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WO2011082760A1 - Élément de sécurité et son procédé de fabrication - Google Patents

Élément de sécurité et son procédé de fabrication Download PDF

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Publication number
WO2011082760A1
WO2011082760A1 PCT/EP2010/007544 EP2010007544W WO2011082760A1 WO 2011082760 A1 WO2011082760 A1 WO 2011082760A1 EP 2010007544 W EP2010007544 W EP 2010007544W WO 2011082760 A1 WO2011082760 A1 WO 2011082760A1
Authority
WO
WIPO (PCT)
Prior art keywords
motif
security element
microimage elements
elements
layer
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2010/007544
Other languages
German (de)
English (en)
Inventor
Peter Schiffmann
Marius Dichtl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and 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 and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Priority to EP10795235.0A priority Critical patent/EP2512818B1/fr
Publication of WO2011082760A1 publication Critical patent/WO2011082760A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B42D25/342—Moiré effects
    • 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • B42D2035/20—
    • B42D2035/44—

Definitions

  • the invention relates to a security element for security papers, documents of value or the like, having a carrier, which has an upper side, a plurality of microimaging elements arranged on the upper side of the carrier, at least one motif layer arranged below the microimage elements, which together with the microimage elements. Menten forms a Moire- enlargement arrangement, which images a first motif in front of the top, wherein the position of the first motif depends on the viewing direction, and applied to the microimage elements structure, which viewed from the top of a second motif in a spatially predetermined position to the first Motif shows.
  • Items to be protected are often provided with a security element that allows verification of the authenticity of the item and at the same time serves as protection against unauthorized reproduction.
  • Items to be protected include, for example, security papers, identity and value documents (such as banknotes, chip cards, passports, identification cards, identity cards, stocks, bonds, certificates, vouchers, checks, tickets, credit cards, health cards, etc.) as well as product security elements such as security items. Labels, seals, packaging.
  • the publication US Pat. No. 5,712,731 A also discloses the use of a moire magnification arrangement for a security element.
  • the security device described therein has a regular arrangement of substantially identical printed microimages with a size of up to 250 ⁇ and a regular two-dimensional array of substantially identical spherical microlenses.
  • the microlens arrangement has substantially the same pitch as the microimage arrangement. If the micro-image arrangement is viewed by the microlens array, then in the areas in which the two arrangements are substantially in register, one or more enlarged versions of the microimages are generated for the viewer.
  • moire magnification refers to a phenomenon that occurs when viewing a raster of identical image objects through a lenticular of approximately the same pitch. As with any pair of similar grids, this results in a moire pattern that is in this Fall as an enlarged and possibly rotated image of the repeated elements of the image grid appears.
  • a moiré magnification arrangement has the property / Schmin- that f ormation with the viewing angle changes.
  • US 2005/0180020 A1 discloses an orthoparallactic movement of the generated image. If one tilts the security element, the depicted motif moves perpendicular to the tilt axis, which contradicts the usual movement behavior in three-dimensional space and therefore has a high attention and recognition value. Moire magnification arrangements are therefore widely used in security elements.
  • WO 2007/133613 A2 proposes to combine a moire magnification arrangement, which generates a viewing direction-dependent image, with static print information.
  • the image information generated by the moire magnification arrangement is supplemented by statically printed images.
  • the document specifies to print the image information on the lens surface of the Moire magnification arrangement, or to provide this image information in the case of a transparent security element on the underside of the Mo Vergr Thompson Vergrieri magnification arrangement, ie under the microstructure elements.
  • the static, ie printed images can supplement or even delete the image information generated by the moire magnification arrangement.
  • the invention has for its object to provide a security element that gives increased moire magnification arrangements increased copy and reproduction protection.
  • the invention provides a security element for security papers, documents of value or the like, with a carrier having a top, a plurality of surface arranged on the top of the carrier micro imaging elements and at least one arranged under the microimage elements motif layer, which together with the microimage elements a Moire magnification arrangement, which images a first motif in front of the top, wherein the position of the first motif depends on the viewing angle, and a structure arranged above the microimage elements which, viewed from the top, shows a second motif in a spatially predetermined position relative to the first motif, wherein the first motif is designed as a raster image having a first rasterization, and the structure arranged above the microimage elements is likewise designed as a raster image which has a second rastering, wherein the two rasters are attached to one another fits are.
  • the term "above” is to be understood as the usual convention in the viewing direction
  • the raster structure is located in the viewing direction, ie before the microimage elements This can be realized particularly simply by applying the raster structure to the microimage elements, optionally with the interposition of further Layers or structures.
  • micro in the sense of this description means that the corresponding elements etc. are not resolvable with the unaided eye.
