EP0980763B1 - Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung - Google Patents
Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung Download PDFInfo
- Publication number
- EP0980763B1 EP0980763B1 EP99115363A EP99115363A EP0980763B1 EP 0980763 B1 EP0980763 B1 EP 0980763B1 EP 99115363 A EP99115363 A EP 99115363A EP 99115363 A EP99115363 A EP 99115363A EP 0980763 B1 EP0980763 B1 EP 0980763B1
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- EP
- European Patent Office
- Prior art keywords
- value
- security document
- dyes
- laser
- security
- 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.)
- Expired - Lifetime
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Classifications
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
- B41M5/287—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using microcapsules or microspheres only
-
- B42D2035/34—
Definitions
- the invention relates to a value and security document according to the preamble of claim 1.
- the invention is based on a prior art, such as in the US 4,738,901.
- a value and security document in Form of copy-protected paper provided, in which phosphor particles are embedded. It is a copy protection, because with that Copier-associated lasers excite the phosphor particles and those of Radiation emitted by the phosphor particles is emitted by a second detector added, which accordingly tells the copier that it is a protected document. An authenticity check of such a value and Security document is not provided for in this copy protection process and not possible.
- DE-A-31 21 484 describes the use of laser dyes as luminophores with an absorbent material combined (e.g. coated) to all Suppress luminescence emissions in the visible range of the optical spectrum.
- WO-A-90/06539 describes a photochromic compound for protection against intense Sunlight coated with a laser dye as a UV absorber to increase life expectancy to extend an appropriate security marking.
- the object of the present invention is to carry out an authenticity check of value and To propose security documents with optically stimulable dyes which is a defined emission spectrum of the optically excited value and Security document can be recorded and therefore a characteristic spectrum for this value and security document which is characteristic of both in the Security document embedded dye as well as for the material of the Security document itself.
- the present invention is based on the fact that the introduction of certain optically stimulable dyes in a security document so that the optical excitation of the value and security document in the value and Security document embedded dyes in resonance with the material of the Value and security document to get a sharply defined To emit spectrum of all excited materials.
- solvents or other reagents is a suitable one depending on the application, e.g. UV-absorbing protective cover necessary.
- the laser dyes can be directly in one Color component (resins or pigments) can be integrated.
- Color component resins or pigments
- Laser dye is understood to be a very high excitable by laser beam efficiently fluorescent material in any physical state, d. H. firmly liquid or gaseous.
- laser dyes over fluorescent ones are sharp Emission peaks at defined emission wavelengths over the entire Fluorescence range of laser dyes.
- the "sharp emission peaks" according to the invention only if the laser-excitable used Fluorescent substances are integrated in an optical resonator. Only by this resonance generation results in the sharp emission peaks which then both characteristic of the geometry and optical properties of the resonators used as well as for the fluorescent substances used.
- the emission intensity is achieved by installing the laser dyes in one Resonator increased.
- the laser dye is coated on both sides containing polymer layers with metallic or dielectric layers a higher refractive index is necessary.
- this also significantly increases safety, because of the geometry and optical properties of the resonator, the number of peaks and their Set position in the wavelength range of fluorescence. In addition, also set the peak width using the geometry used.
- the dyes are directly in a To bring in the layer and / or print of the value and security document, wherein the reflective and / or dielectric layers are parts of the value and Represent security document.
- the laser-active element is not designed as part of the layer structure of the value and security document, but that the laser-active elements are produced in the form of independent resonators separately from the value and security document and only then in the form of pigment Platelets, chopsticks or spheres, the size of which is, for example, a few ⁇ m, are introduced into or placed on the document.
- the manufacture of such resonators for applications in security printing products is feasible, for example, using thin-film technology.
- the layer composite is comminuted, for example by breaking.
- the sheet-like fragments obtained in this way which are also referred to below as flakes or pigment platelets, with a thickness of 1 - 10 ⁇ m and an area ⁇ 20 x 20 ⁇ m 2, can then, depending on their size , be printed in appropriate inks (e.g. steel engraving , Screen printing, offset, letterpress) or be integrated into the paper and film material of the security document.
