# US 12,109,834 B2 · See-through security element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,834 B2 - Document ID: US12109834B2 - Status: Granted - Kind: B2 - Application number: 17/616,888 - Filed: 2020-06-04 - Published: 2022-10-13 - Granted: 2024-10-08 - Earliest claimed: 2019-06-06 - Assignees: Leonhard Kurz Stiftung & Co. KG; OVD Kinegram AG - Applicants: LEONHARD KURZ Stiftung & Co. KG; OVD Kinegram AG - Inventors: Juri Attner; Philipp Schuler; René Staub; Harald Walter; Klaus Weber - Web page: https://patentgrep.com/patent/US12109834B2 ## CPC - B42D 25/351: Translucent or partly translucent parts, e.g. windows - B42D 25/324: Reliefs - B42D 25/373: Metallic materials - B42D 25/41: using electromagnetic radiation (B42D25/435 takes precedence) - B42D 25/445: using chemical means, e.g. etching - B42D 25/328: Diffraction gratings; Holograms - B42D 25/364: Liquid crystals - B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS ## Abstract A see-through security element (2), a security document (1) and a method for producing a see-through security element (2). The see-through security element has a first element with one or more transparent first partial areas and at least one reflective second partial area. The see-through security element has a second element with one or more first partial areas, which in each case in transmission form a color filter matched to a respectively assigned color, and has at least one second partial area, which is formed colorless, in particular colorless transparent, or in transmission and/or reflection forms a color filter which is matched to a color which is not assigned to any of the one or more first partial area of the second element. The first partial areas of the first element and the first partial areas of the second element at least partially overlap. ## Claims ### Claim 1 A see-through security element with a front side formed by a first main surface of the see-through security element and a rear side formed by a second main surface of the see-through security element, wherein the see-through security element has at least one first area and/or at least one second area, when viewed perpendicular to the plane spanned by the first main surface, wherein the see-through security element has a first element, which has one or more transparent first partial areas and at least one reflective second partial area, wherein the see-through security element has a second element, which has one or more first partial areas, which in each case in transmission form a color filter matched to a respectively assigned color, and has at least one second partial area, which is formed colorless, or in transmission and/or reflection forms a color filter which is matched to a color which is not assigned to any of the one or more first partial areas of the second element, wherein the first partial areas of the first element and the first partial areas of the second element at least partially overlap when viewed perpendicular to the plane spanned by the first main surface, and wherein, when viewed perpendicular to the plane spanned by the first main surface, one or more of the first partial areas of the second element at least partially overlap one or more second partial areas of the first element, and wherein the see-through security element has a third element, the third element having one or more transparent first partial areas and at least one reflective second partial area, and wherein the second element is arranged in the see-through security element between the first element and the third element, and wherein the at least one second partial area of the third element is formed by at least one metallic layer or a sequence of layers comprising at least one metallic layer. ### Claim 2 (depends on 1) The see-through security element according to claim 1, wherein, in the first area of the see-through security element, one or more first partial areas of the first element and one or more first partial areas of the second element are arranged register-accurate relative to one another when viewed perpendicular to the plane spanned by the first main surface such that, when viewed in transmitted light, in the first area a first colored feature becomes visible. ### Claim 3 (depends on 1) The see-through security element according to claim 1, wherein, in the second area of the see-through security element, at least one of the first partial areas of the first element and at least one of the first partial areas of the second element are arranged register-accurate relative to one another when viewed perpendicular to the plane spanned by the first main surface such that, when viewed in transmitted light, in the second area a second colored feature becomes visible, which directly adjoins a third feature visible when viewed in reflected light from the front side and/or rear side. ### Claim 4 (depends on 1) The see-through security element according to claim 1, wherein, in the first and/or second area of the see-through security element, the first partial areas of the second element in each case have an overlap of not more 100 μm, with the at least one second partial area of the first element, when viewed perpendicular to the plane spanned by the first main surface. ### Claim 5 (depends on 1) The see-through security element according to claim 1, wherein, in the first and/or second area of the see-through security element, the first partial areas of the second element do not overlap with the at least one second partial area of the first element, when viewed perpendicular to the plane spanned by the first main surface. ### Claim 6 (depends on 1) The see-through security element according to claim 1, wherein, in the first and/or second area of the see-through security element, the at least one second partial area of the first element and the one or more first partial areas of the second element, when viewed perpendicular to the first main surface, adjoin