Patent ID: 7701814
Filing Date: 2010-04-20
Classification: G11B

Abstract:
1. An optical pickup device which irradiates an optical disk with a recording/reproduction laser beam from a light source while tilting and horizontally actuating a lens holder which holds an objective lens, to thus record/reproduce information, the device comprising: a reflector which is provided in the lens holder and reflects a portion of the recording/reproduction laser beam guided from the light source to the lens holder; light detection means fixedly placed at a position where the amount of received reflected light for sensing, which is the recording/reproduction laser beam reflected by the reflector, changes in accordance with a tilt angle of the lens holder; and tilt angle acquisition means for acquiring a tilt angle of the objective lens based on the amount of received light detected by the light detection means, wherein the tilt angle acquisition means eliminates, from the amount of received light detected by the light detection means, changes in the amount of light received by the light detector attributable to horizontal actuation of the lens holder, to thus acquire a tilt angle.