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