Laser communication ATP system

Abstract

The utility model provides a laser communication ATP (Automatic Train Protection) system, which comprises a telescope assembly, a T-shaped two-dimensional turntable and a rear light path assembly, the T-shaped two-dimensional rotary table comprises a pitch axis system and an azimuth axis system, the pitch axis system is installed on the azimuth axis system based on the radial normal plane of the pitch axis system, and one vertical end face of the pitch axis system is connected with the telescope assembly. The rear light path assembly is used for processing laser in the laser communication ATP system, and the laser receiving face of the rear light path assembly is connected with the other vertical end face of the pitch axis system. According to the utility model, the telescope assembly and the rear light path assembly are directly arranged at the two ends of the pitch axis system of the T-shaped two-dimensional turntable, so that incident light can directly enter the rear light path assembly from the telescope assembly through the pitch axis system, the transmission path of light beams is simplified, the miniaturization and light weight of the structure of the laser communication ATP system are realized, and the cost is reduced. The installation and adjustment work is simpler and more convenient, the vibration adaptability is higher when a rocket is launched, and the capturing and tracking performance after orbit injection is more reliable.

Description

Technical Field

[0001] The utility model relates to the field of laser communication, and particularly relates to a laser communication ATP system. Background Art

[0002] Generally, the distance of inter-satellite laser communication ranges from hundreds of kilometers to tens of thousands of kilometers. The laser communication ATP system is one of the important component devices relied on by satellites during inter-satellite and satellite-ground laser communication. The general functional requirements for the laser communication ATP system are to have functions such as acquisition, tracking, and pointing (i.e., Acquisition, Tracking, and Pointing, ATP).

[0003] The current laser communication ATP system mainly includes: a telescope, a two-dimensional turntable, a Coudé mirror, and a rear optical path component. The optical path of this laser communication ATP system is as Figure 1 shown. The communication beam is received and emitted by the telescope. The beam received by the telescope generally passes through the Coudé optical path through the inside of the pitch axis and azimuth axis of the two-dimensional turntable and enters the rear optical path component. The existence of the Coudé optical path makes the beam experience multiple reflections during transmission, and the optical path is also longer, resulting in higher requirements for the coaxiality, light passing aperture, and beam quality of the beam; at the same time, the Coudé optical path needs to be connected by multiple Coudé mirrors, which also brings many difficulties to the miniaturization, lightweight, and alignment work of the mechanism. Summary of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides a laser communication ATP system, which can simplify the transmission path of the incident light, realize the miniaturization and lightweight of the structure of the laser communication ATP system, make the alignment work more convenient, be more adaptable to the vibration during rocket launch, and have more reliable capture, tracking, and aiming performance after entering the orbit.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A laser communication ATP system includes: a telescope assembly for receiving and transmitting laser; a T-shaped two-dimensional turntable including a pitch axis system and an azimuth axis system. The pitch axis system is mounted on the azimuth axis system based on the radial normal plane of the pitch axis system, and one vertical end face of the pitch axis system is connected to the telescope assembly; a rear optical path component for processing the laser in the laser communication ATP system, and the laser receiving surface of the rear optical path component is connected to the other vertical end face of the pitch axis system, so that the incident light entering the laser communication ATP system from the telescope assembly directly enters the rear optical path component through the pitch axis system.

[0007] In addition, the laser communication ATP system proposed by the utility model above may also have the following additional technical features:

[0008] According to an embodiment of the present utility model, the pitch axis system includes: a hollow pitch rotating shaft, which is installed inside a pitch mounting seat through pitch bearings. One end of the pitch rotating shaft faces the telescope assembly, and the other end of the pitch rotating shaft faces the rear optical path assembly, so that the incident light entering the laser communication ATP system from the telescope assembly directly enters the rear optical path assembly through the pitch rotating shaft; a pitch motor, which is used to drive the pitch rotating shaft to rotate.

[0009] According to an embodiment of the present utility model, a rear optical path lens is provided on the laser receiving surface of the rear optical path assembly, and the diameter of the vertical end surface of the pitch rotating shaft connected to the laser receiving surface is larger than the light passing aperture of the rear optical path lens.

[0010] Preferably, the rear optical path lens is an HWP lens.

