Optical information recording medium

摘要

The optical information recording medium of the present invention includes an information layer provided on a substrate. The information layer includes: a recording layer with respect to which information can be recorded and reproduced through irradiation with a laser beam having a predetermined wavelength; a first protective layer that is located, with respect to the recording layer, on the side to which the laser beam is incident; and a second protective layer that is located, with respect to the recording layer, on the opposite side to the side to which the laser beam is incident. The refractive index n 1 of the first protective layer and the refractive index n 2 of the second protective layer at the predetermined wavelength of the laser beam that is used for recording and reproduction satisfy a relationship of n 2