EP0978108B1 - Application and method for checking documents with effective optical diffraction security layer - Google Patents

Application and method for checking documents with effective optical diffraction security layer Download PDF

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Publication number
EP0978108B1
EP0978108B1 EP98932026A EP98932026A EP0978108B1 EP 0978108 B1 EP0978108 B1 EP 0978108B1 EP 98932026 A EP98932026 A EP 98932026A EP 98932026 A EP98932026 A EP 98932026A EP 0978108 B1 EP0978108 B1 EP 0978108B1
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Prior art keywords
application
layers
checking
authenticity
metal layers
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EP98932026A
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German (de)
French (fr)
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EP0978108A2 (en
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Frank Puttkammer
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WHD Elektronische Prueftechnik GmbH
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WHD Elektronische Prueftechnik GmbH
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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
    • G07D7/003—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
    • G07D7/0032—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 using holograms
    • 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

  • US 4,255,652 and EP 0 097 570 A2 include authenticity tests of Documents, wherein at least one security element with an electrical Coding of information by means of bar-shaped, electrically conductive structures capacitive sensing determines the electrical conductivity and through Reference signal comparison is evaluated.
  • fine structures like them can be found for example in holograms, can be specified by the Do not detect procedure.
  • US 4,913,504 describes the production of metallic Holograms, without going into a novel security-relevant authenticity check.
  • a further increase in test safety results from the combination of the test electrical conductivity with further authenticity features of the diffractive optical effective Layer By introducing additional authenticity features into demetallized segments within discontinuous metallization layers and / or partially metallic ones Layers and / or between zones of metallic layers in different planes At the same time, these characteristics as well as the electrical conductivity can be tested.
  • Evaluation electronics is an authenticity signal of another sensor for determining the authenticity logically linked to the sensor for measuring the electrical conductivity.
  • At the exit the evaluation is a classifying the diffractive optical effective layer Signal for further processing.
  • This additional authenticity feature has fluorescent, phosphorescent or light-absorbing properties or differs from its environment due to different magnetic properties. Accordingly, an optical or magnetic sensor is used.

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  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Holo Graphy (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)

Abstract

The invention relates to an application and a method for checking documents. Hitherto, documents with optical diffraction security layers, specially holograms, were checked by costly optical monitoring technology. The entire monitoring process was so time-consuming that the monitoring process could not be applied to fast operating processing machines. Rapid monitoring (as an authentication characteristic) constitutes a further security step in evaluating effective optical diffraction security layers. The effective optical diffraction layer has a discontinuous metallizing layer and/or partially metal layers and/or areas of metal layers on various planes. Several methods of measurement exist to detect electrical conductivity. In practice, the contactless capacitive method of measurement has proven to be more practical.

Description

Die Erfindung bezieht sich auf eine Anwendung und ein Verfahren zur Prüfung von Dokumenten.The invention relates to an application and a method for testing Documents.

