Liquid crystal device for continuous rotation of selective polarization of monochromatic light
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United States of America Patent
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Apr 1, 1986
Grant Date -
N/A
app pub date -
Jul 12, 1983
filing date -
Apr 20, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A liquid crystal device for continuous rotation of the selective polarization of monochromatic light is provided by a cholesteric mixture with positive dielectric anisotrophy contained between a pair of glass plates which are conductive on the surface in contact with the mixture and have received a surface treatment to provide planar orientation for the mixture. A voltage is applied between the two glass plates and an input light polarizer is applied to one of the two glass plates. The device preferably uses a cholesteric mixture comprising cholesteryl chloride (31.2%), cholesteryl oleyl carbonate (47.7%) and cholesteryl nonanoate (21.1%) and is advantageously employed in laboratory polarization rotators and colored display units.
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