Automatic axis calibration device of photoelectric tracker and photoelectric tracker

Abstract

The utility model discloses a photoelectric tracker automatic axis calibration device and a photoelectric tracker, the photoelectric tracker automatic axis calibration device comprises a fast control reflector arranged in a load box, the load box is rotatably connected with a rotary table, a Kuder mirror group is arranged in the rotary table, and the fast control reflector is located on an emergent light path of the Kuder mirror group. A spectroscope is arranged on a reflection light path of the rapid control reflector, a reflection surface of the spectroscope is opposite to a reflection surface of the rapid control reflector, and an optical axis detection mechanism is arranged on a transmission light path of the spectroscope and connected with the rapid control reflector. The optical axis detection mechanism is used for detecting a laser optical axis angle and outputting an optical axis detection signal. The laser reflected by the spectroscope enters the emission optical system. According to the utility model, the optical axis detection mechanism detects the optical axis direction of the laser after being turned by the Kuder optical path, and when the optical axis deviates, the rapid control reflector is controlled to adjust the angle, so that the optical axis can be rapidly corrected, and the parallelism of the laser optical axis and the detection optical axis is ensured.

Description

Technical Field

[0001] This utility model relates to the field of optical and mechanical technology, and in particular to an automatic axis alignment device for a photoelectric tracker and a photoelectric tracker. Background Technology

[0002] In the field of laser tracking, traditional photoelectric trackers typically mount optical loads such as the detection optics system and the laser emission system on an azimuth-elevation tracking turntable. With technological advancements, the demand for increased laser output power is growing, but this also leads to a significant increase in the size and weight of the laser. To ensure the tracking performance of the turntable, when the laser's size and weight reach a certain level, it is generally mounted at the bottom of the turntable. The laser beam is emitted from the load box after passing through the Couder optical path and being guided internally by the turntable. The Couder optical path ensures that the laser beam's output optical axis is parallel to the optical axes of other optical loads (primarily the detection optics system) within the load box, allowing the laser beam to rotate together with the load box in the azimuth and elevation directions.

[0003] like Figure 1 As shown, a traditional photoelectric tracker includes a base box 9, a turntable 10, and a load box 11. The turntable is mounted on the base box 9, and the two ends of the turntable 10 are connected to the load box 11. The base box 9, turntable 10, and load box 11 are internally connected to form an optical path channel. A laser 1 is installed inside the base box 9. A Coudre optical path is installed on the output optical path of the laser 1. The Coudre optical path is located in the optical path channel and includes a first Coudre mirror 2, a second Coudre mirror 3, a third Coudre mirror 4, a fourth Coudre mirror 5, and a fifth Coudre mirror 6. The first Coudre mirror 2 is located inside the base box 9, the second Coudre mirror 3, the third Coudre mirror 4, and the fourth Coudre mirror 5 are located inside the turntable 10, and the fifth Coudre mirror 6 is located inside the load box 11. The laser emitted by the laser 1 is guided by the Coudre optical path and enters the emission optical system 7 inside the load box 11, and is then emitted to the target by the emission optical system 7. Theoretically, the laser optical axis of the emission optical system 7 should be parallel to the optical axis of the detection optical system 8.

[0004] To ensure the parallelism between the laser beam, after being redirected by the Kuder optical path, and the optical axes of other optical loads, traditional light guide turntables require consideration of the orthogonality of the turntable's azimuth-elevation axis system during design and assembly. Furthermore, during Kuder lens assembly, the parallelism of the optical axis with the azimuth and elevation axes must be ensured. Normally, the laser and detector optical axes are parallel after calibration. However, due to the considerable distance between the base box and the optical loads, environmental factors such as temperature changes can cause turntable deformation, affecting the stability of the Kuder optical path's optical axis and resulting in non-parallelism. Currently, structural design and assembly cannot completely solve this problem; therefore, a new solution is needed to ensure the stability of the Kuder optical path's optical axis. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, ensure the stability of the optical axis of the Kuder optical path in the photoelectric tracker, reduce the impact of turntable deformation or improper installation on the Kuder optical path, and provide an automatic axis alignment device and a photoelectric tracker.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic axis alignment device for a photoelectric tracker includes a fast-control mirror, which is installed inside a load box and receives the emitted light from a Coudé mirror assembly. A beam splitter is installed on the reflected light path of the fast-control mirror, with the reflecting surface of the beam splitter facing the reflecting surface of the fast-control mirror. The laser light reflected by the beam splitter enters the transmitting optical system. An optical axis detection mechanism is installed on the transmission light path of the beam splitter, and the optical axis detection signal output terminal of the optical axis detection mechanism is connected to the input terminal of the fast-control mirror. The optical axis detection mechanism is used to detect the laser optical axis angle and output an optical axis detection signal.

