Quick alignment and self-calibration method for parallelism of laser transceiver common optical path system based on corner reflector / corn prism

Abstract

The application relates to a kind of laser transceiver common optical path system parallelism fast installation and adjustment and self calibration method based on corner reflector / corner cube prism, relate to optical machine structure and installation and adjustment technical field, solve the technical problem that the traditional method in prior art relies on large-scale detection equipment in laboratory, cannot realize laser transceiver common optical path system itself online calibration.The application comprises the following steps: reference transmitting light path passes through shaft;Form self-reflection loop based on corner reflector / corner cube prism, adjust to make that convergent light spot is minimum;Angle adjustment is carried out based on the adjusting structure in each receiving sub light path;Form self-reflection loop, adjust to make that convergent light spot is minimum;Angle adjustment is carried out based on the adjusting structure in each transmitting sub light path, so that the imaging centroid position in each receiving sub light path is as same as possible.The method of the application greatly reduces the installation and adjustment complexity by using the principle of returning the original path of corner reflector / corner cube prism without precise pose adjustment.

Description

Technical Field

[0001] This invention relates to the field of optomechanical structure and assembly technology, and in particular to a rapid assembly and self-calibration method for the parallelism of a laser transceiver common optical path system based on corner reflectors / corner cone prisms. Background Technology

[0002] To achieve integration, unification, and miniaturization of various detection or communication systems, a single high-quality optical antenna is often used, with multiple laser sub-paths having different functions achieved through wavelength or energy division. This type of laser transceiver co-path system has gradually replaced traditional single-function laser systems and has become a common system architecture in fields such as laser communication and laser ranging.

[0003] Laser transceiver systems require excellent parallelism between all optical paths, especially the consistency between the core transceiver paths, which is crucial for system functionality and performance. A common assembly and adjustment method involves placing the entire system on a multi-axis calibrator, typically based on a long-focal-length collimator and beam quality analyzer, as exemplified by Chinese patent documents CN201721470630.0 and CN201210080090.0. This traditional method relies on large-scale laboratory testing equipment, requiring precise on-axis field-of-view alignment between the laser transceiver system and the traditional multi-axis calibrator. It also places high demands on the environmental and tooling stability during the assembly and adjustment process. Furthermore, traditional multi-axis calibrators cannot perform online calibration of the laser transceiver system itself, making them unsuitable for parallelism checks and maintenance of systems used outdoors. Summary of the Invention

[0004] This invention aims to solve the technical problem that traditional methods in the prior art rely on large-scale testing equipment in the laboratory, which cannot achieve online calibration of the laser transceiver common optical path system. It provides a method for rapid assembly and self-calibration of the parallelism of the laser transceiver common optical path system based on corner reflectors / corner cone prisms.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A rapid assembly and self-calibration method for the parallelism of a laser transceiver co-path system based on corner reflectors / corner cone prisms includes the following steps:

[0007] Step 1: Connect one of the optical fiber paths that has laser emission or reception through the axis, and use the optical path after the axis connection as the reference emission optical path; make preliminary connections to the remaining non-common optical path sub-optical paths;

[0008] Step 2: Place the corner reflector or corner cube prism at the first beam splitter of the system. The reference emission optical path sequentially emits lasers with specific wavelengths that can be responded to by each receiving sub-optical path. A self-reflection circuit is formed based on the corner reflector or corner cube prism. At this time, a converging spot is formed on the target surface of each receiving sub-optical path. Adjust the distance between the fiber of the reference emission optical path and the collimating lens, and adjust the relative distance between the target surface of each receiving sub-optical path and the lens to minimize the converging spot.

[0009] Step 3: Adjust the angle based on the adjustment structure in each receiving sub-optical path so that after the laser is reflected by the corner reflector or corner prism, it is imaged as close as possible to the center of the target surface of each receiving sub-optical path, and the difference in the centroid of the imaging of each receiving sub-optical path is less than the parallelism index of the system.

[0010] Step 4: Use other transmitting sub-optical paths to emit lasers with specific wavelengths that can be responded to by each receiving sub-optical path. Also based on corner reflectors or corner cone prisms, a self-reflection loop is formed inside the system, forming a converging spot on the target surface of each receiving sub-optical path. Adjust the relative distance between the transmitting fiber and the collimating lens of each transmitting sub-optical path to minimize the converging spot.

