Patent ID: 7990827

Claim:
An optical disc device comprising: a light source; an objective lens condensing on a recording layer of an optical disc an optical beam emitted from the light source; an actuator displacing the objective lens in a direction approaching or separating from the optical disc; an optical detection part receiving reflected light reflected by the optical disc; a pull-in signal generation part generating a pull-in signal as a sum signal of the reflected light from an electrical signal detected by the optical detection part; an RF signal generation part generating an RF signal as a reproduced signal from the electrical signal detected by the optical detection part; and a control part causing processing of determining a type of the optical disc to be executed, wherein the processing caused by the control part to be executed includes: signal acquisition processing moving the objective lens in the direction approaching the optical disc or in the direction separating from the optical disc to acquire the pull-in signal and the RF signal; and determination processing deciding, based on the RF signal acquired in the signal acquisition processing, whether or not to correct amplitude of the pull-in signal acquired in the signal acquisition processing, and then determining the type of the optical disc by using either of: the amplitude of the acquired pull-in signal and a correction value with which the amplitude of the acquired pull-in signal is corrected by using a predetermined value obtained from the acquired RF signal.