An assembly method for realizing high-precision pointing of a multi-optical-axis assembly

Abstract

The application discloses an assembly method for realizing high-precision pointing of a multi-optical-axis assembly, and comprises the following steps: S1, designing and processing an optical base plate; S2, drilling pin holes for positioning on the optical base plate, and determining a reference axis by using the pin holes and the optical base plate; S3, debugging lenses of optical assemblies; S4, mounting a reference lens assembly on the optical base plate, and adjusting the mounting angle and posture of the reference lens assembly, so that the front surface normal line of the reference lens assembly is parallel to the reference axis; S5, transferring the reference axis through the reference lens assembly; S6, mounting each optical assembly, and adjusting the posture of each optical assembly based on the transferred reference axis; and S7, mounting the assembled multi-optical-axis assembly to a whole-satellite mounting surface through the pin holes, and obtaining the pointing of the optical axes of each optical assembly through coordinate conversion. The method improves the pointing precision of the multi-optical-axis system, and realizes simple mounting, repeated dismounting and the like under the premise of ensuring the pointing precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical measurement, in particular to a high-precision pointing assembly method of a multi-optical-axis assembly. BACKGROUND

[0002] With the continuous development of space technology and electronic computer technology, laser baseline measurement technology is also becoming mature. Laser baseline measurement technology is mainly used to complete the measurement of multiple parameters of the length, inclination angle, yaw angle and antenna attitude angle of the baseline. When using laser interference, laser collimation and laser fine beam displacement detection principle to complete the high-precision measurement of the length, relative inclination angle, relative yaw angle and antenna relative attitude information (roll angle, pitch angle and yaw angle) of the target physical baseline, the key technologies involved include high-precision laser single-frequency interference length measurement technology, high-precision autocollimator angle measurement technology and multi-degree-of-freedom measurement parameter calibration fusion technology. The above methods have the characteristics of simple principle, high precision and high reliability. In this process, the implementation of multi-optical-axis high-precision pointing is involved.

[0003] Currently, there are two methods for optical axis calibration and measurement. One is to introduce the optical axis through a cube mirror, and then determine the spatial angle of the optical axis through mutual sighting of multiple theodolites. However, this method requires multiple theodolites to cooperate, and the measurement accuracy is difficult to guarantee. The second method is to install the load on the turntable to calibrate the spatial angle of the optical axis through a high-precision turntable. However, the measurement accuracy and range of this method are limited by the measurement turntable accuracy and size. SUMMARY

[0004] The purpose of the present application is to provide a high-precision pointing assembly method for multi-optical-axis assembly to solve the problem that high-precision pointing of multi-optical-axis assembly cannot be achieved in the current technology.

[0005] To achieve the above purpose, the present application provides a high-precision pointing assembly method for multi-optical-axis assembly. The multi-optical-axis assembly includes multiple optical assemblies installed on an optical base plate. The multiple optical assemblies include a reference mirror assembly. The optical axes of each optical assembly are parallel to each other. The assembly method includes the following steps:

[0006] S1, design and process the optical base plate;

[0007] S2, drill pin holes for positioning on the optical base plate, and determine the reference axis using the pin holes and the optical base plate;

[0008] S3, adjust the lens of the optical assembly;

[0009] S4, install the reference mirror assembly on the optical base plate, and adjust the installation angle and attitude of the reference mirror assembly so that the front surface normal of the reference mirror assembly is parallel to the reference axis;

[0010] S5, transferring the reference axes through the reference mirror assembly;

[0011] S6, installing each optical assembly and adjusting the attitude of each optical assembly based on the transferred reference axes;

[0012] S7, installing the assembled multi-optical-axis assembly to the whole-satellite installation surface through the pin holes, and obtaining the pointing directions of the optical axes of each optical assembly through coordinate conversion.

[0013] Preferably, the step S2 further comprises the following steps:

[0014] S21, drilling a pin hole for positioning at each of the four corners of the optical base plate, wherein the connecting lines of the adjacent two pin holes are parallel to each other;

[0015] S22, determining two reference axes parallel to each other by intersecting the virtual plane where the pin holes and the corresponding pins are located with the plane where the optical base plate is located.

[0016] Preferably, the plurality of optical assemblies further comprises four fine-beam displacement measurement assemblies, two laser interference length measurement assemblies, and two autocollimation angle measurement assemblies.

