Beam separation device based on half pentaprism

Abstract

The utility model discloses a light beam separating device based on half pentaprisms, which relates to the technical field of light beam separating devices, and comprises a shell, a first half pentaprism and a second half pentaprism are arranged in the shell, the first half pentaprism is positioned above the second half pentaprism, and the second half pentaprism is positioned above the first half pentaprism. A sliding gap for a coated sheet to pass through is formed between the first half pentaprism and the second half pentaprism, and a coated sheet box is fixedly connected in the square groove. According to the light beam separation device based on the half pentaprisms, the first half pentaprism, the second half pentaprism, the sliding gap and other structures are arranged, beam splitting or combination of light paths of different wave bands can be easily achieved by matching with different coated sheets, the universality is improved, and therefore the manufacturing cost is saved, meanwhile, the coated sheets are wiped through the cleaning roller, the cleaning effect is achieved, and the working efficiency is improved. And after entering the sliding gap, the coated sheet cannot slide randomly under the extrusion action of the cleaning roller, so that the positioning effect is realized, and the use stability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of beam separation device technology, and in particular to a beam separation device based on a semi-pentagonal prism. Background Technology

[0002] A pentaprism is usually made from a single solid piece of glass that has been cut and ground. Then, a reflective material is coated on the outer surface (except for the two surfaces that are in contact with the focusing screen and the viewfinder eyepiece) to form a specular reflection inside. The reflection inside the prism is not caused by total internal reflection because the angle of the incident light at the time of reflection is less than the critical angle, which is the minimum angle for total internal reflection. Therefore, both reflective surfaces must be coated with reflective mirrors, and the incident and exit surfaces must be coated with anti-reflective films to reduce reflection.

[0003] For example, the patent entitled "A Beam Separation Device Based on a Semi-Pentagonal Prism" (patent application number: CN202121098790.3) discloses a beam separation device based on a semi-pentagonal prism. By bonding two semi-pentagonal prisms, a first and a second, and coating the bonding surface, beam splitting can be achieved based on the different light reflection and transmittance of different wavelength bands. This allows the light received by the objective lens group to be split into two or more paths, achieving three-way coaxial beams. This means splitting the coaxial light, or supplementing the main optical path with light emitted from a second light source or a second light-receiving sensor. The first light source or the first light-receiving sensor and the roof prism assist in beam splitting. The device is low-cost, easy to process and assemble, and the bonding surface can be combined with different coatings to easily achieve beam splitting (merging) of different wavelength optical paths, increasing the versatility of the semi-pentagonal prism and thus saving manufacturing costs. However, the coatings require disassembling the outer shell for replacement, which is cumbersome and the efficiency needs to be improved.

[0004] Therefore, it is necessary to propose a beam separation device based on a semi-pentagonal prism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a beam separation device based on a semi-pentagonal prism to solve the problem that the coating process requires disassembling the outer casing for replacement, which is cumbersome and inefficient.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a beam separation device based on a semi-pentagonal prism, comprising a housing, inside which a first semi-pentagonal prism and a second semi-pentagonal prism are disposed, the first semi-pentagonal prism being located above the second semi-pentagonal prism, and a sliding gap for a coating sheet to pass through is formed between the first and second semi-pentagonal prisms. A square groove is formed on the side wall of the housing, and a coating sheet box is fixedly connected inside the square groove, and the coating sheet box abuts against the first and second semi-pentagonal prisms. A coating sheet channel for the coating sheet to pass through is provided inside the coating sheet box, and the coating sheet channel communicates and cooperates with the sliding gap. A cleaning roller for cleaning and limiting the coating sheet is provided on the side of the coating sheet box facing away from the first semi-pentagonal prism.

[0007] Preferably, there are two cleaning rollers, and the coating sheet passes between the two cleaning rollers.

[0008] Preferably, a rotating shaft is fixedly connected to the cleaning roller, and rotating plates are fixedly connected to both ends of the rotating shaft. A rotating block is rotatably connected to the end of the rotating plate away from the rotating shaft, and a support plate is fixedly connected to the end of the rotating block away from the rotating plate. The support plate is fixedly connected to the coating film box.

