FIELD: product authentication.
SUBSTANCE: system has at least one material, providing transformation with frequency increase, as protective marking and one authenticating apparatus, which has one source of electromagnetic radiation with one previously selected wave length and one second electromagnetic radiation source with one second previously selected wave length, which are different from each other and are selected in such a way, that they cause emission by material, providing for transformation with frequency increase, of electromagnetic radiation after combined irradiation by emission with first and second wave lengths, and emitted electromagnetic radiation has radiation with one additional third wave length, specific for return of one electron from activation ion energy level to level, at which electron is excited by combined emission with first and second wave lengths.
EFFECT: higher efficiency.
6 cl, 2 dwg
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