EP3825140A1 - Indicateur de sécurité, procédé de détection d'un indicateur de sécurité et système de détection d'un indicateur de sécurité - Google Patents

Indicateur de sécurité, procédé de détection d'un indicateur de sécurité et système de détection d'un indicateur de sécurité Download PDF

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Publication number
EP3825140A1
EP3825140A1 EP19211338.9A EP19211338A EP3825140A1 EP 3825140 A1 EP3825140 A1 EP 3825140A1 EP 19211338 A EP19211338 A EP 19211338A EP 3825140 A1 EP3825140 A1 EP 3825140A1
Authority
EP
European Patent Office
Prior art keywords
light
wavelength range
wavelength
range
security
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
EP19211338.9A
Other languages
German (de)
English (en)
Other versions
EP3825140B1 (fr
Inventor
Johann A LÖNING
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.)
Envipco Holding NV
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Envipco Holding NV
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Filing date
Publication date
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Priority to EP19211338.9A priority Critical patent/EP3825140B1/fr
Publication of EP3825140A1 publication Critical patent/EP3825140A1/fr
Application granted granted Critical
Publication of EP3825140B1 publication Critical patent/EP3825140B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • G07D7/003—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 security elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • 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
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/205—Matching spectral properties
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/20—Advertising or display means not otherwise provided for using special optical effects with colour-mixing effects
    • G09F19/205—Special effects using different wavelengths
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0272—Labels for containers
    • G09F2003/0273—Labels for bottles, flasks

Definitions

  • the present invention relates to a security sign, a method for capturing a security sign and a system for capturing a security sign.
  • Some containers, reusable containers or packaging such as bottles, cans, bags, boxes and other containers, can be returned after emptying and returned to a cycle and partially refilled.
  • a deposit is retained with which the buyer is to be encouraged to return the emptied reusable container to a certain point.
  • the return can take place automatically, in particular with machines or return machines, which reimburse the buyer for the withheld deposit.
  • the returnable containers can have a security mark so that the returnee does not receive the deposit value without authorization. Numerous machines only reimburse the deposit value after the security mark has been positively checked to the person returning it.
  • security signs for application to a carrier, in particular on a container or packaging, the security signs having a first color element which is designed in the form of a flat surface.
  • a security mark is, for example, from DE 10 2006 011 143 A1 known.
  • the security mark of the first aspect is suitable for application to a carrier, in particular to a container or packaging.
  • the safety sign has a planar first color element.
  • the first color element is designed to emit light with an emission wavelength different from the first wavelength when irradiated with light of a first wavelength range, also called the excitation wavelength range, which contains light of a first wavelength.
  • the first wavelength is 450 nm and / or 626 nm
  • the emission wavelength is 735 nm.
  • the first color element When irradiated with light of a second wavelength range that differs from the first wavelength range, the first color element is designed to be permeable to the light from the second wavelength range, preferably to have a transmittance of at least 90%. However, it is also possible for the transmittance to be less than 90%, so that when irradiated with light from the second wavelength range, the first color element absorbs part of it. When irradiated with light from a third wavelength range that differs from the second wavelength range, the first color element can absorb and / or reflect the light from the third wavelength range.
  • the system of the third aspect is for detecting a security token.
  • the system is preferably designed to carry out the aforementioned method.
  • the system has a positioning device for receiving a carrier, preferably a container or packaging, and a light source which is designed to emit light onto a system-independent security mark in a first wavelength range, the first wavelength range, also called the excitation wavelength range, being a first wavelength and wherein the light source is configured to emit light onto the security sign in a second wavelength range and / or in a third wavelength range, the first and third wavelength ranges being different from the second wavelength range.
  • the system further comprises a sensor device, the sensor device being designed to receive light emanating from the security sign in a fourth wavelength range which contains an emission wavelength that differs from the first wavelength.
  • This system also includes an evaluation device which is designed to output a signal that is dependent on the intensity of the light falling on the sensor device in the fourth wavelength range.
  • the security sign according to the invention When the security sign according to the invention is irradiated with light in the first wavelength range, it then emits light with an emission wavelength different from the first wavelength.
  • the intensity of the light emitted with the emission wavelength can also be recorded and evaluated, whereby the security mark can be distinguished more reliably.
  • wavelength range visible to the human eye with wavelengths from 380 nm to 700 nm and a wavelength range from 280 nm to 1100 nm that can be detected by a sensor device.
  • the security mark has at least one, in particular two-dimensional, first color element.
  • the security sign can have a plurality of first color elements that are applied to the outer surface of the carrier (substrate), e.g. B. the container or the packaging, can be arranged adjacent to one another.
  • the security mark, in particular its first color element can be connected to the carrier or applied to an outer surface of the carrier.
  • the security mark can be applied as a layer on the carrier, in particular on the outer surface, in particular printed or sprayed.
  • the security mark can have a carrier element that can be mechanically connected or glued to the carrier.
