CN213072823U - Spacer ring, camera module and electronic equipment - Google Patents

Abstract

The application discloses a spacer ring, camera module and electronic equipment for camera module, the spacer ring includes spacer ring and extinction layer. The space ring is provided with a central line which is perpendicular to the radial direction of the space ring, the space ring comprises an inner peripheral wall surface, the inner peripheral wall surface comprises a first annular wall surface, the first wall surface is arranged around the central line and inclines towards one side where the central line is located along the direction from the object side end surface to the image side end surface of the space ring. The extinction layer is arranged on the first wall surface, the object side end surface of the spacing ring and the image side end surface of the spacing ring and is used for absorbing light rays irradiated to the extinction layer so as to reduce the reflectivity of the light rays on the surface of the extinction layer. The extinction layers are arranged on the first wall surface of the space ring, the object side end surface of the space ring and the image side end surface of the space ring, when light rays strike the extinction layers, the extinction layers have an absorption effect on the light rays, and the reflectivity of the light rays is reduced to weaken parasitic light generated by the space ring, so that the imaging quality of the image side of the camera module is improved.

Description

Spacer ring, camera module and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a spacing ring, a camera module and electronic equipment.

Background

In the prior art, a space ring can be arranged between two adjacent lenses, and the reflectivity of the light shading sheet is far lower than that of the space ring and can be almost ignored, so that the light shading sheet can be arranged on two sides of the space ring, the light shading sheet plays a role in shading the space ring, and the direct irradiation of light rays on the space ring can be reduced, so that the generation of stray light is reduced.

However, the space ring between two adjacent lenses is affected by the shape of the lens barrel, and the space ring also plays a role in connecting the lenses on two sides, so that the space ring cannot be well hidden in the shading sheets on two sides. When light is irradiated, the light is easy to irradiate the space ring to generate stray light, so that image blurring on the image side of the lens is caused. Therefore, how to weaken stray light of the spacer to improve the imaging quality has become an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The application provides a spacer ring, camera module and electronic equipment, has the advantage that the reflectivity that reduces light irradiation and shine on the spacer ring reduces the lens and produces the parasitic light and improves the image side image quality of lens.

According to a first aspect of the present application, there is provided a spacer ring for a camera module; the spacer ring includes: the spacer ring is provided with a central line which is perpendicular to the radial direction of the spacer ring, the spacer ring comprises an inner circumferential wall surface, the inner circumferential wall surface comprises a first annular wall surface, the first wall surface is arranged around the central line and is obliquely arranged towards one side of the central line along the direction from the object side end surface to the image side end surface of the spacer ring;

the extinction layer is arranged on the first wall surface, the object side end surface of the spacing ring and the image side end surface of the spacing ring;

the extinction layer is used for absorbing light irradiated to the extinction layer so as to reduce the reflectivity of the light on the surface of the extinction layer.

In the design, when incident light irradiates on the first wall surface, the extinction layer has an absorption effect on the light because the first wall surface is provided with the extinction layer, namely, the extinction layer can absorb a part of light to reduce the reflectivity of the light, so that the effect of weakening parasitic light to improve the imaging quality of the image side of the camera module is achieved. Meanwhile, due to uncertainty of incident light irradiation, the incident light may irradiate on the object side end face of the space ring or the image side end face of the space ring, and the extinction layer is also arranged on the object side end face of the space ring and the image side end face of the space ring, so that after the incident light irradiates on the object side end face of the space ring or the image side end face of the space ring, the extinction layer can absorb a part of light to reduce the reflectivity of the light, and the optimal extinction effect of the space ring is achieved.

The application is further configured to: the spacer ring further comprises a connecting glue layer, the extinction layer is a carbon powder layer, carbon powder particles are attached to the connecting glue layer to form the carbon powder layer, and the connecting glue layer is further used for adhering the extinction layer to the first wall surface, the object side end face of the spacer ring and the image side end face of the spacer ring.

In the design, the connecting glue layer plays a connecting role for the extinction layer, and the connecting glue layer can be a glue layer, a double-sided glue layer and the like.

The application is further configured to: the inner peripheral wall surface further comprises an annular second wall surface, the second wall surface is arranged around the central line and is arranged along the direction from the image side end surface to the object side end surface of the space ring, the second wall surface is arranged in an inclined mode towards one side where the central line is located, one end of the second wall surface is connected with the image side end surface of the space ring, the other end of the second wall surface is connected with the first wall surface, one end, away from the second wall surface, of the first wall surface is connected with the object side end surface of the space ring, and an included angle between the first wall surface and the second wall surface is an acute.

In the design, after incident light shines on first wall with certain angle, some light in the light is set up on first wall and is absorbed by extinction layer, another some light in the incident light is by first wall reflection, when incident light's angle of incidence satisfies certain limit, through the setting of second wall, can carry out the secondary reflection to the light that reflects behind first wall on the second wall, probably there is the effect of the secondary extinction that produces after light is reflected to first wall again, the reflectivity of light has further been reduced. Secondly, through setting the contained angle between first wall and the second wall to the acute angle, increased the incident ray through the first wall after the reflection to the possibility on the second wall, and then increased the probability that the light is reflected to the first wall again, thereby realized the secondary extinction and guaranteed the effectual weakening or the possible elimination of space ring to light.

