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EP1697146A2 - Data support with identifications written thereon by means of a laser beam and method for production thereof - Google Patents

Data support with identifications written thereon by means of a laser beam and method for production thereof

Info

Publication number
EP1697146A2
EP1697146A2 EP04803402A EP04803402A EP1697146A2 EP 1697146 A2 EP1697146 A2 EP 1697146A2 EP 04803402 A EP04803402 A EP 04803402A EP 04803402 A EP04803402 A EP 04803402A EP 1697146 A2 EP1697146 A2 EP 1697146A2
Authority
EP
European Patent Office
Prior art keywords
data carrier
markings
recording layer
carrier according
laser
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04803402A
Other languages
German (de)
French (fr)
Other versions
EP1697146B1 (en
Inventor
Matthias Bergmann
Günter Endres
Georg Kruse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Mobile Security GmbH
Original Assignee
Giesecke and Devrient GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34672782&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1697146(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
Publication of EP1697146A2 publication Critical patent/EP1697146A2/en
Application granted granted Critical
Publication of EP1697146B1 publication Critical patent/EP1697146B1/en
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • B42D2033/24—

Definitions

  • the invention relates to a data carrier in which markings in the form of patterns, letters, numbers and / or images are introduced by a laser beam, which are visible due to local changes in the optical properties of the data carrier caused by the laser beam and resulting from material conversions.
  • ID cards such as ID cards, credit cards, bank cards and the like
  • ID cards are being used to an increasing extent in various service sectors, but also in the internal area.
  • the large number of types of ID cards available is testimony to the numerous efforts and the various suggestions as to how these conflicting requirements can be combined in a suitable manner.
  • a multilayer identification card is known from the German patent DE 31 51 407 CI, which is equipped with a plastic film as the recording medium.
  • the plastic film appears completely transparent in the visible wavelength range, but absorbs so strongly at the wavelength of an infrared laser used to write information that the film is locally blackened by the action of the laser beam. This allows images and / or data to be written into the plastic film with good resolution.
  • the ID card of DE 31 51 407 CI offers a high level of security against forgery, there is a need to expand the visual design options of such cards and to further complicate the forgery or forgery of the cards by introducing new or additional security features.
  • Another difficulty is that visual inspection of a hologram requires good lighting conditions. Even with the diffuse room lighting prevailing in banks, shops or companies, the holographic effects are often difficult or impossible to detect. Even with so-called decoration materials, metallic reflective or slightly iridescent surfaces are generated, so that the structures formed with such decoration materials can be confused with real holograms by laypersons under unfavorable lighting conditions.
  • the object of the invention is to expand the visual design options of a laser-inscribed data carrier, and in particular to incorporate features which are not reproducible photographically or xerographically and which can be recognized even under unfavorable lighting conditions.
  • a generic data carrier comprises a laser-sensitive recording layer which is transparent in the visible spectral range and which is provided with a surface relief in the form of a lenticular screen.
  • the markings are introduced into the recording layer with the laser beam from different directions through the lenticular grid and are recognizable when viewed from the same directions.
  • the data carrier is transparent, at least in the area of the introduced markings.
  • the markings are introduced through the lenticular screen into the underlying recording layer.
  • the laser beam is held at different, predetermined angles to the plane of the lens grid, so that when the laser radiation passes through the lenses, different areas of the recording layer are modified, usually blackened.
  • the markings introduced in this way can essentially only be recognized from the angle at which they were introduced.
  • the size of the angular range under which an identification is visible depends on the size of the modified area and can be set, for example, via the pulse energy of the laser beam.
  • the data carrier can thus be provided with two or more different markings which cannot be reproduced photographically or xerographically, since the entire information written in can never be recognized from a certain viewing angle.
  • the markings visible due to the local changes in the optical properties of the data carrier may be additionally or exclusively recognizable in transmitted light, i.e. regardless of whether you are viewing the front or back or only when viewing from one side.
  • the laser beam can, for example, also cause a local change in the refractive index or a change in the polarization direction of the transparent recording layer, so that the inscribed identification in reflected light, that is to say when viewed from the front ( Lens side) is practically invisible.
  • Visually appealing authenticity features can thus be introduced into data carriers which, together with the preferably specific information content, give it a high degree of security against forgery.
  • the lenticular grid comprises cylindrical lenses and / or spherical lenses.
  • the axis of the cylindrical lenses can be straight or swing, parallel or at a certain angle to the outer edges of the disk.
  • the drawing layer can be part of a transparent main body of the data carrier or alternatively can be formed by a separate layer.
  • the recording layer is formed according to a further development of the invention by a non-self-supporting layer with a thickness of particularly preferably from approximately 1 ⁇ m to approximately 50 ⁇ m, for example a plastic film made of polycarbonate or polyester doped at least in some areas.
  • the drawing layer is preferably arranged in the interior of the data carrier.
  • the thickness of the layer depends, among other things, on the material, the lens geometry and the type of application and preferably varies between 1 to 800 ⁇ m.
  • the layer can consist of PVC, PC, polyester and compounds thereof.
  • the markings can include personal data, such as a signature, a date of birth, a portrait or the like, but also or additionally, data relating to a data carrier, such as a period of validity, a card number, details of the issuing authority or institute or the like.
  • Rasterized markings are particularly suitable for laser inscription, the raster elements preferably being formed by rod-shaped pixels. The individual raster elements can then be generated in a controlled manner by pulsed irradiation of the recording layer, for example with an Nd: Y AG laser, an Nd: glass laser or even a longer-wave CO 2 laser.
  • the identifications recognizable from different directions are expediently nested in the recording layer.
