| 摘要 |
PROBLEM TO BE SOLVED: To reproduce a medium as a dual layer type optical information medium in a sticking type writable optical information medium. SOLUTION: An optical information medium is provided with a first information recording layer 12 capable of optically recording information by irradiating it with a recording laser beam and being made of an organic pigment, a second information recording layer 12' capable of optically recording information by irradiating it with a recording laser beam and being made of the organic pigment, a clearance layer 11 for focusing provided between the first and second information recording layers 12, 12' and having translucency to the recording laser beam and a reproducing laser beam and a first and second translucent substrates 5, 5' provided outside the first and second information recording layers 12, 12'. At least the first substrate 5 and the first information recording layer 12 have translucency to the recording and reproducing laser beams, a signal is recorded by converging the recording laser beam made incident through the first translucent information recording layer 12 on the second information recording layer 12' and the signal is reproduced by converging the reproducing laser beam made incident through the first translucent information recording layer 12. |