[0009] Preferably, a torsion spring is fitted onto the rotating block, with one end of the torsion spring fixedly connected to the rotating plate and the other end of the torsion spring fixedly connected to the support plate.

[0010] Preferably, the interior of the housing is provided with an objective lens assembly, which cooperates with the first half-pentagonal prism. The objective lens assembly includes a support frame and an objective lens.

[0011] Preferably, a ridge prism is provided inside the outer casing.

[0012] Preferably, the outer casing is provided with light-transmitting holes.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model, by setting up a first half-pentagonal prism, a second half-pentagonal prism, and a sliding gap, can easily achieve beam splitting or merging of different wavelength optical paths by combining different coated sheets, increasing versatility and thus saving manufacturing costs. At the same time, the cleaning roller wipes the coated sheet to achieve a cleaning effect, and after the coated sheet enters the sliding gap, it will not slide randomly due to the squeezing action of the cleaning roller, achieving a positioning effect and ensuring the stability of use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the beam separation device based on a semi-pentagonal prism of this utility model.

[0016] Figure 2This is a schematic diagram of the internal structure of the beam separation device based on a semi-pentagonal prism of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the first and second half-pentagonal prisms of this utility model.

[0018] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0019] Figure 5 This is a schematic diagram of the coating sheet box and coating sheet channel structure of this utility model.

[0020] In the diagram: 1. Outer shell; 2. First half pentaprism; 3. Second half pentaprism; 4. Sliding gap; 5. Coated sheet box; 6. Coated sheet channel; 7. Cleaning roller; 8. Rotating shaft; 9. Rotating plate; 10. Rotating block; 11. Support plate; 12. Torsion spring; 13. Objective lens group; 14. Square groove; 15. Ridge prism. Detailed Implementation

[0021] This utility model provides, for example Figures 1-5 The beam separation device based on a semi-pentagonal prism shown includes a housing 1. Inside the housing 1, a first semi-pentagonal prism 2 and a second semi-pentagonal prism 3 are disposed. The first semi-pentagonal prism 2 is located above the second semi-pentagonal prism 3. A sliding gap 4 is formed between the first semi-pentagonal prism 2 and the second semi-pentagonal prism 3 for a coating sheet to pass through. The coating sheet is located in the sliding gap 4 and cooperates with the first semi-pentagonal prism 2 and the second semi-pentagonal prism 3. Different coating sheets can be used. The coating sheet can be coated with a lens and has a suitable thickness.

[0022] The housing 1 contains an objective lens group 13, which works in conjunction with the first half-pentagonal prism 2. The objective lens group 13 includes a support frame and an objective lens. The housing 1 also contains a roof prism 15 and a light-transmitting hole. In addition, it contains an observation lens group, an optical path lens, and other structures. The observation lens group, the optical path lens, and their interoperability are all common existing technologies and will not be described in detail here. With the cooperation of the above structures, the first half-pentagonal prism 2 and the second half-pentagonal prism 3 can easily achieve beam splitting or merging of different wavelength optical paths by using different coatings, increasing versatility and thus saving manufacturing costs.

[0023] To improve the efficiency of coating sheet replacement, a square groove 14 is provided on the side wall of the outer casing 1. A coating sheet box 5 is fixedly connected inside the square groove 14, and the coating sheet box 5 abuts against the first half-pentagonal prism 2 and the second half-pentagonal prism 3. The coating sheet box 5 has a coating sheet channel 6 for the coating sheet to pass through, and the coating sheet channel 6 communicates and cooperates with the sliding gap 4. In actual use, the coating sheet can be inserted into the sliding gap 4 through the coating sheet channel 6, so that the coating sheet cooperates with the first half-pentagonal prism 2 and the second half-pentagonal prism 3.

