Projection Display with an Inorganic, Dielectric Grid Polarizer
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United States of America Patent
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Issued Date -
Mar 6, 2008
app pub date -
Aug 31, 2006
filing date -
Aug 31, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A projection display or modulation optical system includes a spatial light modulator and an inorganic, dielectric grid polarizer. The spatial light modulator selectively encodes image information on a polarized incident light beam and the inorganic, dielectric grid polarizing beam splitter separates the image information from the beam and produces a polarized image bearing light beam. The grid polarizer includes a stack of film layers disposed over a substrate; each film layer being formed of a material that is both inorganic and dielectric; adjacent film layers having different refractive indices; and at least one of the film layers being discontinuous to form a form birefringent layer with an array of parallel ribs with a period less than approximately 260 nm.
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