Efficient arc lamp illuminator for projection system
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United States of America Patent
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-
Aug 12, 2003
Grant Date -
Mar 13, 2003
app pub date -
Sep 7, 2001
filing date -
Sep 7, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arc lamp illuminator for a projection system includes one or more polarization conversion prisms to laterally spread the arc image. A pair or triplet of projection lenses can be used with mirrors and field lenses to direct the arc image along separate paths to separate polarization conversion prisms to further laterally spread the original arc image. A compact arrangement of the two-path embodiment is enabled by the use of a compound light guide including a pair of arc image-sized input ports, a pair of TIR prisms for directing the arc image along a common path, and a rectangular light guide for guiding the arc images to the polarization conversion system.
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Cited Art Landscape
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