| 摘要 |
PROBLEM TO BE SOLVED: To allow a blue semiconductor laser having a short oscillation wavelength to be excellently recorded and reproduced by using a dye having suitable optical characteristics and chemical characteristics in a recording layer. SOLUTION: An optical recording medium comprises at least the recording layer capable of recording and reproducing information according to a laser beam on a substrate and containing a compound represented by formula (1), (wherein a ring A is an aromatic hydrocarbon ring or an aromatic heterocycle which may contain a substituent, X is an oxygen atom or a sulfur atom, R1 to R5 are each independently a hydrogen atom or an arbitrary substituent. However, any two or more groups of R1 to R4 are bonded and a ring may be formed). |
