快速测量扭曲向列相液晶盒盒厚  

Fast Measurement of the Twist Nematic Liquid Crystal Cell Gap

作　　者：崔宏青[1,2] 陈冬静[1,2] 任娇燕[1,2] 冯亚云[1,2] 凌志华[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所激发态物理中科院重点实验室,长春130033 [2]中国科学院研究生院,北京100049

出　　处：《光子学报》2009年第4期918-922,共5页Acta Photonica Sinica

基　　金：国家“973计划”(2003CB314704)资助

摘　　要：提出了一种利用圆偏光仪测量扭曲向列相液晶盒盒厚的新方法,即:圆偏光仪组成为两端是一对起偏器和检偏器,中间放置一对四分之一波片.起偏器和检偏器平行或垂直放置,其中一个四分之一波片的快轴和起偏器透光轴成45°,另一个四分之一波片的快轴和起偏器透光轴成-45°.液晶盒样品直接插入到两四分之一波片中间,无需调整方向.不同于旋转液晶盒或偏振片寻找输出光强最大值或最小值的方法,圆偏光仪测量盒厚不需要旋转任何光学元件或液晶盒观测输出光强的变化,只需要观测检偏器在平行和垂直方向的两个强度值,能够实现快速测量,简洁而且有效.A new method of fast measuring the twist nematic liquid crystal cell gap utilizing circular polarized light meter was proposed. The circular polarized light meter include a pair of crossed polarizer and analyzer at the front and back side, and a pair of crossed quarter wave plates in the middle of the system. The liquid crystal cell sample was inserted between the two quarter wave plates directly, and there is no need for modulating the orientation of the cell. Being different from the rotating polarizer/or liquid crystal cell method to find the maximum or minimum output intensity value, there is no need of rotating any optical elements or the liquid crystal cell for the circular polarized light meter method to measure the cell thickness of liquid crystal cell, and it is enough to measure the two intensity values in the parallel and vertical orientation. The experiment results indicated that this method is fast and effective.

关 键 词：液晶 圆偏振光 邦加球 

分 类 号：O438.1[机械工程—光学工程]