Accounting for the Influence of the Corrector Hysteresis on the Dynamic Characteristics of Adaptive Optics Systems

IF 0.5 Q4 PHYSICS, MULTIDISCIPLINARY Optoelectronics Instrumentation and Data Processing Pub Date : 2024-01-12 DOI:10.3103/s8756699023040064
V. P. Lukin
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Abstract

This paper continues the analysis of the dynamic characteristics of adaptive optics systems operating in a turbulent atmosphere, in particular, the influence of such an important factor of an active corrector mirror as its hysteresis. The requirements for the dynamic parameters of the feedback loop of the adaptive system for laser radiation focusing through a turbulent atmosphere are calculated using an analytical approach. The possibilities of using control algorithms in adaptive optics systems based on the description of their operation as a constant delay control system are considered. The corrector mirror model used takes into account the time delay between the time of the signal and the time of its processing. The operation frequency of the adaptive optics system is estimated using an analytical expression relating the maximum achievable correction level in the Strehl parameter with the most important parameters of the system: the accuracy and operation frequency of the wavefront sensor, the size of the optical system aperture, and atmospheric parameters: the Fried parameter and wind speed. Differences between two types of tracking loops are analyzed: open and closed loops in adaptive optics systems.

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解释校正器迟滞对自适应光学系统动态特性的影响
摘要 本文继续分析在湍流大气中运行的自适应光学系统的动态特性,特别是有源校正镜的一个重要因素--迟滞的影响。使用分析方法计算了激光辐射聚焦自适应系统反馈回路动态参数的要求,该系统可通过湍流大气聚焦激光辐射。在将自适应光学系统的运行描述为恒延迟控制系统的基础上,考虑了在自适应光学系统中使用控制算法的可能性。所使用的校正镜模型考虑到了信号时间与信号处理时间之间的时间延迟。自适应光学系统的工作频率是通过一个分析表达式估算出来的,该表达式将斯特雷尔参数中可达到的最大校正水平与系统的最重要参数联系起来:波前传感器的精度和工作频率、光学系统孔径的大小以及大气参数:弗里德参数和风速。分析了自适应光学系统中开环和闭环两种跟踪环路之间的差异。
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来源期刊
CiteScore
1.00
自引率
50.00%
发文量
16
期刊介绍: The scope of Optoelectronics, Instrumentation and Data Processing encompasses, but is not restricted to, the following areas: analysis and synthesis of signals and images; artificial intelligence methods; automated measurement systems; physicotechnical foundations of micro- and optoelectronics; optical information technologies; systems and components; modelling in physicotechnical research; laser physics applications; computer networks and data transmission systems. The journal publishes original papers, reviews, and short communications in order to provide the widest possible coverage of latest research and development in its chosen field.
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