| 摘要 |
PURPOSE:To provide a high sensitivity and high contrast by forming a 1st recording layer which has the peak of a spectral reflectivity near recording and reproducing light wavelengths, an intermediate layer which is transparent to recording and reproducing light and has the smaller refractive index than the refractive index of a 2nd recording layer and the 2nd layer which has the peak of a spectral reflectivity near the recording and reproducing light wavelengths. CONSTITUTION:The recording layer consisting of the laminate of the 1st recording layer 2, the intermediate layer 3 and the 2nd recording layer 4 is provided on a substrate 1 and further, a protective layer 5 is provided thereto to constitute this recording medium. The 1st recording layer 2 is formed of a film essentially consisting of an org. dye which exhibits the reflection max. near the recording and reproducing light wavelengths. The intermediate layer 3 consists of a thermally softenable high-polymer material which allows the transmission of the recording and reproducing light and has the refractive index smaller than the refractive index of the 2nd recording layer 4. The 2nd recording layer 4 is formed of the film essentially consisting of the org. dye which exhibits the absorption max. near the recording and reproducing light wavelengths. The recording with the high sensitivity and high contrast is possible in this way even if there is the protective layer 5. |
