24 on the object-side bearing surface 21 may be unequal.

Preferably, the image-side bearing surface 22 is provided with at least three grooves 24 sequentially distributed along the radial direction of the optical lens 110 , and any radially adjacent two grooves 24 on the image-side bearing surface 22 are provided. equal distances. Of course, as another implementation of this embodiment, the distance between any two radially adjacent grooves 24 on the image side bearing surface 22 may be unequal.

Please refer to FIG. 1 again, the groove 24 is a closed annular groove. With this arrangement, the groove wall area of the groove 24 is increased, and the stray light irradiated on the bearing portion 2 can be more effectively refracted and reflected, so the extinction effect is better. It can be understood that, as another implementation of this embodiment, the groove 24 includes a plurality of sub-grooves 241 spaced along the circumferential direction of the optical lens 110 . The area of the end face or the image side end face is larger, the flatness of the optical lens is better, and it is easier to install stably and accurately. Referring to FIG. 4 , some of the grooves 24 are annular grooves, and some of the grooves 24 include a plurality of sub-grooves 241 spaced apart along the circumferential direction of the optical lens 110 .

Please refer to FIG. 2 and FIG. 3 again, the object-side bearing surface 21 is further provided with a light absorbing layer 25 . The light-absorbing layer 25 can effectively absorb light, and is arranged on the object-side bearing surface 21 provided with the grooves 24, and the stray light irradiated on the object-side bearing surface 21 can be enhanced to perform extinction treatment in combination with the grooves 24. Thus, the imaging quality of the lens module can be improved. It can be understood that in other embodiments, the image-side bearing surface 22 may also be provided with a light-absorbing layer 25 , or both the object-side bearing surface 21 and the image-side bearing surface 22 may be provided with a light-absorbing layer 25 .

Preferably, the light-absorbing layer 25 is a coating formed on the entire object-side bearing surface 21 and/or the entire image-side bearing surface 22 by using a black light-absorbing substance. The black light-absorbing material has strong light-absorbing ability. By coating on the entire object-side bearing surface 21 and/or the entire image-side bearing surface 22, it can better and more absorb stray light, which is beneficial to improve the imaging quality of the lens module .

Preferably, the inner surface of the groove 24 is a surface formed by roughening treatment. By roughening the inner surface of the groove, the number of refraction and reflection of stray light can be increased, the ability to absorb stray light can be improved, and the imaging quality of the lens module can be improved. Roughened without affecting the stable and precise installation of optical lenses.

Referring to FIG. 5 , an embodiment of the present application further provides a lens module 10 . The lens module 10 includes a lens barrel 400 and a lens assembly 100 disposed in the lens barrel 400 . The lens assembly 100 includes a first lens 110 ′, and the first lens 110 ′. The lens 110 ′ is the aforementioned optical lens 110 . The straight line O represents the optical axis of the lens module 10 .

In this embodiment, the lens assembly 100 further includes a first shading plate 210, a first shading plate 310 and a second lens 120, the second lens 120 is disposed on the object side of the first lens 110', the first shading plate 210 and the second lens 120 A shading sheet 310 is disposed between the first lens 110' and the second lens 120. From the object side to the image side, there are the second lens 120, the first shading sheet 310, the first shading plate 210 and the first lens 110' in sequence. The first shading plate 210 and the first shading sheet 310 are disposed between the first lens 110 ′ and the second lens 120 , both for blocking stray light. The object-side abutting surface 211 and the object-side end surface 212 are connected to the The first light shielding plate 210 is in contact with the image side contact surface 221 and the image side end surface (not shown) is in contact with the second light shielding plate (see below). Since the object side contact surface 211 It is flush with the object-side end surface 212, and the image-side abutting surface 221 is flush with the image-side end surface (not shown), so that the first lens 110' can be stably and accurately installed on the lens mold. in group 10.

Preferably, the lens assembly 100 further includes a second shading plate 220, a second shading plate 320, a third shading plate 330 and a third lens 130, the third lens 130 is provided on the image side of the first lens 110', and the second shading plate 220, the second shading sheet 320 and the third shading sheet 330 are all disposed between the first lens 110' and the third lens 130, and from the object side to the image side are the first lens 110', the second shading sheet 320, the first lens 110', the second The second shading plate 220 , the third shading plate 330 and the third lens 130 . The second light-shielding plate 220 , the second light-shielding plate 320 and the third light-shielding plate 330 are disposed between the first lens 110 ′ and the third lens 130 , all of which are used to block stray light. The distance between the first lens 110 ′ and the third lens 130 .

