Two-stage exposure device for watermarking film

An apparatus (20) forms a latent indicium onto a sensitized medium, using an area energy source (26) for applying a substantially uniform sensitizing energy over an area of the sensitized medium and a pixel exposure source (30) for applying radiant energy to expose a pattern of pixels (14) onto the...

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Bibliographische Detailangaben
Hauptverfasser:	HEATH JOHN A, MACKENZIE SCOTT P, ZOLLA ROBERT J, POWERS THOMAS F, JONES PAUL W
Format:	Patent
Sprache:	eng
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM AUXILIARY PROCESSES IN PHOTOGRAPHY CALCULATING CINEMATOGRAPHY COMPUTING CORRECTION OF TYPOGRAPHICAL ERRORS COUNTING ELECTROGRAPHY HANDLING RECORD CARRIERS HOLOGRAPHY i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME LINING MACHINES PERFORMING OPERATIONS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PRESENTATION OF DATA PRINTING RECOGNITION OF DATA RECORD CARRIERS SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	An apparatus (20) forms a latent indicium onto a sensitized medium, using an area energy source (26) for applying a substantially uniform sensitizing energy over an area of the sensitized medium and a pixel exposure source (30) for applying radiant energy to expose a pattern of pixels (14) onto the area of the sensitized medium for forming the indicium.