基于模式投影抑制的无波前传感器双变形镜自适应光学系统解耦控制  

Decoupling Control Algorithm Used for Wave Front Sensor‑Free Adaptive Optics System with Dual Deformable Mirrors Based on Mode Project‑Constraint

作　　者：刘文劲 许冰[2,3] 孙文瀚 Liu Wenjin;Xu Bing;Sun Wenhan(Institute of Electronics and Electrical Engineering,Civil Aviation Flight University of China,Guanghan 610308,Sichuan,China;Key Laboratory on Adaptive Optics,Chinese Academy of Sciences,Chengdu 610209,Sichuan,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,Sichuan,China)

机构地区：[1]中国民用航空飞行学院航空电子电气学院,四川广汉610308 [2]中国科学院自适应光学重点实验室,四川成都610209 [3]中国科学院光电技术研究所,四川成都610209

出　　处：《中国激光》2023年第6期98-104,共7页Chinese Journal of Lasers

摘　　要：为实现无波前传感器自适应光学系统中双变形镜的解耦控制,本文提出了一种基于模式投影抑制的双变形镜解耦控制方法,其中:低空间分辨率大行程变形镜使用模式法进行控制,用于低阶像差校正;高空间分辨率变形镜用于校正高阶像差。同时,通过投影抑制法消除高空间分辨率变形镜中的低阶校正分量,进而实现两个变形镜的高效协同工作。理论分析与仿真结果表明,相比传统的无波前传感器自适应光学系统的解耦算法,本文所提解耦控制方法在稳定性、解耦计算的运算量上均有更优异表现,并可实现良好的耦合误差抑制与像差校正效果。所提算法的有效性得到了原理性实验的验证。Results and Discussions A simulation is used to validate the performance of the project-constraint decoupling method for the aberration correction,coupling error elimination,stability,and computation complexity.It can compensate the aberration better than the traditional method to decoupling method for the wave front sensor-free system(Fig.2).Additionally,it can effectively eliminate the decoupling error between the Woofer and the Tweeter(Fig.3),as the aberration is broken down into low order Zernike modes and high order modes before being corrected by the Woofer and Tweeter.During the decoupling operation,it is more stable than the conventional approach,and the advancements have improved its performance in the control process.Finally,the decoupling method suggests in the research has a lower computational complexity than the conventional method(Fig.4).An experimental system was built to evaluate the effectiveness of the method.The experiment demonstrates that the decoupling algorithm can effectively compensate for phase distortions(Fig.6 and Fig.7)and significantly suppress the coupling error between the dual deformable mirrors and decompose the aberration accurately(Fig.8).Objective Dual deformable mirrors are often used to create wave front-sensor-free adaptive optics systems that can be used to correct aberrations with broad strokes and high spatial frequencies.The Woofer,which has big amplitude and is used to correct low order aberrations,and the Tweeter,which has a high spatial resolution and is used to correct high order aberrations,are two examples of dual deformable mirrors.However,without the decoupling process,it is difficult to avoid the coupling error,which would cause the deformable mirrors to generate an opposite surface shape and waste the ability of aberration correction in the dual deformable mirror adaptive optics system.To solve this problem and make the Woofer and Tweeter could work efficiently together;a decoupling method must be developed.Even the decoupling algorithms are the subject of co

关 键 词：自适应光学 双变形镜 解耦控制 投影抑制 

分 类 号：O436[机械工程—光学工程]