- appropriate inks e.g. steel engraving , Screen printing, offset, letterpress
- laser dyes can be used as a hidden or two-stage security feature that can be controlled with UV light, because, as already mentioned, all laser dyes show broadband UV fluorescence. The following sections describe ways of incorporating laser dyes into different components of security and value products.
- the incorporation of polymer-bound laser dyes into the paper can either by directly adding the bound dyes to the raw material mixture or by screen printing after drying respectively.
- the direct addition has the economic disadvantage that large Amounts for sufficient luminance must be added.
- On subsequent application to the paper by screen printing requires much smaller amounts of laser dyes and enables additionally a structuring in the sense of a watermark. at transparent, colorless laser dyes could be "hidden” Watermark "can be introduced into the paper. When used different laser dyes could be hidden, colored watermarks produce.
- the Card area In comparison to the direct insertion into or onto the paper, the Card area a very thin plastic film "doped" with the laser dyes or printed. Due to the specific map structure, you can use the Insert the foil provided with laser dyes in the middle of the laminate composite. This leads to a chemical-physical protection of the dyes Environmental influences, e.g. UV light and for a higher security through the close material bond between laser dye and polymer layer.
- plastic threads are partially metallized as window threads in security and security paper during manufacture.
- window threads are also provided with a micro script.
- the micro script can be produced chemically (etching) or physically (laser ablation).
- the exposed areas appear as windows.
- the connection to laser dyes could again be made via the plastic phase.
- the laser dyes can be easily integrated into the plastic matrix. In the case of excitation from above, below or from the side using a suitable laser light, the micro-writing would then light up, for example blue, depending on the laser dye selected.
- fibers or planchettes could also be provided with laser dyes.
- fibers there is the possibility of introducing the laser dyes into the fiber material, filling the fibers when using hollow fibers (d i > 10 ⁇ m) or one doped with laser dyes.
- polymer matrix as a covering (d ⁇ 2 ⁇ m) of the fibers.
- Planchettes can be coated or doped in a similar way to fibers.
- the present invention is not based on the excitation by means of a Lasers limited; other high-energy optical ones can also be used Excitation media are used, such as. B. a flash lamp, sodium or High pressure lamps and the like. A suggestion is also possible Luminescent diodes not only in the visible, but also in the invisible Wavelength range possible.
- laser dyes in valuable and security products are in direct insertion into a printing ink.
- These include steel engraving, screen printing and Offset inks (wet, dry offset and indirect letterpress printing) as well as inks for book printing (numbering) and others for value and Security printing relevant printing process.
- Laser dyes whether in molecular form or as a solid matrix, are necessary. If resonators are used, their shape (usually Platelets but also balls) and size for the transfer from the color to the Decisive material. While in steel engraving and screen printing in general Dye pigments up to a size of 20 ⁇ m printed without problems there is an upper limit of 2 to 4 ⁇ in the offset.
- the optical effects are reduced with a decrease in the active layer thickness (steel engraving up to 20 ⁇ m, offset 1 to 4 ⁇ m). Due to the color components of printing inks, it is also conceivable Integrate dye solutions directly into a component of the color.
- the colors, which as Carrier media for the laser dyes do not have strong covering properties have and if possible be transparent.
- UV excitation would be one Mixed fluorescence consisting of portions of EL pigments as well as portions of the laser dyes generate an excitation by means of a suitable one Laser beam would probably only excite the laser dyes, as for one Excitation of EL pigments using a pulsed electric laser beam Field portion of the laser light is unsuitable, and eventually one would electrical excitation to make the EL pigments glow.
- a pigment plate 1 is generally shown, which consists of two in essentially parallel and a mutual distance engaging, reflective layers 2, which is on a polymer layer 4 are applied.
- the reflective layers 2 consist of one Oxide layer, e.g. As silicon dioxide, silicon liquid, tin oxide, titanium oxide and the like more. But it can also be a metallic layer. Essential is only that two reflective layers 2 face each other, so too say as a mirror take up the polymer layer between them and in the Polymer layer 4, the laser dyes 3 are embedded. In addition, it can be provided that the end faces of the Pigment platelets 1 are provided with the reflective layers 2.
