WO2023169714A1 - Élément de sécurité pour un document de valeur, document de valeur et procédé de production d'un élément de sécurité - Google Patents

Élément de sécurité pour un document de valeur, document de valeur et procédé de production d'un élément de sécurité Download PDF

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Publication number
WO2023169714A1
WO2023169714A1 PCT/EP2023/025105 EP2023025105W WO2023169714A1 WO 2023169714 A1 WO2023169714 A1 WO 2023169714A1 EP 2023025105 W EP2023025105 W EP 2023025105W WO 2023169714 A1 WO2023169714 A1 WO 2023169714A1
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WO
WIPO (PCT)
Prior art keywords
micro
image
elements
layer
security element
Prior art date
Application number
PCT/EP2023/025105
Other languages
German (de)
English (en)
Inventor
Matthias Pfeiffer
Peter Schiffmann
Michael Rahm
Christian Fuhse
Andreas Rauch
Moritz HÖFER
Original Assignee
Giesecke+Devrient Currency Technology Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Giesecke+Devrient Currency Technology Gmbh filed Critical Giesecke+Devrient Currency Technology Gmbh
Publication of WO2023169714A1 publication Critical patent/WO2023169714A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • 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
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • 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
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows

Definitions

  • the invention relates to a security element for a document of value, the security element having a substrate body which has a front and a back side, and a see-through element which presents a see-through image to a viewer.
  • Such a security element is already known from EP 3268235 B1.
  • a document of value is disclosed which has a paper strip embedded in its substrate body, which has a see-through element which presents the viewer with a see-through image.
  • a security element for a document of value which has a substrate body that has a front and a back side and a see-through element that presents a see-through image to a viewer.
  • the see-through element has micro-image elements and first micro-image elements and second micro-image elements arranged alternately in a micro-image layer, the micro-image layer being applied to the front or back of the substrate body or embedded in it and the micro-image elements display the micro-image elements. form.
  • the first micro-image elements, together with the micro-imaging elements spatially correspondingly assigned to them, provide a first view of the transparent image that can be recognized from a first viewing angle range
  • the second micro-image elements, together with the micro-imaging elements spatially correspondingly assigned to them provide a second view of the transparent image that can be seen from a second viewing angle range
  • the microimage elements are arranged such that the views are nested within one another with respect to the microimage layer, and the first view differs in its translucency from the second view.
  • the micro imaging elements ensure that the first and second micro image elements and thus the views generated by them are visible from a respective, defined first or second viewing angle range. Outside the viewing angle range, they cannot be seen with the naked eye.
  • the first viewing angle range the first view of the transparent image is visible due to the interaction of micro-imaging elements and first micro-image elements; in the second viewing angle range, the second view of the transparent image is visible due to the interaction of the micro-imaging elements with the second micro-image elements.
  • Each view of the transparent image is assigned a specific viewing angle range in which the respective view can be seen.
  • the viewing angle ranges of the multiple views can overlap or be the same, that is, from certain viewing angles, multiple views can be visible at the same time. However, they are preferably separated, in particular completely.
  • the first and second micro-image elements are nested, that is, they are designed, for example, in the form of a large number of vertically or horizontally extending channels in the micro-image layer, with a channel with second micro-image elements following a channel with first micro-image elements, etc.
  • the first micro-image elements and the second micro-image elements represent different types.
  • the number of types of micro-image elements and thus the views that can be perceived from different viewing angles is not limited to two. Three, four, five, etc. types of microimage elements are possible.
  • the transparent image usually has as many views as there are types of micro image elements -
  • a see-through image is the visible image that the viewer perceives in transmitted light.
  • the see-through element refers to the structure that creates the respective see-through image. It is composed of the micro-image elements and the micro-image layer, which has the alternately arranged micro-image elements. Due to the interaction of the microimage layer with the microimaging elements, the see-through element presents the viewer with a viewing angle-dependent see-through image, namely the different views. It differs from a traditional see-through image in that it has views that depend on the viewing angle.
  • the substrate body preferably consists of paper or a polymer. If the substrate body is a paper substrate, it consists of vegetable fibers such as cotton, linen, abacca, etc. and/or synthetic fibers. As well Polymer substrates such as BOPP or PET are used as substrate bodies. Film composite substrates are also possible.