Bisher werden Dokumente mit beugungsoptischen Sicherheitsschichten, insbesondere Hologrammen, mit aufwendiger optischer Prüftechnik kontrolliert. Dabei muß das Prüfobjekt sehr genau positioniert werden. Der gesamte Prüfprozeß dauert dabei so lange, daß diese Prüfverfahren in schnellaufenden Bearbeitungsmaschinen keine Anwendung finden. Ein Test beispielsweise von Banknoten mit Hologrammechtheitsmerkmal ist innerhalb einer Banknotenzählmaschine nicht möglich, da diese mit Geschwindigkeiten zwischen 500 und 1500 Banknoten pro Minute und darüber hinaus arbeitet. Die DE 27 47 156 beschreibt ein Verfahren und ein Prüfgerät zur Echtheitsprüfung holographisch abgesicherter Identitätskarten. Das Hologramm wird reproduziert und eine Sichtkontrolle durchgeführt. Für eine schnelle, effiziente, personenunabhängige Prüfung ist dieses Verfahren nicht geeignet. In der EP 0 042 946 wird eine Vorrichtung zur Erzeugung von Abtastmustern beschrieben, die mittels Laser, Spiegel- und Linsensystem sowie einem Photodetektor geprüft werden. Der ökonomische Aufwand ist auch in diesem Fall sehr hoch. Er würde noch weiter steigen, wenn das Prüfgut unsortiert kontrolliert werden soll. Um eine Vorsortierung zu vermeiden, wäre eine mehrfache Anordnung des Echtheitsprüfsystems notwendig.So far, documents with diffractive optical security layers, in particular Holograms, controlled by sophisticated optical inspection technology. The test object must be be positioned very accurately. The entire test process takes so long that this Test methods in high-speed processing machines do not apply. A test For example, banknotes with hologram authenticity feature is within one Banknote counter not possible since these with speeds between 500 and 1500 banknotes per minute and beyond works. DE 27 47 156 describes a Method and apparatus for checking the authenticity holographically secured Identity cards. The hologram is reproduced and a visual inspection performed. For a fast, efficient, person-independent exam, this method is not suitable. In EP 0 042 946 describes a device for generating scanning patterns which be checked by laser, mirror and lens system and a photodetector. Of the Economic effort is very high in this case too. He would continue to rise, though the test material is to be controlled unsorted. To avoid presorting would be a multiple arrangement of the authenticity testing system necessary.

Die US 4,255,652 sowie die EP 0 097 570 A2 beinhalten Echtheitsprüfungen von Dokumenten, wobei von mindestens einem Sicherheitselement mit einer elektrischen Kodierung von Informationen mittels balkenförmiger, elektrisch leitender Strukturen durch kapazitive Abtastung die elektrische Leitfähigkeit bestimmt und durch Referenzsignalvergleich ausgewertet wird. Insbesondere feine Strukturen, wie sie beispielsweise in Hologrammen anzutreffen sind, lassen sich durch die angegebenen Verfahren nicht detektieren. Die US 4,913,504 beschreibt die Herstellung von metallischen Hologrammen, ohne auf eine neuartige sicherheitsrelevante Echtheitsprüfung einzugehen.US 4,255,652 and EP 0 097 570 A2 include authenticity tests of Documents, wherein at least one security element with an electrical Coding of information by means of bar-shaped, electrically conductive structures capacitive sensing determines the electrical conductivity and through Reference signal comparison is evaluated. In particular, fine structures, like them can be found for example in holograms, can be specified by the Do not detect procedure. US 4,913,504 describes the production of metallic Holograms, without going into a novel security-relevant authenticity check.

Aufgabe der Erfindung ist es, die Nachteile des Standes der Technik zu beseitigen und eine Anwendung und ein Verfahren zur Prüfung von Dokumenten mit beugungsoptisch wirksamen Sicherheitsschichten, insbesondere Hologrammen, vorzuschlagen, die schnell, personenunabhängig und mit geringem Aufwand zu realisieren sind. Das Verfahren soll sowohl in Dokumentenprüfeinrichtungen und Geldbearbeitungsmaschinen, als auch in Handprüfgeräten zur Prüfung von Dokumenten mit beugungsoptisch wirksamen Sicherheitsschichten Anwendung finden.The object of the invention is to eliminate the disadvantages of the prior art and a Application and a method for testing documents with optical diffraction efficiency Security layers, in particular holograms, which are fast, Person-independent and with little effort to realize. The procedure should both in document checkers and cash handling machines, as well as in Hand-held testers for the examination of documents with diffractive optical effective Security layers find application.

Diese Aufgabenstellung wird durch die im kennzeichnenden Teil des Anspruchs 1 gegebenen Merkmale gelöst.This task is given by the characterizing part of claim 1 Characteristics solved.

