Zoom lens

Details Zoom lens Zoom lens

1981-08-03

1984-03-27

Corbin, John K.

350423, G02B 964, G02B 1518

Patent

active

044390173

ABSTRACT:
In the compact zoom lens disclosed, a first lens group of positive power includes a negative lens and two positive lenses movable for focusing, a second lens group has a negative refractive power, a positive third lens group has a positive lens and a negative lens, with the image magnification variation being effected by the second and third lens groups, a positive fourth lens group constitutes an image forming section. The relations

REFERENCES:
patent: 4025167 (1977-05-01), Ikeda
patent: 4189213 (1980-02-01), Iizuka
patent: 4240699 (1980-12-01), Sato et al.
patent: 4350416 (1982-09-01), Iishiyama

Affiliated with

Also associated with

Rating

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.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1752090