液晶空间光调制器的相位调制模式对干涉条纹图像的影响  

The Effect of Phase Modulation Mode of the Liquid Crystal Spatial Light Modulator on the Interference Fringe Image

作　　者：钟德俊 Zhong Dejun(College of Science,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学理学院,上海201620

出　　处：《应用激光》2024年第11期198-204,共7页Applied Laser

摘　　要：相位调制模式作为液晶空间光调制器的一个关键参量,是影响干涉测量过程中图像质量的重要因素。基于液晶空间光调制器的器件结构及调制精度,分析了器件单个调制单位误差所导致的相位调制模式失配对干涉条纹图像的影响,进而搭建了相应实验系统。结果表明,当相位调制模式设置不合理时,受制于液晶空间光调制器的调制精度及器件结构,模式误差可能导致干涉条纹图像内各像元的相移分布不再满足预设的精度要求,因而严重影响干涉成像质量。The phase modulation mode is a critical parameter of the liquid crystal spatial light modulator,with significant influence on the interferometric image quality.In this study,we analyze the impact of mode-mismatch,caused by phase modulation errors in a single modulation cycle,on the interference fringe image quality,based on the modulation accuracy and device structure of the liquid crystal spatial light modulator.Our results demonstrate that improper phase modulation modes,in conjunction with limited modulation accuracy and device structure,can lead to phase shift distribution deviations in the interference fringe image that fail to meet the prescribed accuracy requirements,thus severely compromising image quality.

关 键 词：液晶空间光调制器 模式误差 干涉测量 干涉条纹图像 

分 类 号：TN761[电子电信—电路与系统] TP391.41[自动化与计算机技术—计算机应用技术]