Machine-readable optical security device

An IR and/or UV machine-readable optical security device (e.g., micro-optic security thread) that is made up of at least one IR-absorbing component with a characteristic IR signature detectable at two or more IR-wavelengths, at least one UV-absorbing component with a characteristic UV signature dete...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: ZIEGLER, Eric M, GETTENS, Nancy J, PEARSON, Nicholas G
Format: Patent
Sprache:eng
Schlagworte:
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