Transmission security element

The security element (40) has a thin film element (42) i.e. two-layered thin film element, with color shift effect and comprising a metallic layer (44) and a dielectric layer (46), where the metallic layer is semitransparent and the security element exhibits a color in transmitted light at an angle...

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Bibliographic Details
Main Authors LOCHBIHLER, HANS, BÄHR, ANNETT
Format Patent
LanguageEnglish
French
German
Published 23.09.2015
Subjects
ADVERTISING
BOOK COVERS
BOOKBINDING
CRYPTOGRAPHY
DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR
DISPLAY
DISPLAYING
EDUCATION
FILES
LABELS OR NAME-PLATES
LOOSE LEAVES
MOVABLE-STRIP WRITING OR READING APPARATUS
PERFORMING OPERATIONS
PHYSICS
PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES
PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR
SEALS
SIGNS
SPECIAL PRINTED MATTER
TRANSPORTING
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Summary:The security element (40) has a thin film element (42) i.e. two-layered thin film element, with color shift effect and comprising a metallic layer (44) and a dielectric layer (46), where the metallic layer is semitransparent and the security element exhibits a color in transmitted light at an angle between 0 and 40 degrees. Thickness of the metallic layer lies between 5 and 70 nm. The metallic layer forms a selective absorbent optical element in a visible spectral range. An independent claim is also included for a method for manufacturing a transmission security element.
Bibliography:Application Number: EP20100000465