  • the see-through element which has the micro-imaging elements and the micro-image layer, is located on the front or back of the substrate body or embedded in it.
  • the multiple types of micro-image elements are provided in the micro-image layer, each of which, in interaction with the micro-image elements, provide the views for the see-through image, the multiple views differing in their tonality or opacity.
  • the see-through element has the micro-imaging elements matching the micro-image layer, which are arranged above the micro-image layer, i.e. in a viewing direction upstream of the micro-image layer.
  • the micro imaging elements ensure that when the viewing angle changes in transmission, the first and/or the second type of micro image elements and thereby the first and/or second view can be seen.
  • the see-through element thereby provides the see-through image depending on the viewing angle.
  • Views when viewed in reflection preferably have the same color impression, which in embodiments corresponds to the color impression of the background, for example that of the substrate body.
  • the first and second views have the form of a text, an image, a pattern, etc. However, the first view differs from the second view in its opacity or translucency, so that the two views can be distinguished in transmission in addition to the viewing angle dependence.
  • the first and second microimage elements essentially have the same color impression. This ensures camouflage of the transparent image when viewed in reflected light, whereas when viewing the security element in transmission, the two views are perceived as different motifs for the transparent element, depending on the viewing angle. Due to the micro-imaging elements arranged upstream of the micro-image layer, the micro-image elements of the micro-image layer become dynamic, ie dependent on the viewing angle. This increases security against forgery.
  • the security element has a first camouflage layer and a second camouflage layer, the microimage layer being located between the first camouflage layer and the second camouflage layer.
  • the first camouflage layer and/or the second camouflage layer is a color-accepting layer.
  • the microimage layer By arranging the microimage layer in a layer sequence between the first and the second camouflage layer, the effect of camouflage of the transparent image on both sides is improved and thus the visibility of the transparent image when viewing the security element in reflection, i.e. in reflected light, is reduced.
  • the first camouflage layer and/or the second camouflage layer are particularly preferably applied in a grid. This further improves the camouflage effect; ie the visibility of the transparent image when viewed in reflection is reduced.
  • the micro imaging elements of the transparent image can be designed differently.
  • the microimaging elements are spherical lenses. They can be arranged in different grid geometries in parts of the security element. Hexagonal, square or parallelogram-shaped grids, but also a chaotic arrangement, are possible as grid geometry. Lenses with a regular or irregular outline or 3D profile are also possible. In further embodiments, the microimaging elements may be Fresnel lenses.
  • the microimaging elements can be prisms that produce a flip effect. Like the lenticular lenses, these can also be aligned differently in different areas of the security element.
  • the micro imaging elements can also be a perforated grid or grid, or a locally and/or demetallized layer in a grid.
  • the hole size or the area ratio of metallized to demetallized areas can vary depending on the position in order to convey locally different brightness and sharpness/blur impressions.
  • the substrate body is preferably made of polymer. Anti-counterfeiting effects can then be created in different variants with the see-through element.
  • Such a see-through element, encompassed by a security element with a substrate body made of polymer, is also referred to here as a dynamic pseudo-watermark.
  • the dynamic pseudo watermark at least two (but not necessarily all) types of micro image elements produce the same color impression when viewed in reflection and thus a uniform motif, whereas when viewed in transmission, the different views can be recognized due to the different tonality.
  • the ink-accepting layer is printed in the same color in which the views appear and in a grid so that brighter areas in transmission, i.e. areas without grid overprinting, are better recognized than areas in which the grid is printed (raster printing -areas).
  • a transparent image constructed from the multiple views of the transparent image is printed and underprinted or overprinted with the color acceptance layer over the entire surface, with an opaque white color being particularly preferred as the color acceptance layer.
  • the full-surface application of the ink-accepting layer essentially produces the same effect as the application of the ink-accepting layer as a grid in the first variant, namely the camouflage of the transparent image.
  • the overpressure or underpressure with the color-accepting layer reduces the visibility of the transparent image when viewed in reflection (the transparent image is camouflaged), whereas the transparent image becomes visible when viewed in transmission.
  • the microimage elements are printed using reflective ink; Metal pigment paint is particularly preferably used here.
  • microimage layer printed with the reflective color (made up of the alternately arranged types of microimage elements) is then covered and suppressed on both sides with a color acceptance layer (in particular an opaque white color), so that the multiple views are not visible when viewed in reflection, but are visible when viewed in Transmission can be seen with very high contrast.