  • the carrier element can be a plastic or metal foil.
  • the security mark, in particular having the carrier element can have a layer thickness of 0.7 to 1.3 ⁇ m, in particular when it is applied to the carrier.
  • the first color element can initially be in liquid form, in particular with a solvent, or as a powder before the security mark is applied to the carrier.
  • the first color element can have at least one alphanumeric character and / or a two-dimensional area.
  • the first color element can in particular be applied to the carrier element as a layer.
  • the security mark can have positioning marks which are used to position the security mark or the carrier, e.g. B. the container or the packaging, in particular in a return machine, for an improved detection of the security symbol, are used.
  • the security mark can have further color elements, in particular with an alphanumeric character, barcode and / or matrix code, which serve to distinguish the security mark from a forgery.
  • the first wavelength range also called the excitation wavelength range
  • the first wavelength range is between 280 nm and 700 nm, the first wavelength preferably being 450 nm and / or 626 nm.
  • the security sign can be designed to emit visible light when it is irradiated with light of this first wavelength range.
  • the emission wavelength can be 735 nm, which is emitted when the first color element is irradiated with light of this first wavelength range.
  • the second wavelength range is in the infrared light range, in particular between 700 nm and 1100 nm.
  • the security sign in particular its first color element, can be designed to emit no light, in particular no visible light, when it is irradiated with light of this second wavelength range becomes.
  • the incident light from the second wavelength range is transmitted to a certain first portion and absorbed to a certain second portion, the ratio of the first and second portion forming the transmittance.
  • the third wavelength range is in the visible range, in particular between 380 nm and 700 nm.
  • the security sign has a second color element which is designed to absorb and / or reflect light from the second wavelength range when the security sign is irradiated, the second color element being designed between the first color element and the substrate, e.g. B. the carrier to be arranged.
  • the second color element can initially be in liquid form, in particular with a solvent, or as a powder before the security mark is applied to the carrier.
  • the second color element can have at least one alphanumeric character and / or a two-dimensional area.
  • the first and the second color element can form two layers of the security sign, wherein the second color element can be designed to be applied directly to the substrate. If the security sign has a carrier element, the second color element can be applied directly to the carrier element and the first color element can be applied to the second color element.
  • the first color element can be partially transparent to the light from the first wavelength range.
  • the second color element when the security sign is irradiated with light from the second wavelength range, the second color element can be detected by a sensor device. This is because the light of the second wavelength range can pass through the first color element, since this is permeable to light of the second wavelength range. This information about the second color element can additionally be used to determine the authenticity of a security symbol.
  • steps S1, S2 of the method according to the invention it is advantageous if an angle of incidence of the light of 45 ° on the security sign is avoided.
  • the light source can be designed to emit light exclusively with the wavelengths 450 nm, 550 nm, 626 nm and / or 900 nm.
  • Another embodiment of the method according to the second aspect also has the following step: S4 Detection of the shape of the safety sign on the basis of the light received during step S3 with the sensor device, which is signal-connected to an evaluation device (6). In this way it can be ensured that only those security symbols are recognized as genuine whose shape or form corresponds to the original.
  • the fourth wavelength range is different from the first wavelength range.
  • the light which is emitted by the color element of the security sign with the emission wavelength which is in the fourth wavelength range can be more easily distinguished from light which is reflected towards a sensor device when it is irradiated with light of the first wavelength range.
  • the fourth wavelength range is different from the second wavelength range and from the third wavelength range.
  • the security sign can be irradiated with light from the second and third wavelength range without reflections towards the sensor device, with which light with the emission wavelength is detected, interfering with the detection of the intensity of the light with the emission wavelength. It is only necessary that the sensor device is designed, for example by means of a corresponding filter, in such a way that it is sensitive only to the fourth wavelength range.
  • the first wavelength range also called the excitation wavelength range
  • the first wavelength range is between 280 nm and 700 nm, preferably the first wavelength being 450 nm and / or 626 nm.
  • the second wavelength range is in the infrared light range, in particular between 700 nm and 1100 nm.
  • the third wavelength range is in the visible range, in particular between 380 nm and 700 nm.
  • a preferred embodiment is characterized in that the light source is arranged with respect to the security sign to be detected in such a way that the angle of incidence of the light on the security sign is different from 45 °.
  • a first temporal pulse pattern is impressed on the light from the first wavelength range during the irradiation.
  • the first pulse pattern can have a time sequence of light pulses with pauses in between.
  • the irradiation with light visible to the eye is preferably carried out according to the first pulse pattern. This makes it possible in a simple manner to distinguish the emitted light with the first emission wavelength detected therein from other detected scattered light in a sensor device. This is because the light that is due to the emission induced by the irradiation with light from the first wavelength range in the color element and that has the emission wavelength also necessarily has the first pulse pattern, so that it can already be identified by its temporal course.
