WO1994016412A1 - Detection of counterfeit objects - Google Patents
Detection of counterfeit objects Download PDFInfo
- Publication number
- WO1994016412A1 WO1994016412A1 PCT/GB1994/000006 GB9400006W WO9416412A1 WO 1994016412 A1 WO1994016412 A1 WO 1994016412A1 GB 9400006 W GB9400006 W GB 9400006W WO 9416412 A1 WO9416412 A1 WO 9416412A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- wavelength band
- counterfeit
- glass plate
- detector
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims description 11
- 239000011521 glass Substances 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 238000005286 illumination Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- G07D7/128—Viewing devices
-
- 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
Definitions
- This invention relates to the detection of counterfeit objects.
- it relates to the detection of counterfeit objects by detecting unauthorised material of which the object is made or on which it is printed or otherwise formed.
- counterfeit objects in particular, counterfeit ban notes is continually increasing on the back of continuing improvements in printing technology, particularly colour printing.
- Bleached paper includes chemical components which fluoresce when exposed to ultraviolet radiation, that is, the molecules in the composition of the paper are • excited and emit light at a longer wavelength which peaks in the band of from 400 to 500 nm. Because wavelengths of 300 to 400 nm generally lie outside the spectral region of the human eye and because wavelengths of from 400 to 500 nm lie within the spectral region, the phenomena of fluorescence allows some counterfeits to be detected with the human eye.
- This process can be automated with the use of electronics by providing a sensor and a comparator which compares the intensity of the fluorescent light sensed with a reference level so as to orovide an indication as to whether tr.e paper is a likely counterfeit or not.
- a sensor and a comparator which compares the intensity of the fluorescent light sensed with a reference level so as to orovide an indication as to whether tr.e paper is a likely counterfeit or not.
- apparatus for detecting counterfeit objects comprising means for illuminating the object with light within a first wavelength band, a detector for detecting light from said object having a first wavelength within said first wavelength band and a second wavelength within a second wavelength band different from said first wavelength band and said second wavelength band including wavelengths at which counterfeit objects may fluoresce when exposed to light in said first wavelength band, comparison means for comparing the output of the detector with at least one reference level and decision means for deciding, based on said comparison whether said object is counterfeit or not and providing an appropriate indication.
- Figure 1 is a plan view of a first embodiment of the apparatus
- Figure 2 is a section taken on line 2-2 of Figure 1;
- Figure 3 is a section taken on line 3-3 of Figure 1 ;
- FIG. 4 is a block diagram of the processor of the apparatus of Figure 1;
- Figure 5 is a block diagram of a second embodiment of a counterfeit detection apparatus
- Figure 6 shows a perspective view of a hand-held scanning unit housing the apparatus of Figure 5;
- Figure 7 is a side view of the hand-held unit
- Figure 8 shows a front view of the hand-held unit
- Figure 9 is a perspective view of another form of hand-held unit.
- Figure 10 is an under plan view of the unit of Figure 9. It has been discovered that genuine and counterfeit bank notes often have different reflectivities particularly when exposed to ultraviolet radiation in the band of from 300 to 400 nm. Thus by applying two tests to sense both the fluorescent light and the reflected light from a bank note exposed to ultraviolet radiation, a bank note can be declared genuine or counterfeit with great certainty.
- Figure 1 shows apparatus for irradiating a bank note with light and then measuring the amount of fluorescent light and reflected light.
- the apparatus includes a generally rectangular container 100 having a window 102 against which a bank note to be sensed can be placed.
- an elongate light source 104 for producing light in the 365 nm region and directing it through the window 102.
- two photo diodes 104 and 106 spaced apart from one another but angularly inclined so that their optical axes intersect generally at the outer surface of the window 102.
- Each photo-diode 104 and 106 is mounted on the floor of a respective tucular opaque housing 108 and 110.
- the inner walls of the housing are lined with reflective material to increase the sensitivity of the photo-diodes.
- a 365 nm band pass optical filter 112 covers the housing 108 and a 450 nm band pass optical filter covers the housing 110.
- the lamp 104 is surrounded on three sides by reflective material 116 for example aluminium foil which reflects light generally in the direction of the window 102 to concentrate the light at the window.
- reflective material 116 for example aluminium foil which reflects light generally in the direction of the window 102 to concentrate the light at the window.
- the reflective material is so positioned around the light source that the optical plane of the light directed at the window, makes the same angle with the window as do the optical axes of the photo detectors in a manner to ensure that the photo-detectors receive the maximum fluorescent and maximum reflected light from any bank note placed on the window 102.
