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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Performance simulation of an adaptive optics system with liquid crystal corrector under closed-loop and open-loop control
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Performance simulation of an adaptive optics system with liquid crystal corrector under closed-loop and open-loop control

机译：闭环和开环控制下带有液晶校正器的自适应光学系统的性能仿真

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摘要

The adaptive optics system (AOS) often operates in a discrete sampling process with finite closed-loop frequency. Reconstruction, detection, and time lag induced errors are the main correction errors of the system. An AOS that is based on a liquid crystal (LC) benefits from the LC's high correction precision, thus the reconstruction error can be ignored. The primary error will be induced by the time lag from the time of detection to the time of compensation. In this paper, some theoretical simulations are introduced in order to evaluate the correction precision of AOS with an LC corrector. The main purpose is to compare the correction precision between the open-loop and closed-loop control. We attempt to find a method to ascertain the exact precision of the open-loop control and show whether it improves the correction precision. The conclusion is thus reached that the actual error rejection bandwidth for the closed-loop was lower than the -3 dB error rejection bandwidth measured in practice. The increased refresh frequency of the open-loop control can improve the imaging performance to nearly -3 dB bandwidth of the detector measured, which is the maximum possible bandwidth due to the time lag.
机译：自适应光学系统（AOS）通常在具有有限闭环频率的离散采样过程中运行。重建，检测和时滞引起的错误是系统的主要校正错误。基于液晶（LC）的AOS得益于LC的高校正精度，因此可以忽略重建误差。从检测时间到补偿时间之间的时间差会引起主要误差。本文介绍了一些理论模拟，以评估LC校正器对AOS的校正精度。主要目的是比较开环和闭环控制之间的校正精度。我们试图找到一种方法来确定开环控制的精确度，并表明它是否可以提高校正精度。因此得出的结论是，闭环的实际误码抑制带宽低于实际测量的-3 dB误码抑制带宽。开环控制的增加的刷新频率可以将成像性能提高到所测检测器的近-3 dB带宽，这是由于时间延迟而导致的最大可能带宽。

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