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Recent studies on the behavior of nematic liquid crystals (LC’s) in two basic configurations are described. The phase rate of change Δϕ/Δt is studied for the case of parallel aligned nematic cells. It is shown that Δϕ/Δt of approximately 3 rad/msec can be obtained with a 4-μm E-7 LC at λ = 0.63 μm. The optical transmission of a 900 twisted-nematic cell is studied with regard to its dependence on the polarization angle of incidence.
Efron et al. (Sat,) studied this question.