Ovd Kinegram Ag

Leonhard Kurz Stiftung & Co Kg

Landis & Gyr Technology Innovation Ag

Bundesdruckerei Gmbh

Polyic Gmbh & Co Kg

Leonard Kurz Gmbh & Co. Kg

Adorsys Gmbh & Co. Kg

Ovd Kingegram Ag

Electrowatt Technology Innovation Corp.

Kba-notasys Sa

Leonhard Kurz Gmbh & Co., Kg

Wayne Robert Tompkin

Andreas Schilling

Rene Staub

René Staub

Harald Walter

Achim Hansen

Sebastian Mader

Ren&eacute; Staub

John Anthony Peters

Ludwig Brehm

Michael Scharfenberg

Jörg Fischer

Norbert Lutz

Olga Kulikovska

Andre Leopold

Rainer Stahl

Markus Burkhardt

Gernot Schneider

Olaf Krolzig

Jurgen Metzger

Walter Fix

Klaus Ludwig

Manfred Walter

André Leopold

Johannes Schad

Rouven Spiess

Uwe Frieser

Vincent Moreau

Benno Schmitzer

Eser Alper Unal

Stéphane Bolognini

Daniel Holliger

Peter Gehr

Christoph Weiteneder

Andreas Hasler

Jakob Jütz

Martin Müller

Ralf Wondratschek

Alexander Gugel

Klaus Schmidt

Rene Schaedler

Stephane Bolognini

Ralf Wrondratschek

Jürgen Metzger

Eser Alper ÜNal

René Schaedler

Dr Markus Burkhardt

A method for producing security elements, security elements, a security document with at least one security element as well as a transfer film with at least one security element, wherein a three-dimensional object is recorded and a surface profile of the three-dimensional object, described by a function F(x,y), is determined, wherein the function F(x,y) describes the distance between the surface profile and a two-dimensional reference surface spanned by co-ordinate axes x and y at the co-ordinate points x and y. A first microstructure is determined in such a way that the structure height of the first microstructure is limited to a predetermined value smaller than the maximum distance between the surface profile and the two-dimensional reference surface, and the first microstructure provides an observer with a first optical perception which corresponds to the surface profile of the three-dimensional object described by the function F(x,y).

Method for producing security elements, and security elements

A multilayer body includes a transparent first layer. In the transparent first layer, a multiplicity of microlenses arranged in accordance with a microlens grid are impressed in a first region. Furthermore, the multilayer body includes a second layer, which is arranged below the first layer and in a fixed position with respect to the first layer and has a multiplicity of microimages arranged in accordance with a microimage grid and in each case in an at least regional overlap with one of the microlenses of the microlens grid for the purpose of generating a first optically variable information item. The grid pitches of the microimage grid and of the microlens grid in each case in at least one spatial direction are less than 300 &#x3bc;m.

Multilayer body

A multilayer body () and a method for producing a security element are described. The multilayer body has a metal layer (). An optically active surface relief is molded at least in areas in a first surface of the metal layer () facing the upper side of the multilayer body or forming the upper side of the multilayer body and/or in a second surface of the metal layer () facing the underside of the multilayer body or forming the underside of the multilayer body. In at least one first area (to) of the multilayer body the surface relief is formed by a first relief structure (). In at least one direction () determined by an allocated azimuth angle, the first relief structure () has a sequence of elevations () and depressions (), the elevations () of which follow on from each other with a period P which is smaller than a wavelength of visible light, wherein the minima of the depressions () lie on a base surface and the first relief structure () has a relief depth t which is determined by the spacing of the maxima of the elevations () of the first relief structure () from the base surface in a direction perpendicular to the base surface. The profile shape and/or the relief depth t of the first relief structure () is chosen such that the colored appearance of the light () incident on the first area (to) at least at a first angle of incidence and directly reflected by the metal layer () in the first area or directly transmitted through the metal layer is modified, in particular is modified by plasmon resonance of the metal layer with the incident light.

Multilayer body and method for producing a security element

A method for producing a multilayer body, with the steps of:

Multilayer body and method for producing same

The invention relates to a security element (), a security document () with at least one security element (), a transfer foil () with at least one security element () as well as a method for producing a security element (), wherein the security element has at least one layer () that is electrically alterable in its optical effect. It is here provided that the at least one layer () that is electrically alterable in its optical effect has liquid crystals () that can be oriented in an electric field, wherein the at least one layer () that is electrically alterable in its optical effect has rod-shaped dye molecules (), and the orientations of the longitudinal axes () of the rod-shaped dye molecules () are alterable depending on the orientations of the longitudinal axes () of the spatially adjacent liquid crystals () that can be oriented in the electric field, and/or wherein the liquid crystals () that can be oriented in the electric field are formed in such a way that the liquid crystals () that can be oriented in the electric field simultaneously act as dye molecules.

