Photocopying – Projection printing and copying cameras – Illumination systems or details
Patent
1995-12-18
1999-04-20
Moses, R. L.
Photocopying
Projection printing and copying cameras
Illumination systems or details
355 77, 355 67, G03B 2772
Patent
active
058961895
ABSTRACT:
The invention is directed to photographic flashing during photographic enlarging, when areas requiring darkening can be seen and selectively flashed and provides a photographic enlarger, a photographic negative, a photographic printable substrate, and the auxiliary light source of the present invention. Photographic enlarging of the photographic negative is conducted by emitting light from the photographic enlarger and printing an enlarged photographic image from the photographic negative onto the photographic printable substrate. The auxiliary light source includes controls, which are preferably independently adjustable, for varying (a) light intensity, (b) the area of projected light, (c) contrast, when used with variable contrast enlarging paper, and (d) color hue and density, when used in color enlarging from color negatives. The requisite size, intensity, and contrast or color hue and density of auxiliary light for photographic flashing is added during the photographic enlarging of the photographic negative. This is done by adjusting (a) light intensity, (b) the area of projected light, (c) contrast, when used with variable contrast enlarging paper, and (d) color hue and density, when used in color enlarging from color negatives, of the light being emitted from the auxiliary light source.
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