Coated roof prism

Abstract

The utility model discloses a film-coated roof prism, which comprises an incident plane and a reflecting plane, one side of the incident plane is connected with one side of the reflecting plane, a first roof ridge plane and a second roof ridge plane are connected at the positions of the incident plane and the reflecting plane far away from the connecting side, and the first roof ridge plane is connected with the second roof ridge plane. The surfaces of the first roof ridge surface, the second roof ridge surface and the reflecting surface are plated with all-dielectric multilayer reflecting films, and the surfaces of the two all-dielectric multilayer reflecting films are plated with anti-oxidation layers. According to the utility model, the all-dielectric multilayer reflecting films are plated on the reflecting surface, the first ridge surface and the second ridge surface, so that the wavelength of visible light can be divided into a plurality of small wavebands, and each film is responsible for reflecting light of a specific waveband, thereby correcting a light path and improving the overall reflectivity; and external air can be isolated from the all-dielectric multilayer reflecting film, so that the service life of the prism is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, in particular to a coated roof prism. Background Art

[0002] A roof prism is a special type of optical prism characterized by two mutually perpendicular reflecting surfaces, which are called roof surfaces. The light path passes through the roof surfaces during the reflection process inside the roof prism, and then forms an image after multiple reflections. Roof prisms are often used in telescopes, periscopes, medical equipment, and as auxiliary workpieces for experimental instruments for observation.

[0003] Currently, the angle between the two roof surfaces of most roof prisms is 90°, which ensures that the two beams of light generated by the reflecting surface can overlap when returning to the incident surface, preventing ghosting during subsequent observation. However, due to machining accuracy, the angle between the roof surfaces is difficult to be accurately 90°, resulting in poor refraction efficiency of the roof prism for light. Utility Model Content

[0004] The purpose of the present invention is to provide a coated roof prism to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a coated roof prism, comprising an incident surface and a reflective surface, wherein one side of the incident surface is connected to one side of the reflective surface, a first roof surface and a second roof surface are connected to the incident surface and the reflective surface at positions away from the connecting edge, the first roof surface and the second roof surface are connected, the first roof surface, the second roof surface and the reflective surface are all coated with an all-dielectric multilayer reflective film, and both surfaces of the all-dielectric multilayer reflective films are coated with an oxidation-resistant layer.

[0006] As a further preferred embodiment of the present technical solution, two groups of holographic surfaces are provided between the reflecting surface and the incident surface, and the two groups of holographic surfaces are provided in parallel.

[0007] As a further preferred embodiment of the present technical solution, the first ridge surface and the second ridge surface are arranged in a ridge shape, and the angle between the first ridge surface and the second ridge surface is 90°.

[0008] As a further preferred embodiment of the present technical solution, the angle between the incident surface and the reflecting surface is 30°.

[0009] As a further preferred embodiment of the present technical solution, a chamfer is provided at the bottom end of the connection between the first ridge surface and the second ridge surface.

[0010] As a further preferred embodiment of the present technical solution, the outer surface of the oxidation-resistant layer is plated with a wear-resistant layer.

[0011] The utility model provides a coated roof prism, which has the following beneficial effects:

[0012] The utility model can divide the wavelength of visible light into multiple small bands by coating the reflecting surface, the first ridge surface and the second ridge surface with a full-dielectric multilayer reflective film. Each layer of the film is responsible for reflecting light in a specific band, thereby correcting the optical path and improving the overall reflectivity. Furthermore, by providing an oxidation-resistant layer, the outside air can be isolated from the full-dielectric multilayer reflective film, thereby increasing the service life of the prism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a first structural schematic diagram of the utility model as a whole;

[0014] Figure 2 It is a second structural schematic diagram of the entire utility model;

[0015] Figure 3 This is a schematic diagram of the decomposition of the structure of the all-dielectric multilayer reflective film, oxidation-resistant layer and wear-resistant layer of the utility model.

