MEHRLAGIGE OPTISCHE PLATTE MIT MODULATION DER SPURRILLE

A record carrier is for recording information by writing marks in a track. The record carrier has at least a first recording layer ( 40 ) and a second recording layer ( 41 ). Each layer has a pregroove ( 14 ) indicating the position of the track and exhibiting a wobble modulated for representing phy...

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Bibliographische Detailangaben
Hauptverfasser:	SPRUIT, JOHANNES, H., M, WOERLEE, PIERRE, H, KOPPERS, WILHELMUS, R, VAN DEN OETELAAR, RONALD, J., A, MARTENS, HUBERT, C., F
Format:	Patent
Sprache:	ger
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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Beschreibung
Zusammenfassung:	A record carrier is for recording information by writing marks in a track. The record carrier has at least a first recording layer ( 40 ) and a second recording layer ( 41 ). Each layer has a pregroove ( 14 ) indicating the position of the track and exhibiting a wobble modulated for representing physical address information. In addition the pregroove has a pregroove modulation ( 13 ) consituted by variations of a physical parameter related to the shape of the pregroove for encoding axiliary control information. In a scanning device the pregroove modulation is detected in the main detector signal by variations of the reflected radiation.