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
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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
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Abstract: The invention relates to a method for producing a microstructure on a carrier (22), in which a carrier (22) is provided with a relief structure (26, 28) having elevations (26) and depressions (28), and in which the elevations (26) and/or depressions (28) are arranged in the form of the desired microstructure, and an imprint substance (30; 34) is transferred onto the relief structure (26, 28) by means of a printing tool, wherein the viscosity of the imprint substance (30; 34) is chosen in such a way that the imprint substance (30; 34) is transferred selectively either substantially only onto the elevations (26) or substantially only into the depressions (28) of the relief structure.
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Citations
Patent
Multi-layer body
Andreas Schilling,Wayne Robert Tompkin,Achim Hansen +2 more
- 05 Jul 2010
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.
35
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
30
Patent
Thin-layer element having an interference layer structure
Christian Fuhse,Michael Rahm,Manfred Heim,Ralf Liebler +3 more
- 10 Sep 2010
TL;DR: In this paper, a thin-layer element having an interference layer structure for security papers, valuable documents, and the like, comprising at least two semi-transparent absorber layers (34, 38) and at least one dielectric spacer layer (36) arranged between them, was proposed.
30
Patent
Security element and method for manufacturing the same
Winfried Hoffmüller,Marius Dichtl,Stefan Bichlmeier,Lars Hoffmann,Manfred Heim +4 more
- 02 Jul 2009
TL;DR: In this paper, a security element for securing valuables was proposed, which consisted of at least one at least partial first layer (13) from a cholesteric liquid-crystalline material, an additional layer (22) having a machine-readable feature that is at least partially covered by the first and second layers from the liquidcrystal material.
29
Patent
Method for producing a micro-optical display arrangement
Lars Hoffmann,Manfred Dotzler,Manfred Heim,Marius Dr. Dichtl,Michael Rahm,Ralf Liebler +5 more
- 01 Apr 2009
TL;DR: In this paper, a method for producing a micro-optical display arrangement for the display of a predetermined motif having a colored motif grid from a plurality of micro-motif elements (50, 52), and a focusing element grid from the micro-focusing elements (40), was proposed.
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References
Patent
Micro-optic security and image presentation system
Richard A. Steenblik,Mark J. Hurt,Gregory R. Jordan +2 more
- 22 Nov 2004
TL;DR: In this paper, an in-plane image consisting of an array or pattern of image icons and an array of focusing elements is presented, where the interaction of the focusing elements with the image icons forms a separate synthetically magnified image that serves to control the field of view of the inplane image and, thus, serves to modulate or control the extent of appearance of the image.
294
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
Sheeting with composite image that floats
Douglas S. Dunn,Robert L. W. Smithson,Robert T. Krasa,Michael W. Dolezal +3 more
- 02 Apr 2007
TL;DR: Translucent, transparent, or semi-translucent microlens sheetings with composite images are disclosed, in which a composite image floats above or below the sheeting, or both as discussed by the authors.
223
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
Security device for security documents such as bank notes and credit cards
Kenneth John Drinkwater,Philip Mark Gurney Hudson +1 more
- 10 May 1994
TL;DR: In this article, a security device includes an array of microimages which, when viewed through a corresponding array of substantially spherical microlenses, generates a magnified image, and in some cases, the array of macro-lenses is bonded to the arrays of micro-images.
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