Gauss type photographic lens

Details Gauss type photographic lens Gauss type photographic lens

1982-02-03

1984-01-17

Corbin, John K.

350255, G02B 704, G02B 942

Patent

active

044261373

ABSTRACT:
A Gauss type photographic lens comprises, in succession from the object side, a first lens component of positive refractive power fixed relative to the image plane, a second lens component of negative refractive power fixed relative to the image plane, a third lens component of negative refractive power movable relative to the image plane, and a fourth lens component of positive refractive power movable relative to the image plane. The third lens component and the fourth lens component are movable by different amounts in the same direction for focusing.

REFERENCES:
patent: 2503789 (1950-04-01), Wood et al.
patent: 2537912 (1951-01-01), Raiss
patent: 3815974 (1974-06-01), Momiyama
patent: 3884557 (1975-05-01), Nakamura
patent: 4057329 (1977-11-01), Fleischman
patent: 4390252 (1983-06-01), Mori

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