Optical recording medium having a specified range of pit widths and pit depths

摘要

An optical recording medium capable of being reproduced by a conventional drive device which meets an optical disk having grooves and no groove in an area in which pits are formed. In the optical recording medium having pits 1 showing information signals in the shape of protruding and recessed parts, it is assumed that the depth t1 of the above mentioned pits t2 of the pits 1 is located within a range of 0.3 to 0.6 mu m. Herein, n designates the refractive index of the base of the optical recording medium and designates the wavelength of the light used for reproduction.