- the polymer layer 4 consists of a plastic polymer. Instead of one However, a layer of glass can also be used or a polymer layer other clear carrier that is both transparent to the stimulating Wavelength as well as must be transparent to the emitting wavelength. It it is therefore not necessary to use a polymer layer 4, but rather it any transparent carrier layers can be used. Here it is not that they are transparent in visible light, but that they can be transparent even in invisible light. In another embodiment, it can also be the electrical mentioned above Layers are omitted and only reflective layers on the end faces to be available.
- the invention is not limited; it can also provide that such Particulate and molecular laser dyes 3 are clustered or are distributed very differently in the density in the polymer layer 4. A uniform density distribution is therefore not necessary for the solution.
- the example according to FIG. 1, with one used as pigment plate 1 Dye 3 is not limitative of the present invention. Because it can instead of the pigment plate shown here with the two together opposite and reflecting layers 2 also Security document can be used, which this pigment plate 1 not includes.
- the two reflective layers would then be directly in the Security document integrated at a mutual distance parallel to each other and between the two reflective layers is the one with Laser dye molecules doped carrier layer, e.g. a polymer layer, arranged.
- the result is a laser-active element or a laser-active element Area on the security document that is made between the two reflective layers embedded and doped with laser dye Carrier layer exists. This means that the representation according to FIG. 1 can also be used magnified ten thousand times directly as a layered document be considered.
- the pigment platelets according to FIG are installed and distributed.
- the pigment platelets it is not necessary for the pigment platelets to have a solution are arranged in a relatively thin distribution in the paper. You can also form clusters; they can also be distributed on the surface or they can also be close to each other. In areas where there are flakes overlay, the irradiated radiation can be impeded, because the pigment platelets partially cover each other and thus the excitation is weakened. There are then interference effects which the emitted Attenuate radiation. Such a distribution in the paper should be chosen be that the pigment platelets do not interfere and interfere with each other.
- Figure 3 shows a similar representation where it can be seen that the pigment platelets 1 are embedded in a plastic film 6.
- the plastic film can have any thickness.
- Figure 4 shows that a printing ink 7 is arranged on a carrier 8, wherein this carrier 8 can be a value and security document.
- the pigment platelets 1 are embedded.
- the ink 7 itself should be on the emitted spectrum of the pigment platelets 1 can be adjusted to a to achieve sufficient emission radiation.
- the printing ink must also to be transparent to the stimulating as well as the emitted radiation to ensure any excitation of the pigment platelets 1 at all.
- FIG. 5 shows the integration of a Window thread in a value and security document 9. This is around a window thread 10, which is known in view of the value and Security document 9 is integrated, wherein Figure 5a shows that the Window thread 10 is recessed in the area of the label 11, and / or Has cup-shaped depressions or has recesses which with the Laser dye are filled. So that means a color is used that is doped with the pigment plate 1. Will the window thread 10 now with the stimulated appropriate light, then this printing ink comes very strong Illuminate as shown in Figure 5a.
- FIG. 6 shows a cross section through the representation according to FIG. 5, wherein it can be seen that on the paper or plastic substrate 5 one with pigment platelets 1 doped color 13 is applied.
- the metallized thread (Window thread 10) arranged, which has the microtext shown in Figure 5a.
- a geometric pattern can also be used instead of the specified text become.
- FIG. 7 shows a cross section through a fiber 15, which fiber can be a plastic thread, a textile thread, a glass thread, or the like.
- Various insertion options for the pigment platelets 1 according to the invention are shown here at different locations on this fiber 15.
- the fiber cladding 14 has a different optical refractive power than, for example, the fiber 15 itself.
- a fiber cladding 14 which allows total reflection, ensures that the light incident on the outside of the fiber cladding 14 passes through the fiber cladding 14 practically without reflection and enters the fiber 15, where there is a particularly favorable excitation of the pigment platelets arranged there 1 is coming.
- the invention is not based on the integration of such pigment platelets 1 in such a fiber 15 is limited. It is in a further development of the invention suggested that instead of the pigment platelets, the laser dyes in molecular Distribution can be introduced directly into the material of the fiber 15. Instead of Pigment platelets 1 which are shown in FIG. 7 then occur directly before mentioned laser dyes 3 in molecular distribution. To now one corresponding resonance excitation of these laser dyes 3 in the fiber 15 ensure it is provided according to Figure 7a that the end faces 17, 18th this fiber 15 are mirrored. Now such a fiber 15 from the outside excited with a suitable radiation, then there is a pumping process between the end faces 17, 18 through the fiber 15, where now through the arranged in molecular distribution laser dyes 3 directly to light up to be brought. Corresponding emitted laser radiation then occurs on the End faces 17, 18, as is known in a fiber laser.