each other without overlapping and with a gap with a width S of less than 300 μm. ### Claim 7 (depends on 1) The see-through security element according to claim 1, wherein, in the first area of the see-through security element, the one or more first partial areas of the first element are in each case completely surrounded by the at least one second partial area of the first element, and/or wherein, in the first area of the see-through security element, the one or more first partial areas of the second element are in each case completely surrounded by the at least one second partial area of the second element. ### Claim 8 (depends on 1) The see-through security element according to claim 1, wherein, in the first area of the see-through security element, the one or more first partial areas of the first element provided there and/or the one or more first partial areas of the second element provided there in each case have a dimension of less than 500 μm, in at least one lateral direction. ### Claim 9 (depends on 1) The see-through security element according to claim 1, wherein, in the first area the one or more first partial areas of the first element and the one or more first partial areas of the second element, in each case have a dimension between 5 μm and 300 μm, in at least one lateral direction. ### Claim 10 (depends on 1) The see-through security element according to claim 1, wherein, in the first area of the see-through security element, the first partial areas of the second element are in each case superposed with an assigned first partial area of the first element when viewed perpendicular to the plane spanned by the first main surface. ### Claim 11 (depends on 1) The see-through security element according to claim 1, wherein, in the first area, the one or more first partial areas of the first element and the one or more first partial areas of the second element are in each case shaped as a line and/or a raster element. ### Claim 12 (depends on 11) The see-through security element according to claim 11, wherein the raster elements are shaped as square, circular disk-shaped, rectangular and/or elliptical raster elements and/or as a raster element which forms an alphanumeric character. ### Claim 13 (depends on 1) The see-through security element according to claim 1, wherein, in the first and/or second area, the one or more first partial areas of the first element and the one or more first partial areas of the second element are in each case shaped as a thin, continuous line or portions of a line. ### Claim 14 (depends on 1) The see-through security element according to claim 1, wherein, in the first area, the one or more first partial areas of the first element are arranged in the form of a one- or two-dimensional raster. ### Claim 15 (depends on 14) The see-through security element according to claim 14, wherein the raster elements of the raster form a motif or partial motif of the first feature. ### Claim 16 (depends on 1) The see-through security element according to claim 1, wherein the raster is a linear raster in which the raster elements follow on from each other in the direction of a line. ### Claim 17 (depends on 1) The see-through security element according to claim 1, wherein the raster width of the raster and/or the size of the raster dots and/or the spacing of the lines and/or the width of the lines is varied locally. ### Claim 18 (depends on 1) The see-through security element according to claim 1, wherein, in the first area of the see-through security element, one or more first partial areas of the first element and one or more first partial areas of the second element are arranged relative to one another when viewed perpendicular to the plane spanned by the first main surface such that, when viewed in transmitted light in the first area, a first colored feature becomes visible, and wherein a design of the first colored feature is determined by the arrangement of the first partial areas of the first element and/or the first partial areas of the second element. ### Claim 19 (depends on 18) The see-through security element according to claim 18, wherein the first area of the see-through security element is the smallest possible rectangular area in which every edge of the rectangular area adjoins the first colored feature in each case at least at one point, when viewed perpendicular to the plane spanned by the first main surface. ### Claim 20 (depends on 18) The see-through security element according to claim 18, wherein, the at least one first partial area of the second element forms a motif which differs from the design of the overlapped first partial area of the first element and becomes visible in the second area as a colored second feature when viewed in transmitted light. ### Claim 21 (depends on 20) The see-through security element according to claim 20, wherein, in the second area, a fourth feature determined by the design of at least one of the first partial areas of the first element becomes visible when viewed in transmitted light. ### Claim 22 (depends on 20) The see-through security element according to claim 20, wherein, in the first and/or second area, a third feature determined by at least one of the second partial areas of the first element becomes visible when viewed in reflected light from the front side and/or a third feature determined by at least one of the second partial areas of the first element becomes visible when viewed in reflected light from the rear side. ### Claim 23 (depends on 1) The see-through security element according to claim 1, wherein the surface proportion F of the one or more first partial areas of the first element is smaller than 20%, wherein the surface proportion F is the ratio of the surface area of the first area which is occupied by the one or more first partial areas of the first element to the surface area of the first area which is occupied by the one or more first partial areas