  • One embodiment includes that a second temporal pulse pattern is impressed on the light from the second wavelength range during irradiation and / or a third temporal pulse pattern is impressed upon the light from the third wavelength range during irradiation, the second and third pulse patterns from each other and from the first temporal pulse pattern Pulse patterns are different. This makes it possible to distinguish the light of the second and third wavelength range backscattered from the security sign in a sensor device from one another and from the light with the emission wavelength through the respectively different temporal progression.
  • the sensor device can receive electromagnetic waves and can provide a signal proportional to the received intensity. It can have a CMOS sensor, a CCD sensor, a silicon-based sensor, a germanium-based sensor or a combination of these sensors.
  • the light source has a first light source element, preferably one or more LEDs (Light Emitting Diode / light emitting diode), which can emit light in the first wavelength range and / or third wavelength range, and a second light source element, preferably one or more LEDs which can emit light in the second wavelength range.
  • a light source with LEDs can mean that the light of the first wavelength range emitted by the light source essentially only contains light with the first wavelength. This can also result in the light of the second and third wavelength range emitted by the light source essentially only containing light with the single wavelength, the wavelength of the light of the third wavelength range deviating from that of the first wavelength range.
  • the light source can, however, also be designed in such a way that it emits “white” light that includes the first, second and third wavelength ranges.
  • the system has a positioning device in which the carrier, so z.
  • B. a container or packaging that can be used to place safety signs.
  • One embodiment of a system has a first optical filter which can be arranged at a first position between the light source and the positioning device and can be moved away from this position, the first optical filter being transparent to light of the first wavelength and opaque to light of the emission wavelength. Particularly when using a light source which emits “white” light, this prevents light with the emission wavelength from being able to strike the security sign, the reflection of which could interfere with the detection of the emitted light with the emission wavelength.
  • the first optical filter can be designed as a low-pass filter, preferably with a cut-off wavelength between 450 nm and 735 nm, more preferably between 626 nm and 735 nm.
  • a low-pass filter in the sense of the present invention is designed to allow light with a wavelength below a cut-off wavelength to pass almost unattenuated, while light with a wavelength above the cut-off wavelength is blocked.
  • the transmission coefficient which indicates the ratio of the intensity of light after passing through the filter relative to the intensity before passing through the filter, is almost equal to one for wavelengths below the cutoff wavelength, while it is equal to zero above the cutoff wavelength.
  • the cut-off wavelength is the wavelength at which the transmission coefficient in the area of the transition between the pass band and the blocking area assumes a value of 0.5.
  • a further embodiment of the system according to the invention is provided with a second optical filter which is arranged at a second position between the positioning device and the sensor device and can be moved away from this position, the second optical filter being transparent for light with the emission wavelength and for light from the first wavelength range, which has a wavelength outside a range around the emission wavelength, is opaque.
  • the second optical filter can preferably be designed in particular as a bandpass filter, the first cut-off wavelength being below the emission wavelength and the second cut-off wavelength above the emission wavelength.
  • a band-pass filter in the sense of the present invention is designed to block light with a wavelength below a first cut-off wavelength, while light with a wavelength above the first cut-off wavelength below a second cut-off wavelength can pass the filter almost unattenuated. Light with a wavelength above the second cut-off wavelength is in turn blocked.
  • the transmission coefficient which indicates the ratio of the intensity of light after passing through the filter relative to the intensity before passing through the filter, is almost equal to zero for wavelengths below the first cut-off wavelength, while it is above the first cut-off wavelength and below the second cut-off wavelength is almost equal to one. Above the second cut-off wavelength, the transmission coefficient is equal to zero.
  • the limit wavelengths are the wavelengths at which the transmission coefficient assumes a value of 0.5 in the area of the transition between the pass band and the blocking areas.
  • a first optical filter is provided, which is arranged at a first position between the light source and the positioning device and can be moved away from this position, the first optical filter being a low-pass filter, preferably with a cut-off wavelength between 450 nm and 735 nm, more preferably between 626 nm and 735 nm.
  • a second optical filter can be provided in this embodiment, which is arranged at a second position between the positioning device and the sensor device and can be moved away from this position and which can be used as a high-pass filter with a cut-off wavelength smaller than the emission wavelength and larger than the cut-off wavelength of the low-pass filter is designed.
  • a high-pass filter in the sense of the present invention is designed to block light with a wavelength below a cut-off wavelength, while light with a wavelength above the cut-off wavelength can pass the filter almost without attenuation.
  • the transmission coefficient which indicates the ratio of the intensity of light after passing through the filter relative to the intensity before passing through the filter, is almost equal to one for wavelengths above the cutoff wavelength, while it is zero below the cutoff wavelength.
  • the cut-off wavelength is the wavelength at which the transmission coefficient assumes a value of 0.5 in the area of the transition between the pass band and the blocking area.
  • a further preferred embodiment of a system according to the invention has a third optical filter which is arranged at a first position between the light source and the positioning device and can be moved away from this position and which is transparent to light from the second wavelength range and to light from the first and / or or third wavelength range is opaque.
