CN215769093U

CN215769093U - Three-color light splitting prism

Info

Publication number: CN215769093U
Application number: CN202121919399.5U
Authority: CN
Inventors: 陈俊杰; 高传
Original assignee: Fuzhou Rising Electro Optics Co ltd
Current assignee: Fuzhou Rising Electro Optics Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-02-08
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to the technical field of machine vision, in particular to a three-color light splitting prism which comprises a first prism block, a second prism block and a third prism block which are sequentially arranged from bottom to top, wherein an air interval is formed between an S surface above the first prism block and an S5 surface below the second prism block. In the utility model, a first prism block, a second prism block and a third prism block which are arranged from bottom to top are used as a structure of the light splitting prism, wherein an incident surface S1 and an emergent surface S3 of the first prism block are respectively plated with an antireflection film, a surface S2 at the gluing part of the first prism block and the second prism block is plated with a beam splitting film, a surface S5 at the gluing part of the second prism block and the first prism block is plated with an antireflection film, a surface S6 of the second prism block is plated with a beam splitting film, and a surface S7 of the second prism block is plated with an antireflection film, so that the problem of splitting a visible light beam into light with the wavelengths of 440nm-660nm, 735nm and 780nm can be realized.

Description

Three-color light splitting prism

Technical Field

The utility model relates to the technical field of machine vision, in particular to a three-color light splitting prism.

Background

The beam splitting prism is a prism capable of splitting light into a plurality of beams of light with different wavelengths, generally composed of one or more prisms, and can select the required light with different wavelengths by coating different optical films on the surface of the prism to reflect, refract and transmit the light.

The three-color beam splitter prism is widely applied to the optical field, but the existing beam splitter prism can not solve the problem of splitting visible light into light with the wavelengths of 440nm-660nm, 735nm and 780nm, so a three-color beam splitter prism is provided for solving the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a three-color light splitting prism, which uses a first prism block, a second prism block and a third prism block which are sequentially arranged from bottom to top as a structure of the light splitting prism, wherein an incident surface S1 and an emergent surface S3 of the first prism block are respectively plated with an antireflection film, a surface S2 at the gluing part of the upper part of the first prism block and the second prism block is plated with a beam splitting film, a surface S5 at the gluing part of the lower part of the second prism block and the first prism block is plated with an antireflection film, a surface S6 of a gluing surface of the second prism block is plated with a beam splitting film, and a surface S7 of the second prism block is plated with an antireflection film, so that the problem of splitting visible light into light beams with wavelengths of 440nm-660nm, 735nm and 780nm can be realized, and the problem provided in the background technology can be solved.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a three-color light beam splitting prism, includes first prism block, second prism block and the third prism block that sets gradually from down up, and there is the air interval the S face of first prism block top and the S5 face of second prism block below, and the S6 face of second prism block and third prism block below is the cemented surface.

Preferably, the incident surface S1 and the exit surface S3 of the first prism block are coated with antireflection films.

Preferably, the surface S2 on the first prism block and the second prism block are glued together is coated with the beam splitting film.

Preferably, an antireflection film is coated on the surface S5 of the part, glued with the first prism block, below the second prism block.

Preferably, the gluing surface S6 surface of the second prism block is coated with a beam splitting film, and the emergent surface S7 surface of the second prism block is coated with an antireflection film.

Preferably, the exit surface S10 of the third prism block is coated with an antireflection film.

Compared with the prior art, the utility model has the beneficial effects that: the first prism block, the second prism block and the third prism block which are arranged from bottom to top are used as a structure of the light splitting prism, wherein an incident surface S1 and an emergent surface S3 of the first prism block are respectively plated with an antireflection film, a surface S2 at the position, bonded with the second prism block, above the first prism block is plated with a beam splitting film, a surface S5 at the position, bonded with the first prism block, below the second prism block is plated with an antireflection film, a bonded surface S6 of the second prism block is plated with a beam splitting film, and an emergent surface S7 of the second prism block is plated with an antireflection film, so that the problem that visible light beams are divided into light with wavelengths of 440-660 nm, 735nm and 780nm can be realized.

