Optical information recording medium and recording/reproducing method thereof
An optical information recording medium having two or more information layers, is characterised in that: information signals are recorded or reproduced by gathering laser beams in the information layers; the information layers which are closer to an incidence position of the laser beams than a fares...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | An optical information recording medium having two or more information layers, is characterised in that: information signals are recorded or reproduced by gathering laser beams in the information layers; the information layers which are closer to an incidence position of the laser beams than a farest information layer have a recording layer which is changed between two state capable of being optical detected, and 0 |
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