  • a third optical filter which is arranged at a first position between the light source and the positioning device and can be moved away from this position and which is transparent to light from the second wavelength range and to light from the first and / or or third wavelength range is opaque.
  • a fourth optical filter is provided in a system according to the invention, which is arranged at a second position between the positioning device and the sensor device and can be moved away from this position and which is transparent for light from the second wavelength range and for light from the first and / or third wavelength range is opaque. This also ensures that only light from the second wave range can reach the sensor device.
  • the third and / or the fourth optical filter can be designed as a high-pass filter, preferably with a cutoff wavelength between 700 nm and 1000 nm.
  • a fifth optical filter can be provided, which is arranged at a first position between the light source and the positioning device and from this position can be moved away and which is transparent to light from the third wavelength range and opaque to light from the second wavelength range. In this way, especially when using a light source which emits “white” light, it is achieved that only light of the third wavelength range from the light source to the security sign and then also to the sensor device.
  • a sixth optical filter can be provided, which is arranged at a second position between the positioning device and the sensor device and can be moved away from this position and which is transparent for light from the third wavelength range and for light from the second Wavelength range is opaque. This also ensures that only light from the wavelength range reaches the sensor device.
  • the fifth and / or the sixth optical filter can be designed as a low-pass filter, preferably with a cutoff wavelength between 700 nm and 1000 nm.
  • Fig. 1 shows an image of a first embodiment of a security sign 1 with a plurality of first color elements 3, which by way of example form an alphanumeric character sequence “lor”.
  • the first color elements 3 are applied to a carrier (not shown) such as a packaging or a container, for example by printing, and are designed such that the first color elements 3 in the case of the in FIG Fig. 1 Irradiation shown with light from a so-called third wavelength range, here visible light, which here has wavelengths between 470 nm and 700 nm, appear black or dark to the human eye and also for a CMOS camera compared to the gray background. This is the case because the first color elements 3 absorb the light from the third wavelength range which is incident on them.
  • a carrier such as a packaging or a container, for example by printing
  • the two dark triangles 5 form positioning marks and are designed here to absorb light between 300 nm and 1200 nm.
  • FIG. 11 shows an image of the security token 1 of FIG Fig. 1 when irradiated with light of the first wavelength 450 nm from the so-called first wavelength range, which here extends between 280 nm and 700 nm.
  • the first wavelength can also be 626 nm, for example.
  • the first color elements 3 fluoresce during this irradiation in that they emit light with an emission wavelength, in the exemplary embodiment described here, 735 nm, and appear bright or white.
  • the other color elements 7 (“PP2”, “P2”) and the triangles 5 appear black or dark, since they absorb the light from the first wavelength range or the first wavelength.
  • FIG. 3 shows an image of the security token 1 from FIG Fig. 1 and 2 under light from the so-called second wavelength range, here the infrared range, with a wavelength of 900 nm.
  • the first color elements are not recognizable because they do not differ in color from the gray background that is created by light from the second wavelength range that is backscattered on the carrier. Rather, they are permeable to the light from the second wavelength range, and in the embodiment described here, the transmittance for the light from the second wavelength range at 900 nm is at least 90%, ie the intensity of the light with the wavelength of 900 nm is after passing through the first color elements 3 still 90% of the intensity of the incident light.
  • the degree of transmission in the first color elements 3 for the light from the second Wavelength range is less than 90%, so that when irradiated with light from the second wavelength range, the first color elements 3 absorb part of it.
  • the first color elements 3 would stand out from the background in an image that is recorded when irradiated with light from the second wavelength range.
  • the triangles still appear black or dark to the eye and the camera.
  • the further color elements 7 “PP2”, “P2” are predominantly permeable to light of this wavelength and are hardly recognizable from the background.
  • FIG Fig. 4 The optical properties of the first exemplary embodiment of a security sign 1 and in particular those of the first color elements 3 are shown in FIG Fig. 4 once again shown schematically as a function of the wavelength of the light incident on the security sign 1 and emanating from it again.
  • Fig. 4 The following can initially be seen:
  • the first exemplary embodiment of a security sign 1 is irradiated with light from the first wavelength range W1, which contains the first wavelength A1, here visible light, the first wavelength A1 being 450 nm
  • the first color elements 3 emit as a result of the irradiation with light of the first wavelength A1, light with the emission wavelength A2, the emission wavelength A2 in the first exemplary embodiment being 735 nm.
  • the first color elements 3 therefore show fluorescence with the emission wavelength A2 when irradiated with the first wavelength A1, as indicated by the arrow F in FIG Fig. 4 is indicated.
  • the first color element 3 when the first color elements 3 are irradiated with light from the first wavelength range which contains a further first wavelength A1 of 626 nm, the first color element 3 then also shows fluorescence at 735 nm. This is illustrated by the arrow F.
