| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multilayer optical disk easily focusing on a desired recording layer in the multilayer optical disk having three or more recording layers. <P>SOLUTION: Reflectance of each recording layer is set so that a ratio of reflectance of a desired recording layer to the reflectance of another recording layer is a prescribed value or more on the basis of the reflectance of the other recording layer. <P>COPYRIGHT: (C)2009,JPO&INPIT |
