EP2558304A1 - Élément de sécurité doté d'une structure de guidage de lumière localement modifiée pour ce qui est de ses propriétés de propagation de la lumière et procédé de fabrication d'un tel élément de sécurité - Google Patents

Élément de sécurité doté d'une structure de guidage de lumière localement modifiée pour ce qui est de ses propriétés de propagation de la lumière et procédé de fabrication d'un tel élément de sécurité

Info

Publication number
EP2558304A1
EP2558304A1 EP11711369A EP11711369A EP2558304A1 EP 2558304 A1 EP2558304 A1 EP 2558304A1 EP 11711369 A EP11711369 A EP 11711369A EP 11711369 A EP11711369 A EP 11711369A EP 2558304 A1 EP2558304 A1 EP 2558304A1
Authority
EP
European Patent Office
Prior art keywords
core
light
security element
transparent
locally
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.)
Granted
Application number
EP11711369A
Other languages
German (de)
English (en)
Other versions
EP2558304B1 (fr
Inventor
Olaf Dressel
André LEOPOLD
Franziska Peinze
Thomas Löer
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei 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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Priority to PL11711369T priority Critical patent/PL2558304T3/pl
Publication of EP2558304A1 publication Critical patent/EP2558304A1/fr
Application granted granted Critical
Publication of EP2558304B1 publication Critical patent/EP2558304B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • 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
    • B42D25/29—Securities; Bank notes
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F1/00—Designs or pictures characterised by special or unusual light effects
    • B44F1/06—Designs or pictures characterised by special or unusual light effects produced by transmitted light, e.g. transparencies, imitations of glass paintings
    • B42D2033/04—
    • B42D2033/06—
    • B42D2033/18—
    • B42D2033/20—
    • B42D2035/20—
    • 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
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives

Definitions

  • Security element with a locally with respect to their light propagation properties modified photoconductive structure and method for producing such a security element
  • the invention relates to a method for producing a security element, which has a Lichtleitmila, and such a security element.
  • Security items are entities that are used to provide protection against counterfeiting, falsification or duplication.
  • security elements can themselves be designed as value or security documents or integrated into such documents in order to safeguard them against counterfeiting, falsification or copying or to make unauthorized falsification detectable.
  • US Pat. No. 4,710,614 discloses a security document which has a substrate which contains at least one optical fiber whose at least one end is flush with a surface of the substrate in order to be able to prove authenticity of the document by means of a test.
  • the optical fiber has a transparent coating and is disposed in the substrate at a depth that is less than a penetration depth of electromagnetic radiation into the substrate. The electromagnetic radiation penetrating through the substrate is thus captured in the optical fiber and guided there by means of total reflection at an interface of the optical fiber in the optical fiber to the at least one end. During the irradiation of the electromagnetic radiation through the substrate can thus at the one
  • a luminous phenomenon at the exit of the optical fiber for verification can be detected.
  • a security document which comprises a waveguide which is formed by a transparent layer and, for example, is arranged over part of an area over an electroluminescent layer.
  • a surface grating or a volume hologram is provided which deflects a portion of the light exiting the electroluminescent layer into the transparent layer of the waveguide, so that this Light can propagate in the optical fiber.
  • a second grid structure which couples light from the transparent layer of the waveguide through a side surface.
  • the condition for a total reflection at the interface of the transparent layer to a neighboring layer is disturbed, so that at this point a light emission takes place from the transparent layer serving as a waveguide.
  • edge illumination occurs when the fluorescence is excited.
  • the entire document body acts as a waveguide or Lichtleitmila, wherein at the interface document body - air, a total reflection occurs.
  • opaque layers are introduced into such a security document or printed layers are introduced or introduced, the waveguide property of the document is disturbed and edge illumination on excitation of the fluorescence is disturbed. Part of the light now leaves a surface card-shaped document body through the top or bottom and not through the peripheral end edges.
  • the invention is therefore based on the object to provide an improved security element, which utilizes an optical waveguide and this creates a suitable for a verification security feature in which a light emission from an exit surface of the Lichtleit Vietnamese is evaluated.
  • a security element is desirable in which targeted information can be encoded, which can be verified when exciting and evaluating the edge lighting.
  • the invention is based on the idea to create a security element or
  • the optical waveguide structure comprises a transparent core and a likewise transparent cladding, wherein the refractive index of the core is greater than the refractive index of the cladding, such that waveguiding in the core is utilized by utilizing total internal reflection at a core - cladding interface can take place and so a light pipe to an exit surface of the core is possible.
