Apparatus for recording data on a disc-shaped optically readable

Details Apparatus for recording data on a disc-shaped optically readable Apparatus for recording data on a disc-shaped optically readable

1989-07-25

1997-10-28

Hindi, Nabil

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 58, 369 59, 369 4413, 369 48, G11B 700

Patent

active

056823657

ABSTRACT:
Disclosed is a record carrier for optically detectable data storage, apparatus for manufacturing such a record carrier and apparatus for recording and/or reproducing information on such a record carrier. The record carrier is provided with periodic track variations whose period corresponds to a frequency for which the power spectrum of the digitally coded information substantially exhibits a zero point. When scanned by a beam of radiation, the periodic track variations produce periodic modulation in the beam of a frequency corresponding to the period of the track variations in order to generate a clock signal of a frequency equal to the bit frequency during recording or reproduction.

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