| 摘要 |
PURPOSE: To prevent the thermal deformation of a layer contg. a saturable absorbing dyestuff and a substrate by irradiation with laser beam and to obtain a satisfactory reproduced signal from a fine pit pattern with pits formed with a period almost equal to or shorter than the cutoff period (λ/2NA) of a reproducing optical system. CONSTITUTION: At least a layer 3 contg. a saturable absorbing dye-stuff is formed on a transparent substrate 1 with a pit pattern corresponding to an information signal formed in a rugged shape to obtain the objective optical recording medium for super-resolving reproduction. The thickness (d) of the layer 3, the numerical aperture(NA) of the object lens of a reproducing optical system and the wavelength (λ) of reproducing light are set so as to satisfy the condition or 0.5.λ/NA<2> <d<λ/NA<2> . |
