EP1287496A1 - Appareil de verification de documents - Google Patents

Appareil de verification de documents

Info

Publication number
EP1287496A1
EP1287496A1 EP01940526A EP01940526A EP1287496A1 EP 1287496 A1 EP1287496 A1 EP 1287496A1 EP 01940526 A EP01940526 A EP 01940526A EP 01940526 A EP01940526 A EP 01940526A EP 1287496 A1 EP1287496 A1 EP 1287496A1
Authority
EP
European Patent Office
Prior art keywords
document
slide
checking device
evaluation
mirror
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
EP01940526A
Other languages
German (de)
English (en)
Other versions
EP1287496B1 (fr
Inventor
Robert Massen
Thomas Franz
Thomas Leitner
Jörg EBERHARDT
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei 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 Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP1287496A1 publication Critical patent/EP1287496A1/fr
Application granted granted Critical
Publication of EP1287496B1 publication Critical patent/EP1287496B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G07D7/121—Apparatus characterised by sensor details

Definitions

  • the invention relates to a document checking device according to the preamble of claim 1.
  • Document checking devices of this type have become known in multiple embodiments. They are used to automatically check the authenticity of documents, in particular passport cards, ID cards, driver's licenses, identity cards, residence certificates (visas) and the like. B. also drop tickets.
  • the invention therefore relates to the automatic checking (verification) of documents of any kind which are provided with certain authenticity features. It is known here to place the document to be checked on a transparent support surface, to illuminate the document from below with appropriate illumination sources and to record the reflected image with a camera. In a manner known per se, these are one or more matrix cameras which record the illuminated ID or document image and with one evaluate downstream software. However, the evaluation resolution of such a fixed unit is severely limited because, for example, known cameras have a resolution of 600 dpi and, because of the mirror deflection and the document size, only an evaluation accuracy of 100 dpi is possible with conventional identity cards or pass cards.
  • the known document evaluation devices have a relatively low resolution and therefore a relatively poor possibility of recognizing the authenticity features on the documents.
  • Such document checking devices are indeed suitable for reading text from the document - as is also known for flatbed scanners - but they are not suitable, e.g. B. read out a 2D barcode or not at all suitable to read out corresponding authenticity features which are based on diffraction structures or which relate to authenticity features hidden in image parts by steganography.
  • flatbed scanners are not suitable for recognizing special structures on a document, because it is necessary to illuminate such special structures with different illumination sources.
  • the invention is therefore based on the object of developing a document checking device of the type mentioned in such a way that an automatic examination of a document for authenticity features is possible quickly and accurately, with u. a. Authenticity features with diffraction structures should also be recognized reliably and correctly.
  • the invention is characterized by the technical teaching of claim 1.
  • the document checking device has a cross slide that can be moved in the X-Y direction, the components required for evaluating the authenticity features being arranged on this cross slide (hereinafter also referred to as X- ⁇ slide).
  • Authenticity features with the highest resolution and highest recognition accuracy can perform.
  • this XY positioning possibility of the evaluation unit it is consequently also possible to compensate for position errors of the authenticity features on the document. Namely, a document has been produced in such a way that the authenticity feature on the document z. B. is shifted by several millimeters, then this can be recognized due to the structure of the XY carriage, because the carriage is positioned so that the evaluation unit is positioned exactly under this authenticity feature.
  • the evaluation components are arranged on the X-Y slide, which are used to evaluate the diffraction structures and which are also used to evaluate other authenticity features, such as, for. B. a text, a barcode, a visible in the IR range or other authenticity features.
  • the evaluation unit for evaluating the diffraction structures consists of a laser and a corresponding evaluation optics, the entire evaluation unit being arranged on an inner slide which can be moved in the XY direction, this inner slide (also referred to below as an X slide). is arranged to be movable in an outer carriage which is movable in the Y direction.
  • Such evaluation optics include in particular an OCR camera with a lens, which can read out certain document structures both in white light and in IR light.
  • the entire evaluation unit consisting of a laser unit and the associated evaluation optics, can be moved in the X-Y direction and can thus be positioned very precisely under the authenticity features of the document to be examined.
