PROJECTION APPARATUS AND PROJECTION LENS THEREOF
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United States of America Patent
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Issued Date -
Jan 2, 2014
app pub date -
Jun 27, 2012
filing date -
Jun 27, 2012
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Abstract
A projection lens includes a first image system, a second image system, and a concave reflector arranged in order. The first image system and the second image system define an optical axis, and the concave reflector is disposed at a first side of the optical axis. A projection apparatus using the projection lens is also provided, wherein the first image system is disposed between a light valve of the projection apparatus and the second image system, and the light valve is disposed at the first side of the optical axis.
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