Diffuser configuration for an image projector
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United States of America Patent
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-
Feb 7, 2012
Grant Date -
Jul 23, 2009
app pub date -
Jan 22, 2008
filing date -
Jan 22, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to one embodiment, an image projector has a spatial light modulator (SLM) adapted to modulate illumination from a laser with a spatial pattern such that the modulated illumination projects an image on a viewing screen. The image projector further has an optical diffuser located on an optical path between the laser and the SLM. The laser is adapted to illuminate the SLM through the optical diffuser to create an illuminated area at the SLM. The optical diffuser is adapted to introduce an angular spread into the light transmitted therethrough. The image projector is adapted to move the illuminated area with respect to the SLM to mitigate speckle in the projected image.
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