[0008] This invention uses an optical axis detection mechanism to detect the direction of the optical axis of the laser after it has been turned by the Kuder optical path. When the optical axis is found to be deviated, the mechanism controls the reflector to adjust its angle quickly, which can quickly correct the optical axis and ensure the parallelism between the laser optical axis and the detection optical axis.

[0009] Preferably, the optical axis detection mechanism includes a telephoto optical system and a detector. The detector is disposed in the outgoing optical path of the telephoto optical system. The output end of the detector is connected to the input end of the fast control mirror. The telephoto optical system is used to transmit laser light through the beam splitter. The detector is used to image the laser light emitted from the telephoto optical system and detect optical axis deviation before outputting an optical axis detection signal.

[0010] Preferably, the telephoto optical system includes a primary mirror, a first mirror, a filter, and a second mirror arranged sequentially along the optical path, with the primary mirror located on the incident side of the telephoto optical system.

[0011] Preferably, the optical path of the telephoto optical system is further provided with a first reflecting mirror and a second reflecting mirror. The first reflecting mirror and the second reflecting mirror are used to fold the optical path. The first reflecting mirror is located in the optical path between the primary mirror and the first mirror, and the second reflecting mirror is located in the optical path between the second mirror and the detector.

[0012] A photoelectric tracker with an automatic axis alignment device includes a fast control mirror disposed within a load box, which is rotatably connected to a turntable. A Coudé mirror assembly is disposed within the turntable. The fast control mirror receives the emitted light from the Coudé mirror assembly. A beam splitter is disposed on the reflected light path of the fast control mirror, with its reflecting surface facing the reflecting surface of the fast control mirror. The laser light reflected by the beam splitter enters an emitting optical system. An optical axis detection mechanism is disposed on the transmitted light path of the beam splitter, detecting the laser optical axis angle and outputting an optical axis detection signal. The output terminal of the optical axis detection signal of the optical axis detection mechanism is connected to the input terminal of the fast control mirror.

[0013] Preferably, a third reflecting mirror is provided on the reflected light path of the beam splitter, and the reflected light path of the third reflecting mirror is coaxially arranged with the incident light path of the emitting optical system.

[0014] Preferably, a base box is provided at the bottom of the turntable, and a laser is provided inside the base box. The Couder mirror group is used to reflect the laser emitted by the laser.

[0015] Preferably, a first Couder mirror is provided inside the base box, which is used to reflect the laser emitted by the laser.

[0016] Preferably, the Couder mirror group includes a second Couder mirror, a third Couder mirror, and a fourth Couder mirror arranged sequentially along the optical path. The second Couder mirror is located on the incident side of the Couder mirror group. The second Couder mirror is used to reflect the laser light reflected by the first Couder mirror, and the fourth Couder mirror is used to emit the laser light reflected by the Couder optical path.

