Optical recording medium

An optical recording medium is described having a grooved recording layer. The structure of unwritten tracks must enable a scanning device to derive a radial tracking error signal according to the push-pull method. The structure of the written tracks must enable the scanning device to derive a radia...

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Bibliographic Details
Main Authors DUCHATEAU, JOHAN PHILIPPE WILLIAM BEATRICE, SPRUIT, JOHANNES HENDRIKUS MARIA
Format Patent
LanguageEnglish
Published 21.09.2001
Edition7
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:An optical recording medium is described having a grooved recording layer. The structure of unwritten tracks must enable a scanning device to derive a radial tracking error signal according to the push-pull method. The structure of the written tracks must enable the scanning device to derive a radial tracking error signal according to the high-frequency phase-detection method. To this end the depth of the groove is in the range from 1/24 to 1/7 times the wavelength for scanning the recording medium, and the phase difference between a radiation beam reflected from a region on track in between written marks and from a mark.
Bibliography:Application Number: TW19970118670