  • a color acceptance layer in particular an opaque white color
  • a film can also be applied as a micro-image layer, which already has the micro-image elements, i.e. as a transfer element, for example, has the two micro-image elements in the form of metallized and demetallized areas.
  • the microimage layer is applied to the substrate body by film transfer.
  • the micro-image elements of the micro-image layer can be printed in multiple or true colors, with an opaque white color being overlaid and suppressed on both sides for camouflage, so that when viewed in reflection, the colorful motif, which emerges from the multiple views of the The transparent image cannot be seen, but only when viewed in transmission.
  • the substrate body can also be made of paper. In the understanding of this application, it is then referred to as a real watermark.
  • the transparent element is overprinted with a grid, whereby the external color impression of the grid is the same as the surrounding color of the substrate body, so that the overprint with the grid is hardly noticeable when viewed in reflection, but the raster print areas are noticeable when viewed in transmission are significantly more opaque than the non-overprinted translucent areas.
  • a true watermark is produced as a high-resolution interleaved multi-channel see-through element using high-resolution watermarking technology (e.g. 3D printed screen or screen inserts), with a micro-imaging element having the dimension of the width of two channel-shaped micro-image elements.
  • the real watermark can also be produced using high-resolution laser etching, whereby high-resolution microimage elements are interleaved using the multiple channels (a dynamic, interleaved multi-channel see-through element is created).
  • the microimaging elements make the high-resolution microimage elements dependent on the viewing angle, creating a dynamic effect in the multiple views that together form the see-through image.
  • the microimaging elements can also be created as in the third variant of the pseudowatermark - i.e. by printing or applying as a transfer element - although overprinting is also recommended here to camouflage the micropartial images.
  • the transparent element is a real watermark (the substrate body is made of paper)
  • the first view can represent a laterally structured motif
  • the second view does not represent a further structured motif (possibly
  • a second view would be a surface in a uniform color), which creates the effect that the first view (i.e. the subject) appears as a see-through image and disappears when tilted when changing from the first to the second viewing angle range.
  • the first view can have a first motif and the second view can have a second motif, so that when viewed in transmission when the security element is tilted and an associated change from the first to the second viewing angle range, a flipping image appears between the two motifs arise.
  • the first view can also show a positive motif and the second view a negative motif, so that when viewed in transmission a positive-negative flip occurs when tilted.
  • the see-through element i.e. the dynamic pseudo-watermark and the real watermark
  • the see-through element is much more attractive than a conventional, i.e. static see-through element without micro-image elements.
  • the see-through element the most well-known security element of a banknote, is thus greatly enhanced.
  • the authenticity check has been improved.
  • the barrier to counterfeiting is significantly increased by the dynamic design of the see-through element with micro imaging elements.
  • a conventional see-through element e.g. as a static background motif, can also be used so that it complements the dynamic see-through element and enhances the change from the first to the second view of the see-through image when the viewing angle range changes.
  • micro-imaging elements and the micro-image layer offset are arranged in the see-through element, whereby dynamic see effects such as B. a running effect, pumping or morphing can be created.
  • dynamic see effects such as B. a running effect, pumping or morphing
  • moire-enlarging effects and modulo mapping effects in combination with a tilting effect are also possible. This increases the complexity of the optical effect and thus the security against forgery.
  • the micro-imaging elements of the see-through element can provide additional views.
  • various optically variable effects can occur in the security element when tilting in different directions.
  • the dynamic effects of the see-through element and/or additional additional security elements can occur when tilting about the same and/or when tilting about different tilting axes.
  • Different tilt axes can advantageously be at right angles to one another.
  • the tilt axes often correspond to the longitudinal or transverse axis of the substrate body.
  • the preferred micro-imaging elements are an applied film with a perforated or striped grid in which periodically transparent or translucent and opaque areas alternate; Structured metallic coatings are particularly suitable in this context, e.g. B. a metal layer with round or strip-shaped openings or regularly arranged metallic thin-film elements such as plates or strips against a transparent background. The same optical effect can also be created by partially printing metallic pigments.
  • the micro imaging elements can be camouflaged by additional overprinting with opaque white. This prevents the elements from having a metallic shine and being easily distinguishable from the substrate even in reflection. Overprinting with opaque white serves to camouflage these elements.