[0011] According to an embodiment of the present utility model, the telescope assembly includes a primary mirror, a secondary mirror, and a reflector disposed in a telescope mounting seat. The telescope assembly is connected to the pitch axis system through the telescope mounting seat. The reflector is disposed directly below the secondary mirror, and the primary mirror is disposed below the right of the secondary mirror. The primary mirror reflecting surface of the primary mirror corresponds to the secondary mirror reflecting surface of the secondary mirror, so that after the incident light is reflected by the primary mirror reflecting surface, it passes through the secondary mirror reflecting surface and the reflector in sequence, and then enters the pitch axis system.

[0012] According to an embodiment of the present utility model, the telescope assembly further includes a primary mirror mounting seat, a secondary mirror mounting seat, and a reflector mounting seat. The primary mirror mounting seat is used to fix the primary mirror, the secondary mirror mounting seat is used to fix the secondary mirror, and the reflector mounting seat is used to fix the reflector.

[0013] According to an embodiment of the present utility model, the telescope assembly is rotatably connected to the pitch axis system. An arc-shaped groove is further provided on the vertical end surface of the pitch axis system connected to the telescope assembly. A pitch limit block is fixedly provided on the telescope assembly. When the telescope assembly rotates, the protrusion of the pitch limit block moves in the arc-shaped groove to achieve circumferential limitation.

[0014] Advantages of the present utility model:

[0015] The laser communication ATP system of the present utility model directly sets the telescope assembly and the rear optical path assembly at both ends of the pitching axis system of the T-shaped two-dimensional turntable, without the need to set up a Coudé mirror to connect the Coudé optical path. The incident light can directly enter the rear optical path assembly from the telescope assembly through the pitching axis system, simplifying the transmission path of the light beam from the telescope assembly to the rear optical path assembly, realizing the miniaturization and light weight of the structure of the laser communication ATP system, and making the alignment work more convenient; moreover, there is no need to consider the change of the optical path caused by the vibration of the Coudé mirror. The laser communication ATP system has stronger vibration adaptability during rocket launch, and the acquisition and tracking performance of the laser communication ATP system after entering orbit is more reliable. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the optical path transmission of the existing laser communication ATP system;

[0017] Figure 2 It is a schematic diagram of the structure of the laser communication ATP system according to an embodiment of the present utility model;

[0018] Figure 3 For Figure 2 The sectional view of the laser communication ATP system shown;

[0019] Figure 4 For Figure 2 The exploded view of the laser communication ATP system (omitting the azimuth axis system) shown.

[0020] Reference Signs:

[0021] 10 - Telescope assembly, 11 - Telescope mounting base, 12 - Primary mirror, 13 - Secondary mirror, 14 - Reflecting mirror, 15 - Primary mirror mounting base, 16 - Secondary mirror mounting base, 17 - Reflecting mirror mounting base, 18 - Pitching limit block, 20 - T-shaped two-dimensional turntable, 21 - Pitching axis system, 211 - Pitching mounting base, 212 - Pitching bearing, 213 - Pitching rotating shaft, 214 - Pitching motor, 215 - Arc-shaped groove, 22 - Azimuth axis system, 30 - Rear optical path assembly, 31 - Rear optical path lens. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] As Figure 2 And 3As shown in the figure, the laser communication ATP system of the embodiment of the present utility model includes: a telescope assembly 10, a T-shaped two-dimensional turntable 20, and a rear optical path assembly 30. Among them, the telescope assembly 10 is used for transmitting and receiving laser light; the T-shaped two-dimensional turntable 20 includes a pitch axis system 21 and a azimuth axis system 22. The pitch axis system 21 is mounted on the azimuth axis system 22 based on the radial normal plane of the pitch axis system 21. One vertical end face of the pitch axis system 21 is connected to the telescope assembly 10; the rear optical path assembly 30 is used for processing the laser light in the laser communication ATP system, such as splitting and calibrating the light beam, etc. The laser receiving surface of the rear optical path assembly 30 is connected to the other vertical end face of the pitch axis system 21, so that the incident light entering the laser communication ATP system from the telescope assembly 10 directly enters the rear optical path assembly 30 through the pitch axis system 21. Among them, the pitch axis system 21 is used to drive the telescope assembly 10 and the rear optical path assembly 30 to perform pitch movement in the vertical direction, and the azimuth axis system 22 is used to drive the pitch axis system to perform azimuth movement in the horizontal direction.