The application is further configured to: the included angle between the first wall surface and the second wall surface is a first included angle, and the angle of the first included angle is between 20 degrees and 80 degrees.

In the design, it cannot be guaranteed that incident light rays irradiate the first wall surface at the same incident angle every time, and in order to enable the incident light rays to be reflected to the second wall surface as much as possible after being reflected by the first wall surface, secondary reflection is carried out on the second wall surface, so that the light rays can be reflected to the first wall surface again as much as possible, and secondary extinction is carried out to further reduce the reflectivity of the light rays. When the angle of the first included angle is 20 degrees and the incident angle of the incident light meets a certain range, the remaining light can be reflected to the minimum critical state on the first wall surface again after being reflected again by the second wall surface. When the angle of the first included angle is 80 degrees and the incident angle of the incident light meets a certain range, the rest light can be reflected to the maximum critical state on the first wall surface again after being reflected again by the second wall surface. When the angle of the first included angle is between 20 degrees and 80 degrees, as long as the incident angle of the incident light meets a certain range, the incident light is reflected to the second wall surface through the first wall surface, and then reflected to the first wall surface again through the second wall surface to form multiple reflections, so that the light is further weakened or possibly eliminated.

The application is further configured to: the section of the first wall surface on the plane passing through the center line comprises two first edge lines, the two first edge lines are symmetrically arranged relative to the center line, the section of the second wall surface on the plane passing through the center line comprises two second edge lines, the two second edge lines are symmetrically arranged relative to the center line, and the ratio of the length size of the first edge lines to the length size of the second edge lines is between 1.2 and 5.0.

In the design, the first wall surface is used as an area for receiving and reflecting incident light rays for the first time, the incident light rays are received as much as possible by increasing the area of the first wall surface, namely, the length size of the first edge line of the first wall surface is increased, the incident light rays are increased, the probability that the light rays are reflected to the second wall surface after being reflected by the first wall surface is increased, the probability that the light rays are reflected to the first wall surface again after being reflected by the second wall surface is increased, namely, the reflectivity of the light rays is reduced, and stray light is further weakened or eliminated possibly.

The application is further configured to: the second wall surface is provided with a extinction layer.

In the design, the extinction layer is arranged on the second wall surface, so that the second wall surface has an extinction function, light can be absorbed, and the reflectivity of the light is reduced. When light passes through the first wall surface, one part of light is absorbed by the extinction layer on the first wall surface, and the other part of light is reflected by the first wall surface and then possibly irradiates the second wall surface.

According to a second aspect of the present application, there is provided a camera module; this camera module includes:

at least one spacer ring as described above;

a lens barrel defining an accommodation chamber;

a plurality of lenses;

wherein, each lens is equallyd divide and is set up respectively in holding the cavity, and the periphery wall of each lens is equallyd divide respectively with the internal perisporium of lens-barrel and is connected, is provided with a spacer ring between two at least adjacent lenses.

In this design, along the direction of the light path axis of camera module, when the interval between two adjacent lenses is great, in order to avoid putting the great anti-dazzling screen of thickness between two lenses, can replace anti-dazzling screen with the spacer ring and place the spacer ring between two adjacent lenses, the spacer ring can also play the effect of connecting two adjacent lenses. The camera module with the spacer ring can reduce stray light, so that the imaging quality of the image side of the camera module is ensured.

The application is further configured to: the spacer ring further comprises an annular light shielding part, the light shielding part is arranged around the center line, the light shielding part is connected to the inner peripheral wall surface and extends towards the center line, the light shielding part is used for shielding light conducted in a non-imaging area of the lens, and an extinction layer is arranged on the outer surface of the light shielding part.

In the design, the shading part can shade light rays conducted by a non-imaging area of the lens, and stray light is reduced, so that the imaging quality of the image side of the camera module is improved. When the space ring does not set up the shading portion, the both sides of space ring can set up the anti-dazzling screen, the anti-dazzling screen can shelter from the light that conducts in the non-imaging area of lens, through set up the shading portion on the space ring, the shading portion replaces the anti-dazzling screen to play the effect of the light that conducts in the non-imaging area of sheltering from the lens for the camera module that has this spacer ring can play the effect that reduces the use accessory, reduce the accumulative error, improve production efficiency, reduce cost's effect. The shading part can shade light rays conducted by a non-imaging area of the lens, and the extinction layer is arranged on the outer surface of the shading part and can absorb partial incident light rays when the incident light rays irradiate the outer surface of the shading part, so that the reflectivity of the incident light rays is reduced, and the imaging quality of the image side of the camera module is improved.

According to a third aspect of the present application, there is provided an electronic device; the electronic equipment comprises the camera module.

