| 摘要 |
PURPOSE:To retrieve stably in high speed a desired track by constituting that the 1st moving means is not fluctuated even if the 2nd moving means is moved in high speed in retrieving the desired track. CONSTITUTION:In retrieving the desired track, an information processing controller 24 opens a switch 15 to make the tracking control and the moving control inoperative, short-circuits the switch 23 so as to transmit a signal of a signal generating circuit 28 to a synthesizing circuit 21 and let an acceleration detecting circuit 19 output a moving accelerating signal of a moving plate 12. A linear motor 13 moves in high speed the moving plate 12 in response to the signal of the signal generating circuit 28. The signal from the acceleration detecting circuit 19 is transmitted to a tracking element 10 so as not to fluctuate the tracking element 10. When a light beam 2 comes onto the desired track, the information processing controller 24 opens the switch 23 so as to stop the linear motor 13 and so as not to transmit a moving acceleration signal of the moving plate 12 to the tracking element 10. |
