EP1265198A2 - Vorrichtung und Verfahren zur Untersuchung von Dokumenten - Google Patents
Vorrichtung und Verfahren zur Untersuchung von Dokumenten Download PDFInfo
- Publication number
- EP1265198A2 EP1265198A2 EP02008257A EP02008257A EP1265198A2 EP 1265198 A2 EP1265198 A2 EP 1265198A2 EP 02008257 A EP02008257 A EP 02008257A EP 02008257 A EP02008257 A EP 02008257A EP 1265198 A2 EP1265198 A2 EP 1265198A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- detector
- luminescent light
- document
- light
- detector units
- 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
Links
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- 230000003595 spectral effect Effects 0.000 claims description 37
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- 238000011156 evaluation Methods 0.000 claims description 12
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- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 2
- 238000009795 derivation Methods 0.000 claims description 2
- 238000011835 investigation Methods 0.000 abstract 1
- 230000004936 stimulating effect Effects 0.000 abstract 1
- 230000000638 stimulation Effects 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004020 luminiscence type Methods 0.000 description 4
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 3
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 description 3
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- 238000004458 analytical method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 229910052732 germanium Inorganic materials 0.000 description 2
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000010183 spectrum analysis Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229940056932 lead sulfide Drugs 0.000 description 1
- 229910052981 lead sulfide Inorganic materials 0.000 description 1
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000005424 photoluminescence Methods 0.000 description 1
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Images
Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
- G07D7/1205—Testing spectral properties
Definitions
- the invention relates to a device for examining documents, in particular value, ID or security documents, with at least an excitation device for excitation of luminescent light in or on a document to be examined and at least two detector units to capture at least part of what is emitted by the document Luminescence light.
- the invention also relates to a corresponding one Method.
- ID, security or Documents of value such as Banknotes, provided with features or with suitable ones
- Printed security inks which luminescent substances contain. These are substances that e.g. by light, electric fields, Radiation or sound can be excited to emit light.
- the authenticity check usually includes the documents to be checked Illuminated light of a certain spectral range and that of the luminescent Substances of the document emitted luminescent light are detected. Based on the intensity and / or spectral characteristics of the emitted Luminescent light can then be determined if the document is genuine or is fake.
- the reliability of statements about the authenticity of the checked documents is particularly dependent on the accuracy with which is the spectral characteristic, i.e. the color of the luminescent light is analyzed.
- Such an analysis can be done, for example, by spectrometers take place, which, however, a relatively high technical effort as well require high manufacturing costs. Therefore provide a simpler solution individual detector units, e.g. Photodiodes or photomultipliers, with different spectral sensitivity.
- the detector units deliver different Detector signals, which are then used for the spectral analysis of the luminescent light can be used.
- the invention is based on the idea that the detector units are related on the direction of that emitted by the document and on the detector units striking luminescent light are arranged one behind the other. As a result, the luminescent light strikes one after the other arranged detector units and is detected by them.
- the arrangement of the detector units according to the invention ensures that that all detector units arranged directly one behind the other emitted from a common spatial portion of the document Can capture luminescent light. Any parallax errors that occur with a laterally offset arrangement of detector units would occur, are arranged one behind the other by the arrangement of the detector units according to the invention greatly reduced. From those of the individual detector units Spectral components of the luminescent light recorded can then make statements about the luminescent properties of the document with high reliability be derived.
- At least one first detector unit for that spectral subrange of the luminescent light is permeable, which with at least one behind the second detector unit arranged in the first detector unit shall be.
- the first detector unit then becomes a first spectral one Part of the luminescent light is captured, while a second spectral Part of the luminescent light pass through the first detector unit can and detected by the second detector unit arranged behind it becomes.
- the first detector unit acts like an optical filter in front of the second detector unit behind. For certain applications it is therefore usually possible to dispense with additional optical filters.
- the detector units are preferably photodiodes, which are arranged in layers on top of each other and a so-called Form a sandwich diode. This creates a very compact arrangement of the Detector units reached.
- the detector units can also be elements which light using other physical detection principles, e.g. using the avalanche effect.
- the photodiodes or p-n junctions preferably have different ones Absorptionskanten, wherein the absorption edge at least a first Photodiode or a first p-n junction at smaller wavelengths is at least one behind the first photodiode as the absorption edge arranged second photodiode or one behind the first p-n junction arranged second p-n junction.
