Compound axis tracking system based on rotary biprism

A tracking system and double prism technology, applied in the direction of control using feedback, can solve the problems of difficult to achieve micro-radian level, difficult to achieve micro-radian, complex control system, etc., achieve no tracking blind area, fast and high-precision tracking , the effect of low moment of inertia

Active Publication Date: 2014-10-29
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

When the rotating double prism device tracks a target within a large angle range, its tracking accuracy is limited by the accuracy of the position sensor, etc., and its accuracy is often at the milliradian level, and it is difficult to reach the microradian or even submicroradian level
[0004] At present, there are three rotating prisms used in the literature to solve the problem of tracking blind spots, but there are infinitely many solutions for the rotation angle of each prism in the three-prism tracking device, the control system is very complicated, and the tracking accuracy is also very limited. The tracking accuracy is about 0.1 milliradians. Difficult to reach the microradiance level

Method used

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  • Compound axis tracking system based on rotary biprism
  • Compound axis tracking system based on rotary biprism
  • Compound axis tracking system based on rotary biprism

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] combine first figure 2 A compound axis tracking system based on a rotating double prism is introduced. The main components that make up the system are prism 1, prism 2, motor 3, motor 4, imaging group 5, fast mirror tracking device 6, detector 7, and controller 8.

[0032] Among them, prism 1 and prism 2 are the same, both are achromatic prisms (can work in visible light, medium-wave and long-wave infrared bands), and the light deflection angle range of the combination of prism 1 and prism 2 is about ±10°~±80°, which The blind zone is about ±0.1°~±1.0°.

[0033] Motor 3 and motor 4 are torque motors, and their rotors are directly connected to the first prism and the second prism respectively, and can rotate cont...

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Abstract

The invention provides a compound axis tracking system based on a rotary biprism. The system can be used for tracking a fast-moving target with high precision. The device comprises a rotary biprism tracking control device, an imaging assembly, a fast reflecting mirror tracking device and a detector. According to the system, the rotary biprism is controlled to quickly track the moving target, namely, the target enters the image assembly and then is imaged to the detector, a fast reflecting mirror is controlled to deflect according to the miss distance of the target on the detector in order to stably close the target in a detection center, and as a result, high-precision tracking of the fast-moving target can be realized.

Description

technical field [0001] The invention belongs to the field of photoelectric tracking, and relates to a photoelectric tracking device and a control method, in particular to a compound axis tracking system based on a rotating double prism. Background technique [0002] The rotating double prism structure is not only suitable for scanning the laser beam, but also can be used for fast target tracking. The rotating double prism structure (Risley prism) achieves the purpose of controlling the beam deflection by rotating two coaxial wedge prisms. It has the characteristics of compact structure, low moment of inertia and rapid response. In existing patents (see patents of Yun Maojin, Zu Jifeng, etc.: CN1256609C and patent: CN2655268), it is proposed to use this structure for beam scanning, and the scanning device and scanning algorithm based on the rotating double prism have been studied. Du Junfeng et al. The fast mirror patent (CN101482643B) provides a device for fast tracking of ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12
Inventor 彭起李锦英王中科任戈陈科付承毓
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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