Retardation compensator for a liquid crystal-on-silicon imager
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United States of America Patent
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Feb 5, 2008
Grant Date -
Apr 13, 2006
app pub date -
Oct 8, 2004
filing date -
Oct 8, 2004
priority date (Note) -
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Abstract
Phase retardation compensation can be achieved in liquid crystal-on-silicon imagers by stress freezing a photoelastic medium. As a result, a simple, one-piece compensator for the residual birefringence of the imagers may be provided in some cases. The stress may be frozen by subjecting a photoelastic material to a desired stress and temperature regime, resulting in a material which exhibits birefringence due to a stress level which is fixed or frozen at the molecular level within the material.
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