Refractive optics and projection display apparatus
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United States of America Patent
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Feb 4, 2014
Grant Date -
Dec 1, 2011
app pub date -
Apr 1, 2011
filing date -
Oct 3, 2008
priority date (Note) -
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Abstract
Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics.
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