A high-precision multi-dimensional adjustable optical precision coupling system

Abstract

The present invention provides a high-precision multi-dimensional adjustable optical precision coupling system, which solves the problem that in existing space high-energy particle detection experiments, the CMOS camera and the fiber optic microplate adopt a common fixed structure, and the microhole alignment accuracy cannot meet the micron level. The system includes a microplate mounting structure mounted on the side plate of the HERD box body, a fiber optic microplate mounted on the microplate mounting structure, a microplate adjustment structure mounted on the HERD box body and located outside the side plate, and an integrated image intensifier mounted outside the HERD box body; the microplate mounting structure includes a microplate mounting frame, a microplate adjustment cylinder, a pressing plate, N springs and N adjusting screws. The N adjusting screws respectively pass through the N springs, the pressing plate, the microplate adjustment cylinder and are connected to the microplate mounting frame, and the fiber optic microplate installed in the microplate adjustment cylinder is mounted on the microplate mounting frame; the microplate adjustment structure adjusts the position of the microplate adjustment cylinder to achieve precise alignment of the microholes of the fiber optic microplate and the integrated image intensifier.

Description

Technical Field

[0001] The present invention belongs to the technical field of space high-energy cosmic radiation detection facilities, and particularly relates to a high-precision multi-dimensional adjustable optical precision coupling system for realizing the alignment of the fiber micro-hole plate and the micro-holes in the integrated image intensifier. Background Art

[0002] The space high-energy cosmic radiation detection facility (HERD) needs to conduct beam experiments. The core of the beam experiment is to use known high-energy particles as inputs to verify the design scheme, verify design indicators such as energy resolution and angular resolution, and lay a solid foundation for project approval and engineering development.

[0003] The main scientific objectives of the HERD project are: to search for dark matter with unprecedented sensitivity and make a key contribution to solving one of the most important mysteries in astronomy and physics, the dark matter problem; to explore the century-old mystery of the origin of cosmic rays and hopefully achieve a revolutionary breakthrough in cosmic ray physics; to carry out high-sensitivity high-energy gamma-ray sky surveys, research on pulsar navigation systems and technologies, and high-sensitivity gamma-ray polarization observations.

[0004] Generally, in the detection experiment of space high-energy particles, a CMOS camera and a fiber optic panel are jointly installed on the large box body of the high-energy cosmic radiation detection facility (HERD). The CMOS camera is installed on the side plate of the HERD box body and passes through the wall. The front-end coupled imaging system extends into the box body, and the fiber optic panel is installed at the very front of the CMOS camera. When the CMOS camera works, the light cone imaging surface of the coupled imaging system (the coupled imaging system belongs to a part of the CMOS camera) composed of the front-end image intensifier and the light cone combination assembly can be considered as an optical glass surface, and it only needs to be aligned with the overall fiber optic panel opposite. The alignment accuracy is in the order of millimeters. The light cone surface at the front end is coupled with the imaging surface of the fiber optic panel, and the accuracy requirement can be achieved through mechanical structure assembly.

[0005] As the demand for dark matter detection and HERD research develops and deepens, the fiber optic panel is changed to a fiber optic microporous plate (multiple optical fibers are inserted on the fiber optic microporous plate), and a new integrated image intensifier is designed. The front end of the large light cone of the integrated image intensifier is designed with micropores that match the fiber optic microporous plate. Both contain multiple groups of micropores with a diameter of 350μm. In the detection experiment of high-energy particles in space, the CMOS camera and the fiber optic microporous plate are installed together on the large box of the High Energy Cosmic Radiation Detection Facility (HERD), and the fiber optic microporous plate is installed on the inside of the side panel of the HERD box, and the CMOS camera is installed on the outside of the side panel of the HERD box. Before the formal test, the position of the fiber optic microporous plate needs to be adjusted due to the deviation of the parts caused by transportation vibration. However, after the fiber optic microporous plate and internal facilities are installed, the overall structure of the HERD box will be completely closed. The cover of the box is very heavy and cannot be opened by manpower. It needs to be operated with the help of a crane, which is cumbersome. In addition, the light cone surface at the front end of the CMOS camera needs to be precisely coupled with the optical fiber micro-hole plate on the opposite side. During operation, the micro-holes must be aligned one by one, and the three-dimensional direction requires a precision alignment of 7um±2μm.