[0011] Step 5: Adjust the angle based on the adjustment structure in each transmitting sub-optical path so that after the laser is reflected by the corner reflector or corner prism, it is as close as possible to the position of the imaging centroid in each receiving sub-optical path in Step 3, and the difference is less than the parallelism index of the system.

[0012] In the above technical solution, taking the reference receiving optical path as a comparison, the parallelism error of each receiving sub-optical path when adjusting the angle based on the adjustment structure within each receiving sub-optical path in step 3 is:

[0013] EX Ji =X Ji *S i / P, EY Ji =Y Ji *S i / P;

[0014] Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Ji and Y Ji EX represents the X-axis and Y-axis coordinates of the centroid position of the i-th receiving sub-optical path. Ji and EY Ji These are the parallelism errors of the X and Y axes of the i-th receiving sub-optical path, respectively.

[0015] In the above technical solution, the parallelism error of each emitter optical path during angle adjustment based on the adjustment structure within each emitter optical path in step 5 is:

[0016] EX Fi =X Fi *S1 / P, EY Fi =Y Fi *S1 / P;

[0017] Where S1 represents the pixel resolution of the camera in the first receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y Fi EX represents the X-axis and Y-axis coordinates of the centroid position of the i-th transmitting sub-optical path. Fi and EY Fi These are the X-axis and Y-axis coordinates of the parallelism error of the i-th emitter sub-path, respectively.

[0018] In the above technical solution, after step 5, there is an additional step: calculating the parallelism between any two optical paths using the coordinate difference; specifically:

[0019] The parallelism between the i-th and j-th optical transmission paths is:

[0020] EX Fi-j =(X Fi -X Fj )*S i / P, EY Fi-j =(Y Fi -Y Fj )*S i / P;

[0021] Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y Fi The X and Y coordinates of the centroid position of the i-th transmitting sub-optical path are respectively given by X and Y. Fj and Y Fj EX represents the X-axis and Y-axis coordinates of the centroid position of the j-th emitting sub-optical path. Fi-j and EY Fi-j These are the X-axis and Y-axis coordinates of the parallelism error between the i-th and j-th optical paths, respectively.

[0022] The present invention has the following beneficial effects:

[0023] This invention presents a rapid parallelism assembly and self-calibration method for a laser transceiver common optical path system based on corner reflectors / corner pyramid prisms. Utilizing the original path return principle of corner reflectors / corner pyramid prisms, this method eliminates the need for precise pose adjustments, significantly reducing assembly complexity. This method does not rely on external testing equipment; the parallelism detection optical path can be constructed using only the corner reflectors / corner pyramid prisms and the system's own optical path, offering simplicity and low cost. Furthermore, the corner reflectors can be integrated into the system itself, enabling self-calibration capabilities outdoors. Especially when parallelism changes due to outdoor environmental factors, in-situ adjustments can be performed using the self-calibration method, eliminating the need for factory return. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a flowchart illustrating the rapid assembly and self-calibration method for the parallelism of a laser transceiver common optical path system based on corner reflectors / corner cone prisms according to the present invention.

[0026] Figure 2 This is a schematic diagram of the optical path structure of a typical ground relay optical path system for satellite-to-ground laser communication.

[0027] The reference numerals in the figure are:

[0028] 1-First beam splitter; 2-Corner reflector; 3-Acquiring optical path imaging lens; 4-Acquiring detector; 5-Fine tracking detector; 6-Fine tracking imaging lens; 7-Fine tracking sub-optical path reflector; 8-Third beam splitter; 9-Signal coupling fiber coupling lens; 10-Signal coupling fiber; 11-Second beam splitter; 12-Fast-reflecting mirror; 13-Beacon transmitting fiber; 14-Beacon transmitting collimating lens; 15-Beacon transmitting sub-optical path reflector; 16-Optical antenna. Detailed Implementation

[0029] The inventive concept of this invention is as follows:

[0030] The present invention provides a rapid assembly and self-calibration method for the parallelism of a laser transceiver common optical path system based on corner reflectors / corner cone prisms. This method can perform assembly, adjustment and self-calibration without relying on external testing instruments, using the system's own functional optical path as the testing optical path.

