摘要
本文简介了国内外向列相液晶相位调制特性的研究概况，对ＺＬＩ－１５６５型平行、扭曲型向列相液晶的相位调制特性进行了实验研究。结果表明平行式向列液晶相移量大、光强变化小，并利用这一特性，将相移技术引入到剪切电子散斑干涉术中，提高了检测精度；相移方法简单、可靠。用该系统进行应变场的测量实验，取得了满意的效果。
In this paper, characteristics of phase modulation of ZLI-1565 nematic liquid crystal is studied, The resulut indicate that parallel aligned LC has larger phase shift amount and less changes in amplitude. Based on the study, a new phase-shifting shearing ESPI system which use parallel-aligned liquid crystal as a phase modlator is set up. This method increases the mearsuring accuracy of shearing ESPI by combine phase-shifting technology with shearing ESPI
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
1995年第3期180-182,173,共4页
Journal of Optoelectronics·Laser
关键词
液晶
相位调制
Nematic liquid crystal, electronic speckle pattern interferometry,phase shifting.
