Receiving and transmitting coaxial optical debugging system and receiving and transmitting coaxial optical debugging method

Abstract

The embodiment of the invention provides a receiving and transmitting coaxial optical debugging system and a receiving and transmitting coaxial optical debugging method, and relates to the technical field of optics. The transmitting-receiving coaxial optical debugging system comprises a laser unit, a transmitting end, a receiving end, an adjusting unit, a transmission unit and an observation unit. After an observation unit captures a first light spot and a second light spot corresponding to a reverse light beam and a transmitting light beam, the transmitting end and the receiving end can be coaxially adjusted through an adjusting unit until the light spot center of the first light spot coincides with the light spot center of the second light spot. The adjusting unit directly performs coaxial adjustment on the transmitting end and the receiving end, so that errors caused by replacement of the detector can be reduced, the debugging accuracy and the debugging efficiency are improved, the coaxiality of a transmitting light beam and a receiving light beam is ensured, and the receiving efficiency and the imaging quality of a signal are improved.

Description

Technical Field

[0001] This application relates to the field of optical technologies, and in particular, to a coaxial transceiver optical debugging system and a coaxial transceiver optical debugging method. Background Art

[0002] In a long-distance optical active imaging system, the transmitting and receiving optical paths usually share the same axis, that is, the so-called coaxial transceiver structure. This structure requires that in the entire transmission path from the telescopic antenna of the system to the target object, the illumination beam and the signal photon receiving optical path must be precisely aligned and still maintain coaxial transmission after passing through the beam splitter device. Due to the weak signal in the long-distance transmission link, the coaxial accuracy requirement for the beam is very high. Even a tiny deviation may cause a significant reduction in the signal reception efficiency or even complete loss of the signal. Therefore, during the construction and debugging stage of a long-distance optical active imaging system, the coaxiality of the transmitting beam and the receiving beam must be precisely adjusted, but this process is both time-consuming and laborious. Summary of the Invention

[0003] To at least overcome the above deficiencies in the prior art, the purpose of this application is to provide a coaxial transceiver optical debugging system and a coaxial transceiver optical debugging method.

[0004] In a first aspect, an embodiment of this application provides a coaxial transceiver optical debugging system, which includes a laser unit, a transmitting end, a receiving end, an adjustment unit, a transmission unit, and an observation unit;

[0005] The receiving end is connected to the laser unit, and the receiving end is used to emit a backscattered beam received from the laser unit. The backscattered beam is transmitted to the observation unit via the transmission unit, and the observation unit captures a first light spot corresponding to the backscattered beam;

[0006] The transmitting end is connected to the laser unit, and the transmitting end is used to emit a transmitting beam received from the laser unit. The transmitting beam is transmitted to the observation unit via the transmission unit, and the observation unit captures a second light spot corresponding to the transmitting beam;

[0007] The adjustment unit is respectively connected to the transmitting end and the receiving end. The adjustment unit is used to adjust the position and / or angle of the receiving end based on the first light spot, and the adjustment unit is also used to adjust the position and / or angle of the transmitting end based on the second light spot until the light spot center of the first light spot coincides with the light spot center of the second light spot.

[0008] In a possible implementation manner, the laser unit includes a connected laser and a beam splitter, and the beam splitter is used to split the laser emitted by the laser to obtain the transmitting beam and the backscattered beam.

[0009] In a possible implementation, the adjustment unit further includes a first adjustment unit and a second adjustment unit;

[0010] The first adjustment unit is connected to the receiving end, and the first adjustment unit is configured to adjust the position and / or angle of the receiving end based on the first light spot;

[0011] The second adjustment unit is connected to the transmitting end, and the second adjustment unit is configured to adjust the position and / or angle of the transmitting end based on the second light spot.