[0031] The core of the present invention, which is a rapid assembly and self-calibration method for parallelism of a laser transceiver common optical path system based on corner reflectors / corner pyramid prisms, lies in the principle of original path return based on corner reflectors / corner pyramid prisms. This allows the system's own optical path to be used as a calibration and testing optical path, which is equivalent to completing the system's own assembly and calibration while building the testing optical path.

[0032] The corner reflector / corner cone prism has the characteristics of a reverse emitter, which makes the method of the present invention unnecessary for precise adjustment of the orientation and position of the corner reflector / corner cone prism, greatly simplifying the assembly and adjustment process.

[0033] like Figure 1 As shown, the steps of the rapid parallelism assembly and self-calibration method for a laser transceiver common optical path system based on corner reflectors / corner cone prisms of the present invention are as follows:

[0034] Step 1: Thread one of the optical fibers that emits or receives laser light through a coaxial cable. The resulting optical path serves as the reference common optical path, referred to as the reference emission optical path. Connect the remaining non-common optical path sections according to the optomechanical structure layout.

[0035] Step 2: Place the corner reflector or corner prism at the first beam splitter of the system. The reference emission optical path sequentially emits lasers with specific wavelengths that can be responded to by each receiving sub-optical path. A self-reflection circuit is formed based on the corner reflector or corner prism. At this time, a converging spot will be formed on the target surface of each receiving sub-optical path. Adjust the distance between the fiber of the reference emission optical path and the collimating lens, and adjust the relative distance between the target surface of each receiving sub-optical path and the lens to minimize the converging spot.

[0036] Step 3: Adjust the angle based on the adjustment structure within each receiving sub-optical path (non-common optical path section) to ensure that the laser, after self-reflection by the corner reflector or corner cube prism, is imaged as centrally as possible on the target surface of each receiving sub-optical path. The centroid difference between the imaging sub-optical paths should be less than the system's parallelism index. Given m receiving sub-optical paths, record their centroid positions as (X... J1 Y J1 ), (X J2 Y J2 )…(X Jm ,

[0037] Y Jm Then the parallelism adjustment between each receiving sub-optical path and the reference transmitting optical path is completed.

[0038] Step 4: Use other transmitting sub-optical paths to emit lasers with specific wavelengths that can be responded to by each receiving sub-optical path. Also based on corner reflectors or corner cone prisms, a self-reflection loop is formed inside the system, forming a converging spot on the target surface of each receiving sub-optical path. Adjust the relative distance between the transmitting fiber and the collimating lens of each transmitting sub-optical path to minimize the converging spot.

[0039] Step 5: Adjust the angle based on the adjustment structure within each emitting sub-optical path (non-common optical path section) so that after self-reflection by the corner reflector or corner cube prism, the laser's centroid position is as close as possible to the imaging centroid position within each receiving sub-optical path in Step 3, and the difference should be less than the system's parallelism index. Given n emitting sub-optical paths, record the centroid positions at this time as (X...F1 Y F1 ), (X F2 Y F2 )…(X Fn Y Fn Then the parallelism adjustment of each transmitting sub-optical path with the reference optical path and each receiving sub-optical path is completed.

[0040] In step 1, the corner reflector can be permanently placed in the system as part of the laser transceiver common optical path system itself.

[0041] The receiving sub-optical path represents an optical path with imaging capabilities, while the transmitting sub-optical path represents an optical path with laser emission or laser coupling capabilities.

[0042] The coordinates of the center of the detector target surface of each receiver sub-optical path are defined as (0, 0).

[0043] Select one reference receiving optical path, assuming the ideal imaging position of the reference transmitting optical path on the reference receiving optical path is (0, 0). Using the reference receiving optical path as a reference, the parallelism error of each receiving sub-path in step 3 can be calculated as follows:

[0044] EX Ji =X Ji *S i / P, EY Ji =Y Ji *S i / P.

[0045] Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Ji and Y Ji EX represents the X-axis and Y-axis coordinates of the centroid position of the i-th receiving sub-optical path. Ji and EY Ji These are the parallelism errors of the X and Y axes of the i-th receiving sub-optical path, respectively.

