WO2003071478A1 - Method and device for forge-proof marking or detection of objects - Google Patents

Method and device for forge-proof marking or detection of objects Download PDF

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Publication number
WO2003071478A1
WO2003071478A1 PCT/DE2003/000519 DE0300519W WO03071478A1 WO 2003071478 A1 WO2003071478 A1 WO 2003071478A1 DE 0300519 W DE0300519 W DE 0300519W WO 03071478 A1 WO03071478 A1 WO 03071478A1
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WIPO (PCT)
Prior art keywords
codes
coding
objects
codings
characters
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PCT/DE2003/000519
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German (de)
French (fr)
Inventor
Günther STAHL
Ralf Schimanski
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Barcodat Gmbh
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Publication date
Application filed by Barcodat Gmbh filed Critical Barcodat Gmbh
Priority to AU2003218874A priority Critical patent/AU2003218874A1/en
Publication of WO2003071478A1 publication Critical patent/WO2003071478A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06046—Constructional details
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/14—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being sensed by radiation

Definitions

  • the invention relates to a method for counterfeit-proof marking of objects by means of any coding.
  • the invention also relates to a device for detecting objects marked in this way with at least one light source, optical devices for shaping and aligning the light beam, and an evaluation device.
  • Bar codes or other linear codes as well as 2D codes or characters (letters, numbers or symbols) are known as optical codes.
  • Bar codes and corresponding reading devices are generally known and are used in a variety of ways for the identification or identification, in particular, of goods. Basically, such bar codes (and other encodings) can be imitated, but depending on the type of identification system, it can be recognized under certain circumstances that the encoding is imitation. However, there are areas of application where it is important to prevent simple copying of a bar code or other encodings from the outset. This can be of interest, for example, for the introduction of return systems, e.g.
  • a bar code arrangement is known from DE 42 10 698 A1, which consists of a plurality of bars arranged next to one another and having a different width. There, in order to be able to record a larger amount of information or the same amount of information in a smaller area on the same area, it is proposed to arrange several bar code arrangements in different colors one inside the other.
  • the present invention is therefore based on the object of proposing a possibility with which objects can be identified and also detected in a relatively forgery-proof manner with a coding, that is to say the effort for the forgery is relatively high.
  • this object is achieved by a method having the features of claim 1 and a device having the features of the device claim. It is also solved by coding according to the features of claim 8. Further advantageous refinements can be found in the respective subordinate claims.
  • the encodings can be linear or two-dimensional encodings.
  • Linear encodings are bar codes or encodings with other symbols or letters, hereinafter referred to as characters.
  • the individual codings are detected by means of a reading system corresponding to the optical properties and evaluated in an evaluation device.
  • a laser for example, which scans the coding with an appropriately prepared laser beam, or a CCD scanning system with corresponding optical properties can be used as the reading system.
  • the overlap of the characters of the coding thus represents the tamper-proof element, so that it is generally to be assumed that the characters and the coding will overlap to a large extent, if not completely. Due to the coding with different reflection properties, the coding can only be recognized with reading systems that are matched to it and can actually be read at all. Usual reading systems can be overlaid by at least two Codings no longer provide any information. The effort for the production of such superimposed codings is also considerable and difficult to implement, so that the hurdle for counterfeiting is set very high.
  • the codings are then successively detected and evaluated by means of the reading system, for example using a reading beam that is matched to the optical properties, for example a laser or CCD system.
  • the spatial position of the overlapping codes can be used as a further detection feature, regardless of the information content contained in the codes anyway.
  • the information content of the codes themselves can also be used for evaluation and checking for originality.
  • such codes can be applied directly to the objects or on a carrier material, such as adhesive strips.
  • a carrier material such as adhesive strips.
  • the codes are also on the front and the back of the carrier material and the overlap of the codes with respect to the reading beam must be understood.
  • the coding arranged on the back is then read through, the carrier material and the relative position to the coding read on the front is determined as an authenticity feature.
  • the differently polarized codes are detected by means of appropriately polarized reading systems. Such codes appear in the view with an unclean contour and cannot be detected with conventional reading devices.
