Optical recording medium

摘要

The present technology relates to an optical recording medium for realizing an optical recording medium capable of high-capacity recording. A groove and a land are formed, the groove being concave and the land being convex when seen from a side of a laser light incident surface, both of the groove and the land being recording tracks where recording or reproduction of information is performed. According to this recording layer, a pitch between the groove and the land that are adjacent recording tracks is within a range of 250 nm to 200 nm. Moreover, recording or reproduction of information is performed with respect to the recording tracks by irradiation of laser light whose wavelength is 400 nm to 415 nm by an optical system whose NA is 0.85±0.1.

主权项

1. An optical recording medium comprising:
a recording layer on which a groove and a land are formed, wherein the groove is concave and the land is convex when seen from a side of a laser light incident surface, wherein both the groove and the land are recording tracks where recording or reproduction of information is performed by irradiation of laser light whose wavelength is 400 nm to 415 nm by an optical system whose numerical aperture (NA) is 0.85±0.1, wherein a pitch between the groove and the land that are adjacent recording tracks is within a range of 250 nm to 200 nm, such that a symbol error rate of the recording layer does not exceed 4.3×10−3 during the reproduction.