Zoom lens and projector using the same
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United States of America Patent
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Feb 17, 2015
Grant Date -
Mar 20, 2014
app pub date -
Sep 12, 2013
filing date -
Sep 14, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A zoom lens includes a negative lens unit arranged closest to an enlargement conjugate side among lens units having negative refractive power included in the zoom lens, at least one positive lens unit having positive refractive power arranged closer to the enlargement conjugate side than the negative lens unit, and a rear lens unit including at least one lens unit and arranged closer to a reduction conjugate side than the negative lens unit, wherein a distance between adjacent lens units is changed during zooming, a stop is arranged closer to the reduction conjugate side than the negative lens unit, the rear lens unit includes at least one positive lens, and the positive lens satisfies a predetermined condition.
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