In the design, the camera module comprises a spacer ring, the spacer ring comprises a spacer ring, a extinction layer is arranged on a first wall surface of the spacer ring and can absorb incident light and reduce the reflectivity of the incident light, secondly, the shading part can shade the conduction light in a non-imaging area of the lens through the setting of the shading part, and secondly, the surface of the shading part is provided with the extinction layer which can absorb the light irradiated on the outer surface of the shading part. In summary, the electronic device having the camera module can improve the image quality of the image side of the electronic device.

The application provides a spacer ring, camera module and electronic equipment for camera module, when incident light shines on the first wall of space ring, because first wall is provided with extinction layer, the extinction layer has the absorbing effect to light, and the extinction layer can absorb some light and reduce the reflectivity of light promptly to reach the effect that weakens the parasitic light and improve the formation of image quality of the image side of camera module. Meanwhile, due to uncertainty of incident light irradiation, the incident light may irradiate on the object side end face of the space ring or the image side end face of the space ring, and the extinction layer is also arranged on the object side end face of the space ring and the image side end face of the space ring, so that after the incident light irradiates on the object side end face of the space ring or the image side end face of the space ring, the extinction layer can absorb a part of light to reduce the reflectivity of the light, and the optimal extinction effect of the space ring is achieved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a full-section structure of a camera module in the prior art;

FIG. 2 is a schematic cross-sectional view of a spacer in the prior art;

fig. 3 is a schematic full-sectional structure view of a camera module according to an embodiment of the present application;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 3;

FIG. 5 is a schematic cross-sectional view of a spacer and a light shielding portion according to an embodiment of the present disclosure;

FIG. 6 is a schematic cross-sectional view illustrating a structure of a light-shielding portion and a spacer after being connected according to an embodiment of the present disclosure;

fig. 7 is a schematic view of a first full-section structure of a camera module according to an embodiment of the present application;

FIG. 8 is a second schematic view of a full cross-section of a camera module according to an embodiment of the present disclosure;

FIG. 9 is an enlarged view of the structure at A in FIG. 8;

fig. 10 is a third schematic full-section structural diagram of a camera module according to an embodiment of the present application.

Reference numerals: 10-a camera module; 11-a lens barrel; 12-a lens; 13-can peripheral wall; 14-a can sidewall; 20-space ring; 21-an object-side end face; 22-an image side end face; 30-a shading sheet; 100-a camera module; 110-a lens barrel; 111-optical path axis; 112-a containment chamber; 120-a lens; 130-a shading sheet; 200-spacer ring; 210-space ring; 211-an object-side end face; 212-image side end face; 213-outer peripheral wall surface; 214-inner peripheral wall surface; 215-a first wall; 2151-first edge line; 216-a second wall; 2161-a second edge line; 220-a matte layer; 230-connecting glue layer; 300-a light-shielding portion; 310-connecting surface; 320-an object side light shading surface; 330-third wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

For convenience of description, when the camera module 10 is used to shoot an object, an end or an end surface of any component of the camera module 10 close to the object is referred to as an object side or an object side (pointing direction a shown in fig. 1) of the end or the end surface of any component of the camera module 10 away from the object is referred to as an image side or an image side (pointing direction B shown in fig. 1) of the end or the end surface of any component of the camera module 10.

The camera module 10 includes a lens barrel 11 and a plurality of (two or more) lenses 12. The lens barrel 11 defines an optical path axis, wherein light reflected by a photographed object passes through the lens barrel 11 from an object-side end of the lens barrel 11 in a direction parallel to the optical path axis and reaches an image-side end of the lens barrel 11. The lens barrel 11 also defines an accommodation chamber, wherein the lens barrel 11 includes a barrel peripheral wall 13 around the optical path axis and a barrel side wall 14 connected to an object side end of the barrel peripheral wall of the lens barrel 11, an outer edge of the barrel side wall 14 is connected to the object side end of the barrel peripheral wall 13, and the barrel peripheral wall 13 and the barrel side wall 14 together define the accommodation chamber. The lenses 12 are sequentially disposed in the accommodating chamber in a predetermined order, and the outer side walls of the lenses 12 are connected to the inner side walls of the cylindrical wall 13.

Referring to fig. 1-2, in the prior art, a spacer 20 is disposed between two adjacent lenses 12, and it should be noted that, after the spacer 20 is disposed in the lens barrel 11, that is, the spacer 20 can be regarded as a component of the camera module 10, an end surface of the spacer 20 on a side close to an object is defined as an object-side end surface 21 of the spacer 20, and an end surface of the spacer 20 on a side away from the object is defined as an image-side end surface 22 of the spacer 20. Because the reflectivity of the light-shielding sheet 30 is far lower than that of the space ring 20 and can be almost ignored, the light-shielding sheets 30 are arranged on both sides of the space ring 20, the light-shielding sheets 30 can shield the space ring 20, and the phenomenon that light rays directly irradiate the space ring 20 so as to reduce the generation of stray light can be reduced.

