Zoom lens and image pickup device

Details Zoom lens and image pickup device Zoom lens and image pickup device

2010-11-17

2011-10-18

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000, C359S684000, C359S685000, C359S687000, C359S714000, C359S740000, C359S763000, C359S764000

Reexamination Certificate

active

08040614

ABSTRACT:
Disclosed herein is a zoom lens including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The zoom lens satisfies following conditional expressions (1) and (2),in-line-formulae description="In-line Formulae" end="lead"?0.03<H1′/f1<0.3  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0.3<|f2|/√(fw·ft)<0.65  (2)in-line-formulae description="In-line Formulae" end="tail"?where H1′ is an interval from a vertex of a surface nearest to the image side in the first lens group to a principal point on the image side of the first lens group (− denotes the object side, and + denotes the image side), f1is focal length of the first lens group, f2is focal length of the second lens group, fw is focal length of an entire lens system at a wide-angle end, and ft is the focal length of the entire lens system at a telephoto end.

REFERENCES:
patent: 6320698 (2001-11-01), Suzuki
patent: 7221511 (2007-05-01), Toyama
patent: 7463427 (2008-12-01), Nanjo et al.
patent: 2007/0273980 (2007-11-01), Horiuchi
patent: 2008/0304162 (2008-12-01), Yamasaki
patent: 4007258 (2007-09-01), None
patent: 2009-175648 (2009-08-01), None

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