IDENTITY FEATURE IN FORM OF LUMINOPHORE Russian patent published in 2012 - IPC G07D7/12 

FIELD: physics.

SUBSTANCE: invention describes a printed valuable document with at least one identity feature in form of a luminophore based on crystal lattices which are doped with ions of one or more elements. With appropriate doping of crystal lattices with different ions, exchange interactions occur between exchange-coupled clusters of ions, which results in combined effects which are meant to define the identity feature.

EFFECT: wider field of use of luminophores with different luminescence spectra.

30 cl, 5 dwg