REDUCTION OF IMAGING ARTIFACT IN PLATESETTER HAVING DIFFRACTIVE MODULATOR

PROBLEM TO BE SOLVED: To minimize banding and other imaging artifacts. SOLUTION: A platesetter may have an optical imaging head which includes a diffractive modulator having individually controlled ribbons associated with individual pixels imaged onto a printing plate. One method for reducing artifa...

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Bibliographische Detailangaben
1. Verfasser:	NOLAN JOHN F
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PICTORIAL COMMUNICATION, e.g. TELEVISION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To minimize banding and other imaging artifacts. SOLUTION: A platesetter may have an optical imaging head which includes a diffractive modulator having individually controlled ribbons associated with individual pixels imaged onto a printing plate. One method for reducing artifacts transferred to a medium includes steps of: determining values of intensity versus pulse width variations for each ribbon of the modulator based upon empirical data; weighting the determined values according to a predetermined weighting factor dependent upon physical, optical, chemical and structural characteristics of a printing plate to yield an image on the printing plate having minimum visible artifacts; and applying the weighted values to ribbon drivers of the modulator. COPYRIGHT: (C)2006,JPO&NCIPI