  • the information content is separated from the viewing directions corresponding to the recording directions, since the lenticular screen shows the viewer only the part of the markings assigned to the viewing direction. This makes it practically impossible to reproduce the information written in the printing process, since precise alignment with a later applied lens grid is not possible with the required accuracy.
  • the drawing layer and the lens grid are arranged in or on a transparent main body of the data carrier.
  • the data carrier can of course have further black and white or colored imprints and / or further laser inscriptions.
  • the data carrier can also be provided with one or more further security features, in particular luminescent, magnetic or electrical substances, or optically variable structures, such as holographic structures.
  • the transparent recording layer is integrated into the main body as an implant or as part of a transparent implant.
  • it makes sense to physically link the implant to the main body.
  • This is possible, for example, by means of a lenticular grid which is larger than the transparent implant and at least partially overlaps the implant like the main body.
  • the implant and the main body each have a recording layer, which adjoin one another, for example, so that the implant and card body are inseparably connected with one and the same personalization, for example an image.
  • it is a banknote which is equipped on the one hand with the recording layer according to the invention with a lenticular screen and on the other hand has a specific printed image.
  • the drawing layer with a lenticular grid and the printed image are arranged on the banknote in such a way that they can be folded over one another and the marks inscribed in the drawing layer complement the printed image to provide overall information.
  • the data carrier preferably represents a document of value, such as a banknote, an identification card or the like.
  • the data carrier represents a security element for application to a document of value, such as a banknote, an identification card or the like.
  • the invention also includes a document of value, such as a bank note, identity card or the like, with a document substrate of value with a window area or hole which is covered on one side or on both sides with a security element of the type mentioned. Since the security element is transparent according to the invention, the inscriptions can be read through the window area or the hole in the security in transmitted light.
  • a document of value such as a bank note, identity card or the like
  • the laser-sensitive recording layer which is transparent in the visible spectral range, is first provided with the surface relief in the form of a lens grid and subsequently the markings with the laser beam are passed through the lens grid from different directions in a transparent area of the data carrier the on the drawing layer brings so that the markings can be seen from the same directions when looking at the data medium later.
  • the markings are preferably introduced in a raster process, the raster elements preferably being formed by rod-shaped pixels. Pulsed laser radiation is particularly well suited for generating such raster elements.
  • FIG. 1 is a plan view of a transparent identification card according to an embodiment of the invention in a schematic representation
  • Fig. 2 is a sectional view of the ID card of Fig. 1 along the line II-II, and
  • FIG. 3 shows a section through a banknote with a punched-out opening, which is covered with a security element according to an exemplary embodiment of the invention.
  • the identification card 10 contains a portrait 12 of the cardholder and further personal data 14, in Example of the first and last name of the owner.
  • the identity card can contain further data 16, such as date of birth, nationality, issuing authority, date of issue and the like.
  • a laser tilt image is arranged in a partial area 18 of the identification card 10 and contains two different pieces of information, which are inscribed by means of a laser beam, in the exemplary embodiment the signature of the holder 20 and the date of validity of the card 22.
  • the two pieces of information 20 and 22 cannot be recognized when looking at the identification card 10 at the same time, but only by tilting the card 10 at a different tilt angle.
  • the identification card 10 contains a transparent card body 24 and a laser-sensitive recording layer 26 which is also transparent in the visible spectral range.
  • the recording layer 26 can be a partial area of the card body 24 or a separate layer.
  • the drawing layer 26 is provided with a surface relief in the form of a lenticular grid 28, which in the exemplary embodiment consists of a plurality of parallel cylindrical lenses.
  • the personal information 20 and 22 introduced into the laser tilt image is only written into the recording layer 26 after the lens grid 28 has been applied by means of a pulsed infrared laser.
  • the laser beam is directed from different directions 30 and 32 onto the lens grid 28.
  • the individual cylindrical lenses focus the lens Depending on the direction of irradiation, the beam of light strikes different small subregions 34 or 36 of the recording layer.
  • the optical properties of the recording layer 26 are changed locally by the action of the laser radiation, for example the layer is locally blackened.
  • the blackened sub-areas 34 can be seen precisely because of the focusing effect of the cylindrical lenses, which are composed for the viewer to form an image, in the exemplary embodiment of the inscription 20 inscribed.
  • the partial areas 36 inscribed from this direction can be seen from the viewing direction 32 and compose an image of the validity date 22 for the viewer.
  • the identification card 10 can have additional layers, for example one or more protective layers or functional layers provided with other security elements. It is only necessary to maintain the transparency of the data carrier 10 in the area of the inscribed markings 20, 22. These further layers are not essential for the present invention and are therefore neither shown in the figures nor described in detail.
  • FIG. 3 shows a bank note 40 with a continuous punched opening 42.
  • the opening 42 is completely covered on the front side of the banknote 40 with a transparent security element 44 according to the invention.
  • the security element 44 has a transparent main body 46 and a recording layer 48 which is transparent in the visible spectral range and into which, as described above, information was written by means of a laser beam which, for example, contains a serial number of the bank note.
  • the recording layer 48 is covered by a lenticular grid 50, which in the exemplary embodiment consists of a plurality of spherical lenses which are embossed into the transparent main body 46.
  • the recording layer 48 Due to the effect of the laser radiation, the recording layer 48 is blackened in some places, while the remaining areas of the recording layer 48 remain transparent.
  • the registered serial number can therefore be read from the corresponding viewing direction both from above and through the opening 42 of the banknote 40 from the back.
  • the tilting effect disappears when the banknote is reproduced photographically or xerographically.
  • the laser radiation can also be used only for a local change in the refractive index or the direction of polarization of the recording layer. This further complicates an adjustment of the security element 44.