[0017] Preferably, the step S3 further comprises the following steps:

[0018] S31, adjusting the emission collimating lens of each fine-beam displacement measurement assembly;

[0019] S32, adjusting the collimating lens of each laser interference length measurement assembly;

[0020] S33, adjusting each autocollimation angle measurement assembly;

[0021] The steps S31, S32, and S33 have no sequence.

[0022] Preferably, the step S31 further comprises the following steps:

[0023] S311, installing the fine-beam displacement measurement assembly on a three-dimensional adjustment frame, and placing a beam quality analyzer on an optical platform at a distance from the emission collimating lens of the fine-beam displacement measurement assembly;

[0024] S312, taking the front end surface structure of the emission collimating lens of the fine-beam displacement measurement assembly as a reference surface, adjusting the three-dimensional adjustment frame, so that the optical axis of the emission collimating lens coincides with the optical axis of the beam quality analyzer;

[0025] S313, adjusting the focal length and the optical fiber optical axis of the transmitting collimating lens by adjusting the optical fiber position of the transmitting collimating lens, and reading the divergence angle and the imaging spot size of the transmitting collimating lens of the fine light beam displacement measuring assembly on the beam quality analyzer, so that the imaging spot is minimum;

[0026] S314, adjusting each fine light beam displacement measuring assembly in sequence.

[0027] Preferably, the step S32 further comprises the following steps:

[0028] S321, installing the laser interference length measuring assembly on the three-dimensional adjusting frame, and placing the collimator testing device opposite the collimating lens of the laser interference length measuring assembly;

[0029] S322, taking the front end surface structure of the collimating lens as the reference surface, adjusting the three-dimensional adjusting frame, so that the optical axis of the collimating lens of the laser interference length measuring assembly coincides with the optical axis of the collimator testing device;

[0030] S323, adjusting the focal length and the optical fiber optical axis of the collimating lens of the laser interference length measuring assembly by adjusting the optical fiber position of the collimating lens, and reading the divergence angle and the imaging spot size of the collimating lens of the laser interference length measuring assembly on the CCD device of the collimator testing device, so that the imaging spot is minimum;

[0031] S324, adjusting the collimating lens of each laser interference length measuring assembly in sequence.

[0032] Preferably, the step S33 further comprises the following steps:

[0033] S331, placing the CCD at the parallel position of the collimating lens of the autocollimation goniometer assembly, placing a plane mirror at the front end of the collimating lens of the autocollimation goniometer assembly, and adjusting the angle of the mirror, so that the light beam emitted by the collimating lens of the autocollimation goniometer assembly is reflected by the plane mirror and then imaged on the image plane of the CCD;

[0034] S332, adjusting the image plane position of the CCD forward and backward, so that the imaging spot on the image plane of the CCD is clearest;

[0035] S333, adjusting the optical fiber position of the collimating lens of the autocollimation goniometer assembly, so that the imaging spot on the image plane of the CCD is minimum;

[0036] S334, adjusting the collimating lens of each autocollimation goniometer assembly in sequence.

[0037] Preferably, the step S4 further comprises the following steps:

[0038] S41, install the reference mirror assembly on the optical base plate, so that the normal of the front surface of the reference mirror assembly is parallel to the virtual surface of the pin and the optical base surface; measure the deviation of the normal of the front surface of the reference mirror assembly from the virtual surface of the pin and the optical base surface respectively by using a three-coordinate measuring machine, and adjust the installation angle of the reference mirror assembly to control the two deviations within a specified range;

[0039] S42, adjust the posture of the reference mirror assembly by using the first autocollimator and the second autocollimator, so that the normal of the front surface of the reference mirror assembly is parallel to the reference axis.

[0040] Preferably, the step S42 further comprises the following steps:

[0041] S421, after adjusting the positions of the first autocollimator and the second autocollimator so that the optical axes thereof are coincided with the normals of the two surfaces of the high-precision reference mirror assembly respectively, fix the first autocollimator and the second autocollimator;

[0042] S422, adjust the posture of the reference mirror assembly so that the deviations of the normal of the front surface of the reference mirror assembly from the virtual surface of the pin and the optical base surface measured by the first autocollimator and the second autocollimator are consistent with the measured deviations by the three-coordinate measuring machine in the step S41, then fix the reference mirror assembly, and re-measure the two deviations by using the three-coordinate measuring machine to ensure that the deviation between the measurement results of the three-coordinate measuring machine and the measurement results of the first autocollimator and the second autocollimator is less than a specified value.

