Observation optical system

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United States of America Patent

PATENT NO 10281706
APP PUB NO 20180017775A1
SERIAL NO

15650061

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Importance

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Abstract

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An observation optical system has an objective system and an eyepiece system in the order from the object side. The objective system includes, in the order from the object side, a first group having a positive power, a second group having a positive power, and a third group having a negative power. The objective system has an inverting optical system. The eyepiece system includes, in the order from the object side, a fourth group having a positive power and a fifth group having a positive power. The third group and the fourth group move in directions separating from each other along an optical axis to thereby perform variable power from a low magnification to a high magnification, and also the following conditional expression is satisfied:

description='In-line Formulae' end='lead'0.28<H×L/f≤0.55   (1).description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
KONICA MINOLTA INCTOKYO TOKYO METROPOLIS

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirose, Naoki Tokyo, JP 48 1792

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