  • the polarized properties result from light-diffractive microstructures that define the individual characters of the coding and have corresponding dependent polarizing properties. They are made one above the other without interfering with the detection. When viewed through a corresponding polarization filter, the one coding and the other the other coding become visible. In contrast, detection can also take place with little or diffuse light to holograms that need a strong and focused light. Such codes are particularly difficult and can only be copied with great effort. Counterfeiting by copying and scanning is not possible, since such encodings cannot be reproduced. In addition to the protection against forgery, such codes can also be applied in a very space-saving manner.
  • the inventive device for detecting the encodings comprises a device for scanning at least two at least partially overlapping : polarized encodings by means of a corresponding reading system.
  • a device for scanning at least two at least partially overlapping : polarized encodings by means of a corresponding reading system can have two corresponding light sources, for example laser sources, which generate the light corresponding to the optical properties.
  • a corresponding evaluation device can then additionally determine the position of the two overlapping codes on the basis of the signals received and check their correctness.
  • the device has a device for switching over the polarization plane of an illumination or scanning.
  • a correspondingly designed control device ensures that the device first scans one and then another or the other codings with corresponding optically adapted properties of the reading system.
  • the evaluation device advantageously compares the geometric positions of the individual codings with one another as an essential additional security feature.
  • Figure 1 is a schematic representation of a bar code, as in the
  • Figure 2 is a flowchart to explain the method and Figure 3 is a schematic representation of a device.
  • FIG. 1 shows a schematic representation of a first bar code 1 and a second bar code 2, which are polarized differently.
  • Reference number 3 denotes the visible result of the superimposed bar code, which resulted from the superimposition of the two bar codes 1 and 2 and is therefore unclear and undetectable. Bar codes 1 and 2 can only be recognized and detected by viewing them with an appropriate polarization filter.
  • FIG. 2 shows the schematic flow diagram in the form that the detection and evaluation of the first bar code takes place in block 4 and, for example, in
  • Block 7 is first cached, then in block 5 the
  • the respective bar codes can also contain information that is used for the authenticity check and, for example, establish a relationship from one bar code to another.
  • FIG. 3 shows the schematic view of a reading device 10, which has a light source, for example laser source 11, in a known manner.
  • the of The reading beam 16 emitted by the laser source 11 is shaped by means of an optical system 12 and deflected by means of a semitransparent mirror 13 to a rotating polygon mirror 15 and a bar code 17 is scanned with it.
  • the received signals are forwarded from the polygon mirror 15 to the receiver 14 with a corresponding evaluation device.
  • the optical devices include a device familiar to the person skilled in the art, with which various polarization filters are introduced into the light beam 16. These can either be inserted individually into the light beam or can also be arranged on a corresponding disk. In principle, all measures known to those skilled in the art for beam shaping and for introducing various filters can be provided here. Of course, it is also possible to use two light sources with different optical properties instead of one light source.

Abstract

The invention relates to a method for the forge-proof marking of objects by means of a coding, such as a linear code or a two-dimensional code in the form of a bar code or character code. According to the invention, at least two codes exhibiting different polarisation properties are arranged on the objects or on a support material, overlapping at least partially. The individual codes are detected by means of a reading system corresponding to the optical characteristics and are evaluated in an evaluation device. The invention also relates to a device for carrying out said method in addition to a coding. The invention further relates to a relatively forge-proof option of marking items, said items being marked by codes.

Description

Verfahren und Vorrichtung zum fälschungssicheren Kennzeichnen bzw. Method and device for counterfeit-proof marking or
Detektieren von GegenständenDetect objects
Beschreibungdescription
Die Erfindung betrifft ein Verfahren zum fälschungssicheren Kennzeichnen von Gegenständen mittels beliebigen Kodierungen. Die Erfindung betrifft außerdem eine Vorrichtung zum Detektieren von derart gekennzeichneten Gegenständen mit mindestens einer Lichtquelle, optischen Einrichtungen zur Formung und Ausrichtung des Lichtstrahls sowie eine Auswerteeinrichtung.The invention relates to a method for counterfeit-proof marking of objects by means of any coding. The invention also relates to a device for detecting objects marked in this way with at least one light source, optical devices for shaping and aligning the light beam, and an evaluation device.
