A power adjustment method in which a modulation index is calculated from {HEAD ~ reproduced signals} of {TAIL ~ patterns} recorded by irradiating light onto an optical information recording medium with a recording power varied and an optimum power of irradiation light is set up using the modulation index 
A power adjustment method in which a modulation index is calculated from { HEAD ~ reproduced signals } of { TAIL ~ patterns } recorded by irradiating light onto an optical information recording medium with a recording power varied and an optimum power of irradiation light is set up using the modulation index
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