Optical projecting system
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United States of America Patent
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May 25, 2010
Grant Date -
Nov 2, 2006
app pub date -
Apr 18, 2006
filing date -
May 2, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical projecting system includes a light-splitting unit for splitting composite source light into a plurality of composite light beam components, and a reflective color wheel rotatable about a rotation axis and including a plurality of multi-layer light-reflecting sections for further splitting each of the composite light beam components into a plurality of colored light beam components for subsequent modulation and projection. Each of the multi-layer light-reflecting sections includes a plurality of light-filtering layers stacked along the rotation axis, and each being capable of reflecting light within a predefined distinct wavelength range, and permitting transmission of light outside the predefined distinct wavelength range therethrough. Sequences of the light-filtering layers of an adjacent pair of the multi-layer light-reflecting sections are different from each other.
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