EP0466119B1 - Méthode et dispositif pour l'examen de documents - Google Patents

Méthode et dispositif pour l'examen de documents Download PDF

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Publication number
EP0466119B1
EP0466119B1 EP91111438A EP91111438A EP0466119B1 EP 0466119 B1 EP0466119 B1 EP 0466119B1 EP 91111438 A EP91111438 A EP 91111438A EP 91111438 A EP91111438 A EP 91111438A EP 0466119 B1 EP0466119 B1 EP 0466119B1
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EP
European Patent Office
Prior art keywords
light
document
fluorescent
light guide
switch
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
Application number
EP91111438A
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German (de)
English (en)
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EP0466119A2 (fr
EP0466119A3 (en
Inventor
Bernd Wunderer
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GAO Gesellschaft fuer Automation und Organisation mbH
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GAO Gesellschaft fuer Automation und Organisation mbH
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Publication of EP0466119A2 publication Critical patent/EP0466119A2/fr
Publication of EP0466119A3 publication Critical patent/EP0466119A3/de
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Publication of EP0466119B1 publication Critical patent/EP0466119B1/fr
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Classifications

    • 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
    • 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
    • G07D7/121—Apparatus characterised by sensor details

Definitions

  • the invention relates to a device or a Procedure for checking documents with a control unit and a scanner for recording the from Document remitted and / or by the document transmitted light.
  • banknotes are counted, checked and sorted almost only with fully automatic sorting and testing machines. These machines recognize or check the banknotes based on various criteria. Preferred test criteria are the size, the thickness and the printed image of the Grades. Most of the measurements on the printed image take place Cases by means of electro-optical processes, this is the banknote over the entire surface or in predetermined surface areas scanned with electro-optical sensors. The so obtained measurement signals are either directly or after signal processing with predefined acceptance ranges compared. The comparison result is mostly along with the results of further measurements for assessment the banknote used.
  • CH-PS 476 356 describes a device which in As part of the optical check, banknotes also on your checks characteristic color shades. For testing the banknote in a limited area Light from a broadband light source is illuminated. The reflected light is here in an optical Cutting system, such as a glass prism, in different wavelength ranges separated. The in the Color brightness present in the respective wavelength ranges comes with several, assigned photoelectric Detectors recorded. The measurement signals are in Threshold levels evaluated so that if they match a correct signal of the measured values with the tolerance ranges is delivered.
  • DE-OS 38 15 375 describes a device for testing the authenticity of documents based on color.
  • the device is composed of several similar modules.
  • Each module consists of a lighting system consisting of light guides and a photo sensor. Specific Optical components such as color filters ensure that each module only in a selected spectral range is sensitive.
  • the document is sent to the Guided past modules; the photo sensors of the Modules line the document in different predetermined lines Spectral ranges and forward the measured values to Evaluation device further.
  • each spectral range the modules with all the necessary components to provide multiple times what besides the big one Construction volume for a noticeable increase in the price of the machines leads, especially if - as suggested in the DE-OS - expensive fiber bundles used as light guides will.
  • the use of filters for spectral separation the light component not only increases the cost of the testing device, but also worsens efficiency between that available on the measuring surface Light output to the irradiated light output.
  • the invention has for its object a device and a corresponding method for optical Examination of documents in at least two spectral ones Propose areas, the above disadvantages be avoided.
  • An essential feature of the solution according to the invention is in that to illuminate the document with light different spectral ranges one with fluorescent material provided light guide is used, the at the same time as a light guide for other radiation sources is being used.
  • fluorescent material Light guides for example so-called fluorescent plates, have been known for a long time. They consist of a transparent plastic in which fluorescent Dye molecules are stored. Acting on the plate Light is absorbed by the molecules and generally emitted again as longer-wave light. The light emitted in the plate in all spatial directions becomes to a large extent in the plate via total reflections collected and occurs at the plate edges as High intensity fluorescent light.
  • Fluorescent plates can be a document on very simple Way with light of a first spectral range with large Illuminated intensity and very homogeneous distribution will.
  • the fluorescent plate only serves as Light guide.
