摘要
提供了一种简单且精度较好的测量液晶空间光调制器相位调制特性的方法,即相位与电压(灰度)之间的关系。采用数字波面移相干涉仪,由干涉仪直接给出不同灰度对应的相位差,从而得到液晶空间光调制器的相位调制曲线。利用液晶空间光调制器实现了波前校正。由干涉仪作波前测试,对待校正的畸变波前进行泽尼克多项式描述,根据液晶空间光调制器的相位与灰度的关系,产生相应的灰度图,获得畸变波前的共轭波前,从而完成静态波前的校正,使相关参数如PV值、RMS值和Strehl比值得到了改善。
A simple and better precision method to measure the phase modulation characteristics of liquid crystal spatial light modulator, namely, the relation between phase and gray value, is proposed. Using the digital wave front phase-shifting interferometer, the phase difference from different gray values can be directly obtained from the interferometer, so it is easy to get the phase modulating character of liquid crystal spatial light modulator. The wavefront correction is realized by using the liquid crystal spatial light modulator. The distorted wavefront can be tested and be expressed by Zernike polynomial in the interferometer, using the phase modulation character of liquid crystal spatial light modulator, the corresponding gray picture can be set up. The conjugate wavefront can be obtained, and thus the correcting of the static distorted wavefront is completed and proved by the improvement of the correlative parameters such as PV value, RMS value, strehl ratio.
出处
《光学技术》
EI
CAS
CSCD
北大核心
2005年第2期196-199,201,共5页
Optical Technique
关键词
液晶空间光调制器
相位调制
泽尼克多项式
静态波前校正
liquid crystal spatial light modulator
phase modulation
Zernike polynomial
correcting of the static wavefront
