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Patent
G - Physics
02
F
G02F 1/1335 (2006.01) G02F 1/1347 (2006.01) G02F 1/135 (2006.01) G02F 1/139 (2006.01) G02F 1/141 (2006.01) G02F 1/21 (2006.01) G02F 1/13363 (2006.01) G02F 1/1337 (2006.01) G02F 1/1343 (2006.01)
Patent
CA 2123310
2123310 9310477 PCTABS00022 The present invention provides optical modulators which comprise aligned chiral smectic liquid crystal cells within an optical resonance cavity. The cavity configurations include symmetric and asymmetric Fabry-Perot etalons. The liquid crystal cells can be planar- or homeotropically-aligned and can be discrete state or analogue cells. The device configurations of the present invention provide discrete or continuous optical modualtion of the phase, intensity, and wavelength of elliptically polarized light, without requiring polarization analyzers. The modulators are optically or electronically addressable in single pixels or arrays of multiple pixels. Certain homeotropically-aligned cells are provided as an aspect of this invention, as are certain variable retarders comprised of planar-aligned cells in combination with birefringent elements. For example, the figure T shown includes a photo sensitive layer (110), reflective surfaces (113-114), a wave plate (112) and a chiral smetic liquid crystal (111).
Johnson Kristina M.
Sharp Gary D.
Sim & Mcburney
University Of Colorado Foundation Inc. (the)
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