| 摘要 |
<P>PROBLEM TO BE SOLVED: To keep each light quantity during recording in desired light quantity even when differential efficiency of a light emitting element changes by being applied, for example, in a phase transmission type optical disk recording/reproducing device with respect to an optical pickup, a recording/reproducing device and a light quantity control method of a recording/reproducing device. <P>SOLUTION: The light quantity of laser beams is controlled by a feedback loop to monitor a change in an output voltage of a loop filter provided in the feedback loop, thereby correcting the quantity of outgoing light of the laser beams. <P>COPYRIGHT: (C)2009,JPO&INPIT |
