| 摘要 |
<p>A tracking system for positioning a light spot onto a magneto optic or optical disc having a beam guide track (100) preformatted thereon comprises a main light beam (a) and two auxiliary light beams (b,c), and a circuit for feeding a low frequency component of tracking error signals, detected by the respective auxiliary light beams (b,c), back to a tracking error signal detected by the main light beam (a).</p> |