  • a composite of materials in a value or Security document can be integrated and independent of other applied to the layers printed on or between the layers introduced additional security elements or features or can be configured as a value or security document.
  • the transparent material of the core locally targeted under
  • a security element is a structural unit comprising at least one security feature.
  • a security element can be an independent structural unit, which can be connected, for example glued, to a security document, which can also be a value document. It can also be an integral part of a security document.
  • An example of the former is a so-called holopatch (a hologram patch, such as a hologram film portion) adhered to a bill, or a visa stickable to a security document.
  • holopatch a hologram patch, such as a hologram film portion
  • An example of the latter is an identification document
  • a security feature is a structure that (compared to simple copying) can be produced or reproduced only with increased effort or not at all unauthorized, or that makes a forgery or falsification visually and / or mechanically recognizable.
  • Security documents may be mentioned as examples: identity cards, passports, ID cards, access cards, visas, tax stamps, tickets,
  • a credit card for example, represents a security document protected by security features and security elements against counterfeiting and adulteration, which does not directly represent a value beyond the pure material value of the card, but makes it possible to dispose of large assets.
  • An optical fiber is a fiber of a transparent material to whose
  • Total internal reflection can be a conduit of light inside the fiber.
  • a pattern typically consists of a plurality of juxtaposed pattern units.
  • the pattern units of a pattern are associated with each other and arranged in a defined manner laterally to each other, typically in single or
  • Two-dimensional dimensions and in the overall view, provide a representation, such as a picture, a symbol, a logo, a lettering (letters, numbers, alphanumeric characters) or a code (e.g., a bar code).
  • a representation such as a picture, a symbol, a logo, a lettering (letters, numbers, alphanumeric characters) or a code (e.g., a bar code).
  • Individualization pattern is a pattern that is used for customization.
  • Individualizing is a pattern when it is unique to a person or a person
  • a code individualizing a group of persons within the total population of a country is the city of residence.
  • An individualizing for a person code for example, the number of the identity card or passport photo.
  • individualizing code is the value. Individualizing for a banknote is the serial number. Non-individualizing is a pattern that is identical for all elements of an entity. For bills this is for example a coat of arms, which is printed on all banknotes.
  • Total reflection takes place.
  • Light or generally electromagnetic radiation propagating in the medium of greater refractive index and blunt Angle on the interface of the optically denser medium (the medium having the higher optical refractive index) to the optically thinner medium (medium having the lower optical refractive index) measured at an angle measured against a surface normal of the interface, which is greater than a critical angle is reflected back into the optically denser medium.
  • An optical waveguide or waveguide is thus understood to mean a process in which light is reflected at the boundary surfaces of a medium and thus a directed propagation of light in the medium along its extent is possible.
  • volume transmission property here is the property of a medium
  • a transparent medium thus has a high volume transmission, whereas an opaque medium has a very low or no volume transmission.
  • electromagnetic radiation whose wavelength can extend from the infrared wavelength range over the visible wavelength range to the ultraviolet wavelength range.
  • a composite material which has a transparent core and at least two opposite side surfaces also has a transparent shell.
  • the material of the core has a higher refractive index than the material of the shell.
  • a method for producing a security element which has a Lichtleitmila, wherein the Lichtleit MUST comprises a transparent core and a likewise transparent jacket, wherein the refractive index of the core is greater than the refractive index of the shell, so that in the core
  • Waveguide taking advantage of a total reflection at the interface sheath - core can take place and so an optical waveguide to an exit surface of the core is possible, wherein it is provided, the transparent material of the core locally targeted under Use of a preparation to change locally in its volume transmission properties.
  • a security element comprising a light guiding structure, wherein the light guiding structure comprises a transparent core and a likewise transparent shell, and wherein the refractive index of the core is greater than the refractive index of the shell, so that a total reflection to the optical waveguide at the interface core - cladding can take place in that an optical waveguide to an exit surface of the core is possible, wherein it is provided that a volume transmission characteristic of the core is locally modified so that a waveguide in the optical waveguide structure at the exit surface causes a pattern caused by the locally modified volume transmission characteristic.
  • the volume transmission properties of the core are preferably modified by means of a locally applied preparation.
  • the preparation is applied by means of a printing process.
  • all printing processes come into consideration with which targeted a liquid preparation on the core or, if the core is already surrounded by the jacket, can be applied to the Lichtleit Weg.
