Optical Measurements and Speckle Photography for Thermotropic Liquid Crystals Mixtures  

作　　者：Ayman A. Zaki 

机构地区：[1]Physics Department, Faculty of Science, Benha University, Benha, Egypt

出　　处：《Journal of Modern Physics》2013年第4期517-521,共5页现代物理（英文）

摘　　要：In this work, an experimental approach of speckle photography was used for measuring birefringence of thermotropic liquid crystals mixtures at different wavelengths in the visible region. Also the dispersion relations were investigated. The values of the refractive indices were measured for these mixtures of thermotropic liquid crystals in isotropic and liquid crystal phase at different wavelengths. The effect of the end group of these LCs used on the values of birefringence was investigated and discussed.In this work, an experimental approach of speckle photography was used for measuring birefringence of thermotropic liquid crystals mixtures at different wavelengths in the visible region. Also the dispersion relations were investigated. The values of the refractive indices were measured for these mixtures of thermotropic liquid crystals in isotropic and liquid crystal phase at different wavelengths. The effect of the end group of these LCs used on the values of birefringence was investigated and discussed.

关 键 词：THERMOTROPIC Liquid CRYSTALS MIXTURES Interference BIREFRINGENCE SPECKLE PHOTOGRAPHY 

分 类 号：O6[理学—化学]