Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1992-07-28
1995-04-25
Young, W. R.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 13, 369 54, 369 58, 369116, G11B 700
Patent
active
054105277
ABSTRACT:
An information recording and reproducing apparatus includes: a recording device to record information to a recording medium such as a magnetooptic disc, optical disc, or the like; a reproducing device to reproduce the information recorded to this medium; and a controller to control the recording and reproducing devices on the basis of optimum recording and reproducing conditions for the recording medium which have preliminarily been recorded in a predetermined area of the medium. The recording device includes a laser beam generator or magnetic field generator. The reproducing device includes a laser beam generator. The controller controls a strength of the laser beam or magnetic field. With this apparatus, the recording and reproducing operations for the recording medium can always be performed in an optimum state, so that the reliability of the reproduced data is improved.
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English Translation of JP 59-60742.
Canon Kabushiki Kaisha
Young W. R.
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