OPTICAL DISC IDENTIFICATION APPARATUS AND METHOD OF IDENTIFYING OPTICAL DISC

摘要

An optical disc identification apparatus is disclosed. The optical disc identification apparatus includes an optic pickup unit and a control unit. The optic pickup unit has a plurality of laser sources. The optic pickup unit emits any of lasers to the optical disc and detects the reflected laser from the optical disc to transduce the reflected laser to a detection signal. The control unit controls the optic pickup unit to activate any of the laser sources and moves an object lens of the optic pickup unit. When the object lens moves, the control unit obtains a sectional width value of an S-curve of a focus FE signal according to the detection signal. The control unit repeats above steps to obtain the sectional width values of the S-curves of all the laser sources and identifies the optical disc according to all the sectional width values.