[0016] In the figure: 1. Incident surface; 2. Reflection surface; 3. First ridge surface; 4. Second ridge surface; 5. All-dielectric multilayer reflective film; 6. Oxidation-resistant layer; 7. Wear-resistant layer; 8. Chamfered edge; 9. Full reflective surface. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] The utility model provides a technical solution: Figure 1-3 As shown, in this embodiment, a coated roof prism includes an incident surface 1 and a reflecting surface 2, wherein one side of the incident surface 1 is connected to the other side of the reflecting surface 2, and the first roof surface 3 and the second roof surface 4 are connected to the incident surface 1 and the reflecting surface 2 away from the connecting edge. The first roof surface 3 and the second roof surface 4 are connected, and the surfaces of the first roof surface 3, the second roof surface 4 and the reflecting surface 2 are all coated with an all-dielectric multilayer reflective film 5, and the surfaces of the two all-dielectric multilayer reflective films 5 are all coated with an oxidation-resistant layer 6, wherein, by providing the reflecting surface 2, the light entering from the incident surface can be reflected to the first roof surface 3 or the second roof surface 4, and by providing the first roof surface 3 and the second roof surface 4, the light can be reflected to the incident surface 1, and the incident surface 1 is refracted and then emitted in parallel, and by providing the all-dielectric multilayer reflective film 5, the light can be corrected and the reflectivity can be improved. The material used for the oxidation-resistant layer 6 is polyurethane, which has excellent weather resistance, UV resistance and oxidation resistance.

[0019] like Figure 1 and Figure 2As shown, two groups of omni-reflective surfaces 9 are provided between the reflective surface 2 and the incident surface 1. The two groups of omni-reflective surfaces 9 are provided in parallel. By providing the omni-reflective surfaces 9, the structural strength can be improved and the scattered light can be stripped off, thereby improving the reflection quality.

[0020] like Figure 3 As shown, the first ridge surface 3 and the second ridge surface 4 are arranged in a ridge shape, and the angle between the first ridge surface 3 and the second ridge surface 4 is 90 degrees. By setting the angle to 90 degrees, the two light rays reflected by the reflecting surface 2 can overlap in the incident surface 1, and double images are prevented.

[0021] like Figure 1 and Figure 2 As shown, the angle between the incident surface 1 and the reflecting surface 2 is 30°, which enables the light to be refracted and turned into a horizontal state when leaving the incident surface 1.

[0022] like Figure 2 As shown, a chamfer 8 is provided at the bottom end of the connection between the first ridge surface 3 and the second ridge surface 4 to prevent damage caused by collision.

[0023] like Figure 3 As shown, the outer surface of the oxidation-resistant layer 6 is plated with a wear-resistant layer 7, which can improve the wear resistance and prevent the oxidation-resistant layer 6 from wearing out during long-term use. The wear-resistant layer 7 is a tungsten carbide coating with strong wear resistance, high hardness, dense coating and high bonding strength.

[0024] The utility model provides a coated roof prism, the specific working principle of which is as follows:

[0025] Light passes through the triangular prism and enters the interior from the incident surface 1 of the roof prism. The light moves along the medium and is dispersed into two beams after contacting the reflecting surface 2, which respectively illuminate the first roof surface 3 and the second roof surface 4. After being reflected by the first roof surface 3 and the second roof surface 4, the two light beams overlap on the incident surface and are refracted and then emitted horizontally. When the light is reflected on the reflecting surface 2, the first roof surface 3 and the second roof surface 4, the all-dielectric multilayer reflective film 5 corrects the light to prevent the light beams from accurately overlapping when returning to the incident surface 1, thereby avoiding the occurrence of ghosting.

[0026] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coated roof prism, comprising an incident surface (1) and a reflecting surface (2), characterized in that: The incident surface (1) is connected to the reflective surface (2) on one side, and the incident surface (1) and the reflective surface (2) are connected to a first ridge surface (3) and a second ridge surface (4) at positions away from the connection edge. The first ridge surface (3) and the second ridge surface (4) are connected, and the surfaces of the first ridge surface (3), the second ridge surface (4) and the reflective surface (2) are all plated with a fully dielectric multilayer reflective film (5), and the surfaces of the two fully dielectric multilayer reflective films (5) are both plated with an oxidation-resistant layer (6).

2. The coated roof prism according to claim 1, characterized in that: Two groups of total reflection surfaces (9) are arranged between the reflection surface (2) and the incident surface (1), and the two groups of total reflection surfaces (9) are arranged in parallel.

3. The coated roof prism according to claim 2, characterized in that: The first ridge surface (3) and the second ridge surface (4) are arranged in a ridge shape, and the angle between the first ridge surface (3) and the second ridge surface (4) is 90°.

4. The coated roof prism according to claim 3, characterized in that: The angle between the incident surface (1) and the reflecting surface (2) is 30°.

5. The coated roof prism according to claim 4, characterized in that: A chamfer (8) is provided at the bottom end of the connection between the first ridge surface (3) and the second ridge surface (4).

6. The coated roof prism according to claim 1, characterized in that: The outer surface of the oxidation-resistant layer (6) is plated with a wear-resistant layer (7).

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