Catadioptric optical system and image-pickup apparatus having the same
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United States of America Patent
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Aug 18, 2015
Grant Date -
Dec 13, 2012
app pub date -
Apr 20, 2011
filing date -
Apr 28, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A catadioptric optical system of the present invention includes a catadioptric unit configured to condense light fluxes from an object and to form an intermediate image of the object, a field lens disposed at a position where the intermediate image are formed, and a dioptric unit configured to form the intermediate image on an image surface, and when νcat denotes a smallest Abbe number in Abbe numbers of materials of the first and second optical elements configuring the catadioptric unit and νdio denotes a smallest Abbe number in Abbe numbers of materials of a plurality of dioptric optical elements configuring the dioptric unit, νdio<νcat is satisfied.
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