Image-capturing optical system, image-capturing optical apparatus and digital device

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United States of America Patent

PATENT NO 9709782
APP PUB NO 20150309293A1
SERIAL NO

14696051

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An image-capturing optical system includes: a positive first lens group; and a positive second lens group, wherein the positive first lens group and the positive second lens group are arranged in order from an object side in the image-capturing optical system, the image-capturing optical system focuses on a close object by moving the second lens group as a whole along a light axis toward the object side, a lens closest to the object side in the second lens group has a convex surface facing the object side, a lens closest to an image side in the second lens group is a positive meniscus lens having a convex surface facing the image side, the image-capturing optical system satisfies following condition expressions (1) to (3)

description='In-line Formulae' end='lead'2.2<1Gr_Fl/FL<3.8  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.9<2Gr_Fl/FL<1.5  (2), anddescription='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'0.45<1Gr_R_nop/1Gr_Thi<0.85  (3).description='In-line Formulae' end='tail'

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Patent Owner(s)

  • KONICA MINOLTA, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Yamada, Keiko Sakai, JP 40 374

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