Scattering light interference from liquid crystal polymer dispersion films

Chi-Yen Huang; Ming-Shann Tsai; Chi-Huang Lin; Andy Ying-Guey Fuh

doi:10.1117/12.452484

12 December 2002 Scattering light interference from liquid crystal polymer dispersion films

Chi-Yen Huang, Ming-Shann Tsai, Chi-Huang Lin, Andy Ying-Guey Fuh

Proceedings Volume 4799, Liquid Crystals VI; (2002) https://doi.org/10.1117/12.452484
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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.

Citation Download Citation

Chi-Yen Huang, Ming-Shann Tsai, Chi-Huang Lin, and Andy Ying-Guey Fuh "Scattering light interference from liquid crystal polymer dispersion films", Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); https://doi.org/10.1117/12.452484

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