OPTICAL DISC MEDIUM

An erasable optical disc medium on which information is recorded and read by using a laser beam, which comprises (i) a phase transition type information recording layer (2), (ii) an optical interference layer (3) and (iii) an optical reflection layer (4), formed in this order on a transparent substr...

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Bibliographische Detailangaben
Hauptverfasser:	NAGAAKI KOSHINO, KENICHI UCHIUMI, YASUYUKI GOTO
Format:	Patent
Sprache:	eng
Schlagworte:	COLOUR PRINTING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LINING MACHINES PERFORMING OPERATIONS PHYSICS PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	An erasable optical disc medium on which information is recorded and read by using a laser beam, which comprises (i) a phase transition type information recording layer (2), (ii) an optical interference layer (3) and (iii) an optical reflection layer (4), formed in this order on a transparent substrate (1), in such a state that a reflectance of the medium is higher before information is recorded and a reflectance of the recorded portions of the medium is lower after recording. The erasable optical disc medium may be used in place of a standard CD medium, e.g. in a CD-ROM drive.