EP2435993B1 - Microsystème pour reconnaître des caractéristiques prédéfinies de papiers de valeur, de documents de sécurité ou d'autres produits - Google Patents

Microsystème pour reconnaître des caractéristiques prédéfinies de papiers de valeur, de documents de sécurité ou d'autres produits Download PDF

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Publication number
EP2435993B1
EP2435993B1 EP10726923.5A EP10726923A EP2435993B1 EP 2435993 B1 EP2435993 B1 EP 2435993B1 EP 10726923 A EP10726923 A EP 10726923A EP 2435993 B1 EP2435993 B1 EP 2435993B1
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EP
European Patent Office
Prior art keywords
microsystem
security
accordance
light source
purposes
Prior art date
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EP10726923.5A
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German (de)
English (en)
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EP2435993A1 (fr
Inventor
Anett Bailleu
Martin Sprenger
Thomas Hennig
Olaf Brodersen
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.)
Cis Forschungsinstitut fur Mikrosensorik und Photovoltaik GmbH
Bundesdruckerei GmbH
Original Assignee
Cis Forschungsinstitut fur Mikrosensorik und Photovoltaik GmbH
Bundesdruckerei GmbH
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Publication of EP2435993A1 publication Critical patent/EP2435993A1/fr
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    • 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
    • G07D7/121—Apparatus characterised by sensor details
    • 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
    • G07D7/02—Testing electrical properties of the materials thereof
    • G07D7/026—Testing electrical properties of the materials thereof using capacitive sensors

