Zoom lens system

Details Zoom lens system Zoom lens system

1983-08-10

1986-02-25

Corbin, John K.

350423, 350432, G02B 1500

Patent

active

045726205

ABSTRACT:
A zoom lens system comprising a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having negative refractive power and a fourth lens group having positive refractive power, the zoom lens system being arranged to be zoomed by moving the second and third lens groups, at least one lens element in the fourth lens group being arranged as a plastic lens, the zoom lens system being thereby arranged to be small in size, light in weight and low in price and, at the same time, to have high performance.

REFERENCES:
patent: 3972592 (1976-08-01), Ruben
patent: 3997244 (1976-12-01), Takano
patent: 4281906 (1981-08-01), Tanaka

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-1010702