  • film-based, optically variable security features can be easily implemented in the neighborhood, e.g. B. holograms, micromirrors with and without CS coating, etc.
  • film-based security features can also be used in the vicinity by application, but other print features are preferred, e.g. B. magnetically alignable effect pigments.
  • the other optically variable features may be designed to reveal their optical variability when tilted about the same or a different axis.
  • the microimage layer and/or the camouflage layers contain machine-readable substances.
  • the microimage layer and/or the first or second camouflage layer can contain hidden machine-readable feature substances, fluorescent, phosphorescent, magnetic or IR-absorbing or IR-transparent substances.
  • Transmission sensors with directed oblique lighting can then additionally detect the transparent image of the transparent element, which is made up of the several views, through image mapping under diffuse lighting. In this way, the see-through element can also be detected mechanically.
  • a document of value is also provided to which the security element according to the invention is applied as a patch or strip. It is also possible to apply the see-through element as a portion of an optically variable film element.
  • a method for producing a security element for a document of value in which a substrate body which has a front and a back and a see-through element which presents a see-through image to a viewer are provided.
  • the see-through element is provided with micro-imaging elements and first micro-image elements and second micro-image elements arranged alternately in a micro-image layer, the micro-image layer being applied to the front or the back of the substrate body, or embedded in it, and the micro-image elements being imaged by the micro-imaging elements.
  • a first view of the transparent image, recognizable from a first viewing angle, is imaged by the first microimage elements together with the microimaging elements.
  • a second view of the transparent image which can be seen from a second viewing angle, is imaged by the second micro-image elements together with the micro-image elements and the micro-image elements are arranged so that the views are nested with respect to the micro-image layer, and the first view differs in its translucency from the second View differs.
  • Fig. 10 micro imaging elements as prisms in isometric
  • Fig. 21 is a second view divided horizontally into channels
  • Fig. 22 is a horizontally interleaved two-channel image.
  • FIG. 1 to 3 show a sectional view of an embodiment of a security element 1 with a polymer substrate 2, which has a front side 3 and has a back 4.
  • An exemplary viewing direction B is also defined, from which a see-through element is viewed in transmission.
  • a microimage layer 5 is applied to the back 4 of the polymer substrate 2.
  • the microimage layer 5 comprises first microimage elements 6 and second microimage elements 8, which are nested within one another in the microimage layer 5.
  • a first camouflage layer 10 is arranged in a layer sequence further away from the back 4 of the polymer substrate 2.
  • a second camouflage layer 12 is arranged in the layer sequence adjacent to the front side 3 of the polymer substrate 2, which is followed by a layer of micro-imaging elements 14 in the layer sequence against the viewing direction B.
  • a see-through element 15 is formed from the micro imaging elements 14 and the micro image layer 5, in which the first micro image elements 6 and the second micro image elements 8 are arranged alternately. It offers the viewer a transparent image depending on the viewing angle.
  • FIG. 2 and 3 show a second embodiment for the security element 1, which have the same components as the security element 1 according to FIG. 1; they only differ in the sequence of layers.
  • the micro-imaging elements 14 are arranged on the front side 3 of the polymer substrate 2.
  • the first camouflage layer 10 rests on the back 4 of the polymer substrate 2, followed by the microimage layer 5 and the second camouflage layer 12.
  • the layer sequence in the security element 1 in the viewing direction B is: first camouflage layer 10 - polymer substrate 2 - microimage layer 5 - second camouflage layer 12; the microimaging elements 14 are embedded in the polymer substrate 2 in the embodiment of FIG.
  • the substrate body consists of a polymer (polymer substrate 2).
  • polymer substrates made of BOPP or PET, but also film composite substrates such as film/paper/film or paper/film/paper are possible.
  • a preferred embodiment variant which is not explicitly shown, consists in metallizing and demetallizing the two film layers surrounding the paper core in areas of film composite substrates.
  • one of the two foils contains the micro-image elements 6, 8 in the form of metallized and de-metallized areas, while the other foil also provides the micro-image elements 6, 8 in the form of metallized and de-metallized areas.
  • the partial metal layers are preferably on the inside, i.e. facing the paper core, since they are better protected there from harmful environmental influences. But they can also be on the outside, especially since they are preferably protected from external influences by camouflage printing. Together, the two partial metal layers create the transparent element 15 in transmitted light.
