Title: Effects of dichroic dye in UV-cured polymer dispersed liquid crystal films
Authors: Wu, JJ
Wang, CM
Chen, SH
光電工程學系
Department of Photonics
Keywords: dichroic dye;polymer dispersed liquid crystal;absorption;transmittance
Issue Date: 1-May-1996
Abstract: We study the effects of dichroic dye in ''ultraviolet'' polymer dispersed liquid crystal (PDLC) films. Experimental data show that for a dye-doped PDLC film the absorption coefficient for He-Ne laser light is different from that for UV light. Transmittance of a PDLC film changes when the UV curing intensity or dye concentration is varied. It is found that under UV the illumination with a constant intensity the dye concentration can be optimized to obtain minimum transmittance and to improve the contrast ratio. Correspondingly, for a fixed dye concentration the UV curing intensity can be optimized to obtain a minimum transmittance. The experimental results can be described by a theory based on Beer's law. Besides, the experimental results show that the curing temperature is an important factor that affects the nematic liquid crystal droplet size in the UV curing process.
URI: http://dx.doi.org/10.1143/JJAP.35.2681
http://hdl.handle.net/11536/1333
ISSN: 0021-4922
DOI: 10.1143/JJAP.35.2681
Journal: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
Volume: 35
Issue: 5A
Begin Page: 2681
End Page: 2685
Appears in Collections:Articles


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  1. A1996UQ20700027.pdf