However, the space ring 20 between two adjacent lenses 12 is affected by the shape of the lens barrel 11, and the space ring 20 also plays a role of connecting the lenses 12 on both sides, so that the space ring 20 cannot be well hidden in the light shielding sheets 30 on both sides. When the light is irradiated, stray light is easily generated by irradiating the spacer 20, and the image quality of the image side of the lens 12 is poor. Therefore, how to weaken stray light of the spacer 20 to improve the image quality on the image side becomes an urgent problem to be solved.

In order to solve the above technical problem, please refer to fig. 3-7, a first aspect of the present application provides a spacer ring 200 for a camera module 100, where the spacer ring 200 includes a spacer 210 and a light-eliminating layer 220.

Spacer 210 may be any shape that is a closed ring, for example, spacer 210 may be a circular ring or a square ring. When cage 210 is a circular ring, cage 210 has a centerline disposed perpendicular to its radial direction. The spacer 210 includes an inner peripheral wall surface 214 and an outer peripheral wall surface 213 provided around the inner peripheral wall surface 214, and the inner peripheral wall surface 214 and the outer peripheral wall surface 213 are provided concentrically. Spacer 210 further includes an object-side end 211 and an image-side end 212, where image-side end 212 and object-side end 211 are parallel to each other and are both arranged perpendicular to the central line. An end surface of spacer 210 on the side close to the object is defined as an object-side end surface 211 of spacer 210, and an end surface of spacer 210 on the side away from the object is defined as an image-side end surface 212 of spacer 210. The outer edge of object-side end surface 211 of spacer 210 is connected to the edge of outer peripheral wall surface 213 of spacer 210, the inner edge of object-side end surface 211 of spacer 210 is connected to the edge of inner peripheral wall surface 214 of spacer 210, the outer edge of image-side end surface 212 of spacer 210 is connected to the edge of outer peripheral wall surface 213 of spacer 210 that faces away from image-side end surface 212, and the inner edge of image-side end surface 212 of spacer 210 is connected to the edge of inner peripheral wall surface 214 of spacer 210 that faces away from image-side end surface 212.

Referring to fig. 5-7, inner circumferential wall surface 214 of spacer 210 includes a first annular wall surface 215, and first annular wall surface 215 is disposed around the center line and inclined toward the side where the center line is located along a direction from object-side end surface 211 of spacer 210 to image-side end surface 212 of spacer 210. That is, first wall surface 215 includes an inner edge on the side close to image-side end surface 212 of spacer 210 and an outer edge on the side close to object-side end surface 211 of spacer 210, and a distance between the outer edge of first wall surface 215 and the center line is smaller than a distance between the inner edge of first wall surface 215 and the center line in a direction parallel to the radial direction of spacer 210, in other words, a radius dimension (e.g., dimension a in fig. 7) of a circumferential surface on which the outer edge of first wall surface 215 is located is smaller than a radius dimension (e.g., dimension b in fig. 7) of a circumferential surface on which the inner edge of first wall surface 215 is located.

The outer peripheral wall surface 213 of the spacer 210 is connected to the inner wall surface of the cylinder peripheral wall, and the spacer 210 also serves to connect the lenses 120 on both sides thereof. When the light irradiates the inner peripheral wall surface 214 of the spacer 210, an included angle exists between the light and the inner peripheral wall surface 214 of the spacer 210, so that the light is reflected on the inner peripheral wall of the spacer 210 to generate stray light. In order to reduce stray light generated by light rays on the inner peripheral wall surface 214 of the space ring 210 and improve the imaging quality of an object on the image side, the first wall surface 215 of the space ring 210 is provided with the extinction layer 220, the extinction layer 220 has an extinction function, and the light rays are absorbed by the extinction layer 220 after irradiating the extinction layer 220 so as to reduce the reflectivity of the light rays. For example, after the extinction layer 220 is disposed on the first wall surface 215 of the spacer 210, light is irradiated onto the first wall surface 215 of the spacer 210, and the extinction layer 220 can absorb a part of the light to reduce the reflectance of the light, thereby reducing the generation of stray light, i.e., improving the image quality of the object on the image side. The extinction layer 220 may be disposed on the first wall surface 215 of the spacer 210 by spraying, or the extinction layer 220 may be disposed on the first wall surface 215 of the spacer 210 by plating. It should be noted that the connection manner between the extinction layer 220 and the first wall 215 of the spacer 210 depends on the material and structure of the extinction layer 220.