Als optische Kodierungen sind Strichcodes oder andere lineare Kodierungen sowie 2D-Codes oder auch Schriftzeichen (Buchstaben, Zahlen oder Symbole) bekannt. Strichcodes und entsprechende Lesevorrichtungen sind allgemein bekannt und werden in vielfältiger Art und Weise zur Kennzeichnung bzw. Identifizierung insbesondere von Waren benutzt. Grundsätzlich können derartige Strichcodes (und andere Kodierungen) nachgemacht werden, wobei jedoch je nach Art des Identifizierungssystems aufgrund der in der Kodierung enthaltenen Information unter Umständen erkannt werden kann, dass es sich um eine nachgemachte Kodierung handelt. Es gibt jedoch Anwendungsbereiche, wo es wichtig ist, dass von vornherein ein einfaches Kopieren eines Strichcodes oder anderer Kodierungen verhindert werden soll. Dies kann beispielsweise für die Einführung von Rückgabesystemen von Interesse sein, beispielsweise Pfandflaschen, um zu verhindern, dass die bereits ohne Pfand im umlaufenden Waren nachträglich mit einer entsprechenden Kodierung versehen werden, um in den Genuss des Pfandes zu gelangen, obwohl für diese Flaschen kein Pfand bezahlt wurde. Bei eine entsprechenden Anzahl von Einheiten kann sich die Fälschung der Kodierung lohnen. So sind eine Vielzahl von Anwendungsfällen denkbar, bei denen sichergestellt werden muss, dass nicht ohne weiteres, d.h. mit relativ geringem Aufwand, eine Fälschung bzw. ein Kopieren der Kodierung möglich ist.Bar codes or other linear codes as well as 2D codes or characters (letters, numbers or symbols) are known as optical codes. Bar codes and corresponding reading devices are generally known and are used in a variety of ways for the identification or identification, in particular, of goods. Basically, such bar codes (and other encodings) can be imitated, but depending on the type of identification system, it can be recognized under certain circumstances that the encoding is imitation. However, there are areas of application where it is important to prevent simple copying of a bar code or other encodings from the outset. This can be of interest, for example, for the introduction of return systems, e.g. deposit bottles, in order to prevent that those already in circulation without a deposit are subsequently provided with a corresponding code in order to benefit from the deposit, although there is no deposit for these bottles was paid. With a corresponding number of units, the falsification of the coding can be worthwhile. A large number of applications are conceivable in which it must be ensured that it is not possible to forge or copy the coding easily, ie with relatively little effort.
Aus der DE 42 10 698 A1 ist eine Strichcode-Anordnung bekannt, welche aus einer Mehrzahl von nebeneinander angeordneten, eine unterschiedliche Breite aufweisenden Strichen besteht. Dort wird vorgeschlagen, um auf der gleichen Fläche eine größere Informationsmenge oder die gleiche Informationsmenge auf einer kleineren Fläche schriftlich festhalten zu können, mehrere Strichcode- Anordnungen in unterschiedlicher Farbe ineinander anzuordnen.A bar code arrangement is known from DE 42 10 698 A1, which consists of a plurality of bars arranged next to one another and having a different width. There, in order to be able to record a larger amount of information or the same amount of information in a smaller area on the same area, it is proposed to arrange several bar code arrangements in different colors one inside the other.
