EP4014210A1 - Procédé et dispositif d'examen de documents de valeur - Google Patents

Procédé et dispositif d'examen de documents de valeur

Info

Publication number
EP4014210A1
EP4014210A1 EP20753873.7A EP20753873A EP4014210A1 EP 4014210 A1 EP4014210 A1 EP 4014210A1 EP 20753873 A EP20753873 A EP 20753873A EP 4014210 A1 EP4014210 A1 EP 4014210A1
Authority
EP
European Patent Office
Prior art keywords
value
document
radiation
excitation
value document
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20753873.7A
Other languages
German (de)
English (en)
Other versions
EP4014210B1 (fr
Inventor
Wolfgang Deckenbach
Thomas Giering
Thomas Happ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP4014210A1 publication Critical patent/EP4014210A1/fr
Application granted granted Critical
Publication of EP4014210B1 publication Critical patent/EP4014210B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D2207/00—Paper-money testing devices

Definitions

  • the invention relates to a method and a device for checking documents of value, in particular documents of value which contain at least one luminescent substance.
  • documents of value are understood to mean sheet-like objects that represent, for example, a monetary value or an authorization and therefore should not be able to be produced by unauthorized persons at will. They therefore have security features that are not easy to produce, in particular to be copied, whose presence is an indication of authenticity, i.e. production by an authorized body.
  • Important examples of such documents of value are coupons, vouchers, checks and, in particular, bank notes.
  • Luminescent substances are often used as security features. Luminescent substances are characterized in that they show luminescence when excited with suitable excitation radiation, that is to say that they can be excited with excitation radiation in an excitation wavelength specific for the respective luminescent substance and, as a result of the excitation, optical radiation with an respective luminescent substance characteristic spectrum, hereinafter also referred to as luminescent radiation.
  • the spectrum of the luminescence radiation has maxima at one or more wavelengths that differ from that of the excitation radiation.
  • the luminescence radiation is not emitted immediately, but rather over a certain time with decreasing intensity, which is referred to as decay behavior.
  • the decay behavior is also specific for the respective luminescent substance.
  • Luminescent substances often give off at a given intensity the excitation radiation emits luminescence radiation with a comparatively low intensity, which makes its measurement significantly more difficult.
  • luminescent substances can be introduced into a substrate of a respective value document of this value document type and / or applied to a surface of the substrate, for example printed on, as a security feature.
  • the authenticity of a document of value can then be verified by checking the luminescence behavior, for example the spectral distribution and / or the decay behavior and / or the spatial distribution of the luminescent substance in the document of value.
  • value documents of certain value document types can have as security feature a luminescent substance specified for the value document type, which is applied to only one side of the value document, hereinafter referred to as the front side of the value document.
  • the value documents can be transported past optical sensors at high speed in corresponding value document processing devices, by means of which luminescence properties can be checked in each case during the transport past.
  • a value document can be transported in one of four possible positions, depending on the feed, which result from the possible rotations around the longitudinal and transverse axis of the value document. ments by 180 °. If, for example, the value document has a feature on a front side on the left, this can appear depending on the position, for example when viewing the surface of the value document from above, above or below and left or right.
  • Known sensors for luminescent substances usually work in a remission geometry, that is to say that an excitation radiation source for irradiating the value document with excitation radiation and a detector for detecting luminescence radiation are arranged on the same side of the transport path for the value document or value document. If documents of value can occur in different positions, then a check of security features applied on one side, in particular also printed luminescence features, requires two sensors which are arranged on opposite sides of the transport path and thus of the document of value. Both the provision of the sensors and the processing of the signals from the sensors require additional effort.
  • excitation radiation sources and detectors that are not only used for checking value documents.
  • elements with homogeneously distributed luminescent substances but are also suitable for checking documents of value in which luminescent substances are not uniformly distributed homogeneously and / or are only applied to one side of the value document.
  • the present invention is therefore based on the object of providing a method which allows simple checking of documents of value with luminescent features applied on one side and which requires components that can be used easily or flexibly.
  • a corresponding device for carrying out the method should also be provided.
  • a first method with the features of claim 1 and in particular a method for checking documents of value which have a front side and a rear side opposite the front side and which have a substrate and one on the substrate in at least one section the front side of the document of value predefined luminescent substance, which comprises the steps of: irradiating at least a section of a first page of the document of value with excitation radiation to stimulate luminescence of the luminescent substance, the first side being the back of the document of value; Detection of luminescent radiation that was excited by excitation of the luminescent substance on the front side of the value document by at least part of the excitation radiation after transmission through the substrate of the value document and at least partially after transmission through the value document or the substrate on the back of the value document Value document emerges by means of a detection device; and checking the value document as a function of at least one property of the detected luminescence radiation by means of a Evaluation device.
  • the luminescent radiation excited by the excitation of the luminescent substance on the front side of the document of value by at least part of the excitation radiation after transmission through the substrate of the document of value is at least partially emitted by the luminescent substance in the direction of the rear side, and then at least partially after transmission through the Value document to exit from the value document on the back of the value document.
  • the value document can rest opposite the excitation device.
  • the document of value is transported along a transport path and at least the steps of irradiating and detecting are carried out during the transport.
  • a second method with the features of claim 7 and in particular a method for checking documents of value which have a front side and a rear side opposite the front side and which have a substrate and a substrate on the substrate comprise predetermined luminescent substance applied to at least one section of the front side of the document of value, comprising the steps of: transporting the documents of value individually past an excitation device which is designed to emit excitation radiation to excite luminescence of the luminescent substance; meanwhile, irradiating at least a section of a first page of a respective document of value with excitation radiation by means of the excitation device, detecting at least part of luminescence radiation which emanates from the first page of the document of value and which, if the first page, is the front of the value document is, by excitation of the luminescent substance of the The document of value was generated and delivered by the document of value, or if the first page is the back of the document of value, it was excited by excitation of the luminescent substance of the document of value by at least
  • the luminescent radiation excited by excitation of the luminescent substance of the document of value by at least part of the excitation radiation after transmission through the substrate of the document of value is at least partially emitted by the luminescent substance in the direction of the rear side, and then after transmission through the at least the Substrate to emerge on the first side.
  • a device for checking documents of value which have a front side and a rear side opposite the front side and which have a substrate and one on the substrate in at least one section the front side of the document of value include predetermined luminescent substance applied in a detection area of the device, which includes an excitation device for irradiating a first page of a single one of the documents of value in the detection area from a first side of the detection area to excite the luminescent substance to emit luminescent radiation a detection device for detecting luminescence radiation excited by means of the excitation radiation and emanating from the first side of the value document in the detection area in the direction of the first side of the detection area, and an evaluation device for checking the value document as a function of at least one property of the detected luminescence radiation.
  • the excitation device, the detection device and the evaluation device are designed to carry out a method according to the invention, in particular according to one of claims 1 to 18. Such a device according to the invention is also referred to
  • the detection area of the device is understood to mean an area in which at least a section of a document of value must be located so that the excitation device is used to emit excitation radiation onto at least part of the section and luminescence radiation excited by the section by the irradiation by means of the detection device can be captured.
  • the excitation device and detection device are arranged on the same side of the transport path and thus the document of value therein. It is thus also possible to check the mentioned value documents with the same components if they have a position in which the front side is directly irradiated with the luminescent substance by the excitation device.
  • the excitation device can emit at least one radiation source, for example at least one light-emitting diode and / or a laser, and optionally a filter that is unsuitable for excitation, for emitting excitation radiation suitable for excitation of luminescence of the luminescent substance Wavelength components is essentially impermeable, as well as a collimating device which bundles the radiation from the radiation source, for example at least one lens.
  • the detection device can be designed depending on the property of the luminescence radiation that is used for testing. For example, it can comprise a spectrometric device for the spectrally resolved detection of luminescence radiation or a device for the separate detection of wavelength components of the luminescence radiation in at least two wavelength ranges. The detection device forms detection signals which represent the properties of the detected luminescence radiation and outputs these to the evaluation device.
  • the evaluation device serves to check the document of value as a function of at least one property of the luminescence radiation detected by the detection device and can be connected to this via a corresponding signal connection.
  • the evaluation device can preferably carry out the step of testing according to one of the methods according to the invention.
  • the evaluation device can have, for example, a processor and a memory connected to the processor, in which a program is stored, the checking of which is carried out when the processor is executed.
  • the device can be designed in such a way that it is designed to check the documents of value while these are transported individually along a transport path that leads through the detection area, and in particular so that the excitation device a respective one of the value documents in the transport path is illuminated from the first side of the detection area, and that the detection device detects luminescence radiation emanating from the respective value document in the detection area in the transport path in the direction of the first side.
  • This embodiment allows a machine and thus efficient checking of even large numbers of documents of value.
  • the excitation device and the detection device can be arranged on the same side of the detection area and / or the transport path.
  • These arrangements have the advantage that no active components of the device need to be arranged on opposite sides of the detection area or transport path in order to be able to check the documents of value in all possible positions. Since all active components of the test device are on the same side of the detection area, a compact design and flexible use of the excitation and detection device is made possible. In particular, wiring and synchronization of the excitation and detection device on both sides of the value document, which would otherwise be necessary, can be avoided. Overall, the invention thus enables a simplified and yet reliable check of luminescent security features applied on one side of documents of value.
  • the arrangement of the excitation and detection device also allows documents of value with luminescent substances homogeneously distributed in the substrate to be checked, so that the device can be used flexibly.
