Liquid crystal cells – elements and systems – Liquid crystal system – Variable or rotatable retarder used with other retarders to...
Patent
1997-05-09
1999-07-27
Sikes, William L.
Liquid crystal cells, elements and systems
Liquid crystal system
Variable or rotatable retarder used with other retarders to...
349 9, 349 97, 349106, 349119, 359634, 359494, 359498, G02F 1133, G02B 530, G02B 2714
Patent
active
059299460
ABSTRACT:
A retarder stack for preconditioning at least partially polarized light for input to a modulator includes a first retarder and the second retarder. The first retarder has a first retardance and a first orientation with respect to the partially polarized light and the second retarder has a second retardance and a second orientation with respect to the partially polarized light. The first retarder and second retarder are oriented with respect to each other and the first retardance and the second retardance are selected such that the light output from the second retarder includes a first portion of light and a second portion of light which, if input to a modulator, would be modulated differently. Hence, the retarder stack can be used to precondition light for input to a modulator such as an electro-optic, magneto-optic or other type of modulator.
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Johnson Kristina M.
Sharp Gary D.
ColorLink, Inc.
Parker Kenneth
Sikes William L.
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