  • the lighting unit is also arranged on the Y-slide. This is not absolutely necessary for a solution, because a lighting unit (or even several lighting units) could also be arranged in a stationary manner outside the X-Y slide, so that the document can also be illuminated through the support surface. However, it is preferred if this lighting unit is arranged on the Y-carriage and consists of at least one lighting line, so that during the movement of the Y-carriage along the document along the lighting line, a light line (scanning line) on the document over the entire width of the document is generated and this scanning line is directed to the OCR matrix camera via appropriate mirror optics and is evaluated by the latter.
  • a stationary evaluation unit for fluorescence features of the document is additionally arranged on the document checking device.
  • a stationary camera is mounted in the housing of the device, which looks at a mirror, which mirror in turn depicts the support surface - on which the document rests.
  • the contact surface is now illuminated in the UV range with a suitable UV illumination source, so that the security elements of the document which are excited to fluoresce emit light and this is directed via the mirror onto the stationary matrix camera.
  • This evaluation unit is completely independent of the X-Y carriage, and separate protection - regardless of the other features of the invention - is claimed for this evaluation unit and its fixed arrangement and for the design of the details.
  • this evaluation unit it can be provided that the stationary UV camera is omitted and that instead the camera used for laser evaluation on the X-slide is used at the same time to also evaluate the UV image.
  • two separate cameras could also be mounted on the X-slide, one of which is suitable for laser evaluation of the diffraction structures, while the other camera is intended for evaluating the UV image.
  • the invention is not limited to the previously mentioned evaluation in the UV range; this depends in particular on the type of filter used and the type of lighting source used.
  • all evaluations can also take place in a different spectral range, in particular polarization filters can also be used instead of the UV filters, or completely different wavelength ranges can be used.
  • the wavelength range of the NIR can be used (near infrared range) or any other wavelength range.
  • the following description speaks of a UV evaluation, this is only to be understood as an exemplary embodiment. All in all, it can be stated that the solution shown here of using an XY slide with a laser evaluation unit mounted in the X slide has the essential advantage that this laser unit is outstandingly protected against misalignment.
  • the entire X-Y slide can be very easily secured (locked), which means that the guides in which the X-Y slide is guided are protected accordingly and are secured against knocking out.
  • the invention also relates to the kinematic reversal of an XY slide. It has been explained above that the slide which can be moved in the X direction is the inner slide and the slide which is movable in the Y direction is the outer slide which, seen in the longitudinal axis of the device, can be moved along the document. In kinematic reversal it can also be provided that the inner slide can be moved in the Y direction and the outer slide in the X direction.
  • the aforementioned XY slide or the YX slide can also be replaced by other position systems that can be positioned on two levels. It is therefore provided that the entire evaluation components can be moved freely in two perpendicular directions in space. This can be done by spindle drives, by electromotive drives or by electromagnetic drives.
  • Such systems which can be freely positioned in the X-Y plane, are known. They consist of hydraulic or pneumatic cylinders, spindles driven by an electric motor or the like.
  • Figure 1 Schematic of a section through the document checking device according to the invention
  • FIG. 2 perspective side view of part of the laser evaluation unit
  • Figure 3 Section through the device showing further details
  • Figure 4 a separate representation of the X-carriage with its drive
  • Figure 5 is a side view of the Y-carriage
  • Figure 6 a plan view of the device of Figure 3 with the X-carriage in two different positions.
  • the housing 1 of a device is generally shown, which is approximately desk-like and has a front plate 2 inclined at an angle 4 to the horizontal, within which a transparent support surface 3 (z. B. made of glass) is arranged.
  • a transparent support surface 3 z. B. made of glass
  • the document to be examined is placed and pressed onto this contact surface 3 with a defined contact pressure, so that the document surface to be examined is visible from the underside of the contact surface 3.
  • an XY slide 7, 8 is now arranged in the housing 1 in slide guides to be described later, the Y slide 7 being movable in the Y arrow direction 5 and the X slide in the arrow direction 6 (namely perpendicular to the plane of the drawing in FIG. 1) ).
  • the less sensitive evaluation components are arranged on the outer Y-carriage 7, namely in particular a lighting unit 14 which is inclined in an oblique direction to the plane of the front plate and which is preceded by a cell-shaped focusing lens 15, so that this is also in front of the row trained lighting unit 14 is emitted light via the focusing lens 15 on the lying on the support surface 3, document underside.
  • the lighting unit 14 (see FIG. 6 in this regard) consists of LEDs arranged in rows, which in particular generate white light.
  • other lighting units can also be used, such as.