  • the combination of a moiré magnification arrangement according to the invention and the structure arranged above the microimage elements makes it possible to combine the motifs generated thereby at the level of the Both rasters, so a size level that is below the motif size.
  • the prior art combines motifs and can thus achieve, for example, masking by pushing one motif over the other during slow tilting of the security element.
  • mutual matching of the rasters and thereby a combination of the two rastered motifs is now possible in such a way that the raster elements which form the respective motif overlap individually.
  • the security element according to the invention can thus work in the sense of a shading image in which, for example, the first motif suddenly disappears or appears due to tilting of the security element.
  • the thickness of the security element is much lower when the structure providing the screened second motif is applied to the microimage elements.
  • a particularly simple realization of the invention is achieved by printing the structure directly onto the microimage elements.
  • the security element then only has a thickness between 80 ⁇ ⁇ and 100 ⁇ .
  • the security element allows, as already mentioned, a viewing direction-dependent obscuring the first subject.
  • the moire magnification arrangement is formed such that the second motif obscures the first motif in at least one viewing direction.
  • the adaptation of the second rasterization of the structure arranged on the microimage elements to the raster of the (moiré) motif of the moiré magnification arrangement can be calculated particularly simply by the magnification factor with which microstructures of the motif layer arranged below the microimage elements are enlarged , From this magnification factor, the grid of the first (Moire-) results Motive, which is generated by the Moire magnification arrangement, and thus the required vote for the associated second screening of the arranged on the microimage elements structure.
  • the security element according to the invention can not only be used for shading the first motif.
  • the information of the first and the second motif can be combined to form a total information, as otherwise already known in the prior art, for example in the form of a currency unit and a denomination of a banknote.
  • a security element in which a) a motif layer and a plurality of microimage elements are formed on a support, wherein the microimage elements and the motif layer together form a moiré magnification arrangement, which forms a first motif B) over the microimage elements, a structure is arranged, which when viewed from the top shows a second motif in a spatially predetermined position to the first motif, the first motif designed as a raster image is, which has a first screening, and d) the structure arranged in b) is also carried out as a raster image having a second screening, wherein the two screens are adapted to each other.
  • the security element can be designed, in particular, as a security thread, tear-open thread, security strip, security strip, patch or label for application to a security paper, value document or the like.
  • the security element can span transparent areas or recesses or recesses or windows.
  • security paper is understood here to mean, in particular, the precursor of a value document which is not yet ready for circulation and which, in addition to the security element according to the invention, may for example have further authenticity features (such as, for example, luminescent substances contained in the volume).
  • Value documents are here understood, on the one hand, documents produced from security papers. On the other hand, value documents can also be other objects and documents that can be provided with the security feature according to the invention, so that the value documents have non-copyable authenticity features. In this way, an authenticity check is possible and at the same time unwanted or unauthorized copies are prevented.
  • the document of value may be a banknote and the security paper may be banknote paper.
  • Fig. 1 is a sectional view through a security element
  • FIGS. 2-4 are exemplary plan views of motifs generated by the security element of FIG.
  • Fig. 1 shows a security element 1, which can be integrated, for example, within a banknote.
  • the security element 1 can be part of a security thread of the banknote, which is woven in a known manner into the paper of the banknote for the skilled person that it is partially visible on the front and partly on the back of the banknote.
  • a carrier 2 which can be realized for example by a plastic film. This plastic film is transparent.
  • the term "transparent” or “transparency” is understood to mean visual or visual transparency.
  • the security element can also be full-surface or partially colored or colored by an overprint.
  • the carrier 2 has on its (top in the illustration of FIG. 1) top micro imaging elements 3, which are arranged in a specific pattern.
  • a motif layer 4 is applied to the support 2, which has a plurality of microelements 5, which are also arranged in a pattern.
  • the pattern of the micro-imaging elements 3 is defined by an array of microlenses 6.
  • the microimage elements 3 realize, together with the motif layer 4, a moiré magnification arrangement which identifies the image information realized by the microelements 5 as the first motif (hereinafter referred to as the moiré motif).
  • the moire motif is designed as a raster image which encodes the image information in a specific screening, for example as a bar or dot matrix.
  • the microlenses 6 may be formed, for example, on the surface of the carrier 2, which may be, for example, a transparent plastic film, in particular an approximately 20 ⁇ m thick polyethylene terephthalate (PET) film, forming the pattern in the form of a two-dimensional Bravais grating having a predetermined symmetry.
  • the term "pattern" is used here for a clear distinction from the screening of the moiré motif-of course, the pattern in which the microlenses 6 are arranged could of course also be called a screen.
  • a hexagonal lattice symmetry can be used for the pattern in which the microlenses 6 are arranged.
  • the distance of adjacent microlenses 6 is preferably chosen as small as possible in order to achieve the highest possible area coverage, since this is advantageous for a high-contrast representation of the moire motif.
