Zoom lens and imaging apparatus incorporating the same

Details Zoom lens and imaging apparatus incorporating the same Zoom lens and imaging apparatus incorporating the same

2008-08-25

2010-10-19

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S684000

Reexamination Certificate

active

07817347

ABSTRACT:
The invention relates to a zoom lens and an imaging apparatus incorporating the same, and more particularly to a zoom lens of small format that lends itself to imaging apparatus inclusive of video cameras and digital cameras. The zoom lens comprises, in order from its object side, a first lens group G1of positive refracting power, a second lens group G2of negative refracting power and a third lens group G3of positive refracting power. Zooming is implemented by changing the space between the respective lens groups. The first lens group G1comprises one negative lens and one positive lens in order from the object side. The zoom lens satisfies conditions (1) and (2):in-line-formulae description="In-line Formulae" end="lead"?5.0<ft/fw<50.0  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.4<Nd1p<1.7  (2)in-line-formulae description="In-line Formulae" end="tail"?where fwis the focal length of the whole zoom lens system at a wide-angle end, ftis the focal length of the whole zoom lens system at a telephoto end, and Nd1pis the d-line refractive index of the positive lens in the first lens group.

REFERENCES:
patent: 6606200 (2003-08-01), Nakayama et al.
patent: 7466496 (2008-12-01), Hoshi
patent: 7554746 (2009-06-01), Ohashi
patent: 7609456 (2009-10-01), Saori
patent: 2006/0098301 (2006-05-01), Miyajima
patent: 8-271788 (1996-10-01), None
patent: 11-052244 (1999-02-01), None
patent: 2006-171055 (2006-06-01), None

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