Security element

A method for producing a volume hologram with at least one first area in a first color and at least one second area in a second color includes,

Method and master for producing a volume hologram

A method for producing security elements, security elements, a security document with at least one security element as well as a transfer film with at least one security element wherein a three-dimensional object is recorded and a surface profile of the three-dimensional object, described by a function F(x,y), is determined, wherein the function F(x,y) describes the distance between the surface profile and a two-dimensional reference surface spanned by co-ordinate axes x and y at the co-ordinate points x and y. A first microstructure is determined in such a way that the structure height of the first microstructure is limited to a predetermined value smaller than the maximum distance between the surface profile and the two-dimensional reference surface, and the first microstructure provides an observer with a first optical perception which corresponds to the surface profile of the three-dimensional object described by the function F(x,y).

The invention relates to a multi-layer body () and a process for the production thereof. The multi-layer body has a first layer () with a first surface () and a second surface () opposite the first surface (). The first surface () of the first layer () is defined by a base plane spanned by coordinate axes x and y, wherein a large number of facet faces () are molded into the second surface () of the first layer () in a first area (). Each of the facet faces () is determined by one or more of the parameters F, S, H, P, Ax, Ay and Az, wherein the parameters of the facet faces () arranged in the first area () are varied pseudorandomly in the first area () within a variation range predefined in each case for the first area of surface and wherein a reflective second layer () is applied to each of the facet faces.

Multi-layer body

An optically variable element has first and second diffraction gratings which are high-frequency and therefore act reflectively into the zero diffraction order. Either a first color is generated by the first diffraction grating at a particular angle of rotation and a particular angle of illumination and simultaneously a second color, different from the first color, is generated by the second diffraction grating or a visible color is generated essentially only by the first diffraction grating at a first angle of rotation and a visible color is generated essentially only by the second diffraction grating at a second angle of rotation.

Optically variable element

The invention relates to a security element () with a first area () that is transparent in transmitted light. The security element () has a substrate () which has, in the first area (), one or more transmissive diffraction structures which display one or more optical security features when observed in transmitted light.

Security element and security document

The invention relates to a method for authenticating an optically variable security element (), in particular a diffractive security element, with the steps:

Method for authenticating a security element, and optically variable security element

A decorative element (), in particular in the form of a transfer film, a laminating film or a security thread, as well as a security document with a decorative element and a method for producing same is described. The decorative element () has a microstructure () which generates an optical effect in incident light and/or with light passing through. In a first area (), the microstructure () has a base surface () and several base elements () which have in each case an element surface raised or lowered compared with the base surface () and a flank arranged between the element surface and the base surface (). The base surface () of the microstructure defines a base plane spanned by coordinate axes x and y. The element surfaces of the base elements () in each case run substantially parallel to the base plane. In at least one or more first zones of the first area (), the element surfaces of the base elements () and the base surface () are spaced apart in a direction running perpendicular to the base plane () in the direction of a coordinate axis z by a first distance which is chosen such that a color is generated in the one or more first zones in particular by interference of the light reflected at the base surface and the element surfaces in incident light and/or in particular by interference of the light transmitted through the element surfaces and the base surfaces with light passing through.

Decorative element and security document comprising a decorative element

A multilayer body includes a transparent first layer. In the transparent first layer, a multiplicity microlenses arranged in accordance with a microlens grid are impressed in a first region. Furthermore, the multilayer body includes a second layer, which is arranged below the first layer and in a fixed position with respect to the first layer and has a multiplicity of microimages arranged in accordance with a microimage grid and in each case in an at least regional overlap with one of the microlenses of the microlens grid for the purpose of generating a first optically variable information item. The grid pitches of the microimage grid and of the microlens grid in each case in at least one spatial direction are less than 300 &#x3bc;m.

The invention concerns a film element having a replication layer (), wherein an optically active surface structure () is shaped in a first surface of the replication layer. The surface structure is formed in at least a first region of the film element () by a first diffractive surface relief () comprising a plurality of successive elements following a first envelope curve (), wherein the elements respectively comprise an element surface () arranged substantially parallel to a base surface and at least one flank adjoining the adjacent element surface or surfaces, the element surfaces () of adjacent elements are spaced in a direction perpendicular to the base plane, with a first optical spacing or a plurality of the first optical spacing, wherein the first optical spacing is between 150 nm and 800 nm, preferably between 150 nm and 400 nm. The first envelope curve () has a spatial frequency of between 100 L/mm and 2000 L/mm and an optical depth of more than 450 nm and the relief shape and the spatial frequency of the envelope curve () are so selected that the incident light is diffracted into one or more first directions to represent a first item of information, the color value of which is further determined by the first optical spacing.

Film element

The invention relates to a security element (). The security element () has a viewing side and a back side that is opposite the latter. The security element comprises at least one luminous layer () that can emit light (), and at least one mask layer () that, when the security element () is viewed from the viewing side, is arranged in front of the at least one luminous layer (). The at least one mask layer () has at least one opaque region () and at least two transparent openings (). The at least two transparent openings () has a substantially higher transmittance than the at least one opaque region () in respect of light () emitted by the at least one luminous layer (), preferably a transmittance that is at least 20% higher, particularly preferably a transmittance that is at least 50% higher.

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Baden, Switzerland

Wayne Robert Tompkin