Abstract:
The invention relates to a security element (10) for RF identification, and to a security document provided with one such security element (10). Said security element comprises a flexible film body (104) in which an electronic circuit for storing security-related information, and an RF antenna connected to said circuit, are integrated, said RF antenna being used for the non-contact communication between the electronic circuit and a test device. A first optically variable element (102) is permanently fixed to a surface of the flexible film body (104), said optically variable element at least partially covering the region of the flexible film body in which the electronic circuit is arranged. A second optically variable element is permanently fixed to the other opposite surface of the flexible film body.
Abstract:
The invention relates to a multi-layer body (7) having a carrier substrate (750) and having a transparent layer (720), which is arranged at least partially in a window (70) or in a transparent region of the carrier substrate (750). The transparent layer (720) comprises at least one first (71a) and one second partial region (71b) having a varying refractive index, arranged next to each other in the layer plane formed by the transparent layer (720) and at least partially in the window (7) or in the transparent region of the carrier substrate (75). Each partial region (71a, 71b) comprises a plurality of periodically arranged knots, forming an element with an optical effect and formed by refractive index variation, arranged in planes running substantially parallel to each other. The planes in the at least one first partial region (71a) are not parallel to the planes in the at least second partial region (71b). In at least one of the partial regions (71a, 71b) the planes neither run in parallel nor perpendicular to the layer plane. Thus, the incident light on the front and also on the back of the multi-layer body (7) is diffracted due to the elements with an optical effect and the elements form an optical effect that differs in the front view and in the rear view in incident light.
Abstract:
The invention relates to a security document (1) with a flexible support (10) and a multi-layer flexible film body (2) applied to the support, providing one or more optical security features. The flexible multi-layer film body (2) comprises an electrically-controlled display element for the generation of an optical security feature with a provided electrical power supply for operation of the display element in combination with an optically-active diffractive structure.
Abstract:
The invention relates to a security document (7) with a first transparent area (72), inside of which a first transparent optical element (74) is placed, and with a second area (71), inside of which a second opaque optical element (73) is placed. The second opaque optical element (73) exhibits a first optical effect. The first area (72) and the second area (71) are placed in an interspaced manner on a support (75) of the security document whereby enabling the first and second areas to be superimposed. When the second optical element is overlapped by the first optical element with a first distance (26) between the first and second optical elements, a second optical effect is produced, and when the second optical element is overlapped by the first optical element with a second distance (25) between the first and the second optical elements, which is greater than the first distance (26), a third optical effect (51) is produced that differs from the second optical effect.
Abstract:
The invention relates to a method for producing a multilayer body (100) having a partially molded first layer (3m). The method is characterized in that a diffractive first relief structure having a high depth/width ratio of the individual structure elements, especially a depth/width ratio of > 0.3, is molded into a first area (5) of a replicating layer (3) of the multilayer body and the first layer (3m) is applied with a constant surface density to the replicating layer (3) in the first area (5) and in a second area (4, 6) in which the first relief structure is not molded into the replicating layer (3), and the first layer (3m) is partially removed depending on the first relief structure, so that the first layer (3m) is partially removed in the first area (5) or in the second area (4, 6) but not in the second (46) or in the first area (5).
Abstract:
The invention relates to a security element (13) provided in the form of a multilayered film body, to a security document provided with a security element of this type, and to a method for producing this security element. The film body comprises a replicating paint layer (22) and a thin-film layer (23), that by means of interference, produces a color shift effect that occurs as the angle of vision changes. A first relief structure (27) is shaped in a first area (35, 37) in the interface between the replicating paint layer (22) and the thin-film layer (23). This relief structure is designed to suppress the production of the color shift effect via the thin-film layer (23) so that the color shift effect does not occur in the first area (23, 27), in which the first relief structure (27) is provided, and the color shift effect produced by the thin-film layer (23) occurs in a second area (34, 36, 38, 39) of the security element (13), in which the first relief structure (27) is not provided.
Abstract:
The invention relates to an optical security element comprising a substrate layer, into some areas of a planar zone (2) of which a first microstructure is molded so as to create a first, optically recognizable effect. Said planar zone (2) is divided into microscopically fine pattern regions (21 to 40) and a background region (20), the first microstructure being molded into the pattern region (21 to 40) but not into the background region (20). The microscopically fine pattern regions (21 to 40) in the planar zone (2) are arranged in the form of a moiré pattern into which a hidden piece of information that can be evaluated by means of an allocated verification element is encoded as a security feature. The microscopically fine pattern regions (21 to 40) are also substructured according to a substructuring function that describes a microscopic substructure of the moiré pattern, which is used as an additional security feature.
Abstract:
The invention relates to a difficult-to-copy security element (2) that comprises a composite structure (1) with microscopically fine, optically effective structures (9) of a pattern that are embedded between two layers (5; 6) of the composite structure (1). In a plane defined by coordinate axes x and y of the pattern, in a boundary layer (8) between the layers (5; 6), the optically effective structures (9) are molded into subareas of a holographically not copiable security feature. In at least one subarea, the optically effective structure (9) is a diffractive structure (S, S*, S**) produced by additive overlay of a macroscopic overlay function (M) with a microscopically fine relief profile (R). Both the relief profile (R), the overlay function (M) and the diffractive structure (S, S*, S**) are functions of the coordinates x and y. The relief profile (R) is a light-diffractive or light-scattering optically effective structure (9) and maintains, following the overlay function (M), the predetermined profile height. The overlay function (M) is at least partially continuous and no periodic delta function or boxcar function. As compared to the relief profile (R), the overlay function (M) progresses slowly. When the composite structure (1) is tilted and turned, the observer perceives in the highlighted subareas bright, continuously moving stripes that depend on the direction of observation.
Abstract:
The invention relates to a security element (2) to be glued onto a document (3), which comprises a plastic composite structure (1) and embedded, optically effective structures of a pattern (4). The optically effective structures in subareas (13) of the pattern (4) lie in a reference plane of the composite structure (1) defined by a coordinate axis (x; y) and are molded into a reflective boundary layer. Said boundary layer is embedded between a transparent molding layer and a protective layer of the composite structure (1). At least one subarea (13) has a dimension of larger 0.4 mm and has at least one molded macrostructure (M) in the boundary layer, which macrostructure is an at least partially continuous and differentiated function of the coordinates (x; y). The macrostructure (M) is curved in at least subareas and is no periodic delta function or boxcar function. In the subarea (13), neighboring extreme values of the macrostructure (M) are at least 0.1 mm apart from one another. When the pattern is radiated with light, an optically variable pattern of light reflections is visible on the security element (2) when changing the visual angle.
Abstract:
A diffractive security element (2) is subdivided into partial surfaces that have an optically active structure (9) at boundary surfaces while being embedded between two layers of a layer composite (1) made of plastic. At least the base layer (4) of the layer composite (1) that is to be illuminated is transparent. The optically active structure (9) comprises, as a basic structure, a diffraction grating of the zero order with a period length of no greater than 500 nm. Inside at least one of the partial surfaces, an integrated optical waveguide (5) having a layer thickness (s) and made of a transparent dielectric is embedded between the base layer (4) and an adhesive layer (7) of the layer composite (1) and/or a protective layer (6) of the layer composite (1), whereby the profile depth of the optically active structure (9) is a predetermined proportion of the layer thickness (s). When illuminated with white incident light (13) in the zero diffraction order, the security element (2) produces diffracted light (14) of a high intensity and intensive color.