Wide angle objective lens system

Details Wide angle objective lens system Wide angle objective lens system

1978-11-07

1980-07-08

Clark, Conrad J.

G02B 1130

Patent

active

042114721

ABSTRACT:
A compact wide angle lens system for use in a camera having a range finder is provided. The lens system is of five-group, seven-element type comprising, consecutively from the object to the image side, a first lens group consisting of a negative meniscus single lens convex to the object side, a second lens group consisting of a positive doublet having a cementing surface concave to the object side, a third lens group consisting of a negative meniscus single lens concave to the object side, a fourth lens group consisting of a positive doublet, and a fifth lens group consisting of a negative meniscus single lens concave to the object side.

REFERENCES:
patent: 3132199 (1964-05-01), Zimmerman
patent: 3492064 (1970-01-01), Hoogland
patent: 3591257 (1971-07-01), Mandler
patent: 3601473 (1971-08-01), Mandler

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