| 摘要 |
PROBLEM TO BE SOLVED: To always accurately reproduce any track of an optical disk recording medium in an optical reproducing device. SOLUTION: A light spot (d) from a semiconductor laser 10 is made to scan along a track by a polygon mirror 13. At the reproducing time, the polygon mirror 13 is rotated in synchronization with a reproducing clock (k) and the frequency of this reproducing clock (k) is changed in accordance with a linear velocity at each track. By this method, the light spot (d) is made to follow a recording mark. |
