| 摘要 |
An optical information recording/reproducing apparatus which records, reproduces or erases information by irradiating a disk-like optical information recording medium, supported on a turn table, with a plurality of beam spots through an optical system. A mechanism for moving the turn table in a direction substantially perpendicular to a tracking direction which extends radially from an axis of the information recording medium and intersects at least one of the beam spots, is used to effect tracking adjustment of the beam spots. A mechanism for rotating the plurality of beam spots on the optical axis of the optical system is also used in combination with the turn table moving mechanism to extend the range of tracking adjustment of the plurality of beam spots.
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