Drawings

FIG. 1 is a schematic plane view of a three-color light splitting prism according to the present invention;

fig. 2 is a light path diagram of a three-color light splitting prism according to the present invention.

In the figure: 1. a first prism block; 2. a second prism block; 3. a third prism section.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention 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 utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the present invention.

Example (b):

referring to fig. 1-2, the present embodiment provides a technical solution:

the utility model provides a three-color light beam splitting prism, includes from down first prism block 1, second prism block 2 and the third prism block 3 that up sets gradually, there is the air interval on the S2 face of first prism block 1 top and the S5 face of second prism block 2 below, and the thickness of air interval is 0.01-0.015mm, and the S6 face of second prism block 2 and third prism block 3 below is the cemented surface.

The incident surface S1 and the emergent surface S3 of the first prism block 1 are plated with antireflection films, the surface S2 above the first prism block 1 and glued with the second prism block 2 is plated with a beam splitting film, the surface S5 below the second prism block 2 and glued with the first prism block 1 is plated with an antireflection film, the surface S6 of the glued surface of the second prism block 2 is plated with a beam splitting film, the surface S7 of the emergent surface S7 of the second prism block 2 is plated with an antireflection film, and the surface S10 of the emergent surface S10 of the third prism block 3 is plated with an antireflection film.

The first prism block 1, the second prism block 2 and the third prism block 3 are all made of H-K9L glass, and parameters of the prism blocks are as follows:

in the first prism block 1, the incident surface is rectangular, the length is 40mm, the width is 35mm, the cross section (bottom surface of a triangular prism) is triangular, and the angles of three angles are 27.5 °, 55 ° and 97.5 ° respectively.

In the second prism block 2, the exit surface is rectangular, the length is 40mm, the width is 14mm, the cross section (base surface of a triangular prism) is triangular, and the three angle angles are 54.5 °, 41 °, and 84.5 °, respectively.

In the third prism block 3, the exit surface is rectangular, the length is 40mm, the width is 15mm, the cross section (the bottom surface of the quadrangular prism) is trapezoidal, and the angles of four angles are 90 degrees, 103.5 degrees and 76.5 degrees respectively.

As shown in fig. 2, visible light enters from the S1 surface and is split into two beams by the S2 beam splitting film surface, one beam is reflected and then emits light with a wavelength of 440nm to 660nm from the exit surface S3, the other beam is split into two beams by the S6 beam splitting film surface, one beam is reflected and then emits light with a wavelength of 735nm from the exit surface S7, and the other beam emits light with a wavelength of 780nm from the exit surface S10.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a three-color light beam splitting prism, includes first prism block (1), second prism block (2) and third prism block (3) that up set gradually down, its characterized in that: an air space is formed between the S2 surface above the first prism block (1) and the S5 surface below the second prism block (2), and the S6 surface below the second prism block (2) and the third prism block (3) is a gluing surface.

2. A three-color beam splitter prism as defined in claim 1, wherein: and the incident surface S1 and the emergent surface S3 of the first prism block (1) are both plated with antireflection films.

3. A three-color beam splitter prism as defined in claim 1, wherein: and a beam splitting film is plated on the surface S2 glued with the second prism block (2) above the first prism block (1).

4. A three-color beam splitter prism as defined in claim 1, wherein: and an antireflection film is plated on the surface S5 at the gluing position of the second prism block (2) and the first prism block (1).

5. A three-color beam splitter prism as defined in claim 1, wherein: and a beam splitting film is plated on the gluing surface S6 surface of the second prism block (2), and an antireflection film is plated on the emergent surface S7 surface of the second prism block (2).

6. A three-color beam splitter prism as defined in claim 1, wherein: and the exit surface S10 of the third prism block (3) is plated with an antireflection film.