Helical Sense and Pitch of Cholesteric Liquid Crystals |
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Authors: | H. Kozawaguchi M. Wada |
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Affiliation: | Department of Electronic Engineering , Faculty of Engineering, Tohoku University , Sendai, 980, Japan |
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Abstract: | The rotatory sense of a circularly polarized light transmitted through a cholesteric liquid crystal cell was studied by measuring the retardation of a birefringent plate placed upon the cell. Furthermore, the dependence of helical pitch on composition is described for various binary cholesteric and nematic-cholesteric mixtures. The helical sense of eleven cholesterics was determined by the experimental results. As a result, it is shown, for example, that cholesteryl chloride has a right-handed helical structure and cholesteryl propionate has a left-handed helical structure. |
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