Self-adaptive optical system stable closed-loop control method

A technology of adaptive optics and system stabilization, applied in adaptive control, optics, optical components, etc.

Active Publication Date: 2021-05-11
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0005] The purpose of the invention is to solve the problem of stable closed-loop control of the adaptive optics system under external interference conditions such as stray light, reduce the requirements of the adaptive optics system for the use environment, expand the application field of the adaptive optics, and improve the performance of the adaptive ...

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  • Self-adaptive optical system stable closed-loop control method
  • Self-adaptive optical system stable closed-loop control method
  • Self-adaptive optical system stable closed-loop control method

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] figure 2 Shown is a sub-aperture layout diagram of a real adaptive optics system wavefront detector, the solid line is a large wave gate, and the dotted line is a small wave gate. The wavefront detector uses an 8*8 Hartmann, deformable mirror A 9*9 square arrangement is adopted. According to the characteristics of the beacon light, 48 sub-apertures and 69 drivers are actually used. The sub-aperture size is 24 pixels, and the spot size is 9 pixels. Set the large gate size (B_SUB ) is 24*24 pixels, and the wavelet gate size (S_SUB) is set to 16*16. The maximum correction voltage of the driver is ±5V, the voltage limit range of the correction voltage of the driver is ±4V, and the stray light threshold (PTHR) is set to 10 (that is, when the pixel gray level sum between the large and small wave gates reaches 10% of the small wave gate gray ...

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Abstract

The invention discloses a self-adaptive optical system stable closed-loop control method, which comprises the processes of stray light detection, slope filtering, recovery operation, control operation and the like, and realizes stable closed-loop control under the stray light interference condition through stray light identification, judgment processing and slope filtering processing. According to the self-adaptive optical system stable closed-loop control method, the existing conditions in the adaptive optical system are utilized, no extra equipment needs to be added, the implementation is simple, the adaptability and the stability of the adaptive optical system are improved, and the application field of the adaptive optical system is expanded.

Description

technical field [0001] The invention relates to the technical field of adaptive optics systems, in particular to a stable closed-loop control method for adaptive optics systems. Background technique [0002] Adaptive optics system is a phase-based wavefront correction system, which usually consists of three parts: wavefront detection, wavefront control and wavefront correction. Currently, most adaptive optics systems usually employ a Shack-Hartmann wavefront sensor for wavefront detection. The Hartmann wavefront sensor detects the wavefront distortion in real time, and the signal is processed by the wavefront controller, and the processed control signal is applied to the wavefront corrector to realize the correction of the beam quality. [0003] At present, most adaptive optics systems perform open and closed loop operations by judging the condition of the Hartmann sub-spots by the operator. Zhou Luchun and Chen Zhongfeng proposed an intelligent control method for adaptive...

Claims

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Application Information

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IPC IPC(8): G02B26/06G05B13/02
CPCG02B26/06G05B13/024
Inventor 甘永东梅月沈锋李新阳马瑞浩董道爱缪洪波
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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