Beamsplitting structures and methods in optical systems
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United States of America Patent
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Apr 22, 2008
Grant Date -
Nov 1, 2007
app pub date -
May 24, 2004
filing date -
May 22, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Various embodiments involving structures and methods for illumination can be employed, for example, in projectors, head-mounted displays, helmet-mounted displays, back projection TVs, flat panel displays as well as other optical systems. Certain embodiments may include prism elements for illuminating, for example, a spatial light modulator. Light may be coupled to the prism in some cases using fiber optics or lightpipes. The optical system may also include a diffuser having scatter features arranged to scatter light appropriately to produce a desired luminance profile. Other embodiments are possible as well.
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