- a particularly simple and reliable derivation of statements about the spectral properties of the detected luminescent light from those of the Detector signals generated on the basis of individual detector units can a division of two detector signals and / or the difference of two logarithmic detector signals.
- Fig. 1 shows a preferred structure of the device according to the invention.
- a document to be examined in the example shown a bank note 10, is indicated by means of transport rollers 40 and transport belts 41 Transport device transported past the sensor system 7.
- the bank note 10 with the excitation light 15 of the light sources 12 irradiated.
- the light sources 12 are, for example, fluorescent tubes, Incandescent lamps, lasers or LEDs, which each emit light, that is suitable for the excitation of luminescent light in or on the bank note 10 is.
- the excitation light 15 is preferably ultraviolet (UV light.
- UV light ultraviolet
- luminescent light 16 in is excited or on the document by the light 15 of the light sources 12.
- a corresponding one Luminescence is therefore referred to as photoluminescence.
- it can also be by electromagnetic or electric fields, radiation or sound other types of luminescence phenomena, such as.
- Excitation devices e.g. electrical contacts or field plates, Radiation sources for cathode, ion or x-rays, Ultrasound sources or antennas.
- the excitation light 15 emitted by the respective light sources 12 at different Wavelengths or wavelength ranges. That with different Wavelengths or wavelength ranges of excited luminescent light 16 leaves even more precise statements about the luminescent properties the banknote 10 too.
- the Light sources 12 illuminate the banknote 10 either individually or in combination and this with individually or combined illuminated banknote 10 detected luminescent light 16 is evaluated. Will be in the example shown 1 first illuminated with only one light source 12, then detect the two detector units 1 and 2 a first pair of intensity values. Subsequent illumination with the other light source 12 generates a second pair of intensity values. With simultaneous lighting with Finally, a third pair of intensity values is obtained for both light sources 12. By comparing and / or arithmetically linking the here received, i.a. different, intensity values will be a particularly accurate Examination of the luminescent properties of the examined banknote 10 reached.
- the device or the method is suitable for examination of phosphorescent and fluorescent light alike.
- the luminescent light 16 excited in or on the bank note 10 is emitted by the banknote 10 emits and strikes two detector units 1 and 2, which according to the invention are arranged one behind the other that the the bank note 10 outgoing luminescent light 16 successively on the individual Detector units 1 and 2 meet and are detected by them can.
- the two detector units 1 and 2 each have different ones spectral sensitivities so that each has a different spectral component of the luminescent light 16 is detected. Accordingly differ the detector signals S generated by the detector units 1 and 2, which can be fed to an evaluation device 9 for evaluation and analysis.
- an optical device 13 which the luminescent light 16 emitted by the bank note 10 onto the detector units 1 and 2 steers, especially focused. It is preferably This is an imaging optic which covers a partial area 11 of the Banknote 10 maps to the detector units 1 and 2.
- Selfoc lenses the distance between the Banknote 10 and the detector units 1 and 2 independent and adjustment-free 1: 1 image of the portion 11 of the bank note 10 to be examined reached on the detector units 1 and 2.
- a filter 14 is arranged in front of the detector units 1 and 2, which for those spectral subregions of the luminescent light 16 is permeable, which detects with the detection units 1 and 2 should be.
- the individual detector units are as photodiodes 1 and 2 formed and related to the direction of the Document emitted luminescent light 16 arranged one behind the other.
- the individual photodiodes 1 and 2 each have a p-n junction 3/4 or 5/6 between a p-doped 3 or 5 and an n-doped 4 or 6 semiconductor layer.
- the doping profile is greatly simplified shown and generally gives not the actual proportions of the Layer thicknesses again.
- There are spacers between the photodiodes 1 and 2 8 provided to avoid electrical short circuits.
- the height of the spacers should 8 should not be chosen too large and in the order of magnitude Height of the photodiodes 1 and 2 are.
- a filter 14 in front of the photodiode 1 be arranged.
- FIGS. 3a and 3b each show a second embodiment of the invention Arrangement shown.
- FIG. 3a shows a component 20 which the detector units 1 and 2 are integrated together, wherein component 20 has two p-n junctions 22/21 and 23/21, respectively each correspond to a detector unit 1 or 2.
- the n-doped semiconductor layer 21 here forms the substrate on which the two p-n junctions 22/21 or 23/21 are applied in layers.