[0024] To achieve cleaning and positioning of the coated sheet, a cleaning roller 7 is provided on the side of the coated sheet box 5 facing away from the first half pentaprism 2 for cleaning and positioning the coated sheet. There are two cleaning rollers 7, and the coated sheet passes between the two cleaning rollers 7.

[0025] A rotating shaft 8 is fixedly connected to the cleaning roller 7. A rotating plate 9 is fixedly connected to both ends of the rotating shaft 8. A rotating block 10 is rotatably connected to the end of the rotating plate 9 away from the rotating shaft 8. A support plate 11 is fixedly connected to the end of the rotating block 10 away from the rotating plate 9. The support plate 11 is fixedly connected to the coating film box 5. A torsion spring 12 is fitted on the rotating block 10. One end of the torsion spring 12 is fixedly connected to the rotating plate 9, and the other end of the torsion spring 12 is fixedly connected to the support plate 11.

[0026] The rotating shaft 8 and the rotating plate 9 can be designed as a detachable structure to facilitate the replacement of the cleaning roller 7.

[0027] In actual use, the operator separates the two cleaning rollers 7, increasing the distance between them to facilitate inserting the coated sheet into the coated sheet channel 6. Then, the cleaning rollers 7 are released, and under the restoring force of the torsion spring 12, the two cleaning rollers 7 respectively adhere to the upper and lower surfaces of the coated sheet. The coated sheet is then pushed to pass through the coated sheet channel 6 into the sliding gap 4. As the coated sheet moves, friction drives the cleaning rollers 7 to rotate, wiping the coated sheet and achieving a cleaning effect. Once the coated sheet enters the sliding gap 4, it is squeezed by the cleaning rollers 7, preventing it from sliding randomly and achieving a positioning effect, thus ensuring stability during use.

Claims

1. A beam splitting device based on a half-pentaprism, comprising a housing (1), characterized in that: The inside of the shell (1) is provided with a first half five prism (2) and a second half five prism (3), the first half five prism (2) is located above the second half five prism (3), a sliding gap (4) for the coated film piece to pass through is formed between the first half five prism (2) and the second half five prism (3), a square groove (14) is formed on the side wall of the shell (1), the square groove (14) is fixedly connected with a coated film piece box (5) inside, and the coated film piece box (5) abuts on the first half five prism (2) and the second half five prism (3), the inside of the coated film piece box (5) is provided with a coated film piece channel (6) for the coated film piece to pass through, the coated film piece channel (6) is communicated and matched with the sliding gap (4), and the side of the coated film piece box (5) away from the first half five prism (2) is provided with a cleaning roller (7) for cleaning and limiting the coated film piece.

2. The half-pentaprism-based beam splitting apparatus according to claim 1, wherein: The cleaning roller (7) is provided with two, and the coated film piece passes through between the two cleaning rollers (7).

3. The half-pentaprism based beam splitting device according to claim 1, wherein: The cleaning roller (7) is fixedly connected with a rotating shaft (8), both ends of the rotating shaft (8) are fixedly connected with a rotating plate (9), one end of the rotating plate (9) away from the rotating shaft (8) is rotatably connected with a rotating block (10), one end of the rotating block (10) away from the rotating plate (9) is fixedly connected with a supporting plate (11), and the supporting plate (11) is fixedly connected on the coated film piece box (5).

4. The half-pentaprism based beam splitting device according to claim 3, wherein: The rotating block (10) is sleeved with a torsion spring (12), one end of the torsion spring (12) is fixedly connected on the rotating plate (9), and the other end of the torsion spring (12) is fixedly connected on the supporting plate (11).

5. The half-pentaprism based beam splitting device according to claim 1, wherein: The inside of the shell (1) is provided with an objective lens group (13), the objective lens group (13) is matched with the first half five prism (2), and the objective lens group (13) comprises a supporting frame and an objective lens.

6. The half-pentaprism based beam splitting device according to claim 1, wherein: The inside of the shell (1) is provided with a roof prism (15).

7. The half-pentaprism based beam splitting device according to claim 1, wherein: The shell (1) is provided with a light transmission hole.

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