Landscapes

  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Holo Graphy (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

The invention relates to a data carrier into which, by a laser beam, identifiers (20, 22) are introduced in the form of patterns, letters, numbers and/or images that are visible due to local changes in the optical properties of the data carrier, effected by the laser beam and resulting from material transformations. According to the present invention, the data carrier comprises a laser-sensitive recording layer (26) that is transparent in the visible spectral range and that is provided with a surface relief in the form of a lens grid (28). The identifiers are introduced with the laser beam from different directions through the lens grid (28) into the recording layer (26) and are perceptible when later viewed from those same directions. The data carrier is transparent at least in the area of the introduced identifiers (20, 22).

Description

Datenträger mit mittels Laserstrahl eingeschriebenen Kennzeichnungen und Verfahren zu seiner Herstellung Data carrier with markings inscribed by means of a laser beam and method for its production
Die Erfindung betrifft einen Datenträger, in den durch einen Laserstrahl Kennzeichnungen in Form von Mustern, Buchstaben, Zahlen und/ oder Bildern eingebracht sind, die aufgrund von durch den Laserstrahl bewirkten, aus Materialumwandlungen resultierenden lokalen Änderungen der optischen Eigenschaften des Datenträgers sichtbar sind.The invention relates to a data carrier in which markings in the form of patterns, letters, numbers and / or images are introduced by a laser beam, which are visible due to local changes in the optical properties of the data carrier caused by the laser beam and resulting from material conversions.
Datenträger, wie beispielsweise Ausweiskarten, Kreditkarten, Bankkarten und dergleichen, werden in steigendem Maß in verschiedenen Dienstleistungssektoren, aber auch im innerbetrieblichen Bereich eingesetzt. Sie müssen dabei in der Regel zwei gegenläufige Bedingungen erfüllen. So stellen sie wegen ihrer großen Verbreitung zum einen ein Massenprodukt dar, das einfach und kostengünstig herzustellen sein soll. Zum anderen sollen sie aufgrund ihrer Legitimationsfunktion größtmögliche Sicherheit gegen Fälschung oder Verfälschung bieten. Die Vielzahl der erhältlichen Arten von Ausweiskarten ist Zeugnis für die zahlreichen Bemühungen und die ver- schiedenartigen Vorschläge, wie diese gegenläufigen Anforderungen in geeigneter Weise miteinander verbunden werden können.Data carriers, such as ID cards, credit cards, bank cards and the like, are being used to an increasing extent in various service sectors, but also in the internal area. As a rule, you must meet two opposing conditions. Because of their widespread use, they represent a mass product that should be easy and inexpensive to manufacture. On the other hand, they should offer the greatest possible security against counterfeiting or falsification due to their legitimation function. The large number of types of ID cards available is testimony to the numerous efforts and the various suggestions as to how these conflicting requirements can be combined in a suitable manner.
Beispielsweise ist aus der deutschen Patentschrift DE 31 51 407 CI eine mehrschichtige Ausweiskarte bekannt, die mit einer Plastikfolie als Auf- zeichnungsmedium ausgestattet ist. Die Plastikfolie erscheint im sichtbaren Wellenlängenbereich völlig transparent, absorbiert jedoch bei der Wellenlänge eines zum Einschreiben von Informationen benutzten Infrarotlasers so stark, dass sich durch die Einwirkung des Laserstrahls eine lokale Schwärzung der Folie ergibt. Damit können Bilder und/ oder Daten mit einer guten Auflösung in die Plastikfolie eingeschrieben werden. Auch wenn die Ausweiskarte der DE 31 51 407 CI ein hohes Maß an Fälschungssicherheit bietet, besteht das Bedürfnis, die visuellen Gestaltungsmöglichkeiten derartiger Karten zu erweitern und die Verfälschung oder Fälschung der Karten durch Einführung neuer oder zusätzlicher Sicherheits- merkmale weiter zu erschweren.For example, a multilayer identification card is known from the German patent DE 31 51 407 CI, which is equipped with a plastic film as the recording medium. The plastic film appears completely transparent in the visible wavelength range, but absorbs so strongly at the wavelength of an infrared laser used to write information that the film is locally blackened by the action of the laser beam. This allows images and / or data to be written into the plastic film with good resolution. Even if the ID card of DE 31 51 407 CI offers a high level of security against forgery, there is a need to expand the visual design options of such cards and to further complicate the forgery or forgery of the cards by introducing new or additional security features.
In diesem Zusammenhang ist es seit längerem bekannt, Ausweiskarten mit holographischen oder hologrammartigen Beugungsstrukturen zu versehen. Durch derartige Strukturen werden die Karten mit optisch variablen Effekten ausgestattet und zugleich mit einem wirkungsvollen Schutz gegen photographische oder xerographische Reproduktion versehen. Aufgrund der hohen Herstellungskosten holographischer Strukturen können diese nur bei der Verwendung großer Stückzahlen mit wirtschaftlich vertretbarem Aufwand hergestellt werden. Dies setzt in der Regel voraus, dass sich der Infor- mationsgehalt der Hologramme nicht voneinander unterscheidet. Zur Herstellung wird die Information üblicherweise mit einem Prägestempel in eine Plastikfolie geprägt. Die Plastikfolie wird mit einer reflektierenden Schicht versehen und die Oberfläche mit einer Schutzschicht versiegelt. Das fertige Hologramm wird bei der Kartenherstellung auf die Kartenoberfläche aufge- klebt. Aus den oben genannten Gründen sind die Hologramme üblicherweise nicht mit auf die jeweilige Karte abgestimmten Informationen versehen, so dass es grundsätzlich möglich ist, ein Hologramm von einer echten Karte auf eine falsche Karte zu übertragen.In this context, it has long been known to provide identity cards with holographic or hologram-like diffraction structures. Structures of this type provide the cards with optically variable effects and at the same time provide effective protection against photographic or xerographic reproduction. Due to the high production costs of holographic structures, these can only be produced with economically justifiable expenditure if large quantities are used. As a rule, this presupposes that the information content of the holograms does not differ from one another. The information is usually embossed in a plastic film with an embossing stamp. The plastic film is provided with a reflective layer and the surface is sealed with a protective layer. The finished hologram is glued to the card surface during card production. For the reasons mentioned above, the holograms are usually not provided with information matched to the respective card, so that it is fundamentally possible to transfer a hologram from a real card to a wrong card.
Eine weitere Schwierigkeit besteht darin, dass die visuelle Prüfung eines Hologramms gute Lichtverhältnisse voraussetzt. Schon bei der in Banken, Läden oder Betrieben vorherrschenden diffusen Raumbeleuchtung sind die holographischen Effekte oft nur schwer oder gar nicht erkennbar. Auch mit so genannten Dekorationsmaterialien können metallisch spiegelnde oder leicht schillernde Flächen erzeugt werden, so dass die mit solchen Dekorationsmaterialien gebildete Strukturen von Laien unter ungünstigen Lichtverhältnissen mit echten Hologrammen verwechselt werden können.Another difficulty is that visual inspection of a hologram requires good lighting conditions. Even with the diffuse room lighting prevailing in banks, shops or companies, the holographic effects are often difficult or impossible to detect. Even with so-called decoration materials, metallic reflective or slightly iridescent surfaces are generated, so that the structures formed with such decoration materials can be confused with real holograms by laypersons under unfavorable lighting conditions.
Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, die visuellen Gestaltungsmöglichkeiten eines laserbeschrifteten Datenträgers zu erweitern, und dabei insbesondere photographisch oder xerographisch nicht reproduzierbare Merkmale einzubringen, die auch bei ungünstigen Lichtverhältnissen erkannt werden können.Proceeding from this, the object of the invention is to expand the visual design options of a laser-inscribed data carrier, and in particular to incorporate features which are not reproducible photographically or xerographically and which can be recognized even under unfavorable lighting conditions.
Diese Aufgabe wird durch den Datenträger und das Herstellungsverfahren mit den Merkmalen der unabhängigen Ansprüche gelöst. Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.This object is achieved by the data carrier and the manufacturing method with the features of the independent claims. Developments of the invention are the subject of the dependent claims.
Gemäß der Erfindung umfasst ein gattungsgemäßer Datenträger eine im sichtbaren Spektralbereich transparente, lasersensitive Aufzeichnungsschicht, die mit einem Oberflächenrelief in Form eines Linsenrasters versehen ist. Die Kennzeichnungen sind dabei mit dem Laserstrahl aus unterschiedlichen Richtungen durch das Linsenraster hindurch in die Aufzeich- nungsschicht eingebracht und bei der Betrachtung aus denselben Richtungen erkennbar. Zumindest im Bereich der eingebrachten Kennzeichnungen ist der Datenträger transparent. Durch diese Merkmalskombination wird ein optisch ansprechendes Design des Datenträgers mit hoher Fälschungssicherheit verbunden.According to the invention, a generic data carrier comprises a laser-sensitive recording layer which is transparent in the visible spectral range and which is provided with a surface relief in the form of a lenticular screen. The markings are introduced into the recording layer with the laser beam from different directions through the lenticular grid and are recognizable when viewed from the same directions. The data carrier is transparent, at least in the area of the introduced markings. This combination of features combines an optically appealing design of the data carrier with a high level of security against forgery.
Die Kennzeichnungen werden durch das Linsenraster hindurch in die darunter liegende Aufzeichnungsschicht eingebracht. Dabei wird der Laserstrahl in verschiedenen, vorbestim ten Winkeln zur Ebene des Linsenrasters gehalten, so dass bei Durchgang der Laserstrahlung durch die Linsen ver- schiedene Stellen der Aufzeichnungsschicht modifiziert, in der Regel geschwärzt werden. Die so eingebrachten Kennzeichnungen sind jeweils im Wesentlichen nur aus demjenigen Winkel erkennbar, unter dem sie eingebracht wurden. Die Größe des Winkelbereichs, unter dem eine Kennzeich- nung sichtbar ist, hängt von der Größe des modifizierten Bereichs ab, und kann beispielsweise über die Pulsenergie des Laserstrahls eingestellt werden. Somit kann der Datenträger mit zwei oder mehreren verschiedenen Kennzeichnungen versehen werden, die sich photographisch oder xerographisch nicht reproduzieren lassen, da unter einem bestimmten Betrachtungswinkel niemals die gesamte eingeschriebene Information erkennbar ist.The markings are introduced through the lenticular screen into the underlying recording layer. The laser beam is held at different, predetermined angles to the plane of the lens grid, so that when the laser radiation passes through the lenses, different areas of the recording layer are modified, usually blackened. The markings introduced in this way can essentially only be recognized from the angle at which they were introduced. The size of the angular range under which an identification is visible depends on the size of the modified area and can be set, for example, via the pulse energy of the laser beam. The data carrier can thus be provided with two or more different markings which cannot be reproduced photographically or xerographically, since the entire information written in can never be recognized from a certain viewing angle.
Da der Datenträger zumindest im Bereich der eingebrachten Kennzeichnungen transparent ist, sind die aufgrund der lokalen Änderungen der optischen Eigenschaften des Datenträgers sichtbaren Kennzeichnungen gegebenenfalls zusätzlich oder ausschließlich im Durchlicht zu erkennen, d.h. unabhängig von der Betrachtung von Vorder- oder Rückseite oder nur bei Betrachtung von einer Seite. Alternativ zu einer Schwärzung oder sonstigen Verfärbung der Auf Zeichnungsschicht kann der Laserstrahl beispielsweise auch eine lokale Änderung des Brechungsindex oder eine Änderung der Polarisations- richtung der transparenten Aufzeichnungsschicht bewirken, so dass die eingeschriebene Kennzeichnung im Auflicht, also bei Betrachtung von der Vor- der-(Linsen-)seite her praktisch unsichtbar ist. Damit können optisch ansprechende Echtheitsmerkmale in Datenträger eingebracht werden, die ihm zusammen mit dem vorzugsweise spezifischen Informationsgehalt ein hohes Maß an Fälschungssicherheit verleihen.Since the data carrier is transparent, at least in the area of the introduced markings, the markings visible due to the local changes in the optical properties of the data carrier may be additionally or exclusively recognizable in transmitted light, i.e. regardless of whether you are viewing the front or back or only when viewing from one side. As an alternative to blackening or other discoloration of the recording layer, the laser beam can, for example, also cause a local change in the refractive index or a change in the polarization direction of the transparent recording layer, so that the inscribed identification in reflected light, that is to say when viewed from the front ( Lens side) is practically invisible. Visually appealing authenticity features can thus be introduced into data carriers which, together with the preferably specific information content, give it a high degree of security against forgery.
In einer vorteilhaften Ausgestaltung der Erfindung umfasst das Linsenraster Zylinderlinsen und/ oder sphärische Linsen. Je nach konkretem Anwendungsfall kann die Achse der Zylinderlinsen dabei geradlinig oder ge- schwungen, parallel oder in einem bestimmten Winkel zu den äußeren Kanten des Datenträgers verlaufen.In an advantageous embodiment of the invention, the lenticular grid comprises cylindrical lenses and / or spherical lenses. Depending on the specific application, the axis of the cylindrical lenses can be straight or swing, parallel or at a certain angle to the outer edges of the disk.
