| 摘要 |
<p>An apparatus and method for selectively positioning a read/write head (14) adjacent a record medium (10) on which optical guidelines (20) have been recorded for magnetically reading or writing data on one of a plurality of data tracks thereon. Each data track is associated with one of the optical guidelines (20) and may include an identification optically coded therein. The apparatus includes a light source (26) for illuminating the record medium (10) adjacent the read/write head (14), and a light detector system (28) for detecting light reflected (46) from one of the optical guidelines (20). A servo mechanism (60) adjusts the position of the read/write head (14) responsive to reflected light (46) detected by the light detector system (28). Since the track information is recorded optically on the record medium (10), this allows for optical sensing which is most accurate and does not interfere with the magnetic reading/writing function of the head (14), and the medium is capable of carrying more magnetically recorded data information than conventional media of the same size.</p> |
