Zoom lens and imaging capturing device

Details Zoom lens and imaging capturing device Zoom lens and imaging capturing device

2011-08-02

2011-08-02

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000

Reexamination Certificate

active

07990623

ABSTRACT:
An object is to reduce the effect of defocusing due to the movement of an image plane when a shifting lens group movable in a direction perpendicular to the optical axis for correcting hand jiggling is positionally deviated along the optical axis, thereby maintaining high optical performance at the time of correcting hand jiggling. A zoom lens1includes a plurality of lens groups with distances between the lens groups being changed for variable power. A final lens group L5which is positioned most closely to an image side has a sub lens group GS (G8) having a positive refractive power and a sub lens group GR (G9) disposed adjacent to the sub lens group GS (G8) on the image side and having a positive refractive power. The sub lens group GS is shiftable in a direction perpendicular to the optical axis for correcting image blurs. The sub lens group GS has a lateral magnification βs and the sub lens group GR has a lateral magnification βR, the lateral magnifications satisfying the following conditional expressions (1), (2):in-line-formulae description="In-line Formulae" end="lead"?βs<1  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0<βR<1  (2)in-line-formulae description="In-line Formulae" end="tail"?

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International Preliminary Search Report on Patentability dated: Nov. 1, 2007.

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