Imaging lens system and imaging apparatus incorporating the same

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United States of America Patent

PATENT NO 11934036
APP PUB NO 20220291481A1
SERIAL NO

17831449

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An imaging lens system includes a first group having positive power and a second group having positive power disposed in that order from an object side to an image. The first group includes a first sub-group and a second sub-group. The second group includes a third sub-group, a stop, and a fourth sub-group. Conditional expressions (1), (2), and (3) below are satisfied:

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and

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where

    f denotes a focal length of an entirety of the imaging lens system focused at infinity,f1 denotes a focal length of the first group,f2 denotes a focal length of the second group focused at infinity,f2a denotes a focal length of the third sub-group focused at infinity, andR1aN denotes a radius of curvature of a surface closest to the image side within the first sub-group.

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Patent Owner(s)

  • RICOH COMPANY, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Murayama, Minoru Tokyo, JP 27 415

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