| 摘要 |
To record a pit in an optical information record medium, the modulation depth of the record pit is compared with a predetermined threshold value and write light power corresponding to the modulation depth of a larger value than the threshold value and corresponding to the beta value closest to the target beta value, of the actually found values is determined appropriate write light power, whereby power calibration for optical disk DSK is conducted. Emission power (write light power) corresponding to the beta values in a predetermined range, of the actually found beta values and corresponding to the modulation depth of the largest value is determined appropriate write light power, whereby power calibration is conducted.
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