Device for document filming

Details Device for document filming Device for document filming

1974-06-24

1976-03-30

Hix, L. T.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 70, G03B 2774, G03B 2776

Patent

active

039471128

ABSTRACT:
A document photographing device has a surface for supporting a document to be photographed, a camera positioned about the surface, to receive light reflected from and transmitted by a document supported on the surface, and separate means for illuminating the document from above and below respectively. An exposure meter receives light reflected from or transmitted through the document and indicates when correct exposure conditions have been set. The exposure meter includes correction means for correcting the reading of the exposure meter to take account of the different spectral radiation characteristics of the illuminating means.

REFERENCES:
patent: 2201606 (1940-05-01), Bing
patent: 2472381 (1949-06-01), McMaster
patent: 2857555 (1958-10-01), Koer et al.
patent: 3402636 (1968-09-01), Gemmer et al.
patent: 3606552 (1971-09-01), Ambrosius

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