Aus der CH 495 585 ist bekannt, einen fotolumjneszierenden Strichcode zu verwenden, bei dem unterschiedliche Strichcodes mit verschiedenen fotolumineszierenden Komponenten in einander geschrieben sind. Dazu werden die Striche im gleichen Abstand angeordnet jedoch etwas gegeneinander versetzt, so dass maximale Überlappungsbereiche von weniger als 50 % vorhanden sind. Diese Überlappung kann nur so weit toleriert werden, solange die erzeugte Fotolumineszensstrahlung für eine zuverlässige Wahrnehmung ausreicht. Eine vollständige Überlagerung der Striche kann daher auf keinen Fall zugelassen werden, da dies keine Detektierung der darunter liegenden Fotolumineszenzschicht gestattet. Auch diese Anordnung dient im Wesentlichen dem Zweck, eine größere Informationsmenge auf gleichem Raum unterzubringen. Derartige farblich unterschiedliche Strichcodes sind jedoch nicht geeignet, um eine ausreichende Fälschungssicherheit zu gewährleisten.From CH 495 585 it is known to use a photoluminescent bar code in which different bar codes with different photoluminescent components are written in one another. For this purpose, the lines are arranged at the same distance but slightly offset from each other, so that there are maximum overlap areas of less than 50%. This overlap can only be tolerated to the extent that the photoluminescent radiation generated is sufficient for reliable perception. A complete overlaying of the lines can therefore not be permitted under any circumstances, since this does not allow the detection of the underlying photoluminescent layer. This arrangement also essentially serves the purpose of accommodating a larger amount of information in the same space. Such bar codes of different colors are not suitable, however, in order to ensure adequate security against forgery.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Möglichkeit vorzuschlagen, mit der Gegenstände relativ fälschungssicher mit einer Kodierung gekennzeichnet und auch detektiert werden können, das heißt der Aufwand für die Fälschung ist relativ hoch.The present invention is therefore based on the object of proposing a possibility with which objects can be identified and also detected in a relatively forgery-proof manner with a coding, that is to say the effort for the forgery is relatively high.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren mit den Merkmalen des Anspruchs 1 sowie einer Vorrichtung mit den Merkmalen des Vorrichtungsanspruchs gelöst. Sie wird außerdem durch eine Kodierung gemäß den Merkmalen des Anspruchs 8 gelöst. Weitere vorteilhafte Ausgestaltungen sind den jeweiligen rückbezogenen Unteransprüchen zu entnehmen.According to the invention, this object is achieved by a method having the features of claim 1 and a device having the features of the device claim. It is also solved by coding according to the features of claim 8. Further advantageous refinements can be found in the respective subordinate claims.
Gemäß dem Verfahren werden auf den Gegenständen oder einem Trägermaterial mindestens zwei verschieden polarisierte Kodierungen angeordnet, deren Zeichen zumindest teilweise überlappen. Bei den Kodierungen kann es sich, wie bereits erwähnt, um lineare oder zweidimensionale Kodierungen handeln. Lineare Kodierungen sind Strichcodes oder Kodierungen mit anderen Symbolen oder Buchstaben, im Nachfolgenden zusammenfassen Zeichen genannt. Die einzelnen Kodierungen werden mittels eines, den optischen Eigenschaften entsprechenden Lesesystems detektiert und in einer Auswerteeinrichtung ausgewertet. Als Lesesystem kann beispielsweise ein Laser, der mit einem entsprechend aufbereiteten Laserstrahl die Kodierung abtastet, oder ein CCD-Scansystem mit entsprechenden optischen Eigenschaften verwendet werden. Die Überlappungen der Zeichen der Kodierungen stellt damit das fälschungssichere Element dar, so dass in der Regel von einer weitgehenden, wenn nicht sogar vollständigen Überlappung der Zeichen und der Kodierungen auszugehen ist. Durch die Kodierungen mit unterschiedlichen Reflexionseigenschaften, können die Kodierungen nur mit entsprechend darauf abgestimmten Lesesystemen erkannt und tatsächlich überhaupt gelesen werden. Übliche Lesesysteme können durch die Überlagerung von mindestens zwei Kodierungen keine Aussage mehr liefern. Der Aufwand für die Herstellung derartiger überlagerter Kodierungen ist ebenfalls erheblich und schwierig zu realisieren, so dass die Hürde für eine Fälschung sehr hoch gelegt wird. Die Kodierungen werden dann nacheinander mittels des Lesesystems, beispielsweise mit einem auf die optischen Eigenschaften abgestimmten Lesestrahls z.B. Laser oder CCD-System, detektiert und ausgewertet. Hierbei kann einerseits die räumliche Lage der sich überlappenden Kodierungen als weiteres Detektierungsmerkmal, unabhängig von dem ohnehin in den Kodierungen enthaltenen Informationsgehalt verwendet werden. Auch der Informationsgehalt der Kodierungen selbst kann zur Auswertung und Überprüfung auf Originalität herangezogen werden.According to the method, at least two differently polarized codings are arranged on the objects or on a carrier material, the characters of which overlap at least partially. As already mentioned, the encodings can be linear or two-dimensional encodings. Linear encodings are bar codes or encodings with other symbols or letters, hereinafter referred to as characters. The individual codings are detected by means of a reading system corresponding to the optical properties and evaluated in an evaluation device. A laser, for example, which scans the coding with an appropriately prepared laser beam, or a CCD scanning system with corresponding optical properties can be used as the reading system. The overlap of the characters of the coding thus represents the tamper-proof element, so that it is generally to be assumed that the characters and the coding will overlap to a large extent, if not completely. Due to the coding with different reflection properties, the coding can only be recognized with reading systems that are matched to it and can actually be read at all. Usual reading systems can be overlaid by at least two Codings no longer provide any information. The effort for the production of such superimposed codings is also considerable and difficult to implement, so that the hurdle for counterfeiting is set very high. The codings are then successively detected and evaluated by means of the reading system, for example using a reading beam that is matched to the optical properties, for example a laser or CCD system. On the one hand, the spatial position of the overlapping codes can be used as a further detection feature, regardless of the information content contained in the codes anyway. The information content of the codes themselves can also be used for evaluation and checking for originality.