Der Einsatz von Hologrammen und anderen beugungsoptisch wirksamen Sicherheitsschichten zur Sicherung von Urkunden und anderen Wertpapieren sowie Banknoten gegen Fälschungen ist gegenwärtig immer häufiger anzutreffen. Eine schnelle Prüfbarkeit stellt eine weitere Sicherheitsstufe beim Bewerten der beugungsoptisch wirksamen Schichten als Echtheitsmerkmal dar. Beugungsoptisch wirksame Schichten bestehen unter anderem aus einer metallisierten Schicht. Diese Metallisierungsschicht ist elektrisch leitend. Entsprechend der Schichtdicke ändert sich die elektrische Leitfähigkeit. Die beugungsoptisch wirksame Schicht weist eine diskontinuierliche Metallisierungsschicht und/oder partiell metallische Schichten und/oder Zonen metallischer Schichten in unterschiedlichen Ebenen auf. Es sind verschiedene Meßverfahren bekannt, welche eine elektrische Leitfähigkeit nachweisen. In der Praxis hat sich das kontaktlose, kapazitive Meßverfahren als praktikabel erwiesen. Bei diesem Verfahren zur Prüfung von Sicherheitsdokumenten wird die kapazitive Kopplung zwischen Sender und Empfänger und Übertragung von Energie zwischen Sender und Empfänger durch Überbrückung eines elektromagnetischen Feldes durch elektrisch leitende Sicherheitsmaterialien ausgenutzt. Eine nachfolgende Auswerteelektronik vergleicht das Signalbild des Prüflings mit entsprechenden Referenzsignalen. Der Vergleich liefert ein klassifizierendes Signal zur Weiterverarbeitung. Dementsprechend könnte beispielsweise ein als Falsifikat erkanntes Dokument aussortiert werden, indem die Prüfeinrichtung gestoppt wird. Das Signalbild ist abhängig von der Struktur der metallisierten Schicht der beugungsoptisch wirksamen Schicht. Weisen die beugungsoptisch wirksamen Schichten eine diskontinuierliche Metallisierungsschicht auf, so besitzen mehrere Segmente der Metallisierungsschicht unterschiedliche elektrische Leitfähigkeiten. Die Praxis hat gezeigt, daß diese unterschiedlichen Leitfähigkeiten sich auf das Signalbild auswirken.The use of holograms and other diffractive optical safety layers to secure documents and other securities as well as banknotes against counterfeiting is currently more common. A quick testability is another Security level when evaluating the diffractive optical layers as Authenticity feature. Diffractive optical effective layers consist inter alia a metallized layer. This metallization layer is electrically conductive. Corresponding the layer thickness changes the electrical conductivity. The diffractive optical effective Layer has a discontinuous metallization layer and / or partially metallic Layers and / or zones of metallic layers in different planes. There are Various measuring methods are known which detect electrical conductivity. In the In practice, the contactless, capacitive measuring method has proven to be practicable. In this Procedure for checking security documents is the capacitive coupling between Transmitter and receiver and transmission of energy between transmitter and receiver Bridging an electromagnetic field by electrically conductive Exploited security materials. A subsequent transmitter compares this Signal image of the test object with corresponding reference signals. The comparison delivers Classifying signal for further processing. Accordingly, for example, a discarded as a counterfeit document by stopping the test facility becomes. The signal image is dependent on the structure of the metallized layer diffractive optical effective layer. Do the diffractive optical layers have a discontinuous metallization on, so have several segments of the Metallization layer different electrical conductivities. Practice has shown that these different conductivities affect the signal image.