[0012] In a possible implementation, the transmission unit includes a coupling lens, a perforated mirror, and a long-focus collimator. Among them, the long-focus collimator is used to simulate a long-space distance transmission path;

[0013] The transmitted light beam is transmitted to the observation unit via the long-focus collimator;

[0014] The retroreflected light beam is focused by the coupling lens and then transmitted to the observation unit via the perforated mirror and the long-focus collimator in sequence. Among them, the perforated mirror includes a perforated area, and the shape of the perforated area includes a square.

[0015] In a possible implementation, the observation unit includes an infrared CCD camera.

[0016] In a second aspect, an embodiment of the present application further provides a coaxial transceiver optical debugging method, which is applied to the coaxial transceiver optical debugging system according to any one of the first aspects. The method includes:

[0017] Generating a transmitted light beam and a retroreflected light beam by the laser unit, and transmitting the transmitted light beam and the retroreflected light beam to the transmitting end and the receiving end respectively;

[0018] Receiving the transmitted light beam by the transmitting end, and transmitting the transmitted light beam to the observation unit via the transmission unit;

[0019] Receiving the retroreflected light beam by the receiving end, and transmitting the retroreflected light beam to the observation unit via the transmission unit;

[0020] Capturing a first light spot corresponding to the retroreflected light beam and a second light spot corresponding to the transmitted light beam by the observation unit, and adjusting the positions and / or angles of the transmitting end and the receiving end by the adjustment unit based on the first light spot and the second light spot until the light spot centers of the first light spot and the second light spot coincide.

[0021] In a possible implementation, the laser unit includes a laser and a beam splitter connected thereto. The steps of generating an emission beam and a retro-reflected beam by the laser unit and transmitting the emission beam and the retro-reflected beam to the emission end and the reception end respectively include:

[0022] The beam splitter splits the laser beam emitted by the laser to obtain the emission beam and the retro-reflected beam;

[0023] The emission beam and the retro-reflected beam are respectively transmitted to the emission end and the reception end through optical fibers.

[0024] In a possible implementation, the transmission unit includes a coupling lens, a perforated mirror, and a long-focal-length collimator. The steps of the reception end receiving the retro-reflected beam and transmitting the retro-reflected beam to the observation unit through the transmission unit include:

[0025] The reception end receives the retro-reflected beam and transmits the retro-reflected beam to the coupling lens;

[0026] The coupling lens collimates the retro-reflected beam, and the collimated retro-reflected beam is sequentially transmitted to the observation unit through the perforated mirror and the long-focal-length collimator.

[0027] In a possible implementation, the adjustment unit includes a first adjustment unit and a second adjustment unit. The first adjustment unit is connected to the emission end, and the second adjustment unit is connected to the reception end;

[0028] The steps of the observation unit capturing a first light spot corresponding to the retro-reflected beam and a second light spot corresponding to the emission beam, and the adjustment unit adjusting the position and / or angle of the emission end and the reception end based on the first light spot and the second light spot until the light spot centers of the first light spot and the second light spot coincide include:

[0029] Move the observation unit outside the focal plane of the long-focal-length collimator and block the emission beam emitted by the emission end;

[0030] The observation unit captures a first light spot corresponding to the retro-reflected beam, and the first adjustment unit adjusts the position and / or angle of the reception end based on the first light spot until the intensity distributions of the four sides of the light spot in the first light spot are consistent, where the shape of the light spot of the first light spot includes a square;

[0031] The second light spot corresponding to the emitted light beam is captured by the observation unit, and the position and / or angle of the emitting end is adjusted by the second adjustment unit based on the second light spot until the second light spot is at the center of the first light spot shape.

