Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Patent
1979-03-28
1981-12-29
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
430 7, 430321, 430396, 355125, 358283, 358298, G03F 500, G03B 2776
Patent
active
043083269
ABSTRACT:
A computer-generated halftone contact screen is disclosed which consists of a rectangular array of small abutting square areas each of uniform transmittance (density), in which the transmittance (density) of the squares is described by a random variable whose distribution is controlled to give the screen a desired reproduction curve. The facsimile produced using the screen, its equivalent produced by computer-assisted means, and its representation in computer memory are disclosed.
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