[0017] This invention can eliminate most of the optical axis deviation caused by turntable deformation, and can appropriately relax the requirements for the orthogonality of the turntable azimuth-pitch axis system and the accuracy of optical axis calibration, thereby reducing the difficulty of equipment assembly and adjustment, ensuring the optical axis accuracy of the system, and has high practical value. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the optical path principle of a traditional photoelectric tracker;

[0020] Figure 2 This is a schematic diagram of the optical path principle of the automatic shaft alignment device in Example 1;

[0021] Figure 3 This is a schematic diagram of the assembly structure of the automatic shaft alignment device in the load box according to Embodiment 1;

[0022] Figure 4This is a schematic diagram of the optical path of the optical axis detection mechanism in Embodiment 1;

[0023] Figure 5 This is a schematic diagram of the assembly structure of the optical axis detection mechanism in the load box in Embodiment 1;

[0024] Figure 6 This is a schematic diagram of the optical path principle of the photoelectric tracker in Example 2.

[0025] Explanation of reference numerals in the attached diagram: 1-Laser, 2-First Couder, 3-Second Couder, 4-Third Couder, 5-Fourth Couder, 6-Fifth Couder, 7-Emitting optical system, 8-Detecting optical system, 9-Base box, 10-Turntable, 11-Load box, 12-Fast control mirror, 13-Beam splitter, 14-Third mirror, 15-Optical axis detection mechanism, 16-Primary mirror, 17-First mirror, 18-First primary mirror, 19-Filter, 20-Second mirror, 21-Second mirror, 22-Detector. Detailed Implementation

[0026] Example 1

[0027] like Figure 2 and Figure 3 As shown, the present invention provides an automatic axis alignment device for a photoelectric tracker, including a fast control reflector 12, which is installed inside a load box 11 and receives the emitted light from the Coudé mirror group. A beam splitter 13 is installed on the reflected light path of the fast control reflector 12, with the reflecting surface of the beam splitter 13 facing the reflecting surface of the fast control reflector 12. The laser reflected by the beam splitter 13 enters the emission optical system 7. An optical axis detection mechanism 15 is installed on the transmission light path of the beam splitter 13, which detects the laser optical axis angle and outputs an optical axis detection signal. The output terminal of the optical axis detection signal of the optical axis detection mechanism 15 is connected to the input terminal of the fast control reflector 12.

[0028] like Figure 4 and Figure 5As shown, the optical axis detection mechanism 15 includes a telephoto optical system and a detector 22. The detector 22 is disposed in the output optical path of the telephoto optical system, and its output is connected to the input of the fast-control mirror 12. The telephoto optical system is used to transmit laser light transmitted through the beam splitter 13, and the detector 22 is used to image the laser light emitted from the telephoto optical system and detect optical axis deviation before outputting an optical axis detection signal. Specifically, the telephoto optical system includes a primary mirror 16, a first mirror 17, a first reflector 18, a filter 19, a second mirror 20, and a second reflector 21 arranged sequentially. The primary mirror 16 is located on the incident side of the telephoto optical system. Specifically, to adapt to the load box structure and reduce the overall size of the optical axis detection mechanism 15, a first reflector 17 and a second reflector 21 are also disposed in the optical path of the telephoto optical system. The first reflector 17 and the second reflector 21 are used to fold the optical path. The first reflector 17 is located in the optical path between the primary mirror 16 and the first reflector 18, and the second reflector 21 is located in the optical path between the second mirror 20 and the detector 22.

[0029] In this embodiment, the specific process is as follows: the automatic axis alignment device is installed in the load box 11 of the conventional photoelectric tracker. The reflector 12 is quickly controlled to reflect the emitted light from the Coudé mirror group to the beam splitter 13. The beam splitter 13 reflects most of the laser energy into the emitting optical system 7 and then emits it out. The remaining small portion of the laser energy enters the optical axis detection mechanism 15. The optical axis detection mechanism 15 is fixed in the load box 11, and its optical axis is not affected by changes in the turntable attitude.

[0030] The laser light entering the optical axis detection mechanism 15 passes through the telephoto optical system and is imaged on the photosensitive surface of the detector 22. When the laser optical axis is in the theoretical direction, the imaged spot is at the center of the detector 22. When the laser optical axis deviates from the theoretical direction, the imaged spot also deviates. When the optical axis detection mechanism 15 detects a deviation in the laser optical axis, it sends an optical axis detection signal to the fast control mirror 12. Under the control of its internal controller, the fast control mirror 12 rotates in the opposite direction by a corresponding angle, thereby achieving real-time correction of the emitted laser optical axis and ensuring that the laser emission optical axis is always parallel to the optical axis of the detection optical system 8.