[0046] Assuming the ideal imaging position of the reference transmitting optical path on the reference receiving optical path is (0, 0), the parallelism error of each transmitting sub-path in step 5 can be calculated as follows:

[0047] EX Fi =X Fi *S1 / P, EY Fi =Y Fi *S1 / P.

[0048] Where S1 represents the pixel resolution of the camera in the first receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y FiEX represents the X-axis and Y-axis coordinates of the centroid position of the i-th transmitting sub-optical path. Fi and EY Fi These are the X-axis and Y-axis coordinates of the parallelism error of the i-th emitter sub-path, respectively.

[0049] Alternatively, the parallelism between any two optical paths can be calculated using the coordinate difference as described above. The parallelism between the i-th and j-th emission optical paths is:

[0050] EX Fi-j =(X Fi -X Fj )*S i / P, EY Fi-j =(Y Fi -Y Fj )*S i / P;

[0051] Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y Fi The X and Y coordinates of the centroid position of the i-th transmitting sub-optical path are respectively given by X and Y. Fj and Y Fj EX represents the X-axis and Y-axis coordinates of the centroid position of the j-th emitting sub-optical path. Fi-j and EY Fi-j These are the X-axis and Y-axis coordinates of the parallelism error between the i-th and j-th optical paths, respectively.

[0052] Taking the parallelism between the first and second emission optical paths as an example, then:

[0053] EX F1-2 =(X F1 -X F2 )*S1 / P,EY F1-2 =(Y F1 -Y F2 )*S1 / P;

[0054] Where S1 represents the pixel resolution of the camera in the first receiving sub-optical path, in urads; P is the magnification of the optical antenna; X F1 and Y F1 These are the X-axis and Y-axis coordinates of the centroid position of the first transmitting sub-optical path, respectively. F2 and Y F2 EX represents the X-axis and Y-axis coordinates of the centroid position of the second transmitting sub-optical path. F1-2 and EY F1-2 These are the X-axis and Y-axis coordinates of the parallelism error between the first and second optical paths, respectively.

[0055] The present invention will now be described in detail with reference to the accompanying drawings.

[0056] The following is in conjunction with the appendix Figure 2 The implementation of the technical solution of the present invention will be described in further detail to more clearly illustrate the characteristics of the method proposed in the present invention, but this should not be construed as limiting the scope of protection of the present invention. Any scheme or product in a multi-axis laser system that uses a corner reflector / corner cone prism to return to its original path and then forms a detection and self-calibration optical path with its own optical path falls within the scope of protection of the present invention.

[0057] A typical optical path structure for a ground relay optical path system for satellite-to-ground laser communication is as follows: Figure 2 As shown, its laser transceiver optical path system contains four optical paths, sharing a single optical antenna 16. Two of these are receiving optical paths: a capture detection optical path consisting of an imaging lens 3 and a capture detector 4; and a fine tracking detection optical path consisting of a fine tracking detector 5 and a fine tracking imaging lens 6. Two are transmitting optical paths: a signal coupling optical path consisting of a signal coupling fiber coupling lens 9 and a signal coupling fiber 10; and a signal transmitting optical path consisting of a beacon transmitting sub-optical path consisting of a reflector 15, a beacon transmitting collimating lens 14, and a beacon transmitting fiber 13. Both the capture detection optical path and the fine tracking detection optical path are capable of responding to a wavelength of 1550 nm. The pixel resolution of the capture detection optical path is 100 urad, the pixel resolution of the fine tracking detection optical path is 75 urad, and the magnification of the optical antenna 16 is 100.

[0058] The present invention provides a rapid assembly and self-calibration method for parallelism adjustment in a laser transceiver co-optical path system based on corner reflectors / corner cone prisms, comprising the following steps:

[0059] Step 1: Use the signal-coupled optical path as the reference emission optical path. That is, the reference emission optical path is composed of the first beam splitter 1, the second beam splitter 11, the fast reflector 12, the third beam splitter 8, the signal-coupled fiber coupling lens 9, and the signal-coupled fiber 10. The signal-coupled fiber 10 is connected to a 1550nm wavelength laser. Observe the coverage of the light spot on each optical element to ensure that it does not block the light. This completes the cross-axis connection of the reference emission optical path.

