Zoom lens system

Details Zoom lens system Zoom lens system

2007-05-01

2007-05-01

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S557000, C359S689000, C359S716000, C359S740000, C359S784000

Reexamination Certificate

active

11389235

ABSTRACT:
Providing a compact zoom lens system having high optical performance suitable for an electronic imaging device with a large number of pixels. The zoom lens system includes, in order from an object, a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power. When zooming from a wide-angle end state to a telephoto end state, the first lens group and the second lens group are moved such that a distance between the first lens group and the second lens group decreases, and a distance between the second lens group and the third lens group increases. The second lens group is composed of at least two positive lens elements and one negative lens element. At least one positive lens element and the negative lens element in the second lens group satisfy given conditional expressions.

REFERENCES:
patent: 5969881 (1999-10-01), Konno
patent: 6496310 (2002-12-01), Fujimoto
patent: 6597513 (2003-07-01), Minefuji
patent: 7016118 (2006-03-01), Wada
patent: 10-161024 (1998-06-01), None
patent: 10-161024 (1998-06-01), None
patent: 2002-277740 (2002-09-01), None
patent: 2002-277740 (2002-09-01), None

Affiliated with

Also associated with

Rating

Zoom lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom lens system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3726354