When the incident light beam is irradiated from the object side to the image side of the camera module, the incident light beam may be directly irradiated onto the object side end surface 211 of the spacer 210 or the image side end surface 212 of the spacer 210 due to uncertainty in the irradiation of the incident light beam. To further optimize the extinction effect of the spacer 210, in this embodiment, the extinction layer 220 is preferably disposed on the object-side end surface 211 of the spacer 210 and the image-side end surface 212 of the spacer 210. The extinction layer 220 may be disposed on the object-side end surface 211 of the spacer 210 and the image-side end surface 212 of the spacer 210 by a spray coating method, or may be disposed on the object-side end surface 211 of the spacer 210 and the image-side end surface 212 of the spacer 210 by a plating method. After the incident light beam irradiates on the object-side end surface 211 of the space ring 210 or the image-side end surface 212 of the space ring 210, the extinction layer 220 can also absorb a part of the light beam to reduce the reflectivity of the light beam, thereby achieving the optimal extinction effect of the space ring 210.

By arranging the extinction layers 220 on the first wall surface 215 of the spacer 210, the object-side end surface 211 of the spacer 210 and the image-side end surface 212 of the spacer 210, after uncertain incident light rays irradiate the first wall surface 215 of the spacer 210, the object-side end surface 211 of the spacer 210 or the image-side end surface 212 of the spacer 210, the extinction layers 220 can weaken or possibly eliminate the light rays, so that the extinction effect of the spacer 210 is optimal, and the imaging quality of the image side of the camera module is improved.

Referring to fig. 5-7, for convenience of description, the extinction layer 220 is taken as a carbon powder layer for illustration, the carbon powder layer is composed of a plurality of fine carbon powder particles, after the carbon powder layer is attached to the first wall surface 215, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210, the first wall surface 215, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210 are changed from original smooth surfaces to rough surfaces of the carbon powder particles, which can have a better extinction effect on light, and then the carbon powder layer is composed of a plurality of fine carbon powder particles, which are dark (e.g., dark black) in color, and the dark black can absorb color light of any color, thereby ensuring effective absorption of light by the carbon powder layer. Therefore, the carbon powder layer has good extinction performance, and can perform an extinction function on the light irradiated on the first wall surface 215, the object-side end surface 211 of the spacer 210 and the image-side end surface 212 of the spacer 210 to reduce the reflectivity of the light, weaken stray light of the spacer 210, and improve the image quality of the image side of the camera module 100.

The carbon powder layer is composed of numerous fine carbon powder particles, and the carbon powder particles need to be in a molten state at a high temperature, and the spacer ring 210 may not be able to bear a melting point of the carbon powder particles, that is, when the molten carbon powder is directly coated on the first wall surface 215 of the spacer ring 210, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210, the first wall surface 215 of the spacer ring 210, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210 may be "hot". In order to conveniently dispose the carbon powder layer on the first wall surface 215 of the spacer ring 210, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210, the spacer ring 200 may further include a connection adhesive layer 230 disposed on the first wall surface 215 of the spacer ring 210, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210, where the connection adhesive layer 230 is used to connect the carbon powder layer and the first wall surface 215 of the spacer ring 210, in other words, the connection adhesive layer 230 is used to bond the extinction layer 220 to the first wall surface 215 of the spacer ring 210, the object-side end surface 211 of the spacer ring 210, and the image-side end surface 212 of the spacer ring 210, and when the extinction layer 220 is the carbon powder layer, carbon powder particles are attached to the. The connection adhesive layer 230 may be a double-sided adhesive layer or a glue layer. The overall volume of the space ring 210 is small, and in order to facilitate disposing the connection glue layer 230 on the first wall surface 215 of the space ring 210, it is preferable that the connection glue layer 230 is a glue layer in this embodiment.

Referring to fig. 8-9, the propagation speed of light in air is fast, that is, the time of light staying on the first wall surface 215 of the space ring 210 when the light irradiates the space ring 210 is short, that is, the light can absorb part of light in the light after the light irradiates the carbon powder layer. In order to increase the time for light rays to stay on the first wall surface 215 of the space ring 210, i.e. to enhance the absorption of the carbon powder layer to the light rays for better reducing or eliminating stray light, the inner peripheral wall surface 214 of the space ring 210 further includes a second wall surface 216 disposed annularly, the second wall surface 216 is disposed around the central line and is directed toward the object-side end surface 211 of the space ring 210 along the image-side end surface 212 of the space ring 210, the second wall surface 216 is disposed obliquely toward the side where the central line is located, i.e. the second wall surface 216 includes an inner edge close to the image-side end surface 212 side of the space ring 210 and an outer edge close to the object-side end surface 211 side of the space ring 210, and in a direction parallel to the radial direction of the space ring 210, the distance between the outer edge of the second wall surface 216 and the central line is greater than the distance between the inner edge of the first wall surface 215 and the central line, in other words, the radius dimension (e. dimension c in fig. 7) of (dimension d in fig. 7).