  • the light from this second spectral source will coupled over one of the edges or narrow sides of the plate and occurs over total reflections in the plate on another edge.
  • Spectral range are preferably light emitting diodes used. Due to their design, LEDs emit light their light in a limited solid angle range, whereby effective coupling of light into the light guide can be achieved.
  • the light from the second spectral source can also from a second fluorescent plate are generated that to the one generating the first light Plate is optically coupled.
  • the lighting geometry varies in a variety of ways will.
  • a plate-shaped light guide is a homogeneous column-shaped illumination of the security possible. That from the edge of the plate in the form of a Lobe emerging light can be used directly to illuminate the Object to be used. But it is also possible by appropriate shaping of the trailing edge, by Imaging of the trailing edge on the test object or by the superimposition of several light lobes of several exit surfaces one or more fluorescent plates set the desired lighting geometry.
  • Illuminate an area of the document with Light of different spectral ranges requires if filter arrangements are to be dispensed with, one different kind of separation of the light components to a selective To enable analysis in the spectral ranges used.
  • the different spectral sources whose Light components directly or indirectly via a common one Optical fibers are guided to the measuring point in such a way modulate that the measuring range only in one Spectral range is illuminated.
  • the spectral sources are therefore time-alternating in time-division multiplexing switched on and off, the switching frequency is chosen so high that during the run a sufficient number of measured values are recorded in a document can be.
  • Switching regulator provided in addition to a fast clocking the radiation sources are low loss automatic Enable brightness control.
  • FIG. 1 shows a first embodiment highly schematic arrangement of the device according to the invention for checking securities, for example Banknotes, using two spectral sources and one Fluorescent plate.
  • a banknote 1 in is transported by means of a transport system 6
  • the plate 3 consists of a plastic in which a fluorescent dye is homogeneously distributed. Such Plates are commercially available.
  • the immediately Fluorescent tubes 4 arranged next to the plate illuminate the surface of the plate with light of a short Wavelength. The light penetrates the plate and is absorbed by the dye; a lot of the absorbed Energy is used as fluorescent light for a longer period Wavelength as the absorbed again emitted.
  • the spectrum of the fluorescent light is typical a band approximately 100 nanometers wide, depending on the dye the wavelength center of gravity is currently available Panels in a range from blue to that far red. Due to total reflection within the The fluorescent light mainly occurs on the plate Narrow sides or edges of the plate. About the loss of light to keep small, the edges of the plate that not required as entry or exit edges for the light are mirrored. For good efficiency the fluorescent lamps and the fluorescent plate are in to coordinate their spectra. Fluorescent lamps with an emission in the blue spectral range are suitable for green to red emitting fluorescent plates, while for blue emitting plates one in the ultraviolet Lamp area is preferable.
  • the fluorescent plate 3 serves simultaneously as a light guide for the second lighting device 5.
  • the fluorescent plate 3 for an effective light coupling this directly above the leading edge 7 of the plate, optionally arranged via optical coupling media.
  • the light of the light emitting diodes used here for example penetrates the plate and is due to total reflection on the base and top surface to the trailing edge guided.
  • the wavelength of the diodes is to avoid of losses to choose so that they are not in an absorption band the fluorescent plate falls.
  • the light from both spectral sources leaves the plate the trailing edge 9 and causes according to the Geometry of the exit surface the homogeneous illumination a strip-shaped surface with high luminance.
  • the one that is remitted or let through from the banknote Light can be detected by several detectors 13, 14, 15 will.
  • Line detectors are preferred for this purpose used such as a CCD array.
  • the signals the detectors can be used alone or combined accordingly be evaluated.
  • the two lighting sources 4 and 5 in time-multiplexing operated, that is, they are alternating switched light and dark. Reading the Detectors are in phase with the alternating cycle; the The resulting measurement signal is therefore given alternately follow the two color separations that are saved separately and / or have it processed.
  • FIG. 2 shows an embodiment of the invention Facility used to achieve homogeneous illumination the measuring surface two symmetrically arranged Has fluorescent plates 20, 21.
  • the two plates 20, 21 around the Lighting device 4 arranged arched.
  • the light emitting diodes 24, 25 are on the narrow sides 22, 23 of the plate arranged; the phosphor source 4 illuminates the surfaces of the fluorescent plates 20, 21.
  • the inside of the support structures 38 and 39 are mirrored; this means that it is broadcast in all directions in space Light from the fluorescent source 4 onto the fluorescent plates thrown back.
  • the embodiment shown can preferably be a U-shaped fluorescent lamp be used, the observation through the gap the lamp is possible.
  • a suitable lamp for this is for example the so-called Dulux-S lamp from Osram.
