Optical Device having a Hidden Depiction

Optical Device having a Hidden Depiction

An optical device, preferably a security device for a security document, including: a transparent or translucent substrate having a first side and a second side; a first depiction layer located on the first side of the substrate defining a first depiction; and a first masking layer, comprising a fir...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: TIERNEY, CHRIS
Format: Patent
Sprache:eng
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
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Beschreibung
Zusammenfassung:An optical device, preferably a security device for a security document, including: a transparent or translucent substrate having a first side and a second side; a first depiction layer located on the first side of the substrate defining a first depiction; and a first masking layer, comprising a first optically variable ink, located at least partially overlapping the first depiction layer, wherein the first depiction is at least substantially opaque and has a low contrast with respect to the appearance of the first masking layer when viewed in reflection, such that the first depiction is identifiable and substantially more visible when viewed in transmission than when viewed in reflection, and method for the manufacture thereof. Key 4 Fl7a E5 7b Figure la Key ] 7a 4 EU7b Figure lb