VIBRATION DETECTOR AND OPTICAL DISK DEVICE HAVING THE SAME

PROBLEM TO BE SOLVED: To provide a vibration detector capable of detecting vibration of an optical disk device without using other sensor such as a vibration sensor and not to inhibit cost reduction and miniaturization of the device and the optical disk having the vibration detector. SOLUTION: When the optical disk device 1 is vibrated in accordance with rotation of a disk 2, the vibration of the optical disk 1 is detected by detecting induced electromotive force to be generated from coils of an actuator and a motor provided inside the optical disk drive such as a coil 24 for focusing servo provided in an optical pickup 20. The cost reduction and the miniaturization of the device are enabled since necessity of elements such as the vibration sensor used for the conventional optical disk device is eliminated by using such structure.