Abstract
Light propagation along the helical axis of a planar cholesteric with dichroic dyes is calculated using the 2×2 Jones matrix formulation. The formulation is proved to be more useful than others for evaluating the dye LCD, as it reduces the number of parameters. The perceived contrast ratios are derived, and the dependences on the various cholesteric parameters are estimated. The results show that a small value of Δn and a high-order parameter are essential for improving the dye LCD contrast ratios.
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