Optical engine architectures
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United States of America Patent
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Jan 22, 2008
Grant Date -
Jan 12, 2006
app pub date -
Jul 5, 2005
filing date -
Jul 12, 2004
priority date (Note) -
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Abstract
An optical engine architecture that operates as either a two-imager or a three-imager optical engine. The optical engine uses a first PBS cube and a second PBS cube having an optical axis between them. In between the first PBS cube and second PBS cube are two quarter wave plates and a dichroic mirror, where the dichroic mirror is disposed between the two quarter wave plates. In the three imager embodiment, a retarder is disposed between the second PBS cube and the quarter wave plate closest to the second PBS cube. In the two imager embodiment, this retarder is not necessary.
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