| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical recording medium forming an excellent short bit, excellent even in high linear speed recording and suitable for recording with a short wavelength at 600 nm-700 nm. SOLUTION: This medium is constituted by laminating a recording layer consisting essentially of an organic dyestuff that at least the tilt of mass reduction in a main mass reduction process is 2%/ deg.C or above and the total mass reduction in its process is 30% or above and a metallic reflection layer in this order on a transparent substrate where a recording/reproducing light guiding groove having a groove depth 100 nm-180 nm, a track pitch 0.7 μm-1.0 μm and a groove width 0.2-0.4 μm is formed beforehand. The medium satisfies the condition that a distortion angle θ of a waveform in a long mark of 10T or above is 15 deg. or below, records/reproduces at the wavelength 600-700 nm and records/reproduces at a high speed of linear velocity 4.9 m/s or above. |