  • Legs Illumination unit which alternately provides LEDs, of which one part of the LEDs emits white light and the other an IR light.
  • a plurality of lighting units 14 can also be arranged side by side or also one above the other and each lighting unit can generate a separate spectrum or a mixed spectrum.
  • the light reflected by the illumination unit on the underside of the document is directed via the beam path 13 to a deflecting mirror 12 and is directed there by a lens 11 to a line camera 10 which is suitable for evaluating the text on the document accordingly or also image information or also hidden Information that can only be read out, for example, in the NIR area.
  • a signal processing board 9 is also firmly attached, with the aid of which the corresponding evaluations are carried out. This ensures that the information paths and the cable lengths are short and therefore the entire arrangement is less prone to failure.
  • the arrangement of an inclined beam path 16 at an angle to the support surface 3 has the advantage that with this lighting unit 14 and ultimately with the camera 10, initially roughly during the scanning of the document, the corresponding positions of the diffraction features to be detected later on with the laser evaluation unit are determined on the document can be.
  • the position of the diffraction features to be recognized later with the laser optics becomes rough determined and only later verified this diffraction feature with the laser evaluation components arranged on the X-slide.
  • these components consist of a laser 21 (see also FIG. 2), which generates a beam path 22 on a deflecting mirror 20, which in turn directs a beam path 23 onto the document surface to be examined.
  • the reflected image generated by the diffraction feature is reflected on the focusing screen 19 and forms a specific diffraction pattern 49 on the focusing screen 19, which is viewed through the focusing screen 19 from below at a certain solid angle 24 of a QCR matrix camera 17 through an objective 18 becomes.
  • the diffraction pattern 49 striking the focusing screen is focused in the objective 18 and directed onto the OCR matrix camera 17 and evaluated there.
  • the UV evaluation unit which is used in particular for evaluating fluorescent authenticity features on the document surface, will now be described.
  • the entire arrangement is especially designed for viewing in UV light.
  • a UV flash 26 is provided for this purpose, which is provided with a filter plate 27, which directs a light with a high UV component onto the document surface in the direction of arrow 30 and thereby excites the document surface with characteristic fluorescent threads.
  • the light reflected by the document 3 is directed between the limiting beam paths 32, 33 onto the mirror 25 and from there via the lens 28 with the image 31 into the camera 29 and recorded by a CCD chip arranged there.
  • a UV filter which blocks the UV light, can be arranged in front of the lens 28, so that only a light outside the UV range is detected by the camera. As a result, the camera 29 cannot be “blinded” by the UV flash 26.
  • each of the guide rails 35 there are two ball bushings 48 arranged one behind the other (see FIG. 6), with which the Y-slide 7 is firmly connected.
  • the entire Y slide can thus be moved and controlled freely in the arrow directions 5 in the Y direction.
  • the drive takes place via a stepper motor 34, which is firmly anchored to the housing 1 and which carries a toothed belt 37 via a drive shaft 36, which runs on a guide roller 40 on the opposite side.
  • a stepper motor 34 which is firmly anchored to the housing 1 and which carries a toothed belt 37 via a drive shaft 36, which runs on a guide roller 40 on the opposite side.
  • One strand of the toothed belt is connected to the Y slide 7.
  • Not invention limited to an overhead guide with overhead, parallel guide rails 35; others can
  • Guide rails 35 and instead of the four guide bushes 48 used, more or fewer guide bushes can also be used.
  • a housing 38 is arranged, in which the line camera 10 and the lens 11 are fixed, which ensures that these parts are easily interchangeable and can therefore be adjusted separately.
  • the camera 10 can be adjusted very precisely at the factory to the lens 11 arranged there, and later the entire housing 38 can be adjusted very precisely to the deflection mirror 12 arranged outside.
  • the X slide 8 is arranged to be movable in the Y slide perpendicular to the plane of the drawing in FIG. 3.
  • the X-slide 8 is driven to be displaceable on a left-hand guide designed as a pipe guide 41 so as to be displaceable to the plane of the drawing in FIG. 3, while the right-hand side of the guide is formed by a slide guide 50 on which the Y-slide only rests with a sliding block and Guide rail is firmly attached in the Y-slide.
  • two spaced-apart limit switches 42 are provided, which are also shown in FIGS. 4 and 5.
  • the X and Y axes each have two limit switches.
  • the drive motor 43 for the X slide is fastened in the Y slide 7 and drives the X slide 8 in the direction of the arrow 6 via its drive shaft 44 and a toothed belt 45.
  • this toothed belt 45 runs over a deflection roller 47 according to FIG. 5 in the Y slide 7.
  • the pipe guide 41 is otherwise attached to two spaced-apart bearing blocks 46 in the Y-slide according to FIG. 5.
  • FIG. 6 shows in plan view that the X-slide 8 can be moved into two different end positions, the end position of the X-slide being indicated at 8 '.

