Patent ID: 8355308

Claim:
An optical recording medium having three or more recording layers comprising: a basic recording layer arranged in a position that is in the range of 90 μm to 110 μm away from a light incident surface, with information being read from the basic recording layer by the irradiation of laser light from a laser light source that is incident on the light incident surface; and a plurality of recording layers arranged in parallel with the basic recording layer, with information being read from the recording layer by the irradiation of the laser light that is incident on the light incident surface through an objective lens with the same numerical aperture NA, from the same laser light source having the same wavelength, wherein all of the basic recording layer and the plurality of recording layers are compliant with the Blu-ray Disc standards and a Blu-ray Disc-format to provide Blu-ray Disc-formatted recording layers; and any one of the basic recording layer and the plurality of Blu-ray Disc-formatted recording layers has numerical values of position information of the plurality of Blu-ray Disc-formatted recording layers, which are recognized by a reading apparatus in advance collectively.