Three lens group zoom lens

Details Three lens group zoom lens Three lens group zoom lens

2007-02-13

2007-02-13

Ben, Loha (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S689000

Reexamination Certificate

active

11316979

ABSTRACT:
A three lens group zoom lens is provided and includes three lens groups of negative, positive, and positive in this order from an object side and varies a magnification by changing distances among respective lens groups. A first group includes, in order from the object side, a negative lens in a meniscus shape directing a convex surface on the object side, a negative lens in a meniscus shape directing a convex surface on the object side, and a positive lens in a meniscus shape directing a convex surface on the object side. A second group includes, in order from the object side, a cemented lens including a bi-convex lens and a bi-concave lens, and a lens in a meniscus shape directing a concave surface on the object side. A third group includes a positive lens. Each of the first group and the second group includes an aspherical surface.

REFERENCES:
patent: 2005/0024749 (2005-02-01), Nanba et al.
patent: 2003-107348 (2003-04-01), None
patent: 2003-140041 (2003-05-01), None

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3862160