WO2016034274A1 - Élément de sécurité optiquement variable - Google Patents

Élément de sécurité optiquement variable Download PDF

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Publication number
WO2016034274A1
WO2016034274A1 PCT/EP2015/001727 EP2015001727W WO2016034274A1 WO 2016034274 A1 WO2016034274 A1 WO 2016034274A1 EP 2015001727 W EP2015001727 W EP 2015001727W WO 2016034274 A1 WO2016034274 A1 WO 2016034274A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
microstructure
thin
optically variable
security element
Prior art date
Application number
PCT/EP2015/001727
Other languages
German (de)
English (en)
Inventor
Patrick ENGELMANN
Winfried HOFFMÜLLER
Theodor Burchard
Ralf Liebler
Andreas Rauch
Christian Fuhse
Original Assignee
Giesecke & Devrient 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
Publication date
Application filed by Giesecke & Devrient Gmbh filed Critical Giesecke & Devrient Gmbh
Priority to EP15775377.3A priority Critical patent/EP3188916B1/fr
Priority to CN201580043842.8A priority patent/CN106573488B/zh
Publication of WO2016034274A1 publication Critical patent/WO2016034274A1/fr

Links

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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/355—Security threads

Definitions

  • the invention relates to an optically variable security element for securing valuables, having a feature area that exhibits at least two different optically variable effects.
  • the invention also relates to a method for producing such a security element and a correspondingly equipped data carrier.
  • Data carriers such as valuables or identity documents, or other valuables, such as branded articles, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carriers and at the same time serve as protection against unauthorized reproduction.
  • Security elements with viewing-angle-dependent effects play a special role in the authentication of authenticity since they can not be reproduced even with the most modern copiers.
  • the security elements are thereby equipped with optically variable elements that give the viewer a different image impression at different viewing angles and, for example, show a different color or brightness impression and / or another graphic motif depending on the viewing angle.
  • the object of the invention is to specify a security element of the type mentioned in the introduction, in which the different optically variable effects are arranged in register with one another.
  • the feature region is provided in a first subregion with a microstructure having a first optically variable effect, in a second subregion of the feature region no microstructure is present, the feature region with a thin film element covering the microstructure is provided with interference layer structure, which in the second subregion as a second optically variable effect a
  • the interference layer structure of the thin-film element in the first and second subregions comprises a printed dielectric layer, by which the color shift effect is suppressed in the first partial area having the microstructure to the naked eye, so that in the first partial area only the first optically variable effect of the microstructure and in the second partial area as a second optically variable effect the color shift effect of the thin film element is present.
  • the suppression of the color shift effect in the first subregion is currently attributable to the fact that the dielectric layer material runs to some extent during printing and the surface of the dielectric thus does not or at least does not extend to the elevations and depressions of the microstructure can completely follow. This results in locally different dielectric layer thicknesses. Since the local thickness of the dielectric determines the colors at which constructive and destructive interference occurs, and thus also determines the color of the reflected light, the color-shifting layer system reflects different colors depending on the local thickness of the dielectric material. With a larger surface area, the different colors produce a gray or silvery hue, depending on the brightness.
  • the first section advantageously shows a non-colored, metallic, typically silvery appearance.
  • the reflective layer of the thin-film element can be formed from copper, which produces a reddish metallic appearance in the first subregion.
  • the printed dielectric layer has a locally irregular layer thickness in the first partial region having the microstructure, preferably with a thickness variation of 10% or more, particularly preferably 20% or more, 40% or more and in particular 60% or more ,
  • the thickness variation is related to the largest layer thickness, so that, for example, a dielectric layer whose thickness varies between 240 nm and 300 nm has a thickness variation of 20%.
  • the interference layer structure of the thin-film element comprises a reflection layer, an absorber layer and a dielectric spacer layer arranged between the reflection layer and the absorber layer.
  • the interference layer structure may advantageously also comprise two absorber layers and a dielectric spacer layer arranged between the two absorber layers.
  • the dielectric spacer layer need not only be formed by the printed dielectric layer, but may be formed also comprise two or more sub-layers, in particular a vapor-deposited dielectric layer and a printed dielectric layer.
  • the first subarea preferably has a microscopic rainbow color shift effect that can only be detected by magnification.
  • the microscopic rainbow color shift effect is preferably composed of a plurality of microscopic color dots of different colors, the largest dimension of the microscopic color dots between 1 ⁇ and 80 ⁇ , preferably between 1 ⁇ and 20 ⁇ , more preferably between 2 ⁇ and 5 ⁇ .
