EP3922476A1 - Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur - Google Patents

Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur Download PDF

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Publication number
EP3922476A1
EP3922476A1 EP20020273.7A EP20020273A EP3922476A1 EP 3922476 A1 EP3922476 A1 EP 3922476A1 EP 20020273 A EP20020273 A EP 20020273A EP 3922476 A1 EP3922476 A1 EP 3922476A1
Authority
EP
European Patent Office
Prior art keywords
luminescence
layer
carrier element
wavelength
marker
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.)
Withdrawn
Application number
EP20020273.7A
Other languages
German (de)
English (en)
Inventor
Henning Geiseler
Thomas Happ
Thomas Giering
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 Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Priority to EP20020273.7A priority Critical patent/EP3922476A1/fr
Priority to US18/008,855 priority patent/US20230226841A1/en
Priority to PCT/EP2021/025198 priority patent/WO2021249671A1/fr
Priority to EP21736243.3A priority patent/EP4164893A1/fr
Publication of EP3922476A1 publication Critical patent/EP3922476A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • 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
    • B42D25/373—Metallic materials
    • 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
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/205—Matching spectral properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns
    • 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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D2207/00—Paper-money testing devices

Definitions

  • the invention relates to a document of value with a carrier element and a film element.
  • the invention also relates to a method for classifying a corresponding document of value.
  • banknotes It is known to make documents of value, in particular banknotes, more forgery-proof by forming banknotes with a luminescent security marker or a luminescent marker in or on the paper substrate or polymer substrate.
  • documents of value in particular bank notes, usually have a film element in addition to a carrier element, for example a paper substrate or a polymer substrate.
  • a film element is often glued to the carrier element.
  • a growing class of counterfeit banknotes relates to so-called composed banknote counterfeits, which have different proportions of real banknotes as well as forged portions, for example photocopied portions.
  • Counterfeiters detach the foil element, which is usually designed as a level 1 security feature such as a foil strip or a foil patch, from a real banknote or cut it out.
  • the real film element is then applied, for example, to a fake carrier element.
  • a fake film element for example a photocopy, can also be applied to the real carrier element on which the real film element was previously attached.
  • a manipulated bank note with a real foil element on a fake carrier element can be recognized as tampered with by known methods by detecting a luminescence marker in the carrier element.
  • a further safeguarding of the film element and a corresponding checking method with suitable sensors are required.
  • a conventional luminescent marker in the carrier element can therefore only protect composite banknotes to a limited extent.
  • two separate methods can be useful for identifying both types of composite counterfeit banknotes.
  • the object of the invention is to create a solution as to how the forgery-proofness of a document of value can be increased with a carrier element and a film element.
  • a value document according to the invention in particular a bank note, has a carrier element and a film element arranged in a partial area of the carrier element.
  • the carrier element has a luminescent marker at least in the partial area.
  • the luminescence marker is set up to emit luminescence radiation.
  • the luminescence radiation has at least a first wavelength and a second wavelength.
  • the first wavelength and the second wavelength are each formed in the infrared spectral range.
  • the first and second wavelengths are preferably different by at least more than 30 nm, more preferably by more than 50 nm, particularly preferably by more than 100 nm.
  • the film element has a reflective layer and a spectral selection layer. The selection layer is arranged between the carrier element and the reflective layer.
  • the reflective layer is designed in particular to intentionally reflect infrared radiation.
  • the selection layer is designed to spectrally selectively inhibit transmission of infrared radiation.
  • the inhibition of the transmission of the first wavelength and the inhibition of the transmission of the second wavelength differ by at least 10%, in particular at least 20%, indicated in absolute percentage points.
  • the invention is based on the knowledge that a more secure document of value can be provided with the reflection layer and the spectral selection layer in the film element.
  • the luminescence marker in the carrier element and the selection layer and the reflective layer in the film element create a composite security feature which can be used to check whether the combination of carrier element and film element is genuine.
  • IR infrared
  • the film element is, in particular, a layered security element, e.g. a hologram patch, security thread or strip with micromirrors, microlenses or other optically variable elements, which contains an IR absorber substance.
  • a layered security element e.g. a hologram patch, security thread or strip with micromirrors, microlenses or other optically variable elements, which contains an IR absorber substance.
  • the film element is designed in particular in such a way that the IR absorber does not have to be detected in transmission, as was previously the case, but instead takes place indirectly by measuring the IR-luminescent luminescent marker in remission geometry from the side of the value document facing away from the film element.
