Method for recording information on optical recording medium, information recorder, and optical recording medium

An information recording method for recording information in a data rewritable type optical recording medium having at least stacked first and second information recording layers by projecting a laser beam thereonto whose power is modulated between a plurality of powers including at least a recording power (Pw) and an erasing power (Pe) via a light incidence plane, the information recording method comprising a step of, when recording information in the optical recording medium, setting a ratio (Pe/Pw) of the recording power and the erasing power when information is to be recorded in the first information recording layer to be 0.38 to 0.66 times that when information is to be recorded in the second information recording layer.

An information recording apparatus for recording information in a data rewritable type optical recording medium having at least stacked first and second information recording layers by projecting a laser beam thereonto whose power is modulated between a plurality of powers including at least a recording power (Pw) and an erasing power (Pe) via a light incidence plane, the information recording apparatus being constituted so as to set λ/NA to be equal to or shorter than 700 nm where λ is a wavelength of the laser beam and NA is a numerical aperture (NA) of an objective lens, and, when recording information in the optical recording medium, set a ratio (Pe/Pw) of the recording power and the erasing power when information is to be recorded in the first information recording layer to be smaller than that when information is to be recorded in the second information recording layer.

An optical recording medium which has at least stacked first and second information recording layers and in which information can be recorded by projecting a laser beam thereonto whose power is modulated between a plurality of powers including at least a recording power (Pw) and an erasing power (Pe) via a light incidence plane, the optical recording medium comprising setting information required for setting λ/NA to be equal to or shorter than 700 nm where λ is a wavelength of the laser beam and NA is a numerical aperture (NA) of an objective lens, and, when recording information therein, setting a ratio (Pe/Pw) of the recording power and the erasing power when information is to be recorded in the first information recording layer to be smaller than that when information is to be recorded in the second information recording layer.