- the window 102 is provided by a glass plate which reflects some of the light received from the source 104 back to the photo-diode 104.
- the light is principally reflected back from the glass-air boundary of the plate and typically is around S% of the light directed at the glass plate.
- the amount of reflected light at 365 nm is usually fairly small and so typically the amount of reflected light will increase from 8% to a value in the range of from 12 to 18%.
- the light reflected from the plate when no bank note is present can be used as a reference level to compare the degree of reflection with when a bank note is present.
- the amount of fluorescent light emitted by a counterfeit bank note is generally several orders higher than the amount of light emitted by a genuine bank note and so any degradation of the light source 104 makes little or no difference to the detection of fluorescent light.
- An electronic processor (not shown but which will be described in more detail hereinafter) monitors the light received by both photocells with the lamp 104 switched on. In the absence of a bank note on a window the photocell 104 will provide a steady state output. As soon as a bank note is placed on the window the output 104 from the photocell will rise and a trigger signal is then generated to activate two measurement circuits for measuring the outputs of the two photocells 104 and 106.
- the measurement circuits provide readings which can be displayed by a display device 126, and a decision circuit will, in response to the readings, activate one of two optical indicators 122 and 124 respectively indicating that the bank note is genuine or counterfeit.
- a printer (not shown) may be provided to record the values displayed by the display device 126. It will thus be seen that the apparatus is automatically activated by the placement of a bank note on the window to determine whether the bank note is genuine or counterfeit.
- Each photocell 104 and 106 feeds a respective trigger circuit 130 and 132 for detecting a rapid change in signal for example as a result of a bank note being placed on the window.
- Either or both trigger circuits 130 and 132 feed a signal to an actuator 134 which actuates two measurement circuits 136 and 138 (for example ey supplying power to them or deactivating inhibitors wnich inhibit their operation) .
- a delay circuit 140 deactuates the measurement circuits 136 and 138 after a short measurement period.
- a first comparator 142 compares the output of the photocell 104 with a reference value stored in a store 144 and if the detected value exceeds the reference value, an output is generated which is fed simultaneously to the gates 146 and 143.
- the signal stored in the store 144 is derived from the photocell 104 during the quiescent state of the apparatus.
- the output of the photocell 104 is amplified by an amplifier 150 by a factor of between 25% and 50% and stored in the store 144. As soon as the actuator 140 is triggered, the amplifier 150 is inhibited so that the store 144 only stores the quiescent value of reflected light.
- a comparator 152 compares the output of the measurement circuit 138 with a reference value 154 and when the reference value is exceeded generates an output signal which is fed to the two gates 146 and 148.
- the gate 146 responds when a genuine note is detected to energise the indicator 122.
- the gate 148 responds to energise the indicator 124 when a counterfeit note is detected.
- the actual values at the outputs of the two measured circuits 136 and 138 are fed to the display 126 for display thereby.
- the apparatus is advantageously shielded by a cover which provides a slot through which a bank note can be inserted onto the window.
- the light source can be modulated at a selected frequency and the outputs of the photo diodes demodulated at the same frequency to eliminate the effects of ambient lignt.
- rs (Ps/Pr)*r g /(l-r g ) 2
- Ps is the reflected portion of the irradiating signal from the specimen
- Pr is similarly that portion returned from the glass plate to be used as a reference
- r g is the coefficient of reflectance from the glass plate.
- UV reflection from a bank note varies with the degree of soiling. It may be possible to measure the degree of soiling and to compensate by adjusting the reference values stored accordingly.
- the apparatus shown in Figure 5 measures both fluorescent light and reflected light using a single monitor to determine whether a bank note is counterfeit or genuine.
- the apparatus comprises an ultraviolet (UV) lamp 2 which is preferably mounted in a hand-held scanning unit.
- the UV lamp 2 is arranged to emit radiation at a frequency which is known to cause bleached paper to fluoresce.
- a detector 3 is arranged to receive both fluorescent and reflected radiation from a bank note 1 but not directly from UV lamp 2 'without being reflected.
- the monitor may be a photo-diode or phototran ⁇ istor, for example, sensitive to the appropriate light frequency or frequencies.
- the monitor should be sensitive to fluorescent light in the 400-500 nm range and to reflected ultraviolet light in the 300-400 nm range so as to be sensitive to counterfeit notes of bleached paper which fluoresce or counterfeit notes which don't fluoresce but because they are counterfeit they often have a higher reflectance to ultraviolet light than genuine notes.
- An electrical signal is applied from monitor 3 to one input of a comparator 4.
- a second detector or monitor 5 is arranged to receive UV radiation directly from lamp 2.