[0032] In a possible implementation manner, after the step of capturing, by the observation unit, the first light spot corresponding to the retro-reflected light beam and the second light spot corresponding to the emitted light beam, and adjusting, by the adjustment unit, the positions and / or angles of the emitting end and the receiving end based on the first light spot and the second light spot until the light spot centers of the first light spot and the second light spot coincide, the method further includes:

[0033] The observation unit is moved into the focal plane of the long focal length collimator, the observation unit captures the first light spot corresponding to the retro-reflected light beam and the second light spot corresponding to the emitted light beam, and it is detected whether the light intensity centroids of the first light spot and the second light spot coincide;

[0034] If the light intensity centroids of the first light spot and the second light spot do not coincide, the positions and / or angles of the emitting end and the receiving end are adjusted based on the first light spot and the second light spot until the light spot center of the first light spot coincides with the light intensity centroid center of the second light spot.

[0035] Based on any of the above aspects, the transceiver coaxial optical debugging system and the transceiver coaxial optical debugging method provided by the embodiments of the present application include a laser unit, an emitting end, a receiving end, an adjustment unit, a transmission unit, and an observation unit. After the observation unit captures the first light spot and the second light spot corresponding to the retro-reflected light beam and the emitted light beam, the coaxial adjustment of the emitting end and the receiving end can be respectively performed through the adjustment unit until the light spot centers of the first light spot and the second light spot coincide. By directly performing coaxial adjustment on the emitting end and the receiving end through the adjustment unit, the error caused by replacing the detector can be reduced, the debugging accuracy and efficiency can be improved, and at the same time, the coaxiality of the emitted light beam and the received light beam can be ensured, and the signal reception efficiency and imaging quality can be improved. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be referred to in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Structural schematic of the transceiver coaxial optical debugging system provided by the embodiments of the present application Figure 1 ;

[0038] Figure 2 Structural schematic of the coaxial transceiver optical debugging system provided by the embodiment of the present application Figure 2 ;

[0039] Figure 3 A spot image during the debugging process;

[0040] Figure 4 Another spot image during the debugging process;

[0041] Figure 5 Flow schematic of the coaxial transceiver optical method provided by the embodiment of the present application Figure 1 ;

[0042] Figure 6 For Figure 5 Sub-step flow schematic diagram of step S140 in

[0043] Figure 7 Flow schematic of the coaxial transceiver optical method provided by the embodiment of the present application Figure 2 ;

[0044] Figure 8 Spot image after debugging is completed. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but is merely representative of the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0047] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0048] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0049] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, terms such as "arrangement", "connection", "coupling", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] It should be noted that, without conflict, different features in the embodiments of the present application can be combined with each other.

[0051] The inventor found that in some related technologies, a CCD camera may be placed at the receiving end R to receive the background light of the telescopic antenna, obtain the collected standard centroid position, then operate the laser to collect the real-time centroid position of the image, calculate the deviation between the two centroid positions, and control the mirror and adjustment frame in the system to minimize the deviation. However, after the debugging of this solution is completed, the detector needs to be replaced at the position of the CCD camera, and this process will cause a new deviation between the emitted light beam and the signal light beam, affecting the signal reception efficiency and the imaging quality.

[0052] To solve the problems in the prior art, please refer to Figure 1 , an embodiment of the present application provides a coaxial transceiver optical debugging system 10, which includes a laser unit 110, a transmitting end T, a receiving end R, an adjustment unit 120, a transmission unit 130, and an observation unit 140. Among them, the adjustment unit 120 is respectively connected to the transmitting end T and the receiving end R, and the light output direction of the transmission unit 130 faces the photosensitive side of the observation unit 140.

[0053] The receiving end R can be connected to the laser unit 110. The receiving end R is used to emit the retro-reflected beam received from the laser unit 110. The retro-reflected beam is transmitted to the observation unit 140 via the transmission unit 130, and the observation unit 140 captures the first light spot corresponding to the retro-reflected beam. Among them, the retro-reflected beam is used to simulate the beam that returns along the original path according to the optical reciprocity in an optical signal system (such as a lidar system, an optical detection system, a long-distance optical active imaging system, etc.).

