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United States of America Patent

APP PUB NO 20160216497A1
SERIAL NO

15003200

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Abstract

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The 1-2nd lens group is divided into three lens groups which move when focusing is performed during the magnification change. Even in a case in which the second optical group is formed of one mirror, it is possible for a primary image to contain appropriate aberration and to hereby reduce aberration of an image which is finally projected onto a screen through the second optical group.

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Patent Owner(s)

Patent OwnerAddress
SEIKO EPSON CORPORATIONTOKYO 160-8801

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Minefuji, Nobutaka Azumino-Shi, JP 61 918

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