| 摘要 |
PURPOSE:To provide an optical recording method enabling optical writing by small- sized light wt. semiconductive layer, by irradiating an optical recording medium with infrared rays with a wavelength of 800-900nm corresponding to recording information and discoloring the irradiated part of a recording layer. CONSTITUTION:An optical recording medium having a recording layer containing a polydiacetylene derivative compound and at least one or more of a dye selected from a pyrylium dye, a thiopyrylium dye and a selenapyrylium dye is irradiated with infrared rays with a wavelength of 800-900nm corresponding to recording information and the irradiated part of a recording layer is discolored. For example, 1pts.wt. of a crystalline fine powder of the diacetylene derivative compound represented by general formula C12H25-CidenticalCidenticalC-C8H16-COOH and 1pts.wt. of the pyrylium dye are added to 4pts.wt. of methylene chloride and the resulting mixture is sufficiently stirred and applied to a substrate to form the optical recording medium 1. This optical recording medium 1 is uniformly and sufficiently irradiated with ultraviolet rays with a wavelength of 254nm to polymerize the DA compound in the recording layer to convert the recording layer to a blue film and, thereafter, when the surface of the blue optical recording medium is irradiated with laser beam of 830nm, the irradiated part is discolored to red to perform a desired recording. |