[0054] The transmitting end T can be connected to the laser unit 110. The transmitting end T is used to emit the transmitting beam received from the laser unit 110. The transmitting beam is transmitted to the observation unit 140 via the transmission unit 130, and the observation unit 140 captures the second light spot corresponding to the transmitting beam.

[0055] After the observation unit 140 captures the first light spot and the second light spot corresponding to the transmitting beam and the retro-reflected beam, the spot shape, position, intensity distribution, etc. of the first light spot and the second light spot can be analyzed. The adjustment unit 120 can adjust the positions and / or angles of the receiving end R and the transmitting end T respectively based on the analysis results of the first light spot and the second light spot until the spot center of the first light spot coincides with the spot center of the second light spot.

[0056] In the above structure, after the observation unit 140 captures the first light spot and the second light spot corresponding to the retro-reflected beam and the transmitting beam, the coaxial adjustment of the transmitting end T and the receiving end R is respectively performed by the adjustment unit 120 until the spot center of the first light spot coincides with the spot center of the second light spot. By directly performing the coaxial adjustment of the transmitting end T and the receiving end R by the adjustment unit 120, the error caused by replacing the detector can be reduced, the debugging accuracy and debugging efficiency can be improved, and at the same time, the coaxiality of the transmitting beam and the receiving beam can be ensured, and the signal reception efficiency and imaging quality can be improved.

[0057] In some possible embodiments, please refer to Figure 2 , the laser unit 110 may include a connected laser 111 and a beam splitter 112. The beam splitter 112 is used to split the laser emitted by the laser 111 to obtain a transmitting beam and a retro-reflected beam. Exemplarily, the beam splitter 112 may be a 5:5 beam splitter. The 5:5 beam splitter can be connected to the transmitting end T through a polarization-maintaining optical fiber and connected to the receiving end R through a multimode optical fiber. Alternatively, the laser unit 110 may include a first laser connected to the transmitting end T and a second laser connected to the receiving end R. The first laser is used to emit the transmitting beam, and the second laser is used to emit the retro-reflected beam.

[0058] Further, please refer to again Figure 2, the adjustment unit 120 further includes a first adjustment unit 121 and a second adjustment unit 122. The first adjustment unit 121 is connected to the receiving end R. After the observation unit 140 captures the first light spot corresponding to the retro-reflected light beam, the first adjustment unit 121 can adjust the position and / or angle of the receiving end R according to the shape, position, and intensity distribution of the first light spot. The second adjustment unit 122 is connected to the transmitting end T. After the observation unit 140 captures the second light spot corresponding to the transmitting light beam, the second adjustment unit 122 can adjust the position and / or angle of the transmitting end T according to the shape, position, and intensity distribution of the second light spot. Exemplarily, the first adjustment unit 121 and the second adjustment unit 122 may include a five-dimensional adjustment mount, as well as a combination of a three-dimensional adjustment mount and a mirror with three-dimensional adjustment functions.

[0059] In this embodiment, after analyzing the spot shape, position, and intensity distribution of the transmitting light beam and the retro-reflected light beam through the observation unit 140, the coaxial adjustment of the receiving end R and the transmitting end T is directly performed through the first adjustment unit 121 and the second adjustment unit 122, which can not only reduce the error caused by replacing the detector, improve the debugging accuracy and efficiency, but also ensure the coaxiality of the transmitting light beam and the receiving light beam, and improve the signal receiving efficiency and imaging quality.

[0060] Furthermore, the transmission unit 130 may include a coupling lens, a perforated mirror, and a long-focal-length collimator. Among them, the long-focal-length collimator is used to simulate a long-space-distance transmission path. The transmitting light beam is transmitted to the observation unit 140 via the long-focal-length collimator.