[0006] The commonly used fixed mechanical assembly structure cannot meet the precision requirements of the μm level. In addition, the overall weight of the CMOS camera is large, and it is impossible to adjust the CMOS camera to achieve the micro-hole alignment of the optical fiber micro-hole plate and the front end of the integrated image intensifier. Therefore, it is urgent to design an adjustment device with an adjustment accuracy of μm to achieve the alignment of the optical fiber micro-hole plate and the front end light cone of the integrated image intensifier structure. Summary of the invention

[0007] In order to solve the technical problem that in existing space high-energy particle detection experiments, the CMOS camera and the optical fiber micro-hole plate adopt a common fixed mechanical assembly structure, and the micro-hole alignment accuracy cannot meet the μm level, the present invention provides a high-precision multi-dimensional adjustable optical precision coupling system.

[0008] To achieve the above purpose, the technical solution provided by the present invention is:

[0009] A high-precision multi-dimensional adjustable optical precision coupling system, which is special in that it includes: a micro-perforated plate mounting structure mounted on the side panel of a HERD box, an optical fiber micro-perforated plate mounted on the micro-perforated plate mounting structure, a micro-perforated plate adjustment structure mounted on the HERD box and located outside the side panel, and an integrated image intensifier mounted outside the HERD box and coordinated with the optical fiber micro-perforated plate;

[0010] The microplate mounting structure includes a microplate mounting frame, a microplate adjusting cylinder, a pressing plate, N springs and N adjusting screws, where N is an integer greater than 2;

[0011] The microplate mounting frame is a hollow structure, which is used to be mounted on the side plate of the HERD box, and an annular boss is provided on the inner wall of one end thereof close to the integrated image intensifier;

[0012] The microplate adjustment tube is inserted through one end of the microplate mounting frame provided with an annular boss, and the end away from the integrated image intensifier is provided with a mounting flange in contact with the end surface of the annular boss;

[0013] The mounting flange is provided with at least two circumferentially arranged positioning holes and N circumferentially arranged mounting openings, and the positioning holes and the mounting openings are staggered along the circumference of the mounting flange;

[0014] The pressure plate is arranged on a side of the mounting flange away from the integrated image intensifier;

[0015] The optical fiber microporous plate is installed in the microporous plate adjustment cylinder;

[0016] N adjusting screws are respectively passed through N springs, the pressure plate, and N mounting openings on the mounting flange and connected to the annular boss, and the optical fiber microporous plate installed on the microporous plate adjustment cylinder is installed on the microporous plate mounting frame, and the adjusting screws and the mounting openings are clearance-matched;

[0017] A notch is provided at the position where the annular boss cooperates with the positioning hole;

[0018] The micro-porous plate adjustment structure includes an adjustment frame group installed on the HERD box and located on the outside of the side plate, and a toggle member arranged on the adjustment frame group, and the toggle member is provided with a positioning column for passing through the notch and extending into the positioning hole; the adjustment frame group is used to drive the toggle member to move up and down, move horizontally, and rotate along the circumferential direction of the micro-porous plate adjustment cylinder, so that the boss on the toggle member drives the micro-porous plate adjustment cylinder to move, thereby realizing precise alignment of the micropores of the optical fiber micro-porous plate on the micro-porous plate adjustment cylinder and the optical fiber cone micropores of the integrated image intensifier.

[0019] Furthermore, the mounting opening is a radial through-notch provided on the outer annular surface of the mounting flange.

[0020] Furthermore, the N is 4.

[0021] Furthermore, the pressing plate includes two annular support plates, and there is a distance between the two annular support plates, and each annular support plate is provided with two mounting holes for two adjusting screws to pass through;

[0022] The positioning holes are two evenly distributed along the circumference of the mounting flange and are respectively located between the two annular support plates.

[0023] Furthermore, one end of the microplate mounting frame away from the integrated image intensifier is provided with a connecting flange for connecting to the inner wall of the side plate of the HERD box.

