| 摘要 |
<p>A device for driving an object lens that optically reads information recorded on a rotating disk. A lens holder (2) is held on an intermediate holder (71) by means of four first metal wires (61), and the intermediate holder (71) is held on a fixed part (72) by means of four second metal wires (62). The sensitivity to the acceleration acting on the lens holder (2) increases in the different frequency bands of disk rotation corresponding to the different resonance frequency bands associated, respectively, with the first free vibration system composed chiefly of the first metal wires (61) and the second free vibration system composed chiefly of the second metal wires (62). Thus, the sensitivity of an optical tracking spot to displacements of the information tracks increases in at least two frequency bands of disk rotation.</p> |