  • the present invention therefore also relates to a device for processing documents of value which have a front side and a rear side opposite the front side and which have a substrate and a predetermined luminescent substance applied to the substrate in at least one section of the front side of the document of value, with a feed device for documents of value to be processed, into which documents of value can be introduced and individually output therefrom, an output device in which processed documents of value can be stored, a Transport device for the individual transport of value documents from the feed device along a transport path to the output device, a control device for controlling the transport and / or output device, and a device according to the invention for checking value documents, the one front and one the front have opposite rear side and which comprise a substrate and a predetermined luminescent substance applied to the substrate in at least one section of the front side of the value document, the device for testing and the transport device so from are formed and arranged so that the transport path runs through the detection area of the device for testing, and wherein the control device is connected to the device for testing via a signal connection and is designed
  • the methods serve to check documents of value with a substrate and a luminescent substance applied to the substrate in at least one section of the front side of the document of value, that is, documents of value of a type of value document, whose documents of value have a substrate and one on the substrate in at least one section of the front side of the document of value have applied luminescent substance.
  • the value documents thus comprise a sheet-shaped substrate that is on one side its surface has a luminescent substance predetermined for the type of value document in at least one section. In the following, this side is referred to as the front side of the substrate, and the side opposite this side is referred to as the rear side.
  • the front or back of the value document denotes those sides of the value document to which the front or back of the substrate are closest.
  • the luminescent substance is to be understood as part of the document of value.
  • the luminescent substance can preferably be applied there on the surface of the substrate, for example by printing or other forms of attachment or application.
  • the luminescent substance can be present as a layer on the surface or be contained in a layer on the surface. The layer does not need to form the top layer of the value document and / or to be applied directly to the substrate.
  • the luminescent substance can comprise one or more components and is preferably specified by a value document type of the value document.
  • the value document type of a value document can be given at least by the currency and / or the nominal value and / or optionally the issue. Genuine documents of value of this type of document of value must then have the luminescent substance in at least one section of the front of the document of value.
  • the luminescent substance can emit luminescent radiation in the infrared and / or visual spectral range when excited by the excitation radiation.
  • the value document type can additionally also have other properties, for example a print on the front and / or back of the value document or the presence of a security thread or the like. It has been found that luminescence on the front side of the value document can be excited when it is illuminated from the rear side, and that at least part of the luminescence radiation that was excited on the front side, after propagating to the rear side and emerging from the Document of value detected on the back and can be used for checking.
  • the substrate of the value document is at least partially permeable to the excitation radiation at least in the area of the luminescent substance applied to the surface.
  • the transmittance of the substrate of the document of value for the excitation radiation is preferably at least 10%, preferably at least 15%, particularly preferably at least 25%.
  • directional transmission is not absolutely necessary for effective transport of the excitation radiation through the substrate of the value document; rather, the radiation transport can also take place diffusively and thus non-directionally by means of corresponding scatter contributions.
  • the specified transmission values relate to measurements that record the transmitted excitation radiation integrally over all exit angles. Luminescence radiation that was excited on the front side and propagates in the substrate towards the rear side can reach the rear side, exit there and then be detected.
  • the substrate is also at least partially permeable to the luminescent radiation.
  • the transmission for the luminescence radiation is preferably at least 10%, particularly preferably at least 15%, particularly preferably at least 25%.
  • the substrate is preferably at least partially transparent to optical radiation in at least one wavelength range in the infrared (IR) and / or visual (VIS) range.
  • the wavelength ranges include at least the wavelength of the excitation radiation and the spectrum of the luminescence radiation generated by means of the luminescent substance.
  • the substrate preferably comprises at least one polymer layer, in particular made of polypropylene.
  • the substrate can have at least one further layer under the luminescent substance, for example an ink-accepting layer or another layer. In the context of the present application, these layers are regarded as components of the substrate.
  • the value document can also have what is known as a hybrid substrate, which comprises at least one polymer layer and at least one paper layer connected to the polymer layer.
  • only one test device is preferably used to test the luminescence, in which the excitation device and detection device or, more precisely, their radiation exit or entry surfaces are arranged on the same side of the detection area.
  • the excitation device and the detection device or, more precisely, their radiation exit or entry surfaces are preferably arranged on the same side of the detection area.
  • a second device is not necessary.
  • the test device it is possible for the test device to have no further radiation source for emitting excitation radiation on the side of the detection area that faces away from the excitation device.
  • a distance between the transport plane in which the value document is transported and the detection device can preferably be greater than 4 mm, particularly preferably greater than 9 mm .
  • the distance between the document of value and the detection device is greater than 4 mm, particularly preferably greater than 9 mm.
  • the value document is checked as a function of at least one property of the detected luminescence radiation. At least one property of the detected luminescence radiation is used during testing.
  • a spectral property of the detected luminescence radiation or a time behavior of the luminescence radiation, for example a decay behavior, can preferably be tested as a property.
  • the intensity at a given wavelength or in a narrow wavelength range or the intensity at at least two different wavelengths or wavelength ranges can be used as the spectral property.
  • a spatial distribution of the luminescence and thus the Luminescent substance can be used.
  • a combination of at least two of the properties mentioned is particularly preferably used.
  • the property can be given solely by a property of the detection signal of the detection device, for example its level, or determined by further evaluation of the detection signal in the evaluation device.
  • the evaluation device of the device can then preferably be designed to check during the check whether the detected luminescent radiation represents an indication of the presence of the luminescent substance on the front of the document of value.
  • the evaluation device of the device can preferably generate or emit a notification signal which represents whether or not the test produced the notification. This information signal can then be used further in a value document processing device, for example for sorting.
  • the checking is carried out in such a way that the result of the checking is independent of whether the first page of the value document is the front side of the value document or the back.
  • the evaluation device can be designed such that the checking is carried out in such a way that the result of the checking is independent of whether the first Side of the value document is the front of the value document or the back. This allows a simple check with very simple means; in particular, prior sorting in relation to the position is not necessary for checking value documents.
  • a strength of the detected luminescence radiation can preferably be compared with a reference value which is independent of whether the front side is the first side or not. If the strength of the detected luminescent radiation exceeds the reference value, this is considered an indication of the presence of the luminescent substance.
  • the reference value can be specified in such a way that one or more reference value documents, for example genuine reference value documents, of the same value document type are examined with the test device or an identically designed test device, possibly except for the evaluation device have the documents of value to be examined.
  • the reference value document or documents therefore also have a front side and a back side opposite the front side. They further comprise the substrate and the predetermined luminescent substance applied to the substrate in at least one section of the front side of the value document. For this or these reference value documents, the property of the luminescence radiation is then determined, which is emitted by the luminescent substance when the back of the value document is irradiated with excitation radiation and emanates from the back.
  • a corresponding detection is also carried out for the reference document or documents, in which, however, the front side is directly irradiated with excitation radiation.
  • the property is the strength of the luminescent radiation
  • the reference value can be set so that it lies below the strength of the luminescence radiation that was recorded for the reference value documents when the back was irradiated.
  • the evaluation device can be designed to use at least two test criteria during testing, a first of which is a criterion for the fact that the first page is the front of the document of value and the second test criterion is a criterion this is because the first page is the back of the value document.
  • This procedure has the advantage that different and therefore more precise criteria can be used for the presence of the luminescent substance on the first side or the second side, so that the test becomes more precise.
  • the test criteria can use different reference values with which the property of the detected luminescence radiation, for example its strength, is compared.
  • the luminescent substance is directly irradiated with excitation radiation, stronger luminescence radiation can result, for example, than in the case of irradiation after passage through the substrate and subsequent passage of the excited luminescence radiation through the substrate, generally weakening occurs through the substrate.
  • the evaluation device is preferably designed in such a way that it is also determined during the test whether the first side is the front side or the rear side.
  • a signal can then be formed and emitted, which shows whether the first page is the front or the back of the document of value.
  • the device can preferably have an interface via which the mentioned signal can be output. This interface can also be used to transmit other signals.
  • a further preferred embodiment of the method further comprises detecting a position of the document of value, the position showing whether the first page of the document of value is the front or the back.
  • the checking can then preferably be carried out as a function of the detected position of the value document.
  • the detection of the situation need only consist in the corresponding information provided by another device being detected.
  • the value document processing device can then have a position determining device, by means of which a position of the value document can be determined, the position reflecting whether the first page of the value document is the front or the back and which sends a position signal to the checking device , more precisely outputs their evaluation device, which reproduces the position of the value document.
  • the position determining device can, for example, have an image sensor operating in the visible wavelength range, by means of which a remission or transmission image of at least one section of the value document can be recorded.
  • the evaluation device can then preferably have an interface by means of which it can receive at least one signal that reproduces the position of the value document, the position indicating whether the first page of the value document is the front or the back, and further be designed to carry out the checking as a function of the position of the value document.
  • This embodiment allows a very precise test, since the properties of the detected luminescence radiation to be expected depend on the position of the value document and the test can be carried out differently for the possible positions.
  • the first method further comprises reflecting a part of the excitation radiation, which emerged after transmission through the value document on the front side of the value document, at least partially back onto the value document, and exciting the luminescent substance to emit luminescent radiation through the reflected part.
  • at least part of the luminescence radiation excited by the reflected part of the excitation radiation after transmission to the back of the document of value and exit from the document of value can then also be acquired during acquisition.
