EP1673738A1 - Systeme de codage pour documents de valeur - Google Patents

Systeme de codage pour documents de valeur

Info

Publication number
EP1673738A1
EP1673738A1 EP04790134A EP04790134A EP1673738A1 EP 1673738 A1 EP1673738 A1 EP 1673738A1 EP 04790134 A EP04790134 A EP 04790134A EP 04790134 A EP04790134 A EP 04790134A EP 1673738 A1 EP1673738 A1 EP 1673738A1
Authority
EP
European Patent Office
Prior art keywords
coding system
luminescent
coding
approximately
additives
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Withdrawn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
EP04790134A
Other languages
German (de)
English (en)
Inventor
Thomas Giering
Gerhard Schwenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1673738A1 publication Critical patent/EP1673738A1/fr
Withdrawn legal-status Critical Current

Links

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
    • G07D7/06—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

Definitions

  • the invention relates to a coding system for objects to be secured.
  • the invention is based on the abe to propose a coding system that combines high security against forgery with a large number of coding possibilities.
  • the coding system has a luminescent base material and at least one luminescent additive, the possible codes of the coding system being formed by the presence or absence of a luminescent additive and / or the type of additives and / or the number of additives.
  • the invention is based on the idea that the security aspect through the lumi- nescent base material can be guaranteed, while the large number of possible additives provides a large number of codes.
  • the base substance can only be identified by user groups that place the highest demands on the authenticity check, such as central banks.
  • the additive can preferably also be identified by a user group that carries out a lower-value security check, such as local public transport companies, department stores etc., and would like to identify the additive with simpler and cheaper detection devices.
  • the luminescent base material and the luminescent additives each have coding-relevant emission lines which lie in a common emission range. All coding-relevant emission lines are preferably outside the visible spectral range in order to make it more difficult to detect the emission. It has proven to be particularly advantageous if all coding-relevant emission lines are in the spectral range from 750 nm to approximately 2500 nm, preferably in the spectral range from approximately 800 nm to approximately 2200 nm, particularly preferably in the spectral range from approximately 1000 nm to approximately 1700 nm. If a coding-relevant emission line lies in the range above approximately 1000 nm, it is removed from the comparatively simple detection by commercially available infrared detectors based on silicon.
  • the coding system preferably contains at least two luminescent additives whose coding-relevant emission lines do not overlap or spectrally overlap with the coding-relevant emission lines of the base substance are so far from the coding-relevant emission lines of the base material that they can be easily distinguished by measurement technology.
  • the luminescent base material and / or at least one of the luminescent additives is preferably a luminescent substance based on a doped host lattice. These luminescent substances can e.g. are excited by directly irradiating into the absorption bands of the luminescent ions and then emitting them. In preferred variants, absorbing host gratings and so-called “sensitizers” can also be used, which absorb the excitation radiation and transmit it to the luminescent ion, which then emits itself with its characteristic wavelengths. It is understood that the host gratings and / or the dopants differ in each case can be in order to receive different excitation and / or emission ranges for the luminescent substances.
  • the host lattice absorbs up to approximately 1.1 ⁇ m in the visible spectral range and optionally also in the near infrared range.
  • the excitation can then take place via light sources, such as halogen lamps, flash lamps, LEDs, lasers or xenon arc lamps, with high effectiveness, so that only small amounts of the luminescent substance are required.
  • the small amount of substance makes it difficult to prove the substance used for potential counterfeiters. If the host lattice absorbs in the near infrared up to about 1100 nm, easily detectable emission lines of the dopant ions can be suppressed, so that only the more complex emission to be detected remains at longer wavelengths.
  • luminescent substances are used which absorb even in the visible spectral range, preferably over the largest part of the visible spectral range, particularly preferably into the near infrared range. Even then, emissions in these more accessible spectral ranges are suppressed.
  • the luminescent base material and / or at least one of the luminescent additives is formed on the basis of a host lattice doped with rare earth elements. Neodymium, erbium, holmium, thulium, ytterbium, praseodymium, dysprosium or a combination of these elements are particularly suitable as dopants.
  • the luminescent base material and / or at least one of the luminescent additives is formed on the basis of a host lattice doped with a chromophore, the chromophore from the group scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc is selected.
  • a host lattice doped with a chromophore the chromophore from the group scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc is selected.
  • the dopants and host lattices mentioned in WO 02/070279 are also suitable for use as luminescent substances and in particular for use as luminescent base materials.
  • At least one of the host lattices can be doped with several chromophores.