[0024] Further, the adjustment frame group includes a horizontal direction adjustment frame for installation on the side plate of the HERD box, a vertical direction adjustment frame arranged on the horizontal direction adjustment frame, and a circumferential direction adjustment frame arranged on the vertical direction adjustment frame;

[0025] The toggle member is arranged on the circumferential direction adjustment frame.

[0026] Furthermore, a height pad or a fourth adjustment frame is provided on the lower surface of the horizontal adjustment frame, and the fourth adjustment frame is used to achieve adjustment on the same horizontal plane as the horizontal adjustment frame, and the adjustment direction is perpendicular to the adjustment direction of the horizontal adjustment frame.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] 1. The microporous plate installation structure of the system of the present invention can realize the installation of the optical fiber microporous plate on the side panel of the HERD box, and the microporous plate adjustment structure located outside the HERD box can realize the adjustment of the position of the microporous plate adjustment tube, and then the adjustment of the position of the optical fiber microporous plate on the microporous plate adjustment tube, so as to realize the precise alignment of the micropores of the optical fiber microporous plate on the microporous plate adjustment tube and the optical fiber cone micropores of the integrated image intensifier; the present invention can be operated outside the HERD box, and the toggle member is driven to move only by adjusting the frame group, which is easy to operate.

[0029] 2. The adjusting screw of the present invention is provided with a spring, which applies a force to the pressure plate to press the microplate adjusting cylinder onto the microplate mounting frame, but it is not locked and there is a certain degree of adjustment freedom, so the microplate adjusting cylinder can be adjusted in the circumferential and axial directions.

[0030] 3. To facilitate installation, the pressure plate of the present invention includes two annular support plates, and the positioning hole is located between the two annular support plates to prevent the positioning column on the toggle member from passing through the positioning hole and applying a thrust to the pressure plate to affect the adjustment freedom of the optical fiber microporous plate, and to prevent the positioning column from passing through the positioning hole and causing damage to the pressure plate.

[0031] 4. In order to compensate for the height difference, the present invention sets a height pad between the side plate of the HERD box and the horizontal adjustment frame, and the center heights of the toggle member and the optical fiber microporous plate are basically consistent by fine-tuning the height pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the assembly of the embodiment of the high-precision multi-dimensional adjustment optical precision coupling system of the present invention, the HERD box, and the CMOS camera Figure 1 ;

[0033] Figure 2 Schematic diagram of the assembly of the embodiment of the high-precision multi-dimensional adjustment optical precision coupling system of the present invention, the HERD box, and the CMOS camera Figure 2(showing the bottom plate and top plate of the sealing frame);

[0034] Figure 3 The structure of the high-precision multi-dimensional optical precision coupling system of the present invention is shown in FIG. Figure 1 ;

[0035] Figure 4 The structure of the high-precision multi-dimensional optical precision coupling system of the present invention is shown in FIG. Figure 2 ;

[0036] Figure 5 Schematic diagram of the micro-plate installation structure in an embodiment of the present invention (spring is not shown);

[0037] Figure 6 A schematic diagram of a microplate adjustment structure in an embodiment of the present invention;

[0038] Figure 7 An exploded schematic diagram of a microporous plate adjustment structure in an embodiment of the present invention;

[0039] The reference numerals are as follows:

[0040] 1-microplate mounting structure, 11-microplate mounting frame, 111-annular boss, 1111-notch, 12-microplate adjusting cylinder, 121-mounting flange, 1211-positioning hole, 1212-mounting port, 13-pressing plate, 14-adjusting screw;

[0041] 2-orifice plate adjustment structure, 20-adjustment frame group, 21-horizontal adjustment frame, 211-horizontal adjustment frame adjustment knob, 22-upper and lower adjustment frame, 221-upper and lower adjustment frame adjustment knob, 23-circumferential adjustment frame, 231-circumferential adjustment frame adjustment knob, 24-sliding piece, 241-positioning column, 25-high and low pads;

[0042] 3-sealing frame, 31-bottom plate;

[0043] 4-CMOS camera, 41-integrated image intensifier;

[0044] 51-side panel;