  • This microscopic rainbow color-shift effect can be used as a higher-level mark of authenticity, which can be tested only with special tools, such as a strong magnifying glass or a microscope.
  • the first subregion has in its interior a recessed region in which the dielectric spacer layer is recessed in the interference layer structure of the thin-film element.
  • the recessed area advantageously has a largest dimension between 10 .mu.-1 and 200 .mu.m, preferably between 20 .mu.m and 150.mu.m.
  • a recessed area can provide further hidden authenticity feature, since the recessed area and the rest of the first area have the same appearance when viewed with the naked eye, but the enlarged microscopic rainbow color-shift effect in the recessed area can be detected by magnified viewing. Even larger recesses with largest dimensions of several millimeters are conceivable.
  • Such large recessed areas can not be detected with a conventional microscope as a whole, the authenticity can be in the peripheral areas of the Recess areas occur where the transitions from colorless areas and "rainbow" areas are visible in the microscope.
  • the feature area of the security element has, in addition to the first and second subarea, a third and fourth subarea, wherein the feature area in the third subarea is provided with a microstructure having an optically variable effect the fourth subregion of the feature region has no microstructure, and the interference layer structure of the thin-film element in the third and fourth subregions contains a vapor-deposited dielectric layer but no printed dielectric layer, so that the thin-film element generates a color-tilting effect in the third and fourth subregions in the third subregion superimposed on the optically variable effect of the microstructure.
  • the interference layer structure of the thin-film element advantageously contains the vapor-deposited dielectric layer in all four subregions, so that it forms a dielectric spacer layer of the thin-film element in the first and second subarea together with the printed dielectric layer.
  • the microstructure of the third subregion is identical to the microstructure of the first subregion and generates the same optically variable effect.
  • the first and third sub-areas still show different appearances, since the thin-film element generates a color-shift effect in the third sub-area, while the color-shift effect in the first sub-area is suppressed.
  • the first subregion therefore only shows the optically variable effect produced by the microstructure, while this optically variable effect in the third subregion is combined with the color shift effect of the thin film element.
  • the microstructure of the first subarea is advantageously formed by a diffractive relief structure, such as a hologram structure, by a micromirror structure, by a microlens structure or by a microcavity structure. If the feature area contains the above-mentioned third subarea, the microstructure of the third subarea may alternatively or additionally be formed by one of the structures mentioned. As mentioned, the microstructures of the first and third subregions are preferably identical.
  • the invention also includes a data carrier with a security element of the type described.
  • the data carrier may in particular be a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon , a check, a high-quality entrance ticket, as well as an identification card, such as a credit card, a bank card, a cash card, an authorization card, an identity card or a pass personalization page.
  • a banknote in particular a paper banknote, a polymer banknote or a film composite banknote, a share, a bond, a certificate, a coupon , a check, a high-quality entrance ticket
  • an identification card such as a credit card, a bank card, a cash card, an authorization card, an identity card or a pass personalization page.
  • the invention further includes a method for producing an optically variable security element of the type described above, in which a carrier substrate is provided in a first subregion of the feature region with a microstructure having a first optically variable effect, no microstructure provided in a second subregion of the feature region is, the feature area with a microstructure covering thin-film element is provided with interference layer structure, which generates a color shift effect in the second portion as the second optically variable effect, and the interference layer structure of the thin-film element in the first and second portion is generated with a printed as a liquid paint dielectric layer in that the color shift effect in which the microstructure having the first partial area is suppressed to the naked eye, so that in the first partial area only the first optically variable effect of the microstructure and in the second subregion, the color shift effect of the thin-film element is present as the second optically variable effect.
  • a reflection layer or absorber layer is vapor-deposited in the first and second subarea for the production of the thin-film element. If a dielectric layer is vapor-deposited, then a dielectric layer in the form of a dielectric layer is applied imprinted liquid paint, and finally an absorber layer is evaporated.
  • FIG. 1 shows a schematic representation of a banknote with an optically variable security element according to the invention in the form of a wide security strip
  • FIG. 2 shows the security element of FIG. 1 schematically in cross section
  • FIG. 3 is a plan view of a detail of a development of the security element of FIG. 1, in which the dielectric layer is recessed in a small recessed area in the interior of the subregion, and
