TITLE:
Optical Measurements of Thermotropic Liquid Crystals
AUTHORS:
Tawfik A. El-Dessouki, Mohammed Roushdy, Nabil I. Hendawy, Magdi M. Naoum, Ayman A. Zaki
KEYWORDS:
Thermotropic Liquid Crystal; Interference; Birefringence; Speckle Photography
JOURNAL NAME:
Journal of Modern Physics,
Vol.4 No.1,
January
18,
2013
ABSTRACT: 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.