  • a sensor device the sensitivity of which is represented as a function of the wavelength by the curve labeled SE, it being possible to see that the sensor device ranges from the visible to in the infrared range is sensitive.
  • the sensor device is sensitive over a larger area than is the case with the human eye, the sensitivity of which has the profile marked with v ( ⁇ ).
  • Fig. 4 it can be seen that when the first security mark 1 is emitted with light from a second wavelength range W2, which in the preferred exemplary embodiment described here comprises the infrared light range, in particular light with a wavelength between 700 nm and 1100 nm, this light forms the first color elements 3 happens almost without loss of intensity and is scattered back by the carrier arranged under the first color elements 3.
  • This process is shown as an example for infrared light B with a wavelength of 900 nm.
  • the first color elements are 3 when irradiated with light from the second wavelength range W2 cannot be recognized in an image recorded by a sensor device and do not stand out from their surroundings. This is already in Fig. 3 has been shown.
  • Fig. 4 It can also be seen that when the first color elements 3 of the security sign 1 are irradiated with light from a third wavelength range W3, in the preferred embodiment described here, like the first wavelength range W1, visible light with a wavelength between 380 nm and 700 nm, the first Color elements 3 absorb the light of the third wavelength range and this is not scattered in the direction of a sensor device.
  • Fig. 4 represented by the wavelength labeled "C" and corresponds to the image shown in FIG Fig. 1 is shown.
  • a sensor device When irradiated with light from the first wavelength range W1 with the first wavelength A1, here visible light with a first wavelength A1 of 450 nm, a sensor device, which if necessary through the use of a filter, is only sensitive to light with the emission wavelength A2, here 735 nm, it is checked whether the first color element 3 actually shows fluorescence and emits light of the emission wavelength A2 when it is irradiated with light from the first wavelength range W1.
  • the light source used for irradiation with light from the first wavelength range W1 is designed such that the first wavelength range W1 emitted by it is as in FIG Fig. 4 As shown extends far beyond the first wavelength A1, it makes sense that an optical filter in the form of a high-pass filter is arranged between the security sign and the sensor device, which blocks light with a wavelength below a cutoff wavelength and lets through light with a wavelength above the cutoff wavelength.
  • the transmission of such a filter has the in Fig. 4 with OF designated course, its cutoff wavelength, as in Fig. 4 is then selected so that it is greater than the upper limit of the first wavelength range W1 and smaller than the emission wavelength A2.
  • the optical filter is transparent to light with the emission wavelength A2 and opaque to light from the first wavelength range W1, which has a wavelength outside a range around the emission wavelength A2.
  • the sensor device which has the emission wavelength A2
  • the sensor device cannot be disturbed by scattered light which has a wavelength from the first wavelength range W1.
  • the shape of the first color element 3 can be checked by analyzing an image based on light from the third wavelength range has been detected by the sensor device.
  • FIGS 5a and 5b show images under light from the so-called second wavelength range, here infrared light with a wavelength of 900 nm, of a second and third exemplary embodiment of a security sign 1, which have a two-layer structure.
  • these security symbols 1 also have second color elements 9.
  • the second color elements 9 are below the "o" of the second for light Wavelength range permeable first color element 3 arranged. This means that the second color element 9 is arranged closer to the surface of the carrier, for example the container or the packaging, than the first color element 3.
  • each of the second color elements 9 includes the character “X”.
  • the Figures 5a and 5b show how the second and third exemplary embodiment of a security sign 1 is detected when irradiated with light from the second wavelength range, that is to say in the exemplary embodiment described here, infrared light with a wavelength of 900 nm.
  • the first color elements 3 "lor" are permeable to the light of this wavelength and do not differ from the gray background formed by the carrier.
  • the further color elements 7 “PP2”, “P2” hardly stand out from the background formed by the carrier when irradiated with light from the second wavelength range.
  • the second color elements 9 reflect the incident light passing through the first color element 3 and are clearly visible.
  • the second color elements 9 absorb the light passing through the first color element 3 and thus appear dark.
  • Fig. 6 shows cross-sections through several further exemplary embodiments of a security sign according to the invention.
  • the layers are shown spaced apart from one another, although in reality they are attached directly to one another.
  • the carrier 13, that is to say for example a container or a packaging on which the security symbols can be applied, is only shown in part.
  • the container can also have a rounded cross section.
  • the safety sign of a fifth embodiment has a carrier element 11 or carrier film, which can be connected to a carrier 13 in the form of a container.
  • the first color element 3 is applied to the carrier element 11 and has the same properties as the first color element 3 of the first embodiment, ie when irradiated with light from the first wavelength range with the first wavelength it emits light with the emission wavelength and when irradiated with light It is permeable to the second wavelength range, so that in this case the carrier element 11 determines how the first color element 3 appears when irradiated with light of the second wavelength range, here infrared light. Finally, the first color element 3 absorbs when irradiated with light from the third wavelength range (see FIG Fig. 1 ).
