| 摘要 |
PURPOSE:To always and accurately record and reproduce data even on any track of an optical disk recording medium, in a magneto-optical disk recording and reproducing device. CONSTITUTION:A light spot (d) outgoing from a semiconductor laser 10 is scanned in a direction along the track by a polygon mirror 13. At a recording time, the polygon mirror 13 is rotated synchronizing with the recording data (a), and further, the frequency of a recording clock (1) controlling timing for generating the recording data (a) is switched according to linear velocities in respective tracks. Thus, the light spot (d) is allowed to follow up the linear velocities of the optical disk recording medium 23. At a reproducing time, the polygon mirror 13 is rotated synchronizing with a reproducing clock (k), and the frequency of the reproducing clock (k) is switched according to the linear velocities in respective tracks. Thus, the light spot (d) is allowed to follow up a recording mark. |
