| 摘要 |
An information code is provided as a light transmissive object in which an information code is formed. When visible light is radiated to the object, the object maintains its light transmissive state, with no presentation from an information code in the object. Light of a first wavelength band, which differs from the visible light, is radiated to the object, the information code produces an image on light of a second wavelength band which differs from the first wavelength band. From an information code reader, the light of the first wavelength band is radiated to the information code medium, during which the light of the second wavelength band from the code is received by the reader. Based on reception results of the light of the second wavelength band, the information code is decoded. By way of example, decoded results are used to determine if the information code is authentic. |
