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

2008-09-16

2008-09-16

Thompson, Timothy J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S689000, C359S690000

Reexamination Certificate

active

11701400

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 and subsequent lens units including at least one lens unit having positive power, and the condition (1): 1.50<M1/fW<3.00 (M1is an amount of optical axial movement of the first lens unit, fWis a focal length of the entire zoom lens system at a wide-angle limit) is satisfied.

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