Optical system and rear projector
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United States of America Patent
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Nov 11, 2008
Grant Date -
Jun 22, 2006
app pub date -
Dec 9, 2005
filing date -
Dec 13, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical system that projects projection light from an image generating device, onto a screen is provided. The optical system comprises: a lens system on which the projection light from the image generating device is incident; and an aspherical mirror with negative power as a whole that is disposed on an optical path between the lens system and the screen, wherein a curvature of the aspherical mirror in the radial direction changes positive to negative on a way from a center to a periphery thereof.
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