Patent ID: 7507457

Claim:
An optical recording medium comprising: a support substrate having information recorded thereon; and a light transmission layer that is provided so as to come in contact with the support substrate, wherein an extinction coefficient of the support substrate and an extinction coefficient of the light transmission layer is different, and when a refractive index of the support substrate and a refractive index of the light transmission layer with respect to light having a wavelength of 405 nm are n 11 and n 12 , respectively, and a difference between the extinction coefficient of the support substrate and the extinction coefficient of the light transmission layer with respect to light having a wavelength of 405 nm is k, the following equation is satisfied: 0.03 ≤ ( ( n 11 - n 12 ) 2 + k 2 ) ( ( n 11 + n 12 ) 2 + k 2 ) ) .