[0031] The automatic axis alignment device of this invention detects the direction of the optical axis after the laser beam is turned by the optical axis detection mechanism 15. When the optical axis is found to be deviated, the optical axis can be quickly corrected to ensure the parallelism between the laser optical axis and the detection optical axis.

[0032] Example 2

[0033] The difference between this embodiment and Embodiment 1 above is that, Figure 6As shown, this utility model provides a photoelectric tracker with an automatic axis alignment device, including a fast control mirror 12, which is disposed in a load box 11. The load box 11 is rotatably connected to a turntable 10, and a Couder mirror group is disposed in the turntable 10. The fast control mirror 12 is located on the outgoing light path of the Couder mirror group. A beam splitter 13 is disposed on the reflected light path of the fast control mirror 12, with the reflecting surface of the beam splitter 13 facing the reflecting surface of the fast control mirror 12. The laser reflected by the beam splitter 13 is used to enter the emission optical system 7. An optical axis detection mechanism 15 is disposed on the transmission light path of the beam splitter 13, which is used to detect the laser optical axis angle and output an optical axis detection signal. The output terminal of the optical axis detection signal of the optical axis detection mechanism 15 is connected to the input terminal of the fast control mirror 12. A third mirror 14 is disposed on the reflected light path of the beam splitter 13, and the reflected light path of the third mirror 14 is coaxially disposed with the incident light path of the emission optical system 7. A base box 9 is provided at the bottom of the turntable 10, and a laser 1 is installed inside the base box 9. A Couder mirror group is used to reflect the laser emitted by the laser 1. A first Couder mirror 2 is installed inside the base box 9, and the first Couder mirror 2 is used to reflect the laser emitted by the laser 1. The Couder mirror group includes a second Couder mirror 3, a third Couder mirror 4, and a fourth Couder mirror 5 arranged sequentially along the optical path. The second Couder mirror 3 is located on the incident side of the Couder mirror group and is used to reflect the laser reflected by the first Couder mirror 2. The fourth Couder mirror 5 is used to emit the laser reflected by the Couder optical path.

[0034] In this embodiment, the specific process is as follows: An automatic axis alignment device is installed in the load box 11 of the photoelectric tracker. The laser emitted by the laser is guided by the Couder mirror group in the turntable and then emitted to the fast control mirror 12 in the load box. The fast control mirror 12 reflects the emitted light from the Couder mirror group to the beam splitter 13. The beam splitter 13 reflects most of the laser energy into the emission optical system 7 and then emits it. The remaining small portion of the laser energy enters the optical axis detection mechanism 15. The optical axis detection mechanism 15 is fixed in the load box 11, and its optical axis is not affected by changes in the turntable's attitude.

[0035] The laser light entering the optical axis detection mechanism 15 is imaged on the photosensitive surface of the detector 22 after passing through the telephoto optical system. When the laser optical axis is in the theoretical direction, the imaged spot is at the center of the detector 22. When the laser optical axis deviates from the theoretical direction, the imaged spot also deviates. When the optical axis detection mechanism 15 detects that the laser optical axis deviates from the theoretical optical axis by an angle θ, it sends the optical axis detection signal to the fast control mirror 12. Under the control of the internal controller, the fast control mirror 12 rotates in the opposite direction by an angle θ / 2, thereby achieving real-time correction of the emitted laser optical axis and ensuring that the laser emission optical axis is always parallel to the optical axis of the detection optical system 8.

[0036] This invention uses an optical axis detection mechanism 15 to detect the direction of the optical axis after the laser beam deflects through the Couder optical path when the laser 1 is working. When the optical axis is found to be deviated, it can be quickly corrected to ensure the parallelism between the laser optical axis and the detection optical axis.