  • the second method comprises reflecting a part of the excitation radiation which, after transmission through the document of value, on a second, the first opposite has emerged over the lying side of the document of value, at least partially back onto the document of value and stimulating the luminescent substance to emit luminescent radiation through the reflected part.
  • the second method at least part of the luminescence radiation excited by the reflected part of the excitation radiation, which emanates from the first page of the document of value, can then also be acquired during acquisition.
  • the luminescence radiation is excited on the front side; part of it is emitted into the value document and passes through the substrate to the first side, that is to say the rear side, where it exits at least partially from the value document and thus starts from the first side.
  • the second page of the document of value is the back of the document of value, the reflected part of the excitation radiation at least partially penetrates the substrate and excites luminescence radiation on the front side of the document of value, the first page. Part of this luminescence radiation is emitted into the half-space in front of the front side, that is to say also emanates from the first page of the document of value.
  • inventions of the first and second method have the advantage that excitation radiation which has passed through the value document without having excited luminescence is at least partially deflected back onto the value document and can generate additional luminescence radiation which, together with the luminescence radiation that was excited by non-reflected excitation radiation can be detected. In this way, with excitation radiation of the same strength, significantly more or stronger luminescence radiation is recorded, which increases the accuracy of the test.
  • the luminescence radiation excited by the reflected portion of the excitation radiation is not absorbed by the Part of the luminescence radiation that was generated by the non-reflected portion of the excitation radiation, separated so that the detected luminescence radiation includes both the luminescence radiation generated by the non-reflected excitation radiation and the luminescence radiation generated by the reflected excitation radiation. This or at least one property thereof is used for testing.
  • the excitation radiation is preferably reflected with a degree of reflection of more than 50%, particularly preferably of more than 90%.
  • the first method it is preferred in the first method that there is at least partial reflection of luminescent radiation that was generated by excitation of the luminescent substance on the front side of the value document by means of the excitation radiation and is emitted on the front side of the value document includes back on the value document.
  • the reflected luminescence radiation is then preferably also detected during detection, at least partially after transmission to the back of the value document and exit from the value document.
  • the second method it is preferred in the second method that there is a reflection of luminescence radiation which was generated by excitation of the luminescence substance on the front side of the value document by means of the excitation radiation and of a second side of the value document opposite the first goes out, at least partially includes back to the value document. Furthermore, in the second method, when recording The reflected luminescence radiation is also detected at least in part after transmission to the first page of the value document and exit from the value document on the first page. In these embodiments or further developments of the first or second method, too, the reflected luminescence radiation cannot be separated from the non-reflected luminescence radiation during detection. The detected luminescence radiation therefore includes both the non-reflected luminescence radiation and the reflected luminescence radiation. This or at least one property thereof is used for testing.
  • the luminescence radiation is preferably reflected back with a degree of reflection of more than 50%, particularly preferably more than 90%.
  • the device can furthermore have a reflection device which emits excitation radiation from a second side of the document of value opposite the first side and / or from a second side opposite the first side Luminescence radiation emanating from the value document is reflected back into the detection area or onto the value document therein.
  • the device therefore has electrical elements only on the same side of the detection area, on the other side only the reflection device is present, which does not require any electrical control or signal connection.
  • the reflection device preferably has a degree of reflection of more than 90% for the excitation radiation or the luminescence radiation. Particularly strong luminescence radiation is obtained if both excitation and luminescence radiation are reflected in the method and in the device.
  • This embodiment has the further advantage that the reflection device only needs to be suitably designed here, for which purpose, particularly preferably, no additional components are necessary.
  • the reflection device is preferably set up to direct and / or diffuse the at least part of the excitation radiation emerging on the front side of the substrate and / or the at least part of the luminescent radiation emitted by the luminescent substance in the direction of the reflection device, in particular isotropic.
  • the at least part of the excitation radiation exiting on the front side of the substrate and / or the at least part of the luminescence radiation emitted by the luminescent substance is directed and / or diffusely, in particular isotropically, reflected .
  • the excitation radiation and / or the Lumi- nescence radiation which emerges in the area of the detection device on the front side of the substrate and / or the document of value and would thus be lost, is reflected back in the direction of the detection device.
  • the reflection device is preferably spaced from the detection area.
  • the distance between the reflection device and the detection area, particularly preferably the transport path is preferably between 1 and 20 mm, in particular between 3 and 12 mm, in particular approximately 10 mm. This avoids contact between the reflection device and the documents of value or the transport device, which could lead to mechanical damage to the documents of value, the transport device and / or the reflection device.
  • the excitation and / or luminescence radiation can preferably also be focused at least approximately on the transported documents of value when being reflected.
  • the reflection device can for this purpose preferably be designed in such a way that it focuses the reflected excitation and / or luminescence radiation into the detection area.
  • a focal plane or a focal point of the reflection device is preferably less than 2 mm above and less than 2 mm below a transport plane along which the value documents are transported.
  • Value document can excite more luminescence radiation or the less Luminescence radiation focused at least approximately in the value document can be better detected, in particular by means of the detection device.
  • the reflection device preferably has at least one cylindrical concave mirror and / or at least one reflectively coated convex, in particular plano-convex, cylinder lens which has a reflecting surface whose focal line is in a measuring plane of the detection device and / or in the vicinity the front side and / or on the front side of the document of value, in particular conveyed by the transport device.
  • the distance between the focal line and the measuring plane and / or the front side of the value document is preferably less than 20% of the focal length of the reflection device, in particular less than 2 mm.
  • the cylinder concave mirror is preferably positioned so that the cylinder axis lies approximately in the measuring plane of the test device.
  • the curved side of the cylinder lens is preferably coated with a reflective coating.
  • the scattered light and / or the luminescence radiation that arises in the vicinity of the focal line is roughly reflected back into the focal line by the mirror or the coated lens surface.
  • a particular advantage of using a planoconvex lens with a reflectively coated curved side compared to the cylindrical concave mirror is that there is a planar surface at the banknote transport plane which is robust against banknote abrasion and can be easily cleaned.
  • the reflection device has at least one Fresnel cylinder concave mirror and / or at least one reflectively coated Fresnel cylinder lens, which or which two or more has reflective surfaces which have different radii of curvature and whose focal lines lie in a measuring plane of the detection device and / or in the vicinity of the front and / or on the front of the document of value, in particular conveyed by the transport device Fresnel cylinder concave mirror with several cylinder surfaces with different radii, these are positioned so that a common focal line results, which lies in the measuring plane.
  • the distance between the focal line and the measuring plane and / or the front side of the value document is preferably less than 20% of the focal length of the reflection device, in particular less than 2 mm.
  • the scattered excitation light and / or the luminescence radiation that arises near the focal line is reflected back to the focal line by the individual mirrors in a significantly larger angular range than is the case with a single cylindrical concave mirror.
  • several cylinder lenses with different radii are combined in a Fresnel cylinder lens in such a way that a Fresnel cylinder lens is created, the curved sides of which are reflective coated and which has a single focal line that lies in the measuring plane.
  • a particular advantage of using a plano-convex Fresnel cylinder lens compared to a Fresnel cylinder concave mirror is that there is a plane surface facing the banknote transport plane which is robust against banknote abrasion and can be easily cleaned.
  • the Fresnel arrangement allows larger angular areas to be reflected back than with a simple cylinder lens.
  • the reflective surface or at least one of the reflective surfaces has two ends in the direction of the respective cylinder axis and the reflective surface or min- at least one of the reflective surfaces in the area of at least one of the two ends is concave, in particular spherical or aspherical, curved towards the cylinder axis and / or in the area of at least one of the two ends of the reflective surface or the at least one reflective surface a plane mirror, in particular perpendicular to the cylinder axis, is provided.
  • the concave ends of the reflective cylinder surface reduce edge drop of the cylinder reflection in the area of the ends so that the excitation radiation or luminescence radiation is efficiently reflected towards the value document or sensor, which results in a correspondingly higher intensity of the detected luminescence radiation Has.
  • Plane mirrors can "fold back" part of the scattered radiation that would be reflected by the concave mirror or mirrors into an area that is outside the detection area of the detection device and thus also reduce the edge drop and the Increase the intensity of the captured luminescence radiation Compared to concave ends, plane mirrors are simpler and cheaper to manufacture.
  • the reflection device can have at least one spherical concave mirror and / or at least one reflectively coated spherical convex lens, in particular planoconvex lens, which or which has a reflective surface whose focal point is in a measuring plane of the detection device and / or in the Near the front side and / or on the front side of the document of value, in particular conveyed by the transport device.
  • the distance between the focal point and the measuring plane and / or the front side of the value document is less than 20% of the focal length of the reflection device, in particular less than 2 mm.
  • the reflection device can have at least one spherical Fresnel concave mirror and / or at least one reflectively coated spherical Fresnel lens, which has two or more reflective surfaces that have different radii of curvature and which are positioned in this way are that a common focal point results, which lies in a measuring plane of the detection device and / or in the vicinity of the front and / or on the front of the document of value, in particular by the transport device, transported.
  • the distance between the focal point and the measurement plane and / or the front of the document of value is preferably less than 20% of the focal length of the reflection device, in particular less than 2 mm.
  • the scattered light and / or the luminescence radiation that arises in the vicinity of the focal point of a reflector is approximately reflected back by the reflector to the starting point.
  • a particular advantage of using a coated plano-convex lens compared to a concave mirror is that there is a flat surface facing the bank note transport plane which is robust against bank note abrasion and can be easily cleaned. Larger angular areas can be reflected back by means of a Fresnel arrangement.
