Catadioptric optical element and optical system including same
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United States of America Patent
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Feb 3, 2015
Grant Date -
Dec 12, 2013
app pub date -
Jun 8, 2012
filing date -
Jun 8, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A catadioptric lens comprises, a first surface configured to introduce a ray within the catadioptric lens; and a second surface, with a reflective film, configured to reflect the introduced ray to the first surface; the second surface having a first reflection area and a second reflection area surrounded by the first reflection area, wherein the ray, which has been introduced from the first surface and has traveled to the first reflection area, is reflected on the first reflection area by total internal reflection, and the ray, which has been introduced from the first surface and has traveled to the second reflection area, is reflected by the reflective film.
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