基于液晶偏振光栅的纳米位移测量实验  

Measuring nanometer-scale displacement based on liquid crystal polarization grating

作　　者：朱梓雯 图英楠 左一冉 司一童 张皓祎 章恩韬 刘通 ZHU Ziwen;TU Yingnan;ZUO Yiran;SI Yitong;ZHANG Haoyi;ZHANG Entao;LIU Tong(School of Aerospace Information,Space Engineering University,Beijing 101400,China;Department of Aerospace Science and Technology,Space Engineering University,Beijing 101400,China)

机构地区：[1]航天工程大学航天信息学院,北京101400 [2]航天工程大学宇航科学与技术系,北京101400

出　　处：《物理实验》2023年第7期56-61,共6页Physics Experimentation

摘　　要：利用光的偏振特性设计了基于液晶偏振光栅的纳米位移测量实验方案.利用液晶偏振光栅的特性,将两平行放置偏振光栅的横向相对位移转换为入射线偏振光的偏振方向旋转,通过马吕斯定律得到偏振方向转角,计算出的微小位移达到nm量级.A nanometer-scale displacement experimental scheme was designed,which utilized the characteristics of liquid crystal polarization gratings to convert the lateral relative displacement of two parallel polarization gratings into the polarization direction rotation of the incoming polarized light.The polarization direction rotation angle was obtained through Marius law,and finally the micro-displacement at the nanometer level was calculated.

关 键 词：微小位移 偏振 液晶偏振光栅 马吕斯定律 

分 类 号：O436.3[机械工程—光学工程] O493.3[理学—光学]