  • the security mark 1 according to the sixth embodiment Figure 6b has only a first color element 3 and manages without a carrier element.
  • the security mark 1 including the first color element 3 is applied directly to the outer surface of the carrier 13 or container, for example printed or sprayed through a mask.
  • the first color element 3 is designed in the way that has already been described in connection with the fifth exemplary embodiment.
  • the structure of the sixth exemplary embodiment thus corresponds essentially to that of the first exemplary embodiment, which is described in connection with FIGS Figs. 1 to 3 has been described.
  • a first color element 3 is arranged over a second color element 9, so that the latter is arranged closer to the carrier 13 or container.
  • the second color element 9 is thus arranged between the outer surface of the carrier 13 or container and the first color element 3.
  • the first color element 3 is configured in the same way as has already been described in connection with the fifth embodiment.
  • the second color element 9 is also designed in such a way that it absorbs light from the second wavelength range, that is to say infrared light in the exemplary embodiment described here. This means that the second color element 9 appears dark in an image of the seventh exemplary embodiment, which is recorded when irradiated with infrared light.
  • the structure of the seventh exemplary embodiment thus essentially corresponds to that of the fourth exemplary embodiment Figure 5b .
  • the safety symbol 1 of the eighth embodiment is a combination of the fifth and seventh exemplary embodiment in that the security sign 1 according to the eighth exemplary embodiment has a first color element 3, a second color element 9 covered by it and a carrier element 11, the carrier element 11 being attached to the carrier 13 or the container.
  • the first and the second color element 3, 9 are constructed in the way that has already been described in connection with the fifth and seventh exemplary embodiments.
  • the safety sign 1 of the ninth embodiment has two first color elements 3 and a second color element 9.
  • One of the first color elements 3 covers the second color element 9, so that it is arranged between the first color element 3 and the carrier 13 in the form of the container 13.
  • This ninth embodiment a security sign 1 can be applied directly to the outer surface of the carrier 13 or the container, in particular printed or sprayed, in two operations.
  • the first and the second color element 3, 9 are constructed in the way that has already been described in connection with the fifth and seventh exemplary embodiments.
  • Fig. 7 shows schematically an embodiment of a system for detecting a security token 1, which is attached to a carrier 13, for example in the form of a container.
  • the system has a schematically illustrated housing 17, which prevents large amounts of scattered light from the environment from reaching the area of the system and influencing the detection of a security sign.
  • a positioning device 19 is provided within the housing 17 with which a carrier 13, for example a container or a packaging, can be positioned in such a way that a security mark 1 attached to the carrier 13 is arranged within the system so that it can be illuminated with light from a
  • the light source 21 of the system 15 is irradiated and the light emanating from the security sign 1 during the irradiation can be detected by a sensor device 23 of the system 15.
  • the positioning device 19 can be designed as a combination of conveyor belts and rollers, which make it possible to convey a carrier 13 in a longitudinal direction and to rotate it in the process.
  • the positioning device 19 it is also possible for the positioning device 19 to be designed as a turntable with which the carrier 13 can be aligned.
  • the present invention is also not restricted to the two aforementioned examples of positioning devices, but rather other devices can also be used which make it possible to align a carrier 13 with the light source 21 and the sensor device 23.
  • the light source 21 can have a first light source element, preferably one or more LEDs, which can emit light in the first wavelength range.
  • the first wavelength range comprises light with wavelengths between 280 nm and 700 nm and in particular the first light source element, if it has LEDs, can essentially only emit light with a first wavelength of 450 nm.
  • the first light source element can emit light in the third wavelength range, namely in the preferred exemplary embodiment described here in the range between 380 nm and 700 nm, wherein the first light source element, in particular when it has LEDs, can essentially only emit light with a wavelength which, however, deviates from the first wavelength of 450 nm.
  • the light source 21 can have a second light source element, likewise preferably one or more LEDs, which can emit light in the second wavelength range, namely in the infrared range between 700 nm and 1100 nm.
  • the light source 21 can, however, also be designed in such a way that it emits “white” light which comprises the first, second and third wavelength ranges.
  • the light source elements of the light source 21 are designed in such a way that a first temporal pulse pattern is impressed on the light from the first wavelength range, a second pulse pattern on the light from the second wavelength range and a third temporal pulse pattern on the light from the third wavelength range, the pulse patterns being different from each other.
  • the sensor device 23 of the exemplary embodiment of the system can receive light emanating from the security sign 1 and in particular electromagnetic waves and can provide a signal proportional to the received intensity. It can have a CMOS sensor, a CCD sensor, a silicon-based sensor, a germanium-based sensor or a combination of these sensors. The sensor device 23 is finally connected to an evaluation device 25.
  • the light source 21, the positioning device 19 and the sensor device 23 are arranged in such a way that an angle of incidence on the security sign 1 of 45 ° is avoided. Furthermore, an angle of 90 ° between the light beam from the light source 21 and the light beam towards the sensor device 23 is likewise avoided in this preferred exemplary embodiment.