  • the excitation of the luminescence or the luminescence feature or the luminescence marker is carried out in particular from the side of the value document facing away from the film element.
  • the light emitted by the IR-luminescent luminescent marker interacts in particular with the spectral selection layer in the film element and is reflected in particular by the broadband reflective or scattering reflective layer in the film element and passes through the carrier element of the document of value in order, for example, to be subsequently detected by a detector.
  • the reflective layer reflecting in a directional or diffuse manner due to scattering throws back, for example, at least 50%, preferably at least 80%, of the incident luminescent light.
  • the carrier element or banknote substrate can be, for example, a paper substrate, for example made of cotton, a polymer substrate, for example made of BOPP (biaxially oriented polypropylene), or a hybrid substrate made of a paper core with outer polymer layers (hybrid) or a polymer core with act on the outer layers of paper.
  • the carrier element for the infrared luminescence radiation is translucent, that is, at least part of the luminescence radiation impinging on the carrier element or generated in the volume of the carrier element can penetrate the carrier element and emerge at the surface of the carrier element. This can be a directional transmission or the radiation transport can also take place diffusively and thus non-directionally due to corresponding scatter contributions.
  • the luminescence marker is preferably embedded in the volume of the carrier element during the respective paper or polymer production or, alternatively, applied to an inner surface in the case of hybrid substrates or an outer surface.
  • printing techniques such as offset printing, intaglio printing, flexographic printing, screen printing or digit printing, full-surface coatings or lines are also possible.
  • the luminescence marker preferably emits infrared radiation in the wavelength range from 750 nm to 2500 nm, in particular from 800 nm to 2200 nm.
  • the structure and properties of the film element are preferably matched to the IR luminescence marker in order to be able to more effectively demonstrate the presence of the same via the interaction of the luminescence radiation with the spectral selection layer in the film element.
  • the reflection layer and the selection layer are in particular formed separately, preferably at a distance.
  • the film element is designed as a layered security element. Due to the layer-like structure, the selection layer can be arranged effectively and safely between the reflective layer and the carrier element. The security of the value document is increased.
  • the structure of the film element can, however, also be significantly more complex and consist of several polymer layers, for example several plastic layers (foils), lacquer layers and adhesive layers, and also have several metallic and / or dielectric layers.
  • some layers can be transparent or translucent or opaque, have different layer thicknesses, consist of different materials, and can be continuous or partially cut out or printed in the form of patterns or letters.
  • all layers between the carrier element and the selection layer and / or between the selection layer and the reflection layer are transparent or translucent for IR light. This means, in particular, that the reflectivity of the reflective layer of in particular at least 50% at least for the first or second wavelength is also achieved when measured from the surface of the film element facing the carrier element, i.e. preferably through all layers lying between the carrier element and the reflective layer will.
  • the foil element itself is preferably designed in such a way that the selection layer is located in an inner layer of the foil element and thus inevitably detaches itself from the bank note when the foil element is detached.
  • the film element is designed as a hologram and / or security thread and / or security strip.
  • the reflective layer of the film element can thereby have two functions. A first function, such as the visual protection against forgery by means of an iridescent hologram, and a second function, the reflection property for the luminescent radiation. This in turn makes the value document more secure.
  • the film element is designed with at least one optically variable element, in particular a micromirror array and / or a microlens array.
  • An optically variable element is characterized in particular by an appearance that is dependent on the viewing angle or the angle of incidence of light.
  • the design as an optically variable element is advantageous, since optically variable elements often have a reflective metal layer, which can now also be used as the reflective layer. The forgery-proof nature of the document of value can also be further increased by the optically variable element.
  • the reflective layer can have a directed or a diffuse (scattering) reflectivity.
  • the reflective layer can be a metal layer or a metal layer stack, for example made of Al, or a white colored layer, for example TiO 2 .
  • the film element is applied, in particular at least partially, to a surface of the carrier element.
  • the film element is preferably firmly connected to the carrier element.
  • the film element can for example be glued or welded onto the carrier element.
  • the reflective layer and the selection layer are designed to overlap when viewed perpendicular to the carrier element, in particular perpendicular to the main direction of extent of the carrier element. This means in particular that radiation from the luminescence marker in the partial area which passes through the selection layer also hits the reflection layer. After the reflection, the radiation reflected by the reflection layer arrives again in particular at the selection layer and passes through it again.
  • the selection layer is designed as an absorption layer.
  • the absorption layer is designed in particular to at least partially absorb infrared radiation. The intensity of this radiation can be inhibited by the absorption of the infrared radiation.