[0061] In some embodiments, the retro-reflected light beam may directly exit from the multimode optical fiber. Due to the characteristics of the multimode optical fiber, the retro-reflected light beam exiting from the multimode optical fiber usually has a large divergence and may not fully cover the perforated area of the perforated mirror. For this reason, the retro-reflected light beam can be collimated by the coupling lens first, and then transmitted to the observation unit 140 via the perforated mirror and the long-focal-length collimator in sequence, so as to ensure that the retro-reflected light beam can cover most of the perforated area of the mirror. Among them, the perforated mirror includes a perforated area, and the shape of the perforated area includes a square. The observation unit 140 includes, but is not limited to, an infrared CCD camera.

[0062] In the above structure, the observation unit 140 can be first moved outside the focal plane of the long-focal-length collimator, and the transmitting light beam emitted by the transmitting end T can be blocked. Then, the observation unit 140 captures the square first light spot formed by the retro-reflected light beam after passing through the perforated mirror, and adjusts the position and / or angle of the receiving end R according to the intensities of the four sides of the first light spot until the intensity distributions of the four sides of the first light spot are consistent. For details, please refer to Figure 3Finally, the emission beam emitted by the transmitter T is no longer blocked, and the emission beam is transmitted to the observation unit 140 through a long-focal-length collimator. The observation unit 140 captures the second light spot corresponding to the emission beam, and adjusts the transmitter T according to the second light spot until the second light spot is always at the center position of the first light spot. For details, please refer to Figure 4 In this way, not only can the error caused by replacing the detector be reduced, the debugging accuracy and efficiency be improved, but also the coaxiality of the emission beam and the reception beam can be ensured, and the signal reception efficiency and imaging quality can be improved.

[0063] Based on the same inventive concept, the present application also provides a coaxial transceiver optical debugging method, which can be applied to the coaxial transceiver optical debugging system 10 in the above embodiment. For details, please refer to Figure 5 , Figure 5 is a schematic flowchart of the coaxial transceiver optical debugging method. The following combines Figure 5 to describe each step of the coaxial transceiver optical debugging method in detail.

[0064] Step S110: Generate an emission beam and a counter-beam by the laser unit, and transmit the emission beam and the counter-beam to the transmitter and the receiver respectively.

[0065] In this step, the laser unit 110 may include a connected laser 111 and a beam splitter 112. Specifically, the laser 111 may first emit a specific laser according to specific parameters, and then the beam splitter 112 splits the laser emitted by the laser 111 to obtain an emission beam and a counter-beam. Finally, the emission beam and the counter-beam are respectively transmitted to the transmitter T and the receiver R through optical fibers. Among them, the emission beam can be transmitted to the transmitter T through a polarization-maintaining optical fiber. The counter-beam can be transmitted to the receiver R through a multimode optical fiber.

[0066] Alternatively, the laser unit 110 may further include a first laser connected to the transmitter T and a second laser connected to the receiver R. Specifically, the first laser can emit an emission beam, and the emission beam is transmitted to the transmitter T through a polarization-maintaining optical fiber. The second laser emits a counter-beam, and the counter-beam is transmitted to the receiver R through a multimode optical fiber.

[0067] Step S120: The transmitter receives the emission beam and transmits the emission beam to the observation unit through the transmission unit.

[0068] Step S130: The receiver receives the counter-beam and transmits the counter-beam to the observation unit through the transmission unit.

[0069] Step S140: The observation unit captures the first light spot corresponding to the retro-reflected beam and the second light spot corresponding to the emission beam, and the adjustment unit adjusts the positions and / or angles of the receiving end and the transmitting end based on the first light spot and the second light spot until the light spot centers of the first light spot and the second light spot coincide.

[0070] In this step, after the observation unit 140 captures the first light spot and the second light spot corresponding to the retro-reflected beam and the emission beam, the alignment and coaxiality of the retro-reflected beam and the emission beam can be analyzed according to the light spot shapes, positions, intensity distributions, etc. of the first light spot and the second light spot. Then, according to the analysis results, the adjustment unit 120 adjusts the positions and / or angles of the receiving end R and the transmitting end T until the light spot centers of the first light spot and the second light spot coincide. Among them, the observation unit 140 includes but is not limited to an infrared CCD camera.