  • the preparation comprises colorants.
  • Colorants include dyes and colored pigments. In such a
  • Embodiment are diffused by means of the preparation in the core color particles, which change the transmission properties locally, in particular reduce transmission for single or all wavelengths.
  • the local modifications of such a security element thus include diffused colorants.
  • the modification can be carried out by applying one and the same or different preparations to one or both sides of a flat-shaped core, which may be, for example, a transparent plastic film.
  • a flat-shaped core which may be, for example, a transparent plastic film.
  • different sides preferably opposite side of the core, accelerate modification in depth from the surface. If, for example, colorants are introduced locally into the core by means of diffusion, then the required substance and also the time required for achieving a diffusion of the colorants, the for example, penetrate an entire film layer locally reduced.
  • transparent and colored transparent films can be used as the core material. If locally different colorants are diffused in, the resulting pattern can be, for example, that different wavelengths are restricted differently with regard to their transmission through the core and thus a colored pattern can be observed if white light is coupled into the core.
  • the volume transmission properties of the core may also be locally modified via a preparation comprising solvents. This makes it possible, for example, to locally convert a transparent film into a translucent film in which locally diffuse light scattering occurs. In one embodiment, therefore, the local
  • the local modification in the core before it is coated with the shell.
  • the jacket can be coated on the core in any manner, for example, be printed as a thin layer.
  • Modifications between two also transparent films is arranged, which have a lower refractive index.
  • An assembly of the core forming film with the jacket films can be done for example via a lamination.
  • the core is applied by printing technology or otherwise, for example by means of doctoring, to a film forming the jacket. It is also possible to use both the shell and the core by means of successive To produce coating and / or printing steps. So first, one
  • first cladding layer or the second cladding layer or even both cladding layers can also be formed by a film.
  • the jacket preferably has a refractive index which corresponds to that of the other films.
  • this is a light source in the
  • the light source may be any light source which is photometrically coupled with the core for light coupling into the core.
  • Light sources are in particular luminescent layers into consideration. Both photoluminescent and electroluminescent layers come into consideration here. The latter are excited by applying an electric field to emit light. Photoluminescent layers are excited by electromagnetic radiation to emit light.
  • luminescent substances are integrated into a volume region of the core or the core is provided with such a region. If the optical waveguide structure has a planar design and extends, for example, over the entire surface of a value or security document into which it is to be integrated or integrated, then light can be radiated via the front or rear side of a card-shaped security document to form a light pipe in the
  • Initiate light guide structure it is possible to provide a film provided with luminescent substances adjacent to a side edge of a planar design
  • the luminescent substances can be designed so that they are excited, for example, with visible, infrared or ultraviolet radiation. It is also possible the generated luminescence radiation lies in the visible or invisible wavelength range, so that verification of the security element can only take place with the aid of corresponding detection devices for the corresponding wavelength range in the ultraviolet or infrared. Furthermore, it is possible to introduce different luminescent substances into the core or another light source, so that the luminescence radiation generated comprises light of different wavelengths, which is then optionally filtered differently by the local modifications.
  • Diffusion can be applied to the core to the local
  • the sheath or the core is formed by a thin layer, which only one
  • Layer thickness which is in the order of three to twenty times the light wavelength provided for the light pipe, preferably three to ten times, more preferably three to five times this wavelength, can by printing application of information, such as a photograph of a person the information is coupled to the light guiding structure. If a printing ink is used, which is produced on the same chemical basis as the outer surface of the light guide, then a nearly homogeneous connection between the printed ink containing the printed information and the jacket material may result. In such a case, the printing information usually can not be removed without removing or at least damaging the cladding layer or even the core layer. Preferably, we arranged the printing information about the area in which the light generation or coupling takes place in the optical waveguide.
  • the core of the optical waveguide is interspersed only locally with luminescent substances or pigments and only this region is provided for a photoluminescence excitation
  • the information is preferably applied to or in the lateral surface over this region, which is also referred to as a light-collecting field. Then find one
  • Modification of the light collecting field instead, for example, by removing parts of the light image and thereby the cladding layer is locally destroyed, so in this area an optical waveguide on total reflection at the interface is not possible.
  • at least a portion of the light collection field fails to direct fluorescent light into the remainder of the core.
  • an intensity of the observable edge illumination at the exit surface is reduced or almost completely suppressed. If the printing information is applied in a region between the light source and the exit surface and damaged in a modification, the lateral surface underneath, a similar effect can be observed, since in this area the optical waveguide is reduced or prevented by total reflection and only a transmission parallel to Core-oriented light radiation can take place, but which represents only a very small part of the total light intensity.
