Laser projection display system
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United States of America Patent
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Jun 10, 2003
Grant Date -
N/A
app pub date -
Jan 15, 2002
filing date -
Jan 15, 2002
priority date (Note) -
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Abstract
A display apparatus includes a laser light source for emitting a light beam having a coherence length; a beam expander for expanding the light beam; a spatial light modulator; beam shaping optics for shaping the expanded laser beam to provide uniform illumination of the spatial light modulator, the beam shaping optics including a fly's eye integrator having an array of lenslets; a diffuser located in the light beam between the laser light source and the beam shaping optics; an electrically controllable de-speckling modulator for modifying the temporal and spatial phase of the light beam; and a projection lens for producing an image of the spatial light modulator on a distant screen.
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