Image-taking lens system and digital apparatus using the same

Details Image-taking lens system and digital apparatus using the same Image-taking lens system and digital apparatus using the same

2005-12-23

2009-06-23

Blackman, Rochelle-Ann J (Department: 2862)

Photography

Camera detail

C359S686000, C359S715000, C359S771000

Reexamination Certificate

active

07549809

ABSTRACT:
An aperture stop, a first lens having a positive power, a second lens having a negative power, a third lens having a positive power, and a fourth lens whose concave face is directed toward the image surface side and having a meniscus shape are disposed in order from the object side. The second and third lenses are cemented to each other. Further, focal length “f” of the entire system and total focal length “f23” of the second and third lenses satisfy the following conditional expression.in-line-formulae description="In-line Formulae" end="lead"?|f/f23|<0.4in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 6747810 (2004-06-01), Sato
patent: 2004/0218285 (2004-11-01), Amanai
patent: 2006/0126193 (2006-06-01), Noda
patent: 2002-228922 (2002-08-01), None
patent: 2002-365529 (2002-12-01), None
patent: 2002-365530 (2002-12-01), None
patent: 2002-365531 (2002-12-01), None

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