| 摘要 |
PURPOSE:To easily exchange a cleaning member and to safely clean an optical system without any trouble for making the device thin and compact by cleaning an objective lens by the rotation of the cleaning member due to the rotation of a disk motor. CONSTITUTION:When a case 10 is inserted to the main body of the device, the case is fixed to a holder 12 and a rotary body 14 is loaded on a disk table 15. When the power source of the motor is turned on, a disk motor 22 is rotated at low speed and with the turn of the disk table 15, the rotary body 14 is rotated. On the other hand, an objective lens 18 is simultaneously moved vertically forcedly by the operation of an actuator for focusing. The rotation of the rotary body 14 is transmitted through a belt 19 to a supporting part 16c of a cleaning member 16. Thus, the cleaning member 16 is rotated around a projecting shaft part 16a, the cleaning part 16d slides and contacts the vertically moving objective lens 18 by this rotation and dust stuck onto the objective lens 18 is removed. |
