Abstract:
The invention relates to a security element (1). The security element (1) has a visible face, and a rear side lying opposite said face. The security element includes at least one luminous layer (2), which can emit light (20), and at least one mask layer (4), which is arranged in front of the at least one luminous layer (2) when looking at the security element (1) from the visible face. The at least one mask layer (4) has at least one opaque region (5) and at least two transparent openings (41, 42). The at least two transparent openings (41, 42) have a significantly higher degree of transmission than the at least one opaque region (5) with respect to the light emitted (20) by the at least one luminous layer (2), preferably a degree of transmission higher by at least 20%, with a degree of transmission higher by at least 50% being especially preferred.
Abstract:
The invention relates to a multi-layered foil body (1) for marking a security document, in particular a banknote. The foil body (1) has at least one colour filter layer (2) and at least one change layer (4) with an electrically controllable transmittance and/or an electrically controllable colour. The change layer (4) can have liquid crystals (15), which are alignable in an electric field, such as a PDLC layer. The foil body (1) preferably comprises two differently coloured colour filter layers (2, 3) and a change layer (4) which is disposed therebetween. The invention furthermore relates to a security element (10) having at least one aforementioned foil body and a piezoelectric energy source (8) which controls the change layer (4).
Abstract:
Die Erfindung betrifft einen Mehrschichtkörper (2) mit einer transparenten ersten Schicht (13). In der transparenten ersten Schicht (13) sind in einem ersten Bereich (31) eine Vielzahl von Mikrolinsen (21) abgeformt, die gemäß eines Mikrolinsenrasters angeordnet sind. Weiterhin weist der Mehrschichtkörper (2) eine unterhalb der ersten Schicht (13) und in fester Lage zur ersten Schicht (13) angeordnete zweite Schicht (12) mit einer Vielzahl von Mikrobildern (22) auf, die gemäß eines Mikrobildrasters und jeweils in einer zumindest bereichsweisen Überlappung mit einer der Mikrolinsen (21) des Mikrolinsenrasters zur Generierung einer ersten optisch variablen Information angeordnet sind. Die Rasterweiten (41, 42) des Mikrobildrasters und des Mikrolinsenrasters sind jeweils in zumindest einer Raumrichtung kleiner als 300 µm.
Abstract:
The invention relates to a method for producing a multilayer body, having the following steps: a) providing a substrate film with a replication layer; b) molding a surface relief into a surface of the replication layer, said surface relief having the appearance of a three-dimensional free-form surface to the observer and being made in particular of lens-shaped structures that produce a magnifying, minifying, or distorting effect; c) applying a first metal layer onto the replication layer surface which forms the surface relief; d) wet-chemically applying an at least partly transparent spacer layer onto the metal layer; and e) applying a second metal layer onto the spacer layer. The invention further relates to a multilayer body produced in such a manner.
Abstract:
The invention relates to a method for producing security elements (1), to security elements (1), to a security document (2) comprising at least one security element (1), as well as to a transfer film (90) comprising at least one security element (1). According to the invention, a three-dimensional object is detected. A three-dimensional object surface profile (37) which is described by a function F(x, y) is defined, the function F(x, y) describing the distance between the surface profile (37) and a two-dimensional reference surface (32), through which coordinate axes x and y extend, at coordinate points x and y. A first microstructure (44) is defined in such a way that the structure height (43, 53) of the first microstructure (44) is limited to a predetermined value smaller than the maximum distance (31) between the surface profile (37) and the two-dimensional reference surface, and such that the first microstructure (44) provides an observer with a first optical perception that corresponds to the three-dimensional object surface profile (37) described by the function F(x, y). The first microstructure (44) is introduced into a layer of the security element (1), in particular by lithographic methods, in such a way that the first microstructure (44) of the layer of the security element (1) provides the observer with the first optical perception.
Abstract:
The invention relates to a multilayer body (1, 2, 3) and a method for producing a security element. The multilayer body has a metal layer (21). An optically active surface relief is formed on at least some regions of a first surface of the metal layer (21), said first surface facing the top of the multilayer body or forming the top of the multilayer body, and/or a second surface of the metal layer (21), said second surface facing the bottom of the multilayer body or forming the bottom of the multilayer body. The surface relief is formed by a first relief structure (61) in at least one first region (31 to 39) of the multilayer body. The first relief structure (61) has a sequence of elevations (612) and depressions (614) in at least one direction (617) determined by a corresponding azimuth angle, said elevations (612) successively following one another with a period P which is smaller than a visible light wavelength. The minima of the depressions (614) lie on a base surface, and the first relief structure (61) has a relief depth t which is determined by the distance between the maxima of the elevations (612) of the first relief structure (61) and 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 (61) is selected such that the coloration of the light (52, 53) which is incident on the first region (31 to 39) at at least one first angle of incidence and which is directly reflected by the metal layer (21) in the first region or directly transmitted through the metal layer is changed, in particular by means of the plasmon resonance of the metal layer together with the incident light.
Abstract:
The invention relates to a security element (2), more particularly in the form of a multilayered flexible film body, having a top side facing an observer and a rear side facing away from the observer, and to a method for producing said security element. The security element (2) comprises one or more light-emitting elements arranged in a first region (30) of the security element, said one or more light-emitting elements emitting light upon activation and being formed more particularly in each case by a self-luminous, electrically operated, display element. The security element (2) comprises one or more transmissive diffraction structures in the first region (30). In this case, the one or more transmissive diffraction structures are arranged in such a way that at least part of the light emitted by the activated one or more light-emitting elements transmits through at least one partial region of the transmissive diffraction structures.
Abstract:
A decorative element (2), more particularly in the form of a transfer film, a laminating film or a security thread, and a security document comprising a decorative element and a method for producing same are described. The decorative element (2) has a microstructure (4) that generates an optical effect in reflected light and/or in transmitted light. The microstructure (4) has in a first region (32) a base surface (40) and a plurality of base elements (41), which each have an element surface elevated or recessed relative to the base surface (40) and a flank arranged between the element surface and the base surface (40). The base surface (40) of the microstructure defines a base plane spanned by coordinate axes x and y. The element surfaces of the base elements (41) each run substantially parallel to the base plane. In at least one or a plurality of first zones of the first region (32), the element surfaces of the base elements (41) and the base surface (40) are spaced apart, in a direction running perpendicularly to the base plane (40) in the direction of a co-ordinate axis z, at a first distance, chosen such that more particularly as a result of interference of the light reflected at the base surface and the element surfaces in reflected light and/or more particularly as a result of interference of the light transmitted through the element surfaces and the base surface in transmitted light, a colour is generated in the one or the plurality of first zones, and wherein the base elements (41) are shaped and arranged in the first region (31, 32) in such a way that, by means of the base elements (41), the incident light is deflected by scattering and/or by diffraction from direct reflection or direct transmission or the zeroth order of diffraction in such a way that a second colour different from the first colour, more particularly a second colour complementary to the first colour, is generated upon viewing in direct reflection or direct transmission or in the zeroth order of diffraction.