Eine weitere Erhöhung der Prüfsicherheit ergibt sich aus der Kombination der Prüfung der elektrischen Leitfähigkeit mit weiteren Echtheitsmerkmalen der beugungsoptisch wirksamen Schicht. Durch Einbringen von zusätzlichen Echtheitsmerkmalen in demetallisierte Segmente innerhalb von diskontinuierlichen Metallisierungsschichten und/oder partiell metallischen Schichten und/oder zwischen Zonen metallischer Schichten in unterschiedlichen Ebenen lassen sich gleichzeitig diese Merkmale sowie die elektrische Leitfähigkeit prüfen. Mittels der Auswerteelektronik wird ein Echtheitssignal eines weiteren Sensors zur Echtheitsbestimmung logisch mit dem Sensor zur Messung der elektrischen Leitfähigkeit verknüpft. Am Ausgang der Auswerteelektronik liegt ein die beugungsoptisch wirksame Schicht klassifizierendes Signal zur weiteren Verarbeitung an. Dieses zusätzliche Echtheitsmerkmal besitzt fluoreszierende, phosphoreszierende oder Licht absorbierende Eigenschaften oder unterscheidet sich durch unterschiedliche magnetische Eigenschaften von dessen Umgebung. Dementsprechend findet ein optischer oder magnetischer Sensor Anwendung. Zur Verminderung von Detektions- und Meßfehlern wird vorzugsweise ein Sensorträger verwendet. Dieser Sensorträger nimmt alle Sensoren zur Detektion von Echtheitsmerkmalen auf. Die Abstände zwischen den Sensoren werden so minimiert und die Sensoren immer in definierter Lage angeordnet. Um Störeinflüsse zu vermeiden, wird der Sensorträger kompakt mit einer Platine verbunden, welche die Auswerteelektronik trägt. Die gesamte Prüfeinrichtung befindet sich innerhalb von Bearbeitungsmaschinen, so daß keine zusätzlichen Aufwendungen zum Transport der Prüfobjekte notwendig sind.A further increase in test safety results from the combination of the test electrical conductivity with further authenticity features of the diffractive optical effective Layer. By introducing additional authenticity features into demetallized segments within discontinuous metallization layers and / or partially metallic ones Layers and / or between zones of metallic layers in different planes At the same time, these characteristics as well as the electrical conductivity can be tested. By means of Evaluation electronics is an authenticity signal of another sensor for determining the authenticity logically linked to the sensor for measuring the electrical conductivity. At the exit the evaluation is a classifying the diffractive optical effective layer Signal for further processing. This additional authenticity feature has fluorescent, phosphorescent or light-absorbing properties or differs from its environment due to different magnetic properties. Accordingly, an optical or magnetic sensor is used. to Reduction of detection and measurement errors is preferably a sensor carrier used. This sensor carrier takes all sensors for the detection of authenticity features on. The distances between the sensors are thus minimized and the sensors always in arranged in a defined position. To avoid interference, the sensor carrier is compact connected to a board which carries the transmitter. The whole Testing device is located within processing machines, so that no additional expenses for the transport of the test objects are necessary.

Die Merkmale der Erfindung gehen außer aus den Ansprüchen auch aus der Beschreibung und den Zeichnungen hervor, wobei die einzelnen Merkmale jeweils für sich allein oder zu mehreren in Form von Unterkombinationen vorteilhafte, schutzfähige Ausführungen darstellen, für die hier Schutz beansprucht wird. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden Ausführungsbeispiel näher erläutert.The features of the invention go beyond the claims also from the description and the drawings, the individual features each alone or to several in the form of sub-combinations advantageous, protectable versions for which protection is claimed here. An embodiment of the invention is in the drawings and will be explained in more detail in the following embodiment.

In den Zeichnungen zeigen:

Fig. 1
schematischer Schnitt durch eine Bearbeitungsmaschine mit Prüfvorrichtung,
Fig. 2a
schematischer Schnitt durch ein Hologramm mit demetallisierten Segmenten
Fig. 2b
Spannungs-Zeit-Diagramm des Auswertesignals
Fig. 3a
schematischer Schnitt durch ein Hologramm mit diskontinuierlicher Metallisierungsschicht
Fig. 3b
Spannungs-Zeit-Diagramm des Auswertesignals
Fig. 4a
schematischer Schnitt durch ein Hologramm mit UV-Echtheitsmerkmal
Fig. 4b
Spannungs-Zeit-Diagramm des Auswertesignals der elektrischen Leitfähigkeitsprüfung
Fig. 4c
Spannungs-Zeit-Diagramm des Auswertesignals des UV-Sensors
In the drawings show:
Fig. 1
schematic section through a processing machine with testing device,
Fig. 2a
schematic section through a hologram with demetallisierten segments
Fig. 2b
Voltage-time diagram of the evaluation signal
Fig. 3a
schematic section through a hologram with discontinuous metallization layer
Fig. 3b
Voltage-time diagram of the evaluation signal
Fig. 4a
schematic section through a hologram with UV authenticity feature
Fig. 4b
Voltage-time diagram of the evaluation signal of the electrical conductivity test
Fig. 4c
Voltage-time diagram of the evaluation signal of the UV sensor

