Patent ID: 8000199

Claim:
An optical disk apparatus to record data on an optical disk on which a wobble is formed, the optical disk apparatus comprising: a detection unit including a band-pass filter through which a signal obtained from a reflected light from an optical disk passes, the detection unit to detect a wobble signal from a wobble based on the signal which passes through the band-pass filter; a register to store an adjustment value for adjusting the band-pass filter as a register value; an acquisition unit to adjust the band-pass filter based on each of register values obtained by changing the register value 1 LSB by 1 LSB, and acquire an amplitude of the signal which passes through the band-pass filter, the amplitude corresponding to each of the obtained register values; an identification unit to identify one of the register values for the amplitude acquired by the acquisition unit to be largest; and an adjustment unit to adjust the band-pass filter based on a value obtained by adding 1 LSB to the register value identified by the identification unit when data is recorded.