Optical recording information medium

摘要

An optical recording medium comprising a recording and a metal reflective layers on a transparent substrate having a groove, wherein the recording layer comprises an azaporphyrin metal complex dye with 1 to 4 meso-nitrogen atoms as a main component; recording and/or reproduction can be conducted using laser beams with wavelengths of lambda 1 and lambda 2 which is shorter than lambda 1; a refractive index n of the recording layer is 2.0 or more at lambda 1 and 1.8 or more at lambda 2 as well as an attenuation coefficient k of the layer is 0.04 to 0.20 at lambda 1 and 0.30 or less at lambda 2; and the groove has a pitch of 0.70 to 0.85 mu m, a half-value width of 0.20 to 0.35 mu m and an inclination angle of 45 to 65 DEG :