  • the partially metallized areas of the two films are preferably equipped with an edge area in which a surface density of the metal decreases continuously from the inside to the outside, so that when viewed, no potentially disruptive sharp edge can be seen around the see-through element 15.
  • partially metallized foils instead of the partially metallized foils, corresponding partially metallized foil sections can be used, for example in the form of patches or stripes. fen, also applied or incorporated onto the various conceivable substrates such as polymer, paper or composite materials.
  • the micro-image layer 5 is designed with two channels, so it consists of the channeled first micro-image elements 6 and the channeled second micro-image elements 8.
  • the two types of micro-image elements 6, 8 are arranged nested in the micro-image layer 5.
  • Located in the layer sequence in the viewing direction B in front of the micro-image layer 5 are the micro-imaging elements 14. Together with the micro-image layer 5, they form the see-through element 15.
  • the micro-imaging elements 14 are designed in such a way that a first view 7 and a second view 9 appear depending on the viewing angle ; i.e. the see-through element 15 acts dynamically.
  • a transparent image can be seen in transparency, which has different views 7, 9 when the viewing angle changes in transmission, so that a dynamic effect is achieved.
  • Each view 7, 9 is assigned a specific viewing angle range in which the view 7, 9 can be seen.
  • the viewing angle ranges of the multiple views 7, 9 can also overlap or be the same. However, they preferably differ, especially without an overlap. This increases the barrier to counterfeiting and improves authenticity detection without any aids.
  • the microimage layer 5 is located in the layer sequence of the security element 1 between the first camouflage layer 10 and the second camouflage layer 12. This enables the transparent image to be camouflaged on both sides in reflection by the respective camouflage layer 10, 12, which preferably does not stand out from the surroundings. When viewed in transmission, different first and second views 7, 9 can then be perceived depending on the viewing angle.
  • the camouflage layers 10, 12 can be printed as a raster overprint, with a grid being printed in the same color as the views 7, 9, so that when viewed through, the lighter areas, i.e. the areas without a raster overprint, are better recognized than the raster printed areas.
  • Overprinting with an opaque white color as an ink-accepting layer is also possible in order to camouflage the transparent image on both sides.
  • the microimage layer 5 is colored, for example, by means of reflective paint, e.g. B. metal pigment paint, printed, and then covered and suppressed with an opaque white color as a camouflage layer 10, 12, the views 7, 9, and thus the transparent image when viewing the security element will not be visible in reflection, but in transparency, i.e. at When viewed in transmission, it is perceived as very high in contrast.
  • the opaque white color can be applied in a grid or in the form of a continuous layer. It is also possible to overlay these two variants.
  • the micro-imaging elements 14 can be arranged offset from the micro-image layer 5, as shown in FIG. 3, so that, for example, running effects, pumping or morphing can be generated. It is also possible for the microimaging elements 14 to represent additional views.
  • the security element 1 in further embodiments, for which a paper substrate 16 is provided as the substrate body.
  • the microimage layer 5 with the first microimage element 6 and the second microimage element 8 is embedded in this paper substrate 16.
  • the see-through element 15 is in turn formed by the micro-imaging elements 14 and the micro-image layer 5. It would also be possible that the micro- image layer 5 is located on a front or back side of the paper substrate 16 and the microimaging elements 14 are located on the opposite side.
  • the microimage layer 5 is preceded by a layer of microimaging elements 14 in the viewing direction B.
  • the microimage layer 5 is preceded by a film element 18, which includes the microimaging elements 14.
  • FIG. 6 corresponds to the embodiment of FIG. 4, although conventional watermarks 22, which are generated by a thickness modulation of the paper substrate 16, are now additionally arranged in areas of the paper substrate 16. Conventional watermarks 22 and the transparent element 15 are therefore arranged on the security element 1 according to FIG. 6.
  • the security element 1 in the embodiment of FIG. 7 corresponds to that of the embodiment of FIG. 5, with a blind feature 24 with a covering structure 26 arranged thereon additionally being arranged in areas of the paper substrate 16.
  • a semi-transparent thin-film element with a color changing effect between top and bottom view can be used.
