Optical: systems and elements – Lens – With variable magnification
Patent
1995-10-24
1998-06-02
Sugarman, Scott J.
Optical: systems and elements
Lens
With variable magnification
G02B 1516
Patent
active
057609691
ABSTRACT:
A compact, high-performance zoom lens is disclosed comprising four lens groups in a positive-negative-negative-positive refractive power arrangement and capable of imaging an object on an image plane over a range of magnifications from a wide-angle mode to a telephoto mode (preferably spanning a zooming ratio of at least 16). In the most preferred embodiment, the zoom lens comprises, coaxially objectwise to imagewise: a first lens group having positive overall refractive power and comprising four lens elements; a second, axially movable for zooming, lens group having negative overall refractive power and comprising five lens elements including a lens element with an aspherical surface; a third, axially movable for zooming, lens group having negative overall refractive power and comprising two lens elements; and a fourth lens group having positive overall refractive power and comprising ten lens elements. Such a zoom lens preferably satisfies one or more of the following conditions:
REFERENCES:
patent: 4871239 (1989-10-01), Masumoto et al.
patent: 5175648 (1992-12-01), Mori
patent: 5327290 (1994-07-01), Fukushima et al.
Nikon Corporation
Sugarman Scott J.
LandOfFree
Compact high-performance 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 Compact high-performance zoom lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact high-performance zoom lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1467347