  • the two variants can be combined, that is to say that one or some of the luminescent substances are formed on the basis of a rare earth-doped host lattice and other luminescent substances are based on a host lattice with a chromophore.
  • the host lattice can have a perovskite structure or a garnet structure, for example. At least one of the host lattices can also be formed by a mixed crystal. Further possible configurations of the Host lattice and the dopants are in EP-B-0 052 624 or
  • EP-B-0 053 124 listed, the disclosures of which in this respect
  • a first and a second luminescent additive are provided in the coding system, which form a pair of luminescent substances assigned to one another.
  • the emission spectra of the first and second additive overlap in at least a partial area of the common emission area such that the emission spectrum of the first additive is supplemented by the emission spectrum of the second additive.
  • the first and second additives are in particular formed by a doped host lattice of the type described above.
  • the first and the second additive are formed on the basis of different host lattices which have a differently strong crystal field and which are each doped with the same dopant. Due to the influence of the crystal field at the location of the dopant, its electronic levels are shifted compared to the undisturbed state. Since the size of the shift varies for the different levels, there are shifts in the energetic intervals of the electronic levels and thus also in the position of the emission lines, depending on the strength and symmetry of the crystal field. If the same dopant is selected for the first and second additive, then by suitable selection of host lattices with differently strong crystal fields, controlled small ne shifts of the associated emission lines with respect to the undisturbed emission can be set.
  • Said sub-area, in which the luminescence spectra of the first and second additives additionally overlap, preferably has a width of 200 nm or less, preferably 100 nm or less. In a preferred embodiment, the partial range extends from approximately 850 nm to approximately 970 nm.
  • the partial range extends from approximately 920 nm to approximately 1060 nm, or from approximately 1040 nm to approximately 1140 nm, or from approximately 1100 nm to approximately 1400 nm, preferably from approximately 1100 nm to approximately 1250 nm, particularly preferably from approximately 1120 nm to approximately 1220 nm, or from approximately 1300 nm to approximately 1500 nm, or from approximately 1400 nm to approximately 1700 nm
  • the first and the second additive each advantageously have at least one emission line in the sub-area mentioned, the positions of which are at a distance of approximately 50 nm or less, preferably approximately 30 nm or less, particularly preferably approximately 20 nm or less, very particularly preferably of about 10 nm or less.
  • the emission lines are narrow-band and in particular have a half width of about 50 nm or less, preferably about 30 nm or less, particularly preferably about 20 nm or less, very particularly preferably about 10 nm or less.
  • the coding system can also have several pairs of additive assigned to one another, which can each be formed as described.
  • the pairs of additives are preferably matched to one another so that the Subareas in which the emission spectra of the two additives additionally overlap are different for different pairs. It is also possible to provide further luminescent substances which likewise emit in one of the partial regions of the spectrum mentioned and preferably further supplement the emission spectrum of the pair of additives.
  • a large number of additive pairs or additive mixtures can be generated, the coding-relevant emission lines of which additionally overlap in different spectral subregions.
  • very compact codings can be formed which, with a high density of information, take up little space on the object to be protected.
  • the coding-relevant emission line of the luminescent base material is preferably in the infrared spectral range above 1100 nm.
  • infrared spectral range means the wavelength range from 750 nm and larger, preferably 800 nm and larger.
  • luminescent base materials can also be used be provided in the coding system so that, for example, different user groups can use different basic substances for the authenticity check.
  • Objects to be secured include, in particular, value documents, such as banknotes, shares, bonds, certificates, vouchers, checks, high-quality admission cards, credit cards, identity cards, passports and other identification documents, as well as security papers for the production of such value documents.
  • the coding system is suitable for securing documents of value, such as banknotes.
  • At least one of the luminescent substances can be printed on the value document.
  • Several of the luminescent substances for example a pair of luminescent substances assigned to one another, can also be printed together in one printing ink on the value document.
  • the printing inks used for this can be transparent or contain additional color pigments which must not impair the detection of the luminescent substances. They preferably have transparent areas in the excitation and in the considered emission area of the luminescent substances.
  • the document of value preferably comprises a substrate which is formed by a printed or unprinted cotton fiber paper, a cotton / synthetic fiber paper, a cellulose-containing paper or a coated, printed or unprinted plastic film.
  • a laminated multilayer substrate can also be used.
  • One or more of the luminescent substances can also be introduced into the volume of the value document, in particular the value document substrate.
  • the luminescent substances can be introduced into the volume of a paper substrate, for example, by a method as described in the documents EP-A 0 659935 and DE 101 20 818. To this extent, the disclosures of the cited documents are included in the present application.