[0037] At the same time, it can eliminate most of the optical axis deviation caused by turntable deformation, and can appropriately relax the requirements for the orthogonality of the turntable azimuth-pitch axis system and the accuracy of optical axis calibration, thereby reducing the difficulty of equipment installation and adjustment, ensuring the optical axis accuracy of the system, and has high practical value.

[0038] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope defined in the claims.

Claims

1. An automatic axis alignment device for a photoelectric tracker, characterized in that, The system includes a fast-control mirror, which is installed inside a load chamber to receive the emitted light from the Cooder mirror assembly. A beam splitter is installed on the reflected light path of the fast-control mirror, with its reflective surface facing the reflective surface of the fast-control mirror. The laser light reflected by the beam splitter enters the emission optical system. An optical axis detection mechanism is installed on the transmission light path of the beam splitter to detect the laser optical axis angle and output an optical axis detection signal. The output terminal of the optical axis detection signal of the optical axis detection mechanism is connected to the input terminal of the fast-control mirror.

2. The automatic axis alignment device for photoelectric tracking according to claim 1, characterized in that, The optical axis detection mechanism includes a telephoto optical system and a detector. The detector is disposed in the output optical path of the telephoto optical system. The output end of the detector is connected to the input end of the fast control mirror. The telephoto optical system is used to transmit laser light through a beam splitter. The detector is used to image the laser light emitted from the telephoto optical system and detect optical axis deviation before outputting an optical axis detection signal.

3. The automatic axis alignment device for photoelectric tracking according to claim 2, characterized in that, The telephoto optical system includes a primary mirror, a first mirror, a filter, and a second mirror arranged sequentially along the optical path, with the primary mirror located on the incident side of the telephoto optical system.

4. The automatic axis alignment device for photoelectric tracking according to claim 3, characterized in that, The long-focal optical system also includes a first reflecting mirror and a second reflecting mirror in its optical path. The first reflecting mirror and the second reflecting mirror are used to fold the optical path. The first reflecting mirror is located in the optical path between the primary mirror and the first mirror, and the second reflecting mirror is located in the optical path between the second mirror and the detector.

5. A photoelectric tracking device with an automatic axis alignment mechanism, characterized in that, The system includes a fast-control mirror housed within a load chamber rotatably connected to a turntable. A Coudé mirror assembly is housed within the turntable. The fast-control mirror receives the emitted light from the Coudé mirror assembly. A beam splitter is positioned along the reflected light path of the fast-control mirror, with its reflecting surface facing the reflecting surface of the fast-control mirror. The laser light reflected by the beam splitter enters the emission optical system. An optical axis detection mechanism is positioned along the transmission light path of the beam splitter, detecting the laser optical axis angle and outputting an optical axis detection signal. The output terminal of the optical axis detection signal is connected to the input terminal of the fast-control mirror.

6. The photoelectric tracking device with an automatic axis alignment device according to claim 5, characterized in that, A third reflecting mirror is provided on the reflected light path of the beam splitter, and the reflected light path of the third reflecting mirror is coaxially arranged with the incident light path of the emitting optical system.

7. The photoelectric tracking device with an automatic axis alignment device according to claim 5, characterized in that, The turntable is equipped with a base box at its bottom, and a laser is installed inside the base box. The Couder mirror group is used to reflect the laser emitted by the laser.

8. The photoelectric tracker with an automatic axis alignment device according to claim 7, characterized in that, The base box is equipped with a first Couder mirror, which is used to reflect the laser emitted by the laser.

9. The photoelectric tracking device with an automatic axis alignment device according to claim 5, characterized in that, The Couder mirror group includes a second Couder mirror, a third Couder mirror, and a fourth Couder mirror arranged sequentially along the optical path. The second Couder mirror is located on the incident side of the Couder mirror group and is used to reflect the laser light reflected by the first Couder mirror. The fourth Couder mirror is used to emit the laser light reflected by the Couder optical path.

Images