Das erfindungsgemäße Prüfverfahren sieht vor, daß in Banknotenzählmaschinen an geeigneten Positionen die entsprechenden Sensoren installiert werden. Die Sensoren zur Detektierung der elektrischen Leitfähigkeit sind derart ausgebildet, daß die gesamte Banknotenwegbreite überwacht wird, so daß der Sensor die Banknoten lageneutral prüfen kann. Optische oder mechanische Sensoren erfassen die Anwesenheit einer Banknote und liefern ein Referenzsignal für die Zeitsteuerung der Prüfvorrichtung 4. Gleichfalls werden dadurch die Sensoren zur Echtheitsprüfung des Hologramms aktiviert. Durch Aufzeichnung des gesamten Zeitfensters vom Beginn der Banknote bis zu ihrem Ende ist die Position des Hologramms auf der Banknote feststellbar.

  • In Fig. 1 wird dargestellt, wie die Prüfvorrichtung 4 im Transportweg der Banknote angeordnet ist. Die Banknotenzählmaschine beinhaltet ein Einzugsrad 1, Transporträder 2, eine Banknoten-leiteinrichtung 3 und eine Prüfvorrichtung 4.
  • Fig. 2a zeigt einen schematischen Schnitt durch ein Hologramm mit einer Trägerschicht 11 und einer partiell metallischen Schicht 12. Die partiell metallische Schicht 12 beinhaltet mehrere demetallisierte Segmente 13. In Fig. 2b ist das zugehörige Auswertesignal in einem Spannungs-Zeit-Diagramm dargestellt.
  • Fig. 3a zeigt einen schematischen Schnitt durch ein Hologramm mit einer Trägerschicht 11 und einer diskontinuierlichen Metallisierungsschicht 14. Die diskontinuierliche Metallisierungsschicht 14 beinhaltet Segmente 15, 16, 17, 18, 19 mit unterschiedlicher elektrischer Leitfähigkeit. In Fig. 3b ist das zugehörige Auswertesignal in einem Spannungs-Zeit-Diagramm dargestellt.
  • Fig. 4a zeigt einen schematischen Schnitt durch ein Hologramm mit einer Trägerschicht 11 und einer diskontinuierlichen Metallisierungsschicht 20. Die diskontinuierliche Metallisierungsschicht 20 beinhaltet demetallisierte Segmente 21 sowie zusätzliche Echtheitsprüfmerkmale. Bei diesen Echtheitsmerkmalen handelt es sich um fluoreszierende Farben 22, die bei der Prüfung mittels UV-Licht angeregt und mittels Photosensoren detektiert werden. Vorzugsweise befinden sich die zusätzlichen Echtheitsprüfmerkmale innerhalb der demetallisierten Segmente 21. In Fig. 4b ist das zugehörige Auswertesignal des kapazitiv arbeitenden, die elektrische Leitfähigkeit prüfenden Sensors in einem Spannungs-Zeit-Diagramm dargestellt. Fig. 4c zeigt in einem Spannungs-Zeitdiagramm den Verlauf des Auswertesignals des Photosensors.
    • The test method according to the invention provides that the corresponding sensors are installed in banknote counting machines at suitable positions. The sensors for detecting the electrical conductivity are designed such that the entire Banknotenwegbreite is monitored, so that the sensor can check the banknotes location neutral. Optical or mechanical sensors detect the presence of a banknote and provide a reference signal for the timing of the test apparatus 4. Likewise, the sensors are activated for checking the authenticity of the hologram. By recording the entire time window from the beginning of the banknote to its end, the position of the hologram on the banknote can be determined.
  • In Fig. 1 it is shown how the test device 4 is arranged in the transport path of the banknote. The banknote counting machine includes a feed wheel 1 , transport wheels 2 , a bill acceptor 3, and a tester 4 .
  • FIG. 2 a shows a schematic section through a hologram with a carrier layer 11 and a partially metallic layer 12 . The partially metallic layer 12 includes a plurality of demetallized segments 13 . In Fig. 2b, the associated evaluation signal is shown in a voltage-time diagram.
  • FIG. 3 a shows a schematic section through a hologram with a carrier layer 11 and a discontinuous metallization layer 14 . The discontinuous metallization layer 14 includes segments 15, 16, 17, 18, 19 with different electrical conductivity. In Fig. 3b, the associated evaluation signal is shown in a voltage-time diagram.
  • FIG. 4 a shows a schematic section through a hologram with a carrier layer 11 and a discontinuous metallization layer 20 . The discontinuous metallization layer 20 includes demetallized segments 21 as well as additional authentication features. These authenticity features are fluorescent colors 22 , which are excited during the test by means of UV light and detected by means of photosensors. Preferably, the additional authentication features are within the demetallized segments 21 . In Fig. 4b, the associated evaluation signal of the capacitive working, the electrical conductivity sensor is shown in a voltage-time diagram. 4c shows the course of the evaluation signal of the photosensor in a voltage-time diagram.