  • FIG. 4 schematically shows a more complex embodiment of the invention with four partial regions with four different optically variable effects, wherein (a) shows a plan view and (b) shows a cross-section along the line B-B of (a).
  • FIG. 1 shows a schematic representation of a banknote 10 with an optically variable security element 12 according to the invention Shape of a wide safety strip.
  • the invention is not limited to security strips and banknotes but can be used with all types of security elements, for example labels on goods and packaging or in the security of documents, identity cards, passports, credit cards, health cards and like.
  • security threads or transfer elements may be considered in addition to security strips.
  • the optically variable security element 12 contains a feature region 14, which consists of two subregions 16, 18, which are distinguished in the figure with different very af benefits.
  • the first portion 16 is formed by two silvery squares 20 and the silvery shiny number sequence 22. Next, the first portion 16 shows a first optically variable effect in the form of a running effect, in which when tilting the security element 12, a bright horizontal bar seems to move up or down.
  • the second subregion 18 is formed by the remaining parts of the feature region 14 and shows a second optically variable effect in the form of a color shift effect, for example with a color change from green when viewed perpendicularly to blue when viewed obliquely.
  • a color shift effect for example with a color change from green when viewed perpendicularly to blue when viewed obliquely.
  • no color shift effect is recognizable to the observer, but this area appears to be non-colored with a metallic, in particular silvery, appearance.
  • the peculiarity of the described security element 12 consists in particular in the fact that the first and second subareas 16, 18 with their different visual appearances are perfectly matched to one another are. If, in conventional designs, the first partial region 16 with its optically variable running effect as a contrast to the color-shifting environment 18 has a silvery appearance, then the thin-film structure which gives the second partial region 18 its color-shift effect must be recessed in the first partial region 16, since otherwise also a color shift effect is visible. For this purpose, for example, a washing ink must be printed on the first sub-area, with the aid of which the subsequently applied thin-film structure in the first sub-area can be removed again.
  • wash ink is applied in a separate operation to an already suitably structured first portion 16, due to production inevitable Passerschwankept between the structuring and the recess in the thin film structure, so that the optically variable running effect and the color shift effect can not be arranged in register to each other.
  • the security element 12 of FIG. 1 has the structure shown schematically in FIG. 2 in cross-section.
  • a UV-curable embossing lacquer layer 32 is applied to a carrier film 30, for example a PET film, and provided with an embossed microstructure 34 in the first subregion 16, which generates the running effect described in connection with FIG.
  • the feature area 14 of the security element occupies the entire area of the carrier film 30.
  • the regions of the feature region 14 which are located outside the first subregion 16 provided with the microstructures 34 form the second subregion 18 in which no microstructures are present.
  • an interference layer structure thin-film element 40 comprising a reflective layer 42, a dielectric spacer layer 44 and an absorber layer 46 was applied to the entire feature area 14.
  • the dielectric spacer layer of such thin film elements is formed by vapor deposition, whereby a dielectric layer of uniform thickness is formed regardless of the local surface texture of the reflective layer 42.
  • the dielectric spacer layer 44 of the invention is printed as a liquid paint and subsequently cured. Solvent paints based on nitrocellulose, for example, which have good flow behavior, are very suitable.
  • the paint in liquid form By applying the paint in liquid form, the latter runs in the first subregion 16 with the microstructures 34 to a certain extent between the individual structural elements 36, thereby completely or partially leveling the microstructure 34.
  • the dielectric layer 44 therefore does not have a uniform layer thickness in the first subregion 16, so that no large-area color-shift effect visible to the naked eye can form there. On the contrary, the color-shift effect in the partial area 16 is effectively suppressed and appears substantially non-colored with the silvery appearance of the reflection layer 42.
  • the dielectric layer 44 is printed there with a uniform layer thickness on the flat substrate and the thin-film element 40 therefore produces the desired color-shift effect in a manner known per se. Since the dielectric layer 44 is printed over the entire feature area 14, including the first and second subareas 16, 18, and the suppression of the color shift effect is precisely in the area of the microstructures 34 of the first subarea 16, a perfect registration between the optical elements automatically results without additional measures variable effects of the two partial areas 16, 18, namely between the optically variable running effect of the partial area 16 and the color shift effect of the partial area 18.
  • the first partial area 16 as explained, by the non-uniform
  • Layer thickness of the dielectric layer 44 shows no apparent to the viewer with the naked eye color shift effect
  • the layer thickness of the dielectric layer 44 on a microscopic length scale in the order of the microstructure elements 36 sections may well be substantially constant.