- FIG. 8 shows the integration of a printing ink 7 on a paper 5, the the aforementioned pigment platelets in so-called polymer casings 19 are arranged.
- Pigment platelets are therefore in a matrix, a polymer shell 19, and this acts like a microencapsulation on the pigment platelets, which can thereby be integrated into the printing ink 7 at low cost.
- the polymer shell 19 also serves as a support for an electroluminescent excitable pigment 20 can serve. This has the advantage that with the excitation of the printing ink 7 by means of a suitable pigment radiation, first light up the pigment platelets 1. Becomes a pigment 20 that can be excited via electroluminescence is additionally used or another security pigment, then an additional one Radiation are generated, which is superimposed on the other radiation.
- Pigments 20 can be, for example, by a corresponding electrostatic Field are brought to light, and their radiation can that of the Pigment platelets 1 emitted radiation are superimposed.
- the wavelength of the light emitted by the pigments 20 may change due to the Shift laser emission of pigment platelets 1. It comes to one improved security effect of this arrangement because these are mutually exclusive superimposing radiation is very difficult to imitate.
- a plastic card 21 is shown in the known manner when illuminated with daylight, which has a photo area 22 and a labeling field 23. If this plastic card 21 is irradiated with laser light, the appearance according to FIG. 10 results. The laser light is used to excite hidden features.
- a first security element 24 is present, which is applied into the inscription space via the photo area 22. In the exemplary embodiment, it consists of three different sector colors 25, which complement each other to form a circle, which consequently only light up when excited with the aforementioned laser light.
- a window thread 10 is also shown, which extends through both the photo surface 22 and the labeling field 23 and other surfaces of the plastic card 21.
- This window thread can also have the aforementioned microtext; it can be designed to be illuminated.
- the printing thread 26 can not only consist of a metallized thread, but which is printed in the form of a print and extends over the image and the labeling field in order to make forgeries visible in these areas.
- another security element 27 is shown in the form of a geometric element, which, for. B. is suitable for machine evaluation.
- FIGS. 11 and 12 Another example of a personal document 28 is shown in FIGS. 11 and 12 differently concealed features. It's another one Photo area 22 and a labeling field 23 available. In Figure 12 it can be seen that two overlapping printing threads 26 are provided, both the Cover photo area 22 as well as labeling field 23. As another Example is the name of the holder of the personal document with a provided illuminating bar 29, which was overprinted with a printing ink, in which the pigment platelets 1 were distributed.
- a bank note 30 which has a certain number of known features when illuminated with daylight.
- the security feature 31 which lights up in different colors in the form of a rosette, has now been excited accordingly with the laser light.
- z. B. also for the number field 32, which then lights up in a different color compared to the number field recognizable in daylight.
- the value field 33 is overprinted with the same number but shifted to it, which lights up when excited with a laser of the corresponding color and energy. It is also an additional security element.
- a total of 3 different detection options are provided for the laser dyes shown here.
- the laser dyes shown here show fluorescence in the UV range. If the pigment platelets 1 provided with the laser dyes are excited, then the previously described sharp emission lines in the emission spectrum occur due to the resonance phenomena described. Such an emission spectrum is now extremely suitable for machine evaluation of the authenticity features of such value and security documents.
- a number of security features can be queried and evaluated, such as.
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Description
Die Herstellung solcher Resonatoren für Anwendungen in Sicherheitsdruckprodukten ist z.B. mittels Dünnschicht-Technologie machbar. Nach dem Abscheiden der einzelnen, µm-dicken Schichten, d.h. mindestens einer reflektierenden Schicht, einer Schicht mit Farbstoffen und einer weiteren, reflektierenden Schicht, auf einem Foliensubstrat wird der Schichtverbund z.B. durch Brechen zerkleinert. Die auf diese Weise erhaltenen, flächenförmigen Bruchstücke die im weiteren auch als Flakes oder Pigment-Plättchen bezeichnet werden, mit einer Dicke von 1 - 10 µm und einer Fläche < 20 x 20 µm2, können dann je nach Größe in entsprechende Druckfarben (z.B. Stahlstich, Siebdruck, Offset, Buchdruck) oder in das Papier und Folienmaterial des Sicherheitsdokumentes integriert werden.
