Patent ID: 7382698

Claim:
An optical information recording/reproducing apparatus comprising: a light source portion; an objective lens that gathers a pencil of light from the light source portion onto a recording medium; an optical system that guides a returning pencil of light from the recording medium onto a photodetector; means for generating a tracking error signal with respect to a predetermined track on the recording medium from the pencil of light guided onto the photodetector; means for performing tracking on the predetermined track on the recording medium based on the tracking error signal; means for generating a tilt detection signal by detecting a relative tilt between the recording medium and the objective lens from the pencil of light guided onto the photodetector; a tilt correction means for correcting the relative tilt between the recording medium and the objective lens based on the tilt detection signal; means for generating a predetermined signal recorded on the recording medium from the pencil of light guided onto the photodetector under a state where a tracking servo is not driven; and means for measuring a signal level of the predetermined signal, wherein the tilt correction means roughly corrects the relative tilt between the recording medium and the objective lens until the signal level reaches a threshold value determined in advance, and after the rough correction, under a state where the tracking means performs tracking on the predetermined track, the tilt detection signal generation means generates the tilt detection signal and the tilt correction means finely corrects the relative tilt between the recording medium and the objective lens based on the tilt detection signal.