  • the absorption layer is designed to absorb at least the first wavelength and / or the second wavelength or to reduce the respective intensities of the wavelengths.
  • the absorption layer is preferably designed to absorb or inhibit the intensities of the wavelengths to different degrees.
  • the absorption layer can be designed to inhibit incident radiation only in part of the incident spectrum, the selection spectral range. Compared to a reflective selection layer, an absorption layer preferably has a simpler structure and is therefore easier and cheaper to integrate into a film element.
  • the selection layer can be designed as a spectrally selectively reflecting selection layer.
  • the first wavelength can be reflected by the selection layer and the second wavelength can penetrate the selection layer.
  • the reflective layer is preferably designed as a broadband absorbing layer. In this case, it can also be the case that a further broadband absorbing layer is arranged between the selection layer and the reflection layer.
  • the reflection layer has a reflection spectral range and the selection layer has a selection spectral range
  • the Reflection spectral range is broader than the selection spectral range.
  • a broader range of the infrared radiation of the luminescence marker is reflected by the reflective layer than is inhibited by the selection layer. Due to the broader reflection spectral range, the reflection layer can be used at the same time for visual effects of the film element in the visible spectral range.
  • the reflective layer is set up to reflect at least 50%, preferably at least 80%, of a luminescent radiation emitted by the luminescence marker and incident on the reflective layer. This reflection property can then be used to detect reflected luminescence radiation in order to form a clearer spectral signature.
  • the value document is made more secure as a result.
  • the luminescence marker is embedded in the carrier element.
  • the luminescent marker or the luminescent material can already be introduced into the carrier element during production thereof.
  • the luminescence marker can, for example, be introduced into the paper in the case of a carrier element designed as paper. This is advantageous because the luminescence marker is inextricably linked to the carrier element and the value document is made more secure.
  • the luminescence marker can also be applied to a surface of the carrier element.
  • the luminescence marker can be arranged on the side of the carrier element facing away from the film element, so that the luminescence radiation falls through the carrier element onto the film element, in particular the selection layer and the reflection layer.
  • the luminescence marker can, however, also be arranged on the side facing the film element, in particular between the carrier element and the film element.
  • the value document has a multiplicity of luminescence marker particles as the luminescence marker.
  • the luminescence marker particles are preferably distributed, in particular completely, in the carrier element or over the carrier element.
  • the document of value has a document class-specific spectral signature which is dependent on a luminescence radiation emitted by the luminescence marker and incident on the selection layer, and in particular on the reflective layer.
  • the spectral signature is in particular made up of intensity values formed by several different infrared spectral ranges.
  • the different spectral ranges are preferably filtered or inhibited differently by the selection layer, as a result of which the spectral signature is created.
  • the reflective layer can be designed to be broadband, diffusely reflective.
  • the selection layer can be designed as an absorptive edge filter.
  • the film element can be designed with a visual feature comprising a microlens arrangement with an underlying diffusely reflective, optionally printed, white color layer.
  • the white paint layer can serve as a reflective layer.
  • the luminescence radiation emitted by the excited luminescence marker is spectrally inhibited or filtered by a selection layer of the film element before it is detected in step b).
  • the selection layer is preferably designed as an absorption layer.
  • the selection layer inhibits at least a spectral portion of the luminescent light hitting the selection layer from penetrating the selection layer, i.e. at most only part of the intensities of the inhibited wavelengths reach the reflective layer.
  • a clear spectral signature or combination signal curve can be generated by the selection layer. The value document can thereby be classified more securely, and the presence and authenticity of the film element can be proven.
  • the luminescence radiation emitted by the excited luminescence marker first hits the selection layer and only then hits the reflective layer. After the reflective layer, it can then be the case that the radiation reflected by the reflective layer passes through the selection layer again before it is detected.
  • the selection layer is accordingly arranged in particular between the carrier element and the reflective layer.
  • the spectral signature can be formed with a higher information content, whereby the value document can in turn be formed more securely.
  • a direct luminescence intensity of the luminescence marker outside the sub-area, in particular within a further sub-area different from the sub-area, is recorded on the direct propagation path and the classification is carried out in step d) on the basis of the direct luminescence intensity and the intensity recorded in step b) will.
  • the direct luminescence intensity is recorded directly, that is to say without having been reflected by the reflective layer.
  • the reference intensity is provided by a direct luminescence intensity of the luminescence marker that is detected outside the sub-area and on the direct path of propagation.
  • the further sub-area in particular also includes the luminescence marker, but is arranged outside the area of overlap with the film element.