    • In der vorliegenden Erfindung wurde anhand eines konkreten Ausführungsbeispiels die Prüfung von Dokumenten mit beugungsoptisch wirksamen Sicherheitsschichten erläutert. Es sei aber vermerkt, daß die vorliegende Erfindung nicht auf die Einzelheiten der Beschreibung im Ausführungsbeispiel eingeschränkt ist, da im Rahmen der Patentansprüche Änderungen und Abwandlungen beansprucht werden.In the present invention was based on a specific embodiment of the Examination of documents with diffractive optical safety layers explained. It It should be noted, however, that the present invention is not limited to the details of the description is limited in the embodiment, since within the scope of the claims changes and modifications claimed.

    Claims (16)

    1. Application of a method for checking documents using the capacitive coupling between a transmitter and receiver and the transmission of energy between the transmitter and receiver through electrically conducting security materials, characterized in that, to check the authenticity of documents with diffractively effective security layers with a discontinuous metallization layer (14) or partially metal layers (12, 20) or zones of metal layers in different planes, the electrical conductivity is determined and evaluated.
    2. Application of the method according to Claim 1, characterized in that, to check the authenticity of documents with diffractively effective security layers with a discontinuous metallization layer (14) and partially metal layers (12, 20), the electrical conductivity is determined and evaluated.
    3. Application of the method according to Claim 1, characterized in that, to check the authenticity of documents with diffractively effective security layers with a discontinuous metallization layer (14) and zones of metal layers in different planes, the electrical conductivity is determined and evaluated.
    4. Application of the method according to Claim 1, characterized in that, to check the authenticity of documents with diffractively effective security layers with partially metal layers (12, 20) and zones of metal layers in different planes, the electrical conductivity is determined and evaluated.
    5. Application of the method according to Claim 1, characterized in that, to check the authenticity of documents with diffractively effective security layers with a discontinuous metallization layer (14) and partially metal layers (12, 20) and zones of metal layers in different planes, the electrical conductivity is determined and evaluated.
    6. Application of the method according to one or more of Claims 1 to 5, characterized by checking authenticity features which can be additionally introduced within demetallized segments within discontinuous metallization layers (14) and/or partially metal layers (12, 20) and/or between zones of metal layers in different planes.
    7. Application of the method according to Claim 6, characterized by checking the fluorescent properties of the authenticity feature which can be additionally introduced.
    8. Application of the method according to Claim 6, characterized by checking the phosphorescent properties of the authenticity feature which can be additionally introduced.
    9. Application of the method according to Claim 6, characterized by checking the light-absorbing properties of the authenticity feature which can be additionally introduced.
    10. Application of the method according to Claim 6, characterized by checking magnetic properties of the authenticity feature which can be additionally introduced that differ from the ambience.
    11. Application of the method according to one or more of the preceding claims, characterized in that the diffractively effective security layer is a hologram.