[0043] Preferably, the step S5 further comprises the following steps:

[0044] S51, place two small-aperture plane mirrors between each autocollimator and the reference mirror assembly respectively, and adjust the postures of the two small-aperture plane mirrors respectively so that the readings of each autocollimator are all 0, to complete the first reference axis transfer;

[0045] S52, adjust the positions and postures of the two autocollimators so that they are not blocked by the reference mirror assembly, and fix the two autocollimators when the measured readings of the corresponding small-aperture plane mirrors are 0;

[0046] S53, remove the two small-aperture plane mirrors, place a large-aperture plane mirror on the other side of the optical base plate, adjust the posture of the large-aperture plane mirror so that the readings of the two autocollimators are all 0, and remove the two autocollimators, at this time, the second reference axis transfer is completed, and the normal of the large-aperture plane mirror is parallel to the reference axis.

[0047] In the present application, there is no relative motion between the components of the photoelectric system, and the multi-optical axis pointing error is only caused by mechanical processing and optical axis debugging, so the pointing accuracy of the multi-optical axis of the system can be improved by effectively designing the mechanical reference and reasonably transferring the reference and the optical axis pointing, and the installation is simple and convenient, and the function of repeated disassembly and assembly can be realized under the premise of ensuring the pointing accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 Fig. 1 is a schematic diagram of a multi-optical axis assembly of the present application;

[0049] Figure 2 Fig. 2 is a schematic diagram of the optical axis of the multi-optical axis assembly of the present application;

[0050] Figure 3 Fig. 3 is a schematic diagram of the pin hole and the optical bottom plate of the present application;

[0051] Figure 4 Fig. 4 is a schematic diagram of the position of the reference axis transferred by the autocollimator in the present application;

[0052] Figure 5 Fig. 5 is a schematic diagram of the position of the reference axis transferred by the plane mirror in the present application;

[0053] Figure 6 Fig. 6 is a flow chart of the assembly method of the high-precision pointing of the multi-optical axis assembly of the present application. DETAILED DESCRIPTION

[0054] The technical solutions, structural features, purposes achieved and effects of the embodiments of the present application will be described in detail below. Figures 1-6 The technical solutions, structural features, purposes achieved and effects of the embodiments of the present application will be described in detail below.

[0055] It should be noted that the drawings are greatly simplified and use non-precise proportions, only for the purpose of facilitating and clarifying the purpose of assisting the description of the embodiments of the present application, and are not used to limit the scope of the present application, so they do not have technical significance, any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0056] It is to be noted that the relative terms such as first and second and the like in the present application are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between such entities or operations. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or apparatus that comprises a list of elements does not include only those elements that are expressly listed, but also other elements that are not expressly listed or are inherent to such process, method, article or apparatus.

[0057] The laser baseline measurement device is a multi-optical-axis assembly, comprising a plurality of optical components, such as Figure 1 and Figure 2 As shown in the figure, the plurality of optical components includes 4 fine-beam displacement measurement components 1, 2 autocollimation angle measurement components 2, 2 laser interference length measurement components 3 and 1 high-precision reference mirror component 4; the plurality of optical components are arranged and installed on the installation plane of the optical base plate 5, wherein the optical axes 11 of the fine-beam displacement measurement components 1, the optical axes 21 of the autocollimation angle measurement components 2 and the optical axes 31 of the laser interference length measurement components 3 are parallel to each other and parallel to the normal 7' of the front surface of the high-precision reference mirror component 4; the high-precision reference mirror component 4 is installed at the center of the side surface of the optical base plate 5; the fine-beam displacement measurement components 1 are installed at the four corners of the optical base plate 5, and the lenses of each fine-beam displacement measurement component 1 are outwardly directed ("outwardly" means that the lens is directed to the four corners of the optical base plate 5); the four fine-beam displacement measurement components 1 form two parallel optical axis straight lines, and the two parallel optical axis straight lines are parallel to the normal 7' of the front surface of the high-precision reference mirror component 4; the two autocollimation angle measurement components 2 are installed inwardly of the fine-beam displacement measurement components 1, and the two optical axes 21 thereof are located inwardly of and parallel to the two straight lines of the optical axes 11 of the four fine-beam displacement measurement components 1; the two laser interference length measurement components 3 are outwardly installed between the two autocollimation angle measurement components 2, and the optical axes 31 of the two laser interference length measurement components 3 are located on a straight line, which is also parallel to the optical axes 11 of the fine-beam displacement measurement components 1.

