Illuminating apparatus for photographic color enlarger

Details Illuminating apparatus for photographic color enlarger Illuminating apparatus for photographic color enlarger

1976-05-13

1977-10-11

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2776

Patent

active

040532224

ABSTRACT:
The color mixing compartment of illuminating equipment for a photographic enlarger includes two parts. The part adjacent the light-admitting surface is a truncated pyramid. The part adjacent the light-emerging surface is substantially a parallelepiped having side faces disposed substantially perpendicularly to the light-emerging surface. A diffusing plate having a substantially uniform thickness is arranged at the light-admitting and light-emerging surfaces of the mixing compartment.

REFERENCES:
patent: 2997389 (1961-08-01), Boon
patent: 3923394 (1975-12-01), Frankiewicz
patent: 3927941 (1975-12-01), Yamaguchi

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