Visually Variable Security Element and Method for Production Thereof

Patent

Visually Variable Security Element and Method for Production Thereof

- 07 Dec 2006

81

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).

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Citations

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.

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233

Patent

Security Element and Method for Producing the Same

Winfried Hoffmüller, +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.

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193

Patent

Security element, value document comprising such a security element, and method for producing such a security element

Christian Fuhse, +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.

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101

Patent

Layer-type value document comprising an ink mixture in one layer

Georg Depta, +3 more

- 05 Apr 2005

TL;DR: In this paper, a banknote is described as a sequence of layers comprising a marking layer composed of an ink mixture (24, 26) comprising a component absorbing the laser radiation and a component (24) which is transparent to the radiation.

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70

Patent

Safety element provided with an optically-variable layer and method for the production thereof

Manfred Heim, +1 more

- 06 Oct 2005

TL;DR: In this paper, a safety element for protecting valuable objects comprising an optically variable layer (20) producing different color effects when viewed at different angles was proposed, where a semi-transparent colour layer (34) is disposed in a covering area (32) over the Optically Variable Layer (20).

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References

Patent

Transparent reflection-type

Satoshi Takeuchi, +4 more

- 26 Sep 1988

TL;DR: In this article, a transparent-type hologram consisting of a transparent hologram-forming layer and a holographic effect-enhancing layer comprising a thin transparent film was presented, with the effect enhancing layer being laminated on the hologram forming portion of the transparent holograms.

...read moreread less

332

Patent

Cube-corner retroreflective articles having wide angularity in multiple viewing planes

Timothy L. Hoopman

- 30 Jul 1984

TL;DR: In this article, a set of cube-corner retroreflective articles having improved angularity along multiple viewing planes are provided. The articles are rotated 180° with respect to one another, the three lateral mutually perpendicular faces of the elements being defined at their bases by linear edges that lie in a common plane, and the optical axes being tilted toward one another.

...read moreread less

298

Patent

Micro-optic security and image presentation system

Richard A. Steenblik, +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.

...read moreread less

294

Patent

Apparatus and methods for fluorescent imaging and optical character reading

Louis H. Liang

- 27 May 1997

TL;DR: An authentication system combines a source of ultraviolet light (and optionally a scanning mechanism) with apparatus for capturing and recognizing either graphic images or characters or both, where the graphic images and characters have been previously made with fluorescent substances that may be invisible under ordinary visible light, but are rendered detectable by the ultraviolet light.

...read moreread less

236

•Book

Optical document security

Van Renesse, +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.

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