Zoom lens for digital image capturing apparatus

Details Zoom lens for digital image capturing apparatus Zoom lens for digital image capturing apparatus

2006-04-18

2006-04-18

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

Reexamination Certificate

active

07031073

ABSTRACT:
A zoom lens for digital image capturing apparatus is a shared lens of digital static cameras and digital video cameras. It contains three lens groups. From the object plane to the image plane, the first lens group has a negative refractive power, the second lens group has a positive refractive power, and the third lens group has a positive refractive power. As the focal length of the zoom lens changes from long (telescope) to short (wide-angle), the second lens group moves from the object plane to the image plane. The third lens group and the first lens group move with the second lens group.

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patent: 6597513 (2003-07-01), Minefuji
patent: 6611386 (2003-08-01), Tanaka
patent: 2002/0051301 (2002-05-01), Noguchi et al.
patent: 2003-5072 (2003-01-01), None

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