Definitions

  • the present invention relates to a microsystem for detecting predetermined features of securities, security documents or other products, for example for the secure detection of security features on banknotes. Furthermore, the invention relates to a test device for checking the authenticity of securities, security documents or other products.
  • the DE 10 2006 059 865 A1 shows a document with a security feature and an optical element, wherein the optical element between a first non-transparent state and a second transparent state is switchable.
  • the optical element is arranged so that in its first state it prevents optical access to the security feature.
  • the security feature preferably contains optically readable information.
  • the security feature is a digital watermark or a one- or two-dimensional barcode.
  • the watermark or the barcode can be printed on the document.
  • a reader which is suitable for the verification of said document, has means for switching the optical element from the first to the second state to allow an optical access to the security feature.
  • the reading device also has an optical sensor for automatic detection of the security feature.
  • the DE 101 13 268 A1 shows a sensor for authentication of security features on value and / or security documents. At least one security element is inserted or applied in or on the security document. The security element is excited with radiation of a preset excitation wavelength. Subsequently, the security element emits radiation, wherein the emitted radiation is detected by a detection unit and evaluated by an evaluation unit. The intensity profile of the emitted radiation is detected and analyzed in a predetermined wavelength range over a predetermined measurement period after the excitation.
  • the security feature is preferably an anti-Stokes phosphor which is capable of converting comparatively low-energy infrared excitation radiation into more energy-rich radiation.
  • the DE 198 26 800 A1 shows a method for producing special paper with electrically conductive pigments as a security feature.
  • the detection of this security feature is realized by means of capacitive sensors.
  • barium sulfate is used as the feature substance, thereby providing additional optical coding because barium sulfate absorbs infrared light.
  • the required sensor arrangement comprises a capacitive Sensor and an optical scanner sensor. The higher security achievable with this feature substance has the disadvantage that a complex sensor arrangement is required to test such a security feature.
  • the US 6,327,376 B1 shows an electronic device for measuring a fingerprint.
  • the fingerprint is measured with a remission optical component.
  • the position of the skin grooves in the fingerprint is determined by utilizing a capacitive effect.
  • the device comprises several electrodes on a sensor field.
  • the sensor array comprises a substrate on which the electrodes are arranged.
  • the WO 2008/137851 A1 shows a sensor for taking measurements in the brain of a human.
  • the sensor has a plurality of light sources and light sensors, which are arranged together with electrodes on a thin layer.
  • the US 6,573,983 B1 shows an optical sensor, which can be combined with additional sensors, which usually detect security features present in value documents.
  • the multiple sensors are constructed independently of each other and not arranged on a common carrier substrate.
  • the DE 10 2006 049 284 A1 shows inter alia a detection device for detecting a clear medium information of a security printing.
  • the detection device comprises at least one optical sensor for detecting the medium information, which is selected from a group comprising area camera, line scan camera, UV sensor and / or IR sensor.
  • the detection device preferably further comprises a sensor, which consists of a group comprising a magnetic sensor, Eddy current sensor, capacitive sensor and / or inductive sensor is selected.
  • the object of the invention is to provide a sensor arrangement, on the one hand, combined security features of securities, security documents or other products can be tested and on the other hand, inexpensive to produce and simple and versatile.
  • the microsystem according to the invention is a miniaturized device, as is known in principle from microsystem technology.
  • the microsystem according to the invention is based on a carrier substrate, for example in the form of a chip, which consists of silicon or another semiconductor. But other materials, such as special plastics can be used as material for the carrier substrate.
  • sensors in the form of at least one remission optical component and a capacitor are arranged directly or indirectly via layers lying therebetween.
  • the remission optical component serves to detect optical properties of predetermined features that are arranged on or in the securities, security documents or other products to be recognized.
  • the remission optical component comprises at least one light source and at least one optical sensor.
  • the light source serves to emit light on the predetermined features to be recognized.
  • the optical sensor detects the light remitted by the features.
  • the capacitor is formed for example in the form of a stray field capacitor by means of electrodes and serves to detect dielectric properties or else to measure other electrical properties of the predetermined features to be detected.
  • the dielectric properties of the features to be detected affect the capacitance of the capacitor, whereby the features can be electrically detected.
  • the characteristic layer structure of a value or security document can be detected via the variation of the penetration depth of the electric field become.
  • the capacitor can be used to determine the impedance of a feature.
  • the microsystem according to the invention a multifunctional miniaturized component is available which can be used to test the authenticity of securities or security documents or else to detect plagiarism in product protection.
  • the microsystem according to the invention is suitable for detecting the predetermined features on or in the securities, security documents or other products, for example for the secure detection of security features on banknotes and tax stamps.
  • the features to be recognized may be additional security features applied in addition to other predetermined features that comprise the securities, security documents or other products due to their structure or design.
  • the features to be recognized need not be visible on the surface of the security, security document or other product.
  • the microsystem according to the invention is suitable for the reliable detection of features which can be detected on the basis of their optical or dielectric properties.
  • the microsystem is also suitable for the detection of predetermined features that can be detected on the basis of their optical and their dielectric properties.