Grundsätzlich können derartige Kodierungen direkt auf den Gegenständen oder auf einem Trägermaterial, wie beispielsweise Klebestreifen, aufgebracht werden. Letzteres ist häufig der Fall, so dass gemäß einer weiteren bevorzugten Ausführungsform sich die Kodierungen auch auf der Vorder- und der Rückseite des Trägermaterials befinden und die Überlappung der Kodierungen in Bezug auf den Lesestrahl verstanden werden muss. Mit einem entsprechend geeignetem Lesesystem wird dann die auf der Rückseite angeordnete Kodierung durch, das Trägermaterial hindurch gelesen und seihe relative Position zu der auf der Vorderseite gelesenen Kodierung als Echtheitsmerkmal ermittelt.In principle, such codes can be applied directly to the objects or on a carrier material, such as adhesive strips. The latter is often the case, so that, according to a further preferred embodiment, the codes are also on the front and the back of the carrier material and the overlap of the codes with respect to the reading beam must be understood. With a correspondingly suitable reading system, the coding arranged on the back is then read through, the carrier material and the relative position to the coding read on the front is determined as an authenticity feature.
Die unterschiedlich polarisierten Kodierungen werden mittels entsprechend polarisierten Lesesystemen detektiert. Derartige Kodierungen erscheinen in der Ansicht mit einer unsauberen Kontur und sind mit üblichen Lesegeräten nicht zu detektieren. Die polarisierten Eigenschaften ergeben sich durch lichtbeugende MikroStrukturen, die die einzelnen Zeichen der Kodierung definieren und entsprechende abhängige polarisierende Eigenschaften haben. Sie werden übereinander hergestellt, ohne sich bei der Detektierung zu stören. Bei der Betrachtung durch ein entsprechendes Polarisationsfilter wird das eine Mal die eine Kodierung und das andere Mal die andere Kodierungen sichtbar. Eine Detektierung kann auch bei wenigem oder diffusem Licht erfolgen, im Gegensatz zu Hologrammen, die ein starkes und gebündeltes Licht benötigen. Derartige Kodierungen sind besonders schwierig und nur mit großem Aufwand nachzumachen. Eine Fälschung durch Kopieren und Scannen ist nicht möglich, da derartige Kodierungen dann nicht reproduziert werden können. Neben der Fälschungssicherheit können derartige Kodierungen auch sehr platzsparend aufgebracht werden.The differently polarized codes are detected by means of appropriately polarized reading systems. Such codes appear in the view with an unclean contour and cannot be detected with conventional reading devices. The polarized properties result from light-diffractive microstructures that define the individual characters of the coding and have corresponding dependent polarizing properties. They are made one above the other without interfering with the detection. When viewed through a corresponding polarization filter, the one coding and the other the other coding become visible. In contrast, detection can also take place with little or diffuse light to holograms that need a strong and focused light. Such codes are particularly difficult and can only be copied with great effort. Counterfeiting by copying and scanning is not possible, since such encodings cannot be reproduced. In addition to the protection against forgery, such codes can also be applied in a very space-saving manner.