[0058] When using the above-mentioned multi-optical-axis laser baseline measurement device, it is very important to ensure the pointing accuracy of each optical component, and therefore the embodiment discloses an assembly method for realizing high-precision pointing of the multi-optical-axis assembly, as shown in the figure, comprising the following steps: Figure 6

[0059] S1, design and process a high-precision optical base plate 5;

[0060] ​Aluminum-based silicon carbide was selected as the material for the optical base plate 5. A rectangular optical base plate 5 with a rectangular plane was initially machined. After the machining was completed, the mounting plane of the optical base plate 5 was ground to make the flatness of the mounting plane reach 0.002-0.003mm.

[0061] S2. Determine the reference axis;

[0062] S21. Drill a positioning pin hole 6 at each of the four corners of the polished optical base plate 5. After assembling the multi-axis optical component of this embodiment, install the multi-axis optical component on the satellite mounting surface through the pin hole 6 and the corresponding pin. Use a high-precision three-coordinate optical instrument to test the position of the pin according to the installation requirements, thereby determining the position of the pin hole 6 on the optical base plate 5 and drilling the hole, wherein the position tolerance of the pin hole 6 is controlled within ±0.01mm.

[0063] Meanwhile, mounting holes for installing and fixing various optical components are drilled on the optical base plate 5.

[0064] S22. Determine the reference axis by intersecting the virtual surface of the pin and the optical bottom surface;

[0065] By testing the positions of the pin and pin hole 6, the position of the virtual surface containing the pin and pin hole 6 (hereinafter referred to as the pin virtual surface) is calculated; for example... Figure 3 As shown, the intersection of the virtual surface of the pin and the surface where the optical base plate 5 is located (i.e., the optical bottom surface) can determine two parallel reference axes 7. The reference axis 7 is the optical axis pointing direction of the multi-optical axis assembly system, that is, the direction of the line connecting the two pin holes 6 is the optical axis pointing direction.

[0066] The optical base plate 5 is rectangular. Generally, the four pin holes 6 also form a rectangle and are parallel to the rectangle of the optical base plate 5. Generally, considering the size of each optical component and the required installation position, the reference axis 7 is parallel to the short side of the rectangle, that is, the direction of the line connecting two adjacent pin holes 6 with a shorter distance is the optical axis direction.

[0067] In other embodiments, the lines connecting two adjacent pin holes 6 are parallel to each other.

[0068] In other embodiments, the direction of the line connecting two adjacent pin holes that are relatively far apart can be used as the reference axis (optical axis) direction.

[0069] S3. Adjusting the lenses of each optical component: Before installing the fine beam displacement measuring component 1, the laser interferometric length measuring component 3, and the autocollimation angle measuring component 2 on the optical base plate 5, their lenses need to be adjusted, specifically including the following steps:

[0070] S31, calibrate the emission collimating lens of each fine beam displacement measurement component 1;

[0071] S311, install the fine beam displacement measurement component 1 on a three-dimensional adjustment frame, and place the beam quality analyzer on an optical platform 20 meters away from the emission collimating lens of the fine beam displacement measurement component 1;

[0072] S312, take the front end surface structure of the lens as a reference surface, and adjust the three-dimensional adjustment frame so that the optical axis of the emission collimating lens coincides with the optical axis of the beam quality analyzer;

[0073] In other embodiments, a charge-coupled device (CCD) can also be used instead of the beam quality analyzer, which plays the same role.

[0074] S313, adjust the focal length and the optical fiber optical axis of the emission collimating lens by adjusting the position of the optical fiber of the emission collimating lens, and read the divergence angle and the imaging spot size of the emission collimating lens of the fine beam displacement measurement component 1 on the beam quality analyzer, and when the imaging spot reaches the minimum, the calibration of the fine beam displacement measurement component 1 is completed;

[0075] S314, calibrate each fine beam displacement measurement component 1 in turn.

