MAGNETO-OPTICAL RECORDING MEDIUM AND METHOD FOR PREVENTING THE ERASING OF THE INFORMATION RECORDED ON THE MAGNETO-OPTICAL RECORDING MEDIUM

Disclosed is an optical recording medium having a vertical magnetization film on which information is recorded along with an optically readable sign indicating whether or not erasing of recorded information is permitted. Also disclosed is a system for recording information on the recording medium, w...

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Bibliographic Details
Main Authors HIDEKI HATANO, SAKASHI OTAKI, NORIKIYO TAJIRI, SHIGERU KATO, MIKIO KANAI
Format Patent
LanguageEnglish
Published 23.10.1985
Edition4
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:Disclosed is an optical recording medium having a vertical magnetization film on which information is recorded along with an optically readable sign indicating whether or not erasing of recorded information is permitted. Also disclosed is a system for recording information on the recording medium, whereby the erasing of the information recorded on the recording medium is inhibited or permitted in accordance with a sensed sign on the recording medium.
Bibliography:Application Number: GB19820016334