  • a position P1 and a second position P2 are provided for optical filters, the first position P1 being arranged between the light source 21 and the positioning device 19 in such a way that light emitted from the light source 21 onto the security sign 1 a carrier 13 picked up by the positioning device 19 falls, passes the first position P1 and a filter arranged there.
  • the second position P2 is arranged in such a way that light emitted by a security sign 1 that is on a in the positioning device 19 arranged carrier 13 is attached, then goes out when the security sign 1 is irradiated by the light source 21, a filter in the second position P2 passes.
  • the exemplary embodiment of a system according to the invention can have a first optical filter 27 which can be arranged at the first position P1 between the light source 21 and the positioning device 23 and can be moved away from this position, i. H. it can be moved between the first position P1 and a position in which light from the light source 21 does not pass through the first filter when it reaches the positioning device 19.
  • the first optical filter 27 is for light of the first wavelength, i. H. here 450 nm, transparent and for light of the emission wavelength, d. H. here 735 nm, impermeable.
  • the first optical filter 27 can be designed as a low-pass filter, preferably with a cutoff wavelength between 450 nm and 735 nm, more preferably between 626 nm and 735 nm.
  • the exemplary embodiment of a system according to the invention can have a second optical filter 29, which can be arranged at the second position P2 between the positioning device 19 and the sensor device 23 and moved away from this position, particularly when using a light source 21 which emits "white" light .
  • the second optical filter 29 is for light with the emission wavelength, i. H. here 735 nm, transparent and impermeable to light from the first wavelength range, which has a wavelength outside a range around the emission wavelength.
  • the second optical filter 29 can be designed as a bandpass filter with a center wavelength that corresponds to the emission wavelength.
  • the first optical filter 27 is designed as a low-pass filter, preferably with a cut-off wavelength between 450 nm and 735 nm, more preferably between 626 nm and 735 nm, and the second optical filter 29 as a high-pass filter with a cut-off wavelength smaller than that Emission wavelength, d. H. preferably smaller than 735 nm and larger than the cut-off wavelength of the low-pass filter.
  • the exemplary embodiment of a system according to the invention can be provided with a third optical filter 31, particularly when using a light source 21 which emits "white" light, which, like the first optical filter 27, is arranged at the first position P1 and moves away from this position and the one for light is permeable from the second wavelength range and impermeable to light from the first and / or third wavelength range.
  • the third optical filter 31 is permeable to infrared light with a wavelength in the range of 700 nm and 1100 nm, while visible light with a smaller wavelength cannot pass through the third optical filter.
  • the exemplary embodiment of a system according to the invention can be provided with a fourth optical filter 33, especially when using a light source 21 which emits "white" light, which, like the second optical filter 29, is arranged at a second position P2 and moves away from this position and which is transparent to light from the second wavelength range, that is to say infrared light in the exemplary embodiment described here, and impermeable to light from the first and / or third wavelength range, in the exemplary embodiment described here, visible light.
  • the third and / or the fourth optical filter 31, 33 can be designed as a high-pass filter, preferably with a cut-off wavelength between 700 nm and 1000 nm.
  • the exemplary embodiment of a system according to the invention can be provided with a fifth optical filter 35, especially when using a light source 21 which emits "white" light, which, like the first optical filter 27, is arranged at the first position P1 and moves away from this position and which is permeable to light from the third wavelength range, in the present exemplary embodiment visible light, and impermeable to light from the second wavelength range, in the present exemplary embodiment infrared light.
  • a fifth optical filter 35 especially when using a light source 21 which emits "white" light, which, like the first optical filter 27, is arranged at the first position P1 and moves away from this position and which is permeable to light from the third wavelength range, in the present exemplary embodiment visible light, and impermeable to light from the second wavelength range, in the present exemplary embodiment infrared light.
  • the exemplary embodiment of a system according to the invention can be provided with a sixth optical filter 37 which, like the second optical filter 29, can be arranged at the second position P2 and moved away from this position and which is for light from the third wavelength range, i.e. in the present case Embodiment is visible light, permeable and impermeable to light from the second wavelength range.
  • the fifth and / or the sixth optical filter 35, 37 can be designed as a low-pass filter, preferably with a cutoff wavelength between 700 nm and 1000 nm.
  • the system 15 described above can be operated as follows to detect a security mark 1 on a carrier 13:
  • the security sign 1 is irradiated with light in the first wavelength range which contains light of the first wavelength.
  • this is visible light
  • the first wavelength is 450 nm.
  • the first optical filter 27 can be moved to the first position P1 so that the light from the Light source 21 has to pass through the first optical filter 27, which allows light of the first wavelength to pass through, but which is impermeable to light of the emission wavelength, here 735 nm.
  • the security sign 1 is irradiated with light from a second wavelength range and with light from a third wavelength range, parallel to step S1 or before or after it.