- the signal from this is first amplified by an amplifier 6 and applied to a resistor 7 the other end of which is earthed.
- Resistor 7 forms part of a potentiometer, the slider connection of which itself is applied as a second input to comparator 4.
- the slider can be set to provide a threshold value representing a predetermined proportion of the voltage which is proportional to the UV intensity.
- the comparator 4 is arranged to output a signal if the signal received by the monitor 3 is greater than or equal to the set detection threshold. When the threshold is reached it means that a certain proportion of the light impinging upon note 1 has been reflected or re-emitted as fluorescence and therefore it is assumed that the note is counterfeit.
- the signal from the comparator 4 is applied through a low pass filter (for example an RC filter 8,9 as shown in Figure 5) to a timer 10. This timer produces a pulse of, for example, approximately one second which actuates a buzzer 11 and a visual alarm in the form of an LED 12. In the example shown buzzer 11 and LED 12 are - Q -
- the output pulse from timer 10 may also be applied to a line driver 13 which is adapted to provide a suitable signal for application to a management system.
- This management system may be used to provide a warning to a remote control position, such as a manager's or security office in a shop for example, that a counterfeit note has been identified.
- the line driver may, in one example, provide TTL signals.
- the apparatus is most preferably configured as a hand-held scanning unit and one, non-limiting example of a suitable housing in which the apparatus may be mounted is shown in Figures 6 to 8.
- the unit comprises a head 17 in which the UV lamp 2 is mounted to illuminate an object placed underneath the head.
- a handle 13 is preferably shaped with a series of ridges for example to facilitate a good hand grip.
- Power for the apparatus is provided through a mains lead 19 which can be from a mains supply, from an adjacent till or EPOS unit, or by other means. It may alternatively be possible for the apparatus to be powered by batteries, which may be rechargeable batteries, for true portability.
- a basic on/off switch 20 is provided which enables lamp 2 to be illuminated and therefore the detection apparatus to function only when the switch is depressed by a thumb for example when the unit is being held. If this configuration is adopted then the unit- is arranged to operate only in the scan position.
- the signal to a remote control or monitoring station such as a security office, may be transmitted by mains-born signalling. This may be achieved by applying pulses of known frequency onto the mains. If different frequencies are applied by different units then an operator at the remote position, when receiving a signal indicating a counterfeit note, will know which scanning unit has identified that note.
- the unit may be temporarily mounted in position, eg by a suitable bracket mounting, when in use and/or when 'dormant'.
- the portable and adaptable nature of the unit enables great versatility of use in different environments and situations and with different attachments thereto.
- the detection circuitry is effectively only operated when the ON/OFF switch is used to actuate the lamp, thereby minimising power consumption and reducing false readings from objects other than those desired to be tested.
- FIG. 9 An alternative hand-held scanning unit in the form of a wand is shown in Figures 9 and 10.
- the wand has a cylindrical housing 58 having a switch 60 on one side and an ultraviolet lamp 62 on the opposite side.
- a sensor 64 is located adjacent the lamp 62.
- the unit operates in a similar manner to tne unit of Figures 6 to 8.
- the counterfeit objects may oe other than bank notes and could be any object, the authenticity of 'which relies to some extent on the type of paper or other material it is formed from or printed on.
- the genuine article may glow under UV light, in which case the apparatus can be suitably modified, eg by reversing the input connections to comparator 4 so that a signal less than a threshold level actuates an alarm.
