| 摘要 |
PROBLEM TO BE SOLVED: To solve the problems such as large fluctuation in light quantity of a laser beam and destruction of information in a recorded recording layer caused by scattering and absorption when the laser beam passes through the recorded recording medium. SOLUTION: With respect to the direction to which a laser beam is made incident, information is reversely recorded in two or more three-dimensionally arranged recording layers where the laser beam sequentially arrives, consequently, only the light quantity fluctuates by the laser beam passing through the two or more recording layers without destructing the information recorded in the recording layers. COPYRIGHT: (C)2007,JPO&INPIT
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