In den folgenden Abschnitten werden Möglichkeiten der Einbringung der Laserfarbstoffe in unterschiedliche Komponenten von Sicherheits- und Wertprodukten beschrieben.
- Figur 1:
- schematisiert ein grundsätzlicher Aufbau eines Pigment-Plättchens, welche in ein nicht näher dargestelltes Wert- und Sicherheitsdokument eingebettet ist, oder welches in eine entsprechende Farbe eingebettet ist, die auf dem Wert- oder Sicherheitsdokument aufgedruckt oder angebracht ist;
- Figur 2:
- zeigt die Einbringung derartiger Pigment-Plättchen nach Figur 1 in ein Papier;
- Figur 3:
- zeigt die Einbringung derartiger Pigment-Plättchen in eine Kunststoffolie;
- Figur 4:
- zeigt die Einbringung derartiger Pigment-Plättchen in eine Farbe zum Bedrucken von Papier- oder Kunststoffolien;
- Figur 5:
- zeigt einen laseranregbaren Fensterfaden in einem Wert- und Sicherheitsdokument;
- Figur 6:
- schematisiert einen Schnitt durch das Dokument nach Figur 5;
- Figur 7:
- Querschnitt durch eine Faser mit Einbringung der Pigment-Plättchen;
- Figur 8:
- der Querschnitt durch den oberen Teil eines Wert- oder Sicherheitsdokumentes mit in eine Druckfarbe eingebrachten Pigment-Plättchen;
- Figur 9:
- die Anwendung der erfindungsgemäßen Technik bei einer Kunststoffkarte mit Beleuchtung bei Tageslicht;
- Figur 10:
- die gleiche Darstellung wie Figur 9 bei Beleuchtung mit Laserlicht;
- Figur 11:
- Darstellung eines Personaldokumentes bei Beleuchtung mit Tageslicht;
- Figur 12:
- Die gleiche Darstellung des Dokumentes bei Beleuchtung mit Laserlicht;
- Figur 13:
- Eine Banknote bei Beleuchtung mit Tageslicht;
- Figur 14:
- Die Beleuchtung der gleichen Banknote mit Laserlicht;
Ebenso ist es möglich, die Pigment-Plättchen 1 direkt in die Faser 15 einzubringen oder auch in einen Faserhohlraum 16. Hierbei kann es vorgesehen sein, daß der Fasermantel 14 ein anderes optisches Brechungsvermögen hat als beispielsweise die Faser 15 selbst. Wenn beispielsweise ein Fasermantel 14 verwendet wird, der eine Totalreflextion gestattet, wird dafür gesorgt, daß das auf die Außenseite des Fasermantel 14 eintreffende Licht praktisch ohne Reflexion den Fasermantel 14 durchtritt und in die Faser 15 eintritt, wo es zu einer besonders günstigen Anregung der dort verteilt angeordneten Pigment-Plättchen 1 kommt.
Wird diese Kunststoffkarte 21 mit Laserlicht bestrahlt, dann ergibt sich das Aussehen nach Figur 10. Das Laserlicht wird zur Anregung versteckter Merkmale verwendet. Hierbei ist ein erstes Sicherheitselement 24 vorhanden, das über die Fotofläche 22 in den Beschriftungsraum hinein aufgebracht ist. Es besteht im Ausführungsbeispiel aus drei unterschiedlichen sich zu einem Kreis ergänzenden Sektorfarben 25, die demzufolge nur bei der Anregung mit dem genannten Laserlicht aufleuchten.
Es ist ferner ein Fensterfaden 10 dargestellt, der sowohl die Photofläche 22, als auch das Beschriftungsfeld 23 und noch übrige Flächen der Kunststoffkarte 21 durchgreift. Auch dieser Fensterfaden kann den vorher erwähnten Mikrotext aufweisen; er kann in sich aufleuchtbar ausgebildet sein.
