Photocopying – Projection printing and copying cameras – Multicolor picture
Patent
1985-12-10
1987-01-27
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
Multicolor picture
250578, 350355, 346160, 355 71, 355 77, 358 75, G03B 2772, G03B 2776
Patent
active
046391274
ABSTRACT:
Apparatus is described for exposing a layer of photosensitive material to form an image thereon, by passing the photosensitive layer under a row of closely spaced light shutter apertures which are selectively opened and closed. The total light falling on each pixel area at the photosensitive layer is increased by using apertures which are long and thin, and concentrating the light passing therethrough onto a pixel at the photosensitive layer. Two rows of staggered apertures are used. The photosensitive layer is on a transparent substrate, and a reflector lies on a side of the substrate opposite the light apertures, so light passing through the photosensitive layer and substrate is reflected back through the layer to pass twice therethrough. The entire sheet is pre-exposed to light of a level less than a threshold, with the light subsequently passing through each light aperture being sufficient to raise the total exposure beyond the threshold.
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Beery Jack
Broome Barry G.
ITT Corporation
May J. M.
Peterson T. L.
Wintercorn Richard A.
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