An inner edge of the second wall surface 216 (an edge of the second wall surface 216 close to the image side end surface 212 of the camera module) is connected to an edge line of the image side end surface 212 of the spacer 210, an outer edge of the second wall surface 216 (an edge of the second wall surface 216 close to the object side end surface 211 of the camera module) is connected to an inner edge of the first wall surface 215 (an edge of the first wall surface 215 close to the image side end surface 212 of the camera module), and an outer edge of the first wall surface 215 (an edge of the first wall surface 215 close to the object side end surface 211 of the camera module) is connected to an edge line of the object side end surface 211 of the spacer 210. When the incident light is irradiated onto the first wall surface 215 at a certain angle, a part of the light is absorbed by the extinction layer 220 disposed on the first wall surface 215, and another part of the light is reflected by the first wall surface 215, and when the incident angle of the incident light satisfies a certain range, the light reflected by the first wall surface 215 may be reflected for the second time on the second wall surface 216 by the arrangement of the second wall surface 216, and there may be a secondary extinction effect generated after the light is reflected onto the first wall surface 215 again, thereby further reducing the reflectivity of the light.

Referring to fig. 7, in a cross section of the first wall 215 in a plane passing through the center line, the dimension a is smaller than the dimension b, and the dimension c is larger than the dimension d, i.e. the included angle between the first wall 215 and the second wall 216 is an acute angle (the angle γ shown in fig. 5-6). By setting the included angle between the first wall surface 215 and the second wall surface 216 to be an acute angle, the possibility that incident light rays are reflected to the second wall surface 216 after passing through the first wall surface 215 is increased, the probability that the light rays are reflected to the first wall surface 215 again is further increased, secondary extinction is realized, and therefore the effective weakening or possible elimination effect of the space ring 210 on the light rays is guaranteed. For convenience of description, the included angle formed between the first wall 215 and the second wall 216 is defined as a first included angle.

Referring to fig. 8-9, it is not guaranteed that the incident light beam irradiates the first wall surface 215 at the same incident angle every time, in order to reflect the incident light beam to the second wall surface 216 as much as possible after being reflected by the first wall surface 215, and then perform a secondary reflection on the second wall surface 216, so that the light beam can be reflected to the first wall surface 215 again as much as possible, and perform a secondary extinction to further reduce the reflectivity of the light beam. Preferably, in the present embodiment, the angle of the first included angle is between 20 and 80 degrees. For example, the first included angle may be 20 degrees, 50 degrees, 80 degrees, etc.

When the angle of the first included angle is 20 degrees and the incident angle of the incident light satisfies a certain range, the remaining light can be reflected again to the minimum critical state on the first wall 215 after being reflected again by the second wall 216. When the angle of the first included angle is 80 degrees and the incident angle of the incident light satisfies a certain range, the remaining light can be reflected again to the maximum critical state on the first wall 215 after being reflected again by the second wall 216. When the angle of the first included angle is between 20 degrees and 80 degrees, as long as the incident angle of the incident light satisfies a certain range, the incident light is reflected to the second wall 216 through the first wall 215, and then reflected to the first wall 215 again through the second wall 216, so as to form multiple reflections, further weakening or possibly eliminating the light.

Referring to fig. 8-10, in order to make the first wall 215 receive as much incident light as possible and make the incident light absorbed by the carbon powder layer as much as possible to reduce the reflectivity of the incident light and reduce the generation of stray light, in this embodiment, a cross-section of the first wall 215 passing through a center line includes two first edge lines 2151, the two first edge lines 2151 are symmetrically disposed about the center line (as shown in fig. 7), a cross-section of the second wall 216 passing through a plane of the center line includes two second edge lines 2161, the two second edge lines 2161 are symmetrically disposed about the center line (as shown in fig. 7), and a ratio of a length dimension of the first edge line 2151 to a length dimension of the second edge line 2161 is between 1.2 and 5.0. For example, the ratio of the length dimension of the first edge line 2151 to the length dimension of the second edge line 2161 may be 1.2, 3.0, 5.0, etc.

By increasing the area of the first wall surface 215, that is, increasing the length of the first edge line 2151 of the first wall surface 215, when the ratio of the length of the first edge line 2151 to the length of the second edge line 2161 is between 1.2 and 5.0, the first wall surface 215 can receive incident light as much as possible, the incident light is increased, the probability that the light is reflected onto the second wall surface 216 after being reflected by the first wall surface 215 is increased, the probability that the light is reflected onto the first wall surface 215 again after being reflected by the second wall surface 216 is increased, that is, the reflectivity of the light is reduced, and stray light is further attenuated or eliminated.

After an incident light beam irradiates the first wall surface 215 of the space ring 210 at a certain incident angle, the incident light beam irradiates the second wall surface 216 by reflection of the first wall surface 215, a first included angle between the first wall surface 215 and the second wall surface 216 is an acute angle, and the light beam may be reflected again to the first wall surface 215 after being reflected by the second wall surface 216, in order to further enhance the extinction effect of the extinction layer 220 on the light beam, in this embodiment, the second wall surface 216 is also provided with the extinction layer 220, the extinction layer 220 is a carbon powder layer, and similarly, the carbon powder layer may be connected with the second wall surface 216 by the connection glue layer 230, and the connection glue layer 230 is also a glue layer.

