Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1992-03-25
1993-04-06
Sikes, William L.
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359 53, 359101, G02F 11347
Patent
active
052008452
ABSTRACT:
A color liquid crystal display and display material formed by microdroplets of chiral or cholesteric liquid crystal phase dispersed in a polymeric matrix. The liquid crystal in the microdroplets exhibits strong negative dielectric anisotropy so that in the presence of an electric field the helical planes of the chiral material align perpendicular to the field. Incident light is reflected at a selected wavelength depending upon the helical pitch. In the field-OFF state, the liquid crystal directors are configured or randomly oriented so as to scatter incident light.
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Crooker Peter P.
Yang Dengke
Duong Tai V.
Sikes William L.
University of Hawaii at Manoa
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