  • the film element is only present in the partial area and not in the further partial area.
  • the recorded intensity of the further sub-area is compared with the recorded intensity of the sub-area.
  • the intensity that is detected by a luminescence marker outside the sub-area is compared with the intensity that is detected by a luminescence marker within the sub-area.
  • the intensity from the further sub-area or outside the sub-area can be used or provided as the reference intensity.
  • the use of the intensity of the further sub-area as a reference intensity is also referred to as self-reference.
  • the combination intensity detected in step b) comprises luminescence radiation that is emitted by the excited luminescence marker in the direction of the film element, is then spectrally inhibited in the spectral selection layer of the film element, is then reflected by the reflective layer and then again by the spectral selection layer is spectrally inhibited.
  • Fig. 1 shows schematically an embodiment of a value document 1.
  • the value document 1 has a carrier element 2.
  • the carrier element 2 in turn has a partial area 3.
  • a film element 4 is arranged in sub-area 3. Furthermore, the carrier element 2 has a luminescence marker 5 in the sub-area 3.
  • the luminescence marker 5 is designed as a multiplicity of, preferably powdery, particles.
  • the luminescence marker 5 is designed to emit luminescence radiation 6.
  • the luminescence radiation 6 has at least a first wavelength 7 in the infrared spectral range and a second wavelength 8 in the infrared spectral range.
  • the luminescent substance used for the luminescent security marker or luminescent marker 5 can be, for example, organic, organometallic or inorganic luminescent substances.
  • the excitation of the luminescent substances is preferably in the visible or infrared spectral range. Luminescent substances in which both excitation and emission lie in the infrared spectral range are particularly suitable, since here particularly low scattering losses and thus particularly high intensities occur during the rear measurement through the carrier element 2.
  • luminescent substances are inorganic pigments doped with one or more rare earth elements, in particular with the dopants neodymium or ytterbium or erbium or thulium or holmium, or doped with certain transition metals.
  • the combination of ytterbium with a further dopant is preferred, in particular Erbium, thulium, neodymium or holmium.
  • organometallic complexes in particular with neodymium or holmium or erbium or thulium or ytterbium, or certain organic substances can be used.
  • a single luminescent substance or a mixture or a combination of several luminescent substances can be used for the luminescent marker 5.
  • the first and the second wavelength of the luminescence emission can be emitted by the same luminescent substance or by different luminescent substances of the luminescent marker 5.
  • the document of value 1 can comprise further feature substances which increase the security against forgery, for example further luminescent substances.
  • luminescence markers 5 with different spectral signatures can also be combined in the value document 1.
  • the luminescence marker 5 can be present as a mixture with the further feature substance, or the luminescence marker 5 and the further feature substance can be present at different locations on the value document 1, for example in the volume or on one or both surfaces of the value document 1.
  • the first wavelength 7 can be 1100 nm, for example.
  • the second wavelength 8 can be 1600 nm, for example.
  • the film element 4 has a reflection layer 9 and a spectral selection layer 10.
  • the selection layer 10 is arranged between the carrier element 2 and the reflective layer 9.
  • the reflection layer 9 and the selection layer 10 are arranged parallel to one another.
  • the reflective layer 9 is designed to reflect infrared radiation, in particular the luminescent radiation 6.
  • the selection layer 10 is designed to spectrally selectively inhibit the transmission of infrared radiation, in particular the luminescence radiation 6.
  • the inhibition of the transmission through the selection layer 10 is at least 10% more or less at the first wavelength 7 than the inhibition of the transmission of the second wavelength 8, given in absolute percentage points. If the transmission through the selection layer 10 amounts to the first If the wavelength 7 is 50%, for example, the transmission through the selection layer 10 at the second wavelength 8 is preferably either at least 60% or at most 40%.
  • the selection layer 10 is preferably designed as a spectrally selective absorption layer. This means that the absorbing selection layer 10 at least partially absorbs certain wavelengths or wavelength ranges. In particular, the selection layer 10 has an IR absorber.
  • inorganic, organometallic or organic pigments or dyes are used for the IR absorber in the selection layer.
  • the absorber layer is preferably printed on during the production of the film element.
  • the IR absorber is then in particular in the form of pigment particles or a dye embedded in a printing ink.
  • Suitable inorganic pigments can include, for example, oxides, halides, phosphates, chalcogenides, vanadates, silicates, germanates of transition metals (e.g. Zn, Ti, V, Cr, Mn, Fe, Co, Ni, Cu) or rare earth elements (e.g. Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb).
  • Suitable organometallic compounds are, for example, phthalocyanines or naphthalocyanines.
