| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tracking method capable of obtaining a correct tracking adjusting position when an optimal tracking position is changed during tracking adjustment or an optimal adjusting position is mistaken due to noise or the like. <P>SOLUTION: During tracking adjustment, a maximum ENV(envelope value) is compared with the ENV of a best position in a step S13. When a difference between the two values is equal to or more than a prescribed value, tracking adjustment is carried out again. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