Das gleiche gilt für den Druckfaden 26, der nicht nur aus einem metallisierten Faden bestehen kann, sondern der in Form eines Druckes aufgedruckt ist und über das Bild und das Beschriftungsfeld reicht, um Fälschungen in diesen Bereichen sichtbar zu machen.
Als letztes ist beispielsweise ein weiteres Sicherheitselement 27 in Form eines geometrischen Elementes gezeigt, welches z. B. für eine maschinelle Auswertung geeignet ist.
Bei Beleuchtung mit einem geeigneten Laser zur Anregung der verwendeten Laserfarbstoffe ist erkennbar, daß das Sicherheitsmerkmal 31, welches in Form einer Rosette verschiedenfarbig aufleuchtet, nun entsprechend mit dem Laserlicht angeregt wurde. Gleiches gilt z. B. auch für das Zifferfeld 32, welches dann im Vergleich zu dem bei Tageslicht erkennbaren Ziffernfeld in anderer Farbe aufleuchtet. Ferner ist erkennbar, daß das Wertfeld 33 mit der gleichen Zahl aber verschoben hierzu überdruckt ist, die bei Anregung mit einem Laser der entprechenden Farbe und Energie aufleuchtet. Es handelt sich also auch hier um ein zusätzliches Sicherheitselement.
Es sind insgesamt bei den hier dargestellten Laserfarbstoffen 3 verschiedene Möglichkeiten der Detektion vorgesehen. Zunächst zeigen die hier dargestellten Laserfarbstoffe eine Fluoreszenz im UV-Bereich.
Werden die mit dem Laserfarbstoffen versehenen Pigment-Plättchen 1 angeregt, dann kommt es aufgrund der beschriebenen Resonanzerscheinungen zu den vorher beschriebenen scharfen Emissionslinien im Emissionsspektrum. Ein derartiges Emissionsspektrum eignet sich nun ausgezeichnet für eine maschinelle Auswertung der Echtheitsmerkmale derartiger Wert- und Sicherheitsdokumente. Es können eine Reihe von Sicherheitsmerkmalen abgefragt und ausgewertet werden, wie z. B. Wellenlänge der emittierten Strahlungspeaks, gegenseitige Position der Peaks, Halbwertbreite, Peakanzahl und Peakamplitude. Diese Parameter sind abhängig von der verwendten Laserfarbe, der Anregungsenergie und den Materialien in welchen die Laserfarbe eingebettet ist.
- 1
- Pigment-Plättchen
- 2
- reflektierende Schicht
- 3
- Laserfarbstoff
- 4
- Polymerschicht
- 5
- Papier
- 6
- Kunststoffolie
- 7
- Druckfarbe
- 8
- Träger
- 9
- Wert- und Sicherheitsdokument
- 10
- Fensterfaden
- 11
- Beschriftungen
- 12
- Papierschicht
- 13
- Farbstoffschicht
- 14
- Fasermantel
- 15
- Faser
- 16
- Faserhohlraum
- 17
- Stirnfläche
- 18
- Stirnfläche
- 19
- Polymerhülle
- 20
- Pigment
- 21
- Kunststoffkarte
- 22
- Photofläche
- 23
- Beschriftungsfeld
- 24
- Sicherheitselement
- 25
- Sektorfarbe
- 26
- Druckfäden
- 27
- Sicherheitselement
- 28
- Personaldokument
- 29
- Balken
- 30
- Banknote
- 31
- Sicherheitsmerkmal
- 32
- Ziffernfeld
- 33
- Wortfeld
- 34
- Zahl
Claims (11)
- Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung, wobei die Farbstoffe auf das Wert- und Sicherheitsdokument aufgebracht oder in dieses eingebracht sind,
dadurch gekennzeichnet, daß die Farbstoffe (3) in einem Trägermaterial (4, 5, 6, 7) eingebettet sind und zusammen mit diesem ein laseraktives Element bilden, wobei die Farbstoffe (3) in einen Resonator eingebettet sind, der aus einer beidseitigen Beschichtung der den Farbstoff enthaltenden Trägermaterialschicht (4) mit reflektierenden Schichten (2) besteht. - Wert- und Sicherheitsdokument nach Anspruch 1, dadurch gekennzeichnet, daß sich die bei verschiedenen Wert- und Sicherheitsdokumenten verwendeten Farbstoffe (3) in ihrem Emissionsverhalten unterscheiden, und dadurch eine zuverlässige Unterscheidung der verschiedenen Wert- und Sicherheitsdokumente möglich ist.
