Chinese Optics Letters, 2010, 8 (10): 960, Published Online: Oct. 19, 2010
Simulation and optimization of spatial light modulation of twisted-nematic liquid crystal display Download: 586次
扭曲向列液晶显示器 光调制 琼斯矩阵 优化 230.6120 Spatial light modulators 230.3720 Liquid-crystal devices 160.3710 Liquid crystals
Abstract
The approaches to obtaining desired intensity or phase modulation by twisted-nematic liquid crystal display (TN-LCD) have been extensively studied based on the knowledge of the LCD's internal structure parameters. Generally, the TN-LCD placed between two linear polarizers (P) produces coupled intensity and phase modulation. To obtain the commonly used phase-only modulation, quarter wave plates (QWPs) are often used in front of and/or behind the LCD. Here we present a method to optimize the optical modulation properties of the TN-LCD to obtain phase-only modulation in the configuration of P-QWP-LCD-QWP-P each with proper orientation. Our method is based on the macroscopical Jones matrix descriptions for the LCD, the QWPs, and the linear polarizers. Through Jones matrix calculations, the orientations of the polarizers and QWPs can be optimized to satisfy differently desired modulation demands. In contrast to the traditional method, which requires knowledge of the LCD's internal structure parameters, our method simplified the complicated theory analysis and can work in the absence of information on the LCD's internal structure parameters, which are usually not available for the commercial products.
Baiheng Ma, Baoli Yao, Shaohui Yan, Fei Peng, Junwei Min, Ming Lei, Tong Ye. Simulation and optimization of spatial light modulation of twisted-nematic liquid crystal display[J]. Chinese Optics Letters, 2010, 8(10): 960.