Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2008-02-04
2009-11-24
Sugarman, Scott J (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S676000
Reexamination Certificate
active
07623297
ABSTRACT:
A zoom lens includes, in order from an object side, a first lens group fixed upon zooming and wholly having a negative refractive power, a second lens group formed by an optical-path bending prism fixed upon zooming and, a third lens group allowed to move upon zooming and wholly having a positive refractive power, a fourth lens group allowed to move upon zooming and wholly having a negative refractive power, and a fifth lens group fixed upon zooming and wholly having a positive refractive power. By arranging a zooming group having the positive third and negative fourth lens groups without arranging a positive fixed lens group in back of the prism, the overall length can be easily reduced as compared to the structure arranging a fixed lens group between a prism and a zooming group.
REFERENCES:
patent: 4249798 (1981-02-01), Moskovich
patent: 5999329 (1999-12-01), Ohtake
patent: 7068441 (2006-06-01), Kim
patent: 7079328 (2006-07-01), Kuba et al.
patent: 2006/0268426 (2006-11-01), Arimoto et al.
patent: 2000-131610 (2000-05-01), None
patent: 2004-205796 (2004-07-01), None
patent: 2005-173311 (2005-06-01), None
patent: 2005-173313 (2005-06-01), None
patent: 2007-33476 (2007-02-01), None
patent: WO-2004/044638 (2004-05-01), None
patent: WO-2007/009632 (2007-01-01), None
Birch & Stewart Kolasch & Birch, LLP
Fujinon Corporation
Greece James R
Sugarman Scott J
LandOfFree
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 Zoom lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4097118