Image projection system with a polarizing beam splitter
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United States of America Patent
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Dec 23, 2003
Issued Date -
N/A
app pub date -
Sep 9, 2002
filing date -
Jul 28, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
An image projection system includes one or more wire grid polarizing beam splitters and one or more transmissive arrays. A polarized light beams from a light source and pre-polarizer is directed towards the transmissive array which modulates the polarization of the polarized light beam by selectively altering the polarization of the polarized light beam to encode image information thereon and creating a modulated beam. The modulated beam is directed towards the wire grid polarizing beam splitter which acts as an analyzer to separate the modulated beam into reflected and transmitted beams. A screen is disposed in one of the reflected or transmitted beams to display the encoded image information. The polarizing beam splitter is oriented at an angle with respect to the modulated beam such that the reflected beam is directed away from the transmissive array. A plurality of transmissive arrays can be used for different colors. One or more polarizing beam splitters can act as both analyzers and combiners.
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