Record carrier with visual watermark on data area

Record carrier with visual watermark on data area

A record carrier (1) comprising a data area (3) with a pattern of substantially parallel tracks (2) for storing data. The record carrier (1) comprises at least first and second areas, the tracks in the first areas (4) comprising a first periodic deflection and the tracks in the second areas (5) comp...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: DE JONG PIETER W. T.,DE BOER JAN H
Format: Patent
Sprache:eng
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Beschreibung
Zusammenfassung:A record carrier (1) comprising a data area (3) with a pattern of substantially parallel tracks (2) for storing data. The record carrier (1) comprises at least first and second areas, the tracks in the first areas (4) comprising a first periodic deflection and the tracks in the second areas (5) comprising a second periodic deflection. A visual contrast between the respective areas is realized by a difference between the first and the second periodic deflection. The visual contrast represents a visual watermark.