Zoom lens and image pickup apparatus using the same

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United States of America Patent

PATENT NO 10656398
APP PUB NO 20180017771A1
SERIAL NO

15717829

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Abstract

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A zoom lens includes a front-side lens unit, a rear-side lens unit, and an aperture stop. The front-side lens unit includes either one lens unit having a negative refractive power or two lens units having a negative refractive power, and has a negative refractive power as a whole. The rear-side lens unit is disposed on an image side of the front-side lens unit, and has a positive refractive power as a whole at a telephoto end. The rear-side lens unit includes a plurality of lens units, and includes an object-side positive lens unit having a positive refractive power which is disposed nearest to object and the following conditional expressions (1), (2), and (3) are satisfied:

description='In-line Formulae' end='lead'1.2≤|MGB_t|≤6  (1),description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'10≤νdGn_min_p≤27  (2), anddescription='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'−0.03≤TpGn_min_p≤0.014  (3).description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
OM DIGITAL SOLUTIONS CORPORATION49-3 TAKAKURAMACHI HACHIOJI-CITY TOKYO 192-0033

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawamura, Kazuteru Hachioji, JP 62 489
Kon, Toyoki Hachioji, JP 16 129

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