Light beam splitter
By designing a reflective straight-through optical beam splitter, using the inclined surface and the structure of the plated metal film, the existing optical beam splitters have been solved in terms of beam splitting efficiency, light loss and consistency, and an efficient and stable optical beam splitting effect is achieved.
Patent Information
- Application Number
- CN202311397951.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-25
- Publication Date
- 2025-04-25
AI Technical Summary
The existing beam splitters have shortcomings in beam splitting efficiency, light loss, beam consistency and wavelength/energy stability. In particular, the reflective beam splitter has high cost and poor beam splitting direction determination, and the reflective transmission beam splitter has low beam splitting efficiency and poor consistency.
A reflective straight-through light beam splitter is designed, including a base body with a light-through hole, the incident end of the base body has an inclined surface, and the inclined surface is coated with a metal film, and the inner wall of the light-through hole is also coated with a metal film. The axis of the light-passing hole is at a certain angle to the inclined surface, which is used to adjust the reflected light angle, improve beam splitting efficiency and reduce light loss.
Efficient light beam splitting is achieved, with small light loss, good consistency between the beam splitting light and the incident light, and the stability of wavelength and energy has also been improved.
Smart Images
Figure CN119882254A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of optical devices, and in particular to an optical beam splitter. Background Art
[0002] The optical beam splitter uses the optical properties of light reflection on the surface of the medium and / or transmission in the medium to split the incident light on the device into two or more beams at a certain angle and energy. Optical beam splitters are widely used in various optical systems to realize multi-path optical research, measurement, and comparison.
[0003] There are two main types of optical beam splitters that split incident light into two beams of light: one is a reflective beam splitter, which uses light reflection. Light is incident from the intersection of two reflective surfaces of the component with a certain angle, and emerges from the two reflective surfaces to form two beams of light. A typical example is a right-angle reflective prism; the other is a reflective-transmissive beam splitter, which uses light reflection and transmission. A non-metallic dielectric reflective film is coated on the surface of an optical material that can transmit a certain wavelength band. Light is incident from the surface coated with the reflective film at a certain angle, thereby forming two beams of reflected light and transmitted light. A typical example is a semi-transparent and semi-reflective window.
[0004] Disadvantages of the prior art: The reflective beam splitter of the prior art requires both reflective surfaces to be precisely processed, polished, and surface-plated, which is costly. Changes in the angle of the incident light and the angle between the two reflective surfaces change the directions of the two beams of light formed by reflection, resulting in poor certainty in the direction of the split light. The reflective transmission beam splitter has low splitting efficiency, and the wavelength range of the two beams of light is narrower than that of the incident light, the consistency between the two is poor, the stability of the wavelength and energy is poor, and the cost is high.
[0005] Therefore, as a technical improvement, the applicant specially applies for this invention. Summary of the invention
[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides an optical beam splitter which can improve the above-mentioned deficiencies.
[0007] The invention relates to an optical beam splitter, comprising a substrate with a light-through hole, wherein the incident end of the substrate has an inclined surface; the inclined surface is plated with a metal film; and the inner wall of the light-through hole is plated with a metal film.
[0008] Furthermore, the light-through hole is used to directly pass a part of the incident light, and the direction of the outgoing light is determined.
[0009] Furthermore, the axis of the light-through hole forms a certain angle with the inclined surface, which is used to adjust the angle of reflected light.
[0010] Furthermore, the substrate is made of metal material or non-metal material.
[0011] Furthermore, the surface of the substrate is coated with a metal film to achieve light splitting.
[0012] Furthermore, the sizes of the through hole and the inclined surface, as well as the angle of the inclined surface can be various.
[0013] This patent proposes a reflective straight-through optical beam splitter, which has the following advantages: high beam splitting efficiency, small light loss, good consistency between the split light and between the split light and the incident light, and stable wavelength and energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the structure of the present invention.
[0015] Figure 2 Schematic diagram of the inner wall structure.
[0016] Illustration: 1 substrate, 2 light hole, 3 inner wall, 31 metal film, 4 inclined surface, 5 axis. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0018] like Figure 1 , 2 As shown, the present invention relates to an optical beam splitter, comprising a substrate 1 with a light-through hole, wherein the incident end of the substrate has an inclined surface 4; a metal film 41 (such as gold or silver) is plated on the inclined surface; and a metal film 31 (such as gold or silver) is plated on the inner wall of the light-through hole to reduce light loss.
[0019] As a technical improvement, the light-through hole is used to directly pass a part of the incident light, and the direction of the outgoing light beam is determined.
[0020] As a technical improvement, the axis 5 of the light-through hole forms a certain angle α with the inclined surface, which is used to select and adjust the angle of reflected light.
[0021] As a technical improvement, the substrate is made of metal materials, such as aluminum, copper, stainless steel, or non-metal materials, such as glass, ceramics, etc.
[0022] As a technical improvement, the surface of the substrate is coated with a metal film to achieve light splitting.
[0023] As a technical improvement, the sizes and apertures of the straight-through hole and the inclined surface can be various, including the angles of the inclined surface. Selecting different sizes can adjust the distribution ratio of incident light acting on the straight-through hole and the inclined surface.
[0024] Due to the structure of the through hole and the inclined surface, the energy ratio between the two beams of light can be adjusted by changing the sizes of the through hole and the inclined surface, and the angle between the axis of the through hole and the inclined surface can be selected to adjust the angle of the reflected light.
Claims
1. An optical beam splitter, characterized in that: The invention comprises a substrate with a light-through hole, wherein the incident end of the substrate has an inclined surface; the inclined surface is plated with a metal film; and the inner wall of the light-through hole is plated with a metal film.
2. The optical beam splitter according to claim 1, characterized in that: The axis of the light-through hole forms a certain angle with the inclined surface, which is used to adjust the angle of reflected light.
3. The optical beam splitter according to claim 1, characterized in that: The substrate is made of metal material or non-metal material.
4. The optical beam splitter according to claim 1, characterized in that: The surface of the substrate is coated with a metal film to achieve light splitting.
5. The optical beam splitter according to claim 1, characterized in that: The sizes of the through hole and the inclined surface, as well as the angle of the inclined surface can be various.