  • the embodiment of the security element 1 according to FIG. 8 essentially corresponds to the embodiment of FIG. 4, with a first latent image 30 and a second latent image 32 additionally being arranged in areas of the paper substrate 16. These are applied using blind embossing or opaque white printing and allow the motif to be changed through shading. 4 to 8, the micro-imaging elements 14 are arranged upstream of the micro-image layer 5 in the viewing direction B, so that a dynamic effect is generated by the see-through element 15 formed by them.
  • camouflage layers 10, 12 can also be provided if the paper substrate 16 is provided as a substrate body.
  • Camouflage layers with an approximately white color are preferred, which at least partially embed the micro imaging elements 14 in the form of microlenses, with the gaps between the lenses, which anyway contribute little to the imaging, filling with the white color, while at least the upper sections of the lenses are exposed to allow the light required for imaging to pass through.
  • the first view 7 represents a subject and the second view 9 does not represent a subject, so that for example the subject of the first view 7 appears in plan view and disappears when tilted because the second view 9 appears without a subject when the viewing angle range from that of the first view 7 to that of the second view 9 changes. It is also possible for the first view 7 to be present as a motif and the second view 9 as a different motif, which results in a flip image being generated between these two motifs when tilted. The same is possible if the first view 7 represents a positive image and the second view 9 represents a negative image, with a positive/negative flip being generated.
  • the lenticular lenses 34 can have different directions in different partial areas 40 to 52.
  • the spherical lenses 38 could be arranged in different grid geometries, e.g. B. hexagonal, square, parallelogram-shaped and a chaotic arrangement is possible.
  • microimaging elements 14 are regularly arranged metallic elements (eg metallic thin-film elements such as plates or strips, or partially applied metallic pigments).
  • FIG. 9 the micro imaging elements 14 are shown as lenticular lenses 34 in an isometric view.
  • 10 shows the micro-imaging elements 14 as prisms 36 in an isometric view 48 and
  • FIG. 11 shows the micro-imaging elements 14 according to FIGS. 9 and 10 in a top view.
  • a vertical alignment of the lenticular lenses 34 or prisms 36 can be seen.
  • the nested views 7, 9 can be visible separately for longer and then switch suddenly, while with prisms a slow fade from one view 7, 9 into the other can be achieved.
  • the lenticular lenses 34 like the prisms 36, can have different directions in different partial areas 40 to 52.
  • Fig. 12 shows the micro-imaging elements 14 as spherical lenses 38 in an isometric view.
  • 13 and 14 show the spherical lenses 38 in a top view, with these being displayed in different grid geometries. are ordered. Hexagonal, square, parallelogram-shaped or even chaotic arrangements can be used as grid geometries. In special variants not explicitly shown, Fresnel lenses can also be used as microimaging elements 14.
  • FIG. 15 and 16 show options for the different arrangements of lenticular lenses 47 or prisms 36 in the security element 1 in a top view.
  • the security element 1 is divided into a first partial area 40, a second partial area 42, a third partial area 44 and a fourth section 45 divided.
  • the orientations of the micro imaging elements 14 differ in the partial areas 40 to 46.
  • Lenticular lenses 34 or prisms 36 come into consideration here as micro imaging elements 14. These have a longitudinal orientation and are aligned horizontally in the areas 40 and 46 and vertically in the areas 42 and 44.
  • the 16 is also divided into a first subregion 48, a second subregion 50 and a third subregion 52, in the first subregion 48 and in the second subregion 50 the microimaging elements 14 (i.e. the lenticular lenses 34 or the prisms 36) are horizontal aligned and in the third portion 52 the micro imaging elements 14 are aligned vertically.
  • the different orientation of the micro-imaging elements in partial areas 40 to 52 increases the complexity of the viewing angle-dependent (dynamic) effect and thus the security against forgery.
  • vertically or horizontally channeled means that the first or second microimage element 7, 9 is each divided into several channels, which are aligned vertically or horizontally and nested within each other.
  • FIG. 17 shows the first view 7, which is shown as a vertically channeled first view 54.
  • 18 shows the second view 9, which is shown as a vertically channeled second view 56.
  • Fig. 19 shows the interaction of the two vertically channeled views 54, 56 to form a vertically nested two-channel image 58.
  • the first view 7 is shown as a horizontally channeled first view 60.
  • Fig. 21 shows the second view 9 as a horizontally channeled second view 62 and Fig. 21 shows the horizontally nested two-channel image 64 composed of the two horizontally channeled views 60, 62.

