EP4443403A1 - Procédé de vérification d'un document de sécurité - Google Patents

Procédé de vérification d'un document de sécurité Download PDF

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Publication number
EP4443403A1
EP4443403A1 EP24168311.9A EP24168311A EP4443403A1 EP 4443403 A1 EP4443403 A1 EP 4443403A1 EP 24168311 A EP24168311 A EP 24168311A EP 4443403 A1 EP4443403 A1 EP 4443403A1
Authority
EP
European Patent Office
Prior art keywords
microstructures
security document
security
image
laser
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.)
Pending
Application number
EP24168311.9A
Other languages
German (de)
English (en)
Inventor
Dr. Ulrich BIELESCH
Dr. Ralf GRIESER
Andreas Bosien
Kathrin KLÜNDER
Kai Rossek
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
Publication of EP4443403A1 publication Critical patent/EP4443403A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • G07D7/181—Testing mechanical properties or condition, e.g. wear or tear
    • G07D7/185—Detecting holes or pores
    • 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

Definitions

  • the invention relates to a method for checking a security document.
  • security documents examples include passports, identity cards, driving licenses or other personal identification documents. They are usually provided with one or more security elements that serve to protect the security document from forgery.
  • a method for producing a printed image on a data carrier from data of a digitized image comprises the following steps: providing a data carrier, printing the digitized image and providing a control mark on the data carrier, reading the printed image and calculating the image-specific results from the printed image and/or calculating the image-specific results from the data of the digitized image, determining the positions of the image-specific results in relation to the control mark, storing the image-specific results and their positions as a data code on the data carrier and optionally coding the printed image with the image-specific results in a detectable form. It can be provided here that the printed image is produced with a contour image that is only visible under UV irradiation.
  • document DE 10 2018 106 430 B4 relates to a security document with a number of layers, wherein the following is provided: at least one layer has a security element with a structure formed with structural elements with dimensions of less than 200 micrometers; the structural elements are designed as holes in such a way that when viewed perpendicular to the surface the security element is not visible and information underneath remains recognizable, and when viewed at an acute angle the structure is visible as a frosted surface and, when light falls at an angle, shows the effect of an optical grating in that the spectral colors of the incident light become visible; and the structure comprises individualizing information about a holder of the security document.
  • the object of the invention is to provide an improved method for checking a security document in conjunction with a security document.
  • a method for checking a security document comprises the following: providing a security document with a stack of layers, one of the layers having a first security element with a structure that is formed with laser-assisted microstructures and, by incorporating the microstructures, comprises individualizing information about a person to whom the security document is assigned; and checking the security document using the first security element, the structure being made visible by means of UV illumination of the microstructures of the structure.
  • the microstructures created by laser processing i.e. laser-assisted, in a layer of the security document can be made visible by means of UV lighting due to the UV luminescence induced thereby. While the microstructures are barely or not at all visible to the naked eye, which hinders an inspection of the security document using this security element with the microstructures, the UV lighting makes it possible to make the structure of the security element with the microstructures and thus the individualizing information about the holder of the security document visible for the inspection process, whether for viewing with the naked eye or a detection device. In this way, an improved and more efficient inspection of the security document is possible, which has the security element with the structure formed with the laser-generated microstructures.
  • the microstructures can be formed with laser-assisted micro-drillings, and when checking the security document, the micro-drillings of the structure can be UV-illuminated and thus made visible.
  • the laser-assisted micro-drillings can in particular be designed as blind holes that only extend over a portion of the layer thickness of the layer in which the micro-drillings are created.
  • the microstructures can be formed with laser-assisted micro-perforations, and when checking the security document, the micro-perforations in the layer can be UV-illuminated and thus made visible.
  • the micro-bores extend over the entire layer thickness of at least one layer of the layer stack that has the first security feature, and it can be provided that the microstructure extends into an underlying layer (there is a blind hole). In this embodiment, a combination of perforation and micro-bore is then provided.
  • the laser-assisted microstructures can be produced using ultrashort laser pulses.
  • the ultrashort laser pulses used can, for example, have a pulse duration of less than 10 ps, alternatively less than 1 ps or, further alternatively, less than 500 fs. This supports precise manufacturing and efficient generation of the microstructures for the security element in the layer(s). Undesirable thermal or mechanical damage to the layer material can thus be minimized or avoided when producing the microstructures.
  • the laser-assisted microstructures can have dimensions of less than 200 micrometers.
  • the individual microstructures can have a length and/or a width and/or a depth or a height and/or a distance between adjacent microstructures of less than 200 micrometers, for example about 100 nm to about 50 micrometers.