  • the spherically or aspherically configured microlenses 6 preferably have a diameter between 5 ⁇ m and 50 ⁇ m and in particular a diameter between 10 ⁇ m and 35 ⁇ m. They are therefore invisible to the naked eye.
  • the microelements 5 on the underside of the carrier 2 form the motif layer 4, wherein the pattern of the microelements 5 forms the same grid as the microlenses 6, for example again a two-dimensional Bravais grid with a predetermined symmetry.
  • the pattern of the microelements 5 differs slightly in its symmetry and / or size of the grating parameters from the pattern of the microlenses 6. Depending on the nature and size of the difference, a more or less magnified image arises when viewed from the front side the microelements 5.
  • Grid period and diameter of the pattern of the microlenses 6 and the microelements 5 are of the same order of magnitude, ie preferably in the range already mentioned, so that even the microelements 5 themselves can not be resolved normally with unarmed eyes or even not be seen.
  • the focal length of the microlenses 6 and the optical thickness of the carrier 2 are matched to one another such that the microelements 5 which form the motif layer 4 are located approximately at a distance from the lens focal length of the microlenses 6.
  • the carrier 2 thus serves as an optical spacer layer which ensures a desired constant distance of the microlenses 6 from the microelements 5 of the motif layer 4.
  • a printing layer 7 is applied as a motivating structure, which generates a second motif (hereinafter referred to as print motif). This is also designed as a raster image.
  • the print motif is matched in its grid to that of the Moire motif.
  • the layer 7 can be printed on. Also, a film can be applied, which contains the layer 7.
  • the film may be a cold or a heat-sealing film.
  • a layer may first be applied and then structured, e.g. B. by laser radiation and / or ablation. This allows an individual simplification or personalization of the security element.
  • FIG. 2 shows the top view of the respective motifs 8, 10 and their screens.
  • Fig. 2 shows the top view of the grid 9 of the printing motif 8 of the printing layer 7.
  • this structure is to be understood only as an example; it serves to illustrate the operation of the invention.
  • the image of the Moire magnification arrangement in particular the imaging properties of the microlenses 6, the explained slight pattern difference between the motif layer 5 and microimage elements 3 and the thickness of the support 2, the magnification factor of the image of the microelements 5 and the motif layer 4 and thus the Size of Moire Motif 10.
  • Matching the resulting grid of Moire motif 10, the grid of print layer 7 is selected, which is shown in FIG. 2 merely as a simple bar raster 9 having individual bars. It does not matter, however, which screening is adapted to the other one. Decisive is the mutual vote.
  • the (enlarged) rasterized motif produced by the moiré magnification arrangement is shown in FIG. 3 by way of example in the form of a moiré motif 10.
  • the print motif 8 of the print layer 7 produced by the line grid 9 and the moiré motif 10 are combined to form an overall image 11. This is illustrated in FIG. 4.
  • the different graphs illustrate the proportion of each picture in the overall picture 11.
  • the additive supplement shown in FIG. 4 may in the simplest case be a supplement of black / white information.
  • a complement spectrally different image components is possible, for example, a subtractive color mixing or additive color mixing.
  • erasure can be realized, for example when, in a vertical plan view, the moire motif 10, which is enlarged by the moir6 magnification arrangement, is completely behind opaque structures of the printing motif 8, z. B. the bar raster 9 is located. Looking at the security element then from a point of view not equal to 90 °, the moire motif 10 produced by the Moir6 magnification arrangement appears, since its rasterization is then not (more) covered.
  • the described principle that the screening of the moire motif 10 and the printing motif 8 complement one another can also be used in further exemplary embodiments:
  • the screening of Moire-Motiv 10 and Druck-Motiv 9 can be made to fit together in such a way that the overall information only becomes visible after the print layer has been printed.
  • the print motif 10 can show first information in its raster, and in combination with the raster of the print motif 9 of the print layer 7, a second additional information results.
  • the security element 1 is mounted over a window / opening of a substrate of a value document such that it overlaps the window over a large area.
  • a print motif is attached, the gives information supplementing with information of the moire motif spanning the window.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne un élément de sécurité pour papiers de sécurité, documents de valeur ou similaires, comprenant - un support (2) qui présente une face supérieure, - plusieurs microéléments d'image (6) disposés sur la face supérieure du support (2) et au moins une couche à motif (4) qui est disposée sous les microéléments d'image (6) et forme avec les microéléments d'image (6) un système d'agrandissement moiré qui reproduit un premier motif (10) avant la face supérieure, la position du premier motif (10) dépendant de l'angle d'observation, et - une structure (7) qui est disposée sur les microéléments d'image (6) et qui montre, lorsqu'on regarde la face supérieure, un deuxième motif (10) en position spatiale déterminée par rapport au premier motif (8), - le premier motif (10) étant réalisé comme une image tramée qui présente un premier tramage, et - la structure (7) disposée sur les microéléments d'image (6) étant également réalisée comme une image tramée qui présente un deuxième tramage qui est adapté au premier tramage.
PCT/EP2010/007544 2009-12-17 2010-12-10 Élément de sécurité et son procédé de fabrication Ceased WO2011082760A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10795235.0A EP2512818B1 (fr) 2009-12-17 2010-12-10 Élément de sécurité et son procédé de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009058602.4 2009-12-17
DE102009058602A DE102009058602A1 (de) 2009-12-17 2009-12-17 Sicherheitselement und Herstellverfahren dafür

