Novel Fast Measurement Method of Twist Angle and Optical Retardation of Liquid Crystal Display
A novel method is proposed to measure twist angle and optical retardation of liquid crystal display in this paper. The new method which is one of single-wavelength methods has three characteristics: using circularly and homogeneously aligned LC cell (CH-LC) as a unique polarization-converting device; using variable sector diaphragm and photodetector to detect the total intensity of transmitted light whose original polarization direction is continuously changed from 0°to arbitrary angle; introducting a method of measuring the total intensity ratio of the transmitted light to eliminate the influence of absorption by the polarizer, analyzer, CH-LC, liquid crystal display and so on. The twist angle (φ) and optical retardation (△nd) can be derived by using Jones matrix analysis and a curve fitting where φ and △ are fitting parameters. Experiment proved the results are accurate, the process of operation is fast, the devices are economical.
Liquid Crystal Display Twist Angle Optical Retardation Circularly and Homogeneously Aligned LC Cell
Xia Huang Yun-Tao Lu Xiang-Jian Kong Hai Jing Guo-Zhu Fu Hu Jin
Changchun Institute of Optics, Fine Mechanics and Physics,Chinese Academy of Science; North Liquid Crystal Engineering Research and Development Center, Changchun 130033, China;Graduate School of the Chinese Academy of Sciences, Beijing 100000, China
国际会议
上海
英文
1001-1004
2007-03-12（万方平台首次上网日期，不代表论文的发表时间）