| 摘要 |
PURPOSE:To highly accurately recording and reproducing information by forming an abutting part between an optical pickup and a moving body on the outer periphery of a virtual cylinder formed by setting up a straight line passing almost the center of an objective lens and rectangular to the moving direction of a moving body as its center. CONSTITUTION:A disk 1 is mounted on a turntable 4 by a loading mechanism, the disk 1 is also rotated in accordance with the rotation of a spindle motor 3, and when the prescribed rotational frequency is obtained, a signal can be reproduced. When a motor 26 is rotated, a pulley 27 is also rotated and the optical pickup 5 is moved in a direction A by the rotation of the motor 26 in a direction P. Thus, the pickup 5 is sent to an optional position by controlling the rotating direction and rotational frequency of the motor 26, a laser beam is radiated from the objective lens 5a to the disk 1 at each position, and information can be read out from the disk 1 by the reflected light.
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