Zoom lens system and a projector with the zoom lens system

Details Zoom lens system and a projector with the zoom lens system Zoom lens system and a projector with the zoom lens system

2011-05-17

2011-05-17

Martinez, Joseph (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S676000

Reexamination Certificate

active

07944621

ABSTRACT:
A zoom lens system comprising, arranged sequentially from the enlarging side to the reducing side, a first lens group having a negative refractive power as a whole, a second lens group having a positive refractive power as a whole and a third lens group having a positive refractive power as a whole. The third group is fixed during the zooming. The first lens group moves along an optical axis from the enlarging side to the reducing side during zooming from the wide angle end to the intermediate area. The first lens group also moves along the optical axis from the reducing side to the enlarging side during zooming from the intermediate area to the telephoto end. The second lens group moves along the optical axis from the reducing side to the enlarging side during zooming from the wide angle end to the telephoto end. Thus, the zooming operation of the whole lens system is achieved.

REFERENCES:
patent: 7079325 (2006-07-01), Konno
patent: 2004-271668 (2004-09-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2699402