Die Auf Zeichnungsschicht kann Teil eines transparenten Hauptkörpers des Datenträgers sein oder alternativ durch eine separate Schicht gebildet sein. Im letzteren Fall ist die Auf Zeichnungsschicht nach einer Weiterbildung der Erfindung durch eine nicht selbsttragende Schicht einer Dicke besonders bevorzugt von etwa 1 μm bis etwa 50 μm gebildet, beispielsweise eine zumindest in Teilbereichen dotierte Kunststofffolie aus Polycarbonat oder Poly- ester. Zum Schutz der eingeschriebenen Informationen und zur Erhöhung der Fälschungssicherheit ist die Auf Zeichnungsschicht vorzugsweise im Inneren des Datenträgers angeordnet. Die Dicke der Schicht hängt unter anderem vom Material, der Linsengeometrie und der Anwendungsart ab und variiert bevorzugt zwischen 1 bis 800 μm. Die Schicht kann aus PVC, PC, Polyester und Compounds davon bestehen.The drawing layer can be part of a transparent main body of the data carrier or alternatively can be formed by a separate layer. In the latter case, the recording layer is formed according to a further development of the invention by a non-self-supporting layer with a thickness of particularly preferably from approximately 1 μm to approximately 50 μm, for example a plastic film made of polycarbonate or polyester doped at least in some areas. In order to protect the information written in and to increase the security against forgery, the drawing layer is preferably arranged in the interior of the data carrier. The thickness of the layer depends, among other things, on the material, the lens geometry and the type of application and preferably varies between 1 to 800 μm. The layer can consist of PVC, PC, polyester and compounds thereof.
Die Kennzeichnungen können personenbezogene Daten, wie eine Unterschrift, ein Geburtsdatum, ein Portrait oder dergleichen, umfassen, aber auch oder zusätzlich datenträgerbezogene Daten, wie eine Gültigkeitsdauer, eine Kartennummer, Angaben zur ausstellenden Behörde oder Institut oder dergleichen. Besonders geeignet für die Laserbeschriftung sind gerasterte Kennzeichnungen, wobei die Rasterelemente vorzugsweise durch stäbchenförmi- ge Pixel gebildet sind. Die einzelnen Rasterelemente können dann kontrolliert durch gepulste Bestrahlung der Aufzeichnungsschicht, beispielsweise mit einem Nd:Y AG-Laser, einem Nd:Glas-Laser oder auch einem längerwelligen Cθ2-Laser erzeugt werden.The markings can include personal data, such as a signature, a date of birth, a portrait or the like, but also or additionally, data relating to a data carrier, such as a period of validity, a card number, details of the issuing authority or institute or the like. Rasterized markings are particularly suitable for laser inscription, the raster elements preferably being formed by rod-shaped pixels. The individual raster elements can then be generated in a controlled manner by pulsed irradiation of the recording layer, for example with an Nd: Y AG laser, an Nd: glass laser or even a longer-wave CO 2 laser.
Die aus unterschiedlichen Richtungen erkennbaren Kennzeichnungen liegen in der Aufzeichnungsschicht zweckmäßig ineinander verschachtelt vor. Die Trennung des Informationsgehalts erfolgt beim Betrachten des Datenträgers aus den den Aufzeichnungsrichtungen entsprechenden Betrachtungsrichtungen, da das Linsenraster dem Betrachter jeweils nur den der Betrachtungsrichtung zugeordneten Teil der Kennzeichnungen zeigt. Dies macht eine drucktechnische Reproduktion der eingeschriebenen Information praktisch unmöglich, da eine genaue Ausrichtung auf ein später aufgebrachtes Linsenraster nicht mit der erforderlichen Genauigkeit gelingt.The identifications recognizable from different directions are expediently nested in the recording layer. The When viewing the data carrier, the information content is separated from the viewing directions corresponding to the recording directions, since the lenticular screen shows the viewer only the part of the markings assigned to the viewing direction. This makes it practically impossible to reproduce the information written in the printing process, since precise alignment with a later applied lens grid is not possible with the required accuracy.
In einer zweckmäßigen Ausgestaltung sind die Auf Zeichnungsschicht und das Linsenraster in oder auf einem transparenten Hauptkörper des Datenträgers angeordnet. Neben den bisher beschriebenen lasergeschriebenen Kennzeichnungen kann der Datenträger selbstverständlich weitere schwarzweiße oder farbige Aufdrucke und/ oder weitere Laserbeschriftungen aufweisen. Der Datenträger kann auch mit einem oder mehreren weite- ren Sicherheitsmerkmalen, insbesondere lumineszierenden, magnetischen oder elektrischen Stoffen, oder optisch variablen Strukturen, wie holographischen Strukturen, versehen sein.In an expedient embodiment, the drawing layer and the lens grid are arranged in or on a transparent main body of the data carrier. In addition to the laser-written markings described so far, the data carrier can of course have further black and white or colored imprints and / or further laser inscriptions. The data carrier can also be provided with one or more further security features, in particular luminescent, magnetic or electrical substances, or optically variable structures, such as holographic structures.
In einer weiteren Ausgestaltung ist die transparente Aufzeichnungsschicht als Implantat oder Teil eines transparenten Implantates in den Hauptkörper integriert. In diesem Fall ist es sinnvoll, das Implantat mit dem Hauptkörper physisch zu verknüpfen. Dies ist beispielsweise möglich durch ein Linsenraster, das größer als das transparente Implantat ist und das Implantat wie den Hauptkörper zumindest teilweise überlappt. Des Weiteren ist dies möglich, wenn das Implantat und der Hauptkörper je eine Aufzeichungsschicht aufweisen, die z.B. aneinander grenzen, so dass Implantat und Kartenkörper mit ein und derselben Personalisierung, z.B. einem Bild, untrennbar verbunden werden. In einer weiteren Ausgestaltung handelt es sich um eine Banknote, die einerseits mit der erfindungsgemäßen Aufzeichnungsschicht mit Linsenraster ausgestattet ist und andererseits ein bestimmtes Druckbild aufweist. Die Auf Zeichnungsschicht mit Linsenraster und das Druckbild sind so auf der Banknote angeordnet, dass sie übereinander geklappt werden können und die in die Auf Zeichnungsschicht eingeschriebenen Kennzeichen sich mit dem Druckbild zu einer Gesamtinformation ergänzen.In a further embodiment, the transparent recording layer is integrated into the main body as an implant or as part of a transparent implant. In this case, it makes sense to physically link the implant to the main body. This is possible, for example, by means of a lenticular grid which is larger than the transparent implant and at least partially overlaps the implant like the main body. Furthermore, this is possible if the implant and the main body each have a recording layer, which adjoin one another, for example, so that the implant and card body are inseparably connected with one and the same personalization, for example an image. In a further embodiment, it is a banknote which is equipped on the one hand with the recording layer according to the invention with a lenticular screen and on the other hand has a specific printed image. The drawing layer with a lenticular grid and the printed image are arranged on the banknote in such a way that they can be folded over one another and the marks inscribed in the drawing layer complement the printed image to provide overall information.
Der Datenträger stellt bevorzugt ein Wertdokument, wie eine Banknote, eine Ausweiskarte oder dergleichen, dar. In anderen, ebenfalls vorteilhaften Ausgestaltungen stellt der Datenträger ein Sicherheitselement zum Aufbringen auf ein Wertdokument, wie eine Banknote, eine Ausweiskarte oder dergleichen, dar.The data carrier preferably represents a document of value, such as a banknote, an identification card or the like. In other, likewise advantageous configurations, the data carrier represents a security element for application to a document of value, such as a banknote, an identification card or the like.
