GENUINE/COUNTERFEIT DISTINGUISHING UNIT, GENUINE/COUNTERFEIT DISTINGUISHING METHOD, AND FLUORESCENT SENSOR

Title:

GENUINE/COUNTERFEIT DISTINGUISHING UNIT, GENUINE/COUNTERFEIT DISTINGUISHING METHOD, AND FLUORESCENT SENSOR

Document Type and Number:

WIPO Patent Application WO/2011/114455

Kind Code:

A1

Abstract:

Fluorescent substances having similar peak wavelengths for fluorescence excited by irradiation of excitation light are to be detected in distinction. In order to solve this issue, a UV_LED irradiates excitation light to a leaf of paper, a first light-reception unit receives light having a first wavelength range that includes the peak wavelength of fluorescence excited by a fluorescent substance due to irradiation of excitation light, and a second light-reception unit receives light emitted from the same area as the area on the leaf of paper that emitted light to be received by the first light-reception unit, said light having a second wavelength range that is positioned near the first wavelength range. Then, a fluorescent substance specifying unit specifies the type of fluorescent substance added to the leaf of paper on the basis of outputs from the first light-reception unit and the second light-reception unit, and an evaluation unit evaluates whether the leaf of paper is genuine or counterfeit on the basis of the result evaluated by the fluorescent substance specifying unit.

Inventors:

KONISHI TAKAAKI (JP)

Application Number:

PCT/JP2010/054537

Publication Date:

September 22, 2011

Filing Date:

March 17, 2010

Export Citation:

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Assignee:

GLORY KOGYO KK (JP)
KONISHI TAKAAKI (JP)

International Classes:

G07D7/12

Foreign References:

JP2001052232A	2001-02-23
JPH10143705A	1998-05-29
JP2002109598A	2002-04-12
JP2007136838A	2007-06-07

Other References: