High Closed Loop Correction Accuracy with a Liquid Crystal Wavefront Corrector  

作　　者：曹召良 穆全全 胡立发 刘永刚 彭增辉 宣丽 

机构地区：[1]State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 [2]Graduate School of the Chinese Academy of Sciences, Beijing 100039

出　　处：《Chinese Physics Letters》2008年第3期989-992,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 60578035 and 50473040, and the Science Foundation of Jilin Province under Grant Nos 20050520 and 20050321-2.

摘　　要：We investigate the accurate control of a liquid crystal wavefront corrector. First, the Gamma correction technique is adopted to amend the nonlinear phase modulation. Then, the control method and wavefront reconstruction are considered. Lastly, a closed loop correction experiment is carried out and a high correction accuracy is obtained with peak to valley （PV） of 0.08λ （λ = 632.8 nm）, the wavefront phase rms 0.015λ, as well as the Strehl ratio of 0.99. The diffraction-limited resolution is achieved.We investigate the accurate control of a liquid crystal wavefront corrector. First, the Gamma correction technique is adopted to amend the nonlinear phase modulation. Then, the control method and wavefront reconstruction are considered. Lastly, a closed loop correction experiment is carried out and a high correction accuracy is obtained with peak to valley （PV） of 0.08λ （λ = 632.8 nm）, the wavefront phase rms 0.015λ, as well as the Strehl ratio of 0.99. The diffraction-limited resolution is achieved.

关 键 词：supernova explosion proto-neutron star shock wave 

分 类 号：O7[理学—晶体学]