Optical information recording method
AssigneesHitachi Consumer Electronics Co., Ltd., Hitachi-LG Data Storage, Inc.
InventorsKoichi Watanabe, Kimio Nakamura
Life of this patent
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Abstract
To solve the problem of deterioration in recording quality due to a change of a write waveform caused by changes of temperature and recording powers, aged deterioration and the like. A driver having a function of controlling rise/fall times and an overshoot amount of an optical waveform is used to optimize an optical waveform that changes in recording under the influence of a component of a laser and the like. Specifically, the rise/fall times and the overshoot amount of the optical waveform are optimized by obtaining a waveform control register value from test recording or a table.
Claims8
An optical information recording method for recording information by emitting a pulsed laser beam from a laser light source and thereby forming a recording mark on a recording medium, the method comprising the steps of:
- optimizing a recording power;
- performing test recording on the recording medium while substantially changing a light-emission pulse by changing a value set in a waveform control register of a laser driver which drives the laser light source and thus by changing a shape of a current pulse with which the laser light source is driven;
- reproducing information recorded in the test recording;
- obtaining an optimal value of the value set in the waveform control register, on the basis of a relationship between the value set in the waveform control register and a recording quality;
- setting the optimal value in the waveform control register;
- and
- recording information by forming a strategy with a pulsed laser beam generated from the laser light source driven by the laser driver.
An optical information recording method for recording information by emitting a pulsed laser beam from a laser light source and thus by forming a recording mark on a recording medium, the method comprising the steps of:
- acquiring information on temperature, a recommended recording power of the recording medium and a differential resistance of the laser light source to be used;
- obtaining a register value corresponding to the acquired information, by referring to a table in which a register value to be set in a waveform control register of a laser driver which drives the laser light source is stored in association with a combination of the temperature, the recording power and the differential resistance of the laser light source;
- setting the obtained register value in the waveform control register of the laser driver;
- and
- recording information by forming a strategy with a pulsed laser beam generated from the laser light source driven by the laser driver.
Dependencies are inferred from the claim text.