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Abstract

L'invention concerne un élément de sécurité (1) pour un document de valeur, lequel élément de sécurité comprend un corps de substrat (2, 16) ayant une face avant (3) et une face arrière (4), et un élément transparent (15) qui, lorsque l'on regarde à travers, présente une image transparente à un observateur. L'élément transparent (15) comprend des éléments de micro-imagerie (14), ainsi que des premiers éléments de micro-image (6) et des seconds éléments de micro-image (8) qui sont agencés de manière alternée dans une couche de micro-image (5). La couche de micro-image (5) est appliquée sur la face avant (3) ou sur la face arrière (4) du corps de substrat (2, 16) ou est incorporée dans celui-ci. Les éléments de micro-imagerie (14) imagent les éléments de micro-image (6, 8). Les premiers éléments de micro-image (6), conjointement avec les éléments de micro-imagerie (14), fournissent une première vue (7) de l'image transparente, laquelle première vue peut être vue à partir d'une première plage d'observation angulaire, et les seconds éléments de micro-image (8), conjointement avec les éléments de micro-imagerie (14), fournissent une seconde vue (9) de l'image transparente, laquelle seconde vue peut être vue à partir d'une seconde plage d'observation angulaire. Les éléments de micro-image (6, 8) sont agencés d'une manière telle que les vues (7, 9) sont entrelacées par rapport à la couche de micro-image (5), et la première vue (7) diffère de la seconde vue (9) en termes de translucidité.
PCT/EP2023/025105 2022-03-07 2023-03-07 Élément de sécurité pour un document de valeur, document de valeur et procédé de production d'un élément de sécurité WO2023169714A1 (fr)

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DE102022000785.1 2022-03-07
DE102022000785.1A DE102022000785A1 (de) 2022-03-07 2022-03-07 Sicherheitselement für ein Wertdokument, Wertdokument und Verfahren zur Herstellung eines Sicherheitselements

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WO2023169714A1 true WO2023169714A1 (fr) 2023-09-14

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238043A2 (fr) * 1986-03-18 1987-09-23 GAO Gesellschaft für Automation und Organisation mbH Document de sécurité à fil de sécurité incorporé
WO2011051668A1 (fr) * 2009-10-30 2011-05-05 De La Rue International Limited Dispositif de sécurité
GB2547045A (en) * 2016-02-08 2017-08-09 De La Rue Int Ltd Improvements in security devices
EP3268235B1 (fr) 2015-03-12 2019-02-27 Giesecke+Devrient Currency Technology GmbH Procédé servant à fabriquer un substrat de document de valeur, substrat de document de valeur ainsi obtenu et document de valeur
WO2019076805A1 (fr) * 2017-10-20 2019-04-25 Koenig & Bauer Ag Élément de sécurité ou document de sécurité
WO2020015847A1 (fr) * 2018-07-19 2020-01-23 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité doté d'une image lenticulaire

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007005884B4 (de) 2007-02-07 2022-02-03 Leonhard Kurz Stiftung & Co. Kg Sicherheitsdokument
AU2012100985B4 (en) 2012-06-29 2012-11-15 Ccl Secure Pty Ltd Optically variable colour image
EP3795367A1 (fr) 2015-07-13 2021-03-24 Wavefront Technology, Inc. Produits optiques
GB2553104B (en) 2016-08-22 2019-12-11 De La Rue Int Ltd Image arrays for optical devices and methods of manufacture therof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238043A2 (fr) * 1986-03-18 1987-09-23 GAO Gesellschaft für Automation und Organisation mbH Document de sécurité à fil de sécurité incorporé
WO2011051668A1 (fr) * 2009-10-30 2011-05-05 De La Rue International Limited Dispositif de sécurité
EP3268235B1 (fr) 2015-03-12 2019-02-27 Giesecke+Devrient Currency Technology GmbH Procédé servant à fabriquer un substrat de document de valeur, substrat de document de valeur ainsi obtenu et document de valeur
GB2547045A (en) * 2016-02-08 2017-08-09 De La Rue Int Ltd Improvements in security devices
WO2019076805A1 (fr) * 2017-10-20 2019-04-25 Koenig & Bauer Ag Élément de sécurité ou document de sécurité
WO2020015847A1 (fr) * 2018-07-19 2020-01-23 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité doté d'une image lenticulaire

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