  • the two trailing edges are for coupling out the light of the fluorescent plates 20, 21 beveled and possibly mirrored.
  • the slopes couple the rays of light from the plates at a certain angle and lead them to the desired area of the banknote 1.
  • the angles of the slopes can be chosen that the two exit lobes 32 and 33 of the fluorescent plates more or less strong on the banknote overlap.
  • the detector 13 is in a shaft 68 between the arranged in both lighting parts and so against stray light well protected. With one arranged in the shaft Imaging system 12 can be the desired illuminated one Area of banknote 1 mapped onto detector 13 will. To protect against dirt and damage is between the transport path of the banknotes and the Sensor arrangement a cover 40 with a window 42 assembled. To separate the color components, as in Fig. 1 already described, the spectral sources and Detector controlled in time-division multiplex mode.
  • the arrangement shown can also be used for measurement can be used in three or four spectral ranges. For example, if you swap one of the two rows of LEDs 24 or 25 against one in another Wavelength-emitting type, so stand at the measuring point three spectral colors are available. A fourth Color can be emitted by using different emitters Fluorescence molecules in the two plates 20 and Add 21.
  • FIG. 3 shows an alternative arrangement for generation of three or more spectral colors at the measuring point.
  • there are two with different fluorescent substances provided fluorescent plates 45 and 46 over their Narrow sides or edges 49 connected to one another.
  • the Surfaces of the edges and their connection are like this procure that the light can pass freely.
  • the two plates 45 and 46 are from the two fluorescent lamps 50 and 52 illuminated.
  • the two lamps with suitably shaped Surround reflectors 53.
  • the fluorescent materials of the plates and the respective excitation light are chosen so that the emission light of a plate which is directed towards the Banknotes following plate happens with as little loss as possible.
  • the plates 45, 46 also serve as Light guide for a further lighting device 48.
  • the sensor can thus be optimally metrological Adjust requirements.
  • the Brightness drops monotonically with the distance of the measuring surface.
  • a maximum brightness at a predetermined distance from Sensor can, however, by overlaying several exit lobes or by optically imaging the exit surface can be achieved. 2 already has a first example shown for the overlay principle where the zone highest brightness at some distance from the trailing edges of the fluorescent plates. In the overlay area have changes in distance between the measurement object and lighting source have less impact on changes in brightness.
  • the trailing edge of the fluorescent plate 3 is in this case over its entire length in Middle part has been provided with a mirror 56. This measure shifts the intensity maximum away from the exit surface. The diminution the absolute brightness in the measuring surface 62 due to the partial mirroring can be achieved by taking measures at the Catch the leading edge. By mirroring 57 the Leading edge has the light reflected back so Another possibility to one of the two exit windows 59 or 60 to arrive.
  • the permeability for the Light from a light source 5 are respected, for example through a wavelength selective mirroring for the fluorescent light or through a corresponding window 61 can be taken into account.
  • FIG. 5 shows a further embodiment for the Overlay principle. It is in a predetermined Distance creates an area 62 of optimal brightness and scattered light in the detector is largely avoided at the same time.
  • the two fluorescent plates 64 and 65 are in this Case arranged at 45 ° to the measuring surface, the exit surfaces 55 on both plates thus point to one common area.
  • the detector shaft 68 Between the two plates is the detector shaft 68, in which in the known imaging optical system 12 and a linear detector 13 are arranged.
  • a partial mirroring 66 of the trailing edges in connection with the symmetrical The arrangement moves zone 62 of maximum brightness away from the sensor into an area that is different from document 1 is happening.
  • the lighting devices here in the Detail, not shown, can, for example shown in Fig. 2 can be selected.
  • FIG. 6 shows a section through a symmetrical structure Sensor module, the light of the fluorescent plates 3 with imaging deflecting optics on the measuring surface is projected.
  • the color components of the light are generated in the manner already described and to the Leaving edges of the fluorescent plates 3 passed.
  • the light hits the image Deflection optics 71.
  • the deflection and imaging takes place by reflecting the light rays on the two mirrored Surfaces 73 and 74.
  • the ray path for the marginal rays the exit lobe is dotted Lines shown.
  • the light first penetrates the Glass body 71 and is on the mirrored surface 73rd reflected; surface 73 is a section of a Parabolic surface that is shaped so that the light as Parallel beam to surface 74 is reflected.
  • the Surface 74 which is also the shape of a parabolic surface has, the light focuses on the measuring surface 63.
  • Zum Protection of the vitreous against damage and dirt is a protective layer 76 with a window in the beam path inserted.
  • the focus point is due to the position of the Parabolic surfaces laterally shifted with respect to the vitreous and lies exactly under the detector shaft 68.