  • the microsystem according to the invention is largely universally suitable for the detection of predetermined features of securities, security documents or other products. Because of the universal suitability, it can be produced in high quantities and thus cost-effectively.
  • the microsystem according to the invention is a miniaturized component which has dimensions of typically less than 1 cm ⁇ 2 cm, as a result of which it requires little effort in existing or new systems Document or product inspection can be integrated. It can also be used in mobile systems due to its small dimensions.
  • the light source of the microsystem according to the invention is preferably formed by at least one LED (light-emitting diode), which is arranged in a recess of the carrier substrate.
  • LED can be realized with very small dimensions and are therefore particularly suitable for the microsystem of the invention.
  • the arrangement of the LED in a recess of the carrier substrate ensures, on the one hand, a mechanical protection of the LED and, on the other hand, a minimum distance from the feature to be detected.
  • the light source may also be formed by an incandescent, glow, fluorescent or other type of lamp.
  • the light source is formed by a plurality of LEDs or by a plurality of lasers, which are arranged in different deep recesses of the carrier substrate.
  • This embodiment is suitable, for example, for the detection of predetermined features which have a different depth in the security, security document or other product to be tested.
  • the light source is formed by a plurality of LEDs which emit light of different wavelengths.
  • This embodiment is suitable for detecting predetermined features that are excitable by light of different wavelengths.
  • the LEDs which emit light of different wavelengths can also be in different deep recesses the carrier substrate are arranged. This is suitable for the detection of predetermined features which can be excited by light of different wavelengths and are arranged at different depths in the security paper, security document or other product to be tested.
  • the different wavelengths can be generated with different LEDs or different voltages applied to the LED.
  • the optical sensor of the microsystem according to the invention is preferably formed by at least one photodiode, which is formed as a layer on the carrier substrate.
  • Microsystems in the form of a semiconductor chip are particularly well suited for applying an electronic component, such as a silicon photodiode, as a layer to the latter.
  • the optical sensor of the microsystem according to the invention can also be formed by other optical sensors, such as a photocell, a phototransistor or a CCD element.
  • the layer forming the photodiode is preferably segmented, wherein the segmentation may be carried out in the direction of one of the two expansions or in both directions of the expansions of the layer.
  • a large-area segmented design of the photodiode allows lateral distributions of the light reflected by the features to be recognized and evaluated. This allows conclusions about the geometric arrangement of the features and thus a higher level of security in the detection of the predetermined features.
  • the electrodes forming the capacitor are preferably likewise formed by a layer on the carrier substrate or on an intermediate layer. This is an electrically conductive layer, which corresponds to the respective requirements is structured.
  • the electrodes may be formed by a respective comb-like, spiral-like and / or rotationally symmetrical structure.
  • the comb-like structures can be arranged protruding into one another.
  • the capacitor is preferably designed as a stray field capacitor, it being possible for an insulator layer to be arranged above the layer forming the electrodes or not.
  • the structured layer forming the electrodes is particularly preferably arranged on an intermediate layer above the layer forming the photodiode.
  • the intermediate layer can be, for example, a glass layer which is arranged on the carrier substrate.
  • the microsystem according to the invention is preferably encapsulated by an encapsulation for its mechanical protection, the encapsulation being optically transparent in the region of the remission optical component.
  • the remission optical component may be configured to be used to detect many different optical Properties is suitable.
  • the microsystem according to the invention can be used for the detection of many different types of features, for example for the detection of material-specific absorption properties of substrates, pigments, binders and the like. in different wavelength ranges, up- and down-conversion effects, the presence of brighteners and much more.
  • the microsystem according to the invention is to be electrically connected to the system for document or product testing to be used.
  • the microsystem in the simplest case electrical connections, via which the remission optical component and the capacitor are directly connected.
  • the microsystem according to the invention can also be embodied with a control and evaluation electronics via which the remission-optical component and the capacitor can be electrically operated.
  • the control and evaluation electronics are formed on the carrier substrate, preferably as a microelectronic semiconductor circuit.
  • the control and evaluation electronics can be configured to test predetermined features of a security, security document or other product to be tested, both in terms of their optical and dielectric properties, and the control and evaluation electronics issue a logical signal as to whether the security security document being audited or other product is genuine or not.
  • Such an embodiment of the microsystem of the invention allows both a high level of security in the document or product testing by the simultaneous examination of several properties of the predetermined features as also the simplest integration into different systems for document and product testing.
  • the microsystem according to the invention may also include other optical and electrical sensors, but also mechanical and magnetic sensors. As a result, the microsystem can be adapted to recognize further features or security features.
  • test apparatus for checking the authenticity of securities, security documents or other products in which a microsystem according to the invention is integrated.
  • the testing device according to the invention is suitable for testing different securities, security documents or other products and, because of the small dimensions of the microsystem, can also be implemented as a mobile device.
  • Fig. 1 shows a perspective view of a preferred embodiment of a microsystem according to the invention, which is suitable for detecting different predetermined features on or in securities, security documents and other products.
  • the microsystem initially comprises a carrier substrate 01 made of silicon in the form of a cuboid chip.
