Zoom lens system, lens barrel, imaging device and camera

Details Zoom lens system, lens barrel, imaging device and camera Zoom lens system, lens barrel, imaging device and camera

2007-02-02

2008-09-09

Pritchett, Joshua L (Department: 2872)

Optical: systems and elements

Image stabilization

By movable refractive structure

C359S554000, C359S687000

Reexamination Certificate

active

07423810

ABSTRACT:
A zoom lens system comprising a plurality of lens units each composed of at least one lens element, wherein an interval between at least any two lens units is changed so that an optical image is formed with a continuously variable magnification, any one of the lens units, any one of the lens elements, or a plurality of adjacent lens elements that constitute one lens unit move in a direction perpendicular to an optical axis, the zoom lens system comprises a first lens unit having positive power, a second lens unit that includes a lens element having a reflecting surface and has negative power, a third lens unit having positive power and a fourth lens unit having positive power, and the condition (1): 1.00<−(1−m2T)×m3T×m4T<2.00 (m2T, m3Tand m4Tare magnifications of the second, third and fourth lens unit, respectively, at a telephoto limit) is satisfied.

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