[0060] Step 2: Place the corner reflector at the first beam splitter 1, and connect a 1550nm wavelength laser to the signal coupling fiber 10. The laser beam is collimated into parallel light by the signal coupling fiber 10 and sequentially passes through the signal coupling fiber coupling lens 9, the third beam splitter 8, the fast-reflecting mirror 12, the second beam splitter 11, and the first beam splitter 1 to reach the corner reflector 2. Based on the principle of beam return from the corner reflector 2, the beam returning to the first beam splitter 1 follows the same path. A portion of the beam is reflected from the first beam splitter 1 and converges into a spot on the target surface of the capture detector 4 via the capturing optical path imaging lens 3. Adjust the relative distance between the capturing optical path imaging lens 3 and the capture detector 4 to minimize the spot diameter. Another portion of the beam, refracted by the first beam splitter 1, passes through the second beam splitter 11, the fast-reflecting mirror 12, the third beam splitter 8, the fine-tracking sub-optical path reflector 7, and the fine-tracking imaging lens 6, converging into a single spot on the target surface of the fine-tracking detector 5. Similarly, the relative distance between the fine-tracking imaging lens 6 and the fine-tracking detector 5 is adjusted to minimize the spot diameter. The relative distance between the signal coupling fiber coupling lens 9 and the signal coupling fiber 10 is also adjusted to minimize the spot diameter.

[0061] Step 3: Define the center position coordinates of the acquisition detector 4 and the fine tracking detector 5 as (0, 0). Adjust the attitude of the acquisition detector 4 relative to the acquisition optical path imaging lens 3 so that the light spot in the acquisition detector 4 is as close as possible to the center of the target surface, and record the centroid coordinates of the light spot at this time as (0, 1). Similarly, adjust the attitude of the fine tracking sub-optical path reflector 7 so that the light spot in the fine tracking detector 5 is as close as possible to the center of the target surface, and record the centroid coordinates of the light spot at this time as (1, 2).

[0062] but:

[0063] The parallelism between the precision tracking detection optical path and the coupling optical path is:

[0064] EX J1 =1*75 / 100=0.75urad, EY J1 =2*75 / 100=1.5urad.

[0065] The parallelism between the capture and detection optical path and the coupling optical path is:

[0066] EX J2 =0*100 / 100=0urad,EY J2 =1*100 / 100=1urad.

[0067] The parallelism error between the fine tracking probe optical path and the acquisition probe optical path is:

[0068] EX J1-2 =(0-1)*75 / 100=-0.75urad,EY J1-2=(1-2)*75 / 100=-0.75urad.

[0069] Step 4: Connect the beacon transmitting fiber 13 to the 1550nm wavelength laser. Similar to step 2, this will also enable the imaging of a light spot on the target surface of the capture detector 4 and the fine tracking detector 5. Adjust the relative distance between the beacon transmitting collimating lens 14 and the beacon transmitting fiber 13 to minimize the diameter of the light spot.

[0070] Step 5: Adjust the attitude of the beacon transmitter optical path reflector 15 so that the imaging spot inside the fine tracking detector 5 is as close as possible to (X). J2 Y J2 That is, (1, 2) in step 3, and record the actual centroid coordinates of the spot at this time as (2, -2).

[0071] but:

[0072] The parallelism between the signal transmitting sub-optical path and the coupling optical path is:

[0073] EX F1 =2*75 / 100=1.5urad, EY F1 =-2*75 / 100=-1.5urad;

[0074] The parallelism error between the signal transmitting sub-optical path and the fine tracking detection optical path is:

[0075] EX F1-1 =(1-2)*75 / 100=-0.75urad,EY F1-1 = (2-(-2))*75 / 100 = 3urad.

[0076] This invention presents a rapid parallelism assembly and self-calibration method for a laser transceiver common optical path system based on corner reflectors / corner pyramid prisms. Utilizing the original path return principle of corner reflectors / corner pyramid prisms, this method eliminates the need for precise pose adjustments, significantly reducing assembly complexity. This method does not rely on external testing equipment; the parallelism detection optical path can be constructed using only the corner reflectors / corner pyramid prisms and the system's own optical path, offering simplicity and low cost. Furthermore, the corner reflectors can be integrated into the system itself, enabling self-calibration capabilities outdoors. Especially when parallelism changes due to outdoor environmental factors, in-situ adjustments can be performed using the self-calibration method, eliminating the need for factory return.

