CN211148963U

CN211148963U - Anti-dazzling screen

Info

Publication number: CN211148963U
Application number: CN201922224265.0U
Authority: CN
Inventors: 张成卓; 赵烈烽; 戴付建
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-07-31
Anticipated expiration: 2029-12-12

Abstract

The utility model provides a shading sheet. The anti-dazzling screen has object side face and image side face along the optical axis direction, includes: the main body part is of a hollow structure, at least the side wall of the hollow structure is provided with a dyeing layer, and the surface of the dyeing layer extends upwards from the object side surface of the main body part to the image side surface of the main body part in an inclined mode; the first surface layer is attached to the surface of the object side; the second surface layer is attached to the surface of the image side, and the inner side surface of the first surface layer, the inner side surface of the second surface layer and the surface of the dyeing layer are on the same plane. The utility model provides an among the prior art there is stray light's problem in the anti-dazzling screen.

Description

Anti-dazzling screen

Technical Field

The utility model relates to an optical imaging equipment technical field particularly, relates to a light-shielding sheet.

Background

Along with the rapid development of electronic products with a photographing function, people have higher and higher requirements on the quality of an imaging lens, stray light seriously affects the imaging quality of the imaging lens, and the stray light is a problem to be solved urgently on the way of improving the imaging quality of the imaging lens.

That is, the light-shielding sheet in the prior art has a problem of stray light.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a light-shielding sheet for solving the problem of stray light in the light-shielding sheet of the prior art.

In order to achieve the above object, the utility model provides a light-shielding sheet, light-shielding sheet have object side and face side along the optical axis direction, include: the main body part is of a hollow structure, at least the side wall of the hollow structure is provided with a dyeing layer, and the surface of the dyeing layer extends upwards from the object side surface of the main body part to the image side surface of the main body part in an inclined mode; the first surface layer is attached to the surface of the object side; the second surface layer is attached to the surface of the image side, and the inner side surface of the first surface layer, the inner side surface of the second surface layer and the surface of the dyeing layer are on the same plane.

Further, the inclination angle a of the surface of the dyed layer is not less than 20 degrees and not more than 70 degrees.

Further, the dyed layer absorbs at least light having a wavelength of 380 nm to 780 nm.

Further, the first skin layer comprises at least one layer of material; and/or the second skin layer comprises at least one layer of material.

Further, the first surface layer at least comprises a carbon layer; and/or the second skin layer comprises at least a carbon layer.

Further, the main body portion has one of an annular structure, a square annular structure, and a triangular annular structure.

Further, the main body portion includes one of a polyethylene terephthalate layer and a polyimide layer.

Further, the dyed layer is composed of two materials.

Furthermore, the diameter A of the inner side surface of the shading sheet is more than or equal to 0.1 mm and less than or equal to 15 mm; the diameter B of the outer side surface of the shading sheet is more than or equal to 0.3 mm and less than or equal to 15 mm; the difference C between the lateral side and the medial side is greater than or equal to 0.2 mm and less than or equal to 10 mm.

Further, the thickness D of the first surface layer is more than or equal to 1 micron and less than or equal to 10 microns; the thickness E of the second surface layer is more than or equal to 1 micrometer and less than or equal to 10 micrometers; the thickness F of the body portion is 5 micrometers or more and 50 micrometers or less.

By applying the technical scheme of the utility model, the shading sheet is provided with an object side surface and an image side surface along the optical axis direction, the shading sheet comprises a main body part, a first surface layer and a second surface layer, the main body part is provided with a hollow structure, at least a dyeing layer is arranged on the side wall of the hollow structure, and the surface of the dyeing layer extends upwards from the object side surface of the main body part to the image side surface of the main body part in an inclined manner; the first surface layer is attached to the object side surface; the second surface layer is attached to the surface of the image side, and the inner side surface of the first surface layer, the inner side surface of the second surface layer and the surface of the dyeing layer are all on the same plane.

The side wall of the hollow structure is provided with the dyeing layer, so that light emitted into the dyeing layer is absorbed, the back-and-forth reflection of the light on the side wall of the hollow structure is reduced, and the generation of stray light is reduced. First top layer and second top layer homoenergetic absorption are penetrated into the light on first top layer and the second top layer to reduce the reflection to light, and then greatly reduced stray light's production. The surface of the dyeing layer is set to be the inclined plane, so that light rays which are emitted onto the dyeing layer and cannot be absorbed are reflected into the hollow structure, and then do not interfere with the shading sheet, and the generation of stray light is further reduced.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a light-shielding sheet according to an alternative embodiment of the present invention; and

FIG. 2 is a diagram showing the positional relationship between incident light and reflected light of the light-shielding sheet of FIG. 1;

FIG. 3 shows a schematic structural view of the body portion of FIG. 1;

fig. 4 is a thickness relationship diagram of the main body portion, the first surface layer, and the second surface layer of the light-shielding sheet in fig. 1.

