Tips Texture Photo Liquid Crystal Instrumentation Hot-Stage Sample Preparation	Texture Observation of Liquid Crystals Tips Polarization Color Chart Limitation of Retardation Measurement by Berek Compensator Image degradation by spherical aberration Texture of Liquid Crystals Liquid Crystal Phases Liquid Crystal Liquid Crystal Optics of Birefringent Substances Instrumentation Polarized Light Microscope Camera Hot Stage Sample Preparation