Abstract
Description
Claims
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP51579494A JP3489681B2 (en) | 1993-01-09 | 1994-01-04 | Counterfeit detection |
RU95117090A RU2139571C1 (en) | 1993-01-09 | 1994-01-04 | Detection of counterfeit entities |
EP94920841A EP0679279B1 (en) | 1993-01-09 | 1994-01-04 | Detection of counterfeit objects |
AU58200/94A AU5820094A (en) | 1993-01-09 | 1994-01-04 | Detection of counterfeit objects |
DE69418596T DE69418596T2 (en) | 1993-01-09 | 1994-01-04 | DETECTING FAKE OBJECTS |
US08/666,294 US5915518A (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeit objects, for instance counterfeit banknotes |
EP95904656A EP0738408B1 (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits objects, for instance counterfeits banknotes |
CA002179994A CA2179994A1 (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits objects, for instance counterfeits banknotes |
PCT/GB1995/000022 WO1995019019A2 (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits objects, for instance counterfeits banknotes |
ES95904656T ES2178664T3 (en) | 1994-01-04 | 1995-01-04 | DETECTION OF FALSIFIED OBJECTS, FOR EXAMPLE, FAKE BANK TICKETS. |
AU13248/95A AU1324895A (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits objects, for instance counterfeits banknotes |
DE69528153T DE69528153T2 (en) | 1994-01-04 | 1995-01-04 | TESTING COUNTERFEIT, FOR EXAMPLE OF COUNTERFEIT BILLS |
CN95191765A CN1073251C (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits object, e.g. conterfeits banknotes |
JP51837395A JP3678748B2 (en) | 1994-01-04 | 1995-01-04 | Detection of counterfeits such as counterfeit bills |
US08/674,349 US5918960A (en) | 1994-01-04 | 1996-07-02 | Detection of counterfeit objects, for instance counterfeit banknotes |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB939300333A GB9300333D0 (en) | 1993-01-09 | 1993-01-09 | Detection of counterfeit objects |
GB9300333.3 | 1993-01-09 | ||
GB939307838A GB9307838D0 (en) | 1993-01-09 | 1993-04-15 | Detection of counterfeit objects |
GB9307838.4 | 1993-04-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994016412A1 true WO1994016412A1 (en) | 1994-07-21 |
WO1994016412B1 WO1994016412B1 (en) | 1994-08-18 |
Family
ID=26302273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1994/000006 WO1994016412A1 (en) | 1993-01-09 | 1994-01-04 | Detection of counterfeit objects |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0679279B1 (en) |
JP (1) | JP3489681B2 (en) |
AU (1) | AU5820094A (en) |
DE (1) | DE69418596T2 (en) |
ES (1) | ES2132412T3 (en) |
RU (1) | RU2139571C1 (en) |
WO (1) | WO1994016412A1 (en) |
Cited By (38)
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GB2291705A (en) * | 1994-07-12 | 1996-01-31 | Mars Inc | Detection of counterfeit bank notes |
EP0722153A3 (en) * | 1995-01-11 | 1996-10-16 | Laurel Bank Machine Co | Bill discriminating apparatus |
WO1997001155A1 (en) * | 1995-06-20 | 1997-01-09 | Bellcon I/S | Method for testing of bank notes, especially dollar bills, and equipment for the implementation of the method |
EP0814438A2 (en) * | 1994-10-04 | 1997-12-29 | Cummins-Allison Corporation | Method and apparatus for discriminating, authenticating and/or counting documents |
US5806650A (en) * | 1994-11-14 | 1998-09-15 | Cummins-Allison Corp. | Currency discriminator having a jam detection and clearing mechanism and method of clearing a jam |
WO1998035323A3 (en) * | 1997-02-11 | 1998-10-22 | Cummins Allison Corp | Method and apparatus for authenticating and discriminating currency |
US5915518A (en) * | 1994-01-04 | 1999-06-29 | Mars, Incorporated | Detection of counterfeit objects, for instance counterfeit banknotes |
US5918960A (en) * | 1994-01-04 | 1999-07-06 | Mars Incorporated | Detection of counterfeit objects, for instance counterfeit banknotes |
US6128402A (en) * | 1994-03-08 | 2000-10-03 | Cummins-Allison | Automatic currency processing system |
WO2001059717A1 (en) * | 2000-02-10 | 2001-08-16 | Panoptic Limited | Apparatus for producing ultra-violet light |
DE10007887A1 (en) * | 2000-02-21 | 2001-08-23 | Giesecke & Devrient Gmbh | Method and device for checking the authenticity of printed objects |
FR2815751A1 (en) * | 2000-10-24 | 2002-04-26 | Montage Cablage Electronique S | Accessory for a machine to verify the authenticity documents such as bank notes and checks |
US6438262B1 (en) | 1996-02-05 | 2002-08-20 | Mars Incorporated | Security document validation |
US6603872B2 (en) | 1996-05-13 | 2003-08-05 | Cummins-Allison Corp. | Automated document processing system using full image scanning |
US6918482B2 (en) * | 1999-12-03 | 2005-07-19 | Giesecke & Devrient Gmbh | Device and method for verifying the authenticity of banknotes |
US7569825B2 (en) | 2004-02-12 | 2009-08-04 | Nidec Copal Corporation | Inspection device |