Die Erfindung enthält auch ein Wertdokument, wie eine Banknote, Ausweiskarte oder dergleichen, mit einem Wertdokumentsubstrat mit einem Fensterbereich oder Loch, welches auf einer Seite oder auf beiden Seiten mit einem Sicherheitselement der genannten Art bedeckt ist. Da das Sicherheitselement erfindungsgemäß transparent ist, können die eingeschriebenen Kennzeichnungen durch den Fensterbereich oder das Loch des Wertpapiers hindurch im Durchlicht gelesen werden.The invention also includes a document of value, such as a bank note, identity card or the like, with a document substrate of value with a window area or hole which is covered on one side or on both sides with a security element of the type mentioned. Since the security element is transparent according to the invention, the inscriptions can be read through the window area or the hole in the security in transmitted light.
Bei der Herstellung eines Datenträgers der beschriebenen Art wird zunächst die im sichtbaren Spektralbereich transparente, lasersensitive Aufzeich- nungsschicht mit dem Oberflächenrelief in Form eines Linsenrasters versehen und nachfolgend werden in einem transparenten Bereich des Datenträgers die Kennzeichnungen mit dem Laserstrahl aus unterschiedlichen Richtungen durch das Linsenraster hindurch in die Auf Zeichnungsschicht einge- bracht, so dass die Kennzeichnungen bei der späteren Betrachtung des Datenträgers aus denselben Richtungen erkennbar sind.When producing a data carrier of the type described, the laser-sensitive recording layer, which is transparent in the visible spectral range, is first provided with the surface relief in the form of a lens grid and subsequently the markings with the laser beam are passed through the lens grid from different directions in a transparent area of the data carrier the on the drawing layer brings so that the markings can be seen from the same directions when looking at the data medium later.
Die Kennzeichnungen werden dabei bevorzugt in einem Rasterverfahren eingebracht, wobei die Rasterelemente vorzugsweise durch stäbchenf örmige Pixel gebildet werden. Gepulste Laserstrahlung ist zur Erzeugung derartiger Rasterelemente besonders gut geeignet.The markings are preferably introduced in a raster process, the raster elements preferably being formed by rod-shaped pixels. Pulsed laser radiation is particularly well suited for generating such raster elements.
Weitere Ausführungsbeispiele sowie Vorteile der Erfindung werden nach- folgend anhand der Figuren erläutert, bei deren Darstellung auf eine maß- stabs- und proportionsgetreue Wiedergabe verzichtet wurde, um die Anschaulichkeit zu erhöhen.Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the illustration of which a true-to-scale and proportioned reproduction has been omitted in order to increase clarity.
Es zeigen:Show it:
Fig. 1 eine Aufsicht auf eine transparente Ausweiskarte nach einem Ausführungsbeispiel der Erfindung in schematischer Darstellung,1 is a plan view of a transparent identification card according to an embodiment of the invention in a schematic representation,
Fig. 2 eine Schnittdarstellung der Ausweiskarte von Fig. 1 entlang der Linie II-II, undFig. 2 is a sectional view of the ID card of Fig. 1 along the line II-II, and
Fig. 3 einen Schnitt durch eine Banknote mit ausgestanzter Öffnung, die mit einem Sicherheitselement nach einem Ausführungsbei- spiel der Erfindung abgedeckt ist.3 shows a section through a banknote with a punched-out opening, which is covered with a security element according to an exemplary embodiment of the invention.
Fig. 1 zeigt eine Aufsicht auf eine erfindungsgemäße transparente Ausweiskarte 10 in schematischer Darstellung. Die Ausweiskarte 10 enthält ein Por- trait 12 des Karteninhabers sowie weitere personenbezogene Daten 14, im Ausführungsbeispiel den Vor- und Nachnamen des Inhabers. Darüber hinaus kann die Ausweiskarte weitere Daten 16, wie etwa Geburtsdatum, Nationalität, Ausstellungsbehörde, Ausstellungsdatum und dergleichen, enthalten.1 shows a plan view of a transparent identification card 10 according to the invention in a schematic representation. The identification card 10 contains a portrait 12 of the cardholder and further personal data 14, in Example of the first and last name of the owner. In addition, the identity card can contain further data 16, such as date of birth, nationality, issuing authority, date of issue and the like.
In einem Teilbereich 18 der Ausweiskarte 10 ist ein Laserkippbild angeordnet, das zwei verschiedene, mittels Laserstrahl eingeschriebene Informationen, im Ausführungsbeispiel die Unterschrift des Inhabers 20 und das Gültigkeitsdatum der Karte 22, enthält. Die beiden Informationen 20 und 22 sind, anders als bei der zeichnerischen Darstellung der Fig. 1, bei der Betrachtung der Ausweiskarte 10 nicht gleichzeitig, sondern nur durch Verkippen der Karte 10 in einem jeweils unterschiedlichen Kippwinkel erkennbar.A laser tilt image is arranged in a partial area 18 of the identification card 10 and contains two different pieces of information, which are inscribed by means of a laser beam, in the exemplary embodiment the signature of the holder 20 and the date of validity of the card 22. In contrast to the drawing of FIG. 1, the two pieces of information 20 and 22 cannot be recognized when looking at the identification card 10 at the same time, but only by tilting the card 10 at a different tilt angle.
Der grundsätzliche Aufbau des Laserkippbilds 18 wird nun mit Bezug auf Fig. 2 näher erläutert, welche einen Schnitt durch die Ausweiskarte 10 entlang der Linie II-II der Fig. 1 zeigt. Die Ausweiskarte 10 enthält einen transparenten Kartenkörper 24 und eine im sichtbaren Spektralbereich ebenfalls transparente, lasersensitive Aufzeichnungsschicht 26. Bei der Aufzeichnungsschicht 26 kann es sich um einen Teilbereich des Kartenkörpers 24 oder um eine separate Schicht handeln. Die Auf Zeichnungsschicht 26 ist mit einem Oberflächenrelief in Form eines Linsenrasters 28 versehen, das im Ausführungsbeispiel aus einer Mehrzahl paralleler Zylinderlinsen besteht.The basic structure of the laser tilt image 18 is now explained in more detail with reference to FIG. 2, which shows a section through the identification card 10 along the line II-II of FIG. 1. The identification card 10 contains a transparent card body 24 and a laser-sensitive recording layer 26 which is also transparent in the visible spectral range. The recording layer 26 can be a partial area of the card body 24 or a separate layer. The drawing layer 26 is provided with a surface relief in the form of a lenticular grid 28, which in the exemplary embodiment consists of a plurality of parallel cylindrical lenses.
Die in das Laserkippbild eingebrachten personenbezogenen Informationen 20 und 22 werden erst nach dem Aufbringen des Linsenrasters 28 mittels eines gepulsten Infrarotlasers in die Aufzeichnungsschicht 26 eingeschrieben. Der Laserstrahl wird dazu aus verschiedenen Richtungen 30 bzw. 32 auf das Linsenraster 28 gerichtet. Die einzelnen Zylinderlinsen f okussieren den La- serstrahl dabei je nach Bestrahlungsrichtung auf unterschiedliche kleine Teilbereiche 34 bzw. 36 der Aufzeichnungsschicht.The personal information 20 and 22 introduced into the laser tilt image is only written into the recording layer 26 after the lens grid 28 has been applied by means of a pulsed infrared laser. For this purpose, the laser beam is directed from different directions 30 and 32 onto the lens grid 28. The individual cylindrical lenses focus the lens Depending on the direction of irradiation, the beam of light strikes different small subregions 34 or 36 of the recording layer.
