| 摘要 |
PROBLEM TO BE SOLVED: To provide a write-once optical recording medium having extremely high resolving and recording ability which can form a recording mark being smaller than the optical spot size stipulated by the wavelength of a light source and the NA of a focal length lens, and reproduce the row of the recording mark with its high resolving ability. SOLUTION: This optical recording medium has a write-once recording layer (2) which irreversibly changes when it receives once the radiation of a light of recording-level strength. In addition, the optical recording medium has an extremely high resolving-and-recording film (3) which irreversibly changes, when it receives once the radiation of the light of recording-level strength, and forms at the center of the optical spot an optical aperture being smaller than the spot size. |
