摘要:
The present invention relates to a foil material for transfer to a target substrate, and methods for manufacturing such a foil material. In a method according to the present invention, a plastic substrate foil (32) is provided that is suitable for aligning liquid crystal material. To the substrate foil (32) is discontiguously applied a layer (34) comprising a liquid crystal material that is aligned.
摘要:
The present invention relates to a security element (20) for security papers, value documents and the like having a diffraction pattern that exhibits an embossed relief pattern (24, 26) and a coating layer (28, 32) that increases the visibility of the diffraction effect of the embossed relief pattern (24, 26). According to the present invention, the relief pattern (24, 26) is formed on the basis of a cholesteric liquid crystalline material (24) and the coating layer (28, 32) includes a reflective (28) and/or a high-index layer (32).
摘要:
A security element for securing value documents has a first light-polarizing layer that is present at least in some areas and includes a cholesteric liquid crystal material, that selectively reflects light having a predetermined circular polarization, and that selectively reflects light of a firs wavelength range in a first reflection direction and light of a second wavelength range having a second, different reflection direction. A second light-polarizing layer is present at least in some areas and selectively reflects light having the opposite circular polarization to the predetermined circular polarization and selectively reflects light of the first and second wavelength range in the first and second reflection direction, respectively. A semi-transparent filter layer on which the first and second light-polarizing layer are stacked, absorbs light from the visible spectral range and transmits light from the first and/or second wavelength range.
摘要:
The present invention relates to a security element for security papers, value documents and the like, having a micro-optical moiré magnification arrangement having a first motif image that consists of a planar periodic or at least locally periodic arrangement of a plurality of first micromotif elements (38) that produce a hidden piece of image information, and a planar periodic or at least locally periodic arrangement of a plurality of microfocusing elements (34) for the moiré-magnified viewing of the first micromotif elements of the motif image, the first micromotif elements (38) being formed from nematic liquid crystal material and forming a phase-shifting layer for light from a specified wavelength range, and the magnified moiré image being perceptible substantially only upon viewing the security element through a polarizer.
摘要:
A security element for securing valuable articles comprises an optically variable layer (18) that conveys different color impressions at different viewing angles, and a color-constant layer (17, 24). The optically variable layer (18) and the color-constant layer (17, 24) are stacked in a covering region (20), while at most one of the optically variable layer (18) and the color-constant layer (17, 24) is present outside (22) the covering region. The color impression of the stacked layers (18, 17, 24) in the covering region (20) and the color impression of the one layer (18) outside (22) the covering region are matched with each other when viewed at a predetermined viewing angle. Further, the color-constant layer comprises an ink layer (17) and a metal layer arranged below the ink layer (24).
摘要:
The present invention relates to a method for producing a security element (1), to a security element (1) obtainable by the method according to the invention, to transfer materials having the security elements according to the invention, and to objects of value secured by the security elements according to the invention. The security element (1) according to the invention has at least two functional layers (12, 22), whereby each functional layer forms a motif and the motifs are either congruent, or one motif represents a photographic negative of the other motif. In the method according to the invention, the motif of one functional layer (12) is transferred into the other functional layer (22) with the help of an adhesive layer (30). In so doing, there is reproduced in the adhesive layer an exact image of the motif of the first functional layer, and said image of the motif in the adhesive layer is in turn employed for reproducing an exact image of said motif or of its photographic negative in the second functional layer. The transfer of the motif from one functional layer into the other is achieved by the adhesive having areas of varying adhesive strength, induced by irradiation through the first functional layer, and bonding to the second functional layer only in the strongly adhesive areas. The non-bonded areas of the functional layer are removed.
摘要:
The present invention relates to a security element for security papers, value documents and the like, having a micro-optical moiré magnification arrangement having a first motif image that consists of a planar periodic or at least locally periodic arrangement of a plurality of first micromotif elements (38) that produce a hidden piece of image information, and a planar periodic or at least locally periodic arrangement of a plurality of microfocusing elements (34) for the moiré-magnified viewing of the first micromotif elements of the motif image, the first micromotif elements (38) being formed from nematic liquid crystal material and forming a phase-shifting layer for light from a specified wavelength range, and the magnified moiré image being perceptible substantially only upon viewing the security element through a polarizer.
摘要:
A security element for securing valuable articles comprises an optically variable layer (18) that conveys different color impressions at different viewing angles, and a color-constant layer (17, 24). The optically variable layer (18) and the color-constant layer (17, 24) are stacked in a covering region (20), while at most one of the optically variable layer (18) and the color-constant layer (17, 24) is present outside (22) the covering region. The color impression of the stacked layers (18, 17, 24) in the covering region (20) and the color impression of the one layer (18) outside (22) the covering region are matched with each other when viewed at a predetermined viewing angle. Further, the color-constant layer comprises an ink layer (17) and a metal layer arranged below the ink layer (24).
摘要:
The present invention relates to a security element for protecting valuable articles, having a first and a second authenticating feature. The first authenticating feature comprises a first arrangement having a plurality of focusing elements present in a first grid, and a second arrangement having a plurality of microscopic structures present in a second grid. Here, the first and second arrangement are disposed in such a way that the microscopic structures of the second arrangement are seen magnified when viewed through the focusing elements of the first arrangement. The second authenticating feature is machine and/or visually verifiable and is not influenced by the first arrangement of the first authenticating feature.
摘要:
The present invention relates to a method for producing a security element (1), to a security element (1) obtainable by the method according to the invention, to transfer materials having the security elements according to the invention, and to objects of value secured by the security elements according to the invention. The security element (1) according to the invention has at least two functional layers (12, 22), whereby each functional layer forms a motif and the motifs are either congruent, or one motif represents a photographic negative of the other motif. In the method according to the invention, the motif of one functional layer (12) is transferred into the other functional layer (22) with the help of an adhesive layer (30). In so doing, there is reproduced in the adhesive layer an exact image of the motif of the first functional layer, and said image of the motif in the adhesive layer is in turn employed for reproducing an exact image of said motif or of its photographic negative in the second functional layer. The transfer of the motif from one functional layer into the other is achieved by the adhesive having areas of varying adhesive strength, induced by irradiation through the first functional layer, and bonding to the second functional layer only in the strongly adhesive areas. The non-bonded areas of the functional layer are removed.