| 摘要 |
<p>An information recording medium comprising:
a first recording layer to record therein first information which is at least one portion of record information; and
one or a plurality of second recording layers, which are disposed on said first recording layer, to record therein second information which is at least another portion of the record information, wherein
each of said second recording layers has a predetermined area in which power calibration is performed to detect an optimum recording power of laser light for recording, which is transmitted through said first recording layer and other layers of said second recording layers, said first recording layer, the other layers of said second recording layers, and said each of said second recording layers arranged in this order as viewed from an irradiation side of the laser light, and
in a facing area, which faces the predetermined area, in the other layers of said second recording layers and said first recording layer, by forming embossed pits, light transmittance of the facing area is made closer to (i) light transmittance under an assumption that (i-1) the embossed pits are not formed and that (i-2) the other layers and said first recording layer are already recorded, as compared to (ii) light transmittance under an assumption that (ii-1) the embossed pits are not formed and that (ii-2) the other layers and said first recording layer are unrecorded.</p> |
