Optical information recording medium

Claim 1

An optical information recording medium comprising a substrate, a first recording layer, a second recording layer and a third recording layer, superposed in this order, wherein: said first recording layer is a coated layer made of an organic material and satisfies the following conditions (1) and (2): n.sub.1r ≧1.8 (1) k.sub.1r ≦0.5 (2) said second recording layer is a coated layer made of an organic material and satisfies the following conditions (3) and (4): n.sub.2r <1.8 (3) k.sub.2r ≦0.5 (4) and said third recording layer is a coated layer made of an organic material and satisfies the following conditions (5) and (6): n.sub.3r ≧1.8 (5) k.sub.3r ≦0.5 (6) wherein n 1r , n 2r and n 3r represent a real part of a complex refractive index of the first recording layer, that of the second recording layer and that of the third recording layer, respectively, at the wavelength of a reproducing laser beam; and k 1r , k 2r and k 3r represent an imaginary part of a complex refractive index of the first recording layer, that of the second recording layer and that of the third recording layer, respectively, at the wavelength of a reproducing laser beam.