[0045] 6-Fiber optic microplate. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] In the ground beam experiment equipment of the space high-energy cosmic radiation detection facility (HERD) for the space project, it is necessary to three-dimensionally align two optical micropore structures (the fiber optic micropore plate 6 and the integrated image intensifier 41 at the front end of the CMOS camera 4), which are located on the inner and outer sides of the box body respectively. It is not convenient for unified adjustment and the precision requirement is relatively high. Therefore, the present invention designs an adjustment structure for the fiber optic micropore plate, which can be operated outside the box body and the adjustment precision can reach the micron level to achieve the micropore alignment between the fiber optic micropore plate and the micropore of the front end of the light cone surface of the integrated image intensifier 41 structure.

[0048] As Figures 1 to 4 shown, a high-precision multi-dimensional adjustment optical precision coupling system of the present invention mainly consists of a fiber optic micropore plate 6, an integrated image intensifier 41, a micropore plate mounting structure 1 and a micropore plate adjustment structure 2. The micropore plate mounting structure 1 is mounted on the side plate 51 of the HERD box body. The fiber optic micropore plate 6 is mounted on the micropore plate mounting structure 1. The micropore plate adjustment structure 2 is mounted on the bottom plate 31 of the sealing frame 3, and the sealing frame 3 is located outside the HERD box body and is vertically connected to its side plate 51; the integrated image intensifier 41 is mounted outside the HERD box body and cooperates with the fiber optic micropore plate 6.

[0049] As Figure 5 shown, the micropore plate mounting structure 1 includes a micropore plate mounting frame 11, a micropore plate adjusting cylinder 12, a pressing plate 13, N springs and N adjusting screws 14, where N is an integer greater than 2. In this embodiment, N is taken as 4. In other embodiments, the number of N can be reasonably designed according to actual needs.

[0050] The micropore plate mounting frame 11 is a hollow structure and is mounted on the side plate 51 of the HERD box body. Specifically, one end of the micropore plate mounting frame 11 far from the integrated image intensifier 41 is provided with a connecting flange connected to the inner wall of the side plate 51 of the HERD box body, and the inner wall of the end close to the integrated image intensifier 41 is provided with an annular boss 111; the micropore plate adjusting cylinder 12 is inserted through the end of the micropore plate mounting frame 11 provided with the annular boss 111, and an installation flange 121 in contact with the end face of the annular boss 111 is arranged at the end far from the integrated image intensifier 41; two circumferentially arranged positioning holes 1211 and a plurality of circumferentially arranged installation openings 1212 are formed on the installation flange 121. The number of the installation openings 1212 is equal to that of the adjusting screws 14. The positioning holes 1211 and the installation openings 1212 are arranged in a circumferential dislocation along the installation flange 121; in this embodiment, the installation opening 1212 is a radially penetrating notch 1111 formed on the outer ring surface of the installation flange 121, and the pressing plate 13 is arranged on the side of the installation flange 121 far from the integrated image intensifier 41.

[0051] The four adjusting screws 14 are respectively passed through the four springs, the through holes on the pressure plate 13, and the four mounting ports 1212 on the mounting flange 121, and are fixed in the threaded holes on the annular boss 111, so that the optical fiber microplate 6 mounted on the microplate adjustment cylinder 12 is mounted on the microplate mounting frame 11, and the adjusting screws 14 and the mounting ports 1212 are clearance-matched; each adjusting screw 14 is sleeved with a spring, which applies a force to the pressure plate 13 to press the microplate adjustment cylinder 12 onto the microplate mounting frame 11, but It is not locked and has a certain degree of adjustment freedom, so the micro-plate adjustment tube 12 can be adjusted in the circumferential and axial directions; a notch 1111 is provided at the position where the annular boss 111 cooperates with the two positioning holes 1211, so that the positioning column 241 of the micro-plate adjustment structure 2 can pass through and be inserted into the positioning hole 1211, and then the micro-plate adjustment tube 12 and the optical fiber micro-plate 6 thereon are driven to move through the micro-plate adjustment structure 2, so as to realize the light cone coupling docking with the front end of the integrated image intensifier 41 of the CMOS camera 4.

