Retrofocus wide angle objective lens system

Details Retrofocus wide angle objective lens system Retrofocus wide angle objective lens system

1975-08-26

1977-09-06

Corbin, John K.

G02B 1304

Patent

active

040464598

ABSTRACT:
A retrofocus wide angle objective lens system of seven air-spaced lenses, the first and second lenses, counting in the order of the entrant light beam, being negative meniscus lenses of forward convexity, the third lens being a positive lens, the fourth lens being a bi-convex lens, the fifth lens being a bi-concave lens, and the sixth and seventh lenses being positive lenses. The third and fourth lenses are separated by a large axial air space, and the third lens has a larger diameter than the fourth lens.

REFERENCES:
patent: 3507559 (1970-04-01), Mori
patent: 3856385 (1974-12-01), Takahashi
patent: 3874770 (1975-04-01), Skimizu

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2160096