VALUE DOCUMENTS AND OTHER ARTICLES HAVING TAGGANTS THAT EXHIBIT DELAYED MAXIMUM INTENSITY EMISSIONS, AND METHODS AND APPARATUS FOR THEIR AUTHENTICATION

VALUE DOCUMENTS AND OTHER ARTICLES HAVING TAGGANTS THAT EXHIBIT DELAYED MAXIMUM INTENSITY EMISSIONS, AND METHODS AND APPARATUS FOR THEIR AUTHENTICATION

Value documents or other articles having authentication features, authentication apparatuses, and methods of authentication are provided that relate to the use of taggants that absorb radiation from an illumination source and emit radiation in a manner that has a maximum intensity occurring a durati...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: LAU, Carsten, KANE, James, RAPOPORT, William Ross
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CALCULATING
CHECKING-DEVICES
COMPUTING
COUNTING
HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Value documents or other articles having authentication features, authentication apparatuses, and methods of authentication are provided that relate to the use of taggants that absorb radiation from an illumination source and emit radiation in a manner that has a maximum intensity occurring a duration of time after the illumination source has been switched off. The taggants include a crystalline composition comprising a host crystal lattice doped with a first rare earth active ion, and in some examples a second rare earth active ion.