| 摘要 |
<p>An optical recording device includes an optical pickup (2), an asymmetry detection circuit (5), and a microcomputer (6). The optical pickup (2) corrects an aberration of an object lens based on an aberration correction value using a liquid crystal panel (41) in the optical pickup, irradiates a laser beam of multiple stages of recording powers on an optical disk to form marks, and then reproduces the formed marks with a reproduction power. The asymmetry detection circuit (5) detects amplitudes of RF signals of the marks reproduced by the optical pickup (2), calculates amplitude central values such that asymmetry takes a predetermined value, and determines an optimum recording power. The microcomputer (6) performs spherical aberration correction to change a spherical aberration correction value from an initial value such that the optimum recording power takes a minimum value.</p> |
