Zoom lens system

Details Zoom lens system Zoom lens system

1994-05-16

1996-09-17

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359708, G02B 1514

Patent

active

055574700

ABSTRACT:
A zoom lens system includes a first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power and a fourth lens group having a positive refracting power. These lens groups are arranged in this order as viewed from an object. During zooming operation from the wide angle end to the telephoto end of the zoom lens system, the air space between the first and second lens groups increases and the air space between the third and fourth lens groups decreases. A focal length equal to the diagonal line of the effective image plane of the zoom lens system is included in the zooming range of the zoom lens system. The zoom lens system is formed so as to satisfy various conditions for making the zoom lens system small and giving a high zoom ratio.

REFERENCES:
patent: 5000551 (1991-03-01), Shibayama

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-418052