  • the carrier substrate 01 determines the basic shape of the microsystem according to the invention and serves as a carrier for a remission-optical component 02 and a stray field capacitor 03.
  • the remission-optical component 02 comprises a light source 04, which is formed from three LEDs 06, 07, 08.
  • the three LEDs 06, 07, 08 are arranged in one row and are located in a recess 09 of the carrier substrate 01.
  • the three LEDs 06, 07, 08 emit light of different wavelengths to visually stimulate different features of securities, security documents and other products can.
  • a plurality of the same LED for example, three white LED lights are used to stimulate the predetermined features with different levels of light can.
  • the three LEDs 06, 07, 08 each have their own connection cables 11 so that the LEDs 06, 07, 08 can be controlled separately.
  • the microsystem according to the invention can also be embodied with further LEDs, for example in a matrix arrangement.
  • the LEDs can also be distributed over a plurality of depressions in the carrier substrate 01.
  • the remission optical component 02 further comprises a photodiode 12.
  • the photodiode 12 has a large area and extends almost over the entire surface of the carrier substrate 01.
  • the photodiode 12 is a silicon photodiode which is applied as a layer on the carrier substrate 01 , The microsystem according to the invention but can also be performed with other optical sensors or detectors.
  • the photodiode 12 is designed segmented. It consists of four segments 13, 14, 16, 17, whereby an evaluation of lateral distributions of the light remitted by the predetermined features is made possible. For this purpose, the four segments 13, 14, 16, 17 of the photodiode 12 own leads 18. To identify predetermined optical characteristics of securities, security documents or other products, the predetermined features using the light source 04 are optically excited.
  • the light emitted by the light source 04 is reflected in a certain way, ie reflected and possibly converted with respect to the wavelength range. If the predetermined feature of the security, security document or other product does not exist, the light of the light source 04 is not returned or remitted with another characteristic. The light remitted by the predetermined features is measured by means of the photodiode 12. Via a control and evaluation (not shown) can determine whether the feature in question on the security, security document or other product is present or not.
  • the stray field capacitor 03 comprises four electrodes 21, 22, 23, 24, which extend over the surface of the carrier substrate 01.
  • the four electrodes 21, 22, 23, 24 are designed as strip conductors and are provided as a layer on an intermediate layer 25 made of glass over the layer forming the photodiode 12.
  • the four electrodes 21, 22, 23, 24 are designed like a comb, wherein in each case two of the four electrodes 21, 22; 23, 24 are interlaced with each other.
  • the paired electrodes 21, 22; 23, 24 are arranged symmetrically with respect to the light source 04.
  • the four electrodes 21, 22, 23, 24 have separate connection lines (not shown), so that the formed stray field capacitor 03 is controlled differently. This makes it possible to detect different dielectric features of the securities, security documents or products.
  • the stray field capacitor 03 can be controlled in such a way that the layer structure characteristic of a security or security document can be detected via the variation of the penetration depth of the electric field of the stray field capacitor 03.
  • the stray field capacitor 03 allows non-contact detection of predetermined dielectric features.
  • the microsystem according to the invention can be used universally for the detection of optical or dielectric features. However, securities, security documents or other products that have both optical and dielectric security features can also be checked for authenticity. Therefore, the microsystem according to the invention can be used for cost-effective system solutions.
  • the recognition reliability can be further increased by a combination of differently configured microsystems according to the invention, as a result of which, for example, new types of counterfeiting can also be detected.
  • Fig. 2 shows a further embodiment of a microsystem according to the invention 31 and a security feature 32 of an object to be tested 33, for example a security.
  • the representation represents the principle in a cross section.
  • the light source 38 comprises a first LED 39, a second LED 41 and a third LED 42.
  • the first LED 39, the second LED 41 and the third LED 42 are in different deep recesses 43 in the support substrate 36, so that the three LEDs 39, 41, 42 have a different distance to the object 33 to be tested.
  • the three LEDs 39, 41, 42 emit light of different wavelengths.
  • the light emitted by the three LEDs 39, 41, 42 is reflected in a special way by the feature 32 and impinges on the photodiode 37.
  • the emitted and remitted light is indicated in each case by beam paths 46.
  • the characteristics of the light measured by the photodiode 37 allow conclusions to be drawn as to whether this light has been remitted or not by the security feature 32 of the object 33 to be tested.
  • a transparent plate 48 is further indicated in cross section, which is located between the microsystem 31 and the object 33 to be tested.
  • the transparent plate 48 may be formed, for example, by a window of a document checking device.
  • Fig. 3 shows a remission optical component 51 of a microsystem according to the invention and an optical feature 52 to be recognized in a schematic representation in cross section.
  • the remission optical component 51 comprises a photodiode 53 and a light source 54, which is formed by LEDs.
  • the photodiode 53 and the light source 54 are located on a carrier substrate 56 of the microsystem according to the invention.
  • the feature 52 to be detected of an object 57 to be tested is located above the microsystem according to the invention.
  • the light source 54 emits light, which is indicated by a light cone 58.
  • Feature 52 remits the light emitted from the light source 54.
  • the lateral distribution of the luminance of the remitted light is represented by a graph 59.
  • the luminance of the remitted light has two maxima 61 which are locally laterally adjacent to the feature 52. Due to the segmented structure of the photodiode 53 (shown in detail in FIG Fig. 1 ), the lateral profile 59 of the remitted light can be recorded. Thus, in comparison to a singular photodiode, not only the averaged measure of the luminance of the remitted light can be determined, but it is also possible to detect a characteristic of the characteristic 52 lateral profile of the luminance of the remitted light. As a result, it can be determined with a high degree of certainty whether the object 57 to be checked contains the feature 52 or not.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Claims (9)