  • Symmetrical to the detector shaft is a mirror image second deflecting optics 72 arranged, it ensures in the measuring surface for a homogeneous and largely distance-independent Illumination. Scanning the passing Banknote 1 in the measurement area is made using a Imaging optics 12 and a line detector 13.
  • the walls 79 of the detector shaft are opaque and protect the sensor from stray light.
  • the entire optical structure of the sensor module can be extremely compact design, advantageous for assembly is the uncritical positioning of the optical components.
  • the components are - because adjustment devices are not necessary - practically during the lifetime the spectral sources are completely adjustment-free; what a good reproducibility of the measurement results guaranteed.
  • the spectral sources also have to ensure constant measuring conditions for long periods, this means, among other things, that in their Brightness should be stabilized over time.
  • the spectral sources alternate must be switched on and off so that you can go through Time-division multiplexing, for example, separate color separations who can receive banknotes.
  • special switching regulators for controlling the spectral sources suggested. These switching regulators control the Performance practically only by briefly switching on and off the power supply. But since there is one Have switch-off operations carried out practically without loss, these switching regulators set the electrical power optimally in light output. Capacitive and inductive Components in the circuit of the spectral sources ensure a largely continuous power and light flow during the switch-on phase.
  • Fig. 7 shows an embodiment of a switching regulator for the brightness-controlled operation of a Fluorescent lamp.
  • the lamp 80 is in series with one Inductance 81 on the secondary side of a transformer 82.
  • a capacitor 84 is connected in series with the directly heated electrodes.
  • the two components 81 and 84 form a series resonance circuit.
  • the Gas discharge from the lamp runs parallel to the capacity.
  • Another resonant circuit is through the primary winding of the transformer 82 with the capacitance 85 is formed.
  • a control circuit 87 controls the current flow on the Primary side via a switching transistor 89 with a such frequency and pulse shape that with minimal power consumption a given brightness is kept constant becomes.
  • the current brightness is from a photoelectric Detector 88 detects and the controller 87 as Control signal passed on.
  • control pulse SP By varying the frequency the control pulse SP can control the brightness of the fluorescent lamp be managed. With the help of another one signal I / O acting on the controller becomes the control pulse sequences and thus also the lamp on or off. It has been shown that the circuit too then still works properly when the control pulses supplied in synchronism with the I / O signal in so-called "bursts" become, which ultimately only the multiplex operation with other radiation sources is possible.
  • the I / O signal determines the on and off phases of the fluorescent lamp. In each case with a positive I / O signal there will be a consequence generated by switching pulses SP.
  • the frequency of the switching pulses becomes a brightness sensor regulated in such a way that, for example, at a Decrease the brightness by increasing the frequency Power supply to the lamp is increased.
  • the inductive and capacitive components of the circuit smooth the power flow to the lamp and ensure the duty cycle a largely constant brightness.
  • the frequency of the I / O signal is in the Size of about 10 kilohertz.
  • the frequency of the control pulses preferably chosen to be a factor of 10 higher.
  • the light emitting diodes must also be in phase opposition to the fluorescent lamp be switched on and off periodically, brightness control is also necessary.
  • a block diagram for a switching regulator that is based on the The characteristic curve of the light-emitting diodes is matched in FIG. 9 reproduced.
  • the light emitting diodes 90 are connected in series and are therefore operated with a power supply will. Because the light emission from light emitting diodes it increases approximately linearly with the through current regulated by pulse width modulation of the current will. For this is in series with the LEDs Switching transistor 95 is provided, which is from a pulse width modulator 99 is controlled.
  • a sensor 96 that the brightness of the diodes takes up, its signal leads to the Pulse width modulator too. Depending on the signal level of this sensor becomes the pulse width of the switching pulses in the way changed that its constant brightness ensures is.
  • the Inductor 91 connected in series with the LEDs. This limits the current rise when switched on of switching transistor 95.
  • the one stored in the coil Energy becomes available after the switching transistor is switched off fed to the diodes 90 via the freewheeling diode 93, whereby the current flow even during the switch-off breaks Transistor is held upright.
  • the same purpose also has the capacity parallel to the LEDs 98. To maintain a control range is here too the switching frequency is necessary Increase the machine cycle by at least a factor of 10.
  • Circuits have the further advantage that the supply voltage can fluctuate within wide limits without the Reproducibility of the measurement signals is impaired.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Document Processing Apparatus (AREA)