Wherein the figures include the following reference numerals:

10. a main body portion; 11. a hollow structure; 12. a dyeing layer; 20. a first skin layer; 30. a second skin layer.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the light-shielding sheet in the prior art has stray light, the utility model provides a light-shielding sheet.

As shown in fig. 1 to 4, the light-shielding sheet has an object-side surface and an image-side surface along an optical axis, the light-shielding sheet includes a main body 10, a first surface layer 20 and a second surface layer 30, the main body 10 has a hollow structure 11, at least a side wall of the hollow structure 11 is provided with a dyed layer 12, and a surface of the dyed layer 12 extends obliquely upward from an object-side surface of the main body 10 to an image-side surface of the main body 10; the first surface layer 20 is attached to the object side surface; the second surface layer 30 is attached to the image-side surface, and the inner surface of the first surface layer 20, the inner surface of the second surface layer 30 and the surface of the dyed layer 12 are all in the same plane.

The side wall of the hollow structure 11 is provided with the dyeing layer 12, so that light incident on the dyeing layer 12 is absorbed, the back and forth reflection of the light on the side wall of the hollow structure 11 is reduced, and the generation of stray light is reduced. Both the first surface layer 20 and the second surface layer 30 can absorb light incident on the first surface layer 20 and the second surface layer 30, so as to reduce reflection of light rays, thereby greatly reducing generation of stray light. By arranging the surface of the dyed layer 12 as an inclined surface, light rays which are incident on the dyed layer 12 and cannot be absorbed can be reflected into the hollow structure 11, and then do not interfere with the light shielding sheet, so as to further reduce the generation of stray light.

The first skin layer 20 and the second skin layer 30 each have a hollow structure, and the inner surface of the first skin layer 20 and the inner surface of the second skin layer 30 each refer to a side wall surface of the hollow structure.

Specifically, the inclination angle a of the surface of the dyed layer 12 is 20 degrees or more and 70 degrees or less. The arrangement can ensure the convenience of processing and simultaneously ensure the effect of eliminating stray light.

As shown in fig. 2, the light is emitted toward the dyed layer 12 at an incident angle b and then emitted at an exit angle c, so that the light is reflected into the hollow structure 11.

In this embodiment, the surface of the dyed layer 12 is set to be a slope, so that the contact area of the dyed layer 12 with light can be increased, and more light can be absorbed.

It should be noted that, the light with the incident angle smaller than the inclined angle a of the surface of the dyed layer 12 is reflected into the hollow structure 11, and does not interact with the light shielding sheet any more, so as to eliminate the stray light. The angle of inclination of the surface of the dyed layer 12 can be designed according to the use requirements of a specific shade.

Specifically, the dyed layer 12 absorbs at least light having a wavelength of 380 nm to 780 nm. Since the stray light is mainly generated in the visible light band, the dyed layer 12 absorbs the light in the visible light band, so that the stray light can be greatly reduced, and the shading efficiency of the shading sheet is improved.

Optionally, first skin layer 20 comprises at least one layer of material; and/or second skin 30 includes at least one layer of material. The multiple layers of materials can increase the light absorption capability, thereby reducing the generation of stray light.

Specifically, the first surface layer 20 includes at least a carbon layer; and/or second skin layer 30 includes at least a carbon layer. The carbon layer has good light absorption capacity and can absorb visible light so as to reduce the generation of stray light and further increase the imaging quality of the lens.

In the present embodiment, the main body portion 10 has one of an annular structure, a square annular structure, and a triangular annular structure. The main body 10 only needs to have the hollow structure 11 to allow light to pass through, and does not block the light. The shape of the main body 10 may be an annular structure, a square annular structure, or a triangular annular structure, but the shape of the main body 10 is not limited thereto, and may be a polygonal annular structure, and it is only necessary that the light shielding sheet be attached to the lens barrel so as to allow light to pass therethrough.

In the present embodiment, the main body portion 10 includes one of a polyethylene terephthalate layer and a polyimide layer. The main body portion 10 is high in mechanical strength and not prone to deformation, and the thickness of each position is more uniform, so that the main body portion 10 is easier to process.

In this embodiment, the dyed layer 12 is composed of two materials.