  • the second wavelength range is in the infrared light range and the first wavelength range is in the visible range.
  • steps S1 and S2 do not run in parallel, i.e. the light source 21 does not emit broadband light that extends from the visible range to the infrared range
  • the third filter 31 can initially be moved to the first position P1 and the fourth filter 33 during step S2 moved to the second position P2.
  • the security sign 1 only light coming from there in the second wavelength range, in the present exemplary embodiment also infrared light, reaches the sensor device 23.
  • step S2 first the fifth filter 35 can be moved to the first position P1 and the sixth filter 37 can be moved to the second position P2.
  • the security sign 1 only light coming from there in the third wavelength range, in the present exemplary embodiment also visible, reaches the sensor device 23.
  • step S1 the light emanating from the security sign 1 during the irradiation is detected with the sensor device in a step S3.
  • step S1 i. H.
  • the intensity of the light emanating from the security mark 1 is detected by the sensor device 23 within a fourth wavelength range, which is the emission wavelength, 735 nm in the exemplary embodiment , contains.
  • the evaluation device 25 can determine, as a first authenticity criterion, whether the security mark 1 located on the carrier 13 in the positioning device 19 is genuine is.
  • step S2 when the security sign is irradiated with light from the second wavelength range, in the present exemplary embodiment infrared light, the shape of the security sign is determined with the sensor device 23, based on the light from the second wavelength range becomes. Since the first color element 3 is permeable to light from the second wavelength range, the shape determined in this way, which may be the shape of the second color element 9 (see FIG Figures 5a and 5b ) represented under the first color element 3, a further authenticity criterion can be checked by the evaluation device 25.
  • step S2 when the security sign is irradiated with light from the third wavelength range, in the present exemplary embodiment visible light, the shape of the security sign 1 is also determined with the sensor device 23, with the light from the third Wavelength range is used as a basis.
  • the first color element 3 absorbs light from the third wavelength range, it appears dark when irradiated with light from the third wavelength range. From the shape of the first color element 3 determined in this way, a third authenticity criterion can be checked by the evaluation device 25, or the shape of the first color element 3 when irradiated in the second and third wavelength ranges can be compared with one another as a further authenticity criterion.
  • the sensor device can also use these pulse patterns to determine in which wavelength range the light emanating from the security mark 1 and detected by the sensor device must lie. This makes it possible to dispense with some of the filters 27, 29, 31, 33, 35, 37. In the same way, the filters can be dispensed with if the light source 21 is designed in such a way, for example by using LEDs, that it only emits light with defined wavelengths from the wavelength ranges.
  • the first wavelength range then only contains one wavelength, it is only necessary to prevent the light of the first wavelength from reaching the sensor device 23.
  • only one filter is then required at the second position P2 during step S1.

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EP19211338.9A 2019-11-25 2019-11-25 Marque de sécurité, procédure de détection d'un marque de sécurité et système de détection d'un marque de sécurité Active EP3825140B1 (fr)

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EP19211338.9A EP3825140B1 (fr) 2019-11-25 2019-11-25 Marque de sécurité, procédure de détection d'un marque de sécurité et système de détection d'un marque de sécurité

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EP19211338.9A EP3825140B1 (fr) 2019-11-25 2019-11-25 Marque de sécurité, procédure de détection d'un marque de sécurité et système de détection d'un marque de sécurité

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011143A1 (de) * 2005-11-04 2007-05-10 Mrv Multi Reverse Vending Gmbh Sicherheitsmarkierungssystem
WO2018197278A1 (fr) * 2017-04-26 2018-11-01 Muehlbauer GmbH & Co. KG Insert de sécurité muni d'une couche uv pour un document d'identité et procédé de fabrication d'un insert de sécurité muni d'une couche uv pour un document d'identité
WO2018224108A1 (fr) * 2017-06-07 2018-12-13 Dansk Retursystem A/S Marque de sécurité et procédé de validation de l'authenticité d'une marque de sécurité
EP3570256A1 (fr) * 2018-05-15 2019-11-20 DPG Deutsche Pfandsystem GmbH Procédé de vérification et dispositif de lecture pour un marquage de sécurité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006011143A1 (de) * 2005-11-04 2007-05-10 Mrv Multi Reverse Vending Gmbh Sicherheitsmarkierungssystem
WO2018197278A1 (fr) * 2017-04-26 2018-11-01 Muehlbauer GmbH & Co. KG Insert de sécurité muni d'une couche uv pour un document d'identité et procédé de fabrication d'un insert de sécurité muni d'une couche uv pour un document d'identité
WO2018224108A1 (fr) * 2017-06-07 2018-12-13 Dansk Retursystem A/S Marque de sécurité et procédé de validation de l'authenticité d'une marque de sécurité
EP3570256A1 (fr) * 2018-05-15 2019-11-20 DPG Deutsche Pfandsystem GmbH Procédé de vérification et dispositif de lecture pour un marquage de sécurité

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