| 摘要 |
PROBLEM TO BE SOLVED: To provide a recordable, practically easy-to-use, and decoratively superior optical recording medium with a large information capacity >=15 giga bytes, its recording/reproducing method, and its recording/reproducing device. SOLUTION: In this optical recording medium, at least a reflective layer 11, a recording layer 12, and a cover layer 13 with a thickness <=0.32 mm and >=0.2 mm are laminated in this order on a substrate 10 provided with a track guide and a label 14 is formed in a side opposite to the reflective layer 11 in regard to the substrate 10 with the track guide. Recording and reproducing are carried out by narrowing down and irradiating a light beam on the recording layer 11 through the cover layer 14 by using an optical system with a wavelength <=450 nm and >=400 nm and an objective lens with an NA >=0.66. |
