| 摘要 |
PROBLEM TO BE SOLVED: To provide a discrimination method for simultaneously discriminating printed matters to which a fluorescent substance and/or a phosphorescent substance causing emission and/or after glow by different spectra by irradiation with exciting light having a predetermined wavelength, is imparted, and also to provide a discrimination device. SOLUTION: The printed matters are irradiated with exciting light from a light source to acquire at least an emission characteristic and/or afterglow characteristic spectra emitted from the fluorescent substance and/or the phosphorescent substance imparted to the printed matters by irradiation with exciting light, and the acquired spectra are spectrally measured to detect the specific and imparted patterns of the fluorescent substance and/or the phosphorescent substance from the spectrally measured emission characteristic and/or afterglow characteristic spectra. By this method, the printed matters are discriminated. The discrimination device is also provided. COPYRIGHT: (C)2007,JPO&INPIT
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