Wavelength Dependence of Scattering in PDLC Films: Droplet Size Effects
作者:
Jack Kelly,
Wei Wu,
Peter Palffy-muhoray,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1992)
卷期:
Volume 223,
issue 1
页码: 251-261
ISSN:1058-725X
年代: 1992
DOI:10.1080/15421409208048256
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
We have measured the optical transmittance of UV-cured epoxy PDLC films at normal incidence as a function of applied voltage for a number of different wavelengths. By controlling the cure rate of each film, we were able to study a range of droplet sizes from approximately 0.5 microns to 2.5 microns. By assuming a simple exponential decay law for the transmitted intensity, we have extracted the wavelength dependence of the effective droplet scattering cross-section. This cross-section depends strongly on both the applied voltage and the droplet size. We compare the results with a model based on the anomalous diffraction description of the scattering and find good quantitative agreement.
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