Zoom lens and image pickup device

Details Zoom lens and image pickup device Zoom lens and image pickup device

2009-11-03

2011-10-04

Spector, David N (Department: 2873)

Television

Camera, system and detail

Optics

C348S240300, C359S682000

Reexamination Certificate

active

08031256

ABSTRACT:
Disclosed herein is a zoom lens formed by arranging a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a third lens group having a positive refractive power in order from an object side to an image side, wherein at a time of varying power from a wide-angle end to a telephoto end, the first lens group is moved, the second lens group is moved to the object side, and the third lens group is moved to the image side such that an air interval between the first lens group and the second lens group is decreased and such that an air interval between the second lens group and the third lens group is increased.

REFERENCES:
patent: 6903878 (2005-06-01), Nanba
patent: 7830615 (2010-11-01), Kanai et al.
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patent: 2005-024988 (2005-01-01), None
patent: 2005-037727 (2005-02-01), None
patent: 2007-108531 (2007-04-01), None
patent: 2007-286577 (2007-11-01), None
Japanese Office Action issued Aug. 19, 2010 for corresponding Japanese Application No. 2008-295878.

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