- Wert- und Sicherheitsdokument nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sich die bei verschiedenen Wert- und Sicherheitsdokumenten verwendeten Resonatoren in ihrer Geometrie und/oder den verwendeten Materialien unterscheiden, und dadurch eine zuverlässige Unterscheidung der verschiedenen Wert- und Sicherheitsdokumente möglich ist.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß die Farbstoffe (3) direkt in eine Schicht und/oder Drucklage des Wert- und Sicherheitsdokuments eingebracht sind, wobei die reflektierenden Schichten Teile des Wert- und Sicherheitsdokuments (9) darstellen.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß die Farbstoffe (3) in Pigment-Plättchen (1) eingebettet ist, die aus einer mit dem Laserfarbstoff dotierten Trägerschicht (4) und zwei im wesentlichen parallelen, die Trägerschicht zwischen sich aufnehmenden reflektierenden Schichten (2) aufgebaut sind.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß der Farbstoffe (3) in Pigment-Kugeln eingebettet ist, die aus einem mit dem Laserfarbstoff dotierten Trägermaterial und einer das Trägermaterial umgebenden reflektierenden Schicht aufgebaut sind.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß das Trägermaterial (4-7) ein geeignetes sowohl für die anregende Wellenlänge als auch für die emittierende Wellenlänge transparentes Material ist.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 7, daß die Farbstoffe (3), Pigment-Plättchen (1), -Stäbchen oder -Kugeln mit geeigneten Materialien (19) mikroverkapselt sind.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 8, daß die Farbstoffe (3), Pigment-Plättchen (1), -Stäbchen oder -Kugeln direkt in die Farbbestandteile einer Druckfarbe (7) eingebracht sind.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 9, daß die Farbstoffe (3), Pigment-Plättchen (1), -Stäbchen oder -Kugeln direkt in das Papier (5) und/oder Kunststoffsubstrat (6) des Wert- und Sicherheitsdokuments eingebracht sind.
- Wert- und Sicherheitsdokument nach einem der Ansprüche 1 - 10, daß die Farbstoffe (3), Pigment-Plättchen (1), -Stäbchen oder -Kugeln in die im Wert- und Sicherheitsdokument verwendeten Papierzusatzstoffe oder-zusatzelemente (10, 11, 15, 24) eingebracht sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19836813 | 1998-08-14 | ||
DE19836813A DE19836813A1 (de) | 1998-08-14 | 1998-08-14 | Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0980763A1 EP0980763A1 (de) | 2000-02-23 |
EP0980763B1 true EP0980763B1 (de) | 2003-10-15 |
Family
ID=7877485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99115363A Expired - Lifetime EP0980763B1 (de) | 1998-08-14 | 1999-08-04 | Wert- und Sicherheitsdokument mit optisch anregbaren Farbstoffen zur Echtheitsprüfung |
Country Status (4)
Country | Link |
---|---|
US (1) | US6234537B1 (de) |
EP (1) | EP0980763B1 (de) |
AT (1) | ATE251994T1 (de) |
DE (2) | DE19836813A1 (de) |
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-
1998
- 1998-08-14 DE DE19836813A patent/DE19836813A1/de not_active Withdrawn
-
1999
- 1999-08-04 AT AT99115363T patent/ATE251994T1/de not_active IP Right Cessation
- 1999-08-04 DE DE59907352T patent/DE59907352D1/de not_active Expired - Fee Related
- 1999-08-04 EP EP99115363A patent/EP0980763B1/de not_active Expired - Lifetime
- 1999-08-13 US US09/374,882 patent/US6234537B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19836813A1 (de) | 2000-02-24 |
US6234537B1 (en) | 2001-05-22 |
ATE251994T1 (de) | 2003-11-15 |
EP0980763A1 (de) | 2000-02-23 |
DE59907352D1 (de) | 2003-11-20 |
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