  • the luminescent substances are arranged only in a partial region of the core in order to form a light-collecting region.
  • the optical waveguide structure is expanded in area and takes place
  • the core and the cladding polymers are used, which have a different refractive index.
  • Preferred polymers are
  • PC Polycarbonate
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PVC polyvinyl chloride
  • PVB polyvinyl butyral
  • PMMA polymethyl methacrylate
  • PI polyimide
  • PVA polyvinyl alcohol
  • PS polystyrene
  • PVP polyvinylphenol
  • Polypropylene PP
  • PE polyethylene
  • TPE thermoplastic elastomers
  • TPU thermoplastic polyurethane
  • ABS acrylonitrile-butadiene-styrene
  • coextruded films containing, among others, these materials, as well as hybrid materials containing, among others, the above-mentioned materials.
  • Particularly preferred is polycarbonate.
  • In a particularly preferred embodiment may be made and shell of the same polymer, with different
  • Refractive indices are generated by different additives. As a result, a particularly intimate connection between the shell and core is achieved.
  • Suitable additives are, in particular, TiO 2 having a particle diameter which is less than half the wavelength, in particular less than 100 nm.
  • the security element is extended as a flat
  • a light pipe can be parallel to the surface extension and the
  • Exit surface is part of an edge of the value or security document or is connected to the edge via transparent materials.
  • the security element is formed as a composite body, which is provided at least on one side with an adhesive layer, wherein the adhesive layer is preferably thermally activated.
  • Fig. 1 is a schematic perspective view of a security element
  • FIG. 2a is a schematic plan view of a core for identifying the areas modified by printing technology
  • Fig. 2b is a schematic view of an edge of the core of Fig. 2a;
  • Fig. 3 is a schematic view of an edge where local modification is effected by applying a formulation to a surface of a core
  • Fig. 4 is a schematic view of an edge of a core, in which a
  • Modification is effected by applying preparations to opposite side surfaces of the core;
  • Fig. 6 is a schematic plan view of a core for identifying the modified areas
  • Fig. 7 is a schematic sectional view of a security document in which the core of Fig. 6 is integrated.
  • Fig. 8 is a schematic sectional view through another
  • a security element 1 is shown schematically.
  • This comprises a transparent core 2, which is expanded in the illustrated embodiment area. Adjacent to an upper side 3 of the core 2 and a lower side 4 of the core 3, a jacket 7 consisting of foils 5, 6 is arranged.
  • the films 5, 6 are also transparent.
  • the transparent core 2 has a refractive index n-, which is greater than a refractive index n 2 of the films 5, 6.
  • plotted) of the interface is greater than a critical angle which is determined by the
  • Refractive indices rn 2 of the transparent core 2 and the films 5, 6 of the shell 7 is dependent.
  • the transparent core 2 and the transparent jacket 7 or the films 5, 6 may be clear or colored transparent.
  • a preparation which comprises, for example, color pigments. These color pigments are diffused into the core from the upper side 3 into the volume regions 8 - 10.
  • the amount of applied Preparation selected so that the diffusion from the top 3 by more than half of a material thickness 14 of the core 2 extend into this. If the color pigments are selected such that they are black, for example, and absorb light of all visible wavelengths, a transparency for visible light in the volume regions 8-10 is significantly reduced or reduced to zero.
  • a light pattern which comprises two bright fields 16, 17 which extend over the entire material thickness 14 of the core 2.
  • the light fields 16, 17 are delimited by fields 18-20, the half of which facing the upper side 3 is dark in each case and its side facing the lower side 4 of the core 2 is light.
  • the light guided in the core is thus changed due to the changed volume transmission properties in the volume regions 8-10. This change can be seen in a consideration of the side edge 15 during the light pipe in the core 2 and this is a Verification of
  • Security elements 1 possible.
  • the security element 1 is designed as a light-guiding structure.
  • FIG. 2a the plan view is shown on another core 2 for a security element.
  • surface areas 21 -24 to the one or
  • different formulations may be applied by printing technique to maintain the core 2 in its volume, i. in volume areas below the surface areas 21-24, to modify locally in its volume transmission properties.
