Optical recording device for adjusting the rotation rate of recording medium during seeking operation

摘要

This invention provides an optical recording-reading device that prevents deterioration of the recorded signals on the optical recording medium caused by the optical beam, and the optical recording-reading device can store information safely. An optical recording-reading device comprises an optical head to produce an optical beam, a transfer board to move the optical beam, and a motor that rotates a disk optical recording medium having a recording thin film which changes its state due to the irradiation of the optical beam. Recording and reading are conducted at a relative velocity between the optical beam and the optical recording medium that is determined as a substantially constant linear velocity. The optical recording-reading device has a transfer control unit to control the movement of the optical beam, and rotation rate control unit to control the rotation rate of the optical recording medium. When the optical beam moves to seek on the optical recording medium, the relative velocity between the optical beam and the optical recording medium is maintained at a predetermined linear velocity or above by using the transfer control unit and the rotation rate control unit.