  • a microscopic rainbow color-shift effect can then be observed in which the interference colors produced change in rapid succession.
  • the multiplicity of microscopic color dots 56 overlap to the above-mentioned non-colored overall impression.
  • This microscopic rainbow color-shift effect can be used as a higher-level mark of authenticity, which can be tested only with special tools, such as a strong magnifying glass or a microscope.
  • FIG. 3 shows a development of the security element 12 in a plan view onto a detail cut-out 50, in which the dielectric layer 44 is arranged in a small recess. rich 52 is recessed inside the portion 16.
  • the recess area is advantageously designed in the form of characters, patterns or an encoding, whereby FIG. 3 shows by way of example the number sequence "10" which indicates the denomination of the banknote 10.
  • the recess region 52 is advantageously arranged in the interior of the partial region 16, is also very small with a dimension of typically 20 ⁇ to 150 ⁇ . A registration of the recessed area 52 to other elements of the security element is therefore not important.
  • the recessed region 52 does not show a color shift effect because of the dielectric layer 44 missing there, but essentially only the silvery appearance of the reflection layer 42.
  • the presence of the recessed region 52 is therefore not visible to the naked eye. Only when looking at the section 50 with a microscope differences are clear.
  • the non-recessed areas 54 of the portion 16 exhibit the above-described microscopic rainbow color-shift effect composed of a plurality of microscopic color dots 56 of different color.
  • the dimension of the microscopic color dots 56 is usually between 1 ⁇ and 10 ⁇ ⁇ , but they can in principle be larger, as long as it is below the resolution of the human eye. From this microscopically color-shifting background, the recess area 52 clearly stands out due to the absence of any color effects as a negative representation in the form of the number sequence "10".
  • FIG. 4 schematically shows a more complex embodiment of the invention with a feature area 62 consisting of four subareas 64, 66, 68, 70 with four different optically variable effects. It shows 4 (a) is a plan view of the optically variable security element 60 and FIG. 4 (b) is a cross section of the security element 60 taken along the line BB of FIG. 4 (a).
  • a UV-curable embossing lacquer layer 32 is applied to a carrier foil 30 and provided in the first subarea 64 and in the third subarea 68 with an embossed microstructure 34 which generates, for example, the running effect described with reference to FIG.
  • the second subregion 66 and fourth subregion 70 no microstructures are present.
  • the entire feature area 62 is provided with a thin-film element 80 with an interference layer structure, which is formed by a reflection layer 82 applied in all four subregions 64, 66, 68, 70, a dielectric layer 84 vapor-deposited in all four subregions, one only in the first and third Partial area 64, 66 printed dielectric layer 86 and an applied again in all four sections 64, 66, 68, 70 absorber layer 88 is formed.
  • the embodiment of FIG. 4 thus combines the vapor deposition of a dielectric layer 84 with the printing of a dielectric layer 86 as a liquid paint.
  • each subarea Since there is a layer sequence of reflection layer, dielectric spacer layer and absorber layer in each subarea, each subarea is provided with a color-shifting thin-film element, even if the layer thickness of the spacer layer is greater in the first and second subareas 64, 66 than in the third and fourth subareas 68, 70.
  • a thin-layer element with reflection layer 82, vapor-deposited dielectric layer 84, printed dielectric layer 86 and absorber layer 88 is present on a flat substrate, which generates a second, longer-wavelength color-shift effect because of the greater total thickness of the spacer layer, in this case from red to green.
  • a thin-film element with reflection layer 82, vapor-deposited dielectric layer 84 and absorber layer 88 is present on the microstructures 34. Since the deposited dielectric layer 84 has a uniform thickness regardless of the local surface texture of the underlying reflective layer 82, in the third partial region 68 the running effect of the microstructures is superimposed on the first color shift effect (green to blue).
  • a thin-film element with reflection layer 82, vapor-deposited dielectric layer 84, printed dielectric layer 86 and absorber layer 88 is present on the microstructures 34.
  • the varnish 86 printed in liquid form, as already described above runs to some extent between the individual structural elements 36, thereby leveling the microstructures 34 completely or partially.
  • the dielectric spacer layer consisting of the layers 84, 86 therefore does not have a uniform thickness, so that no large-area color-shift effect visible to the naked eye can form in the first partial region 64. There, therefore, only the running effect of the microstructures 34 without superimposed color shift effect is visible. Also in the embodiment of Fig. 4, the optically variable effects are perfectly matched with each other.
  • first and second sub-areas 64, 66 this registration results, as explained above, from the fact that the suppression of the color-shift effect occurs precisely in the area of the microstructures 34 of the first sub-area 64.
  • the boundary between the third and the fourth subarea 68, 70 is automatically formed at the edge of the microstructures 34 and therefore also has no register fluctuations.
  • the boundary between the first and third subarea or between the second and fourth subarea is defined by the edge of the printed dielectric layer 86, so that no register fluctuations occur here as well.