Publications (1)

Publication Number Publication Date
WO2011082760A1 true WO2011082760A1 (fr) 2011-07-14

Family

ID=43805097

Family Applications (1)

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PCT/EP2010/007544 Ceased WO2011082760A1 (fr) 2009-12-17 2010-12-10 Élément de sécurité et son procédé de fabrication

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Country Link
EP (1) EP2512818B1 (fr)
DE (1) DE102009058602A1 (fr)
WO (1) WO2011082760A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108541238A (zh) * 2015-10-27 2018-09-14 洛桑联邦综合理工学校(Epfl) 通过光与小透镜光栅的叠加层相互作用合成叠置形状图像

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106042744A (zh) * 2016-07-29 2016-10-26 四川省宜宾普什集团3D有限公司 一种具有局部立体光栅的透明塑胶膜片制品及其制作方法
CN111716939B (zh) * 2019-03-19 2021-10-26 中钞特种防伪科技有限公司 光学防伪元件及光学防伪产品

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5712731A (en) 1993-05-11 1998-01-27 Thomas De La Rue Limited Security device for security documents such as bank notes and credit cards
US20050180020A1 (en) 2003-11-21 2005-08-18 Steenblik Richard A. Micro-optic security and image presentation system
WO2007133613A2 (fr) 2006-05-12 2007-11-22 Crane & Co., Inc. Structure de film micro-optique qui seule ou conjointement avec un document ou étiquette de sécurité projette des images en coordination spatiale avec des images statiques et/ou d'autres images projetées
WO2008031170A1 (fr) 2006-09-15 2008-03-20 Securency International Pty Ltd Dispositifs de sécurité à encre en relief séchable par rayonnement destinés à des documents sécurisés

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GB9612496D0 (en) * 1996-06-14 1996-08-14 De La Rue Thomas & Co Ltd Security device
DE102006005000B4 (de) * 2006-02-01 2016-05-04 Ovd Kinegram Ag Mehrschichtkörper mit Mikrolinsen-Anordnung
DE102006029536B4 (de) * 2006-06-26 2011-05-05 Ovd Kinegram Ag Mehrschichtkörper mit Mikrolinsen sowie Verfahren zu seiner Herstellung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5712731A (en) 1993-05-11 1998-01-27 Thomas De La Rue Limited Security device for security documents such as bank notes and credit cards
US20050180020A1 (en) 2003-11-21 2005-08-18 Steenblik Richard A. Micro-optic security and image presentation system
WO2007133613A2 (fr) 2006-05-12 2007-11-22 Crane & Co., Inc. Structure de film micro-optique qui seule ou conjointement avec un document ou étiquette de sécurité projette des images en coordination spatiale avec des images statiques et/ou d'autres images projetées
US20070273143A1 (en) * 2006-05-12 2007-11-29 Crane Timothy T Micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images
WO2008031170A1 (fr) 2006-09-15 2008-03-20 Securency International Pty Ltd Dispositifs de sécurité à encre en relief séchable par rayonnement destinés à des documents sécurisés

Non-Patent Citations (1)

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Title
M.C. HUTLEY; R. HUNT; R.F. STEVENS; P. SAVANDER: "The moire magnifier", PURE APPL. OPT., vol. 3, 1994, pages 133 - 142

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108541238A (zh) * 2015-10-27 2018-09-14 洛桑联邦综合理工学校(Epfl) 通过光与小透镜光栅的叠加层相互作用合成叠置形状图像
US10899161B2 (en) 2015-10-27 2021-01-26 Ecole Polytechnique Federale De Lausanne (Epfl) Synthesis of superpostion shape images by light interacting with superposed layers of lenslet gratings

Also Published As

Publication number Publication date
EP2512818A1 (fr) 2012-10-24
DE102009058602A1 (de) 2011-06-22
EP2512818B1 (fr) 2016-10-12

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