  • Suitable organic compounds are e.g. Cu H2Pc or porphyrins.
  • the structure of the document of value 1 enables a measurement 11 in remission geometry.
  • the luminescence marker 5 is excited, for example by irradiation with light, in particular infrared light.
  • the irradiation takes place in particular from a side 12 of the carrier element 2 facing away from the film element 4.
  • the luminescence marker 5 emits the luminescence radiation 6 due to the excitation.
  • the luminescence radiation 6 in turn propagates in the carrier element 2 and at least partially hits the selection layer 10. Only part of the spectrum is allowed to pass through the selection layer 10 unhindered, or it may even be that the entire spectral range of the luminescence radiation 6, preferably to different degrees regarding the intensity, is inhibited.
  • the luminescence radiation 6 which has penetrated the selection layer 10 or exits on the side of the selection layer 10 facing away from the carrier element 2 therefore has in particular a different spectral signature than before it entered the selection layer 10.
  • the luminescence radiation at least partially inhibited by the selection layer 10 or changed with regard to the spectral intensities, now hits the reflection layer 9.
  • the luminescence radiation 6 is reflected by the reflection layer 9 and at least partially passes through the selection layer 10 again.
  • the luminescence radiation 6 passes through the carrier element 2 and can then be detected on the side 12 of the carrier element 2 facing away from the film element 4.
  • a detector is arranged on the opposite side 12.
  • the reflected luminescence signal or the reflected luminescence radiation 6 is detected, not only reflected luminescence radiation is detected, but also a combined portion of directly emitted luminescence radiation.
  • the film element 4 is designed as a layered security element.
  • the security element is characterized in that it is difficult to reproduce without special manufacturing equipment and special manufacturing knowledge.
  • the film element is preferably designed as a hologram and / or security thread and / or security strip.
  • the film element 4 is arranged on a surface 13.
  • the reflective layer 9 and the selection layer 10 viewed perpendicular to the carrier element 2, are designed to overlap at least in some areas.
  • the reflective layer 9 and the selection layer 10 are designed to completely overlap.
  • the reflective layer 9 and the selection layer 10 are formed one above the other in precise register.
  • the reflection layer 9 has a reflection spectral region 14.
  • the selection layer 10 has a selection spectral range 15.
  • the reflection spectral region 14 has a broader band than the selection spectral region 15. This means that the reflection spectral region 14 or the reflection layer 9 reflects a larger wavelength range than the selection spectral region 15 or the selection layer 10 inhibits. This is advantageous because it enables broadband reflective metal layers to be used for the reflective layer, which can simultaneously provide other functions of the film element, such as a reflective hologram, for example.
  • Fig. 2 shows the document of value 1 analogously to FIG Fig. 1 , however, according to this exemplary embodiment, the luminescence marker 5 is arranged on the opposite side 12 of the carrier element 2.
  • the luminescence marker 5 can be printed on or applied to the carrier element 2 as a paint on the back.
  • the luminescent marker 5 can also be inserted into the carrier element 2, as shown in FIG Fig. 1 shown to be embedded.
  • Fig. 3 shows the document of value 1 also analogously to FIG Fig. 1 .
  • the film element 4 is embedded in the carrier element 2.
  • the film element 4 is incorporated into the carrier element during the production of the carrier element 2.
  • the film element 4 can only be surrounded by the carrier element 2 on one side or it can also be completely surrounded on all sides by the carrier element 2. This is the case in particular when the film element 4 is designed as a completely embedded security thread or only in some areas of a security thread that is partially embedded as a so-called window thread.
  • the luminescent marker 5 is according to the embodiment of FIG Fig. 3 arranged in the carrier element 2. However, it can also be the case that the luminescence marker 5 in the exemplary embodiment of FIG Fig. 3 only outside of the carrier element 2, for example as in FIG Fig. 2 shown, is arranged on the carrier element 2. Furthermore, it can also be that the luminescence marker is both embedded in the carrier element 2 and at the same time applied to an outside of the carrier element 2.
  • FIG. 11 shows a further exemplary embodiment of the document of value 1 analogously to FIG Fig. 1 .
  • the luminescence marker 5 is located on the surface 13 of the carrier element 2 between the film element 4 and the carrier element 2, the luminescence marker 5 can also be formed in the carrier element 2.
  • Fig. 5 shows an embodiment of a method for classifying the document of value 1. Shown is an excitation unit 17, which the luminescence marker 5 with excitation radiation 26, for example light, stimulates. The excited luminescence marker 5 emits the luminescence radiation 6 after the excitation process. According to the exemplary embodiment, the luminescence radiation 6 is emitted at least with the first wavelength 7 and the second wavelength 8.
