Electrophotographic halftone printing machine employing a phase

Details Electrophotographic halftone printing machine employing a phase Electrophotographic halftone printing machine employing a phase

1975-03-07

1977-01-18

Moses, R. L.

Photocopying

Including fiber optics

355 32, G03G 1501

Patent

active

040036499

ABSTRACT:
Apparatus for optically imaging a halftone pattern on a xerographic photoreceptor to produce color copies of a color original. The apparatus includes a phase screen for providing a predetermined halftone pattern, the screen producing substantially the same pattern at the same spatial frequency over the visible light spectrum.

REFERENCES:
patent: 2598732 (1952-06-01), Walkup
patent: 3120790 (1964-02-01), Carlson et al.
patent: 3152528 (1964-10-01), Pendry
patent: 3212889 (1965-10-01), Gundlach et al.
patent: 3248216 (1966-04-01), Weigl
patent: 3337339 (1967-08-01), Snelling
patent: 3497296 (1970-02-01), Faw
patent: 3535036 (1970-10-01), Starkweather
patent: 3540806 (1970-11-01), Starkweather
patent: 3914040 (1975-10-01), McVeigh

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