Claims (16)

  1. Dispositif pour contrôler des documents avec un organe optique (4, 5, 24, 25) pour éclairer le document dans au moins une zone spectrale, et avec un organe (13, 14, 15) pour recevoir la lumière réémise par le document et/ou transmise par le document, caractérisé en ce que l'organe pour éclairer se compose d'au moins un conducteur de lumière (3, 20, 21, 45, 46, 64, 65), muni d'une substance fluorescente par l'intermédiaire duquel au moins deux composantes lumineuses de longueurs d'onde différentes sont conduites sur une zone commune (62, 63) du document (1).
  2. Dispositif selon la revendication 1, caractérisé en ce que le conducteur de lumière (3, 20, 21, 45, 46, 64, 65) est constitué par un corps en matière synthétique présentant plusieurs faces planes ou incurvées (73, 74), et plusieurs faces étroites ou arêtes (7, 9, 22, 23, 47, 48, 59, 60, 61,55), et en ce que la première composante lumineuse est la lumière fluorescente qui résulte de la stimulation d'un rayonnement d'une source de lumière (4) dirigé sur au moins l'une des surfaces, et qui sort par une arête tournée vers le document (1).
  3. Dispositif selon la revendication 2, caractérisé en ce que la deuxième composante lumineuse sort d'une source de lumière (5), dont la lumière entre par l'une des arêtes, et sort par l'arête tournée vers le document (1).
  4. Dispositif selon la revendication 2, caractérisé en ce que la deuxième composante lumineuse est constituée par la lumière fluorescente d'un autre conducteur de lumière (3), qui est couplé optiquement au premier conducteur de lumière.
  5. Dispositif selon la revendication 1, caractérisé en ce que le guide de lumière est une plaque (3), en ce que la première source de lumière se compose d'une ou plusieurs lampes à substance luminescente (4), dont la lumière est introduite par une surface de la plaque (3), et en ce que la deuxième source de lumière se compose d'une ou plusieurs diodes électroluminescentes (5, 24, 25), dont la lumière est introduite par une face étroite (7, 22, 23) dans la plaque.
  6. Dispositif selon la revendication 1, caractérisé en ce que sont prévus deux conducteurs de lumière (64, 65) qui sont orientés l'un par rapport à l'autre en faisant un angle d'environ 45° par rapport à la normale au document (1) et qui est positionné par rapport au document, de telle façon que le document se trouve dans la zone de recouvrement (62) des lobes d'émission.
  7. Dispositif selon la revendication 1 ou 6, caractérisé en ce que l'arête de sortie du conducteur de lumière est munie de surfaces partielles (56, 66) optiquement réfléchissantes pour influencer la forme des lobes de sortie de lumière.
  8. Dispositif selon la revendication 1 ou 6, caractérisé en ce qu'entre l'arête de sortie du conducteur de lumière (3) et le document (1), est prévue une unité optique (71) qui représente l'arête de sortie du conducteur de lumière sur le document (1).
  9. Dispositif selon la revendication 1, caractérisé en ce que les sources de lumière (80, 90) sont reliées à des régulateurs de circuit (81 à 89, 91 à 99), qui régulent aussi bien les phases marche/arrêt qu'également la luminosité des sources lumineuses.
  10. Dispositif selon la revendication 1, caractérisé en ce que l'organe d'éclairage se compose de deux conducteurs de lumière (3) munis de substances fluorescentes, et en ce qu'est prévu un élément optique (71) par l'intermédiaire duquel la composante lumineuse du conducteur de lumière est déviée et focalisée sur une surface commune (63) du document (1).
  11. Procédé pour contrôler des documents (1) qui sont éclairés avec de la lumière de différentes zones spectrales, et pour recevoir la lumière réémise par le document et/ou transmise par le document (1), caractérisé en ce que les composantes lumineuses de différentes longueurs d'onde sont guidées chacune par un conducteur de lumière (3, 20, 21, 45, 46, 64, 65) muni de substance fluorescente sur une zone commune du document (1), les composantes lumineuses de différentes longueurs d'onde étant alternées par un procédé de multiplexage temporel.
  12. Procédé selon la revendication 11, caractérisé en ce que, pour créer la composante lumineuse d'une première longueur d'onde, on irradie la surface du conducteur de lumière avec la lumière d'excitation de la substance fluorescente.
  13. Procédé selon la revendication 12, caractérisé en ce que, pour créer la lumière d'excitation, on utilise des lampes à substance fluorescente, les lampes étant reliées à un régulateur de commutation (81 à 89, 91 à 99), qui crée des séquences d'impulsion de commande (Bursts), en synchronisme avec le processus de marche/arrêt de la lampe, et qui sont fonction de la luminosité de la lampe.
  14. Procédé selon la revendication 11, caractérisé en ce qu'on dirige la lumière d'une deuxième longueur d'onde selon la technique des conducteurs de lumière, par l'intermédiaire de conducteurs de lumière munis de la substance fluorescente (3, 20, 21, 45, 46, 64, 65) sur le document (1).
  15. Procédé selon la revendication 14, caractérisé en ce que, pour créer la lumière, on utilise des diodes luminescentes (5, 24, 25, 90) qui sont reliées à un régulateur de commutation (91 à 99) qui, en synchronisme avec le processus de marche/arrêt des diodes électroluminescentes, crée des signaux de commande modulés en largeur d'impulsion.
  16. Procédé selon la revendication 11, caractérisé en ce qu'au moins deux composantes lumineuses de longueurs d'onde différentes, sont guidées par au moins un conducteur de lumière (3, 20, 21, 45, 46, 64, 65) muni de substance fluorescente, sur la zone commune du document (1), les composantes lumineuses étant commutées par un procédé de multiplexage temporel.
EP91111438A 1990-07-11 1991-07-09 Méthode et dispositif pour l'examen de documents Expired - Lifetime EP0466119B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4022020 1990-07-11
DE4022020A DE4022020A1 (de) 1990-07-11 1990-07-11 Vorrichtung und verfahren zur pruefung von dokumenten

