正交级联液晶偏振光栅角度偏转模型  

Deflection Angular Model of Orthogonal Cascade Liquid Crystal Polarization Gratings

作　　者：刘壮[1,2] 王启东[2] 王超[1] 史浩东[1] LIU Zhuang;WANG Qidong;WANG Chao;SHI Haodong(Institute of Space Photo-electronics Technology,Changchun University of Science and Technology,Changchun 130022,China;State Key Laboratory of Applied Optics,Changchun Institute of Optics,Fine Mechanics and Physics,China Academy of Sciences,Changchun 130033,China)

机构地区：[1]长春理工大学空间光电技术研究所,长春130022 [2]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,长春130033

出　　处：《光子学报》2021年第11期261-270,共10页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61805028);吉林省教育厅“十三五”科学技术研究规划(No.JJKH20190566KJ);应用光学国家重点实验室开放基金(No.SKLAO2021001A08);长春理工大学青年基金(No.XQNJJ-2018-20)。

摘　　要：目前正交级联液晶偏振光栅使用过程中的偏转角度均被认为是其角分辨率的整数倍,实际使用过程中,正交级联液晶偏振光栅的偏转角度与设计角度存在一定偏差。针对该问题,给出了正交级联液晶偏振光栅偏转角度计算模型。首先根据单片液晶偏振光栅角度偏转理论,推导出级联液晶偏振光栅偏转角度公式,然后进一步推导出二维正交级联液晶偏振光栅角度偏转模型,分析了二维正交级联液晶偏振光栅角度偏转范围与角间隔之间关系,分别计算出满足一定角度范围的角间隔,满足一定角度间隔的角度范围以及同时满足角度范围、角度间隔的设计角间隔。最后分别利用光学设计软件建立了精度为0.001°的软件模型并构建测量精度为0.1°的实物测试系统,证明了角度偏转模型的准确性。At present,the deflection angle of orthogonal cascaded liquid crystal polarization grating is considered to be an integral multiple of its angular resolution.Actually,there is deviation between the actual deflection angle and the design angle of the orthogonal cascade liquid crystal polarization gratings.To solve this problem,the deflection angle formula of cascaded liquid crystal polarization gratings is derived according to the angle deflection theory of single-chip liquid crystal polarization gratings firstly,and then the deflection angle model of two-dimensional orthogonal cascaded liquid crystal polarization gratings is derived,the relationship between the deflection range and the angle resolution of two-dimensional orthogonal cascaded liquid crystal polarization gratings is analyzed,and the actual angle resolution satisfying a certain angle range,the angle range that satisfying the actual angle interval and the design angle interval that satisfying the angle range and angle interval at the same time is calculated respectively.Finally,A software model which measurement accuracy is 0.1°is established use optical design software and a construction which measurement accuracy is 0.1°are established,they prove that the angular deflection model is accurate.

关 键 词：衍射光学 液晶偏振光栅 正交级联 角度范围 角度间隔 

分 类 号：O436.1[机械工程—光学工程]