A dual-channel switching structure used in a large-aperture single-optical path structure

Abstract

The invention discloses a dual-channel switching structure applied to a large-aperture single optical path structure, comprising a fixed bracket, a reflector bracket and a rotary drive device; one side of the reflector bracket is connected to the fixed bracket, and the other side is provided with a reflector, and the reflector and the incident light main optical path have an angle of 45°; one side of the reflector bracket is transmission-connected to the rotary drive device, and under the drive of the rotary drive device, the other side of the reflector bracket can rotate around one side of the reflector bracket, so that the reflector moves into or out of the incident light main optical path; when the reflector moves into the incident light main optical path, the incident light beam is reflected by the reflector into a turning optical path that forms an angle of 90° with the incident light main optical path, and when the reflector moves out of the incident light main optical path, the incident light beam enters the incident light main optical path. The invention has a simple and stable design structure, accurate positioning, and small space occupation, which can greatly reduce the volume of the optical system.

Description

Technical Field

[0001] The invention relates to the technical field of detectors, and in particular to a dual-channel switching structure applied to a large-aperture single optical path structure. Background Art

[0002] The dual-channel common optical path system allows two sets of different types of detectors to share an optical path. Different imaging or detection effects can be achieved by switching channels. The two channels share an optical path with the same main optical axis, eliminating the trouble of adjusting the optical path again when switching channels. It is simple to operate and powerful. However, when the detection surface of one detector is large, an optical system with a larger beam propagation aperture is required, and the volume of the corresponding optical path switching structure will also increase exponentially, which requires the dual-channel switching structure to consider the structural volume and stability.

[0003] There are two common dual-channel design methods:

[0004] 1. Use a splitter optical path design, fix the splitter element in the optical path, and split the imaging beam into two imaging optical paths according to a certain wavelength or energy ratio, and enter the two detectors for imaging. This design method occupies a small space and has a stable structure, but it reduces the light energy of the two channels or changes the beam characteristics, which limits the imaging effect of the two channels.

[0005] 2. Adopt reflective optical path design and optical path switching structure to realize switching of all incident light beams between two channels by moving the position of the reflector in the optical path. This structure can ensure that the two channels obtain the same light energy and characteristics, but the disadvantage is that the switching structure is more complicated, the stability of the position accuracy is not good, and as the beam aperture increases, the occupied space increases exponentially. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a dual-channel switching structure applied to a large-aperture single optical path structure, which has a simple and stable design structure, accurate positioning, and small space occupation, and can greatly reduce the volume of the optical system.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A dual-channel switching structure applied to a large-aperture single-optical path structure comprises a fixed bracket, a reflector bracket and a rotation drive device; one side of the reflector bracket is connected to the fixed bracket, and the other side is provided with a reflector, and an angle of 45° is formed between the reflector and a main optical path of incident light; one side of the reflector bracket is transmission-connected to the rotation drive device, and under the drive of the rotation drive device, the other side of the reflector bracket can rotate around one side of the reflector bracket, so that the reflector moves into or out of the main optical path of incident light; when the reflector moves into the main optical path of incident light, the incident light beam is reflected by the reflector into a turning optical path that forms an angle of 90° with the main optical path of incident light, and when the reflector moves out of the main optical path of incident light, the incident light beam enters the main optical path of incident light.

[0009] Furthermore, the dual-channel switching structure also includes an upper limit structure and a lower limit structure, the upper limit structure is arranged above one side of the reflector bracket, and the lower limit structure is arranged below the other side of the reflector bracket; when the reflector bracket rotates until its upper edge contacts the upper limit structure, the reflector moves out of the main optical path of the incident light; when the reflector bracket rotates until its lower edge contacts the lower limit structure, the reflector moves into the main optical path of the incident light.

[0010] Furthermore, the upper limit structure and the lower limit structure both use positioning pins and are both fixed on the fixing bracket.

[0011] Furthermore, outer surfaces of the upper limit structure and the lower limit structure are respectively wrapped with hard plastic sleeves.