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  • Credit Cards Or The Like (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

L'invention concerne un élément de sécurité optiquement variable (12) permettant de sécuriser des objets de valeur. Ledit élément comprend une zone de caractéristiques (14) qui présente au moins deux effets optiquement variables différents. Selon l'invention, la zone de caractéristiques (14) est pourvue dans une première partie (16) d'une microstructure (34) qui présente un premier effet optiquement variable, aucune microstructure n'est présente dans une deuxième partie (18) de la zone de caractéristiques (14), la zone de caractéristiques (14) est pourvue d'un élément à couche mince (40) recouvrant la microstructure (34) et présentant une structure de couches d'interférence, laquelle produit dans la deuxième partie (18) un effet de changement de couleur en tant que deuxième effet optiquement variable, et la structure de couches d'interférence de l'élément à couche mince (40) présente dans la première et la deuxième partie (16, 18) une couche diélectrique (44) imprimée, au moyen de laquelle l'effet de changement de couleur dans la première partie (16) comprenant la microstructure (34) n'est plus visible à l'œil nu, de sorte que dans la première partie (16), seul le premier effet optiquement variable de la microstructure (34) est présent, et dans la deuxième partie (18), l'effet de changement de couleur de l'élément à couche mince (40) est présent en tant que deuxième effet optiquement variable.
PCT/EP2015/001727 2014-09-03 2015-08-24 Élément de sécurité optiquement variable WO2016034274A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15775377.3A EP3188916B1 (fr) 2014-09-03 2015-08-24 Element de securite a effet optique variable
CN201580043842.8A CN106573488B (zh) 2014-09-03 2015-08-24 视觉可变式防伪元件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014013049.5 2014-09-03
DE102014013049.5A DE102014013049A1 (de) 2014-09-03 2014-09-03 Optisch variables Sicherheitselement