  1. Microsystème (31) pour identifier des caractéristiques prédéfinies (32, 52) de papiers de val eur (33, 57), des documents de sécurité ou autres produits, pour lequel il s'agit d'un appareil miniaturisé de la technique des microsystèmes et qui comprend les composants suivants :
    - un composant optique de déflectance (02, 51) pour la détection des propriétés optiques des caractéristiques prédéfinies (32, 52), avec une source lumineuse (04, 38, 54) pour émission de lumière sur les caractéristiques prédéfinies (32, 52) et un capteur optique (12, 37, 53) pour la détection de la lumière renvoyée par les caractéristiques prédéfinies (32, 52),
    - un condensateur (03) formé par des électrodes (21, 22, 23, 24) pour la détection des propriétés électriques des caractéristiques prédéfinies (32, 52), et
    - un substrat de support (01, 36, 56) sous la forme d'une puce à semi-conducteurs, sur laquelle sont directement ou indirectement disposés les composants optiques de déflectance (02, 51) et le condensateur (03),
    caractérisé en ce que le capteur optique est formé par au moins une photodiode (12, 37, 53), qui est constituée comme couche sur le substrat de support (01, 36, 56) et en ce que les électrodes (21, 22, 23, 24) sont formées par une couche structurée, laquelle est disposée sur une couche intermédiaire (25) sur la couche formant la photodiode (12).
  2. Microsystème (31) selon la revendication 1 caractérisé en ce que la source lumineuse (04, 38, 54) est formée par au moins une diode électroluminescente (DEL) (06, 07, 08, 39, 41, 42) ou une source lumineuse au laser, qui est disposée dans une cavité (09, 43) du substrat de support (01, 36, 56).
  3. Microsystème (31) selon la revendication 1 ou 2 caractérisé en ce que la source lumineuse (38) est formée par plusieurs DEL (39, 41, 42) ou par plusieurs lasers, qui sont disposés dans des cavités de profondeurs différentes (43) du substrat de support (36).
  4. Microsystème (31) selon la revendication 2 ou 3 caractérisé en ce que la source lumineuse (04, 38) est formée par plusieurs DEL (06, 07, 08, 39, 41, 42), qui émettent la lumière de longueur d'onde différente.
  5. Microsystème selon l'une quelconque des revendications 1 à 4 caractérisé en ce que la couche structurée formant les électrodes (21, 22, 23, 24) comporte des structures en forme de peigne, de spirale et/ou symétriques en rotation.
  6. Microsystème (31) selon l'une quelconque des revendications 1 à 5 caractérisé en ce que la couche formant la photodiode (12, 37, 53) est segmentée.
  7. Microsystème (31) selon l'une quelconque des revendications 1 à 6 caractérisé en ce qu'un système de commande et d'évaluation destiné au fonctionnement des composants optiques de réflectance (02, 51) et du condensateur (03) est constitué sur le substrat de support (01, 36, 56).
  8. Microsystème (31) selon l'une quelconque des revendications 1 à 7 caractérisé en ce qu'il est encapsulé dans un blindage, le blindage étant optiquement transparent dans la zone des composants optiques de réflectance (02, 51).
  9. Appareil de contrôle pour contrôler l'authenticité des papiers de valeur (33, 57), des documents de sécurité ou autres produits, dans lequel un microsystème (31) est intégré selon l'une quelconque des revendications 1 à 8.
EP10726923.5A 2009-05-26 2010-05-25 Microsystème pour reconnaître des caractéristiques prédéfinies de papiers de valeur, de documents de sécurité ou d'autres produits Active EP2435993B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009026488A DE102009026488A1 (de) 2009-05-26 2009-05-26 Mikrosystem zur Erkennung vorbestimmter Merkmale von Wertpapieren, Sicherheitsdokumenten oder sonstigen Produkten
PCT/EP2010/057096 WO2010136418A1 (fr) 2009-05-26 2010-05-25 Microsystème pour reconnaître des caractéristiques prédéfinies de papiers de valeur, de documents de sécurité ou d'autres produits