and the at least one second partial area of the first element. ### Claim 24 (depends on 1) The see-through security element according to claim 1, wherein the at least one second partial area of the first element completely surrounds the first area of the see-through security element, when viewed perpendicular to the plane spanned by the first main surface. ### Claim 25 (depends on 24) The see-through security element according to claim 24, wherein, starting from the first area of the see-through security element, the at least one second partial area of the first element completely surrounds the first area of the see-through security element by at least a distance d, when viewed perpendicular to the plane spanned by the first main surface, wherein d is larger than 0.5 mm. ### Claim 26 (depends on 1) The see-through security element according to claim 1, wherein in the second area of the see-through security element, at least one of the first partial areas of the second element overlaps with a first partial area of the first element when viewed perpendicular to the plane spanned by the first main surface such that the at least one first partial area of the second element only partially overlaps the first partial area of the first element. ### Claim 27 (depends on 1) The see-through security element according to claim 1, wherein, when viewed perpendicular to the plane spanned by the first main surface, the first partial areas of the first element and the first partial areas of the third element at least partially overlap, and/or wherein, when viewed perpendicular to the plane spanned by the first main surface, the at least one second partial area of the first element and the at least one second partial area of the third element at least partially overlap, are superposed. ### Claim 28 (depends on 1) The see-through security element according to claim 1, wherein, when viewed perpendicular to the plane spanned by the first main surface, one or more of the first partial areas of the second element at least partially overlap one or more second areas of the third element. ### Claim 29 (depends on 1) d) The see-through security element according to claim 1, wherein the one or more first partial areas of the first element and/or third element have a reflectivity of more than 10%, averaged over the visible wavelength range. ### Claim 30 (depends on 1) The see-through security element according to claim 1, wherein the at least one second partial area of the first element and/or of the third element is formed by at least one metallic layer or a sequence of layers comprising at least one metallic layer. ### Claim 31 (depends on 1) The see-through security element according to claim 1, wherein the at least one second partial area of the first element and/or of the third element has a second relief structure and at least one reflective layer, which follows the contour of the second relief structure on at least one main surface. ### Claim 32 (depends on 31) The see-through security element according to claim 31, wherein, when viewed in reflected light from the front side and/or rear side, the second relief structure provides an optically variable feature. ### Claim 33 (depends on 31) The see-through security element according to claim 31, wherein, in the first area of the see-through security element, one or more first partial areas of the first element and one or more first partial areas of the second element are arranged relative to one another when viewed perpendicular to the plane spanned by the first main surface such that, when viewed in transmitted light in the first area, a first colored feature becomes visible, and wherein, when viewed in transmitted light, the second relief structure provides an optically variable feature and/or an optically variable design elements in the first colored feature when viewed in transmitted light. ### Claim 34 (depends on 1) The see-through security element according to claim 1, wherein the one or more first partial areas of the first element and/or of the third element have a first relief structure. ### Claim 35 (depends on 1) The see-through security element according to claim 1, wherein, in the first and/or second area of the see-through security element, the first partial areas of the second element are assigned to two or more groups of first partial areas, and wherein a respective color is assigned to each of the groups of first partial areas, wherein the colors assigned to the groups differ from each other, and the color filter which is formed in the respective first partial areas is matched to the respectively assigned color. ### Claim 36 (depends on 1) The see-through security element according to claim 1, wherein, in each case a first color is assigned to a first group of first partial areas of the second layer, and wherein, in each case a second color is assigned to a second group of first partial areas of the second layer, and wherein the first and second colors differ from each other. ### Claim 37 (depends on 1) A method for producing a see-through security element according to claim 1, wherein, one or more color layers, the solubility and/or color filtering effect of which are altered by means of exposure to light, are applied to the first element and wherein the one or more color layers are exposed to light through the first element using the first element as exposure mask. ### Claim 38 (depends on 37) The method for producing a see-through security element according to claim 37, wherein the first element has at least one metal layer, which is not provided in the one or more first partial areas of the first element. ### Claim 39 (depends on 37) The method for producing a see-through security element according to claim 37, wherein one or more of the color layers are formed in each case by a dyed negative photoresist. ### Claim 40 (depends on 1) A security document with a see-through security element according to claim 1.