Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1996-12-09
1998-09-08
Tran, Thang V.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 50, G11B 700
Patent
active
058055460
ABSTRACT:
A recording device for a disc-like recording medium having some recording tracks formed by grooves wobbled in response to their absolute positional information and the track including a linking area for controlling laser power, the recording device comprising an information reader for reading information from the disc-like recording medium, a frequency information extractor for extracting groove frequency information from information extracted by the information reader, a frequency measurer for measuring the frequency of the frequency information extracted by the frequency information extractor, a recorder for performing a recording operation in respect to the disc-like recording medium, a discriminator for discriminating whether a rotating speed of the disc-like recording medium has reached a suitable rotation velocity or not, and a controller for controlling a laser power at the linking area in advance for a recording operation if the rotating speed has reached a suitable rotation velocity in accordance with a result of the discriminator.
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Sony Corporation
Tran Thang V.
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