Factors Affecting the Anisotropic and Dynamic Scattering Characteristics of an Ester Mixture.
HUGHES RESEARCH LABS MALIBU CA
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Various factors affecting the anisotropic and dynamic scattering DS characteristics of a 3-component eutectic mixture of phenyl benzoates are investigated in detail. The effects of dopant, surface alignment, signal, cell thickness, and temperature are studied. Different dopant structures give conductivity anisotropy values in the 1.01 to 1.60 range and this has the largest effect on the DS threshold voltage at room temperature. However, cell thickness also changed the threshold slightly and has a large effect on the magnitude of the scattering obtained above threshold. Thinner cells give higher DS levels, higher multiplexing capabilities, and greater off-angle scattering. The optical density of scattering increases linearly with the reciprocal of cell thickness. At elevated temperatures the conductivity anisotropy, viscosity and elastic values all decrease. However, with the increasing temperature the DS threshold voltage decreases, indicating that changes in viscosity and elastic constants with temperature are more significant than decrease in conductivity anistropy. Author