Image projection system
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United States of America Patent
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-
Jun 24, 2003
Grant Date -
Oct 3, 2002
app pub date -
Jan 30, 2002
filing date -
Jul 19, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electronic projector has a projection system that includes a spatial light modulator (SLM) for importing image information to the projected light beam. The light beam leaving the SLM is prepolarized in a defined orientation and the projected light is polarized in the same orientation so as to effectively block any light that has been scattered within the projector and become depolarized. The SLM may be a digital mirror device (DMD). Reflective surfaces within the projector may be covered or coated with material that alters the polarization of reflected stray light from the defined orientation or depolarizes the reflected stray light.
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