| 摘要 |
<p>Provided is an optical information recording medium for realizing an excellent superhigh-resolution image-reproduction while performing a high-speed reproduction. The optical information recording medium includes a plurality of superhigh resolution layers (13, 15) for causing nonlinear changes in a refractive index and an attenuation coefficient at predetermined temperatures individually corresponding thereto. Individually on at least two of the superhigh resolution layers (13, 15), the irradiation quantities of laser beams for causing the recording medium to reach the individual predetermined temperatures are different. The recorded information of the optical information recording medium is reproduced by opening the areas, in which at least one of the superhigh resolution layers has caused a nonlinear optical change whereas at least one of the remaining layers has not caused the nonlinear optical change.</p> |
