WO2021097881A1

WO2021097881A1 - Lens module

Info

Publication number: WO2021097881A1
Application number: PCT/CN2019/121380
Authority: WO
Inventors: 许凌云
Original assignee: 诚瑞光学(常州)股份有限公司
Priority date: 2019-11-19
Filing date: 2019-11-28
Publication date: 2021-05-27
Also published as: CN210894941U

Abstract

A lens module, comprising a lens barrel (100) and a lens assembly (200). The lens barrel (100) comprises an inner wall (120) surrounding an accommodating cavity (110) and an outer wall (130) opposite to the inner wall (120). The lens assembly (200) comprises a first lens (210) arranged in the accommodating cavity (110), the first lens (210) comprising an object side face next to the object side, an image side face next to the image side, and a side wall (213) connecting the object side face and the image side face, a material injection groove (221) being disposed on the side wall (213), and the material injection groove (221) and the inner wall (120) surrounding a material injection space (220) to accommodate light absorbent material. By means of disposing a material injection groove (221) on the first lens (210), the light absorbent material can be injected into the material injection groove (221). When the lens module is in use, the light absorbent material can absorb stray light entering the lens barrel (100) via a light-passing hole (111), thereby preventing the problem of glare produced during imaging by the lens module without the need to arrange a light-shielding component between the first lens (210) and a second lens (230); the structure is simple, and the usage effects are good.

Description

Lens module

Technical field

This application relates to the field of optical imaging technology, and in particular to a lens module.

Background technique

With the development of lens technology, lenses are widely used in electronic devices in various fields.

technical problem

The lens module in the prior art is prone to Flare (flare) problems during the imaging process. Therefore, the traditional lens module needs to use shading parts between the lenses to improve the glare phenomenon, but shading parts are arranged between the lenses. This leads to a complex structure of the lens module, which increases production cost and assembly difficulty. Therefore, it is necessary to provide a lens module to solve the above-mentioned problems.

Technical solutions

The purpose of this application is to provide a lens module, which aims to solve the problem of traditional lens modules that need to provide shading parts between the lenses in order to improve the glare phenomenon, resulting in a complex structure of the lens module, high production cost, and relatively difficult assembly. Big problem.

The technical solution of this application is as follows:

A lens module, including:

A lens barrel, the lens barrel includes an inner wall surrounding a accommodating cavity and an outer wall opposite to the inner wall; and

The lens assembly includes a first lens arranged in the accommodating cavity, the first lens including an object side surface close to the object side, an image side surface close to the image side, and a side wall connecting the object side surface and the image side surface, An injection groove is opened on the side wall, and the injection groove is enclosed with the inner wall to form an injection space for accommodating the light-absorbing material.

Optionally, the accommodating cavity includes a light-passing hole and a mounting hole that are connected in sequence, and the inner diameter of the light-passing hole is smaller than the inner diameter of the mounting hole; the inner wall includes a first hole wall and a second hole wall. The first hole wall encloses the light-passing hole, the second hole wall encloses the installation hole, and the second hole wall encloses the injection groove to form the injection space.

Optionally, the first lens includes an imaging part and a connecting part, the connecting part is arranged around the imaging part, and the side wall is located on a side of the connecting part away from the imaging part, the imaging part Protruding toward the object side and extending into the light-passing hole.

Optionally, the second lens is connected to the lens barrel, and the second lens abuts against the connecting portion.

Optionally, the inner wall further includes a connecting surface, the connecting surface is respectively connected to the first hole wall and the second hole wall, and a side of the connecting portion away from the image side abuts against the connecting surface .

Optionally, the injection groove is a spiral groove, and the central axis of the spiral groove coincides with the central axis of the lens barrel.

Optionally, the injection groove is an annular groove, and the extending direction of the axis of the annular groove is from the object side to the image side.

Optionally, the number of the annular grooves is at least two, and the at least two annular grooves are sequentially spaced from the object side to the image side.

Optionally, the light-absorbing material is any one or a combination of the following: carbon black, graphite.

Beneficial effect

The beneficial effects of this application are:

In the above-mentioned lens module, by opening the injection groove on the first lens, the light-absorbing material can be injected into the injection groove. When the lens module is in use, the light-absorbing material can absorb the stray light entering the lens barrel through the light hole. Therefore, the problem of glare caused by the lens module during imaging is avoided, and there is no need to arrange a light shielding part between the first lens and the second lens. The lens module has a simple structure and a good use effect.

