Inverted telephoto type wide angle lens system

Details Inverted telephoto type wide angle lens system Inverted telephoto type wide angle lens system

1979-06-04

1981-03-31

Clark, Conrad J.

G02B 1304

Patent

active

042589851

ABSTRACT:
The inverted telephoto type wide angle lens system of the present invention includes, from the object to image side, a first lens group having a positive single lens, a first negative meniscus single lens convex to the object side and a second negative meniscus single lens convex to the object side. A second lens group includes at least one positive lens while a third lens group includes, from the object to the image side, a first positive meniscus single lens convex to the image side, a biconcave single lens, a second positive single lens convex to the image side and a positive single lens. In addition, the inverted telephoto type wide angle lens system of the present invention fulfills the following conditions:

REFERENCES:
patent: 3473832 (1976-08-01), Ogura
patent: 3862794 (1975-01-01), Fujii

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