Publications (3)

Publication Number Publication Date
EP0466119A2 EP0466119A2 (fr) 1992-01-15
EP0466119A3 EP0466119A3 (en) 1997-04-16
EP0466119B1 true EP0466119B1 (fr) 1999-09-29

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EP91111438A Expired - Lifetime EP0466119B1 (fr) 1990-07-11 1991-07-09 Méthode et dispositif pour l'examen de documents

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Country Link
US (1) US5280333A (fr)
EP (1) EP0466119B1 (fr)
JP (1) JP3051207B2 (fr)
AT (1) ATE185212T1 (fr)
DE (2) DE4022020A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1587030A1 (fr) * 2003-01-23 2005-10-19 Aruze Corp. Capteur d'identification
CN104215613A (zh) * 2013-06-03 2014-12-17 日立欧姆龙金融系统有限公司 纸张类识别装置以及光学传感器装置

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US5272331A (en) * 1992-04-27 1993-12-21 Unisys Corporation Document imaging camera with lamp bent into symmetrical lamp segments
AT403967B (de) * 1992-11-18 1998-07-27 Oesterr Nationalbank Dokument und folienaufbau zur herstellung eines dokumentes
US5918960A (en) * 1994-01-04 1999-07-06 Mars Incorporated Detection of counterfeit objects, for instance counterfeit banknotes
AU1324895A (en) * 1994-01-04 1995-08-01 Mars, Incorporated Detection of counterfeits objects, for instance counterfeits banknotes
JP3307787B2 (ja) * 1994-02-15 2002-07-24 ローレルバンクマシン株式会社 紙幣処理機の紙幣判別装置
AT402861B (de) * 1994-03-28 1997-09-25 Oesterr Forsch Seibersdorf Verfahren und anordnung zum erkennen bzw. zur kontrolle von flächenstrukturen bzw. der oberflächenbeschaffenheit
US5719948A (en) * 1994-06-24 1998-02-17 Angstrom Technologies, Inc. Apparatus and methods for fluorescent imaging and optical character reading
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DE4022020A1 (de) 1992-01-16
EP0466119A2 (fr) 1992-01-15
JP3051207B2 (ja) 2000-06-12
EP0466119A3 (en) 1997-04-16
DE59109157D1 (de) 1999-11-04
JPH04288697A (ja) 1992-10-13
US5280333A (en) 1994-01-18
ATE185212T1 (de) 1999-10-15

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