SYSTEM AND METHOD FOR SPECKLE REDUCTION FROM A COHERENT LIGHT SOURCE IN A PROJECTION DEVICE
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United States of America Patent
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Issued Date -
Jun 25, 2009
app pub date -
Dec 20, 2007
filing date -
Dec 20, 2007
priority date (Note) -
Abandoned
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Abstract
Embodiments of the present invention are directed to a system and method for reducing speckle phenomenon caused by a coherent light source. Particular embodiments of the present invention are directed to a system and method for temporally varying the interference pattern generated by a coherent light source to homogenize the speckle pattern so that the speckle phenomenon is less observable. In accordance with an exemplary embodiment, an oscillating refractive element may be disposed within an optical system to create a temporally variable phase shift in the lights rays emanating from a coherent light source to eliminate static interference patterns on a light receiving element, reducing the speckle phenomenon.
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