[0052] To facilitate installation, the pressure plate 13 of this embodiment includes two annular support plates, and there is a distance between the two annular support plates. Each annular support plate is provided with two mounting holes for two adjusting screws 14 to pass through; the positioning holes 1211 are two evenly distributed along the circumference of the mounting flange 121, and are respectively located between the two annular support plates.

[0053] like Figure 6 and Figure 7 As shown, the microplate adjustment structure 2 includes an adjustment frame group 20 installed on the HERD box and located on the outside of the side plate 51, and a toggle member 24 arranged on the adjustment frame group 20. The adjustment frame group 20 consists of three adjustment frames, which are a circumferential adjustment frame 23, an up-down adjustment frame 22 and a horizontal adjustment frame 21 from top to bottom, that is, it includes a horizontal adjustment frame 21 installed on the bottom plate 31 of the sealing frame 3, an up-down adjustment frame 22 arranged on the horizontal adjustment frame 21, and a circumferential adjustment frame 23 arranged on the up-down adjustment frame 22. The toggle member 24 is arranged on the circumferential adjustment frame 23, and is provided with two positioning columns 241 for passing through the two notches 1111 on the annular boss 111 and extending into the two positioning holes 1211.

[0054] The working principle of the microplate adjustment structure 2 is:

[0055] By adjusting the adjustment frame group 20 in three directions, the driving member 24 is driven to move, so that the two positioning posts 241 on the driving member 24 respectively pass through the two notches 1111 and extend into the two positioning holes 1211. Then, the adjustment frame group 20 drives the driving member 24 to move up and down, horizontally, and rotate circumferentially along the microplate adjusting cylinder 12, so that the boss on the driving member 24 drives the microplate adjusting cylinder 12 to move, realizing the precise alignment of the micro-holes of the optical fiber microplate 6 on the microplate adjusting cylinder 12 and the optical fiber cone micro-holes of the integrated image intensifier 41.

[0056] In this embodiment, the adjustment frame group 20 adopts a step accuracy of the micron level, and the alignment accuracy of the micron level can be achieved. When the driving member 24 is connected to the circumferential direction adjustment frame 23, the installation hole is an oval hole, which can realize fine adjustment in the front and back directions; the circumferential direction adjustment frame 23, the up and down direction adjustment frame 22, and the horizontal direction adjustment frame 21 are installed and fixed through internal mating threads; when the knob of the circumferential direction adjustment frame 23 rotates, the lower half plane remains stationary, and the upper half can rotate around the center along the arc direction, and there can be a certain rotation range in both the clockwise and counterclockwise directions. When the knob of the up and down direction adjustment frame 22 rotates, a spring will be pressed inside the knob to move the uppermost board up and down. The horizontal direction adjustment frame 21 and the up and down direction adjustment frame 22 have the same working principle. There is a spring inside, and when the knob rotates, the spring deforms accordingly to realize the horizontal movement of the bearing panel.

[0057] In order to compensate for the height difference, a height adjusting pad 25 is provided between the bottom plate 31 of the sealing frame 3 and the horizontal direction adjustment frame 21. By finely adjusting the height adjusting pad 25, the center heights of the driving member 24 and the optical fiber microplate 6 can be made basically the same; in other embodiments, if space permits, the height adjusting pad 25 can be replaced with a fourth adjustment frame to realize the front and back adjustment in the vertical direction on the same horizontal plane as the horizontal direction adjustment frame 21, achieving four-dimensional adjustment.

[0058] The above is only a description of the preferred embodiment of the present invention, and does not limit the technical solution of the present invention thereto. Any deformation made by those skilled in the art based on the main technical concept of the present invention belongs to the technical scope to be protected by the present invention.

