中国光学（中英文）2025，Vol.18Issue(1)：29-41,13.DOI:10.37188/CO.2024-0097
基于变周期光栅法的液晶相控阵指向精度研究
Research on pointing accuracy of liquid crystal phase array based on the variable period grating method
摘要
Abstract
Liquid crystal optical phase array(LC OPA)is widely used in lidar,laser communication and laser weapons to scan and control laser beams.In order to optimize the design of LC OPA and high-precision laser beam control,we study the influence of working wavelength,number of pixels,pixel size,and effective grey levels on beam pointing accuracy.Firstly,according to the liquid crystal phase modulation principle,the ef-fective scanning angle and diffraction efficiency of the period grating and the variable period grating meth-ods are simulated and analyzed.Secondly,assuming the phase modulation to be equally divided by the driv-ing voltage,the variation law of the pointing error with the working wavelength,the number of pixels,the pixel size,and the effective grey levels is simulated and analyzed.The multivariable universal formula is also derived.Thirdly,the pointing accuracy of the nonuniform phase modulation is simulated,analyzed,and com-pared with the results of the uniform phase modulation.Finally,the relationship between the effective grey levels and the pointing error is verified by experiments,and the validity of the empirical formula is prelimin-arily confirmed.The research results can provide a theoretical basis for the design of LC OPA.关键词
液晶相控阵列/变周期光栅法/指向误差/离散相位调制Key words
liquid crystal phase array/variable period grating method/pointing error/discrete phase modula-tion分类
数理科学引用本文复制引用
曹宗新,毛红敏,陆焕钧,樊丽娜,曹召良,钱奕龙,刘禹彤,李坤,李子凡,龚君豪,胡五生,张大伟,洪瑞金..基于变周期光栅法的液晶相控阵指向精度研究[J].中国光学（中英文）,2025,18(1):29-41,13.基金项目
"十四五"江苏省重点学科资助项目(No.2021135) （No.2021135）
国家自然科学基金青年科学基金项目(No.22205155) （No.22205155）
江苏省自然科学基金青年基金项目(No.BK20220640) （No.BK20220640）
江苏省高校基础科学(自然科学)研究面上项目(No.22KJB150011)Supported by Jiangsu Key Disciplines of the Fourteenth Five-Year Plan(No.2021135) （自然科学）
the National Natural Science Foundation of China(No.22205155) （No.22205155）
the Natural Science Foundation of Jiangsu Province(No.BK20220640) （No.BK20220640）
the Natural Science Research of Jiangsu Higher Education Institutions of China(No.22KJB150011) （No.22KJB150011）