Durch die Wirkung der Laserstrahlung werden die optischen Eigenschaften der Aufzeichnungsschicht 26 lokal verändert, beispielsweise wird die Schicht lokal geschwärzt. Bei späterer Betrachtung der Ausweiskarte 10 aus Richtung 30 sind wegen der fokussierenden Wirkung der Zylinderlinsen gerade die geschwärzten Teilbereiche 34 erkennbar, die sich für den Betrachter zu einem Bild, im Ausführungsbeispiel der eingeschriebenen Unterschrift 20, zusammensetzen. Entsprechend sind aus der Betrachtungsrichtung 32 die aus dieser Richtung eingeschriebenen Teilbereiche 36 erkennbar und setzen sich für den Betrachter zu einem Bild des Gültigkeitsdatums 22 zusammen.The optical properties of the recording layer 26 are changed locally by the action of the laser radiation, for example the layer is locally blackened. When the identification card 10 is viewed later from the direction 30, the blackened sub-areas 34 can be seen precisely because of the focusing effect of the cylindrical lenses, which are composed for the viewer to form an image, in the exemplary embodiment of the inscription 20 inscribed. Correspondingly, the partial areas 36 inscribed from this direction can be seen from the viewing direction 32 and compose an image of the validity date 22 for the viewer.
Es versteht sich, dass die Ausweiskarte 10 zusätzliche Schichten, beispiels- weise eine oder mehrere Schutzschichten oder mit anderen Sicherheitselementen versehene Funktionsschichten, aufweisen kann. Dabei muss lediglich die Transparenz des Datenträgers 10 im Bereich der eingeschriebenen Kennzeichnungen 20, 22 erhalten bleiben. Diese weiteren Schichten sind für die vorliegende Erfindung nicht wesentlich und sind daher weder in den Figu- ren gezeigt noch näher beschrieben.It goes without saying that the identification card 10 can have additional layers, for example one or more protective layers or functional layers provided with other security elements. It is only necessary to maintain the transparency of the data carrier 10 in the area of the inscribed markings 20, 22. These further layers are not essential for the present invention and are therefore neither shown in the figures nor described in detail.
Ein weiteres Ausführungsbeispiel der Erfindung ist in der Fig. 3 dargestellt, die eine Banknote 40 mit einer durchgehenden gestanzten Öffnung 42 zeigt. Die Öffnung 42 ist auf der Vorderseite der Banknote 40 vollständig mit ei- nem transparenten Sicherheitselement 44 nach der Erfindung bedeckt. Das Sicherheitselement 44 weist einen transparenten Hauptkörper 46 sowie eine im sichtbaren Spektralbereich transparente Aufzeichnungsschicht 48 auf, in die, wie oben beschrieben, mittels Laserstrahl Informationen eingeschrieben wurden, welche beispielsweise eine Seriennummer der Banknote enthalten. Die Auf zeichnungsschicht 48 ist von einem Linsenraster 50 bedeckt, das im Ausführungsbeispiel aus einer Mehrzahl sphärischer Linsen besteht, die in den transparenten Hauptkörper 46 geprägt sind. Durch die Wirkung der Laserstrahlung ist die Aufzeichnungsschicht 48 an manchen Stellen geschwärzt, während die übrigen Bereiche der Auf zeichnungsschicht 48 unverändert transparent sind. Die eingeschriebene Seriennummer kann daher aus der entsprechenden Betrachtungsrichtung sowohl in Aufsicht als auch durch die Öffnung 42 der Banknote 40 hindurch von der Rückseite her gelesen werden. Der Kippeffekt verschwindet bei einer photographischen oder xerographi- sehen Reproduktion der Banknote.Another embodiment of the invention is shown in FIG. 3, which shows a bank note 40 with a continuous punched opening 42. The opening 42 is completely covered on the front side of the banknote 40 with a transparent security element 44 according to the invention. The security element 44 has a transparent main body 46 and a recording layer 48 which is transparent in the visible spectral range and into which, as described above, information was written by means of a laser beam which, for example, contains a serial number of the bank note. The recording layer 48 is covered by a lenticular grid 50, which in the exemplary embodiment consists of a plurality of spherical lenses which are embossed into the transparent main body 46. Due to the effect of the laser radiation, the recording layer 48 is blackened in some places, while the remaining areas of the recording layer 48 remain transparent. The registered serial number can therefore be read from the corresponding viewing direction both from above and through the opening 42 of the banknote 40 from the back. The tilting effect disappears when the banknote is reproduced photographically or xerographically.
Anstelle der Schwärzung kann die Laserbestrahlung auch nur zu einer lokalen Änderung des Brechungsindex oder der Polarisationsrichtung der Aufzeichnungsschicht eingesetzt werden. Damit wird eine Nachstellung des Si- cherheitselements 44 weiter erschwert. Instead of blackening, the laser radiation can also be used only for a local change in the refractive index or the direction of polarization of the recording layer. This further complicates an adjustment of the security element 44.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Datenträger, in den durch einen Laserstrahl Kennzeichnungen in Form von Mustern, Buchstaben, Zahlen und/ oder Bildern eingebracht sind, die aufgrund von durch den Laserstrahl bewirkten, aus Materialumwandlungen resultierenden lokalen Änderungen der optischen Eigenschaften des Datenträgers sichtbar sind, dadurch gekennzeichnet, dass der Datenträger eine im sichtbaren Spektralbereich transparente, lasersensitive Auf zeichnungsschicht umfasst, die mit einem Oberflächenrelief in Form eines Linsen- rasters versehen ist, so dass die Kennzeichnungen mit dem Laserstrahl aus unterschiedlichen Richtungen durch das Linsenraster hindurch in die Aufzeichnungsschicht eingebracht sind und bei der Betrachtung aus denselben Richtungen erkennbar sind, und dass der Datenträger zumindest im Bereich der eingebrachten Kennzeichnungen transparent ist.1. A data carrier in which markings in the form of patterns, letters, numbers and / or images are introduced by a laser beam, which are visible due to local changes in the optical properties of the data carrier resulting from material conversions, characterized in that the data carrier comprises a laser-sensitive recording layer which is transparent in the visible spectral range and which is provided with a surface relief in the form of a lens grid, so that the markings with the laser beam are introduced into the recording layer from different directions through the lens grid and when viewed same directions are recognizable, and that the data carrier is transparent at least in the area of the introduced markings.
2. Datenträger nach Anspruch 1, dadurch gekennzeichnet, dass die Änderungen der optischen Eigenschaften des Datenträgers im Durchlicht sichtbar sind.2. Data carrier according to claim 1, characterized in that the changes in the optical properties of the data carrier are visible in transmitted light.
3. Datenträger nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Änderungen der optischen Eigenschaften des Datenträgers im Auflicht sichtbar sind.3. Data carrier according to claim 1 or 2, characterized in that the changes in the optical properties of the data carrier are visible in incident light.
4. Datenträger nach wenigstens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Linsenraster Zylinderlinsen und/ oder sphärische Linsen umfasst. 4. Data carrier according to at least one of claims 1 to 3, characterized in that the lenticular grid comprises cylindrical lenses and / or spherical lenses.
5. Datenträger nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Aufzeichnungsschicht durch eine nicht selbsttragende Schicht einer Dicke von etwa 1 μm bis etwa 800 μm gebildet ist.5. Data carrier according to at least one of claims 1 to 4, characterized in that the recording layer is formed by a non-self-supporting layer with a thickness of approximately 1 μm to approximately 800 μm.
6. Datenträger nach wenigstens einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Auf Zeichnungsschicht im Inneren des Datenträgers angeordnet ist.6. Data carrier according to at least one of claims 1 to 5, characterized in that the drawing layer is arranged inside the data carrier.
