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COUNTERFEIT DETECTION METHOD, IDENTIFICATION TAG USED FOR COUNTERFEIT DETECTION, COUNTERFEIT DETECTING DEVICE, INK CARTRIDGE HAVING IDENTIFICATION TAG, AND PRINTER USING COUNTERFEIT DETECTING DEVICE
COUNTERFEIT DETECTION METHOD, IDENTIFICATION TAG USED FOR COUNTERFEIT DETECTION, COUNTERFEIT DETECTING DEVICE, INK CARTRIDGE HAVING IDENTIFICATION TAG, AND PRINTER USING COUNTERFEIT DETECTING DEVICE
PROBLEM TO BE SOLVED: To provide a counterfeit detecting method that is performed at low cost and that makes forgery of identification tag difficult, and to provide the identification tag used for counterfeit detection, and a counterfeit detecting device used for counterfeit detection.;SOLUTION: When a light emitting means 110 of the counterfeit detecting device 100 irradiates an exciting light L, a liquid crystalline compound 202 of the identification tag 200 irradiates polarized fluorescence P. The polarized fluorescence P has only a polarization component of the major axis direction of a molecule of the liquid crystalline compound 202. The polarized fluorescence P is incident on a plurality of polarizing plate 121 and 122, where the directions of transmission axes are mutually different. A transmitted light T1, having transmitted through the polarizing plates 121, is a relatively strong light, but a transmitted light T2, having transmitted through the polarizing plate 122, is a relatively weak light. A plurality of light-detecting means detect these, and a controlling means 140 determines the veracity/falsehood of the identification tag 200, according to the intensity of each light.;COPYRIGHT: (C)2010,JPO&INPIT
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