公开(公告)号：US10926574B2

公开(公告)日：2021-02-23

申请号：US16063684

申请日：2016-12-13

申请人： SICPA HOLDING SA

发明人： Jean-Luc Dorier ,  Benito Carnero ,  Mia Milos-Schouwink

IPC分类号： G01N21/64 ,  B42D25/378 ,  B42D25/382 ,  B42D25/387 ,  G07D7/0043 ,  G07D7/1205 ,  C09D11/037 ,  C09D11/50 ,  G07D7/20 ,  G07D7/12 ,  C09D11/101 ,  C09D11/033 ,  C09D11/30 ,  C09D11/106 ,  B42D25/405 ,  B41M3/14 ,  C09D11/54

摘要： Security element including a first and second pattern formed by a first and second material respectively in or on a first and a second region of a substrate respectively, the first pattern partially overlapping with said second pattern, the first material comprising a first luminescent dye, which upon excitation by electromagnetic radiation falling within its excitation wavelength range emits electromagnetic radiation in a first emission wavelength range, the second material comprising a second luminescent dye, which upon excitation by electromagnetic radiation falling within its excitation wavelength range emits electromagnetic radiation in a second emission wavelength range, said first emission wavelength range overlapping with the excitation wavelength range of the second luminescent dye, so that upon irradiation within the excitation wavelength range of the first luminescent dye the second luminescent dye is excited, in the overlapping area of the patterns, to emit electromagnetic radiation in the emission wavelength range.