  • this reflector in one embodiment, due to the scattering effect of the substrate of the value document, the reflection cannot produce an exact image at the starting point.
  • a substrate with a low scattering effect for example made of a polymer substrate
  • an approximately exact image may by all means be possible.
  • the aforementioned variants with spherical (Fresnel) reflectors are preferably used if the irradiation is not, at least approximately, linear illumination or irradiation of the document of value by the irradiation device, but rather individual tracks on the document of value with finite , in particular clear distances between them are irradiated.
  • the excitation radiation or luminescence radiation with a single spherical reflector per track towards the value document or in the direction of the one behind the value document located detector is reflected.
  • the reflection device has a plurality of spherical reflectors which are arranged offset from one another along a direction perpendicular to the transport direction of the document of value, each spherical reflector being provided with a spherical concave mirror, a reflectively coated spherical convex lens, a spherical concave Fresnel mirror or a reflective coated spherical Fresnel lens is formed.
  • the reflection device can have at least one retroreflector which is set up to reflect the incident excitation radiation and / or luminescence radiation largely independently of the direction of incidence and the orientation of the reflector, predominantly in the direction from which it came is or are. ie towards the value document or towards the luminescent security feature.
  • the retroreflector can preferably consist of a plurality of three flat mirrors arranged in pairs perpendicular to one another ("cat's eye") or, alternatively, a plurality of small, transparent spheres Include glass or polymer.
  • the large number of transparent spheres are additionally coated with a reflective metal on the rear side.
  • the transport device is preferably set up to convey the value document in a transport direction relative to the irradiation device, and the reflection device is offset against the transport direction with respect to the irradiation device, in particular an illumination optics of the irradiation device.
  • the reflective surface of the reflective device for example the cylinder and / or spherical and / or Fresnel mirror, is arranged offset a little against the direction of transport with respect to the lighting optics. This has the effect that the reflected excitation radiation is offset by twice the amount. The luminescences excited by this reflected radiation can contribute longer to the detection signal, since they have to be transported further until they have run out of the detection area of the detection device.
  • the reflection device such as, for example, the cylinder or spherical mirror, can also be tilted in its alignment to the perpendicular of the transport plane.
  • the invention enables a synchronization between the detection device and the excitation device that is simpler than the prior art with multiple detection and excitation devices, whereby the detection device and the excitation device, for example, do not excite or detect simultaneously.
  • FIG. 1 shows a schematic view of an exemplary embodiment for a value document processing device
  • 2 shows a schematic representation of an example of a checking device of the value document processing device in FIG. 1, in a side view transverse to a transport direction and in a sheet plane of a value document
  • FIGS. 3A to 3D schematic side views of a value document with a luminescent substance applied on one side in different positions relative to an excitation and a detection device of the test device in FIG. 2
  • FIG. 4 is a schematic flow diagram of a first example of a
  • 5 shows a schematic flow diagram of a further example of a method for checking a document of value with a luminescent substance applied only on one side.
  • FIG. 6 shows a schematic flow diagram of a step S1.6 1 in the method in FIG. 5,
  • FIG. 7 shows a schematic flow diagram of a fifth example of a method for checking a document of value with a luminescent substance applied only on one side
  • FIG. 8 shows a schematic representation of a further example of a checking device of the value document processing device in FIG. 1, in a side view transversely to a transport direction and in a
  • FIG. 9A and 9B are schematic representations of courses of different proportions of the excitation radiation and the luminescence radiation when using the test device in FIG. 5 in a value document with a luminescent substance applied on one side in two different positions relative to an excitation and a detection device of the test device in FIG. 5;
  • FIG. 10 shows an example of a reflection device of a test device in FIG. 8 in a side view;
  • FIG. 11 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 12 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 13 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 14 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 15 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 16 shows an example of a reflection device of a test device in FIG. 8 in a side view
  • FIG. 17 shows an example of a reflection device of a test device in FIG. 8 in a side view.
  • a value document processing device 10 in FIG. 1 in the example a device for processing value documents 12 in the form of banknotes, is designed for sorting value documents depending on the authenticity of processed value documents checked by means of value document processing device 10.
  • the feed device 14 has a feed device 14 for feeding documents of value, an output device 16 for receiving processed, ie sorted and a transport device 18 for transporting separated documents of value from the feed device 14 to the output device 16.
  • the feed device 14 comprises an input compartment 20 for a value document stack and a separator 22 for separating value documents from the value document stack Input compartment 20 and provision for or supply to the transport device 18.
  • Documents of value are fed to the transport device 18 in the same position as they were in the input compartment 20, that is, without changing their position, for example without turning or rotating.
  • the output device 16 comprises three output sections 24,
  • each of the sections comprises a stacking compartment and a stacking wheel, not shown, by means of which documents of value that are to be guided can be stored in the stacking compartment.
  • the transport device 18 has at least two, in the example three branches 28, 29 and 30, at the ends of which one of the output sections 24 or 25 or 26 is arranged, and at the branches via switches 32 and 34 which can be controlled by actuating signals Documents of value can be fed to branches 28 to 30 and thus to output sections 24 to 26 as a function of control signals.
  • the sensor device 38 On a transport path 36 defined by the transport device 18 between the feed device 14, in the example more precisely the separator 22, and a sensor device 38 is arranged in the first switch 32 in the transport direction T after the separator 22, which detects properties of the value documents while the value documents are being transported past and forms sensor signals which reproduce the properties and which represent the properties.
  • the sensor device 38 has an optical remission sensor 40 which detects a remission color image of the value document, an optical transmission sensor 42 which detects a transmission image of the value document, and a test device 44 for testing luminescence properties of value documents of a predetermined value document type.
  • a machine control and evaluation device 46 is connected to the sensor device 38 and the transport device 18, in particular the switches 32 and 34, via signal connections.
  • it classifies a value document as a function of the signals from the sensor device 38 for the value document into one of several predetermined sorting classes.
  • These sorting classes can be specified as a function of an authenticity value determined by means of the sensor data.
  • the sorting class can, for example, also be determined as a function of a status value determined by means of the sensor data for a respective value document.
  • the values “forged”, “suspected of being forged” or “genuine” can be used as authenticity values.
  • the machine control and evaluation device 46 controls the transport device 18, here more precisely the switches 32 and 34, by emitting actuating signals, so that the value document corresponding to its The sorting class determined during the classification is output in an output section of the output device 16 assigned to the class.
  • the assignment to one of the specified sorting classes or the classification takes place as a function of criteria specified for assessing the authenticity which depend on at least some of the sensor data.
  • the machine control and evaluation device 46 has a processor 48 and a memory 50 connected to the processor 48 in which at least one computer program with program code is stored When it is executed, the processor 48 controls the device, in particular evaluates the sensor signals of the sensor device 38, in particular to determine a sorting class of a processed document of value, and controls the transport device 18 in accordance with the evaluation.
  • the machine control and evaluation device 46 determines from the sensor signals of the sensor device 38 during a sensor signal evaluation at least one value document property which is relevant for checking the banknotes with regard to their authenticity. Several of these properties are preferably determined. In this example, a transmission image and a remission image are determined as optical value document properties and, by means of the test device 44, the presence of a predetermined luminescence property is determined as a further property.
  • the machine control and evaluation device 46 determines the various sensors as a function of the value document properties or the test device, respectively, sorting signals which represent whether or not the determined value document properties represent an indication of the authenticity of the value document. As a result of these signals, corresponding data can be stored in the machine control and evaluation device 46, for example the memory 50, for later use.
  • the machine control and evaluation device 46 determines an overall result for the test in accordance with a predetermined overall criterion and, depending on the result, forms the sorting or control signal for the transport device 18.
  • documents of value 12 inserted into input compartment 20 as a stack or individually are fed singly and singly to transport device 18 by separator 22, which transports the individual documents of value 12 past sensor device 38.
  • This records the properties of the value documents 12, with sensor signals being formed which reflect the properties of the respective value document.
  • the machine control and evaluation device 46 detects the sensor signals, determines a sorting class, in the example an authenticity class, of the respective value document as a function of these and, depending on the result, controls the switches in such a way that the value documents correspond to the determined Sorting class can be transported into an output section assigned to the respective sorting class.
  • value documents 12 of a value document type are checked in which the value documents 12 have a front side 72 and a rear side 75 opposite the front side (cf. FIG. 3) and a substrate 70 and a substrate 70 in at least one area.
  • section of the front side 72 of the document of value 12, specified luminescent substance 73 (cf. FIGS. 3A to 3D).
  • test device 44 In order to determine a sorting class on the basis of this property of a respective document of value, the test device 44 is used to examine a document of value, which is structured as follows in the example (cf. FIG. 2).
  • the checking device 44 has a detection area 60 in which a document of value must be located in order to be able to be checked with the checking device.
  • the transport path 36 leads through this.
  • the test device 44 has a sensor part 62 and an evaluation device 64.
  • the sensor part 62 comprises an excitation device 66 for irradiating a first page of a single one of the documents of value in the detection area 60 from a first side of the detection area with excitation radiation 67, which is used to excite the luminescent substance to emit luminescence radiation, and a detection device 68 for detecting Luminescence radiation 69 excited by the excitation radiation and emanating from the first side of the document of value 12 in the detection area 60 in the direction of the first side of the detection area 60.
  • the test device 44 is designed forms and arranged that the transport path 36 runs through the detection area 60.