  • dimensions in relation to the length and/or width and/or the distance of at least about 1 micrometer and depths of at least about 0.5 or about 1 micrometer can be provided.
  • the dimensions in relation to the length and/or width and/or the distance can, for example, be at most about 20 micrometers.
  • the structure with the microstructures made visible by means of UV illumination can be detected by means of a detection device which, in response to the detection, provides measurement signals which can be evaluated by an evaluation device to determine the individualizing information about the person (owner).
  • the luminescence in the area of the microstructures indicated by means of UV illumination can be detected using an optical detection device, for example a camera device.
  • a time- and/or frequency-resolved detection of the luminescence can be provided.
  • digital image data can be generated which can display the entirety of the microstructures of the structure of the security element.
  • Image data processing can be used to check whether the image data recorded contains an expected (test) structure. show how the authenticity of the security document can be determined using the evaluation device.
  • the captured image data can be evaluated to determine whether the structure with the microstructures corresponds to a predetermined contour (comparison contour), for example an external image contour.
  • a predetermined contour for example an external image contour. This can be, for example, a passport or portrait photo of the holder of the security document.
  • the laser-assisted microstructures of the structure can, when viewed in the direction of the security document, at least partially overlap with an image element of a second security element, wherein the image element of the second security element is (also) made visible by means of UV illumination in order to check the security document.
  • the structure with the microstructures of the first security element on the one hand and the second security element on the other hand overlap at least partially, whereby a combined security element can be provided.
  • the image element of the second security element can be a print image which is at least partially printed using UV ink in the stack of layers of the security document. Both the structure with the microstructures of the first security element and the image element of the second security element are then made visible by means of UV illumination and can be used and evaluated to check the security document.
  • an image contour can be made visible by means of UV lighting, for example an outer image contour.
  • the image element can thus be printed at least along the image contour of the image element, for example using an ink that is visible under UV lighting.
  • the image contour can be printed by printing on a layer on which the image element is also printed, or alternatively on an overlying layer of the security document, wherein the image contour overlaps with the image element on the underlying layer. It can be provided to print only the image contour with the ink that is visible under UV light, wherein other image areas, in particular within the image contour, are visible without UV lighting, in particular for checking the security document.
  • other image areas, in particular within the image contour can only be visible under UV lighting, for example the image element as a whole.
  • the image element of the second security element in the stack of layers can be arranged below the microstructures when looking from above at the security document.
  • the image element and the microstructures can be formed in different or the same layer of the layer stack.
  • the image element of the second security element can be formed in a print layer that is part of the stack of layers.
  • the microstructures can overlap with the, for example, printed image element along an image contour of the image element.
  • the image element of the second security element can be, for example, a portrait image of the person to whom the security document is assigned.
  • the portrait image is part of personalization information arranged on the security document.
  • the microstructures can be produced continuously along the image contour of the image element or only in partial areas.
  • the microstructures can be designed to partially or completely cover the image element within the image contour. In the case of the portrait image or other image elements, the microstructures can be produced at least along an outer contour of the image element.
  • the overlapping image contour and microstructures can both be made visible under UV light for document inspection.
  • the microstructures of the structure of the first security element and the image element of the second security element can be made visible simultaneously by means of UV illumination.
  • one or more further security elements can be provided, for which the configurations explained in connection with the second security element can be provided accordingly.
  • the structure of the first security element can have a first arrangement of laser-assisted microstructures and a second arrangement of laser-assisted microstructures, which are formed in the layer separately from the first arrangement, in particular such that the two arrangements are not designed to overlap each other.
  • Several arrangements of laser-assisted microstructures, which are formed separately from each other can, for example, be assigned to different areas of the image element of the second security element, which are thus separated and can be highlighted in different ways as required. For example, differences between areas of the image element can be highlighted using the respective arrangement of microstructures, for example for better visibility.
