| 摘要 |
PURPOSE:To reduce optical degradation and to improve durability even in the case of irradiation of daily light by forming a recording medium including selective prescribed wavelength absorbent, transmitting only recording light and reproducing light selectively, thereby absorbing other lights. CONSTITUTION:A base plate 11 is made of polycarbonate mainly by mixing and kneading a selective optical absorbent. A recording film 12 includes cyanine dyestuff, phthaocyanine dyestuff, quinone and quencher to prevent the optical degradation of the dyestuff. The recording film is coated by spincoating method using diacetonealcohol, etc., as a solvent for coating. An optical reflecting film 13 is provided on the recording film 12. The vacuum depositing method, sputtering method and ion-plating method, etc., of precious metals, aluminum, etc., are used. Also a protective layer 14 are layered on this surface. This layer is formed by spincoating of ultraviolet curing resin. Light fastness of a sample formed in such a manner is improved. |