  • a first page of the detection area or a first page of a value document or substrate is mentioned in the following, this refers to the side facing the excitation device 66 or the sensor part 62.
  • the sensor part 62 is therefore located on the first side of the detection area 60.
  • the excitation device 66 is designed to emit excitation radiation 67 in the infrared spectral range into the detection area 60.
  • the excitation radiation 67 comprises infrared excitation radiation which is suitable for the excitation of luminescence of the luminescent substance of the predefined value document or of value documents of the predefined value document type.
  • an exit surface via which the excitation device 66 emits the excitation radiation 67 into the detection area 60 is arranged on one side of the detection area 60, in this example the excitation device 66 is on one side of the detection area as a whole 60 arranged.
  • the excitation device 66 of the sensor part 62 generates a linear distribution of the excitation radiation 67 on the value document
  • the line here preferably runs transversely to the transport direction. In other exemplary embodiments, however, a different irradiation pattern can also be used.
  • the detection device 68 is arranged on the same side of the detection area 60 and thus the transport path 36 as the excitation device 66. In other exemplary embodiments, however, it may be sufficient that only one entry surface for luminescence radiation, which emanates from a document of value in the detection area 60, is arranged on the same side of the detection area 60 as the exit area of the excitation device.
  • the detection device 68 is designed in particular to detect luminescence radiation 69 emanating from a value document 12 in the detection area 60, which was generated by irradiating the value document 12 with excitation radiation 67 from the excitation device 66 and emanates from the value document 12. It then generates detection signals that represent properties of the luminescence radiation, in the example the strength of the luminescence radiation detected.
  • the detection device 68 preferably has a plurality of detection elements corresponding to the excitation device 66 and optionally an optical device which are designed and arranged so that the detection elements can each detect the excited luminescence radiation from a section of the detection area 60 assigned to the respective detection element and corresponding detection signals are formed.
  • the optical device has filters which suppress optical radiation from a wavelength range in which the luminescence radiation does not lie. These sections are arranged along a line transverse to the transport direction T.
  • the working distance between the sensor part 62 or the detection device 68 and the document of value 12 in the transport path 36 is preferably between 3 and 12 mm, in the example the distance is approximately 10 mm. In other exemplary embodiments, however, smaller or larger distances can also be provided.
  • the distance between the detection device 68 and the value document 12 in the transport path or the transport plane is preferably greater than 4 mm.
  • the checking device 44 further has the evaluation device 64 for checking the value document 12 as a function of at least one property of the detected luminescence radiation 69, which was detected by means of the detection device 68. In addition, in this exemplary embodiment it serves to control the excitation device 66 and the detection device 68.
  • the evaluation device 64 has a processor, a memory connected to the processor and at least one interface for exchanging data Signals and / or data with the excitation device 66, the acquisition device 68 and the machine control and evaluation device 46.
  • a processor a memory connected to the processor and at least one interface for exchanging data Signals and / or data with the excitation device 66, the acquisition device 68 and the machine control and evaluation device 46.
  • FIG. 3 only one interface for the excitation and acquisition device and one interface for the machine control and evaluation device are shown. In other exemplary embodiments, the interface for the excitation and detection device can also be replaced by two separate interfaces for the excitation and detection device.
  • a computer program is also stored in the memory of the evaluation device 64, and when it is executed by the processor, the evaluation device executes at least parts of a method described below for checking documents of value.
  • the excitation device 66, the acquisition device 68 and the evaluation device 64 are connected to one another via signal connections so that the evaluation device 64 acquires the detection signals of the acquisition device 68 and optionally controls the excitation device 66, and can evaluate the detected detection signals or use them to check the value document.
  • the checking device 44 is designed to check value documents of the specified value document type with regard to their luminescence.
  • a value document 12 of the specified value document type shown schematically and not true to scale in a sectional view perpendicular to the surface of the value document, has a substrate 70, in the present example a polymer substrate containing polypropylene with an ink acceptance layer thereon, and on a front side 72 of the substrate 70 applied to a section of the surface of the substrate, in the example printed on, a luminescent substance 73 specified for the value document type.
  • the section with the luminescent substance forms a security feature or luminescent feature 74.
  • the luminescent substance or substances or luminescent substances used for the luminescent feature can be organic, organometallic and / or inorganic luminescent substances.
  • Luminescence features in which both the excitation and the emission lie in the IR range are particularly suitable, since particularly low scattering losses in the substrate and thus particularly high intensities are to be expected in the rear measurement through the substrate.
  • the detection of luminescence radiation can become technically more complex (e.g. due to more complex or expensive rer detectors, increased background noise), and substrate-specific absorptions that favor or disadvantage certain wavelength ranges, especially in cellulose-based substrates.
  • the luminescence radiation of the luminescence feature is therefore in the range between 750 nm and
  • luminescent substances are doped inorganic pigments with the doping substances neodymium or ytterbium or erbium or
  • organometallic complexes with neodymium or ytterbium or erbium or thulium or holmium or certain organic dyes are also preferred.
  • Suitable inorganic matrices are, for example:
  • Oxides in particular 3- and 4-valent oxides such as titanium oxide, aluminum oxide, iron oxide, boron oxide, yttrium oxide, cerium oxide, zirconium oxide, bismuth oxide, and more complex oxides such as garnets, including yttrium iron garnets, Yttrium aluminum garnets, gadolinium gallium garnets; Perovskites, including among others yttrium-aluminum-perovskite, lanthanum-gallium-perovskite; Spinels, including below other zinc-aluminum spinels, magnesium-aluminum spinels, manganese-iron spinels; or mixed oxides such as ITO (indium tin oxide);
  • Oxyhalides and oxychalcogenides in particular oxy chlorides such as yttrium oxychloride, lanthanum oxychloride; and oxysulfides such as yttrium oxysulfide, gadolinium oxysulfide;
  • chalcogenides e.g. zinc sulphide, cadmium sulphide, zinc selenide, cadmium selenide;
  • Phosphates in particular barium phosphate, strontium phosphate, calcium phosphate, yttrium phosphate, lanthanum phosphate, and more complex phosphate-based compounds such as apatites, including calcium hydroxylapatites, calcium fluoroapatites, calcium chloroapatites; or spodiosites including, for example, calcium fluoro spodiosite, calcium chloro spodiosite; - Silicates and aluminosilicates, especially zeolites such as Zeolite A,
  • Zeolite Y Zeolite Y; zeolite-related compounds such as sodalites; Feldspars such as alkali feldspars, plagioclase;
  • inorganic compound classes such as vanadates, germanates, arsenates, niobates, tantalates.
  • such a value document of the specified value document type can be present in four different positions: with the front side 72 on a first side of the detection area 60 and therefore facing the excitation device 66 and the security feature 74 on the left (FIG. 3A) or right (FIG. 3B) or with the front side 72 on a second side opposite the first side of the detection area, or the rear side 75 on the first side of the detection area 60 and which therefore faces the excitation device 66 and the security feature 74 on the right (FIG. 3D) or on the left (FIG. 3C).
  • the security feature 74 can also be applied symmetrically. In this case, there are only two layers to be distinguished, which correspond to FIGS. 3A and 3B or FIGS. 3C and 3D.
  • the document of value 12 is transported in one of the last two layers or the last of the two layers in the transport path 36 in which the rear side 75 of the document of value faces the excitation device 66.
  • the stack of documents of value 12, which is fed to the separator 22 is fed to the separator 22
  • step S10 the transport device 18 transports the document of value 12 through the detection area 60 and past the excitation device 66.
  • the first side of the value document 12 facing the excitation device 66 is the back side 75 of the value document 12, that is, the value document is in a position in which the back side 75 of the value document of the first side of the detection area 60 or facing the excitation device 66 (cf. FIGS. 3C and 3D).
  • step S12 the excitation device 66 irradiates the first page of the value document in the transport path 36 in the detection area 60, ie the value document 12 from its rear side 75.
  • the document of value 12 When the document of value 12 is irradiated from the first side, that is to say the rear side 75 in the example, with excitation radiation 67 from the excitation device 66, part of the excitation radiation 67 enters the document of value 12, in particular its substrate 70. Since the substrate 70 is at least partially transparent to the excitation radiation 67, part of the excitation radiation reaches the front side 72 of the substrate 70 or document of value 12, where it excites the luminescent substance 73. The luminescent substance then emits luminescent radiation with its characteristic properties, part of which passes through the substrate 70, which is at least partially permeable to the luminescent radiation, to the rear side 75 of the document of value 12 and exits it.
  • step S14 the detection device 68 detects the luminescence radiation 69 emanating from the value document, more precisely its rear side, forming detection signals which are fed to the evaluation device 64.
  • the evaluation device 64 checks the value document as a function of at least one property of the detected luminescence radiation 69. From the detection signals of the detection device 68, it determines the strength of the luminescence radiation as a property and compares it with a predetermined reference value. In this execution For example, a mean value over the strengths or detection signals that are recorded for a respective value document is used as the strength. If the strength is above the reference value, the detected luminescent radiation represents an indication of the presence of the luminescent substance on the front side of the value document. The evaluation device 64 then emits an information signal that indicates the presence of the luminescent substance on the front side 72 of the value document and thus also represents the authenticity of the value document, to the machine control and evaluation device 46. Otherwise it emits a warning signal that represents a lack of the luminescent substance on the front side 72 and thus an indication of a forgery.