- the doping profile is here also shown in a very simplified form and generally gives not the actual Ratios of the layer thicknesses again. Analogous to that in figure 2 example shown here are voltages with suitable connections 17 tapped and as detector signals S to an evaluation unit (not shown).
- Figure 3b shows a variant of the second embodiment of the invention Arrangement.
- the component 30 shown comprises two layers trained p-n junctions 32/33 and 34/33, which on a common Substrate 31 are applied.
- the substrate 31 itself can be a Semiconductor or ceramic substrate. In terms of how this works The explanations for FIG. 3a apply analogously to the embodiment.
- the detector units 1 and 2 shown in FIGS. 2, 3a and 3b are chosen so that the first detector unit 1 for that spectral sub-range of the luminescent light 16 is transparent, which with the behind the first detector unit 1 arranged second detector unit 2 can be detected should.
- Detector units 1 and 2 have different absorption edges on, wherein the absorption edge of the first photodiode 1 and first p-n transition 3/4, 32/33 or 22/21 at smaller wavelengths lies as the second absorption edge behind the first photodiode 1 or the first p-n transition 3/4, 32/33 or 22/21 arranged second Photodiode 2 or second p-n junction 5 / 6.34 / 33 or 23/21.
- Detector units 1 and 2 one above the other become the respective p-n junctions 3/4 or 5/6 preferably on different semiconductor materials realized.
- a photodiode based on silicon (Si) and for the second detector unit 2 a photodiode based on germanium (Ge) is used.
- wavelength below about a micron can then be from the photodiode 1 can be detected on the basis of silicon during wavelengths penetrate this photodiode 1 above about a micrometer and from the photodiode 2 arranged behind it on the basis of Germanium can be detected.
- photodiodes can be used based on silicon and indium gallium arsenide (InGaAs) or silicon and lead sulfide (PbS) can be combined to make the luminescent light 16 to be detected in two different spectral subregions.
- InGaAs indium gallium arsenide
- PbS lead sulfide
- B. the combination of several corresponding photodiodes possible, e.g. B. from silicon, indium gallium arsenide and lead sulfide.
- FIGS. 3a and 3b Arrangement is the different permeability or sensitivity of the detector units 1 and 2 by selecting suitable ones Semiconductor materials and / or a corresponding doping of the respective material reached.
- a corresponding component 20 or 30 leaves can be realized, for example, on the basis of silicon, the first p-n junction 22/21 or 32/33 due to a lower penetration depth for short-wave Light is particularly sensitive. However, long-wave light can penetrate deeper into the layer system and of the stronger in the long-wave Spectral range sensitive second p-n transition 23/21 and 34/33 detected become.
- FIG. 4 shows an example for different spectral sensitivities E. of the detector units 1 and 2 shown in FIGS. 2 and 3 can be seen from the diagram, the spectral sensitivity E1 is the first detector unit 1 in the region of short wavelengths ⁇ , while the spectral sensitivity E2 behind the first detector unit 1 arranged second detector unit 2 at higher wavelengths ⁇ their Maximum reached.
- the respective behavior is complementary to this spectral permeability of the detector units 1 and 2.
- the spectral The transmittance of the detector unit 1 is accordingly at higher wavelengths ⁇ greatest, so that the luminescent light in this partial area of the Spectrum can penetrate the detector unit 1 and finally by the Detector unit 2 can be detected.
- Figure 5 shows a circuit diagram of the second shown in Figures 3a and 3b Embodiments.
- Detector units 1 and 2 i.e. the corresponding p-n junctions 22/21 and 23/21 or 32/33 and 34/33, of the component 20 and 30 are oppositely connected in series photodiodes shown, the cathodes of a common potential 18th lie.
- the signals S1 and S2 fed to an evaluation device 9.
- the signals S1 and S2 are each in a logarithmic amplifier 28 logarithmically amplified and then to a differential amplifier 29 laid.
- the spectral properties of the lunimescent light 16, in particular the Wavelength, e.g. the central wavelength, and / or the wavelength range and / or the color can not only be visible according to the invention Spectral range, but also in invisible spectral ranges, such as e.g. in the infrared or ultraviolet, can be detected and analyzed.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
Description
- Fig. 1
- einen bevorzugten Aufbau der erfindungsgemäßen Vorrichtung;
- Fig. 2
- eine erste Ausführungsform der erfindungsgemäß angeordneten Detektoreinheiten;
- Fig. 3
- a) und b) jeweils eine zweite Ausführungsform der erfindungsgemäß angeordneten Detektoreinheiten;
- Fig. 4
- Beispiele für spektrale Empfindlichkeiten der in Fig. 2 bzw. Fig. 3 dargestellten Detektoreinheiten; und
- Fig. 5
- ein Schaltbild der in Fig. 3 dargestellten zweiten Ausführungsform der erfindungsgemäß angeordneten Detektoreinheiten.
