Patent
Security element, value document comprising such a security element, and method for producing such a security element
Christian Fuhse,Manfred Heim,Michael Rahm,Andreas Rauch,Stefan Bichlmeier +4 more
- 03 Dec 2010
101
TL;DR: In this article, a carrier has a reflective areal region which is divided into a multiplicity of reflective pixels, each pixel has at least one reflective facet which is formed in a surface of the carrier, and the at least 1 reflective facet reflects light incident along a predetermined direction on the areal regions directionally in a reflection direction predefined by the orientation of the facet.
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Abstract: A security element for a security paper, value document or the like, having a carrier which has a reflective areal region which is divided into a multiplicity of reflective pixels. The area of each pixel is smaller than the area of the reflective areal region by at least one order of magnitude. Each pixel has at least one reflective facet which is formed in a surface of the carrier, and the at least one reflective facet reflects light incident along a predetermined direction on the areal region directionally in a reflection direction predefined by the orientation of the facet. The orientations of the facets of different pixels have a substantially random variation over the reflective areal region.
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Citations
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TL;DR: In this paper, an optically variable surface pattern is divided into at least three sub-areas (8-11) having respectively several pixel sections (4-7), where a first and a second sub-area reproduce two different perspectives of a first pattern when pivoting about a first axis and dependent on the viewing angle.
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Multi-layer body
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TL;DR: In this article, a multi-layer body consisting of a first layer (13) having a plurality of first zones (21), which are separated from each other by one or more transparent second zones (22) is described.
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Optically variable security element
André Gregarek,Michael Rahm,Josef Schinabeck,Winfried Hoffmüller +3 more
- 28 Apr 2014
TL;DR: In this article, an optically variable security element for security papers, value documents and other data storage media, comprising a single or multi-layered central body (20) having opposing first and second main surfaces (22, 24), an arrangement of similar micro-lenses (26) on the first main surface (22) of the central body, the refracting effect of the microlenses defining a focal plane (28), a laser-sensitive recording layer (40) disposed on the second main surface(24), a mask layer (30) which is disposed between the
30
Patent
Security element, and value document comprising such a security element
Christian Fuhse,Michael Rahm,Andreas Rauch +2 more
- 29 Jun 2011
TL;DR: In this paper, a security element for a security paper, value document or the like, comprising a support having a motif region (3), which provides a visually perceptible motif having a first and a second motif part (4, 5), wherein the motif region comprises a first micro-optical representation arrangement (11), (e.g. microlenses (10) and microstructures (9), forming a moire magnification arrangement; a partially demetallized perforated screen (31); or a diffractive structure), which presents at least two different images as
29
References
•Book
Optical document security
Van Renesse,L Rudolf +1 more
- 01 Jan 1994
TL;DR: This book discusses forensic Aspects of Document Counterfeit, security design of Valuable Documents and Products, and an Introduction to Biometrics.
233
Patent
Security element and method for the production thereof
Manfred Heim
- 10 Feb 2006
TL;DR: In this paper, a security element for protecting valuable objects having first and second authentication features is proposed, where the first authentication feature consists of a plurality of focussing components arranged in a first raster and a second arrangement consisting of plurality of microscopic structures arranged in the second raster.
233
Patent
Thin film structure having magnetic and colour shifting properties
Roger W. Phillips,Paul G. Coombs +1 more
- 28 Apr 1989
TL;DR: In this article, a thin film structure having magnetic and optical variable properties comprising a substrate (12) and a multilayer interference coating (16) carried by the substrate producing an inherent colour shift with angle.
199
Patent
Security Element and Method for Producing the Same
Winfried Hoffmüller,Marius Dr. Dichtl,André Gregarek +2 more
- 08 Aug 2005
TL;DR: A security element for security papers, bank notes, ID cards or the like, having at least one plastic layer on which at least two metal layers of different color are so disposed side by side and on the same side of the plastic layer that the different colors are visually checkable as discussed by the authors.
193
Patent
Documents embossed with optical markings representing genuineness information
David L. Greenaway
- 01 Sep 1978
TL;DR: In this paper, a document comprising a flat support member of non-thermoplastic material at least partly coated with a thermoplastic coating, in which coating are embossed optical markings having a light-modifying relief structure, representing information indicating the genuineness or identity of the document.
190
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