  • a predetermined reference value For example, a mean value over the strengths or detection signals that are recorded for a respective value document is used as the strength. If the
  • the machine control and evaluation device 46 determines a sorting class as a function of the notification signal and the sensor data of the other sensors.
  • the reference value used in step S16 can be determined, for example, by examining one or more reference value documents of the specified value document type, in that steps S10, S12 and S14 are carried out for each of the reference value documents.
  • the reference value documents are in a position in which the rear side faces the first side of the detection area or the excitation device.
  • a second exemplary embodiment differs from the first exemplary embodiment in that the value documents of the specified value document type are checked in any position, that is to say the front side with the luminescent substance or the rear side can face the first side.
  • Corresponding test device 44 more precisely its evaluation device 64, and the machine control and evaluation device 46 do not differ in their design from those of the first exemplary embodiment, only the documents of value can be present in the input compartment 20 in at least two layers, in which for some documents of value the Face up and others face down.
  • step S10 the transport device transports the value document through the detection area and past the excitation device.
  • the value document is in a position in which either the front side of the value document or the back side of the value document faces the first side of the detection area or the excitation device.
  • step S10 does not differ from step S10 of the first exemplary embodiment.
  • the value document is irradiated with excitation radiation 67 in step S12, the following happens: If the first side, i.e. the side of the value document directly irradiated by the excitation device 66, the rear side 75 of the value document 12 (cf. FIGS. 3C and 3D), occurs at least part of the excitation radiation 67 into the value document 12, traverses the substrate 70 and then excites the luminescent substance 73 on the front side 72 of the substrate 70 or on the front side of the value document 12 to luminescence.
  • the luminescent substance 73 emits luminescent radiation, part of which passes through the substrate 70 to the rear side 75 of the document of value, that is to say its first page, and emerges from the document of value 12.
  • the excitation radiation 67 hits the luminescent substance 73 directly on the front side 72 of the substrate 70 and excites it Luminescence on. Part of the luminescence radiation 69 excited in this way is emitted directly into the detection area 60.
  • Step S14 is unchanged: the luminescence radiation emanating from the value document in this way is detected by means of the detection device 68.
  • the evaluation device 64 checks the document of value as a function of at least one property of the luminescent radiation detected. As in the first exemplary embodiment, it determines the strength of the luminescence radiation as a property of the luminescent radiation from the detection signals of the detection device 68 and compares this with a predetermined reference value. If the strength is above the reference value, the detected luminescence radiation represents an indication of the presence of the luminescent substance on the front side of the value document, regardless of which position the value document has assumed. The evaluation device 64 then outputs a signal which represents the found indication of the presence of the luminescent substance on the front of the document of value and thus also of the authenticity of the document of value to the machine control and evaluation device 46.
  • the reference value used in step S16 of the first exemplary embodiment is used as the reference value, since in the event that the luminescence is excited from the back of the document of value, the excitation radiation is somewhat weakened when it passes through the substrate, and that of the weakened excitation radiation generated luminescence radiation is weakened somewhat when passing through the substrate to the rear side, the resulting luminescence radiation emanating from the value document is weaker than the luminescence radiation emanating from the value document when the front side is directly irradiated.
  • a third exemplary embodiment differs from the second exemplary embodiment in that step S16 1 has been changed compared to step S16, but steps S10, S12 and S14 are unchanged.
  • step S16 1 has been changed compared to step S16, but steps S10, S12 and S14 are unchanged.
  • the position of the document of value 12 is taken into account during the detection of the luminescence radiation. It is checked more precisely whether the detected luminescence radiation represents an indication of the presence of the luminescent substance on the front side 72 of the document of value 12.
  • the corresponding test device 44, more precisely its evaluation device 64, and the machine control and evaluation device 46 differ in their design from those of the second exemplary embodiment only in their programming or design for performing step S16 1 and the further use of the Results of Step S16 1 .
  • a first test criterion is now specified for positions in which the first side facing the excitation device 66 is the front side 75 and the luminescent substance 73 is illuminated directly by the excitation device 66 with excitation radiation 67 and for positions in which the rear side 75 is irradiated with excitation radiation 67 and the air minescent substance on the front side 72 is irradiated indirectly by the excitation radiation transmitted by the substrate 70.
  • the two test criteria are structurally the same, but use different parameter values. Simple threshold value criteria are used, which, however, have to be checked in the correct, specified order. It is checked whether the strength of the detected luminescence radiation is above a first or second reference value.
  • the first reference value is selected to be greater than the second reference value.
  • the first reference value can be obtained, for example, with the device used for checking, in that luminescence radiation intensities are recorded in the various positions for one or more specified reference value documents of the value document type, the detection conditions essentially corresponding to those during the test.
  • the first reference value can be selected, for example, between the mean value of the luminescence radiation intensities in the case of direct irradiation with excitation radiation and the mean value of the luminescence radiation intensities in the case of indirect irradiation.
  • the second reference value can be somewhat smaller than the mean value of the luminescence radiation intensities in the case of indirect irradiation.
  • the partial steps of step S16 1 are shown roughly schematically in FIG.
  • step S16 1 in a first sub-step S16'.1, it is checked as a first test criterion whether the strength of the detected luminescence radiation is above the first reference value. If this is the case, an indication of the presence of the luminescent substance on the front side of the value document is recognized, the front side being the first page of the value document. If this is not the case, the second test criterion is checked in sub-step S16'.2. It is checked more precisely whether the strength of the detected luminescence radiation is above the second reference value. If this is the case, an indication of the presence of the luminescent substance is recognized on the front side of the value document, but the front side is the second side of the value document that is not directly irradiated with excitation radiation.
  • sub-step S16'.3 two signals are then emitted, the first of which shows whether the luminescent substance is present on the front of the value document or not, and the second, whether or not the front is the first or if it is present the second side is.
  • the machine control and evaluation device 46 of the value document processing device 10 is designed to receive these signals and to compare the information about the position with information about the position of the value document, which can be obtained by means of another sensor, in the example of the reflectance sensor 40, which captures an image of the value document 12. This increases the security of the test.
  • a fourth exemplary embodiment differs from the second exemplary embodiment in that step S16 ′′ is changed compared to step S16 1 , but steps S10 to S14 are unchanged.
  • documents of value can be present in any position in the input pocket and then during transport When checking, the position of the document of value is taken into account during the detection of the luminescence radiation.
  • a first test criterion is now used for positions in which the front side is illuminated directly by the excitation device with excitation radiation and for positions in which the rear side is irradiated with excitation radiation and the luminescent substance on the front side is through the substrate
  • the two test criteria are structurally the same again, but use different parameter values. Both criteria check whether the strength of the detected luminescence radiation is within the first or second
  • the limits of the reference intervals can be obtained, analogously to the third exemplary embodiment, by examining one or more reference value documents in different positions. For example, a respective interval can be set as the interval in which a predetermined proportion of the detected luminescence radiation levels or also all luminescence radiation levels is or are located.
  • the reference intervals are chosen so that they do not overlap.
  • the sequence in which the test criteria are checked is irrelevant. It is checked in each case whether the strength of the detected luminescence radiation is within the respective reference interval. If this is the case, an indication of the presence of the luminescent substance is displayed the front side of the value document recognized, the position of the front side resulting from the test criterion that was met.
  • the test as to whether the strength of the recorded luminescence radiation is within specified intervals is significantly stricter than a test with threshold value criteria and therefore more precise. Two signals are then emitted, the first of which represents whether the luminescent substance is present on the front of the document of value or not, and the second, whether if the front is the first or the second page. Alternatively, only one signal has to be emitted which represents the three results found, for example through the amplitude of the signal.
  • the machine control and evaluation device 46 of the value document processing device 10 is designed to receive these signals and to compare the information about the position with information about the position of the value document, which is generated by means of another sensor, in the example of the reflectance sensor 40, an image of the value document recorded, can be obtained. This increases the security of the test.
  • a fifth exemplary embodiment in FIG. 7 differs from the third and fourth exemplary embodiment in that, prior to checking the value document on the basis of the detected properties of the luminescent radiation by means of another sensor, in the example of the remission sensor 40, a position of the the value document 12 transported past the sensor device 62 is determined. The testing of the luminescence property in the evaluation device 64 then also takes place as a function of the position information ascertained.
  • the test device 44 differs from the test device of the third or fourth exemplary embodiment only in that the evaluation device 64 is replaced by a modified evaluation device 64 ". The latter is designed to send the position signal to the machine control and evaluation device 46 and to carry out the steps to be carried out by the evaluation device in the following exemplary embodiment: All other components are unchanged, and the explanations relating to these also apply here accordingly.
  • step S10 is unchanged from step 10 of the third and fourth exemplary embodiments.
  • an image of the value document is recorded in step S 1 by means of a sensor, in the example of the reflectance sensor 40.
  • a position of the value document is determined from the image and a position signal representing the position is formed, which in the example is carried out by the machine control and evaluation device 46.
  • the position signal is transmitted to the test device 44, more precisely the evaluation device 64 or its interface to the machine control and evaluation device 46, which detects the position signal.
  • Steps S12 and S14 are unchanged from steps S12 and S14 of the third and fourth exemplary embodiments.
  • Step S16® differs from step S16 1 of the third exemplary embodiment or from step S16 ′′ of the fourth exemplary embodiment in that, depending on the position signal received, only that of the two test criteria is checked that is intended for the position that is determined by the Position signal is displayed.
