| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve a recording quality margin by correcting a recording condition in real time with respect to a medium different in recording characteristic between inner and outer circumferences. <P>SOLUTION: Detection and correction where the adjustment causes of power and pulse width are separated are performed by using an mT pulse having a length m'T as the pulse for controlling the power and using an nT pulse having a length n'T as the pulse for controlling the pulse width. A recording pulse string including the mT pulse and nT pulse is irradiated against the medium 500 through the use of a laser beam 20A for recording. The pit and space formed by the irradiation of the recording pulse string are reproduced by using a laser beam 20E for reproducing. Then the influences of the power and the pulse width are independently detected, so that the power correction of the mT pulse and the width correction of the nT pulse are performed in real time. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