By providing the extinction layer 220 on the second wall surface 216, the second wall surface 216 also has an extinction effect, and can absorb light and reduce the reflectivity of light. When the light passes through the first wall surface 215, a part of the light is absorbed by the extinction layer 220 on the first wall surface 215, and another part of the light is reflected by the first wall surface 215 and may irradiate on the second wall surface 216, at this time, the extinction layer 220 on the second wall surface 216 can further absorb the light, that is, the extinction layer 220 on the second wall surface 216 plays a role in absorbing the light again, so that the stray light of the spacer ring 210 is further weakened or may be eliminated, and the imaging quality of the image side surface of the camera module 100 is improved.

Referring to fig. 8-10, a second aspect of the present application provides a camera module 100, where the camera module 100 includes at least one spacer ring 200 as described above, and the camera module 100 further includes a lens barrel 110 and a lens 120.

The lens barrel 110 includes a barrel peripheral wall and a barrel side wall connected to an object side end of the barrel peripheral wall. It should be noted that lens barrel 110 is the same as lens barrel 110 in the prior art, and the detailed description is omitted here. Wherein the cylinder peripheral wall and the cylinder side wall of the lens barrel 110 together define an accommodating chamber 112, and the cylinder peripheral wall of the lens barrel 110 defines an optical path axis 111.

The number of the lenses 120 is plural, each lens 120 is sequentially stacked in the accommodating chamber 112, and the outer peripheral wall of each lens 120 is connected to the inner side surface of the cylindrical wall. A spacer ring 200 is disposed between at least two adjacent lenses 120.

There may be a difference in the thickness of each lens 120 in the direction of the optical path axis 111, and when the lenses 120 are mounted, the size of the space between adjacent lenses 120 may be different depending on the internal structural arrangement of the cylinder peripheral wall of the lens barrel 110. Referring to fig. 8 to 9, for example, when the number of the lenses 120 is five, the lens 120 disposed close to the object side is defined as the first lens 120, the lens 120 disposed close to the image side is defined as the fifth lens 120, the size of the space between the first lens 120 and the second lens 120 is the dimension D1 (D1 shown in fig. 10), the size of the space between the third lens 120 and the fourth lens 120 is the dimension D3 (D3 shown in fig. 10), and D1 is smaller than D3. In order to reduce the number of parts (i.e., the spacer ring 200) and reduce the accumulated error, the spacer ring 200 is disposed between the third lens 120 and the fourth lens 120 in this embodiment.

When the incident light irradiates the lens 120, the light is also transmitted in the non-imaging area of the lens 120, and in the prior art, the light-shielding sheets 130 are usually disposed on two sides of the spacer 210 to shield the light transmitted in the non-imaging area of the lens 120. The length of the lens barrel 110 along the optical path axis 111 is increased by the arrangement of the light-shielding sheet 130, and the length of the lens barrel 110 is too large due to the excessive arrangement of the light-shielding sheet 130, that is, the volume of the lens barrel 110 is too large, which causes inconvenience in carrying. To reduce the length of lens barrel 110 along optical path axis 111, spacer ring 200 further includes annular light blocking portion 300, where light blocking portion 300 and spacer 210 may be separated from each other by two parts, and light blocking portion 300 may also be integrally formed with spacer 210. The light shielding portion 300 is arranged around the center line, the light shielding portion 300 is connected to the inner peripheral wall surface 214 and extends toward the center line, and the light shielding portion 300 is used for shielding light rays conducted in the non-imaging area of the lens 120. The light shielding portion 300 includes a connection surface 310 connected to the inner peripheral wall surface 214 of the spacer 210, an object side light shielding wall surface close to the object side, and a third wall surface 330 inclined from the center line. An inner edge of the third wall 330 near the image side is connected to an inner edge of the connection surface 310 near the image side, an outer edge of the third wall 330 near the object side is connected to one edge of the object-side light-shielding wall surface, and an outer edge of the connection surface 310 near the object side is connected to the other edge of the object-side light-shielding wall surface. In other words, the cross-section of the over-center line, the edge line of the first wall 215, the edge line of the connecting surface 310 and the edge line of the object-side light-shielding surface 320 are connected end to form a right-angled triangle (as shown in fig. 5-6).

The light shielding portion 300 can shield light rays transmitted by the non-imaging area of the lens 120, and reduce stray light, thereby improving the image quality of the image side of the camera module 100. Through set up shading portion 300 on spacer 210, shading portion 300 replaces light-shielding sheet 130 to play the effect of sheltering from the light that conducts in the non-image zone of lens 120 for camera module 100 that has this spacer ring 200 can play the effect that reduces the use accessory, reduces accumulative error, improves production efficiency, reduce cost's effect.

