Optical Measurements of Thermotropic Liquid Crystals

• 作者: Ayman A. Zaki Magdi M. Naoum Mohammed Roushdy Nabil I. Hendawy Tawfik A. El-Dessouki
• 来源期刊: 现代物理(英文)
• 学科: 化学
• 关键词: THERMOTROPIC Liquid CRYSTAL INTERFERENCE BIREFRINGENCE SPECKLE PHOTOGRAPHY
• 年，卷（期）: 2013,（1）
• 页码范围: 39-48
• 页数: 10页
• 分类号: O6

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.