  • At least part of the luminescence radiation 6 strikes the selection layer 10, which is optionally present during the process and is not shown in the figure, where it is at least partially spectrally inhibited, ie. H. Intensities of selected wavelengths of the luminescence radiation 6 are reduced or emerge with less strength from the selection layer 10 than before entering the selection layer 10.
  • the at least partially inhibited or with respect to the spectral intensities changed luminescence radiation 6 hits the reflective layer 9 and is thrown back from there to the selection layer 10, i.e. reflected, penetrates the selection layer 10 again, now also penetrates the carrier element 2 and is finally detected by a detection unit 18 outside the carrier element 2, on the opposite side 12 of the carrier element 2.
  • the detection unit 18 is designed, for example, as a spectrometer and / or has at least two detection units.
  • a first detection unit is preferably designed to detect the first wavelength 7 but not the second wavelength 8
  • a second detection unit is designed to detect the second wavelength 8 but not the first wavelength 7.
  • the detection area on the document of value 1 is smaller than the extent of the film element 4.
  • the first detection unit and the second detection unit preferably have essentially the same detection area.
  • Fig. 6 shows a schematic representation of an exemplary embodiment of the method in which an excitation radiation 26 for exciting the luminescence marker 5 is emitted in the direction of the carrier element 2.
  • the excitation radiation 26 preferably has only a single wavelength. After the excitation of the luminescence marker 5, the excitation radiation 26 continues to radiate with reduced intensity, in the exemplary embodiment penetrates the selection layer 10 and strikes the reflective layer 9. The excitation radiation 26 is emitted again from the reflective layer 9 through the selection layer 10 and strikes the luminescence marker 5 again, to stimulate it again with reduced intensity. After the renewed excitation, the excitation radiation 26 then leaves the carrier element 2 with a further reduced intensity on the side 12 facing away from the film element 4.
  • the first wavelength 7 of the luminescence radiation 6 is shown, which after the excitation is emitted by the luminescence marker 5, in particular in all spatial directions.
  • the luminescence radiation emitted at the first wavelength 7 in the direction of the film element penetrates the carrier element 2 and the selection layer 10 essentially uninhibited.
  • the first wavelength 7 is then reflected on the reflective layer 9 and again penetrates the selection layer 10 essentially uninhibited.
  • the first wavelength 7 also penetrates the carrier element 2 and can be detected on the side 12 facing away from the film element 4.
  • the first wavelength 7 is, however, emitted in an omnidirectional manner, which is why the first wavelength 7 exits the carrier element uninhibited on the opposite side 12 even without passing through the selection layer 10.
  • the second wavelength 8 is also shown, which is also emitted after the excitation by the luminescence marker 5, in particular in all spatial directions.
  • the luminescence radiation emitted at the second wavelength 8 in the direction of the film element penetrates the carrier element 2 uninhibited and strikes the selection layer 10.
  • the selection layer 10 is designed, according to the exemplary embodiment, to inhibit the second wavelength 8, ie the second wavelength 8 leaves the selection layer 10 weakened or with less intensity than before entering the selection layer 10.
  • the second wavelength 8 is also reflected back to the selection layer 10 and passes through the selection layer 10 again, the second wavelength 8 being further weakened when it passes through the selection layer 10 again will.
  • the second wavelength 8 then penetrates the carrier element 2 and leaves it on the opposite side 12.
  • the second wavelength 8 is also emitted, in particular, in an omnidirectional manner, which is why the second wavelength 8 emerges unchecked from the carrier element on the opposite side 12 even without passing through the selection layer 10.
  • Fig. 7 shows an embodiment of a document class-specific spectral signature 19. It can be seen that the spectral signature 19 has a dent 20.
  • the dent 20 arises, for example, at the point of the second wavelength 8.
  • the dent 20 arises from the fact that the selection layer 10 inhibits the intensity of the second wavelength 8.
  • a normal curve 22 and an absorption-free curve 23 are shown.
  • the normal curve 22 arises when the reflective layer 9 is not present and only the direct luminescence radiation of the luminescence marker 5 is detected, for example outside the sub-area 3.
  • the absorption-free curve 23 arises when the selection layer 10 is not present, and therefore the selective inhibition is omitted , but the reflective layer 9 is present, for example in the case of a counterfeit sheet element. The dent 20 is then not present in the latter case.
  • the wavelength is plotted in nm.