The light shielding portion 300 can shield the light transmitted in the non-imaging area of the lens 120, that is, when the light irradiates on the third wall 330 of the light shielding portion 300, the third wall 330 can only reflect the light and does not attenuate the light. In order to attenuate the light when the light irradiates the third wall 330, in this embodiment, the third wall 330 of the light shielding portion 300 is also provided with the extinction layer 220, preferably, the extinction layer 220 is a carbon powder layer, and similarly, the connection adhesive layer 230 may be provided between the carbon powder layer and the third wall 330, preferably, the connection adhesive layer 230 is a glue layer. By providing the extinction layer 220 on the outer surface of the light shielding portion 300, when the incident light irradiates the outer surface of the light shielding portion 300, the extinction layer 220 can absorb part of the incident light, that is, the reflectivity of the incident light is reduced, thereby improving the image quality on the image side of the camera module 100. When the light shielding portion 300 and the spacer 210 are integrally formed, the connection adhesive layer 230 and the extinction layer 220 on the first wall surface 215 of the spacer 210 and the third wall surface 330 of the light shielding portion 300 can be coated at one time.

Similarly, in order to enhance the overall extinction performance of the light shielding portion 300, in other embodiments, the extinction layer 220 may also be disposed on the object-side light-shielding surface 320 of the light shielding portion 300, the extinction layer 220 is a carbon powder layer, and similarly, the carbon powder layer may also be connected with the object-side light-shielding surface 320 by the connection glue layer 230, and the connection glue layer 230 is also a glue layer.

A third aspect of the present application provides an electronic device, which includes the camera module 100 described above. For example, the electronic device may be a device having an image capturing function, such as a mobile phone, a computer, an IPAD, or a video camera. Because camera module 100 includes spacer ring 200, spacer ring 200 includes spacer ring 210, is provided with extinction layer 220 on the first wall 215 of spacer ring 210, and extinction layer 220 can absorb incident light, reduces incident light's reflectivity, and secondly, through the setting of shading portion 300, shading portion 300 can shelter from the conduction light in the non-imaging area of lens 120, and secondly, the surface of shading portion 300 is provided with extinction layer 220, and extinction layer 220 can absorb the light that shines on the surface of shading portion 300. As described above, the electronic apparatus having the camera module 100 can improve the image quality of the image side of the electronic apparatus.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (9)

1. A spacer ring for a camera module, the spacer ring comprising:

the spacer ring is provided with a central line which is perpendicular to the radial direction of the spacer ring, the spacer ring comprises an inner circumferential wall surface, the inner circumferential wall surface comprises a first annular wall surface, the first wall surface is arranged around the central line and is arranged along the direction from the object side end surface to the image side end surface of the spacer ring, and the first wall surface is obliquely arranged towards one side of the central line;

the extinction layer is arranged on the first wall surface, the object side end surface of the spacing ring and the image side end surface of the spacing ring;

the extinction layer is used for absorbing light irradiated to the extinction layer so as to reduce the reflectivity of the light on the surface of the extinction layer.

2. The spacer ring of claim 1,

the spacer ring further comprises a connecting glue layer, the extinction layer is a carbon powder layer, carbon powder particles are attached to the connecting glue layer to form the carbon powder layer, and the connecting glue layer is further used for adhering the extinction layer to the first wall surface, the object side end face of the spacer ring and the image side end face of the spacer ring.

3. The spacer ring of claim 1,

the inner peripheral wall surface further comprises an annular second wall surface, the second wall surface winds the central line is arranged and follows the direction from the image side end surface to the object side end surface of the space ring, the second wall surface faces one side where the central line is located in an inclined mode, one end of the second wall surface is connected with the image side end surface of the space ring, the other end of the second wall surface is connected with the first wall surface, one end of the first wall surface deviates from the second wall surface is connected with the object side end surface of the space ring, and an included angle between the first wall surface and the second wall surface is an acute angle.

4. The spacer ring of claim 3,

the included angle between the first wall surface and the second wall surface is a first included angle, and the angle of the first included angle is between 20 degrees and 80 degrees.

5. The spacer ring of claim 3,

the section of the first wall surface on the plane passing through the center line comprises two first edge lines, the two first edge lines are symmetrically arranged around the center line, the section of the second wall surface on the plane passing through the center line comprises two second edge lines, the two second edge lines are symmetrically arranged around the center line, and the ratio of the length dimension of the first edge lines to the length dimension of the second edge lines is between 1.2 and 5.0.

6. The spacer ring of claim 3,

the second wall surface is provided with the extinction layer.

7. The utility model provides a camera module which characterized in that includes:

at least one spacer ring as claimed in any one of the preceding claims 1 to 6;

a lens barrel defining an accommodation chamber;

a plurality of lenses;

the lens is respectively arranged in the accommodating cavity, the outer peripheral wall of each lens is respectively connected with the inner peripheral wall of the lens barrel, and one spacing ring is arranged between at least two adjacent lenses.

8. The camera module of claim 7,

the spacer ring further comprises an annular light shielding part, the light shielding part is arranged around the central line, the light shielding part is connected to the inner peripheral wall surface and extends towards the central line, the light shielding part is used for shielding light rays conducted in a non-imaging area of the lens, and an extinction layer is arranged on the outer surface of the light shielding part.

9. An electronic device, comprising:

the camera module of any one of claims 7-8.

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