Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals · 1992 · 31 citations · 4 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOpticsThin FilmsDiffractionOptical Properties Of MaterialsOptical Thin FilmsPolymer Thin FilmsScattering TheoryThin Film Optical PropertiesDroplet Size DistributionDroplet Size MeasurementExponential DecayExponential Decay ModelsOptical Thin Film CharacterizationOptical TransmittanceThin-film Optical CharacterizationWavelength Dependence
Abstract 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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Light scattering from a small nematic droplet
S. Žumer, J. W. Doane · Physical review. A, General physics · 1986 · 303 citations