Telephoto lens

Details Telephoto lens Telephoto lens

1979-08-28

1980-12-30

Sacher, Paul A.

G02B 960

Patent

active

042419832

ABSTRACT:
A telephoto lens comprising; a front lens group comprising a positive lens, a negative lens and positive lens arranged in the written order from the object side, and having a positive refracting power, and a rear lens group arranged with a large space from the front group, in which the positive lens is made of an anomalous dispersion optical material, and the negative lens is made of lanthanum glass, and the telephoto lens satisfies the following conditions: ##EQU1## wherein F is the focal length of the whole system, .phi.i is the refracting power of the i-th lens from the object side, and ri is the curvature radius of the i-th lens surface of the lens from the object side.

REFERENCES:
patent: 3774991 (1973-11-01), Shimizu
patent: 3854797 (1974-12-01), Yakota
patent: 3868174 (1975-02-01), Yakota

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4648