  • the signal strength is plotted on an ordinate 25 of the diagrams, for example in units of the photocurrent of a photodiode.
  • Fig. 8 shows an embodiment of a spectral signature 19.
  • the spectral signature 19 is formed by the selection spectral range 15, in particular the absorption spectral range or absorption spectrum, and a luminescence spectrum 27 or emission spectrum of the luminescence marker 5.
  • the luminescence spectrum 27 has two spectral bands. These spectral bands can be emitted, for example, by two different luminescent substances which together form the luminescent marker 5.
  • the luminescence spectrum 27 can be derived from the normal curve 22 Fig. 7 correspond.
  • Fig. 9 shows a further exemplary embodiment in a schematic representation of the spectral signature 19.
  • the spectral signature 19 is formed by the luminescence spectrum 27 and the narrow-band selection spectral range 15.
  • Fig. 10 shows a further embodiment in a schematic representation of the spectral signature 19.
  • the spectral signature 19 is formed by the luminescence spectrum 27 and the selection spectral range 15 designed as a low-pass filter.
  • Fig. 11 shows a further embodiment in a schematic representation of the spectral signature 19.
  • the spectral signature 19 is formed by the luminescence spectrum 27 and the selection spectral range 15 designed as a high-pass filter.
  • a document of value 1 is produced.
  • a carrier element 2 made of paper is provided over the entire surface with a luminescent marker 5, which consists of two There is luminescent substances, both of which can be excited at the same wavelength or the same excitation radiation 26, and the first luminescent substance emits luminescent radiation 6 at 1100 nm - corresponding to the first wavelength 7 - and the second luminescent substance emits luminescent radiation at 1600 nm - corresponding to the second wavelength 8 .
  • a security strip is additionally applied to this carrier element 2 on the front side 13 in a partial area 3 as a film element 4.
  • the security strip has a level 1 visual feature consisting of a microlens structure with an underlying printed white color layer.
  • the white colored layer also serves as a reflective layer 9.
  • the film element 4 has an IR absorber layer as a selection layer 10 underneath the white colored layer.
  • the IR absorber layer consists of a security printing ink with broadband varying absorption, which has an absolute absorption of approx. 50% at 1100 nm and an absolute absorption of only 10% at 1600 nm.
  • the structure of the value document corresponds to Fig. 1 , the spectral relationships of the Fig. 11 .
  • the value document 1 is manipulated, for example, by removing the foil element 4 and replacing it with a piece of aluminum foil for a simple counterfeiting.
  • the forged film element differs from the real film element 4 in particular in that it does not have a selection layer 10.
  • FIGS. 5 and 6 a sensor with remission geometry is used, which in particular has at least one excitation unit 17 and one detection unit 18.
  • the value document 1 is transported past the sensor by a transport device, the sensor taking at least one measurement of the luminescence radiation 6 in the sub-area 3 and at least one further measurement of the luminescence radiation 6 outside the sub-area 3.
  • the value document 1 is illuminated in each case with excitation radiation 26, which is set up to excite both luminescent substances of the luminescence marker 5 to emit luminescence.
  • the luminescence radiation 6 exiting on the rear side 12 of the document of value 1 is detected by the detection unit 18, a first detection unit only detecting the luminescence intensity at 1100 nm and a second detection unit only detecting the luminescence intensity at 1600 nm.
  • a broadband absorbing, for example black, surface is a broadband absorbing, for example black, surface.
  • the authenticity of the carrier element 2 is verified by the presence of the luminescence radiation 6 at the first wavelength 7, in particular 1100 nm, and at the second wavelength 8, in particular 1600 nm.
  • the recorded intensities of the luminescence radiation 6 at the first wavelength 7 and the second wavelength 8 are in particular in a fixed relationship that is characteristic of the luminescence marker 5 and that is determined or measured there during the measurement outside the sub-area 3 (luminescence spectrum 27 in Fig. 11 ). In the present embodiment, this ratio is preferably 1.0.
  • the measured luminescence intensities or intensities are significantly higher due to the influence of the reflective layer 9 of the film element 4.
  • the measured intensities at wavelengths 7 and 8 are increased by approx. 50% in the presence of a film element with a reflective layer 9.
  • the film element has the IR absorber layer 10, which is characteristic of a real film element 4, the measured intensity at the first wavelength 7, in particular 1100 nm, is, however, about 10% lower than at the second wavelength 8 due to the interaction with this selection layer, in particular 1600 nm, which is particularly characteristic of the spectral signature 19.
