Optical recording medium having a relationship between groove width and track pitch

摘要

An optical recording/reproducing medium having grooves formed along recording tracks and used for recording/reproducing when irradiated with light L with a specified wavelength lambda, wherein the track pitch p of a groove is at least 200 nm and up to 350 nm, and a ratio wg'/p between the width wg of a groove and a track pitch p is at least 0.24 and up to 0.67.