In the present application, the main body 10 is coated with the coloring agent, and a part of the coloring agent penetrates into the main body 10, and the coloring agent on the outside of the main body 10 and the part of the main body 10 penetrated with the coloring agent constitute the colored layer 12. The dyed layer 12 is composed of two materials in this application means that the dyeing agent is one material and the main body portion 10 is one material, and does not mean a new material formed after the dyeing agent is infiltrated into the main body portion 10.

It should be noted that the dyed layer 12 is black, and black has good ability to absorb light and poor ability to reflect light, so as to reduce the generation of stray light.

In this embodiment, the diameter a of the inner side surface of the light-shielding sheet is greater than or equal to 0.1 mm and less than or equal to 15 mm; the diameter B of the outer side surface of the shading sheet is more than or equal to 0.3 mm and less than or equal to 15 mm; the difference C between the lateral side and the medial side is greater than or equal to 0.2 mm and less than or equal to 10 mm. The arrangement ensures that the light shielding sheet can not shield the light rays of the image, but only can absorb stray light so as to reduce the generation of the stray light. In addition, the arrangement is convenient for the molding manufacture of the shading sheet.

As shown in fig. 3, the first cover sheet 20, the body 10 and the second cover sheet 30 have the same shape, the inner surface diameter of the body 10 is the inner surface diameter a of the shade, and the outer surface diameter of the body 10 is the outer surface diameter B of the shade.

In this embodiment, the thickness D of the first surface layer 20 is not less than 1 micrometer and not more than 10 micrometers; the thickness E of the second skin layer 30 is not less than 1 micrometer and not more than 10 micrometers; the thickness F of the body portion 10 is 5 micrometers or more and 50 micrometers or less. The efficiency that the anti-dazzling screen absorbs light can be guaranteed to the setting like this, and the mechanical strength of anti-dazzling screen can be satisfied, and then the stability of anti-dazzling screen work can be guaranteed.

In this embodiment, the dyed layer 12 is dyed on the main body 10 by a dyeing agent, and there are two ways for dyeing the main body 10, namely, dyeing the main body 10 and then connecting the first surface layer 20, the main body and the second surface layer 30. In another alternative, the first surface layer 20, the main body 10 and the second surface layer are stacked, and the side wall of the hollow structure 11 of the main body 10 is dyed to form the dyed layer 12.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A light-shielding sheet having an object-side surface and an image-side surface in an optical axis direction, comprising:

a main body part (10), wherein the main body part (10) is provided with a hollow structure (11), at least the side wall of the hollow structure (11) is provided with a dyed layer (12), and the surface of the dyed layer (12) extends upwards from the object side surface of the main body part (10) to the image side surface of the main body part (10) in an inclined mode;

a first skin layer (20), the first skin layer (20) being attached to the object side surface;

the second surface layer (30) is attached to the image side surface, and the inner side surface of the first surface layer (20), the inner side surface of the second surface layer (30) and the surface of the dyeing layer (12) are on the same plane.

2. The shading sheet according to claim 1, wherein the inclination angle a of the surface of the dyed layer (12) is 20 degrees or more and 70 degrees or less.

3. A shading sheet according to claim 1, wherein the dyed layer (12) absorbs at least light having a wavelength of 380 nm to 780 nm.

4. The shade according to claim 1,

the first skin layer (20) comprises at least one layer of material; and/or

The second skin layer (30) comprises at least one layer of material.

5. The shade according to claim 1,

the first skin layer (20) comprises at least a carbon layer; and/or

The second skin layer (30) comprises at least a carbon layer.

6. The shade according to claim 1, wherein the main body portion (10) is one of a circular ring structure, a square ring structure, and a triangular ring structure.

7. A shading sheet according to claim 1, wherein the main body portion (10) comprises one of a polyethylene terephthalate layer, a polyimide layer.

8. A gobo according to claim 1, characterised in, that the dyed layer (12) consists of two materials.

9. The shading sheet according to any one of claims 1 to 8,

the diameter A of the inner side surface of the shading sheet is more than or equal to 0.1 mm and less than or equal to 15 mm;

the diameter B of the outer side surface of the shading sheet is more than or equal to 0.3 mm and less than or equal to 15 mm;

the difference C between the lateral side and the medial side is greater than or equal to 0.2 mm and less than or equal to 10 mm.

10. The shading sheet according to any one of claims 1 to 8,

the thickness D of the first surface layer (20) is greater than or equal to 1 micrometer and less than or equal to 10 micrometers;

the thickness E of the second surface layer (30) is greater than or equal to 1 micrometer and less than or equal to 10 micrometers;

the thickness F of the main body part (10) is not less than 5 micrometers and not more than 50 micrometers.