Description of the drawings

Figure 1 is a front cross-sectional view of the application;

Figure 2 is an enlarged view of part A in Figure 1;

FIG. 3 is a schematic diagram of the structure of the first lens of the application.

Embodiments of the present invention

The application will be further described below in conjunction with the drawings and implementations.

The present application provides a lens module, as shown in FIG. 1, which includes a lens barrel 100 and a lens assembly 200. The lens barrel 100 is used as a carrier substrate of the lens module for mounting the lens assembly 200. The cross section of the lens barrel 100 may be Any one or a combination of the following: circular, polygonal, and the cross-section of the lens assembly 200 is the same as that of the lens barrel 100, so that the lens barrel 100 and the lens assembly 200 fit together, the installation state of FIG. 1, the object side is located The upper side of the lens barrel 100 and the image side are located on the lower side of the lens barrel 100.

Specifically, the lens barrel 100 includes an inner wall 120 surrounding the accommodating cavity 110 and an outer wall 130 opposite to the inner wall 120; the lens assembly 200 includes a first lens 210 disposed in the accommodating cavity 110, and the first lens 210 includes an object side The side wall of the object, the image side near the image side and the side wall of the connecting object and the side wall 213 of the image side. The side wall 213 is provided with an injection groove 221. The injection groove 221 and the inner wall 120 are enclosed to form an injection space 220 to accommodate the light-absorbing material .

In the above-mentioned lens module, by opening the injection groove 221 on the first lens 210, the light-absorbing material can be injected into the injection groove 221. When the lens module is in use, the light-absorbing material can absorb the light-absorbing material into the lens barrel through the light-passing hole 111 100 stray light, so as to avoid the problem of glare during imaging of the lens module, and there is no need to provide a shading part between the first lens 210 and the second lens 230. The lens module has a simple structure and good use effect.

Specifically, the accommodating cavity 110 includes a light-passing hole 111 and a mounting hole 112 connected in sequence. The inner diameter of the light-passing hole 111 is smaller than the inner diameter of the mounting hole 112; the inner wall 120 includes a first hole wall 121 and a second hole wall 122. The first hole The wall 121 encloses a light hole 111, the second hole wall 122 encloses a mounting hole 112, and the second hole wall 122 encloses the injection groove 221 to form an injection space 220.

In this embodiment, after the first lens 210 is inserted into the mounting hole 112, the side wall 213 can be matched with the second hole wall 122 to form an injection space 220 for injecting light-absorbing material; the light passes through the first hole The light-passing hole 111 formed by the wall 121 then enters the first lens 210, and the first lens 210 transmits the refracted light in the direction from the object side to the image side.

Specifically, the first lens 210 includes an imaging portion 211 and a connecting portion 212. The connecting portion 212 is arranged around the imaging portion 211, and the side wall 213 is located on the side of the connecting portion 212 away from the imaging portion 211, and the imaging portion 211 is convex toward the object side. Extend into the light-passing hole 111.

As shown in Figures 1 and 2, the injection groove 221 is provided on the side of the connecting portion 212 away from the optical axis 300, so that the injection groove 221 can be enclosed with the second hole wall 122 to form an injection space 220 to Accommodating the light-absorbing material; after the first lens 210 is installed in the mounting hole 112, the first lens 210 can be adjusted in the radial direction of the optical axis 300 through the cooperation of the first hole wall 121 and the outer wall 130 of the first lens 210 Limit.

As shown in FIG. 1, the second lens 230 is connected to the lens barrel 100, and the second lens 230 abuts on the connecting portion 212. Specifically, after the first lens 210 is installed in the lens barrel 100, the second lens 230 is installed in the accommodating cavity 110 in the direction from the image side to the object side, and the second lens 230 is kept away from the end surface of the image side and the connecting portion 212. Contact, so that the movement of the first lens 210 in the extension direction of the optical axis is limited by the second lens 230, so that the first lens 210 is fixed in the lens barrel 100; by setting the first lens 210 in two directions The first lens 210 is stably installed in the lens barrel 100 to stabilize the structure of the lens module.

