US PATENT SUBCLASS 349 / 201
.~ Liquid crystal diffraction element


Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

193  DF  LIQUID CRYSTAL OPTICAL ELEMENT {21}
201.~ Liquid crystal diffraction element {1}
202  DF  .~.~> For beam steering


DEFINITION

Classification: 349/201

Liquid crystal diffraction element:

(under subclass 193) Subject matter wherein changes in the strength of an electric field applied to a liquid crystal cell result in changes in the spacing of a grating formed in the liquid crystal material (wherein the liquid crystal alone forms the diffraction element) or wherein a liquid crystal material fills spaces between equidistant parallel lines which form a diffraction grating.