Claims (24)
- Vorrichtung zur Untersuchung von Dokumenten, insbesondere Wert-, Ausweis- oder Sicherheitsdokumenten, mitmindestens einer Anregungseinrichtung zur Anregung von Lumineszenzlicht (16) in oder auf einem zu untersuchenden Dokument (10) undmindestens zwei Detektoreinheiten (1, 2) zur Erfassung zumindest eines Teils des von dem Dokument (10) emittierten Lumineszenzlichts (16),
die Detektoreinheiten (1, 2) bezogen auf das von dem Dokument (10) emittierte Lumineszenzlicht (16) hintereinander angeordnet sind. - Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Anregungseinrichtung mindestens eine Lichtquelle (12) zur Beleuchtung des Dokuments (10) mit Anregungslicht (15), welches zur Anregung von Lumineszenzlicht (16) in oder auf dem Dokument (10) geeignet ist, umfaßt.
- Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß die Detektoreinheiten (1, 2) unterschiedliche spektrale Empfindlichkeiten (E1, E2) aufweisen.
- Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß mindestens eine erste Detektoreinheit (1) für mindestens einen spektralen Teilbereich des Lumineszenzlichts (16) durchlässig ist, welcher mit mindestens einer hinter der ersten Detektoreinheit (1) angeordneten zweiten Detektoreinheit (2) erfaßt werden kann.
- Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Detektoreinheiten (1, 2) als Photodioden ausgebildet sind.
- Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß zumindest zwischen zwei Photodioden mindestens ein optisches Filter angeordnet ist.
- Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Detektoreinheiten (1, 2) auf einem gemeinsamen Bauelement (20, 30) integriert sind.
- Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß das Bauelement (20, 30) mindestens zwei photoempfindliche Schichten, insbesondere p-n-Übergänge (22/21, 23/21, 32/33, 34/33), umfaßt, wobei jeder photoempfindlichen Schicht, insbesondere jedem p-n-Übergang (22/21, 23/21, 32/33, 34/33), jeweils eine Detektoreinheit (1, 2) entspricht.
- Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die photoempfindlichen Schichten, insbesondere p-n-Übergänge (22/21, 23/21, 32/33, 34/33), schichtartig ausgebildet und auf einem gemeinsamen Substrat (21, 31), insbesondere einem Halbleiter- oder Keramiksubstrat, aufgebracht sind.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß die photoempfindlichen Schichten, insbesondere p-n-Übergänge (22/21, 23/21, 32/33, 34/33), bezogen auf das von dem Dokument (10) emittierte Lumineszenzlicht (16) schichtweise übereinander angeordnet sind.
- Vorrichtung nach einem der Ansprüche 5 bis 10, dadurch gekennzeichnet, daß die Photodioden bzw. p-n-Übergänge (22/21, 23/21, 32/33, 34/33) unterschiedliche Absorptionskanten aufweisen und die erste Absorptionskante mindestens einer ersten Photodiode bzw. mindestens eines ersten p-n-Übergangs (22/21, 32/33) bei kleineren Wellenlängen (λ) liegt als die zweite Absorptionskante mindestens einer hinter der ersten Photodiode angeordneten zweiten Photodiode bzw. mindestens eines hinter dem ersten p-n-Übergang (22/21, 32/33) angeordneten zweiten p-n-Übergangs (23/21, 34/33).
- Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß eine optische Einrichtung (13) zur Lenkung des von dem Dokument (10) ausgehenden Lumineszenzlichts (16) auf die Detektoreinheiten (1, 2) vorgesehen ist.
- Vorrichtung nach Anspruch 12, dadurch gekennzeichnet, daß die optische Einrichtung (13) mindestens eine Linse, insbesondere eine selbstfokussierende Linse, zur Fokussierung des von dem Dokument (10) ausgehenden Lumineszenzlichts (16) auf die Detektoreinheiten (1, 2) umfaßt.
