液晶光栅光场逆衍射计算研究  

Study on Inverse Diffraction Propagation Calculation of Liquid Crystal Grating Light Field

作　　者：张婷[1] 郑春艳[1,2] 徐大海[1,2] 程庆华[1,2] 

机构地区：[1]长江大学物理与光电工程学院,湖北荆州434023 [2]长江大学物理与信息技术研究中心,湖北荆州434023

出　　处：《长江大学学报（自科版）（上旬）》2015年第10期10-15,3,共6页JOURNAL OF YANGTZE UNIVERSITY (NATURAL SCIENCE EDITION) SCI ＆ ENG

基　　金：国家自然科学基金项目(61308104);湖北省高等学校优秀中青年科技创新团队计划项目(201204)

摘　　要：液晶光栅加电后形成的相位轮廓是二元台阶形状。为测试液晶光栅的相位轮廓以保证液晶光栅的工作性能,采用闪耀级次(+1级)的近场衍射光场逆衍射计算方法并运用Matlab仿真来反演出液晶光栅的相位轮廓,提出了基于菲涅尔逆衍射的反演液晶光栅相位轮廓方法。衍射光场逆衍射反演得到的相位轮廓与模拟实际应用中的二元光栅相位轮廓的差值均方差精度验证了液晶光栅衍射光场逆衍射计算方法切实可行、准确。该方法不仅可以用来测试液晶光栅的相位轮廓,在液晶光栅工作性能下降时,也可作为分析、调试液晶光栅相位轮廓的一个非常有用的工具。Phase contour of the liquid crystal grating formed after adding electricity is binary step shape.In order to test the liquid crystal grating phase contour to ensure the performance of liquid crystal grating,the liquid crystal grating phase contour is reversed by using the＋1level diffraction light and matlab simulation.And the method of inversion liquid crystal grating phase contour based on inverse Fresnel diffraction is presented.The mean square of a difference between phase contour inverted by diffraction light field and binary grating phase contour in the practical application shows that the method of using diffraction light field to invert the phase contour of liquid crystal grating is feasible and accurate.This method can not only be used to test the phase contour of liquid crystal grating,but also a very useful tool for analyzing and debugging the phase contour of liquid crystal grating when its performance declines.

关 键 词：液晶光栅 衍射光场 相位轮廓 逆衍射 

分 类 号：O436.1[机械工程—光学工程]