[0077] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for rapid assembly, adjustment, and self-calibration of parallelism in a laser transceiver co-optical path system based on a corner reflector / corner cone prism, characterized in that, Includes the following steps: Step 1: Connect one of the optical fiber paths that has laser emission or reception through the axis, and use the optical path after the axis connection as the reference emission optical path; make preliminary connections to the remaining non-common optical path sub-optical paths; Step 2: Place the corner reflector or corner cube prism at the first beam splitter of the system. The reference emission optical path sequentially emits lasers with specific wavelengths that can be responded to by each receiving sub-optical path. A self-reflection circuit is formed based on the corner reflector or corner cube prism. At this time, a converging spot is formed on the target surface of each receiving sub-optical path. Adjust the distance between the fiber of the reference emission optical path and the collimating lens, and adjust the relative distance between the target surface of each receiving sub-optical path and the lens to minimize the converging spot. Step 3: Adjust the angle based on the adjustment structure in each receiving sub-optical path so that after the laser is reflected by the corner reflector or corner prism, it is imaged as close as possible to the center of the target surface of each receiving sub-optical path, and the difference in the centroid of the imaging of each receiving sub-optical path is less than the parallelism index of the system. Step 4: Use other transmitting sub-optical paths to emit lasers with specific wavelengths that can be responded to by each receiving sub-optical path. Also based on corner reflectors or corner cone prisms, a self-reflection loop is formed inside the system, forming a converging spot on the target surface of each receiving sub-optical path. Adjust the relative distance between the transmitting fiber and the collimating lens of each transmitting sub-optical path to minimize the converging spot. Step 5: Adjust the angle based on the adjustment structure in each transmitting sub-optical path so that after the laser is reflected by the corner reflector or corner prism, it is as close as possible to the position of the imaging centroid in each receiving sub-optical path in Step 3, and the difference is less than the parallelism index of the system.

2. The method for rapid parallelism adjustment and self-calibration of a laser transceiver common optical path system based on corner reflectors / corner cone prisms according to claim 1, characterized in that, Using the reference receiving optical path as a reference, the parallelism error of each receiving sub-optical path during angle adjustment based on the adjustment structure within each receiving sub-optical path in step 3 is as follows: EX Ji =X Ji *S i / P,EY Ji =Y Ji *S i / P; Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Ji and Y Ji EX represents the X-axis and Y-axis coordinates of the centroid position of the i-th receiving sub-optical path. Ji and EY Ji These are the parallelism errors of the X and Y axes of the i-th receiving sub-optical path, respectively.

3. The rapid parallelism adjustment and self-calibration method for a laser transceiver common optical path system based on corner reflectors / corner cone prisms according to claim 1, characterized in that, In step 5, the parallelism error of each emitter optical path during angle adjustment based on the adjustment structure within each emitter optical path is: EX Fi =X Fi *S1 / P,EY Fi =Y Fi *S1 / P; Where S1 represents the pixel resolution of the camera in the first receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y Fi EX represents the X-axis and Y-axis coordinates of the centroid position of the i-th transmitting sub-optical path. Fi and EY Fi These are the parallelism errors of the X and Y axes of the i-th transmitting sub-optical path, respectively.

4. The method for rapid parallelism adjustment and self-calibration of a laser transceiver common optical path system based on corner reflectors / corner cone prisms according to claim 1, characterized in that, Following step 5, there is a further step: calculating the parallelism between any two optical paths using coordinate differences; specifically: The parallelism between the i-th and j-th optical transmission paths is: EX Fi-j =(X Fi -X Fj )*S i / P,EY Fi-j =(Y Fi -Y Fj )*S i / P; Among them, S i X represents the pixel resolution of the camera in the i-th receiving sub-optical path, in urads; P is the magnification of the optical antenna; X Fi and Y Fi The X and Y coordinates of the centroid position of the i-th transmitting sub-optical path are respectively given by X and Y. Fj and Y Fj EX represents the X-axis and Y-axis coordinates of the centroid position of the j-th emitting sub-optical path. Fi-j and EY Fi-j These are the X-axis and Y-axis coordinates of the parallelism error between the i-th and j-th optical paths, respectively.

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