| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a liquid crystal aberration correction device, with which optical axis deviation aberration produced by a deviation between an optical axis of an objective lens and that of a spherical aberration correcting device is appropriately corrected, and an optical head. <P>SOLUTION: The liquid crystal aberration correction device 4 corrects wave aberration of a light beam advancing to the objective lens, and has a liquid crystal molecule layer 24, a first electrode pattern 41-45 arranged on one surface of the liquid crystal molecule layer and a second electrode pattern arranged on the other surface thereof. The second electrode pattern has electrodes 31, 34 on the outside of an effective diameter of the objective lens, transparent electrodes 32a, 33b, 32b, 33a aligned along a moving direction of the objective lens, and a transparent electrode 35 with high resistance connecting them, wherein a pair of the transparent electrodes 32a and 33a and another pair of the transparent electrodes 33b and 32b are arranged in positions in which one is symmetrical to its counterpart in the pair with an optical axis of the liquid crystal aberration correction device interposed inbetween. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
