Foward-oblique viewing optical system

Details Foward-oblique viewing optical system Foward-oblique viewing optical system

1977-02-04

1979-02-06

Corbin, John K.

350204, G02B 2302

Patent

active

041381920

ABSTRACT:
A forward-oblique viewing optical system for endoscopes comprising an observing-direction changing prism which has a surface for refracting rays from an object to be observed and is arranged in front of an objective, said optical system as a whole thereby being made compact.

REFERENCES:
patent: 1530081 (1925-03-01), Humbrecht et al.
patent: 1703215 (1929-02-01), Wappler
patent: 2678580 (1954-05-01), Erban
patent: 2783757 (1957-03-01), Scholz
patent: 3664730 (1972-05-01), Cardona
patent: 3833291 (1974-09-01), Samuelson
patent: 3918072 (1975-11-01), Imai et al.

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