Optical disc-shaped recording medium recording device and method

Details Optical disc-shaped recording medium recording device and method Optical disc-shaped recording medium recording device and method

1997-08-27

1999-04-27

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 48, 369124, G11B 700

Patent

active

058986561

ABSTRACT:
A driving device and a calibration method for an ablation write-once type optical disc in which the recording light volume can be calibrated accurately without using an over-power for positively recording data on the ablation write-once type optical disc. A playback output by an optical head 3 for recording/reproducing data by scanning an ablation write-once type optical disc 1 with a laser light beam is supplied to an optimum recording light volume decision unit 4. A light recording data controller 6 controls a laser driving controller 5 for controlling the laser light volume of an optical head 3 for recording two different recording patterns with different repetition periods with various recording light volumes. The optimum recording light volume decision unit 4 detects the asymmetry amount from the playback outputs of the two different recording patterns and determines an optimum recording light volume of the ablation write-once type optical disc 1 based on the asymmetry amounts at the various recording light volumes.

REFERENCES:
patent: 5455815 (1995-10-01), Ishida et al.
patent: 5563862 (1996-10-01), Udagawa
patent: 5715228 (1998-02-01), Takiguchi

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