  • Fig. 2b the resulting view of a side edge 25 of the core 2 of Fig. 2a is shown schematically. Good to see are the surface areas 21 to 23 corresponding volume areas 26-28, which extend in this embodiment over an entire material thickness 14 of the core 2. Between the opaque formed in this embodiment by the diffusion of color pigments
  • Volume regions 26-28 remain light channels 29, 30, in which the guided in the core light can propagate unfiltered and thus exits the edge 25.
  • the volume transmission property can also be changed only for individual wavelengths.
  • Fig. 3 is a schematic sectional view of a core is shown, which has been changed in terms of its volume transmission properties by the top 3 has been applied to a preparation and a diffusion from the top has taken place. In a region adjacent to the top, a transmission is changed.
  • Fig. 4 is a schematic sectional view through the core 2 is shown, which has been modified in terms of its volume transmission properties by diffusion over both the top 3 and the bottom 4 has taken place in the volume of the core.
  • the diffusion is such that it extends only about one third of a material thickness of the entire core in the volume of the core.
  • FIG. 5 schematically describes a flow chart of a method for producing a security element.
  • the core is provided in the form of a core sheet 41.
  • one or more formulations are preferably applied to individual regions of the core film by printing technology. These include, for example, color pigments or also solvents, in order to formulate the core over one
  • a big advantage is that almost no material is applied to or removed from the core film, so that their
  • the local volume modifications can be made by diffusing color pigments 43 or by solubilizing the core 44.
  • Phosphoreszenzpigmente to use to cause any Lichteinkopplung in the core as a light guide.
  • the fluorescent pigments are then excited via external radiation, which is radiated, for example, perpendicularly to a surface of a flat core film. The fluorescence and / or
  • Phosphorescent pigments then emit light which is provided for the light conduction in the security element.
  • the provided core foil may already contain luminescent elements.
  • the core is coated in the embodiment of the method described with the jacket 46. This can be done for example by printing technically transparent plastic material is printed, the refractive index of which is less than the refractive index of the core. For others
  • the core film is laminated between transparent cladding films and bonded to them, for example via a lamination. This is particularly advantageous if the core film with the jacket films and other films in one
  • a film or a film applied to a film serves as a cladding layer. Then another layer is applied as a core, for example by means of doctoring. The remaining steps can then be carried out analogously to the steps 42 to 47 according to the embodiment of FIG. 5.
  • FIG. 6 schematically shows the plan view of a core foil 2. Marked are areas 51 and 52 to which preparations are applied to modify underlying bulk areas of the core. While luminescent particles are diffused into the volume area below the area 51 to form a light collecting area form, into the volume area under the area 52 color particles, for example, black color pigments, diffused.
  • FIG. 7 schematically shows a value or security document 61 in which the core 2 according to FIG. 6 is integrated.
  • cladding layers 62, 63 are formed. These are applied for example by printing on the core.
  • a further print layer 65 for encoding information such as a light image.
  • a refractive index of the printing ink is preferably matched to the refractive index of the cladding layer 62.
  • the printing ink with which the printing layer 65 is formed is formed on the basis of the same plastic material with which the cladding layer 62 is printed on the core 2.
  • Security element 66 is joined together with further films 67-69, which may include additional print layers 70, 71, to a document body 72 of security document 61, preferably via a lamination process.
  • further films 67-69 which may include additional print layers 70, 71, to a document body 72 of security document 61, preferably via a lamination process.
  • Light pipe is passed in the core to an exit edge 75. While the light 76 used for the excitation can be called primary light, fluorescent light 77 generated by the luminescent substances, called secondary light, is conducted to the exit edge 75 in the core 2.
  • a volume area 78 which corresponds to the volume area below the area 52 according to FIG. 6, a light transmission in the volume of the core 2 is prevented, so that a light exit from the exit edge 75 of the security element 66 does not have the same intensity over the entire area, but instead in the area adjacent to the volume area 78 shows no or a significantly reduced light emission.
  • the printing layer 65 also becomes the
  • Sheath layer 62 destroyed locally.
  • a portion of the secondary light 77 which is generated in the Lichtsammei indicative 64 and would have to be deflected for a waveguide in the region of the light image on the cladding layer via a total reflection back into the core 2, not reflected, so that this secondary light component of the Security document 61 via the top 73 emerges and not on the
  • FIG. 8 shows a further embodiment of the security document 81 in which a light-guiding structure 82 is integrated.
  • This comprises a core 2, which is provided with a jacket 7, and volume regions 83, which have a transmission property different from that of the remainder of the core 2.
  • the light guiding structure 82 is coupled to a light source 84, which is concealed by opaque film sections 85, for example.
