Compact telephoto lens

Details Compact telephoto lens Compact telephoto lens

1980-03-03

1981-12-01

Corbin, John K.

G02B 934

Patent

active

043033148

ABSTRACT:
A compact telephoto lens comprises, in succession from the object side, a first lens which is a single positive lens having its surface of sharper curvature facing the object side, a second lens which is a positive meniscus lens having its convex surface facing the object side, a third lens which is a single negative lens having its surface of sharper curvature facing the image side, a stop, and a fourth lens which is a single positive lens having its surface of sharper curvature facing the object side. The telephoto lens satisfies specific conditions.

REFERENCES:
patent: 3018688 (1962-01-01), Hayes
patent: 3649104 (1972-03-01), Edwards et al.
patent: 4057330 (1977-11-01), Matui
patent: 4063802 (1977-12-01), Imai et al.

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