Wide angle retrofocus lens system

Details Wide angle retrofocus lens system Wide angle retrofocus lens system

1978-03-29

1979-11-06

Sacher, Paul A.

350176, G02B 964

Patent

active

041733959

ABSTRACT:
A wide angle retrofocus lens system comprises, in order from the object side to the image side, a first negative meniscus lens having a convex surface facing the object, a second positive double convex lens, a third negative meniscus lens having a convex surface facing the object, a fourth either positive or negative meniscus lens having a concave surface facing the object, a fifth either positive meniscus lens having a convex surface facing the object or positive double convex lens, a sixth negative lens, a seventh positive meniscus lens having a concave surface facing the object, and an eighth lens unit comprising a double concave lens on the object side and a double convex lens on the image side cemented together to form a positive lens. The overall lens system satisfies the following conditions: ##EQU1## wherein: f is the focal distance of the overall lens system,

REFERENCES:
patent: 3740120 (1973-06-01), Ruhl
patent: 4111558 (1978-09-01), Ikemori

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-459828