Publications (1)

Publication Number Publication Date
WO2016034274A1 true WO2016034274A1 (fr) 2016-03-10

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PCT/EP2015/001727 WO2016034274A1 (fr) 2014-09-03 2015-08-24 Élément de sécurité optiquement variable

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EP (1) EP3188916B1 (fr)
CN (1) CN106573488B (fr)
DE (1) DE102014013049A1 (fr)
WO (1) WO2016034274A1 (fr)

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GB2555491A (en) * 2016-11-01 2018-05-02 De La Rue Int Ltd Security devices and methods of manufacture thereof
CN109983408A (zh) * 2016-11-24 2019-07-05 大日本印刷株式会社 光调制元件和信息记录介质
CN111095128A (zh) * 2017-09-08 2020-05-01 大日本印刷株式会社 光调制元件和信息记录介质
EP3865311A1 (fr) * 2020-02-14 2021-08-18 Hueck Folien Gesellschaft m.b.H. Procédé de fabrication d'un élément de sécurité
EP3793839B1 (fr) 2018-05-18 2022-12-07 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à microréflecteurs

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DE102016007649A1 (de) * 2016-06-22 2017-12-28 Giesecke+Devrient Currency Technology Gmbh Optisch variables Sicherheitselement
DE102018001379A1 (de) * 2018-02-21 2019-08-22 Giesecke+Devrient Currency Technology Gmbh Transferträger
CN108773229B (zh) * 2018-06-12 2019-11-15 王海宇 防伪装置及制造方法和安全票证
CN111746171B (zh) * 2019-03-29 2021-06-15 中钞特种防伪科技有限公司 光学防伪元件及其制作方法
DE102019005707A1 (de) * 2019-08-14 2021-02-18 Giesecke+Devrient Currency Technology Gmbh Optisch variables Sicherheitselement

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GB2555491A (en) * 2016-11-01 2018-05-02 De La Rue Int Ltd Security devices and methods of manufacture thereof
GB2555491B (en) * 2016-11-01 2019-03-27 De La Rue Int Ltd Security devices and methods of manufacture thereof
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US10723164B2 (en) 2016-11-01 2020-07-28 De La Rue International Limited Security devices and methods of manufacture thereof
CN109983408A (zh) * 2016-11-24 2019-07-05 大日本印刷株式会社 光调制元件和信息记录介质
CN113835322B (zh) * 2016-11-24 2023-12-29 大日本印刷株式会社 光调制元件和信息记录介质
US11703798B2 (en) 2016-11-24 2023-07-18 Dai Nippon Printing Co., Ltd. Light modulation element and information recording medium
CN109983408B (zh) * 2016-11-24 2021-10-22 大日本印刷株式会社 光调制元件和信息记录介质
CN113835322A (zh) * 2016-11-24 2021-12-24 大日本印刷株式会社 光调制元件和信息记录介质
CN111095128B (zh) * 2017-09-08 2022-02-25 大日本印刷株式会社 光调制元件和信息记录介质
CN111095128A (zh) * 2017-09-08 2020-05-01 大日本印刷株式会社 光调制元件和信息记录介质
EP3793839B1 (fr) 2018-05-18 2022-12-07 Giesecke+Devrient Currency Technology GmbH Élément de sécurité à microréflecteurs
EP3865311A1 (fr) * 2020-02-14 2021-08-18 Hueck Folien Gesellschaft m.b.H. Procédé de fabrication d'un élément de sécurité

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CN106573488A (zh) 2017-04-19
DE102014013049A1 (de) 2016-03-03
EP3188916B1 (fr) 2018-08-01
EP3188916A1 (fr) 2017-07-12

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