Zoom lens and imaging apparatus

Details Zoom lens and imaging apparatus Zoom lens and imaging apparatus

2011-07-26

2011-07-26

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S683000, C359S684000, C359S687000, C359S715000, C359S726000, C359S727000, C359S771000

Reexamination Certificate

active

07986467

ABSTRACT:
This is addressed to provide a zoom lens which has a good optical performance for imaging device having a large number of pixels even with its simple construction, and which can also be small and thin in structure, and an imaging apparatus using the zoom lens. A zoom lens1is composed by arranging, in the following order from an object side, a first lens group GR1having a weak refractive power, a second lens group GR2having a negative refractive power, a third lens group GR3having a positive refractive power, and a fourth lens group GR4having a positive refractive power, and is configured to perform zooming by moving the second lens group and the third lens group. The first lens group is composed by arranging, in the order from an object side, a single lens G1having a a negative refractive power, a prism G1for folding an optical path, and a single lens G3having a a positive refractive power. The second lens group is composed of one single lens G4having a negative refractive power, and satisfies the following conditional formula (1):in-line-formulae description="In-line Formulae" end="lead"?t2/fw<0.4  (1)in-line-formulae description="In-line Formulae" end="tail"?where t2represents the center thickness of the single lens having a negative refractive power constituting the second lens group, and fw represents the focal length of a whole lens system at a wide-angle position.

REFERENCES:
patent: 5861986 (1999-01-01), Tanaka et al.
patent: 6771432 (2004-08-01), Mihara
patent: 6975462 (2005-12-01), Mihara
patent: 7085070 (2006-08-01), Mihara
patent: 7145730 (2006-12-01), Mihara
patent: 7154680 (2006-12-01), Satori et al.
patent: 7215486 (2007-05-01), Mihara
patent: 7218455 (2007-05-01), Iwasawa
patent: 7286299 (2007-10-01), Matsui
patent: 7505210 (2009-03-01), Kuroda et al.
patent: 7508595 (2009-03-01), Kojima
patent: 7522346 (2009-04-01), Hagimori et al.
patent: 7782542 (2010-08-01), Mihara
patent: 7872806 (2011-01-01), Mihara et al.
patent: 2004/0051960 (2004-03-01), Mihara
patent: 2004/0179273 (2004-09-01), Ishikawa et al.
patent: 2006/0268427 (2006-11-01), Mihara
patent: 1637913 (2006-03-01), None
patent: 64-044908 (1989-02-01), None
patent: 04-223418 (1992-08-01), None
patent: 11-119100 (1999-04-01), None
patent: 11-281889 (1999-10-01), None
patent: 2000-131610 (2000-05-01), None
patent: 2001-091861 (2001-04-01), None
patent: 2002-072089 (2002-03-01), None
patent: 2003-315687 (2003-11-01), None
patent: 2004-348082 (2004-12-01), None
patent: 2004-354869 (2004-12-01), None
patent: 2005-266173 (2005-09-01), None
patent: 2005-308963 (2005-11-01), None
patent: 2006-154481 (2006-06-01), None
patent: 2006-163075 (2006-06-01), None
International Search Report dated Jun. 28, 2007.
Japanese Patent Office Action corresponding to Japanese Serial No. 2006-253251 dated Jul. 1, 2010.
European Patent Office, Search Report and Communication issued in Patent Application EP 07767820.9, on Sep. 24, 2010.

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