  • This may be any light source which can be activated, for example, by energy supplied from outside in the form of current or an alternating electromagnetic field.
  • it may be an organic light emitting diode.
  • the light of the light source 84 is coupled in the core to the light pipe and filtered by the volume regions 83, so that at an exit edge 86 a through the

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément de sécurité (1) ainsi qu'un élément de sécurité (1), en particulier pour un document de valeur ou de sécurité, comprenant une structure de guidage de lumière, la structure de guidage de lumière comportant un noyau (2) transparent et une enveloppe (7) également transparente et l'indice de réfraction du noyau (2) étant supérieur à l'indice de réfraction de l'enveloppe de sorte qu'une réflexion totale vers le guidage d'ondes lumineuses peut avoir lieu sur l'interface noyau (2)-enveloppe (7) et qu'ainsi un guidage d'ondes lumineuses vers une surface de sortie (75) du noyau (2) est possible, une propriété de transmission volumique du noyau (2) étant localement modifiée de sorte qu'en présence d'un guidage de lumière, on peut observer dans la structure de guidage de lumière sur la surface de sortie (75) un motif d'intensité de la lumière sortante qui dépend du lieu de sortie et est dû à la propriété de transmission volumique localement modifiée.
EP11711369.6A 2010-04-15 2011-03-31 Élément de sécurité doté d'une structure de guidage de lumière localement modifiée pour ce qui est de ses propriétés de propagation de la lumière et procédé de fabrication d'un tel élément de sécurité Active EP2558304B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11711369T PL2558304T3 (pl) 2010-04-15 2011-03-31 Światłowodowy element zabezpieczający, z miejscowo zmodyfikowaną strukturą przewodzącą światło, oraz sposób wytwarzania takiego elementu zabezpieczającego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010015258A DE102010015258A1 (de) 2010-04-15 2010-04-15 Sicherheitselement mit einer lokal hinsichtlich ihrer Lichtausbreitungseigenschaften modifizierten lichtleitenden Struktur und Verfahren zur Herstellung eines solchen Sicherheitselements
PCT/EP2011/055043 WO2011141227A1 (fr) 2010-04-15 2011-03-31 Élément de sécurité doté d'une structure de guidage de lumière localement modifiée pour ce qui est de ses propriétés de propagation de la lumière et procédé de fabrication d'un tel élément de sécurité

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US9402065B2 (en) 2011-09-29 2016-07-26 Qualcomm Incorporated Methods and apparatus for conditional display of a stereoscopic image pair
WO2016190937A1 (fr) * 2015-03-09 2016-12-01 Massachusetts Institute Of Technology Guide d'ondes chargé en phosphore
DE102016011220A1 (de) 2016-09-16 2018-03-22 Giesecke+Devrient Mobile Security Gmbh Kartenförmiger Datenträger mit optischen Merkmalen
DE102017008152A1 (de) * 2017-08-28 2019-02-28 Giesecke+Devrient Mobile Security Gmbh Portabler Datenträger
WO2020097095A1 (fr) * 2018-11-06 2020-05-14 CLEARink Display, Inc. Rétroréflecteur à grande luminosité pour des affichages d'image statiques et commutables
CN109409323A (zh) * 2018-11-09 2019-03-01 银河水滴科技（北京）有限公司 一种酒后驾驶检测方法及装置

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FR2583794B1 (fr) 1985-06-24 1988-09-23 Arjomari Prioux Document de securite utilisant des fibres optiques, procede de fabrication et procede d'authentification.
CH677905A5 (fr) * 1989-02-20 1991-07-15 Orell Fuessli Graph Betr Ag
EP1827866B1 (fr) 2004-11-23 2009-05-27 Orell Füssli Sicherheitsdruck AG Document de securite comprenant une source lumineuse et dispositif de traitement de la lumiere
DE102008033716C5 (de) * 2008-07-14 2014-04-17 Bundesdruckerei Gmbh Wert- oder Sicherheitsdokument mit einer Lichtleitstruktur und lokalen Lichtaustrittsstellen an einer Oberseite sowie Verfahren zu dessen Herstellung
DE102008033718B4 (de) * 2008-07-14 2021-07-29 Bundesdruckerei Gmbh Sicherheitsdokument mit einem Lichtleiter

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WO2011141227A1 (fr) 2011-11-17
PL2558304T3 (pl) 2014-09-30
DE102010015258A1 (de) 2011-10-20
EP2558304B1 (fr) 2014-05-07

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