OPTICAL RECORDING/REPRODUCING DEVICE

摘要

PROBLEM TO BE SOLVED: To realize the cancel of crosstalk for recording/reproducing disks different in track pitch and also to perform stable tracking control. SOLUTION: An optical pickup is provided with a diffraction grating for forming a sub-beam in the optical path of a light beam, and a diffraction grating moving mechanism for moving the diffraction grating based on an electric signal from the outside.