Zoom lens, and image-capturing apparatus

Details Zoom lens, and image-capturing apparatus Zoom lens, and image-capturing apparatus

2007-01-23

2008-10-28

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

Reexamination Certificate

active

07443607

ABSTRACT:
A sufficiently compact zoom lens equipped with a vibration-control function is provided. The zoom lens includes, in sequence from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, and a fourth lens group having positive refractive power. The first lens group includes, in sequence from the object, a lens group having positive refractive power and a bending optical system for bending an optical axis to essentially an angle of 90°. Moreover, the third lens group has a stationary lens group having positive refractive power and a movable lens group having positive refractive power. During zooming operation, the second lens group and the fourth lens group are moved along the optical axis. During vibration-control operation, the movable lens group of the third lens group is moved in a direction orthogonal to the optical axis.

REFERENCES:
patent: 7274516 (2007-09-01), Kushida et al.
patent: 2005/0275948 (2005-12-01), Sueyoshi
patent: 2005-62228 (2005-03-01), None
patent: 2006-71993 (2006-03-01), None

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