VALUABLE DOCUMENT Russian patent published in 2009 - IPC G07D7/12 

FIELD: physics, alarm.

SUBSTANCE: invention is related to facilities of counterfeit protection of valuable securities. Stated valuable document, uppermost banknote, is provided with at least one pair of interconnected first and second phosphors, wave lengths of luminescent radiation of which lie in the common range outside visible spectrum. According to invention, spectra of luminescent radiation of the first and second phosphors are mutually overlapped in at least one subrange of this common range of wave lengths of their luminescent radiation so that spectrum of luminescent radiation of the second phosphor supplements spectrum of the first phosphor luminescent radiation.

EFFECT: higher extent of counterfeit protection due to additional possibility of characteristic variation of phosphor radiation.

31 cl, 3 dwg