- Vorrichtung nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß eine Auswerteeinrichtung (9) vorgesehen ist zur Ableitung von Aussagen über die spektralen Eigenschaften, insbesondere über die Wellenlänge, wie z.B. die Zentralwellenlänge, und/oder den Wellenlängen-bereich und/oder die Farbe, des erfaßten Lumineszenzlichts (16) aus von den Detektoreinheiten (1, 2) erzeugten Detektorsignalen (S, S1, S2).
- Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß die Auswerteeinrichtung (9) einen logarithmischen Verstärker (28) zur Logarithmierung einzelner Detektorsignale (S, S1, S2) umfaßt.
- Vorrichtung nach einem der Ansprüche 14 bis 15, dadurch gekennzeichnet, daß die Auswerteeinrichtung (9) einen Differenzverstärker (29) zur Bildung der Differenz zwischen zwei Detektorsignalen (S, S1, S2) oder zwischen zwei logarithmierten Detektorsignalen (S, S1, S2) umfaßt.
- Vorrichtung nach einem der Ansprüche 14 bis 16, dadurch gekennzeichnet, daß die Auswerteeinrichtung (9) zur Ableitung von Aussagen über die spektralen Eigenschaften, insbesondere über die Wellenlänge, wie z.B. die Zentralwellenlänge, und/oder den Wellenlängenbereich und/oder die Farbe, des erfaßten Lumineszenzlichts (16) auf der Basisder Division von zwei Detektorsignalen (S, S1, S2) und/oderder Differenz von zwei logarithmierten Detektorsignalen (S, S1, S2) ausgebildet ist.
- Verfahren zur Untersuchung von Dokumenten, insbesondere Wert-, Ausweis- oder Sicherheitsdokumenten, bei welchemein zu untersuchendes Dokument (10) zur Emission von Lumineszenzlicht (16) angeregt wird undzumindest ein Teil des von dem Dokument (10) emittierten Lumineszenzlichts (16) von mindestens zwei Detektoreinheiten (1, 2) erfaßt wird,
das Lumineszenzlicht (16) nacheinander auf die hintereinander angeordneten Detektoreinheiten (1, 2) trifft und dabei von diesen erfaßt wird. - Verfahren nach Anspruch 18, dadurch gekennzeichnet, daß das Dokument (10) mit Anregungslicht (15), welches zur Anregung von Lumineszenzlicht (16) in oder auf dem Dokument (10) geeignet ist, beleuchtet wird.
- Verfahren nach einem der Ansprüche 18 bis 19, dadurch gekennzeichnet, daß das Lumineszenzlicht (16) von Detektoreinheiten (1, 2) mit unterschiedlichen spektralen Empfindlichkeiten (E1, E2) erfaßt wird.
- Verfahren nach einem der Ansprüche 18 bis 20, dadurch gekennzeichnet, daß mindestens ein spektraler Teilbereich des Lumineszenzlichts (16) mindestens eine erste Detektoreinheit (1) durchläuft und von mindestens einer hinter der ersten Detektoreinheit (1) angeordneten zweiten Detektoreinheit (2) erfaßt wird.
- Verfahren nach einem der Ansprüche 18 bis 21, dadurch gekennzeichnet, daß die Detektoreinheiten (1, 2) Detektorsignale (S, S1, S2) erzeugen und aus den Detektorsignalen (S, S1, S2) Aussagen über die spektralen Eigenschaften, insbesondere über die Wellenlänge, wie z.B. die Zentralwellenlänge, und/oder den Wellenlängenbereich und/oder die Farbe, des erfaßten Lumineszenzlichts (16) abgeleitet werden.
- Verfahren nach Anspruch 22, dadurch gekennzeichnet, daß die Ableitung von Aussagen über die spektralen Eigenschaften, insbesondere über die Wellenlänge, wie z.B. die Zentralwellenlänge, und/oder den Wellenlängenbereich und/oder die Farbe, des erfaßten Lumineszenzlichts (16) auf der Basisder Division von zwei Detektorsignalen (S, S1, S2) und/oderder Differenz von zwei logarithmierten Detektorsignalen (S, S1, S2) erfolgt.
- Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß mindestens zwei Lichtquellen (12) vorgesehen sind, wobei das Anregungslicht (15) der jeweiligen Lichtquellen (12) bei unterschiedlichen Wellenlängen oder in unterschiedlichen Wellenlängenbereichen liegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10127837A DE10127837A1 (de) | 2001-06-08 | 2001-06-08 | Vorrichtung und Verfahren zur Untersuchung von Dokumenten |
DE10127837 | 2001-06-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1265198A2 true EP1265198A2 (de) | 2002-12-11 |
EP1265198A3 EP1265198A3 (de) | 2005-01-12 |
EP1265198B1 EP1265198B1 (de) | 2019-10-30 |
Family
ID=7687623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02008257.4A Expired - Lifetime EP1265198B1 (de) | 2001-06-08 | 2002-04-19 | Vorrichtung und Verfahren zur Untersuchung von Dokumenten |
Country Status (3)
Country | Link |
---|---|
US (1) | US6777704B2 (de) |
EP (1) | EP1265198B1 (de) |
DE (1) | DE10127837A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004104947A2 (de) * | 2003-05-23 | 2004-12-02 | Giesecke & Devrient Gmbh | Vorrichtung zur prüfung von banknoten |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004035494A1 (de) * | 2004-07-22 | 2006-02-09 | Giesecke & Devrient Gmbh | Vorrichtung und Verfahren zur Prüfung von Wertdokumenten |
AU2012203003B2 (en) * | 2004-07-22 | 2013-04-11 | Giesecke+Devrient Currency Technology Gmbh | Device and method for verifying value documents |
DE102004039049A1 (de) * | 2004-08-11 | 2006-02-23 | Giesecke & Devrient Gmbh | Verfahren und Vorrichtung zum Messen von Blattgut |
US8263948B2 (en) * | 2009-11-23 | 2012-09-11 | Honeywell International Inc. | Authentication apparatus for moving value documents |
EP2517064A2 (de) * | 2009-12-22 | 2012-10-31 | Miao Zhang | Beleuchtungsverfahren und systeme zur verbesserung der bildauflösung von bildgebungssystemen |
DE102010047061A1 (de) * | 2010-09-30 | 2012-04-05 | Carl Zeiss Microlmaging Gmbh | Optisches Weitbereichsspektrometer |
AU2012266827B2 (en) * | 2011-06-06 | 2015-11-26 | Sicpa Holding Sa | In-line decay-time scanner |
DE102011106523A1 (de) * | 2011-07-04 | 2013-01-10 | Giesecke & Devrient Gmbh | Prüfgerät und Verfahren zur Kalibrierung eines Prüfgeräts |
US10452908B1 (en) | 2016-12-23 | 2019-10-22 | Wells Fargo Bank, N.A. | Document fraud detection |
US11467087B2 (en) | 2017-03-27 | 2022-10-11 | Glory Ltd. | Optical sensor, light detection apparatus, sheet processing apparatus, light detection method, and phosphorescence detection apparatus |
DE102018109141A1 (de) * | 2018-04-17 | 2019-10-17 | Bundesdruckerei Gmbh | Smartphone verifizierbares, leuchtstoffbasiertes Sicherheitsmerkmal und Anordnung zur VerifizierungSmartphone verifizierbares, leuchtstoffbasiertes Sicherheitsmerkmal und Anordnung zur Verifizierung |
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EP0083062A2 (de) * | 1981-12-24 | 1983-07-06 | Kabushiki Kaisha Toshiba | Gerät zur Überprüfung von Druckerzeugnissen |
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EP0716538A2 (de) * | 1994-12-06 | 1996-06-12 | Canon Kabushiki Kaisha | Bildaufnahmevorrichtung |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2004104947A2 (de) * | 2003-05-23 | 2004-12-02 | Giesecke & Devrient Gmbh | Vorrichtung zur prüfung von banknoten |
DE10323410A1 (de) * | 2003-05-23 | 2004-12-09 | Giesecke & Devrient Gmbh | Vorrichtung zur Prüfung von Banknoten |
WO2004104947A3 (de) * | 2003-05-23 | 2005-01-06 | Giesecke & Devrient Gmbh | Vorrichtung zur prüfung von banknoten |
US7504632B2 (en) | 2003-05-23 | 2009-03-17 | Giesecke & Devrient Gmbh | Apparatus for checking banknotes |
Also Published As
Publication number | Publication date |
---|---|
EP1265198A3 (de) | 2005-01-12 |
EP1265198B1 (de) | 2019-10-30 |
DE10127837A1 (de) | 2003-01-23 |
US6777704B2 (en) | 2004-08-17 |
US20020185615A1 (en) | 2002-12-12 |
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