Compact photographic lens with large aperture

Details Compact photographic lens with large aperture Compact photographic lens with large aperture

1978-03-28

1981-01-27

Sacher, Paul A.

G02B 962

Patent

active

042471710

ABSTRACT:
The present invention relates to a Gauss type lens, comprising a first positive meniscus lens whose convex surface is directed to the object, a second positive meniscus lens whose convex surface is directed to the object, a third negative meniscus lens whose convex surface is directed to the object, a fourth negative meniscus lens whose concave surface is directed to the object, consisting of a negative and a positive lens cemented on each other, the fifth positive meniscus lens whose concave surface is directed to the object and the sixth positive lens and satisfying the following conditions.

REFERENCES:
patent: 3743387 (1973-07-01), Nakagawa
patent: 3851953 (1974-12-01), Nakagawa
patent: 3984155 (1976-10-01), Nakagawa
patent: 4099843 (1978-07-01), Imai
patent: 4110007 (1978-08-01), Ikeda

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