Photocopying – Projection printing and copying cameras – Multicolor picture
Patent
1989-01-27
1990-06-19
Braun, Fred L.
Photocopying
Projection printing and copying cameras
Multicolor picture
355 71, 355211, 355229, 355326, G03B 2772, G03G 500, G03G 1501, G03G 1504
Patent
active
049357700
ABSTRACT:
A document imaging system is disclosed which utilizes a tungsten halogen document illumination lamp in conjunction with a arsenic triselenide photoreceptor. The spectral sensitivity of the lamp and photoreceptor are matched by inserting a yellow filter into the optical path. The filter matches the spectral intensity at the blue end of the wavelength spectrum.
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Frederick Purves et al., "The Focal Encyclopedia of Photography", The Macmillan Company: New York, 1960, p. 457.
Braun Fred L.
Smith Matthew S.
Xerox Corporation
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