Die erfindungsgemäße ausgestaltete Vorrichtung zum Detektieren der Kodierungen umfasst eine Einrichtung zum Abtasten von mindestens zwei sich mindestens teilweise überlappenden : polarisierten Kodierungen mittels eines entsprechenden Lesesystems. Eine derartige Einrichtung kann beispielsweise im Falle von zwei unterschiedlichen überlagerten Kodierungen zwei entsprechende Lichtquellen, beispielsweise Laserquellen aufweisen, die das den optischen Eigenschaften entsprechende Licht erzeugen. Es ist jedoch auch möglich, nur eine Lichtquelle zu verwenden, und den Lesestrahl durch entsprechende geeignete optische Mittel wechselweise umzuformen, um nacheinander die beiden überlappenden Kodierungen zu detektieren. Eine entsprechende Auswerteeinrichtung kann dann zusätzlich aufgrund der erhaltenen Signale die Position der beiden sich überlappenden Kodierungen ermitteln und auf deren Richtigkeit überprüfen. Gemäß einer bevorzugten Ausführungsform weist die Vorrichtung eine Einrichtung zur Umschaltung der Polarisationsebene einer Ausleuchtung oder Abtastung auf. Eine entsprechend ausgestaltete Steuereinrichtung sorgt dafür, dass die Einrichtung zuerst den einen und anschließend die eine andere oder die anderen Kodierungen mit entsprechend optisch angepassten Eigenschaften des Lesesystems abtastet. Vorteilhafter Weise vergleicht die Auswerteeinrichtung die geometrischen Positionen der einzelnen Kodierungen zueinander als wesentliches zusätzliches Sicherheitsmerkmal .The inventive device for detecting the encodings comprises a device for scanning at least two at least partially overlapping : polarized encodings by means of a corresponding reading system. In the case of two different superimposed codings, such a device can have two corresponding light sources, for example laser sources, which generate the light corresponding to the optical properties. However, it is also possible to use only one light source and to alternately reshape the reading beam using suitable optical means in order to successively detect the two overlapping codes. A corresponding evaluation device can then additionally determine the position of the two overlapping codes on the basis of the signals received and check their correctness. According to a preferred embodiment, the device has a device for switching over the polarization plane of an illumination or scanning. A correspondingly designed control device ensures that the device first scans one and then another or the other codings with corresponding optically adapted properties of the reading system. The evaluation device advantageously compares the geometric positions of the individual codings with one another as an essential additional security feature.
Nachfolgend wird die Erfindung beispielhaft an einer bevorzugten Kodierung, dem Strichcode, in Verbindung mit den begleitenden Zeichnungen näher erläutert. Es stellen dar: Figur 1 die schematische Darstellung eines Strichcodes, wie er bei demThe invention is explained in more detail below using a preferred coding, the bar code, in conjunction with the accompanying drawings. They represent: Figure 1 is a schematic representation of a bar code, as in the
Verfahren Anwendung findet; Figur 2 ein Flussdiagram zur Erläuterung des Verfahrens und Figur 3 die schematische Darstellung einer Vorrichtung.Procedure applies; Figure 2 is a flowchart to explain the method and Figure 3 is a schematic representation of a device.
Figur 1 zeigt in schematischer Darstellung einen ersten Strichcode 1 und einen zweiten Strichcode 2, die unterschiedlich polarisiert sind. Mit der Bezugsziffer 3 ist das sichtbare Ergebnis des überlagerten Strichcodes bezeichnet, der aus der Überlagerung der beiden Strichcodes 1 und 2 entstanden und damit unklar und nicht detektierbar ist. Erst durch die Betrachtung mit einem entsprechenden Polarisationsfilter können die Strichcodes 1 und 2 erkannt und detektiert werden.FIG. 1 shows a schematic representation of a first bar code 1 and a second bar code 2, which are polarized differently. Reference number 3 denotes the visible result of the superimposed bar code, which resulted from the superimposition of the two bar codes 1 and 2 and is therefore unclear and undetectable. Bar codes 1 and 2 can only be recognized and detected by viewing them with an appropriate polarization filter.