[0076] S32, calibrate the collimating lens of each laser interference length measurement component 3;

[0077] S321, install the laser interference length measurement component 3 on a three-dimensional adjustment frame, and place the collimator test device opposite the collimating lens of the laser interference length measurement component 3;

[0078] S322, take the front end surface structure of the collimating lens as a reference surface, and adjust the three-dimensional adjustment frame so that the optical axis of the collimating lens of the laser interference length measurement component 3 coincides with the optical axis of the collimator test device;

[0079] S323, adjust the focal length and the optical fiber optical axis of the collimating lens by adjusting the position of the optical fiber of the collimating lens of the laser interference length measurement component 3, and read the divergence angle and the imaging spot size of the collimating lens of the laser interference length measurement component 3 on the CCD device of the collimator test device, and when the imaging spot reaches the minimum, the calibration of the collimating lens of the laser interference length measurement component 3 is completed;

[0080] S324, calibrate the collimating lens of each laser interference length measurement component 3 in turn.

[0081] S33, calibrate each self-collimating angle measurement component 2;

[0082] S331. Place the CCD in a position parallel to the lens of the autocollimating angle measuring component 2; place a plane mirror in front of the lens of the autocollimating angle measuring component 2, and adjust the angle of the mirror so that the light beam emitted by the lens of the autocollimating angle measuring component 2 is reflected by the plane mirror and imaged on the image plane of the CCD.

[0083] S332. By adjusting the position of the CCD image plane back and forth, the imaging spot on the CCD image plane is made clearest.

[0084] S333. Adjust the fiber position of the autocollimation angle measuring component 2 lens. When the imaging spot on the CCD image plane is the smallest, the adjustment of the autocollimation angle measuring component 2 lens is completed.

[0085] S334. Adjust each autocollimation and angle measurement component 2 lens in sequence.

[0086] The lens adjustment of each optical component is completed through the above steps. The order of steps S31, S32, and S33 is not important.

[0087] S4. Install the high-precision reference mirror assembly 4 on the optical base plate 5, and adjust its installation angle and attitude using a coordinate measuring machine and an autocollimator.

[0088] S41. Install the high-precision reference mirror assembly 4 onto the optical base plate 5, making the front surface normal 7′ of the high-precision reference mirror assembly 4 parallel to the virtual surface of the pin and the optical base plate: Use a coordinate measuring machine to measure the deviations of the front surface normal 7′ of the high-precision reference mirror assembly 4 from the virtual surface of the pin and from the optical base plate, and adjust the installation angle of the high-precision reference mirror assembly 4 to control these two deviations within 0.1°.

[0089] S42. Adjust the attitude of the high-precision reference mirror assembly 4 using the first autocollimator 81 and the second autocollimator 82.

[0090] S421, such as Figure 4 As shown, the positions of the first autocollimator 81 and the second autocollimator 82 are adjusted so that their optical axes coincide with the normals of the two surfaces of the high-precision reference mirror assembly 4, and then the first autocollimator 81 and the second autocollimator 82 are fixed. The optical axis of the first autocollimator 81 coincides with the normal of the side surface of the high-precision reference mirror assembly 4, and the optical axis of the second autocollimator 82 coincides with the normal 7′ of the front surface of the high-precision reference mirror assembly 4.

[0091] S422, adjust the posture of the high-precision reference mirror assembly 4, so that the deviations of the front surface normal 7' of the high-precision reference mirror assembly 4 measured by the first autocollimator 81 and the second autocollimator 82 from the pin virtual plane and from the optical bottom surface are consistent with the measurement deviations of the three-coordinate measuring machine in S41, then fix the high-precision reference mirror assembly 4, and re-measure the above two deviations by using the three-coordinate measuring machine, to ensure that the deviation between the measurement results of the three-coordinate measuring machine and the measurement results of the first autocollimator 82 and the second autocollimator 83 is less than 1", if the deviation is greater than 1", repeat step S4 until the deviation is less than 1".

[0092] S5, transfer the reference axis through the high-precision reference mirror assembly 4;

[0093] After S4, the front surface normal 7' of the high-precision reference mirror assembly 4 is parallel to the reference axis 7, and the transfer of the front surface normal 7' of the high-precision reference mirror assembly 4 is the transfer of the reference axis, which specifically includes the following steps:

[0094] S51, place two small-aperture plane mirrors 91 between each autocollimator and the high-precision reference mirror assembly 4 respectively, and adjust the posture of each small-aperture plane mirror 91 so that the reading of each autocollimator is 0, to complete the first reference axis transfer, and the accuracy of adjusting the autocollimator reading by using the mirror is 0.25", that is, the accuracy of the first reference axis transfer is 0.25".

[0095] The aperture of the small-aperture plane mirror 91 is Φ100mm.