[0012] Furthermore, the reflector bracket is connected to one side of the fixed bracket, and the rotation drive device is fixed to the other side of the fixed bracket; the rotation drive device includes a drive motor, and the output shaft of the drive motor passes through the fixed bracket and is fixedly connected to one side of the reflector bracket.

[0013] Furthermore, a gasket is provided between the fixing bracket and the reflector bracket, and the output shaft of the driving motor passes through the fixing bracket and the gasket in sequence and is fixedly connected to one side of the reflector bracket.

[0014] Furthermore, a fixed shaft sleeve is sleeved on the end of the output shaft of the driving motor passing through one side of the reflector bracket.

[0015] Furthermore, a slope is provided on the other side of the reflector bracket, and the slope also has an inclination angle of 45° with the main optical path of the incident light; the reflector is fixed on the slope.

[0016] Furthermore, the fixing bracket is L-shaped, and a triangular support plate is provided between the vertical portion and the horizontal portion.

[0017] The present invention also provides a method for utilizing the dual-channel switching structure applied to a large-aperture single optical path structure, specifically:

[0018] Sending a control instruction to the rotation drive device through an external control system, and controlling the rotation drive device to drive the reflector bracket to rotate in a corresponding direction according to actual needs;

[0019] When it is necessary to realize the signal light reception of the first channel, the rotation driving device is controlled to drive the other side of the reflector bracket to rotate upward, so that the reflector is moved out of the main light path, and the incident light beam directly enters the incident light main light path, thereby realizing the signal light reception of the first channel;

[0020] When it is necessary to receive the signal light of the second channel, the rotation drive device is controlled to drive the other side of the reflector bracket to rotate downward, thereby moving the reflector into the main light path of the incident light. The incident light beam is reflected by the reflector and enters the turning light path that forms a 90° angle with the main light path of the incident light, thereby receiving the signal light of the second channel.

[0021] The beneficial effects of the present invention are: by adopting a reflective optical path structure and designing the shortest path planning, the movement trajectory of the optical path switching structure is limited to the maximum extent, the occupied space is reduced, and at the same time, a limited position structure and a stable structure are designed to ensure the control accuracy and stability of the reflector position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a dual-channel switching structure according to Embodiment 1 of the present invention;

[0023] Figure 2 It is a schematic diagram of the dual-channel switching structure in Example 2 of the present invention when the reflector moves out of the main light path;

[0024] Figure 3 Schematic diagram of the dual-channel switching structure in Example 2 of the present invention when the reflector moves into the main light path. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0026] Example 1

[0027] This embodiment provides a dual-channel switching structure applied to a large-aperture single-optical path structure, such as Figure 1As shown, it includes a fixed bracket 1, a reflector bracket 2 and a rotation drive device; one side of the reflector bracket 2 is connected to the fixed bracket 1, and the other side is provided with a reflector 3, and an angle of 45° is formed between the reflector 3 and the main optical path of the incident light; one side of the reflector bracket 2 is transmission-connected to the rotation drive device, and under the drive of the rotation drive device, the other side of the reflector bracket 2 can rotate around one side of the reflector bracket 2, so that the reflector 3 moves into or out of the main optical path of the incident light; when the reflector 3 moves into the main optical path of the incident light, the incident light beam is reflected by the reflector 3 and enters a turning optical path that forms an angle of 90° with the main optical path of the incident light, and when the reflector 3 moves out of the main optical path of the incident light, the incident light beam enters the main optical path of the incident light.

[0028] Furthermore, the dual-channel switching structure also includes an upper limit structure 4 and a lower limit structure 5, the upper limit structure 4 is arranged above one side of the reflector bracket 2, and the lower limit structure 5 is arranged below the other side of the reflector bracket 2; when the reflector bracket 2 rotates until its upper edge contacts the upper limit structure 4, the reflector 3 moves out of the main optical path of the incident light; when the reflector bracket 2 rotates until its lower edge contacts the lower limit structure 5, the reflector 3 moves into the main optical path of the incident light.

