Illuminating apparatus with a light control channel for photogra

Details Illuminating apparatus with a light control channel for photogra Illuminating apparatus with a light control channel for photogra

1979-03-26

1980-10-14

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 75, G03B 2754, G03B 2762

Patent

active

042278040

ABSTRACT:
An illuminating system for use in a photographic enlarging apparatus having first and second light control channels is disclosed. The light control channels receive and transmit light from a light source; the light exit end of the first light control channel has a diagonal that is less than the longest side of the cross-section of the light entrance end of the second light control channel. A picture stage for receiving and supporting a negative to be projected is secured to the light exit end of the second light control channel. The second light control channel and the picture stage are mounted for unitary rotational movement about an axis normal to the plane of the negative.

REFERENCES:
patent: 606593 (1898-06-01), Stender
patent: 2236303 (1941-03-01), Skinner et al.
patent: 2510363 (1950-06-01), Anderson
patent: 3273451 (1966-09-01), Wilson
patent: 4077716 (1978-03-01), Gandini

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