Zoom lens and imaging apparatus

Details Zoom lens and imaging apparatus Zoom lens and imaging apparatus

2009-03-27

2010-10-19

Choi, William C (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S726000

Reexamination Certificate

active

07817348

ABSTRACT:
A zoom lens is provided and includes: in order from an object side of the zoom lens, a first lens group adapted to be fixed during power-varying of the zoom lens, the first lens group having a positive power and including in order from the object side, a negative lens, a reflecting member that bends an optical path thereof, and a biconvex lens of a positive lens made of a resin material and having at least one aspherical surface; a second lens group adapted to move during the power-varying, the second lens group having a negative power and including two lenses; a third lens group adapted to be fixed during the power-varying and including one positive lens; and a fourth lens group adapted to move during the power-varying and during focusing of the zoom lens, the fourth lens having a positive power and including in order from the object side, a cemented lens having a positive power, and a negative lens made of a resin material and having at least one aspherical surface and a concave surface on an image side of the fourth lens.

REFERENCES:
patent: 7242529 (2007-07-01), Sato et al.
patent: 2003/0161620 (2003-08-01), Hagimori et al.
patent: 2004/0233302 (2004-11-01), Kojima
patent: 2006/0215277 (2006-09-01), Sato
patent: 1 881 357 (2008-01-01), None
patent: 2000-131610 (2000-05-01), None
patent: 2003-202500 (2003-07-01), None
patent: WO-2007/032509 (2007-03-01), None
Chinese Office Action issued May 4, 2010 (with English translation) in corresponding Chinese Application No. 200910130147.1.

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