Patent ID: 7480215

Claim:
A device comprising: an optical storage medium drive; an optical storage medium comprising a plurality of data tracks; at least one access unit for reading out data from and writing data to said optical storage medium; a single light source arranged to produce at least one first light beam and at least one second light beam; optics arranged to transmit and guide said first light beam and said second light beam towards said data tracks of the optical storage medium; and a detector arranged to detect light beams that are reflected from the surface of the optical storage medium, wherein said access unit is arranged to pivot on one end at a pivot point in order to move three-dimensionally in relation to the pivot point, said optics and said detector are arranged to move in accordance with the movement of said access unit, said optics are arranged to guide said first light beam transversal directly to data tracks of the optical storage medium in accordance with the movement of said access unit, and said detector is arranged to receive the reflected beams of said first light beam or said second light beam from said data tracks of the optical storage medium in order to control the movement of said access unit.