[0024] In the laser communication ATP system of this embodiment, by directly arranging the telescope assembly 10 and the rear optical path assembly 30 at both ends of the pitch axis system 21 of the T-shaped two-dimensional turntable 20, there is no need to set up a Coudé mirror to connect the Coudé optical path. The incident light can directly enter the rear optical path assembly 30 from the telescope assembly 10 through the pitch axis system 21, simplifying the transmission path of the light beam from the telescope assembly 10 to the rear optical path assembly 30, realizing the miniaturization and light weight of the structure of the laser communication ATP system, and making the alignment work more convenient; moreover, there is no need to consider the change of the optical path caused by the vibration of the Coudé mirror. The laser communication ATP system has stronger adaptability to the vibration during rocket launch, and the capture and tracking performance of the laser communication ATP system after entering the orbit is more reliable.

[0025] As Figure 3 shown, in an embodiment of the present utility model, the pitch axis system 21 may include: a pitch mounting seat 211, a pitch bearing 212, a hollow pitch rotating shaft 213, and a pitch motor 214. Among them, the pitch rotating shaft 213 is mounted inside the pitch mounting seat 211 through the pitch bearing 212. One end of the pitch rotating shaft 213 faces the telescope assembly 10, and the other end of the pitch rotating shaft 213 faces the rear optical path assembly 30, so that the incident light entering the laser communication ATP system from the telescope assembly 10 directly enters the rear optical path assembly 30 through the pitch rotating shaft 213; the pitch motor 214 is used to drive the pitch rotating shaft 213 to rotate. Since the pitch rotating shaft 213 is hollow, the through-axis optical path entering the pitch rotating shaft 213 from the telescope assembly 10 can directly enter the rear optical path assembly 30 without redundant reflection, improving the reliability of the capture and tracking performance of the laser communication ATP system; by setting the pitch bearing 212, the rotation stability of the pitch rotating shaft 213 can be improved.

[0026] In an embodiment of the present utility model, the rear optical path assembly 30 can be fixedly connected to the pitching bearing 212. When the pitching rotating shaft 213 rotates, it drives the rear optical path assembly 30 to rotate synchronously.

[0027] As Figure 3 shown, in an embodiment of the present utility model, a rear optical path lens 31 can be provided on the laser receiving surface of the rear optical path assembly 30. The diameter of the vertical end surface of the pitching rotating shaft 213 connected to the laser receiving surface is greater than the light passing aperture of the rear optical path lens 31.

[0028] Preferably, the rear optical path lens 31 can be an HWP (Half Wave Plate) lens, which is used to adjust or control the polarization state of the light beam to meet the optical requirements of the rear optical path assembly. In other specific embodiments, the type of the rear optical path lens 31 can be replaced according to user needs, such as a quarter-wave plate, etc. This embodiment is not limited thereto.

[0029] In an embodiment of the present utility model, the telescope assembly 10 is rotatably connected to the pitching axis system 21. An arc-shaped groove 215 is further provided on the vertical end surface of the pitching axis system 21 connected to the telescope assembly 10. A pitching limit block 18 is fixedly provided on the telescope assembly 10. When the telescope assembly 10 rotates, the protrusion of the pitching limit block 18 moves in the arc-shaped groove 215 to achieve circumferential limitation (as Figure 4 shown), so as to limit the rotation angle of the telescope assembly 21.

[0030] As Figure 3 shown, in an embodiment of the present utility model, the telescope assembly 10 can include a primary mirror 12, a secondary mirror 13, and a reflector 14 disposed in a telescope mounting base 11. The telescope assembly 10 is connected to the pitching axis system 21 through the telescope mounting base 11. The reflector 14 is disposed directly below the secondary mirror 13, and the primary mirror 12 is disposed at the lower right of the secondary mirror 13. The primary mirror reflecting surface of the primary mirror 12 corresponds to the secondary mirror reflecting surface of the secondary mirror 13, so that after the incident light is reflected by the primary mirror reflecting surface, it passes through the secondary mirror reflecting surface and the reflector in sequence, and then enters the pitching axis system 21.

