JP2008257861A5 - - Google Patents

Claims (11)

In an optical information recording medium capable of recording information by recording information by irradiation with a light beam having a wavelength of 408 nm, or reproducing recorded information,
The light beam irradiation side of the base plate, and has a reproducing layer for reproducing a short mark length of the signal from the optical system resolution limit with the reproducing device corresponding to the optical information recording medium, an optical system having a reproducing apparatus An optical information recording medium, wherein a recording mark having a mark length shorter than a resolution limit is recorded , and a groove for recording an address indicating a recording position is provided . A function layer that is laminated on the light beam irradiation surface side of the substrate and assists in recording and reproducing information, and the reproduction layer that is laminated on the surface of the function layer and whose transmittance varies based on the light intensity distribution of the light beam. The optical information recording medium according to claim 1, further comprising: a layer.   3. The optical information recording medium according to claim 1, wherein the reproducing layer is made of a material whose transmittance changes with temperature.   4. The optical information recording medium according to claim 1, wherein at least a part of the reproducing layer on the light incident surface side is in contact with air.   5. The optical information according to claim 1, wherein an endothermic layer that converts light of the light beam into heat is provided as the functional layer adjacent to the reproduction layer. 6. recoding media.   6. The optical information recording according to claim 1, wherein a reflection layer that reflects the light beam is provided between the substrate and the reproduction layer as the functional layer. Medium.   7. The optical information recording medium according to claim 1, wherein the reproducing layer is made of a metal oxide.   The optical information recording medium according to claim 7, wherein the reproduction layer is made of zinc oxide. 6. The optical information recording medium according to claim 5, wherein the endothermic layer is made of silicon or germanium alone or an alloy of silicon and germanium.   10. The method for reproducing an optical information recording medium according to claim 1, wherein the optical system has a reproducing apparatus by irradiating a light beam from the side of the substrate where the reproducing layer is formed. A method for reproducing an optical information recording medium, wherein a signal having a mark length shorter than the limit is reproduced. 10. A recording method for recording on an optical information recording medium according to any one of claims 1 to 9, wherein the address is recorded in a groove for recording an address for providing information on a reproduction position. Recording method of information recording medium.