液晶波前校正器校正水平方向上的大气湍流  

Correction of Turbulence in Horizontal Direction Using a Liquid Crystal Wave-Front Corrector

作　　者：姜宝光[1,2] 穆全全[1,2] 曹召良[1] 李超[1,2] 夏明亮[1,2] 宣丽[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春130033 [2]中国科学院研究生院,北京100039

出　　处：《液晶与显示》2009年第3期396-398,共3页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.60578035,No.50473040,No.60736042);吉林省科学基金(No.20050520,No.20050321-2)

摘　　要：利用液晶波前校正器和哈特曼波前传感器组成的自适应光学系统对水平方向500 m的大气湍流进行校正。首先测定了液晶波前校正器(LCWFC)的位相调制特性,测定结果表明其可以实现一个波长的调制量,同时利用Gamma校正实现了位相和灰度之间的线性调制关系。然后将该系统与孔径220 mm的望远镜进行对接。液晶自适应校正后,波面均方根误差降低到0.06λ,实现了0.68″'的系统衍射极限分辨。实验结果表明:液晶波前校正器可以很好地校正水平方向500 m的大气湍流扰动。An adaptive optics system integrated with a LCWFC and a Shack-Hartmann wave-front sensor （WFS） were used to correct the turbulence in horizontal direction. Firstly, the phase modulation characteristic of the wave-front corrector was measured. The result showed that it can reach the modulation of 1 wave length. Meanwhile, the linear curve between phase modulation and voltage was gained by Gamma correction. At last, this system was combined with a 220 mm diameter telescope. After correction, the wavefront error was reduced to 0.06k and the diffractive limits 0.68＂ was also reached. The result shows that this system can corrected the turbulence effectively.

关 键 词：液晶波前校正器 大气湍流 位相调制 

分 类 号：O753.2[理学—晶体学] TH74[机械工程—光学工程]