  • This exemplary embodiment has the advantage that, on the one hand, the evaluation of the properties of the recorded luminescence radiation is less complex and, on the other hand, the recorded position information is also used for other purposes can be used in the value document processing device 10. In addition, a more precise check is achieved since it is impossible for an incorrectly dosed luminescent substance to only accidentally meet the check criterion that corresponds to the non-present position of the value document.
  • a spectrum of the detected luminescence radiation can also be used which includes intensities of the luminescence radiation in at least two narrow wavelength ranges .
  • the spatial distribution of the luminescent substance on the value document, which results from the spatial distribution of luminescent radiation can be used as the sole or additional property of the luminescent radiation as an alternative or in addition to the tests in the previously described embodiments.
  • the test device is then designed to detect the luminescence radiation excited by the excitation device 66 in a spatially resolved manner and to generate corresponding luminescence images of the document of value 12 or at least of the security feature 74, which are evaluated in the evaluation device to test the document of value 12.
  • a luminescence image is understood to mean the representation of a spatial dependence of the property of the excited luminescence radiation.
  • a dynamic property for example the rise and / or decay behavior of the luminescence, can additionally be used as a luminescence property during testing.
  • Still other exemplary embodiments can differ from the exemplary embodiments described in that the excitation device 66 is set up to emit excitation radiation 67 in the visible (VIS) spectral range and the detection device 68 is set up to detect radiation, in particular luminescence radiation 69, in the visible (VIS) spectral range is established. It is then possible to check documents of value with luminescent substances which can be excited to luminescence in the VIS.
  • the excitation device 66 is set up to emit excitation radiation 67 in the visible (VIS) spectral range and the detection device 68 is set up to detect radiation, in particular luminescence radiation 69, in the visible (VIS) spectral range is established. It is then possible to check documents of value with luminescent substances which can be excited to luminescence in the VIS.
  • the sensor part 62 has a spectral sensor in which the excitation device 66 emits excitation radiation pulses in predetermined, in particular different, wavelength ranges in a predetermined time sequence and which Detection device 68 for each of the pulses detected luminescence radiation that may have been excited in a spectrally resolved manner.
  • a spectral sensor is described in DE 102009058805 A1 by the applicant, the content of which is hereby incorporated into the description by reference.
  • the spectrum recorded can then be used as a property of the luminescence radiation the detected luminescence radiation, ie the strength of the luminescence radiation at predetermined wavelengths or in predetermined wavelength ranges can be used.
  • Still other exemplary embodiments can differ from the previously described exemplary embodiments in that the detection device 68 comprises a spectrometer.
  • DE 102006045624 A1 of the applicant describes a device in which the excitation device 66 and the detection device 68 are partially integrated. The content of DE 102006045624 A1 is hereby incorporated into the description by reference.
  • the acquired spectrum of the acquired luminescent radiation ie the strength of the luminescent radiation at predetermined wavelengths or in predetermined wavelength ranges, can also be used here as a property of the luminescent radiation.
  • FIG. 8 shows a further example of a checking device 80 for checking documents of value which have a front side 72 and a rear side 75 opposite the front side and which have a substrate 70 and a substrate 70, preferably on the substrate 70, in at least one section of the front side.
  • side of the document of value 12 include predetermined luminescent substance 73 applied, that is, documents of value as they were checked in the previous exemplary embodiments.
  • test apparatus is replaced by the tester 80 44, which only differs from the testing device 44, that now a reflecting means is provided 82nd All other components of the device with the exception of the value device 64, which is controlled by a Evaluation device 84 is replaced are unchanged, so that the same reference numerals are used for them and the explanations for these in the previous exemplary embodiments also apply here.
  • the reflection device 82 is designed and arranged in such a way that it reflects optical radiation coming from the detection area 60 into the detection area 60, so that if a value document 12 is present in the detection area 60, it strikes the value document 12 at least partially and at least partially enters into this.
  • the reflection device 82 reflects both the excitation radiation 67 T coming from the detection area 60 and luminescence radiation of the luminescent substance 73 generated by the excitation radiation, which is emitted into the detection area 60 but not the substrate 70.
  • the excitation radiation 67 reaches the luminescent substance 73 through the substrate 70, the latter is excited to luminescence by a portion 67.1.
  • the resulting luminescence radiation is emitted partly into the substrate (69.1) and partly into the detection area 60 (69.2).
  • the part 69.1 of the luminescence radiation released into the substrate penetrates little at least partially the substrate 70 and is released on the first side or on the rear side 75.
  • the portion 69.2 of the luminescence radiation emitted into the detection area 60 would be lost without the reflection device 82, but is reflected back onto the value document 12 in the example, passes through it at least partially to the first page, the back, and can then be removed from the value document are detected starting from the detection device.
  • a part 67.2 of the excitation radiation which has passed through the substrate but has not excited luminescence radiation exits the value document and passes through the detection area 60 to the reflection device 82.
  • the luminescent substance 73 is in turn excited to luminescence.
  • the luminescence radiation 69.3 excited by the reflected excitation radiation 67.2 is partially emitted into the substrate and, after transmission through the substrate 70, can be detected by the detection device 66 starting from the value document.
  • Another part 69.4 of the luminescence radiation excited by the reflected excitation radiation 67.3 is emitted into the detection area 60, arrives at the reflection device 82 and is reflected by this back onto the value document.
  • the reflected luminescence radiation 69.4 at least partially penetrates the value document. It then emanates from the value document on the back and can be detected by means of the detection device 66.
  • the detection device 66 detects four contributions of luminescence radiation in the first order: the non-reflected part 69.1 generated directly by the excitation radiation 67.1, the reflected part 69.2 generated directly by the excitation radiation 67.1, the reflected part 69.2 generated by the reflected excitation radiation 67.2 generated, non-reflected part 69.3 and the reflected part 69.4 generated by the reflected excitation radiation 67.2.
  • These parts cannot be separated, but are recorded together as luminescence radiation 69 generated by the excitation radiation.
  • only the luminescence corresponding to the portion 69.1 can be detected in a test device without a reflector according to Lig. 2.
  • the excitation radiation 67 reaches the front side 75 and thus the luminescent substance 73, this is excited to luminescence by a component 67.1.
  • the resulting luminescence radiation is emitted partly into the substrate (69.1) and partly into the detection area 60 (69.2).
  • the part 69.1 of the luminescence radiation emitted into the substrate penetrates at least partially the substrate 70, is reflected by the reflection device 82, passes through the value document 12 again and is emitted on the first side or on the front side 72.
  • the part 69.2 of the luminescence radiation emitted into the detection area 60 on the first side can be detected directly by the detection device 68 as part of the luminescence radiation emanating from the value document.
  • a part 67.2 of the excitation radiation which has not excited luminescence on the front side of the document of value passes through the substrate 70 and is reflected back onto the document of value by the reflection device 82.
  • This portion 67.3 crosses the substrate 70 and meets the luminescent substance 73 on the front side 75.
  • the luminescent substance 73 is in turn excited to luminescence.
  • the luminescence radiation 69.3 excited by the reflected excitation radiation 67.3 is partially emitted into the substrate and after transmission through the substrate 70, reflection at the reflection device 82 and renewed transmission through the value document as starting from the value document by means of the detection device 68 are recorded.
  • Another part 69.4, the luminescence radiation excited by the reflected excitation radiation 67.3 is emitted directly into the detection area 60 and can be detected by means of the detection device 68.
  • the detection device 68 thus records four contributions of luminescence radiation in the first order: the non-reflected part 69.2 generated directly by the excitation radiation 67.1, the reflected part 69.1 generated directly by the excitation radiation 67.1, the part 69.1 transmitted by the The reflected part 69.3 generated by the reflected excitation radiation 67.3 and the non-reflected part 69.4 generated by the reflected excitation radiation 67.3.
  • These parts cannot be separated, but are detected as luminescence radiation 69 generated by the excitation radiation.
  • a test device without a reflector as shown in FIG. 2 only the luminescence corresponding to the portion 69.2 can be detected.
  • step S13 of reflecting excitation and luminescence radiation emanating from the value document on the second side back onto the value document is carried out.
  • the distance between the transport path and the reflection device 82 is between 8 and 12 mm in the example, more precisely around 10 mm. In other exemplary embodiments, however, larger or smaller distances can also be provided.
  • the reflection device 82 preferably has a high reflectivity or a high reflectivity, in the example of more than 95%, for both excitation and luminescence radiation, in order to be able to utilize both of the above-mentioned mechanisms of action.
  • the reflection device 82 can either reflect in a directed or specular manner (ie actually reflect) or backscatter radiation diffusely or isotropically (ie white scattering surface). Suitable embodiments for the reflection device 82 include, for example, a metallic reflector, a dielectric layer stack, a white polymer film, a white ceramic and a white colored layer. However, other reflective or scattering materials are also conceivable. Depending on the configuration of the reflection device 82, for example as a white film or aluminum reflector, different increases in the detectable or detected luminescence intensity or luminescence radiation intensity can be achieved depending on the need or application.
  • the embodiments of the reflection device 82 shown below in FIGS. 10 to 17 are characterized in that the reflection device is designed in such a way that it focuses the reflected excitation and / or luminescence radiation into the detection area. sated.
  • a focal plane or a focal point of the reflection device lies less than 2 mm, preferably less than 1.5 mm above and less than 2 mm, preferably less than 1.5 mm, below a transport plane along which the documents of value rest the transport path 16 are transported.
  • the excitation and / or luminescence radiation is then focused at least approximately on the transported value documents when it is reflected.
