| 摘要 |
PROBLEM TO BE SOLVED: To provide a cleaning device with a function of checking the operational state of an optical pickup for cleaning the objective lens of the optical pickup and for discriminating the operational state of the optical pickup being the heart part of the optical pickup device. SOLUTION: A disk 1 opposing to the objective lens 5 of an optical pickup is provided with a cleaning member 3. Digital signals 2 to check the operational state of the function of the optical pickup 4 are recorded and constituted in a specified region of the disk 1. |