Publications (2)

Publication Number Publication Date
EP2435993A1 EP2435993A1 (fr) 2012-04-04
EP2435993B1 true EP2435993B1 (fr) 2016-07-06

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EP10726923.5A Active EP2435993B1 (fr) 2009-05-26 2010-05-25 Microsystème pour reconnaître des caractéristiques prédéfinies de papiers de valeur, de documents de sécurité ou d'autres produits

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EP (1) EP2435993B1 (fr)
DE (1) DE102009026488A1 (fr)
WO (1) WO2010136418A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011076865A1 (de) * 2011-06-01 2012-12-06 Bundesdruckerei Gmbh Sensorkarte und Verifikationsverfahren zur magnetischen und optischen Prüfung von Dokumenten

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Publication number Priority date Publication date Assignee Title
US4355300A (en) * 1980-02-14 1982-10-19 Coulter Systems Corporation Indicia recognition apparatus
GB2296122B (en) * 1994-12-16 1998-07-15 Nicholas Quill Bank-note checking
US6114862A (en) * 1996-02-14 2000-09-05 Stmicroelectronics, Inc. Capacitive distance sensor
US6573983B1 (en) * 1996-11-15 2003-06-03 Diebold, Incorporated Apparatus and method for processing bank notes and other documents in an automated banking machine
GB9725571D0 (en) * 1997-12-04 1998-02-04 Philips Electronics Nv Electronic apparatus comprising fingerprint sensing devices
DE19836503B4 (de) * 1998-08-12 2007-09-20 WHD elektronische Prüftechnik GmbH Verfahren zur Herstellung eines Sicherheitsmerkmals
DE19826800A1 (de) 1998-06-16 1999-12-23 Frank Puttkammer Herstellung von Spezialpapieren zum Ursprungsnachweis mit elektrisch leitenden Merkmalsstoffen und Prüfung derselben
EP1158775A1 (fr) * 2000-05-15 2001-11-28 EASTMAN KODAK COMPANY (a New Jersey corporation) Dispositif d'imagerie en couleurs autoéclairé
DE10113268B4 (de) 2001-03-16 2021-06-24 Bundesdruckerei Gmbh Sensor für die Echtheitserkennung von Sicherheitsmerkmalen auf Wert und/oder Sicherheitsdokumenten
EP1587030A4 (fr) * 2003-01-23 2011-05-18 Aruze Corp Capteur d'identification
AT502714B1 (de) * 2005-10-25 2012-04-15 Binder Consulting Gmbh Verfahren zur erstellung und überprüfung eines sicheren klartextdruckes, sowie vorrichtung und informationsträger hierfür
DE102006059865B4 (de) 2006-12-15 2021-01-07 Bundesdruckerei Gmbh Dokument mit einem Sicherheitsmerkmal
WO2008137851A1 (fr) * 2007-05-03 2008-11-13 Cornell Research Foundation, Inc. Capteur électro-optique sous-dural
DE102007031230B3 (de) * 2007-07-04 2008-10-30 Bundesdruckerei Gmbh Dokumentenerfassungssystem und Dokumentenerfassungsverfahren

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EP2435993A1 (fr) 2012-04-04
DE102009026488A1 (de) 2010-12-02

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