摘要:
The invention concerns a security element (3′) having a top side and an underside and a process for the production thereof. The security element has a transparent layer (33′) with a non-homogenous refractive index, in which a plurality of Bragg planes are formed by a refractive index variation. The transparent layer (33′) is of a layer thickness of between 5 μm and 200 μm and the transparent layer (33′) has a plurality of first zones (41) of a smallest dimension of less than 300 μm, which are arranged in accordance with a first grid raster in a one-dimensional or two-dimensional succession in mutually adjacent relationship and in which the Bragg planes of the transparent layer are respectively shaped to provide a respective transmissive optical imaging function.
摘要:
The invention concerns a security element (3′) having a top side and an underside and a process for the production thereof. The security element has a transparent layer (33′) with a non-homogenous refractive index, in which a plurality of Bragg planes are formed by a refractive index variation. The transparent layer (33′) is of a layer thickness of between 5 μm and 200 μm and the transparent layer (33′) has a plurality of first zones (41) of a smallest dimension of less than 300 μm, which are arranged in accordance with a first grid raster in a one-dimensional or two-dimensional succession in mutually adjacent relationship and in which the Bragg planes of the transparent layer are respectively shaped to provide a respective transmissive optical imaging function.
摘要:
Described is a process for the production of a multi-layer body having a volume hologram with at least two different items of image information, wherein a photosensitive layer (46) of the multi-layer body is directly or with the interposition of a transparent optical medium (44s, 45) brought into contact with the front side of a master (44), in which interlaced regions with different asymmetrical surface structures or kinoform structures are shaped, which embody the at least two different items of image information. The photosensitive layer (46) and the master are exposed with a coherent light beam (47) whereby a volume hologram is formed in the photosensitive layer (46). Also described are a master for the production of the multi-layer body and a security element having said multi-layer body.
摘要:
Described is a process for the production of a multi-layer body having a volume hologram with at least two different items of image information, wherein a photosensitive layer (46) of the multi-layer body is directly or with the interposition of a transparent optical medium (44s, 45) brought into contact with the front side of a master (44), in which interlaced regions with different asymmetrical surface structures or kinoform structures are shaped, which embody the at least two different items of image information. The photosensitive layer (46) and the master are exposed with a coherent light beam (47) whereby a volume hologram is formed in the photosensitive layer (46). Also described are a master for the production of the multi-layer body and a security element having said multi-layer body.
摘要:
The invention concerns a process for producing a film element having mutually registered metallic layers (11, 16) and a film element which can be produced by such a process. A first metallic layer (11) provided on a first surface of a flexible single-layer or multi-layer carrier film (10) and a masking layer (13) provided on the second surface of the carrier film (10), opposite to the first surface, are structured in accurate register relationship with each other by means of mutually synchronized structuring procedures. After structuring of the first metallic layer (11) and the masking layer (13) one or more further layers are applied to the first metallic layer (11). Applied to the one or more further layers (15) is a second metallic layer (16) to which a first photoactivatable layer (17) is applied. The first photoactivatable layer (17) is structured by means of trans-exposure through the masking layer (13), the first metallic layer, the one or more further layers and the second metallic layer (16) from the side of the masking layer (13) by means of electromagnetic radiation of a wavelength to which the first photoactivatable layer (17) is sensitive, or the first photoactivatable layer is exposed controlledly through the masking layer from the side of the film body that is opposite to the masking layer.
摘要:
The invention concerns a process for producing a film element having mutually registered metallic layers (11, 16) and a film element which can be produced by such a process. A first metallic layer (11) provided on a first surface of a flexible single-layer or multi-layer carrier film (10) and a masking layer (13) provided on the second surface of the carrier film (10), opposite to the first surface, are structured in accurate register relationship with each other by means of mutually synchronized structuring procedures. After structuring of the first metallic layer (11) and the masking layer (13) one or more further layers are applied to the first metallic layer (11). Applied to the one or more further layers (15) is a second metallic layer (16) to which a first photoactivatable layer (17) is applied. The first photoactivatable layer (17) is structured by means of trans-exposure through the masking layer (13), the first metallic layer, the one or more further layers and the second metallic layer (16) from the side of the masking layer (13) by means of electromagnetic radiation of a wavelength to which the first photoactivatable layer (17) is sensitive, or the first photoactivatable layer is exposed controlledly through the masking layer from the side of the film body that is opposite to the masking layer.
摘要:
The invention relates to a document of value, in particular a credit card, identity card or ticket, and to a transfer film for the production of a document of value. The latter has on one of its surfaces a security element (2), which has a magnetic layer (25) for storing machine-readable information and a reflective, non-magnetizable metal layer (23). The metal layer is arranged above the magnetic layer (25) in relation to the surface of the document of value. The metal layer and the magnetic layer overlap, at least in some regions. The region of the metal layer (23) that overlaps the magnetic layer (25) is subdivided into at least two regions (231) isolated electrically from one another.
摘要:
The invention concerns a process for the production of a region-wise metallization on a carrier substrate, wherein the carrier substrate is at least region-wise provided with a soluble colored first layer which on its side remote from the carrier substrate is provided over its full area with a metal layer, as well as a transfer film with a region-wise metalization and the use thereof.
摘要:
The invention concerns an optically variable element, in particular an optically variable safeguard element for safeguarding banknotes, credit cards and the like, and a security product and a foil, in particular an embossing foil or a laminating foil, with such an optically variable element. The optically variable element has a thin film layer (54, 55, 58) for producing color change by means of interference and a further layer (51, 52, 53, 59). The thin film is in the form of a partial thin film element which covers the surface region of the further layer only in region-wise and pattern-shaped manner.
摘要:
The invention relates to an optically variable element, in particular an optically variable safeguard element for safeguarding banknotes, credit cards and the like. The invention also relates to a security product and a foil, in particular an embossing foil or a laminating foil, having such an optically variable element. The optically variable element has a thin film for producing color shifts by means of an interference and/or a reflective layer. The optically variable element further has a transparent window. The interference film and/or the reflective layer include a partial element, namely a partial thin film element or a partial reflective element, respectively. The partial element or elements surround the surface region of the transparent window.