  • microstructures for example in the form of micro-drilling or micro-perforation, can be designed in such a way that, in particular under normal or daylight conditions and/or illumination with light in the visible range such as white light, they are not visible when viewed perpendicular to the surface of the security document and information lying in the stack of layers below remains recognizable, and when viewed at an acute angle, the structure with the microstructures is visible as a frosted surface and, when the light falls at an angle, shows the effect of an optical grating in that the spectral colors of the incident light become visible.
  • the layers of the security document are formed, for example, by means of film layers that are laminated on top of each other, as is known for security documents.
  • FIG. 1 shows a known arrangement for checking a security document 1, wherein a section or partial portion 2 of the security document 1 is shown.
  • a document body 3 of the security document 1 has a layer structure 4 with a stack of several layers 5, 6, 7.
  • a contour 13 printed with invisible ink is arranged above the color print 9, for example directly on the color print 9 or an overlying film layer 6, 7, which in the example shown has separate printed sections or areas and follows characteristic elements of the underlying portrait (color print 9), for example the circular shape of the pupil or the arch of the eyebrow.
  • This ink which is not visible under normal lighting, i.e. in particular under daylight or white light lighting, luminesces when illuminated with UV light 14 and, like the printed contour 13, becomes visible to the viewer 11 under the UV light 14. This enables the formation of the printed contour 13 with UV ink, which therefore becomes visible under UV lighting.
  • the color print 9 with the portrait or passport photo and the contour 13 printed with invisible ink each form a security feature for the security document 1, which are produced in the layer structure 4.
  • a security document 20 in accordance with Fig. 3 a security element 21 with a structure 22 is provided which is designed with laser-assisted microstructures 23.
  • the microstructures 23 are designed as micro-bores, for example blind bores, and/or micro-openings which extend through at least one of the multiple layers 5, 6, 7.
  • the arrangement of microstructures 23 introduced into the upper layer 7 overlaps precisely with the underlying printed contour 13, which can be made visible in particular by means of UV exposure 14.
  • the microstructures 23 have a UV-luminescent property, which is why, for an inspection of the security document 20, in the example shown, they can then be made visible together with the underlying printed contour 13 by means of the UV illumination 14.
  • the microstructures 23 can be designed in such a way that they are not visible when viewed perpendicular to the surface of the security document 20 and information that lies underneath in the stack of layers 5, 6, 7, for example the color print 9 with the portrait or passport photo, remains recognizable, and when viewed at an acute angle the structure 22 with the microstructures 23 is visible as a matte surface and, when the light falls at an angle, shows the effect of an optical grating in that the spectral colors of incident light become visible.
  • the laser-assisted microstructures 23 can have dimensions of less than 200 micrometers.
  • the individual microstructures 23 can have a length and/or a width and/or a depth or a height and/or a distance between adjacent microstructures 23 of less than 200 micrometers, for example approximately 100 nm to approximately 50 micrometers.
  • dimensions in relation to the length and/or width and/or the distance of at least approximately 1 micrometer and depths of at least approximately 0.5 or approximately 1 micrometer can be provided.
  • the dimensions in relation to the length and/or width and/or the distance can, for example, be at most approximately 20 micrometers.
  • Ultrashort laser pulses can be used to produce the laser-assisted microstructures 23.
  • the ultrashort laser pulses used can, for example, have a pulse duration of less than 10 ps, alternatively less than 1 ps or, further alternatively, less than 500 fs. This supports precise manufacturing and efficient production of the microstructures 23 for the security element 20 in the layer(s). Undesirable thermal or mechanical damage to the layer material can thus be minimized or avoided when producing the microstructures 23.
  • the microstructures 23 have a first and a second arrangement of microstructures 23a, 23b, which are formed separately from one another.
  • the arrangements of microstructures 23a, 23b overlap, when looking from above at the security document 20, with a respective associated section of the printed contour 13.
  • the different sections of the printed contour 13, which in turn overlap with sections of the color print 9, i.e. the portrait image, can be emphasized or highlighted differently by means of the different arrangements of microstructures 23a, 23b for the inspection of the security document 20.
  • the microstructures 23 of the structure 22 have luminescent properties and are visible under the influence of the UV illumination 14, like the contour 13 printed using invisible ink (UV ink).
  • the various security features which are formed by means of the color print 9, the printed contour 13 and the structure 22 with the microstructures 23, are visible in different ways when the security document 20 is viewed differently, in particular they are visible or not recognizable.
  • the color print 9 with the portrait image is When viewed perpendicular to the surface of the security document 20, the printed contour 13 and the microstructures 23 are not visible.
  • the printed contour 13 and the microstructures 23 are visible.
  • the microstructures 23 are visible as a matt surface, whereas the printed contour 13 is not visible.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Security & Cryptography (AREA)
  • Credit Cards Or The Like (AREA)
EP24168311.9A 2023-04-05 2024-04-03 Procédé de vérification d'un document de sécurité Pending EP4443403A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102023108753.3A DE102023108753B3 (de) 2023-04-05 2023-04-05 Verfahren zum Prüfen eines Sicherheitsdokuments