[0071] In this embodiment, according to the first light spot and the second light spot captured by the observation unit 140, the adjustment unit 120 respectively performs coaxial adjustment on the transmitting end T and the receiving end R until the light spot centers of the first light spot and the second light spot coincide. By directly performing coaxial adjustment on the transmitting end T and the receiving end R through the adjustment unit 120, the error caused by replacing the detector can be reduced, the debugging accuracy and efficiency can be improved, and at the same time, the coaxiality of the emission beam and the receiving beam can be ensured, and the signal reception efficiency and imaging quality can be improved.

[0072] Furthermore, the transmission unit 130 may include a coupling lens, a perforated mirror, and a long-focal-length collimator. Among them, the long-focal-length collimator is used to simulate a long-space-distance transmission path, and the perforated mirror includes a perforated area, and the shape of the perforated area includes a square. In step S120, the emission beam is directly transmitted to the observation unit 140 via the long-focal-length collimator. In step S130, the retro-reflected beam may be first received by the receiving end R. However, since the receiving end R is connected to the laser unit 110 through a multimode optical fiber, the retro-reflected beam emitted from the multimode optical fiber usually has a large divergence and may not completely cover the perforated area of the perforated mirror. For this reason, the retro-reflected beam can be first transmitted to the coupling lens, and after the coupling lens collimates the retro-reflected beam, the focused retro-reflected beam is then transmitted to the observation unit 140 via the perforated mirror and the long-focal-length collimator in sequence, so as to ensure that the retro-reflected beam can cover most of the perforated area of the mirror.

[0073] Even further, the adjustment unit 120 may include a first adjustment unit 121 and a second adjustment unit 122. The first adjustment unit 121 is connected to the transmitting end T, and the second adjustment unit 122 is connected to the receiving end R. Please refer to Figure 6 , step S140 can be implemented by the following method.

[0074] Step S141: Move the observation unit outside the focal plane of the long focal length collimator and block the emission beam emitted by the emission end.

[0075] Step S142: The observation unit captures the first light spot corresponding to the retro-reflected beam, and the first adjustment unit adjusts the position and / or angle of the receiving end based on the first light spot until the intensity distribution of the four sides of the light spot in the first light spot is consistent.

[0076] Please refer to again Figure 3 , the light spot shape of the first light spot captured by the observation unit 140 includes a square. The analysis can be performed based on the intensity of the four sides of the light spot and the light spot shape in the first light spot. The position and / or angle of the receiving end R is adjusted by the first adjustment unit 121 until the intensity distribution of the four sides of the light spot in the first light spot is consistent. Among them, the first adjustment unit 121 can be a five-dimensional adjustment mount or a combination of a three-dimensional adjustment mount and a mirror with three-dimensional adjustment function.

[0077] Step S143: The observation unit captures the second light spot corresponding to the emission beam, and the second adjustment unit adjusts the position and / or angle of the emission end based on the second light spot until the second light spot is at the center of the first light spot shape.

[0078] Please refer to again Figure 4 , after the adjustment of the first light spot is completed, the observation unit 140 can first capture the second light spot corresponding to the emission beam. According to the relative position between the first light spot and the second light spot, the position and / or angle of the emission end T is adjusted by the second adjustment unit 122 so that the second light spot is at the center of the first light spot shape, and no matter whether the observation unit 140 moves forward or backward, the second light spot is always at the center of the first light spot shape.

[0079] Please refer to Figure 7 , to verify the coaxial adjustment effect of the emission beam on the retro-reflected beam, the transceiver coaxial optical debugging method provided in the embodiment of the present application may further include the following method.

[0080] Step S150: Move the observation unit into the focal plane of the long focal length collimator. The observation unit captures the first light spot corresponding to the retro-reflected beam and the second light spot corresponding to the emission beam, and detects whether the first light spot coincides with the second light spot.

