Projection optical system, projector and image reading device
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United States of America Patent
Stats
-
Apr 16, 2013
Grant Date -
Apr 22, 2010
app pub date -
Mar 5, 2008
filing date -
Mar 7, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An optical system with short total length to project a high quality large image. The system projects an image onto a projection surface, and includes a lens system having a plurality of lenses, and one or more curved mirrors. Light flux of an enlarged image shooting out from the lens system to the projection surface is incident onto a mirror surface of the one of the curved mirrors first of all. Distances OAL and Y satisfy a requirement 20
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