  • the luminescent substances can also be added to the paper pulp by chance before the sheet is formed.
  • FIG. 1 shows a schematic illustration of various secured objects, each with a coding according to an exemplary embodiment of the coding system according to the invention
  • FIG. 2 shows schematic emission profiles of a luminescent base substance and three lucescent additives, as can be used for the coding system of FIG. 1,
  • Fig. 3 is a schematic representation of a secured object, which is provided with a coding according to another embodiment of the coding system according to the invention.
  • FIG. 4 shows schematic emission profiles of a luminescent base material and various luminescent additives, as can be used for the coding system of FIG. 3.
  • FIG. 1 shows three secured objects 10, 20 and 30, each of which is provided with a coding 12, 22 or 32 of a coding system according to the invention.
  • the base material can be formed, for example, by a luminescent substance according to WO 02/070279. As shown in the right-hand part of FIG. 2, its coding-relevant emission line 40 in the exemplary embodiment is approximately 1200 nm. No high demands are made on the additives with regard to imitability, it can be any substances that luminesce in the specified spectral range.
  • the luminescent additives 16, 26 and 36 are formed on the basis of neodymium-doped host lattices and, as shown in the left part of FIG. 2, have emission lines 42, 44 and 46 relevant for coding in the region around 1064 nm.
  • the additives 16, 26 and 36 are formed on the basis of different host lattices, which generate a crystal field of different strength at the location of the neodymium ion. As explained above, the interaction between the crystal field and the neodymions results in emission lines which are shifted slightly from the undisturbed value and make the emissions of the additives distinguishable from one another.
  • the peak position of the emission line 42 of the first additive 16 is at a wavelength of approximately 1065 nm
  • the peak position of the emission line 44 of the second additive 26 is approximately 1080 nm
  • the peak position of the emission line 46 of the third additive 36 is approximately 1090 nm.
  • the codings 12, 22 and 32 allow both a high-quality authenticity check and a differentiation between the different secured objects on the basis of the coded information.
  • Each of the codes 12, 22 and 32 contains the base substance 14, which is difficult to imitate, and one of the three additives 16, 26 and 36. If the base substance 14 is detected by its characteristic luminescence emission 40 when a code is read out, the respective code can be classified as genuine. The un- A distinction is then made between the various objects on the basis of the respectively proven additive 16, 26 or 36. Since the authenticity of the coding is already guaranteed by the base substance 14, the adjustability of the additives is of subordinate importance in this exemplary embodiment.
  • the objects to be secured can, for example, be banknotes, the authenticity of which is checked with the aid of the luminescent base material.
  • the different luminescent additives can represent different denominations of the banknotes.
  • the base substance and additive are expediently distributed uniformly in the volume of the banknote substrate in order to make it possible to recognize a transfer of a coding to a banknote of another denomination.
  • an object 50 to be secured is provided with a coding 51 according to another coding system according to the invention.
  • 5 contains, in addition to the above-described, difficult to imitate luminescent base material 14, two pairs of associated luminescent additives 52, 53 and 54, 55, which after excitation show emissions in the infrared spectral range between 1000 and 1500 nm, and their Emission spectra additionally overlap in pairs in a respective sub-region of this spectral range, as described in more detail below.
  • any information for example a product code or the serial number of a banknote, can be provided by the Represent coding 51.
  • the coding shown in FIG. 3 can be used, for example, to represent a ternary code in which the state “0” is represented by a region without additives, the state “1” by a region with the first pair of additives 52, 53 and the state “2” an area is represented with the second additive pair 54, 55. Detection of the coding 51 shown in FIG. 3 with a suitable detector would therefore recognize the ternary coding “1201”.
  • the additives 52 and 53 are formed on the basis of neodymium-doped host lattices with different crystal fields. As can be seen in the left part of FIG. 4, the coding-relevant emission lines 62, 63 of the two additives 52, 53 overlap each other in the partial range from approximately 1000 nm to approximately 1150 nm in such a way that the emission spectrum 62 of the first additive 52 is caused by the emission spectrum 63 of the second additive 63 is added. Due to the small distance between the two lines, the presence of the two additives 52 and 53 can practically not be recognized without prior knowledge of the substances used from the enveloping emission curve.
  • the right-hand part of FIG. 4 shows the emission profile 64 and 65 of the additives 54 and 55 of the second additive pair in the relevant region around 1250 nm.
  • the additives 54, 55 are each formed on the basis of a host lattice doped with a chromophore , the chromophore being selected from the group consisting of scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc.
  • the envelope of the luminescent emissions of the two additives 54, 55 cannot be inferred from the type of luminescent substances used without further information.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Luminescent Compositions (AREA)
  • Credit Cards Or The Like (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