  • the reflected excitation radiation can, by focusing at least approximately, excite more luminescence radiation in the detection area and thus the document of value therein, which can also be detected by the detection device.
  • the luminescence radiation focused at least approximately into the detection area and thus in the value document can also be detected better, since the detection device is designed such that it can detect luminescence radiation coming from the detection area. Without such a focusing, reflected components could possibly not be detected by the detection device, depending on the direction of propagation.
  • FIG. 10 shows a further embodiment of the reflection device 82 in a schematic side view.
  • the reflection device 82 has a cylindrical concave mirror 83, which is shown in the present case in cross section and is preferably positioned so that the radius of curvature of the cylinder surface is approximately in the center of the detection area 60 or the measuring plane of the sensor part 62 and / or in the plane of the Substrate 70 or value document 12 lies in the transport path.
  • the scattered excitation radiation and / or the luminescence radiation that arises in the vicinity of the focal line is roughly reflected back into the focal line by the cylindrical concave mirror 83, as illustrated by the rays provided with arrows.
  • a transparent protective pane made of glass, sapphire or the like can also be attached between the transport level of the documents of value and the reflection device.
  • the reflection device 82 has a reflective coated cylindrical lens 84, which is shown in the present case in cross section and whose convexly curved side 84 'is reflective coated.
  • the scattered excitation radiation and / or the luminescence radiation that arises in the vicinity of the focal line is roughly reflected back into the focal line.
  • the advantage of this embodiment is that there is a flat surface 84 ′′ to the bank note transport plane, which is robust against bank note abrasion, the risk of a transport jam is reduced and can be easily cleaned.
  • FIG. 12 shows yet another embodiment of the reflection device 82 in a schematic side view.
  • the reflection device 82 has, instead of a cylindrical hollow mirror 83, a Fresnel cylindrical hollow mirror 85 which has several cylindrical surfaces 85 ′, 85 ′′ with different radii, which are positioned so that a common focal line results, which is approximately in the center of the detection area 60 or in the measuring plane of the sensor part 62 or in the transport plane of the document of value 12.
  • the scattered excitation radiation and / or the luminescence radiation that arises in the vicinity of the focal line is reflected by the mirror surfaces 85 ' .85 "is reflected back into the focal line in a significantly larger angular range than with a simple cylindrical concave mirror.
  • a transparent protective pane made of glass, sapphire or the like can be attached between the transport level of the documents of value and the reflective device.
  • FIG. 13 shows yet another embodiment of the reflection device 82 in a schematic side view.
  • the reflection device 82 here has a Fresnel cylinder lens 86, the curved surfaces 86 ', 86 "of which are coated with reflective coating.
  • the advantage of this embodiment is in particular that a flat surface 86 '"is created at the bank note transport plane, which is robust against bank note abrasion and can be easily cleaned.
  • the Fresnel arrangement allows larger angular areas to be reflected back than with a simple cylinder lens .
  • FIG. 14 shows a special embodiment of edge regions of the reflection device 82 in FIG. 10 in a cross-sectional illustration perpendicular to the Transport direction.
  • the upper and lower end of the reflective surface (lateral surface) of the hollow cylinder mirror 83 each have a spherically or aspherically curved section 83a, through which the edge drop of the cylinder reflection is reduced and / or compensated by at least a portion of the excitation and / or euminescence radiation emanating from the document of value 12 in the direction of the ends of the hollow cylinder mirror 83 is again reflected towards the document of value 12, as is indicated by the two outer arrows.
  • FIG. 15 shows a second example of a particular embodiment of
  • the upper and lower end of the reflective surface (lateral surface) of a cylindrical hollow mirror 83 each have a plane mirror 83b.
  • the plane mirrors 83b reflect at least part of the light emanating from the edge areas of the document of value 12, which would be reflected by the hollow cylinder mirror 83 into an area which is outside the detection area 60 and / or the measuring area of the sensor part (not shown). lies, back in the measuring range - this light is, so to speak, "folded back", as is clear from the outer solid arrows compared to the dashed arrows - which reduces possible edge drop.
  • planar mirrors are in easier to manufacture and therefore more cost-effective
  • the design of the edge areas is also possible for reflection devices according to FIGS. 11, 12 and 13.
  • FIG. 16 shows a further example of an embodiment of a reflection device 82 with a plurality of spherical mirrors 87 for a plurality of tracks.
  • a reflection device 82 is used in particular if the illumination of the document of value to be checked is not (at least approximately) line illumination, but rather individual tracks with clear distances between them. In such applications, the excitation and / or luminescence light emanating from the document of value 12 is reflected efficiently towards the document of value with a single spherical mirror 87 per track.
  • this can be achieved by means of spherical concave mirrors or, similarly to the example shown in FIG. 11, by means of planoconvex lenses which are mirrored on the curved side.
  • Fresnel mirrors or lenses can also be used in order to increase the angular ranges.
  • FIG. 17 shows yet another embodiment of the reflection device 82 in a schematic side view.
  • This is a variant of the reflection device in FIG. 11.
  • the cylindrical mirror surface 84 'of the reflectively coated cylinder lens 84 is a finite distance d, preferably between 1 and 20 mm, opposite to the transport direction the illumination optics 87a of the excitation device 66 (not shown) offset.
  • This has the effect that the reflected excitation radiation is offset by twice the amount.
  • the luminescence radiation excited by this reflected excitation radiation can contribute longer to the detected or detectable luminescence radiation, since the value document 12 together with the security feature 74 located thereon must be transported further until the security feature 74 has run out of the detection area 60 of the detection device 68 .
  • this arrangement increases the selectivity with the offset, with which slow and fast decay time constants of the luminescence nescence can be distinguished.
  • the (cylinder) mirror 84 ′ can also be tilted in its alignment with the perpendicular L of the transport plane.
  • coated cylindrical lens 84 also apply accordingly to a reflection device 82 with a cylindrical hollow mirror 83 (cf. FIG. 10), Fresnel cylindrical concave mirror (cf. FIG. 12), coated Fresnel cylinder lens (cf. FIG. 13) or their spherical variants (cf.
  • the advantageous effects of the reflection device 82 described above in connection with FIGS. 10 to 16 can also be achieved if the reflection device 82 has a retroreflector or is designed as a retroreflector.
  • the devices and methods described are particularly suitable for testing luminescence features with IR excitation and IR emission, ie in the wavelength range from 750 to 2,500 ran, preferably from 800 to 2,100 ran.

Abstract

L'invention concerne un procédé d'examen de documents de valeur, qui présentent un côté avant et un côté arrière opposé au côté avant, et qui comprennent un substrat et une substance luminescente spécifiée appliquée sur le substrat dans au moins une section du côté avant du document de valeur, le procédé comprenant les étapes suivantes : l'irradiation, au moyen d'un dispositif d'excitation, d'un premier côté du document de valeur avec un rayonnement d'excitation pour exciter une luminescence de la substance luminescente, le premier côté étant le côté arrière du document de valeur ; la mesure d'un rayonnement luminescent, qui a été excité par excitation de la substance luminescente sur le côté avant du document de valeur par au moins une partie du rayonnement d'excitation après transmission à travers le substrat du document de valeur, et qui sort au moins partiellement du document de valeur sur le côté arrière du document de valeur après transmission à travers le document de valeur, au moyen d'un dispositif de détection ; et l'examen du document de valeur par rapport à au moins une propriété du rayonnement luminescent mesurée à l'aide d'un dispositif d'évaluation.
EP20753873.7A 2019-08-12 2020-08-07 Procédé et dispositif d'examen de documents de valeur Active EP4014210B1 (fr)

Applications Claiming Priority (2)

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DE102019005656.6A DE102019005656A1 (de) 2019-08-12 2019-08-12 Verfahren und Vorrichtung zum Prüfen von Wertdokumenten
PCT/EP2020/025364 WO2021028074A1 (fr) 2019-08-12 2020-08-07 Procédé et dispositif d'examen de documents de valeur

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GB8311795D0 (en) * 1983-04-29 1983-06-02 De La Rue Syst Detecting luminescent security features
DE10113268B4 (de) * 2001-03-16 2021-06-24 Bundesdruckerei Gmbh Sensor für die Echtheitserkennung von Sicherheitsmerkmalen auf Wert und/oder Sicherheitsdokumenten
DE10259293A1 (de) * 2002-12-18 2004-07-22 Giesecke & Devrient Gmbh Vorrichtung für die Überprüfung der Echtheit von Banknoten
DE102006045624A1 (de) * 2006-09-27 2008-04-03 Giesecke & Devrient Gmbh Vorrichtung und Verfahren zur optischen Untersuchung von Wertdokumenten
DE102009058805A1 (de) * 2009-12-18 2011-06-22 Giesecke & Devrient GmbH, 81677 Spektralsensor zur Prüfung von Wertdokumenten
JP6242570B2 (ja) * 2012-09-06 2017-12-06 株式会社東芝 画像読取装置、及び紙葉類処理装置
DE102014003005A1 (de) * 2014-02-28 2015-09-03 Giesecke & Devrient Gmbh Verfahren zum Ermitteln eines Sortierergebnisses für ein Wertdokument und Mittel zur Durchführung des Verfahrens
EP3503049B1 (fr) * 2017-12-22 2021-02-24 CI Tech Sensors AG Dispositif et procédé de détection d'une caractéristique de sécurité lisible par machine d'un document de valeur

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EP4014210B1 (fr) 2024-01-24

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