Landscapes

  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Image Input (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Eye Examination Apparatus (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

La présente invention concerne un appareil de vérification de documents permettant la vérification automatique de documents de valeur et de sécurité, ledit appareil présentant un coulisseau en croix pouvant se déplacer dans les directions X et Y, sur lequel sont disposés les éléments nécessaires à la détermination des caractéristiques d'authenticité. Selon l'invention, le coulisseau X du coulisseau en croix, se déplaçant dans la direction X, est disposé de manière à pouvoir se déplacer sur la longueur d'un coulisseau extérieur Y se déplaçant dans la direction Y, un premier groupe d'unités d'évaluation servant à déterminer, par laser et optique d'évaluation, les structures de diffraction se trouvant sur le coulisseau X, et un deuxième groupe d'éléments d'évaluation servant par exemple à reconnaître un texte, un champ IR et/ou un champ lumineux, se trouvant sur le coulisseau Y. L'appareil de l'invention peut également comprendre une source de rayonnement UV servant à vérifier des caractéristiques de fluorescence d'un document, ladite source pouvant être analysée par l'intermédiaire d'une unité d'évaluation fixe séparée ou de l'unité d'évaluation se trouvant sur le coulisseau X. L'appareil de vérification de documents de l'invention permet la réalisation rapide et précise d'une analyse automatique d'un document vis-à-vis de caractéristiques d'authenticité, les caractéristiques d'authenticité liées aux structures de diffraction, entre autres, pouvant être déterminées de manière fiable et précise.
EP01940526A 2000-06-07 2001-05-25 Appareil de verification de documents Expired - Lifetime EP1287496B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10028241A DE10028241A1 (de) 2000-06-07 2000-06-07 Dokumentenprüfgerät
DE10028241 2000-06-07
PCT/EP2001/005990 WO2001095261A1 (fr) 2000-06-07 2001-05-25 Appareil de verification de documents

Publications (2)

Publication Number Publication Date
EP1287496A1 true EP1287496A1 (fr) 2003-03-05
EP1287496B1 EP1287496B1 (fr) 2009-07-08

Family

ID=7645030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01940526A Expired - Lifetime EP1287496B1 (fr) 2000-06-07 2001-05-25 Appareil de verification de documents

Country Status (9)

Country Link
US (1) US6892946B2 (fr)
EP (1) EP1287496B1 (fr)
CN (1) CN1191554C (fr)
AT (1) ATE436061T1 (fr)
CA (1) CA2411689C (fr)
DE (2) DE10028241A1 (fr)
HU (1) HU227013B1 (fr)
PL (1) PL204284B1 (fr)
WO (1) WO2001095261A1 (fr)

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JP4473930B1 (ja) 2009-02-27 2010-06-02 パナソニック株式会社 帳票読取装置
DE102009017708B3 (de) * 2009-04-14 2010-11-04 Bundesdruckerei Gmbh Verifikationsvorrichtung und Verfahren zum Verifizieren beugender und/oder reflektierender Sicherheitsmerkmale von Sicherheitsdokumenten
CN101699844B (zh) * 2009-10-16 2014-12-03 威海华菱光电股份有限公司 全光谱识别图像传感器
CN101895663B (zh) * 2010-08-10 2014-12-03 威海华菱光电股份有限公司 接触式图像传感器
DE102012003241B4 (de) * 2012-02-20 2015-12-24 Bundesdruckerei Gmbh Vorrichtung und Verfahren zur automatischen Prüfung von Wert- und/oder Sicherheitsdokumenten
DE102013103527A1 (de) * 2013-04-09 2014-10-09 Bundesdruckerei Gmbh Bildaufnahmesystem zur Bildaufnahme von Merkmalen eines Identifikationsdokumentes
DE102013222273A1 (de) 2013-11-01 2015-05-07 Bundesdruckerei Gmbh Lesegerät
DE102014110946B4 (de) 2014-08-01 2016-03-10 Bundesdruckerei Gmbh Terminaleinheit zur Verifikation eines Sicherheitsdokuments
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Also Published As

Publication number Publication date
CA2411689C (fr) 2007-10-30
ATE436061T1 (de) 2009-07-15
EP1287496B1 (fr) 2009-07-08
HUP0300799A2 (en) 2003-08-28
CN1430770A (zh) 2003-07-16
PL204284B1 (pl) 2009-12-31
CN1191554C (zh) 2005-03-02
WO2001095261A1 (fr) 2001-12-13
CA2411689A1 (fr) 2002-12-06
US6892946B2 (en) 2005-05-17
DE10028241A1 (de) 2001-12-13
HU227013B1 (en) 2010-04-28
US20030156274A1 (en) 2003-08-21
PL359020A1 (en) 2004-08-23
DE50114972D1 (de) 2009-08-20

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