Figur 2 zeigt das schematische Flussdiagramm in der Form, dass im Block 4 die Erfassung und Auswertung des ersten Strichcodes erfolgt und beispielsweise imFIG. 2 shows the schematic flow diagram in the form that the detection and evaluation of the first bar code takes place in block 4 and, for example, in
Block 7 zuerst einmal zwischengespeichert wird, anschließend in dem Block 5 dieBlock 7 is first cached, then in block 5 the
Erfassung und Auswertung des zweiten Strichcodes erfolgt und das Ergebnis ebenfalls im Block 7 zwischengespeichert wird. Im darauffolgenden Block 6 erfolgt in einer dritten Stufe die Auswertung der geometrischen Positionen de beiden erfassten Strichcodes im anschließenden mit Bezugsziffer 7 bezeichnetenDetection and evaluation of the second bar code takes place and the result is also buffered in block 7. In the subsequent block 6, the geometric positions of the two detected bar codes are evaluated in a third stage, which is subsequently designated by reference number 7
Block. Im Anschluss daran erfolgt die Prüfung der Echtheit, d.h. die Überprüfung des Vorhandenseins der Strichcodes sowie des Informationsgehalts und dieBlock. The authenticity is then checked, i.e. the verification of the presence of the bar codes and the information content and the
Überprüfung darauf, ob die in geometrische Position der beiden Strichcodes zueinander als korrekt ermittelt wird. Im Anschluss daran werden die entsprechenden Ergebnisse ausgegeben bzw. weiterverarbeitet.Check whether the geometrical position of the two bar codes relative to one another is determined to be correct. The corresponding results are then output or processed.
Zusätzlich können auch noch in den jeweiligen Strichcodes Informationen enthalten sein, die zur Echtheitsprüfung verwendet werden und beispielsweise einen Bezug von einem Strichcode zum anderen herstellen.In addition, the respective bar codes can also contain information that is used for the authenticity check and, for example, establish a relationship from one bar code to another.
Figur 3 zeigt die schematische Ansicht einer Leseeinrichtung 10, die in bekannter Art und Weise eine Lichtquelle, beispielsweise Laserquelle 11 aufweist. Der von der Laserquelle 11 ausgesandte Lesestrahl 16 wird mittels eines optischen Systems 12 geformt und mittels eines halbdurchlässigen Spiegels 13 zu einem sich drehenden Polygonspiegel 15 umgelenkt und mit diesem einen Strichcode 17 abgetastet. Die empfangenen Signale werden von dem Polygonspiegel 15 zu dem Empfänger 14 mit einer entsprechenden Auswerteeinrichtung weitergeleitet. In dem Ausführungsbeispiel beinhalten die optischen Einrichtungen eine dem Fachmann geläufige Einrichtung, mit der verschiedene Polarisationsfilter in den Lichtstrahl 16 eingebracht werden. Diese können entweder einzeln in den Lichtstrahl eingeschoben oder auch auf einer entsprechenden Scheibe angeordnet sein. Grundsätzlich können hier alle dem Fachmann geläufigen Maßnahmen zur Strahlformung und zum Einbringen von verschiedenen Filter vorgesehen sein. Selbstverständlich ist es auch möglich, anstelle einer Lichtquelle zwei Lichtquellen mit unterschiedlichen optischen Eigenschaften zu verwenden. FIG. 3 shows the schematic view of a reading device 10, which has a light source, for example laser source 11, in a known manner. The of The reading beam 16 emitted by the laser source 11 is shaped by means of an optical system 12 and deflected by means of a semitransparent mirror 13 to a rotating polygon mirror 15 and a bar code 17 is scanned with it. The received signals are forwarded from the polygon mirror 15 to the receiver 14 with a corresponding evaluation device. In the exemplary embodiment, the optical devices include a device familiar to the person skilled in the art, with which various polarization filters are introduced into the light beam 16. These can either be inserted individually into the light beam or can also be arranged on a corresponding disk. In principle, all measures known to those skilled in the art for beam shaping and for introducing various filters can be provided here. Of course, it is also possible to use two light sources with different optical properties instead of one light source.