    12. Application of the method according to one or more of the preceding claims, characterized by the checking of holograms in high-speed processing machines at a speed of up to 2000 documents per minute.
    13. Application of the method according to one or more of the preceding claims, characterized by the checking of holograms in handheld devices.
    14. Method for checking documents using the capacitive coupling between a transmitter and receiver and the transmission of energy between the transmitter and receiver through electrically conducting security materials, characterized in that a document to be checked with a diffractively effective security layer with a discontinuous metallization layer (14) and/or partially metal layers (12, 20) and/or zones of metal layers in different planes is made to pass at a defined speed by sensor electronics, energy is transmitted capacitively from one or more transmitting electrodes via metallization layers to one or more receiving electrodes and the signals present at the receiving electrode or electrodes are amplified by means of evaluation electronics, compared with a reference signal and a signal classifying the document is present at the output of the evaluation electronics for further processing.
    15. Method according to Claim 14, characterized in that a document with diffractively effective security layers is checked in at least two different checking directions.
    16. Method according to Claim 14, characterized in that, by means of the evaluation electronics, a classifying signal is logically combined with an authenticity signal of an authenticity feature which can be additionally introduced after checking of the latter by means of a further sensor, and a combinational logic signal classifying the document is present at the output of the evaluation electronics for further processing.
    EP98932026A 1997-04-25 1998-04-24 Application and method for checking documents with effective optical diffraction security layer Revoked EP0978108B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19718916 1997-04-25
    DE19718916A DE19718916A1 (en) 1997-04-25 1997-04-25 Application and method for checking documents with diffractive optical security layers
    PCT/DE1998/001182 WO1998049655A2 (en) 1997-04-25 1998-04-24 Application and method for checking documents with effective optical diffraction security layer

    Publications (2)

    Publication Number Publication Date
    EP0978108A2 EP0978108A2 (en) 2000-02-09
    EP0978108B1 true EP0978108B1 (en) 2005-04-27

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    EP98932026A Revoked EP0978108B1 (en) 1997-04-25 1998-04-24 Application and method for checking documents with effective optical diffraction security layer

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    EP (1) EP0978108B1 (en)
    JP (2) JP2001524235A (en)
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    TR199902662T2 (en) 2000-02-21
    BG63811B1 (en) 2003-01-31
    CZ380099A3 (en) 2000-02-16
    HUP0002699A3 (en) 2004-09-28
    ES2241148T3 (en) 2005-10-16
    LV12423A (en) 2000-01-20
    HUP0002699A2 (en) 2000-12-28
    NO994726L (en) 1999-12-22
    RU2185662C2 (en) 2002-07-20
    JP2007242042A (en) 2007-09-20
    WO1998049655A2 (en) 1998-11-05
    PL336534A1 (en) 2000-07-03
    DE59812753D1 (en) 2005-06-02
    JP2001524235A (en) 2001-11-27
    LV12423B (en) 2000-05-20
    AU8208498A (en) 1998-11-24
    KR20010020271A (en) 2001-03-15
    BG103839A (en) 2000-04-28
    NO994726D0 (en) 1999-09-29
    BR9809776A (en) 2000-09-05
    CN1253648A (en) 2000-05-17
    PT978108E (en) 2005-09-30
    ATE294427T1 (en) 2005-05-15
    PL186435B1 (en) 2004-01-30
    CA2294303A1 (en) 1998-11-05
    WO1998049655A3 (en) 1999-02-04
    DE19718916A1 (en) 1998-10-29
    CZ294452B6 (en) 2005-01-12
    EP0978108A2 (en) 2000-02-09

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