| 摘要 |
<p>A track access control system in a rotating disc storage device including a rotatable disc having a plurality of tracks are formed in a direction of the rotation of the disc, and a movable head (2') which is movable in a radial direction across the disc by a head moving means for writing or reading data on said disc. The movable head (2') contains first and second optical beam outputting means (200, 200') for impinging first and second optical beams, the first optical beam outputting means (200) being located in a position preceding the second optical beam outputting means (200') in the direction of the rotation of the disc. Beam moving means (21'), mounted on said movable head (2'), are provided for moving an impinging position of said optical beams. Track error detecting means (26, 61) for detecting a deviation of the position of said optical beams on said recording disc, from its optimum on-track position are also provided. Driving control means (32c, 33b) are provided for outputting a control quantities to control the operation of said head moving means (81), and said beam moving means. <IMAGE></p> |