US7881519B2 (en) | 2001-09-27 | 2011-02-01 | Cummins-Allison Corp. | Document processing system using full image scanning |
US7913832B2 (en) | 2006-05-31 | 2011-03-29 | Mei, Inc. | Method and apparatus for validating bank notes |
US8126793B2 (en) | 2001-07-05 | 2012-02-28 | Cummins-Allison Corp. | Automated payment system and method |
US8162125B1 (en) | 1996-05-29 | 2012-04-24 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8169602B2 (en) | 1996-11-27 | 2012-05-01 | Cummins-Allison Corp. | Automated document processing system and method |
US8204293B2 (en) | 2007-03-09 | 2012-06-19 | Cummins-Allison Corp. | Document imaging and processing system |
US8391583B1 (en) | 2009-04-15 | 2013-03-05 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8417017B1 (en) | 2007-03-09 | 2013-04-09 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8428332B1 (en) | 2001-09-27 | 2013-04-23 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8433123B1 (en) | 2001-09-27 | 2013-04-30 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8437532B1 (en) | 2009-04-15 | 2013-05-07 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8437529B1 (en) | 2001-09-27 | 2013-05-07 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8437530B1 (en) | 2001-09-27 | 2013-05-07 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8459436B2 (en) | 2008-10-29 | 2013-06-11 | Cummins-Allison Corp. | System and method for processing currency bills and tickets |
US8478020B1 (en) | 1996-11-27 | 2013-07-02 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8538123B1 (en) | 2007-03-09 | 2013-09-17 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8627939B1 (en) | 2002-09-25 | 2014-01-14 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
WO2014018712A2 (en) * | 2012-07-27 | 2014-01-30 | Toshiba International Corporation | System and method for the detection of soiling in bank notes |
US8929640B1 (en) | 2009-04-15 | 2015-01-06 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US8944234B1 (en) | 2001-09-27 | 2015-02-03 | Cummins-Allison Corp. | Apparatus and system for imaging currency bills and financial documents and method for using the same |
US9141876B1 (en) | 2013-02-22 | 2015-09-22 | Cummins-Allison Corp. | Apparatus and system for processing currency bills and financial documents and method for using the same |
US9818249B1 (en) | 2002-09-04 | 2017-11-14 | Copilot Ventures Fund Iii Llc | Authentication method and system |
Families Citing this family (4)
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GB0002977D0 (en) | 2000-02-09 | 2000-03-29 | Rue De Int Ltd | Detector |
DE10160578A1 (en) | 2001-12-10 | 2004-02-12 | Giesecke & Devrient Gmbh | Method and device for checking the authenticity of sheet material |
US6896118B2 (en) | 2002-01-10 | 2005-05-24 | Cummins-Allison Corp. | Coin redemption system |
GB0525664D0 (en) * | 2005-12-16 | 2006-01-25 | Filtrona Plc | Detector |
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GB2047402B (en) * | 1979-03-06 | 1983-03-09 | De La Rue Thomas & Co Ltd | Watermark detection |
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1994
- 1994-01-04 WO PCT/GB1994/000006 patent/WO1994016412A1/en not_active Application Discontinuation
- 1994-01-04 RU RU95117090A patent/RU2139571C1/en not_active IP Right Cessation
- 1994-01-04 ES ES94920841T patent/ES2132412T3/en not_active Expired - Lifetime
- 1994-01-04 EP EP94920841A patent/EP0679279B1/en not_active Revoked
- 1994-01-04 AU AU58200/94A patent/AU5820094A/en not_active Abandoned
- 1994-01-04 DE DE69418596T patent/DE69418596T2/en not_active Revoked
- 1994-01-04 JP JP51579494A patent/JP3489681B2/en not_active Expired - Fee Related
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US4146792A (en) * | 1973-04-30 | 1979-03-27 | G.A.O. Gesellschaft Fur Automation Und Organisation Mbh | Paper secured against forgery and device for checking the authenticity of such papers |
FR2593840A1 (en) * | 1986-02-05 | 1987-08-07 | Arjomari Prioux | Security paper comprising a fluorescent marking and recognition means |
EP0257749A1 (en) * | 1986-07-04 | 1988-03-02 | De La Rue Systems Limited | Methods and apparatus for monitoring the diffuse reflectivity of a surface |
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Cited By (96)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0738408B1 (en) * | 1994-01-04 | 2002-09-11 | Mars Incorporated | Detection of counterfeits objects, for instance counterfeits banknotes |
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Also Published As
Publication number | Publication date |
---|---|
EP0679279B1 (en) | 1999-05-19 |
DE69418596D1 (en) | 1999-06-24 |
AU5820094A (en) | 1994-08-15 |
ES2132412T3 (en) | 1999-08-16 |
RU2139571C1 (en) | 1999-10-10 |
JPH08505253A (en) | 1996-06-04 |
EP0679279A1 (en) | 1995-11-02 |
JP3489681B2 (en) | 2004-01-26 |
DE69418596T2 (en) | 2000-01-20 |
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