[0029] In this embodiment, the upper limit structure 4 and the lower limit structure 5 both use positioning pins and are both fixed on the fixing bracket 1 .

[0030] Furthermore, the outer surfaces of the upper limit structure 4 and the lower limit structure 5 are respectively wrapped with hard plastic sleeves 8 and 9. By wrapping with hard plastic sleeves, the friction between the upper limit structure and the lower limit structure and the reflector bracket can be reduced, which plays a role in protecting the upper limit structure and the lower limit structure and the reflector bracket and prolonging their service life.

[0031] In this embodiment, the reflector bracket 2 is connected to one side of the fixed bracket 1, and the rotation drive device is fixed to the other side of the fixed bracket 1; the rotation drive device includes a drive motor 6, and the output shaft 61 of the drive motor 6 passes through the fixed bracket 1 and is fixedly connected to one side of the reflector bracket 2. In specific production, the output shaft of the drive motor and one side of the reflector bracket can be fixedly connected by glue dispensing.

[0032] Furthermore, in this embodiment, a washer 7 is provided between the fixed bracket 1 and the reflector bracket 2, and the output shaft 61 of the drive motor 6 passes through the fixed bracket 1 and the washer 7 in sequence and is fixedly connected to one side of the reflector bracket 2. The washer can reduce the friction between the reflector bracket and the fixed bracket and improve the smoothness and stability of the reflector bracket during rotation.

[0033] Furthermore, in this embodiment, the end of the output shaft 61 of the driving motor 6 passing through one side of the reflector bracket 2 is sleeved with a fixed sleeve 8. The fixed sleeve can lock the reflector bracket, the inner gasket and the fixed bracket together, thereby ensuring the parallelism between the reflector bracket and the fixed bracket. In a specific application, the fixed sleeve can be fixed to the end of the output shaft of the driving motor by a jackscrew.

[0034] In this embodiment, the other side of the reflector bracket 2 is provided with an inclined surface 21, and the inclined surface 21 also has an inclination angle of 45° with respect to the main optical path of the incident light; the reflector 3 is fixed on the inclined surface 21. In specific applications, the fixation of the reflector and the inclined surface can be achieved by glue dispensing.

[0035] Furthermore, the fixing bracket 1 is L-shaped, and a triangular support plate 13 is provided between the vertical portion 11 and the horizontal portion 12 thereof.

[0036] Example 2

[0037] This embodiment provides a method for utilizing the dual-channel switching structure applied to a large-aperture single optical path structure, specifically:

[0038] Sending a control instruction to the rotation drive device through an external control system, and controlling the rotation drive device to drive the reflector bracket to rotate in a corresponding direction according to actual needs;

[0039] In this embodiment, when it is necessary to realize the signal light reception of the first channel, the rotation driving device is controlled to drive the other side of the reflector bracket to rotate upward, so that the reflector is moved out of the main light path, and the incident light beam directly enters the incident light main light path, thereby realizing the signal light reception of the first channel; Figure 2 As shown;

[0040] In this embodiment, when it is necessary to realize the reception of the signal light of the second channel, the rotation driving device is controlled to drive the other side of the reflector bracket to rotate downward, so that the reflector is moved into the main optical path of the incident light, and the incident light beam is reflected by the reflector and enters the turning optical path which forms an angle of 90° with the main optical path of the incident light, thereby realizing the reception of the signal light of the second channel; Figure 3 shown.

[0041] Specifically, in this embodiment, when the reflector bracket rotates upward to contact the upper limit structure or rotates downward to contact the lower limit structure, the rotation stops.

[0042] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the present invention.

