Optical Measurements of Thermotropic Liquid Crystals  

作　　者：Tawfik A. El-Dessouki Mohammed Roushdy Nabil I. Hendawy Magdi M. Naoum Ayman A. Zaki 

机构地区：[1]Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt [2]Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt [3]Physics Department, Faculty of Science, Benha University, Benha, Egypt [4]Physics Department, Faculty of Science, Cairo University, Giza, Egypt

出　　处：《Journal of Modern Physics》2013年第1期39-48,共10页现代物理（英文）

摘　　要：In this work, an experimental approach was used for measuring birefringence of thermotropic liquid crystal materials at different wavelengths in the visible region by using speckle interferometry. Also the values of the refractive indices were measured for these thermotropic liquid crystal materials in isotropic and liquid crystal phases at different wave-lengths. Temperature dependency of the refractive indices for each LC sample at certain wavelengths was investigated in the isotropic and in LC phases.In this work, an experimental approach was used for measuring birefringence of thermotropic liquid crystal materials at different wavelengths in the visible region by using speckle interferometry. Also the values of the refractive indices were measured for these thermotropic liquid crystal materials in isotropic and liquid crystal phases at different wave-lengths. Temperature dependency of the refractive indices for each LC sample at certain wavelengths was investigated in the isotropic and in LC phases.

关 键 词：THERMOTROPIC Liquid CRYSTAL INTERFERENCE BIREFRINGENCE SPECKLE PHOTOGRAPHY 

分 类 号：O6[理学—化学]