1980-09-02
1983-05-31
Corbin, John K.
350446, G02B 914
Patent
active
043858090
ABSTRACT:
A copying lens system of three lenses is provided in which the total length is less than 0.15f with aberration fully corrected. This is brought about by a three-lens system in which the first lens is a positive meniscus whose convex surface faces the object side, a negative second lens with a concave surface at both ends, and a positive third lens with a convex surface at both ends, the rear surface being a reflection surface. The dimension of the lenses must satisfy the following condition:
REFERENCES:
patent: 4173396 (1979-11-01), Yokota
Kitagawa Masamichi
Yokota Minoru
Bierman Jordan B.
Bierman Linda
Corbin John K.
Gass Rebecca D.
Konishiroku Photo Industry Co,., Ltd.
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