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Closed-loop feedback system evaluation method and device based on echo speckles and optical equipment

A technology of closed-loop feedback and system evaluation, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as low accuracy of atmospheric scintillation effects, failure of closed-loop feedback evaluation factors, etc.

Pending Publication Date: 2020-06-23
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The present invention provides a closed-loop feedback system evaluation method and device based on echo speckle, which is used to overcome the problem in the prior art that in the long-distance closed-loop beam control system, due to the existence of atmospheric turbulence disturbance, the extended target is in the closed-loop feedback system. Due to the low accuracy of the feedback evaluation factor due to the atmospheric scintillation effect, and even the failure of the closed-loop feedback evaluation factor of the extended target, that is, the problem that the value change of the closed-loop feedback evaluation factor cannot establish a definite relationship with the extended target, and realize the correction of atmospheric turbulence in the closed-loop feedback system the goal of

Method used

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  • Closed-loop feedback system evaluation method and device based on echo speckles and optical equipment
  • Closed-loop feedback system evaluation method and device based on echo speckles and optical equipment
  • Closed-loop feedback system evaluation method and device based on echo speckles and optical equipment

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Embodiment 1

[0073] Please refer to figure 1 , the present invention provides a method for evaluating a closed-loop feedback system based on echo speckle, and the specific steps include:

[0074] Step S1: By sampling the wave speckle of the extended target, firstly, multiple single-point detectors 4 can be used to sample the echo speckle of the extended target, and the statistical characteristics of the echo speckle can be used to obtain a higher The far-field spot closed-loop feedback accuracy can significantly improve the system bandwidth; the echo speckle of the extended target contains the spot scale information, which can overcome the failure of the extended target in the PIB feedback factor; finally, the influence of atmospheric turbulence on the echo speckle The impact of statistical characteristics is much smaller than that of PIB factors, so better system stability and convergence characteristics can be obtained;

[0075]Step S2: Optimizing the echo speckle feedback factor throug...

Embodiment 2

[0116] Embodiment 2, on the basis of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the fuzzy algorithm control module 6 can adopt the hill climbing method.

Embodiment 3

[0117] Embodiment 3, on the basis of Embodiment 1, the difference between this embodiment and Embodiment 1 is that the fast mirror that controls the tilt of the emitting unit can be replaced by piezoelectric ceramics to control the lateral position of the emitting end face of the optical fiber on the focal plane of the emitting lens accomplish.

[0118] like Figure 7 As shown, the present invention also provides an optical device, including: an objective optical system for detecting the target; an adaptive optical system, such as a closed-loop feedback system based on echo speckle, the adaptive optical system is used in the objective optical system In the process of system imaging, based on the echo speckle-based closed-loop feedback system evaluation device described in the above-mentioned embodiment, the steps of the echo-speckle-based closed-loop feedback system evaluation method described in the above-mentioned embodiment are realized; the optical equipment also includes ...

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Abstract

The invention discloses a closed-loop feedback system evaluation method and device based on echo speckles and optical equipment. The closed-loop feedback system evaluation method based on echo speckles comprises the following steps: sampling echo speckles of an extended target; optimizing an echo speckle feedback factor through a fuzzy optimization algorithm, and controlling a phase item and an inclination item of a transmitting system; and establishing monotonous relationship between speckle statistical characteristics and sizes of focused light spots. According to the scheme, the problem that a traditional feedback method based on echo PIB energy cannot achieve closed-loop correction of an extended target is solved, the stability and convergence of a correction system are achieved, and ahigh closed-loop correction bandwidth can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of laser beam control, in particular to an evaluation method, device and optical equipment for a closed-loop feedback system based on echo speckle. Background technique [0002] Adaptive optics technology is widely used in laser beam transmission control. Traditional adaptive optics needs to detect the phase distribution of the echo light field and pre-compensate the aberration caused by atmospheric turbulence through the principle of phase conjugation. However, the optical structure of this type of system is complex. The application threshold is high, and when the echo light flicker caused by strong turbulence is strong, the error of phase sensing is large, and it is not suitable for most high-energy laser beam control applications. Adaptive optical systems without wavefront detection are used as laser beam control technology The new development direction, through the method of optimization algorithm, real-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/02
CPCG05B13/024
Inventor 李远洋刘立生王挺峰姜振华孙涛于湛宋纪坤
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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