Claims

1. A high-precision multi-dimensional optical precision coupling system, Features: It comprises a micro-porous plate mounting structure (1) mounted on a side plate (51) of a HERD box, an optical fiber micro-porous plate (6) mounted on the micro-porous plate mounting structure (1), a micro-porous plate adjustment structure (2) mounted on the HERD box and located outside the side plate (51), and an integrated image intensifier (41) mounted outside the HERD box and cooperating with the optical fiber micro-porous plate (6); The microplate mounting structure (1) comprises a microplate mounting frame (11), a microplate adjusting cylinder (12), a pressing plate (13), N springs and N adjusting screws (14), wherein N is an integer greater than 2; The microplate mounting frame (11) is a hollow structure, and is used to be mounted on the side plate (51) of the HERD box, and an annular boss (111) is provided on the inner wall of one end thereof close to the integrated image intensifier (41); The microplate adjustment cylinder (12) is inserted through one end of the microplate mounting frame (11) provided with an annular boss (111), and the end away from the integrated image intensifier (41) is provided with a mounting flange (121) in contact with the end surface of the annular boss (111); The mounting flange (121) is provided with at least two circumferentially arranged positioning holes (1211) and N circumferentially arranged mounting openings (1212), and the positioning holes (1211) and the mounting openings (1212) are staggered along the circumference of the mounting flange (121); The pressure plate (13) is arranged on a side of the mounting flange (121) away from the integrated image intensifier (41); The optical fiber microporous plate (6) is installed in a microporous plate adjustment cylinder (12); N adjusting screws (14) are respectively passed through N springs, a pressure plate (13), and N mounting openings (1212) on a mounting flange (121) and connected to the annular boss (111), so that the optical fiber microporous plate (6) is mounted on a microporous plate mounting frame (11), and the adjusting screws (14) and the mounting openings (1212) are clearance-matched; A notch (1111) is provided at a position where the annular boss (111) cooperates with the positioning hole (1211); The microporous plate adjustment structure (2) comprises an adjustment frame group (20) mounted on the HERD box body and located outside the side plate (51), and a toggle member (24) arranged on the adjustment frame group (20), wherein the toggle member (24) is provided with a positioning column (241) for passing through the notch (1111) and extending into the positioning hole (1211); the adjustment frame group (20) is used to drive the toggle member (24) to move up and down, move horizontally, and rotate along the circumferential direction of the microporous plate adjustment cylinder (12), so that the boss on the toggle member (24) drives the microporous plate adjustment cylinder (12) to move, thereby achieving precise alignment of the micropores of the optical fiber microporous plate (6) on the microporous plate adjustment cylinder (12) and the optical fiber cone micropores of the integrated image intensifier (41).

2. According to claim 1, the high-precision multi-dimensional adjustable optical precision coupling system, Features: The installation opening (1212) is a radial through-notch (1111) formed on the outer annular surface of the installation flange (121).

3. According to the high-precision multi-dimensional adjustable optical precision coupling system of claim 2, Features: The N is 4.

4. According to claim 3, the high-precision multi-dimensional adjustable optical precision coupling system, Features: The pressing plate (13) comprises two annular support plates, and there is a distance between the two annular support plates, and each annular support plate is provided with two mounting holes for two adjusting screws (14) to pass through; The two positioning holes (1211) are evenly distributed along the circumference of the mounting flange (121) and are respectively located between the two annular support plates.

5. According to claim 4, the high-precision multi-dimensional adjustable optical precision coupling system, Features: One end of the microplate mounting frame (11) away from the integrated image intensifier (41) is provided with a connecting flange for connecting to the inner wall of the side plate (51) of the HERD box.

6. The high-precision multi-dimensional adjustable optical precision coupling system according to any one of claims 1 to 5, Features: The adjustment frame group (20) comprises a horizontal direction adjustment frame (21) for being mounted on a side plate (51) of a HERD box, a vertical direction adjustment frame (22) arranged on the horizontal direction adjustment frame (21), and a circumferential direction adjustment frame (23) arranged on the vertical direction adjustment frame (22); The toggle member (24) is arranged on the circumferential direction adjustment frame (23).

7. According to claim 6, the high-precision multi-dimensional adjustable optical precision coupling system, Features: A height pad (25) or a fourth adjustment frame is provided on the lower surface of the horizontal direction adjustment frame (21). The fourth adjustment frame is used to achieve adjustment on the same horizontal plane as the horizontal direction adjustment frame (21), and the adjustment direction is perpendicular to the adjustment direction of the horizontal direction adjustment frame (21).

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