[0081] Step S160: If the first light spot does not coincide with the second light spot, adjust the position and / or angle of the emission end and the receiving end based on the first light spot and the second light spot until the center of the light spot of the first light spot coincides with the center of the second light spot.

[0082] In this embodiment, when the observation unit 140 is moved into the focal plane of the long focal length collimator and it is detected that the first light spot coincides with the second light spot, please refer to specificallyFigure 8 , it can be determined that the optical paths of the transmitting end T and the receiving end R are on the same axis, that is, the coaxial adjustment of the transmitting end T and the receiving end R is completed. When the first light spot does not coincide with the second light spot, the positions and / or angles of the transmitting end T and the receiving end R are adjusted based on the first light spot and the second light spot until the center of the first light spot coincides with the center of the second light spot. For details, please refer to step S140.

[0083] In summary, the embodiment of the present application provides a coaxial transceiver optical debugging system and a coaxial transceiver optical debugging method. The coaxial transceiver optical debugging system includes a laser unit, a transmitting end, a receiving end, an adjustment unit, a transmission unit, and an observation unit. After the observation unit captures the first light spot and the second light spot corresponding to the retroreflected beam and the transmitted beam, the coaxial adjustment of the transmitting end and the receiving end can be respectively performed through the adjustment unit until the center of the first light spot coincides with the center of the second light spot. By directly performing coaxial adjustment on the transmitting end and the receiving end through the adjustment unit, the error caused by replacing the detector can be reduced, the debugging accuracy and efficiency can be improved, and at the same time, the coaxiality of the transmitted beam and the received beam can be ensured, and the signal reception efficiency and imaging quality can be improved.

[0084] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A transceiver coaxial optical debugging system, characterized in that: It includes a laser unit, a transmitting end, a receiving end, an adjusting unit, a transmission unit and an observation unit; The receiving end is connected to the laser unit, and the receiving end is used to emit the back-hitting light beam received from the laser unit, and the back-hitting light beam is transmitted to the observation unit via the transmission unit, and the observation unit captures the first light spot corresponding to the back-hitting light beam; The transmitting end is connected to the laser unit, and the transmitting end is used to emit an emission light beam received from the laser unit, and the emission light beam is transmitted to the observation unit via the transmission unit, and the observation unit captures a second light spot corresponding to the emission light beam; The adjustment unit is connected to the transmitting end and the receiving end respectively, and is used to adjust the position and / or angle of the receiving end based on the first light spot. The adjustment unit is also used to adjust the position and / or angle of the transmitting end based on the second light spot until the spot center of the first light spot coincides with the spot center of the second light spot.

2. The transceiver coaxial optical debugging system according to claim 1, characterized in that: The laser unit comprises a connected laser and a beam splitter, wherein the beam splitter is used to split the laser emitted by the laser to obtain the emitted light beam and the reflected light beam.

3. The transceiver coaxial optical debugging system according to claim 1, characterized in that: The adjustment unit further includes a first adjustment unit and a second adjustment unit; The first adjustment unit is connected to the receiving end, and the first adjustment unit is used to adjust the position and / or angle of the receiving end based on the first light spot; The second adjustment unit is connected to the emitting end, and is used to adjust the position and / or angle of the emitting end based on the second light spot.

4. The transceiver coaxial optical debugging system according to claim 1, characterized in that: The transmission unit includes a coupling lens, a perforated reflector, and a long focal length collimator, wherein the long focal length collimator is used to simulate a long spatial distance transmission path; The emission light beam is transmitted to the observation unit via the long focal length collimator; After being collimated by the coupling lens, the reflected light beam is transmitted to the observation unit via the perforated reflector and the long focal length collimator in sequence, wherein the perforated reflector includes a perforated area, and the shape of the perforated area includes a square.

5. The transceiver coaxial optical debugging system according to claim 1, characterized in that: The observation unit includes an infrared CCD camera.

