【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。更多还原

【Abstract】 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.更多还原