Specifically, the connection method of the second lens 230 and the lens barrel 100 is any one of the following: bonding or interference fit; the second lens 230 can be fixedly connected to the lens barrel 100 through the above-mentioned connection method, so that the first lens 230 can be fixedly connected to the lens barrel 100. The lens 210 is stably installed in the lens barrel 100.

Specifically, the inner wall 120 further includes a connecting surface 123, the connecting surface 123 is respectively connected to the first hole wall 121 and the second hole wall 122, and the side of the connecting portion 212 away from the image side abuts against the connecting surface 123.

After the first lens 210 is installed in the mounting hole 112, the second lens 230 is placed in the accommodating cavity 110 from the image side to the object side, and abuts against the first lens 210 far from the object side through the second lens 230. On the other hand, until the opposite ends of the first lens 210 in the direction from the object side to the image side abut against the connecting surface 123 and the second lens 230 respectively, the first lens 210 can be fixed in the accommodating cavity 110.

As shown in FIG. 3, in one embodiment, the injection groove 221 is a spiral groove, and the central axis of the spiral groove extends in the direction from the object side to the image side. When the light-absorbing material is injected into the spiral groove, the light-absorbing material can flow in the spiral groove to extend the residence time of the light-absorbing material in the injection groove 221, so that the light-absorbing material can be solidified in the injection groove 221 and attached to the first lens 210 to achieve the function of the first lens 210 to absorb stray light.

In another embodiment, the injection groove 221 is an annular groove, and the extending direction of the axis of the annular groove is from the object side to the image side. By injecting a light-absorbing material into the annular groove, the first lens 210 can also have the function of absorbing stray light, which is not limited here.

Further, the number of the annular grooves is at least two, and the at least two annular grooves are sequentially spaced from the object side to the image side. By arranging a plurality of annular grooves in the first lens 210 along the extending direction of the optical axis 300, the first lens 210 can have a plurality of stray light absorption positions, thereby further improving the effect of the first lens 210 in absorbing stray light.

Specifically, the above-mentioned light-absorbing material is any one or a combination of the following: carbon black, graphite. The use of black carbon black and graphite materials as light-absorbing materials can further improve the stray light absorption effect of the lens module, so that the lens module has a good imaging effect.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Claims

A lens module, characterized in that it comprises:

A lens barrel, the lens barrel includes an inner wall surrounding a accommodating cavity and an outer wall opposite to the inner wall; and

The lens assembly includes a first lens arranged in the accommodating cavity, the first lens including an object side surface close to the object side, an image side surface close to the image side, and a side wall connecting the object side surface and the image side surface, An injection groove is opened on the side wall, and the injection groove is enclosed with the inner wall to form an injection space for accommodating the light-absorbing material.
The lens module according to claim 1, wherein the accommodating cavity comprises a light-passing hole and a mounting hole that are connected in sequence, and the inner diameter of the light-passing hole is smaller than the inner diameter of the mounting hole; the inner wall includes a A hole wall and a second hole wall, the first hole wall encloses the light-passing hole, the second hole wall encloses the mounting hole, and the second hole wall encloses the injection groove The injection space is formed.
The lens module according to claim 2, wherein the first lens comprises an imaging part and a connecting part, the connecting part is arranged around the imaging part, and the side wall is located far away from the connecting part. On one side of the imaging part, the imaging part protrudes toward the object side and extends into the light-passing hole.
The lens module of claim 3, wherein the lens assembly further comprises a second lens, the second lens is connected to the lens barrel, and the second lens abuts against the connecting portion .
The lens module according to claim 3, wherein the inner wall further comprises a connecting surface, the connecting surface is respectively connected to the first hole wall and the second hole wall, and the connecting portion is away from the image One side of the side abuts on the connecting surface.
The lens module according to claim 1, wherein the injection groove is a spiral groove, and the central axis of the spiral groove coincides with the central axis of the lens barrel.
The lens module according to claim 1, wherein the injection groove is an annular groove, and the extending direction of the axis of the annular groove is from the object side to the image side.
8. The lens module according to claim 7, wherein the number of the annular grooves is at least two, and the at least two annular grooves are sequentially spaced from the object side to the image side.
The lens module according to any one of claims 1-8, wherein the light-absorbing material is any one or a combination of the following: carbon black, graphite.