Optical system and optical apparatus

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United States of America Patent

PATENT NO 9563042
APP PUB NO 20160077332A1
SERIAL NO

14834747

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Abstract

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An optical system consists essentially of, in order from the magnification side, a first lens having a positive refractive power with a convex surface on the magnification side, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, and a sixth lens having a positive refractive power, wherein the following conditional expressions (1) and (2) are satisfied:

description='In-line Formulae' end='lead'0.17<D2/f<0.80  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'−60<νd1−νd2<−15  (2)description='In-line Formulae' end='tail'

where

    D2: distance on the optical axis between the first lens and the second lensf: focal length of the entire systemνd1: Abbe number of the first lens with reference to d-lineνd2: Abbe number of the second lens with reference to d-line.

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Patent Owner(s)

  • FUJIFILM CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baba, Tomoyuki Saitama, JP 41 552
Cho, Michio Saitama, JP 163 1291

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