La présente invention concerne un système de codage comprenant une substance luminescente de base et au moins une substance luminescente d'addition, les codages possibles du système de codage étant formés par la présence ou l'absence d'une substance luminescente d'addition et/ou le type des substances d'addition et/ou le nombre de substances d'addition.
EP04790134A 2003-10-08 2004-10-05 Systeme de codage pour documents de valeur Withdrawn EP1673738A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10346685A DE10346685A1 (de) 2003-10-08 2003-10-08 Codiersystem für Wertdokumente
PCT/EP2004/011131 WO2005036478A1 (fr) 2003-10-08 2004-10-05 Systeme de codage pour documents de valeur

Publications (1)

Publication Number Publication Date
EP1673738A1 true EP1673738A1 (fr) 2006-06-28

Family

ID=34399354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04790134A Withdrawn EP1673738A1 (fr) 2003-10-08 2004-10-05 Systeme de codage pour documents de valeur

Country Status (8)

Country Link
US (1) US7790056B2 (fr)
EP (1) EP1673738A1 (fr)
CN (1) CN100557644C (fr)
DE (1) DE10346685A1 (fr)
MA (1) MA28137A1 (fr)
RU (1) RU2376640C2 (fr)
TN (1) TNSN06099A1 (fr)
WO (1) WO2005036478A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005033598A1 (de) * 2005-07-19 2007-01-25 Giesecke & Devrient Gmbh Wertdokument, Herstellung und Prüfung von Wertdokumenten
DE102006047851A1 (de) 2006-10-10 2008-04-17 Giesecke & Devrient Gmbh Echtheitsmerkmal in Form von lumineszierenden Substanzen
DE102006047852A1 (de) * 2006-10-10 2008-04-17 Giesecke & Devrient Gmbh Echtheitsmerkmal in Form einer lumineszierenden Substanz
DE102009058669A1 (de) * 2009-12-16 2011-06-22 Giesecke & Devrient GmbH, 81677 Echtheitsmerkmal in Form von lumineszierenden Substanzen
US20130048874A1 (en) 2011-08-31 2013-02-28 Honeywell International Inc. Articles with confounded emission characteristics and methods and apparatus for their authentication
DE102017127923A1 (de) 2017-11-27 2019-06-13 Bundesdruckerei Gmbh Codierungssystem zum Ausbilden eines Sicherheitsmerkmals in oder an einem Sicherheits- oder Wertdokument oder einer Mehrzahl von Sicherheits- oder Wertdokumenten
DE102018129365A1 (de) 2018-11-21 2020-05-28 Bundesdruckerei Gmbh Codierungssystem zum Ausbilden eines Sicherheitsmerkmals in oder an einem Sicherheits- oder Wertdokument oder einer Mehrzahl von Sicherheits- oder Wertdokumenten
FR3139029A1 (fr) 2022-08-25 2024-03-01 Oberthur Fiduciaire Sas Procédé d’authentification ou d’identification d’un document de sécurité

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6603007A (fr) * 1965-03-08 1966-09-09
US4013490A (en) * 1973-03-27 1977-03-22 Westinghouse Electric Corporation Phosphor identification method, particularly adapted for use with explosives, for providing a distinctive information label
DE3020652A1 (de) 1980-05-30 1981-12-10 GAO Gesellschaft für Automation und Organisation mbH, 8000 München Wertpapier mit echtheitsmerkmalen in form von lumineszierenden substanzen und verfahren zur aenderung derselben
WO1981003510A1 (fr) * 1980-05-30 1981-12-10 Gao Ges Automation Org Papier-valeur avec marque d'authenticite en matiere luminescente uniquement dans une region invisible du spectre optique et procede pour sa verification
IT1193733B (it) 1980-05-30 1988-08-24 Gao Ges Automation Org Carta valori dotata di segni di autenticita sotto forma di sostanze luminescenti procedimento per il controllo della carta valori stessa ed apparecchio per l attuazione di tale procedimento
DE4344552A1 (de) 1993-12-24 1995-06-29 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zur Ausstattung von Wertpapieren mit Echtheitsmerkmalen
US6380547B1 (en) * 1998-06-09 2002-04-30 Manuel E. Gonzalez Tagging compositions and methods
DE19962790A1 (de) 1999-12-23 2001-06-28 Giesecke & Devrient Gmbh Sicherheitspapier mit aufgebrachter Codierung aus lumineszierenden Melierfasern
FR2813134B1 (fr) * 2000-08-21 2004-01-16 Banque De France Procede d'authentification de documents sensibles
DE10111116A1 (de) * 2001-03-08 2002-09-19 Giesecke & Devrient Gmbh Wertdokument
DE10120818A1 (de) 2001-04-27 2002-10-31 Giesecke & Devrient Gmbh Verfahren und Vorrichtung zum Einbringen von Merkmalsstoffen in eine Papierbahn

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005036478A1 *

Also Published As

Publication number Publication date
WO2005036478A1 (fr) 2005-04-21
TNSN06099A1 (en) 2007-11-15
RU2376640C2 (ru) 2009-12-20
CN100557644C (zh) 2009-11-04
CN1867945A (zh) 2006-11-22
RU2006115171A (ru) 2008-02-10
DE10346685A1 (de) 2005-05-04
US7790056B2 (en) 2010-09-07
MA28137A1 (fr) 2006-09-01
US20070057072A1 (en) 2007-03-15

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