Security Device and Authentication Device
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United States of America Patent
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Aug 10, 2017
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Aug 17, 2016
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Abstract
A security device including a pair of transparent substrates having waveguides, wherein, in a waveguide of at least one of the pair of substrates there is disposed a luminescent material that emits light by simultaneously irradiating a first type light and a second type light having different wavelengths, and the first type light and the second type light are made incident on the respective waveguides in a state where the pair of substrates are overlapped with each other and the waveguides are in contact with each other, and thereby the contact part between the waveguides emits light.
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