Light Transmission and Texture Changes of Mixed Liquid Crystals by Temperature Variations
- 1 February 1981
- journal article
- research article
- Published by Informa UK Limited in Molecular Crystals and Liquid Crystals
- Vol. 65 (1), 39-49
- https://doi.org/10.1080/00268948108076129
Abstract
The changes in liquid-crystal light transmission caused by temperature variations are investigated in connection with texture changes. Materials under investigation are the nematic-cholesteric and the smectic-cholesteric mixed liquid crystals. In the nematic-cholesteric mixed liquid crystal, the light scattering centers produced by the temperature variation from the liquid phase to the cholesteric phase cannot disappear with the applied voltage of 1 kHz. On the contrary, the light scattering centers produced in the dynamic scattering mode can disappear with the applied voltage of 1 kHz. In the cholesteric phase of a smectic-cholesteric mixed liquid crystal, the planar texture appears in a heating process but the focal conic texture in a cooling process. This texture difference causes the difference in the light transmission between the heating and the cooling processes. Further, the difference in the light transmission of a planar texture depends on the mesh area: as the area is larger, the transmission is greater.Keywords
This publication has 10 references indexed in Scilit:
- Composition, Properties and Structures of Liquid Crystalline Phases in Systems of Amphiphilic CompoundsAdvances in Liquid Crystals, 1975
- Anisotropy Changes in the Cholesteric to Nematic Phase TransitionMolecular Crystals and Liquid Crystals, 1975
- Formation of synthetic images on a laser-beam-adressed smectic liquid-crystal displayElectronics Letters, 1975
- Dynamics of Texture Transitions in Cholesteric-Nematic MixturesMolecular Crystals and Liquid Crystals, 1974
- ir-laser-addressed thermo-optic smectic liquid-crystal storage displaysApplied Physics Letters, 1973
- Light scattering and microscopic investigations of mesophase transition of cholesteryl myristate. I. Morphology of the cholesteric phaseThe Journal of Physical Chemistry, 1973
- Electric Field Induced Texture Changes in Certain Nematic/Cholesteric Liquid Crystal MixturesMolecular Crystals and Liquid Crystals, 1973
- The dependence of the electric-field-induced cholesteric-nematic transition on the dielectric anisotropyPhysics Letters A, 1972
- Thermo-Optic Effects in Nematic-Cholesteric MixturesJournal of Applied Physics, 1970
- ac-Field-Induced Grandjean Plane Texture in Mixtures of Room-Temperature Nematics and CholestericsPhysical Review Letters, 1970