7. Datenträger nach wenigstens einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Kennzeichnungen personenbezogene Daten, wie eine Unterschrift, ein Geburtsdatum, ein Portrait oder dergleichen, umfassen.7. Data carrier according to at least one of claims 1 to 6, characterized in that the markings comprise personal data, such as a signature, a date of birth, a portrait or the like.
8. Datenträger nach wenigstens einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kennzeichnungen datenträgerbezogene Daten, wie eine Gültigkeitsdauer, eine Kartennummer, Angabe zur ausstellenden Behörde oder Institut oder dergleichen, umfassen.8. A data carrier according to at least one of claims 1 to 7, characterized in that the markings comprise data relating to the data carrier, such as a period of validity, a card number, details of the issuing authority or institute or the like.
9. Datenträger nach wenigstens einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Kennzeichnungen in gerasterter Form vorliegen, wobei die Rasterelemente vorzugsweise durch stäbchenförmige Pixel gebildet sind.9. Data carrier according to at least one of claims 1 to 8, characterized in that the markings are in a rasterized form, the raster elements preferably being formed by rod-shaped pixels.
10. Datenträger nach wenigstens einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die aus unterschiedlichen Richtungen erkennbaren Kennzeichnungen in der Aufzeichnungsschicht ineinander verschachtelt vorliegen.10. Data carrier according to at least one of claims 1 to 9, characterized in that the identifiable identifications from different directions are present in the recording layer nested.
11. Datenträger nach wenigstens einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der Datenträger einen zumindest teilweise transpa- renten Hauptkörper aufweist, in oder auf dem die Aufzeichnungsschicht und das Linsenraster angeordnet sind.11. Data carrier according to at least one of claims 1 to 10, characterized in that the data carrier is an at least partially transparent annuity main body, in or on which the recording layer and the lenticular array are arranged.
12. Datenträger nach wenigstens einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Datenträger neben den Kennzeichnungen schwarzweiße oder farbige Aufdrucke und/ oder weitere Laserbeschriftungen aufweist.12. Data carrier according to at least one of claims 1 to 11, characterized in that the data carrier has, in addition to the markings, black and white or colored imprints and / or further laser inscriptions.
13. Datenträger nach wenigstens einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, dass der Datenträger mit einem oder mehreren weiteren13. Data carrier according to at least one of claims 1 to 12, characterized in that the data carrier with one or more others
Sicherheitsmerkmalen, insbesondere mit lumineszierenden, magnetischen oder elektrischen Stoffen, oder mit optisch variablen Strukturen, wie holographischen Strukturen, versehen ist.Security features, in particular with luminescent, magnetic or electrical substances, or with optically variable structures, such as holographic structures.
14. Datenträger nach wenigstens einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass der Datenträger ein Wertdokument, wie eine Banknote, eine Ausweiskarte oder dergleichen, darstellt.14. Data carrier according to at least one of claims 1 to 13, characterized in that the data carrier is a document of value, such as a banknote, an identification card or the like.
15. Datenträger nach wenigstens einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, dass der Datenträger ein Sicherheitselement zum Aufbringen auf ein Wertdokument, wie eine Banknote, eine Ausweiskarte oder dergleichen, darstellt.15. Data carrier according to at least one of claims 1 to 13, characterized in that the data carrier is a security element for application to a document of value, such as a banknote, an identification card or the like.
16. Wertdokument, wie Banknote, Ausweiskarte oder dergleichen, mit einem Wertdokumentsubstrat mit einem Fensterbereich oder Loch, welches auf einer Seite oder auf beiden Seiten mit einem Sicherheitselement nach Anspruch 15 bedeckt ist. 16. document of value, such as bank note, identity card or the like, with a document substrate with a window area or hole, which is covered on one side or on both sides with a security element according to claim 15.
17. Verfahren zur Herstellung eines Datenträgers nach wenigstens einem der Ansprüche 1 bis 15, bei dem die im sichtbaren Spektralbereich transparente, lasersensitive Auf- Zeichnungsschicht mit dem Oberflächenrelief in Form eines Linsenrasters versehen wird, und nachfolgend in einem transparenten Bereich des Datenträgers die Kennzeichnungen mit dem Laserstrahl aus unterschiedlichen Rich- hingen durch das Linsenraster hindurch in die Auf Zeichnungsschicht eingebracht werden, so dass die Kennzeichnungen bei der späteren Betrachtung des Datenträgers aus denselben Richtungen erkennbar sind.17. A method for producing a data carrier according to at least one of claims 1 to 15, in which the transparent, laser-sensitive recording layer in the visible spectral range is provided with the surface relief in the form of a lens grid, and subsequently in a transparent region of the data carrier the markings with the Laser beams from different directions are introduced through the lenticular grid into the recording layer, so that the markings can be recognized from the same directions when the data carrier is viewed later.
18. Verfahren nach Anspruch 17, dadurch gekennzeichnet, dass die18. The method according to claim 17, characterized in that the
Kennzeichnungen in einem Rasterverfahren eingebracht werden, wobei die Rasterelemente vorzugsweise durch stäbchenf örmige Pixel gebildet werden.Markings are introduced in a raster process, the raster elements preferably being formed by rod-shaped pixels.
19. Verfahren nach Anspruch 18, dadurch gekennzeichnet, dass die Ra- sterelemente durch Bestrahlung des Linsenrasters mit Laserpulsen erzeugt werden. 19. The method according to claim 18, characterized in that the raster elements are produced by irradiating the lenticular screen with laser pulses.
EP04803402A 2003-12-12 2004-12-01 Data support with identifications written thereon by means of a laser beam and method for production thereof Revoked EP1697146B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10358784A DE10358784A1 (en) 2003-12-12 2003-12-12 Data carrier with laser beam inscribed markings and method for its production
PCT/EP2004/013634 WO2005058610A2 (en) 2003-12-12 2004-12-01 Data support with identifications written thereon by means of a laser beam and method for production thereof

Publications (2)

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EP1697146A2 true EP1697146A2 (en) 2006-09-06
EP1697146B1 EP1697146B1 (en) 2012-02-15

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EP04803402A Revoked EP1697146B1 (en) 2003-12-12 2004-12-01 Data support with identifications written thereon by means of a laser beam and method for production thereof

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US (1) US8006908B2 (en)
EP (1) EP1697146B1 (en)
AT (1) ATE545518T1 (en)
DE (1) DE10358784A1 (en)
ES (1) ES2379632T3 (en)
WO (1) WO2005058610A2 (en)

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Publication number Publication date
US8006908B2 (en) 2011-08-30
ES2379632T3 (en) 2012-04-30
WO2005058610A2 (en) 2005-06-30
WO2005058610A3 (en) 2006-02-09
DE10358784A1 (en) 2005-07-14
EP1697146B1 (en) 2012-02-15
US20070063053A1 (en) 2007-03-22
ATE545518T1 (en) 2012-03-15

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