| 摘要 |
<p>A multi-layer optical disk provided with a plurality of information recording layers for recording and/or reproducing information by an optical head. The plurality of information recording layers are stacked via intermediate layers, each information recording layer having a meandering track groove. The configuration elements (meandering amount (W1, W2), track groove depth and/or side-surface inclination angle) of a track groove in at least one information recording layer, out of the plurality of information recording layers, are different from those of track grooves in the other recording layers, whereby enabling the reproduction of satisfactory signals from each information recording layer.</p> |
