15 June 1992 Light-scattering properties and mechanisms in nematic dispersions
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We establish some phenomenological relationships for the scattering properties of nematic/droplet polymer films. We find that in powered films film scattering scales exponentially with thickness, indicating that multiple scattering effects appear to be unimportant in powered films. In contrast, multiple scattering effects are very important in strongly scattering unpowered films. We show that for powered films, scattering depends strongly on the refractive index mismatch between the liquid crystal and the polymer matrix. We describe a model which shows a quantitative fit between the model and experiment. We find that the factors influencing scattering differ markedly in powered and unpowered films. In unpowered films, the refractive index gradients between neighboring droplets provides the dominant factor contribution to film scattering, rather than the more familiar LC/polymer refractive index gradient.
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Paul S. Drzaic, Paul S. Drzaic, Anne M. Gonzales, Anne M. Gonzales, "Light-scattering properties and mechanisms in nematic dispersions", Proc. SPIE 1665, Liquid Crystal Materials, Devices, and Applications, (15 June 1992); doi: 10.1117/12.60375; https://doi.org/10.1117/12.60375

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