[0031] In an embodiment of the present utility model, the primary mirror 12 and the secondary mirror 13 can be mirror structures with a reflecting function. The telescope assembly 10 forms a reflective telescope by arranging the primary mirror 12, the secondary mirror 13, and the reflector 14 to transmit the incident light.

[0032] In an embodiment of the present utility model, the telescope assembly 10 can further include a primary mirror mounting base 15, a secondary mirror mounting base 16, and a reflector mounting base 17. The primary mirror mounting base 15 is used to fix the primary mirror 12, the secondary mirror mounting base 16 is used to fix the secondary mirror 13, and the reflector mounting base 17 is used to fix the reflector 14.

[0033] According to the laser communication ATP system of the present utility model, by directly arranging the telescope assembly and the rear optical path assembly at both ends of the pitch axis system of the T-shaped two-dimensional turntable, there is no need to set up a Coudé mirror to connect the Coudé optical path. The incident light can directly enter the rear optical path assembly from the telescope assembly through the pitch axis system, simplifying the transmission path of the light beam from the telescope assembly to the rear optical path assembly, realizing the miniaturization and light weight of the structure of the laser communication ATP system, and making the alignment work more convenient. Moreover, there is no need to consider the change of the optical path caused by the vibration of the Coudé mirror. The laser communication ATP system has stronger vibration adaptability during rocket launch, and the acquisition and tracking performance of the laser communication ATP system after entering orbit is more reliable.

[0034] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0037] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0038] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A laser communication ATP system, characterized in that: include: A telescope assembly, the telescope assembly being used for transmitting and receiving lasers; A T-shaped two-dimensional turntable, the T-shaped two-dimensional turntable comprising a pitch axis system and an azimuth axis system, the pitch axis system being mounted on the azimuth axis system based on a radial normal plane of the pitch axis system, and a vertical end face of the pitch axis system being connected to the telescope assembly; A rear optical path component is used to process the laser in the laser communication ATP system. The laser receiving surface of the rear optical path component is connected to the other vertical end surface of the pitch axis system, so that the incident light entering the laser communication ATP system from the telescope assembly directly enters the rear optical path component through the pitch axis system.

2. The laser communication ATP system according to claim 1, characterized in that: The pitch axis system comprises: A hollow pitch shaft, wherein the pitch shaft is mounted inside the pitch mounting seat through a pitch bearing, one end of the pitch shaft faces the telescope assembly, and the other end of the pitch shaft faces the rear optical path assembly, so that incident light entering the laser communication ATP system from the telescope assembly directly enters the rear optical path assembly through the pitch shaft; A pitch motor is used to drive the pitch shaft to rotate.

3. The laser communication ATP system according to claim 2, characterized in that: The laser receiving surface of the rear optical path component is provided with a rear optical path lens, and the diameter of the vertical end surface where the pitch axis is connected to the laser receiving surface is larger than the light aperture of the rear optical path lens.

4. The laser communication ATP system according to claim 3, characterized in that: The rear light path lens is a HWP lens.

5. The laser communication ATP system according to claim 1, characterized in that: The telescope assembly includes a primary mirror, a secondary mirror and a reflector which are arranged in a telescope mounting seat. The telescope assembly is connected to the pitch axis system through the telescope mounting seat. The reflector is arranged directly below the secondary mirror. The primary mirror is arranged to the lower right of the secondary mirror. The primary mirror reflective surface of the primary mirror corresponds to the secondary mirror reflective surface of the secondary mirror, so that the incident light is reflected by the primary mirror reflective surface, and then passes through the secondary mirror reflective surface and the reflector in sequence before entering the pitch axis system.

6. The laser communication ATP system according to claim 5, characterized in that: The telescope assembly also includes a primary mirror mounting seat, a secondary mirror mounting seat and a reflector mounting seat, wherein the primary mirror mounting seat is used to fix the primary mirror, the secondary mirror mounting seat is used to fix the secondary mirror, and the reflector mounting seat is used to fix the reflector.

7. The laser communication ATP system according to claim 1, characterized in that: The telescope assembly is rotationally connected to the pitch axis system, and an arc-shaped groove is also provided on the vertical end surface where the pitch axis system is connected to the telescope assembly. A pitch limit block is fixedly provided on the telescope assembly, and when the telescope assembly rotates, the protrusion of the pitch limit block moves in the arc-shaped groove to achieve circumferential limitation.

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