Copying lens

Details Copying lens Copying lens

1978-05-18

1979-11-06

Sacher, Paul A.

G02B 960

Patent

active

041733967

ABSTRACT:
In a lens system of five groups of five lens elements in which a front group of two lens elements and a back group of two lens elements are symmetrically arranged on either side of a biconvex lens centrally located therebetween, a copying lens characterized in that the lens elements in sequence from the object comprise a first lens having a positive meniscus configuration with its convex surface directed toward an object, the second lens having a biconcave configuration, a third lens having a biconcovex configuration, a fourth lens having a biconcave configuration and a fifth lens having a positive meniscus configuration with its convex surface being directed toward the image and in which the condition

REFERENCES:
patent: 2338614 (1944-01-01), Aklin
patent: 2430150 (1947-11-01), Warmisham
patent: 3133983 (1964-05-01), Rickless et al.
patent: 3609013 (1971-09-01), Kawazu
patent: 3672748 (1972-06-01), Doi et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-459849