Invention Grant
US07682678B2 Optical information recording medium, recording and readout methods using the same, optical information recording device, and optical information readout device 失效
光信息记录介质,使用其的记录和读出方法,光信息记录装置和光信息读出装置

Optical information recording medium, recording and readout methods using the same, optical information recording device, and optical information readout device
Abstract:
An optical information recording medium includes a substrate formed in a concave-convex state by providing pits or grooves corresponding to recorded information, used for optically reproducing the information by irradiation of a light beam, and may also include a recording layer. The optical information recording medium includes a temperature responsive layer 21 whose reflectance and/or transmittance for the light beam changes with an increase in temperature caused by the irradiation of a light beam and a light absorption layer 22. With such an arrangement, the present invention provides an optical information recording medium enabling secure and highly accurate readout of information recorded with high density, a recording method and a readout method using the same, a readout device, and a recording device.
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