OPTICAL PICK-UP APPARATUS FOR AUTO-COMPENSATING TRACKING OFFSET

摘要

The tracking offset is provided an optical pickup device that is automatically corrected. The optical pick-up apparatus, composed of a plurality of the detection, and outputs an electrical signal corresponding to each of the plurality of light that is focused onto the detector, the direction parallel to the track direction of the optical detector and the optical disc to be used for correcting the tracking offset is divided into a left region and a right region relative to the optical disc of the optical disc that is the reflected light that is incident on the part of the portion of the left area and the right area, and that focusing on any one of the detector, incident on the rest of the rest of the left area and the right area so that the focusing of the reflected light in any of the other detection unit includes a hologram for splitting the light reflected by the optical disk. Thereby, the tracking offset that occurs in response to the movement of the objective lens can be obtained an effect that is automatically corrected. Therefore, a separate operation or calculation operation for correcting the tracking offset can be omitted.