  • the authenticity of the film element 4 can therefore be checked on the basis of the measured ratio between the luminescence intensity at the first wavelength 7 and the luminescence intensity at the second wavelength 8.
  • the difference in the intensity ratios outside sub-area 3 and in sub-area 3 is used as a decision criterion. If the measured intensity ratio in sub-area 3 is, for example, more than 0.07 smaller than outside sub-area 3, the presence and authenticity of film element 4 is considered to be confirmed, otherwise the checked document of value 1 is rejected.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Security & Cryptography (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Credit Cards Or The Like (AREA)
EP20020273.7A 2020-06-10 2020-06-10 Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur Withdrawn EP3922476A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20020273.7A EP3922476A1 (fr) 2020-06-10 2020-06-10 Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur
US18/008,855 US20230226841A1 (en) 2020-06-10 2021-06-02 Valuable document having a substrate element and a foil element, and method for classifying a valuable document
PCT/EP2021/025198 WO2021249671A1 (fr) 2020-06-10 2021-06-02 Document de valeur doté d'un élément support et d'un élément film, et procédé de classification d'un document de valeur
EP21736243.3A EP4164893A1 (fr) 2020-06-10 2021-06-02 Document de valeur doté d'un élément support et d'un élément film, et procédé de classification d'un document de valeur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020273.7A EP3922476A1 (fr) 2020-06-10 2020-06-10 Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur

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EP3922476A1 true EP3922476A1 (fr) 2021-12-15

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EP20020273.7A Withdrawn EP3922476A1 (fr) 2020-06-10 2020-06-10 Document de valeur doté d'un substrat et d'un film, et procédé de classification d'un document de valeur
EP21736243.3A Pending EP4164893A1 (fr) 2020-06-10 2021-06-02 Document de valeur doté d'un élément support et d'un élément film, et procédé de classification d'un document de valeur

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EP21736243.3A Pending EP4164893A1 (fr) 2020-06-10 2021-06-02 Document de valeur doté d'un élément support et d'un élément film, et procédé de classification d'un document de valeur

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US (1) US20230226841A1 (fr)
EP (2) EP3922476A1 (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024012634A1 (fr) * 2022-07-14 2024-01-18 Giesecke+Devrient Currency Technology Gmbh Capteur et procédé de vérification de documents de valeur comprenant au moins un élément de sécurité réfléchissant
WO2024074174A1 (fr) * 2022-10-06 2024-04-11 Giesecke+Devrient Currency Technology Gmbh Élément de feuille de sécurité avec couche de sélection, procédé de production, procédé de test et support de données avec élément de feuille de sécurité

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5856048A (en) * 1992-07-27 1999-01-05 Dai Nippon Printing Co., Ltd. Information-recorded media and methods for reading the information
EP1935663A1 (fr) * 2006-12-18 2008-06-25 Setec Oy Support de données avec fenêtre de visualisation et son procédé de fabrication
JP2013199063A (ja) * 2012-03-26 2013-10-03 Dainippon Printing Co Ltd 情報記録媒体およびその読取方法
WO2020048640A1 (fr) * 2018-09-07 2020-03-12 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5856048A (en) * 1992-07-27 1999-01-05 Dai Nippon Printing Co., Ltd. Information-recorded media and methods for reading the information
EP1935663A1 (fr) * 2006-12-18 2008-06-25 Setec Oy Support de données avec fenêtre de visualisation et son procédé de fabrication
JP2013199063A (ja) * 2012-03-26 2013-10-03 Dainippon Printing Co Ltd 情報記録媒体およびその読取方法
WO2020048640A1 (fr) * 2018-09-07 2020-03-12 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024012634A1 (fr) * 2022-07-14 2024-01-18 Giesecke+Devrient Currency Technology Gmbh Capteur et procédé de vérification de documents de valeur comprenant au moins un élément de sécurité réfléchissant
WO2024074174A1 (fr) * 2022-10-06 2024-04-11 Giesecke+Devrient Currency Technology Gmbh Élément de feuille de sécurité avec couche de sélection, procédé de production, procédé de test et support de données avec élément de feuille de sécurité
DE102022125865A1 (de) 2022-10-06 2024-04-11 Giesecke+Devrient Currency Technology Gmbh Foliensicherheitselement mit Selektionsschicht, Herstellungsverfahren, Prüfverfahren und Datenträger mit Foliensicherheitselement

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EP4164893A1 (fr) 2023-04-19
WO2021249671A1 (fr) 2021-12-16
US20230226841A1 (en) 2023-07-20

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