Claims

Patentansprüche claims
1. Verfahren zum fälschungssicheren Kennzeichnen von Gegenständen mittels einer Kodierung, wobei auf den Gegenständen oder einem1. Method for counterfeit-proof marking of objects by means of a coding, being on the objects or a
Trägermaterial mindestens zwei Kodierungen (1 , 2) angeordnet werden, die mittels eines entsprechenden Lesesystems (16) detektiert und in einer Auswerteeinrichtung (14) ausgewertet werden, dadurch gekennzeichnet, dass die Zeichen der Kodierungen zumindest teilweise überlappend und mit unterschiedlichenCarrier material at least two codes (1, 2) are arranged, which are detected by means of a corresponding reading system (16) and evaluated in an evaluation device (14), characterized in that the characters of the codes overlap at least partially and with different
Polarisationseigenschaften aufgebracht werden.Polarization properties are applied.
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, dass die Kodierungen (1 , 2) auf einer Seite oder auf der Vorder- und Rückseite des Trägermaterials angeordnet werden.2. The method according to claim 1, characterized in that the codings (1, 2) are arranged on one side or on the front and back of the carrier material.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Positionen der überlappenden Kodierungen (1 , 2) zueinander erfasst und ausgewertet wird.3. The method according to claim 1 or 2, characterized in that the positions of the overlapping codes (1, 2) to each other is detected and evaluated.
4. Vorrichtung zum Detektieren von gemäß Anspruch 1 hergestellten Kodierungen mit mindestens einer Lichtquelle, optischen Einrichtungen zur Formung und Ausrichtung des Lichtstahls bzw. Ausleuchtung sowie einer Auswerteeinrichtung, gekennzeichnet durch eine Einrichtung (15) zum Abtasten von mindestens zwei sich bezüglich ihrer Zeichen mindestens teilweise überlappenden Kodierungen (1 , 2) mit unterschiedlichen Polarisationseigenschaften .4. Device for detecting codings produced according to claim 1 with at least one light source, optical devices for shaping and aligning the light steel or illumination as well as an evaluation device, characterized by a device (15) for scanning at least two codes (1, 2) with different polarization properties that at least partially overlap with respect to their characters.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die Einrichtung zum Abtasten (15) Mittel zur Umschaltung der Polarisationsebene des Lesesystems aufweist.5. The device according to claim 4, characterized in that the device for scanning (15) has means for switching the polarization plane of the reading system.
6. Vorrichtung nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Einrichtung zum Abtasten (15) zuerst die eine und anschließend den oder die andere Kodierung abtastet.6. The device according to claim 4 or 5, characterized in that the means for scanning (15) first scans one and then the other coding.
7. Vorrichtung nach einem der vorangegangenen Ansprüche 4 bis 6,, dadurch gekennzeichnet, dass die Auswerteeinrichtung (14) die geometrischen Positionen der einzelnen Kodierungen vergleicht.7. Device according to one of the preceding claims 4 to 6, characterized in that the evaluation device (14) compares the geometric positions of the individual codes.
8. Kodierung, dadurch gekennzeichnet, dass sie aus mindestens zwei unterschiedlich polarisierten Kodierungen (1 , 2), deren Zeichen mindestens sich teilweise überlappend zueinander angeordnet sind, besteht. 8. Coding, characterized in that it consists of at least two differently polarized codings (1, 2), the characters of which are at least partially overlapping with one another.
PCT/DE2003/000519 2002-02-19 2003-02-19 Method and device for forge-proof marking or detection of objects WO2003071478A1 (en)

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WO2010149155A2 (en) 2009-06-25 2010-12-29 Bpe E. K. Method for marking objects by means of codes in the form of micro- and/or nano-sized structures
AT518802A1 (en) * 2016-07-05 2018-01-15 Ait Austrian Inst Tech Gmbh Method for determining the relative position of a UV-luminescent feature on a non-UV-luminescent carrier

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GB1228388A (en) * 1967-09-07 1971-04-15
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WO2000029878A1 (en) * 1998-11-13 2000-05-25 Rolic Ag Optical component
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Publication number Priority date Publication date Assignee Title
WO2010149155A2 (en) 2009-06-25 2010-12-29 Bpe E. K. Method for marking objects by means of codes in the form of micro- and/or nano-sized structures
AT518802A1 (en) * 2016-07-05 2018-01-15 Ait Austrian Inst Tech Gmbh Method for determining the relative position of a UV-luminescent feature on a non-UV-luminescent carrier

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