[0096] S52, adjust the positions and postures of the two autocollimators so that they are not blocked by the reference mirror assembly 4, and fix the two autocollimators when the measurement reading of the corresponding small-aperture plane mirror 91 is 0.

[0097] S53, remove the two small-aperture plane mirrors 91, and place a large-aperture plane mirror 92 on the other side (the side opposite to the autocollimator) of the optical bottom plate 5, as shown in FIG. 6, adjust the posture of the large-aperture plane mirror 92 so that the readings of the two autocollimators are both 0, remove the two autocollimators, and at this time, the second reference axis transfer is completed, and the accuracy is also 0.25". Figure 5 After two reference axis transfers, the normal of the large-aperture plane mirror 92 is parallel to the reference axis 7, and the cumulative transfer accuracy reaches 0.5".

[0098] The aperture of the large-aperture plane mirror 92 is Φ400mm.

[0099] S6, install each optical assembly, and adjust the posture of each optical assembly based on the transferred reference axis;

[0100]

[0101] ​Each optical component (4 fine-beam displacement measurement components 1, 2 autocollimation angle measurement components 2, 2 laser interference length measurement components 3) is installed on the optical base plate through the mounting holes on the optical base plate 5; the optical axes of each optical component are adjusted with high precision based on the normal line of the large-aperture plane mirror 92, so that the optical axes of each optical component are parallel to the normal line of the large-aperture plane mirror 92, and thus parallel to the front surface normal line 7' of the reference mirror component 4, i.e. parallel to the reference axis, and the installation and adjustment are completed, and the large-aperture plane mirror 92 is removed.

[0102] S7, after the whole machine installation and adjustment is completed, the assembled multi-optical-axis component is installed to the whole star installation surface and is installed and fixed through the four pin holes 6; the directions of the optical axes of each optical component are obtained through coordinate conversion, and there is no need to separately calibrate the optical axes of each component, and meanwhile, the optical axes can be quickly and accurately repeatedly disassembled and assembled under the premise of ensuring the optical axis precision.

[0103] Although the content of the present application has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present application. After the above content is read by the person skilled in the art, various modifications and substitutions of the present application will be obvious. Therefore, the protection scope of the present application should be defined by the appended claims.

Claims

1. An assembly method for achieving high-precision pointing of a multi-optical-axis assembly, the multi-optical-axis assembly comprising multiple optical components mounted on an optical substrate, the multiple optical components including a reference mirror assembly, the optical axes of each optical component being parallel to each other, characterized in that, Includes the following steps: S1. Design and fabrication of optical base plates; S2. Drill pin holes on the optical base plate for positioning, and use the pin holes and the optical base plate to determine the reference axis; S3. Adjust the lens's optical components; S4. Mount the reference mirror assembly on the optical base plate and adjust the mounting angle and orientation of the reference mirror assembly so that the normal of the front surface of the reference mirror assembly is parallel to the reference axis. S5. Transfer the reference axis through the reference mirror assembly; S6. Install each optical component and adjust the attitude of each optical component based on the transferred reference axis; S7. Install the assembled multi-optical axis assembly onto the satellite mounting surface through the pin holes, and calculate the direction of the optical axis of each optical component through coordinate conversion.

2. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 1, characterized in that, Step S2 further includes the following steps: S21. Drill a positioning pin hole at each of the four corners of the optical base plate, wherein the lines connecting two adjacent pin holes are parallel to each other. S22. Determine two parallel reference axes by intersecting the virtual surface where the pin hole and the corresponding pin are located with the surface where the optical base plate is located.

3. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 1, characterized in that, The multiple optical components also include four narrow beam displacement measurement components, two laser interferometric length measurement components, and two autocollimation angle measurement components.

4. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 3, characterized in that, Step S3 further includes the following steps: S31. Adjust the emission collimating lens of each fine beam displacement measurement component; S32. Adjust the collimating lenses of each laser interferometric length measuring component; S33. Debug each autocollimation and angle measurement component; There is no specific order among the steps S31, S32, and S33 mentioned above.

5. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 4, characterized in that, Step S31 further includes the following steps: S311. Install the fine beam displacement measuring component on the three-dimensional adjustment frame, and place the beam quality analyzer on an optical platform at a distance from the transmitting collimating lens of the fine beam displacement measuring component. S312. Using the front surface structure of the transmitting collimating lens of the fine beam displacement measurement component as a reference plane, adjust the three-dimensional adjustment frame so that the optical axis of the transmitting collimating lens coincides with the optical axis of the beam quality analyzer. S313. By adjusting the position of the optical fiber of the transmitting collimating lens, the focal length and optical axis of the transmitting collimating lens are adjusted, and the divergence angle and imaging spot size of the transmitting collimating lens of the fine beam displacement measurement component are read on the beam quality analyzer to minimize the imaging spot. S314. Each fine beam displacement measurement component is adjusted sequentially.

6. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 4, characterized in that, Step S32 further includes the following steps: S321. Install the laser interferometric length measuring component on the three-dimensional adjustment frame, and place the collimator testing equipment opposite the collimating lens of the laser interferometric length measuring component; S322. Using the front surface structure of the collimating lens as a reference plane, adjust the three-dimensional adjustment frame so that the optical axis of the collimating lens of the laser interferometric length measuring component coincides with the optical axis of the collimating tube testing device. S323. By adjusting the position of the optical fiber of the collimating lens of the laser interferometric length measuring component, the focal length of the collimating lens and the optical axis of the optical fiber are adjusted. The divergence angle and the size of the imaging spot of the collimating lens of the laser interferometric length measuring component are read on the CCD device of the collimating tube test equipment to minimize the imaging spot. S324. Adjust the collimating lenses of each laser interferometric length measuring component in turn.

7. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 4, characterized in that, Step S33 further includes the following steps: S331. Place the CCD in a position parallel to the lens of the autocollimating angle measuring component; place a plane mirror in front of the lens of the autocollimating angle measuring component, and adjust the angle of the mirror so that the light beam emitted by the lens of the autocollimating angle measuring component is reflected by the plane mirror and imaged on the image plane of the CCD. S332. By adjusting the position of the CCD image plane back and forth, the imaging spot on the CCD image plane is made clearest. S333. Adjust the fiber position of the autocollimation angle measuring component lens to minimize the imaging spot on the CCD image plane. S334. Adjust each autocollimation and angle measurement component lens in turn.

8. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 2, characterized in that, Step S4 further includes the following steps: S41. Install the reference mirror assembly onto the optical base plate, making the normal of the front surface of the reference mirror assembly parallel to the virtual surface of the pin and the optical base plate: Use a coordinate measuring machine to measure the deviation between the normal of the front surface of the reference mirror assembly and the virtual surface of the pin and the optical base plate, respectively, and adjust the installation angle of the reference mirror assembly to control these two deviations within the specified range. S42. Using the first autocollimator and the second autocollimator, adjust the attitude of the reference mirror assembly so that the normal of the front surface of the reference mirror assembly is parallel to the reference axis.

9. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 8, characterized in that, Step S42 further includes the following steps: S421. Adjust the positions of the first autocollimator and the second autocollimator so that their optical axes coincide with the normals of the two surfaces of the high-precision reference mirror assembly, and then fix the first autocollimator and the second autocollimator. S422. Adjust the attitude of the reference mirror assembly so that the deviations of the front surface normal of the reference mirror assembly measured by the first autocollimator and the second autocollimator from the virtual surface of the pin and the optical bottom surface are consistent with the measurement deviations of the coordinate measuring machine in S41. Then fix the reference mirror assembly and use the coordinate measuring machine to remeasure the above two deviations to ensure that the deviation between the measurement results of the coordinate measuring machine and the measurement results of the first autocollimator and the second autocollimator is less than the specified value.

10. The assembly method for achieving high-precision pointing of multi-optical axis components as described in claim 4, characterized in that, Step S5 further includes the following steps: S51. Place two small-aperture plane mirrors between each autocollimator and reference mirror assembly, and adjust the attitude of the two small-aperture plane mirrors so that the reading of each autocollimator is 0, thus completing the first reference axis transfer. S52. Adjust the position and attitude of the two autocollimators so that they are not obstructed by the reference mirror assembly, and fix the two autocollimators when the measurement reading of the corresponding small-aperture plane mirror is 0. S53. Remove the two small-aperture plane mirrors and place a large-aperture plane mirror on the other side of the optical base plate. Adjust the attitude of the large-aperture plane mirror so that the readings of the two autocollimators are both 0. Remove the two autocollimators. At this time, the second reference axis transfer is completed, and the normal of the large-aperture plane mirror is parallel to the reference axis.

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