Publications (1)

Publication Number Publication Date
EP4443403A1 true EP4443403A1 (fr) 2024-10-09

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EP24168311.9A Pending EP4443403A1 (fr) 2023-04-05 2024-04-03 Procédé de vérification d'un document de sécurité

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EP (1) EP4443403A1 (fr)
DE (1) DE102023108753B3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2584552A (en) * 2017-10-19 2020-12-09 De La Rue Int Ltd Security devices, security articles, security documents and methods for their manufacture
DE102019126674A1 (de) * 2019-10-02 2021-04-08 Bundesdruckerei Gmbh Personalisierung einer Mehrzahl von Sicherheitselementen
DE102018106430B4 (de) 2018-03-20 2021-08-12 Bundesdruckerei Gmbh Sicherheitselement mit Mikro- oder Nanostrukturierung
DE102020133826A1 (de) 2020-12-16 2022-06-23 Bundesdruckerei Gmbh Verfahren zur Herstellung eines gedruckten Bildes auf einem Datenträger für ein Sicherheits- oder Wertdokument

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007024298B3 (de) 2007-05-23 2008-10-16 Zahedi Fariborz Martin Loessl Folienelement zur Echtheitserkennung, Sicherheitspapier, Sicherheitsdokument, Wertdokument, Münze, Jeton, Gebrauchsgegenstand, Gestaltungselement sowie Verfahren zur Herstellung eines Folienelements zur Echtheitserkennung und Verfahren zur Herstellung eines Sicherheitspapiers, eines Sicherheitsdokuments und eines Wertdokuments wie einer Banknote
DE102019113005A1 (de) 2019-05-16 2020-11-19 Bundesdruckerei Gmbh Lumineszierendes Sicherheitselement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2584552A (en) * 2017-10-19 2020-12-09 De La Rue Int Ltd Security devices, security articles, security documents and methods for their manufacture
DE102018106430B4 (de) 2018-03-20 2021-08-12 Bundesdruckerei Gmbh Sicherheitselement mit Mikro- oder Nanostrukturierung
DE102019126674A1 (de) * 2019-10-02 2021-04-08 Bundesdruckerei Gmbh Personalisierung einer Mehrzahl von Sicherheitselementen
DE102020133826A1 (de) 2020-12-16 2022-06-23 Bundesdruckerei Gmbh Verfahren zur Herstellung eines gedruckten Bildes auf einem Datenträger für ein Sicherheits- oder Wertdokument

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