Preferably, the lens assembly 100 further includes a fourth lens 340 , a fifth lens 350 , a fourth lens 140 and a fifth lens 150 , and the fourth lens 140 and the fifth lens 150 are both disposed on the object side of the second lens 120 and The fifth lens 150 is disposed between the fourth lens 140 and the second lens 120, the fourth light shielding plate 340 is disposed between the fourth lens 140 and the fifth lens 150, and the fifth light shielding plate 350 is disposed between the fifth lens 150 and the fifth lens 150. Between the two lenses 120 ; the fourth shading sheet 340 and the fifth shading sheet 350 are used to block stray light. In this embodiment, each shading sheet and each shading plate are disposed correspondingly to the bearing portions of adjacent lenses.

In this embodiment, the lens module 10 further includes a pressure ring 500 for fixing the lens assembly 100 in the lens barrel 400 . When assembling the lens module 10 of this embodiment, in the order of the fourth lens 140 , the fifth lens 150 , the second lens 120 , the first lens 110 ′, and the third lens 130 , in the direction from the object side to the image side It is assembled to the lens barrel 400 , and finally, the pressing ring 500 is connected to the lens barrel 400 to realize the fixation of the lens assembly 100 .

The above are only the embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present application, but these belong to the scope of the present application. protected range.

Claims

An optical lens is characterized in that it comprises an optical part for imaging and a bearing part arranged around the optical part, the bearing part comprises an object side bearing surface close to the object side, and the object side bearing surface is close to the object side. An image-side bearing surface arranged opposite to the bearing surface and a peripheral surface connecting the object-side bearing surface and the image-side bearing surface, the object-side bearing surface and/or the image-side bearing surface are provided with at least two grooves sequentially distributed along the radial direction of the optical lens;

The object-side bearing surface includes an object-side abutting surface connecting the optical parts, the image-side bearing surface includes an image-side abutting surface connecting the optical parts, and between two adjacent grooves An end surface is formed at intervals, the object-side abutting surface on the same side as the end surface is flush with the end surface, and the image-side abutting surface on the same side as the end surface is flush with the end surface.
The optical lens according to claim 1, wherein the object-side bearing surface is provided with at least three grooves sequentially distributed along the radial direction of the optical lens, and the object-side bearing surface is provided with any The distance between two radially adjacent grooves is equal; or,

The image-side bearing surface is provided with at least three grooves sequentially distributed along the radial direction of the optical lens, and the gap between any radially adjacent two grooves on the image-side bearing surface is equal distances.
The optical lens according to claim 1, wherein the groove is a closed annular groove; or,

The groove includes a plurality of sub-grooves arranged at intervals along the circumferential direction of the optical lens.
The optical lens according to any one of claims 1 to 3, wherein the inner surface of the groove is a surface formed by roughening treatment.
The optical lens according to claim 4, wherein the object-side bearing surface and/or the image-side bearing surface are further provided with a light absorbing layer.
The optical lens according to claim 5, wherein the light-absorbing layer is a coating formed on the entire object-side bearing surface and/or the entire image-side bearing surface by coating with a black light-absorbing substance .
A lens module, characterized in that it includes a lens barrel and a lens assembly arranged in the lens barrel, the lens assembly includes a first lens, and the first lens is the lens described in any one of claims 1 to 6 of optical lenses.
The lens module according to claim 7, wherein the lens assembly further comprises a first shading plate, a first shading sheet and a second lens, and the second lens is disposed on the object side of the first lens , the first shading plate and the first shading sheet are arranged between the first lens and the second lens, and from the object side to the image side are the second lens, the first shading sheet, the the first shading plate and the first lens.
The lens module according to claim 8, wherein the lens assembly further comprises a second shading plate, a second shading sheet, a third shading sheet and a third lens, and the third lens is provided on the first On the image side of a lens, the second shading plate, the second shading plate and the third shading plate are all arranged between the first lens and the third lens, from the object side to the image side are the first A lens, the second shading sheet, the second shading plate, the third shading sheet and the third lens.
The lens module according to claim 9, wherein the lens assembly further comprises a fourth shading sheet, a fifth shading sheet, a fourth mirror and a fifth mirror, the fourth mirror and the fifth mirror They are both arranged on the object side of the second mirror, the fifth mirror is arranged between the fourth mirror and the second mirror, and the fourth shading plate is arranged between the fourth mirror and the first mirror. Between the five lenses, the fifth shading sheet is provided between the fifth lens and the second lens; and/or,

The lens module further includes a pressing ring for fixing the lens assembly in the lens barrel, the pressing ring is arranged in the lens barrel and is connected with the inner side wall of the lens barrel.