Michael Rahm
Giesecke & Devrient
93 Papers
834 Citations
Michael Rahm is an academic researcher from Giesecke & Devrient. The author has contributed to research in topics: Layer (electronics) & Substrate (printing). The author has an hindex of 15, co-authored 93 publications.
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Papers
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
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.
101
Patent
Visually Variable Security Element and Method for Production Thereof
Michael Rahm,Marius Dr. Dichtl,Manfred Heim +2 more
- 07 Dec 2006
TL;DR: In this paper, the authors proposed a visually variable security element for protecting articles of value with an achromatically reflective microstructure in the form of a mosaic, comprising of a large number of a chromatically reflectively mosaic elements (26-1, 26-2).
81
Patent
See-through security element with microstructures
Manfred Heim,Marius Dichtl,Michael Rahm +2 more
- 16 Oct 2007
TL;DR: In this article, a see-through security element was proposed for security papers, valuable documents or the like with at least one microstructure having a visual appearance that is dependent on the viewing angle upon inspection.
55
Patent
Method for producing a microstructure
Winfried Hoffmüller,Theodor Burchard,Marius Dr. Dichtl,Patrick Renner,Michael Rahm,Manfred Heim,Lars Hoffmann,Manfred Dotzler,Ralf Liebler,Mario Keller +9 more
- 17 Dec 2008
TL;DR: In this paper, a method for producing a microstructure on a carrier is described, in which a carrier (22) is provided with a relief structure (26, 28) having elevations (26) and depressions (28), and in which the elevations and/or depressions are arranged in the form of the desired micro-structure, and an imprint substance (30, 34) is transferred onto the relief structure by means of a printing tool, wherein the viscosity of the imprint substance is chosen in such a way that the imprint material is transferred selectively
41
Patent
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
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