Claims

1. A dual-channel switching structure applied to a large-aperture single-optical path structure, characterized in that: The invention comprises a fixed support (1), a reflector support (2) and a rotation drive device; one side of the reflector support (2) is connected to the fixed support (1), and the other side is provided with a reflector (3), wherein an angle of 45° is formed between the reflector (3) and a main optical path of incident light; one side of the reflector support (2) is transmission-connected to the rotation drive device, and under the drive of the rotation drive device, the other side of the reflector support (2) can rotate around one side of the reflector support (2), thereby allowing the reflector (3) to move into or out of the main optical path of incident light; when the reflector (3) moves into the main optical path of incident light, the incident light beam is reflected by the reflector (3) and enters a turning optical path which forms an angle of 90° with the main optical path of incident light; and when the reflector (3) moves out of the main optical path of incident light, the incident light beam enters the main optical path of incident light; The dual-channel switching structure further comprises an upper limit structure (4) and a lower limit structure (5), wherein the upper limit structure (4) is arranged above one side of the reflector bracket (2), and the lower limit structure (5) is arranged below the other side of the reflector bracket (2); when the reflector bracket (2) rotates until its upper edge contacts the upper limit structure (4), the reflector (3) moves out of the main optical path of the incident light; when the reflector bracket (2) rotates until its lower edge contacts the lower limit structure (5), the reflector (3) moves into the main optical path of the incident light; The other side of the reflector bracket (2) is provided with an inclined surface (21), and the inclined surface (21) and the main optical path of the incident light also have an inclination angle of 45°; the reflector (3) is fixed on the inclined surface (21).

2. The dual-channel switching structure applied to a large-aperture single optical path structure according to claim 1, characterized in that: The upper limit structure (4) and the lower limit structure (5) both use positioning pins and are both fixed on the fixed bracket (1).

3. The dual-channel switching structure applied to a large-aperture single optical path structure according to claim 1 or 2, characterized in that: The outer surfaces of the upper limit structure (4) and the lower limit structure (5) are respectively wrapped with hard plastic sleeves.

4. The dual-channel switching structure applied to a large-aperture single-optical path structure according to claim 1, characterized in that: The reflector bracket (2) is connected to one side of the fixed bracket (1), and the rotation drive device is fixed to the other side of the fixed bracket (1); the rotation drive device comprises a drive motor (6), and an output shaft (61) of the drive motor (6) passes through the fixed bracket (1) and is fixedly connected to one side of the reflector bracket (2).

5. The dual-channel switching structure applied to a large-aperture single-optical path structure according to claim 4, characterized in that: A washer (7) is provided between the fixed bracket (1) and the reflector bracket (2), and the output shaft (61) of the drive motor (6) passes through the fixed bracket (1) and the washer (7) in sequence and is fixedly connected to one side of the reflector bracket (2).

6. The dual-channel switching structure applied to a large-aperture single-optical path structure according to claim 4, characterized in that: The end portion of the output shaft (61) of the driving motor (6) passing through one side of the reflector bracket (2) is sleeved with a fixed shaft sleeve (8).

7. The dual-channel switching structure applied to a large-aperture single-optical path structure according to claim 1, characterized in that: The fixing bracket (1) is L-shaped, and a triangular support plate (13) is provided between the vertical portion (11) and the horizontal portion (12).

8. A method for using the dual-channel switching structure in a large-aperture single optical path structure according to any one of claims 1 to 7, characterized in that: The method is specifically as follows: Sending a control instruction to the rotation drive device through an external control system, and controlling the rotation drive device to drive the reflector bracket to rotate in a corresponding direction according to actual needs; When it is necessary to realize the signal light reception of the first channel, the rotation driving device is controlled to drive the other side of the reflector bracket to rotate upward, so that the reflector is moved out of the main light path, and the incident light beam directly enters the incident light main light path, thereby realizing the signal light reception of the first channel; When it is necessary to receive the signal light of the second channel, the rotation drive device is controlled to drive the other side of the reflector bracket to rotate downward, thereby moving the reflector into the main light path of the incident light. The incident light beam is reflected by the reflector and enters the turning light path that forms a 90° angle with the main light path of the incident light, thereby receiving the signal light of the second channel.

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