| 摘要 |
An optical disk drive device 100 includes: a tray 2 provided with an outer disk tray on which an optical disk is mounted; an electrode provided on the outer disk tray; an electrostatic capacitance sensor unit 3 configured to sense electrostatic capacitance between the electrode and an optical disk mounted in proximity to the electrode; a storage unit 4 configured to store a table that identifies electrostatic capacitance between each of different types of optical disks and the electrode occurring when the optical disk is mounted in proximity to the electrode; and a determination unit 5 configured to determine the type of the optical disk mounted on the tray, based on a sensor result obtained by the electrostatic capacitance sensor unit 3 and the table.
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