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Proceedings Paper

Scattering light interference from liquid crystal polymer dispersion films
Author(s): Chi-Yen Huang; Ming-Shann Tsai; Chi-Huang Lin; Andy Ying-Guey Fuh
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Paper Abstract

The Quetelet-type ring pattern is observed in liquid crystal polymer dispersion (LCPD) films. The clusters of the polymer network and liquid crystal (LC) domains with different director axes in the LCPD films serve as scatterers. Cells with unidirectional and multidirectional rubbins are fabricated. Experimental results show that the polarization of incident light, the applied voltage and the ambient temperature significantly affect the ring intensities. However, the contribution of the LC domains is not evident until the voltage is applied. Finally, rubbing the cells in multiple directions reveals that measurement of the Quetelet-type ring intensity can be used to readily identify the orientation of the liquid crystals. This finding also reveals that the LCs in an LCPD mixture are aligned closer to the final rubbing direction than are pure LCs in a multidirectional rubbed cell. A simple model was proposed to explain the observations.

Paper Details

Date Published: 12 December 2002
PDF: 10 pages
Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); doi: 10.1117/12.452484
Show Author Affiliations
Chi-Yen Huang, Kun Shan Univ. of Technology (Taiwan)
Ming-Shann Tsai, Chung Yuan Christian Univ. (Taiwan)
Chi-Huang Lin, National Cheng Kung Univ. (Taiwan)
Andy Ying-Guey Fuh, National Cheng Kung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 4799:
Liquid Crystals VI
Iam-Choon Khoo, Editor(s)

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