COMPATIBLE LIGHT-MAKING DISH

A compatible optical disk from which information can be reproduced by a player normally used exclusively for reproduction, and on which writing, rewriting and erasure can be performed, comprises a recording film material characterized in that the reflectivity of a flat portion of the disk is lower t...

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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:	A compatible optical disk from which information can be reproduced by a player normally used exclusively for reproduction, and on which writing, rewriting and erasure can be performed, comprises a recording film material characterized in that the reflectivity of a flat portion of the disk is lower than 50% in an erased or unrecorded state and the reflectivity of a recorded area is increased on recording by irradiation of light. A light beam-guiding groove (12) is formed on the surface of the disk substrate so that information is recorded or read out along the trough portion (12) or crest portion (17) of the guiding groove, and the reflectivity is enhanced in the crest portion (17) between the troughs or in the trough portion (12) between the crests.