| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the deterioration of a recording/reproducing signal caused by AC tilting which cannot be corrected by a liquid crystal device due to the variation of the posture of a movable body, or the deterioration of control performance caused by unnecessary resonance which is caused when an objective lens is driven in a focusing direction or a tracking direction. <P>SOLUTION: The driving signal of a liquid crystal is superimposed on a focusing driving signal and a tracking driving signal and supplied to a movable body, separated by a frequency band on the movable body, and applied to the liquid crystal device. Thus the supply of driving signals to the movable body is performed through four wires. Consequently, an aberration correction function having no deterioration of aberration correcting capability caused by the movement of an objective lens in a tracking direction T is realized by mounting the liquid crystal device on the movable body, and signal is supplied through the four wires as in the conventional case. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
