Judgment device

摘要

Problem to be solved: to provide a technology capable of achieving high security using phosphors.The decision unit 1 comprisesAn irradiation unit 11 for irradiating first and second excitation light having wavelengths different from each other to the object 2Is it possible to change at least one intensity of the first and second excitation lightOrAn irradiation unit 11 capable of switching the irradiation mode between a first mode of irradiating the first and second excitation light simultaneously with respect to the object 2 and a second mode in which only one of the first and second excitation light is irradiated to the object 2 is determined;The light from the object 2 is receivedThe light receiving unit 12 outputs a signal corresponding to the intensity of the first and second light emitting wavelengths different from each otherIf the behavior of the upconversion phosphor, which produces the first and second light emission by irradiating the first and second excitation light, is not confirmed by the signal, thenThe judgment object 2 is provided with a judgment part 13 for judging that it is an illegal product.Diagram