6. A coaxial optical debugging method for receiving and transmitting, characterized in that: The method applied to the transceiver coaxial optical debugging system according to any one of claims 1 to 5 above comprises: The laser unit generates a transmission beam and a reflection beam, and transmits the transmission beam and the reflection beam to the transmission end and the receiving end respectively; The transmitting end receives the transmitting light beam, and transmits the transmitting light beam to the observing unit via the transmitting unit; The receiving end receives the reflected light beam, and transmits the reflected light beam to the observation unit via the transmission unit; The observation unit captures a first light spot corresponding to the reflected light beam and a second light spot corresponding to the emitted light beam, and the adjustment unit adjusts the position and / or angle of the transmitting end and the receiving end based on the first light spot and the second light spot until the spot center of the first light spot coincides with the spot center of the second light spot.

7. The coaxial optical debugging method for transmitting and receiving according to claim 6, characterized in that: The laser unit includes a connected laser and a beam splitter, and the steps of generating a transmission beam and a reflection beam by the laser unit, and transmitting the transmission beam and the reflection beam to the transmitting end and the receiving end respectively include: The beam splitter splits the laser light emitted by the laser to obtain the emission light beam and the reflected light beam; The transmitting light beam and the reflected light beam are transmitted to the transmitting end and the receiving end respectively through optical fibers.

8. The coaxial optical debugging method for transmitting and receiving according to claim 7, characterized in that: The transmission unit includes a coupling lens, a perforated reflector, and a long focal length collimator. The step of receiving the reflected light beam by the receiving end and transmitting the reflected light beam to the observation unit via the transmission unit includes: The receiving end receives the back-beating light beam and transmits the back-beating light beam to the coupling lens; The coupling lens collimates the reflected light beam, and transmits the collimated reflected light beam to the observation unit via the punched reflector and the long focal length collimator in sequence.

9. The coaxial optical debugging method for transmitting and receiving according to claim 8, characterized in that: The adjustment unit includes a first adjustment unit and a second adjustment unit, the first adjustment unit is connected to the transmitting end, and the second adjustment unit is connected to the receiving end; The step of capturing, by the observation unit, a first light spot corresponding to the reflected light beam and a second light spot corresponding to the emitted light beam, and adjusting, by the adjustment unit, the positions and / or angles of the emitting end and the receiving end based on the first light spot and the second light spot until the light spot center of the first light spot coincides with the light spot center of the second light spot, comprises: The observation unit is moved outside the focal plane of the long focal length collimator to block the emission light beam emitted by the emission end; The observation unit captures a first light spot corresponding to the reflected light beam, and the first adjustment unit adjusts the position and / or angle of the receiving end based on the first light spot until the intensity distribution of the four sides of the first light spot is consistent, wherein the light spot shape of the first light spot includes a square; The observation unit captures a second light spot corresponding to the emission light beam, and the second adjustment unit adjusts the position and / or angle of the emission end based on the second light spot until the second light spot is at the center of the first light spot shape.

10. The coaxial optical debugging method for transmitting and receiving according to claim 9, characterized in that: After the step of capturing the first light spot corresponding to the reflected light beam and the second light spot corresponding to the emitted light beam by the observation unit, and adjusting the position and / or angle of the transmitting end and the receiving end by the adjustment unit based on the first light spot and the second light spot until the spot center of the first light spot coincides with the spot center of the second light spot, the method further includes: The observation unit is moved to the focal plane of the long focal length collimator, and the observation unit captures a first light spot corresponding to the reflected light beam and a second light spot corresponding to the emitted light beam, and detects whether the light intensity centroid of the first light spot coincides with that of the second light spot; If the light intensity centroids of the first light spot and the second light spot do not coincide, the positions and / or angles of the transmitting end and the receiving end are adjusted based on the first light spot and the second light spot until the light spot center of the first light spot coincides with the light intensity centroid center of the second light spot.

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