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EP2686173B1 - Élément de sécurité doté d'un effet chromatique tridimensionnel et procédé de vérification et dispositif de vérification pour un tel élément de sécurité - Google Patents

Élément de sécurité doté d'un effet chromatique tridimensionnel et procédé de vérification et dispositif de vérification pour un tel élément de sécurité Download PDF

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Publication number
EP2686173B1
EP2686173B1 EP12709584.2A EP12709584A EP2686173B1 EP 2686173 B1 EP2686173 B1 EP 2686173B1 EP 12709584 A EP12709584 A EP 12709584A EP 2686173 B1 EP2686173 B1 EP 2686173B1
Authority
EP
European Patent Office
Prior art keywords
information
spectral
security element
information portion
electromagnetic radiation
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.)
Active
Application number
EP12709584.2A
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German (de)
English (en)
Other versions
EP2686173A1 (fr
Inventor
Andreas Frank
Thorsten Meyer
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
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Filing date
Publication date
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP2686173A1 publication Critical patent/EP2686173A1/fr
Application granted granted Critical
Publication of EP2686173B1 publication Critical patent/EP2686173B1/fr
Active legal-status Critical Current
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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
    • B42D25/305—Associated digital information
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/121—Apparatus characterised by sensor details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F7/00—Designs imitating three-dimensional effects
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties
    • B42D2033/20—
    • B42D2035/24—
    • B42D2035/34—
    • 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

Definitions

  • the invention relates to security elements for value and / or security documents and in particular to security elements which are colored and can be optically verified.
  • Security elements are those entities that have at least one feature that complicates and / or prevents copying, falsifying, duplicating, or the like of an object on which this entity is attached or in which this entity is integrated. Items that have at least one security feature or security element are called security documents. If these additionally embody a value, these are also referred to as value documents. Examples of security documents include, for example, passports, identity cards, driving licenses, access cards, but also labels and tickets, to name only a few.
  • Security documents which additionally embody a value and are therefore also referred to as value documents, include, for example, banknotes, postage stamps, tax stamps, vouchers, shares, to name only a few as well.
  • a precise delineation of the group of value documents is difficult, since, for example, bank or credit cards usually embody no value directly, but they allow a disposition of funds or the like.
  • security elements only fulfill their function if there is a possibility of verifying their authenticity. This makes it possible to distinguish the true security elements from counterfeit or corrupted security elements or copied security elements. Forgers often value and / or security documents are forged in such a way that the associated security elements are imitated or emulated as well as possible. Such counterfeits are also referred to as simulataneous counterfeits because they initially give the impression that the correct security element is present in the value and / or security document. Only with a more precise verification of the security element is then to determine that it is a falsification or other type of imitation.
  • security elements that can be verified by humans with the aid of simple aids, but also offer the possibility of mechanically verifying them with the aid of automated or semi-automated devices.
  • a security element it is desirable for a security element to give a pleasing aesthetic impression in order to give the valuable or security document a distinctive and / or aesthetically pleasing appearance.
  • the invention is therefore based on the technical problem of creating a novel security element for value and / or security documents.
  • the EP 1 780 031 A1 describes an article with a printed image.
  • the image consists of two partial images, wherein a first partial image in a red fluorescent ink and the second partial image in a green or blue fluorescent ink as negative images mutually so are arranged so that the partial images appear as a three-dimensional image simultaneously with each eye by a respective matched to the fluorescent inks of the two partial images color filter on the partial images viewers.
  • a preferred field of application of the article is packaging, packaging materials, packaging aids, securities or tickets with a tamper-proof and / or visually appealing surface area.
  • a watermark embedded in a picture which is more or less indecipherable under normal lighting conditions, but decipherable under UV light.
  • a pattern of a first color mixture is printed onto a substrate with optical brightening agents, which has the properties of strongly suppressing the fluorescence of the substrate and having a low contrast to the substrate or a second color mixture under normal illumination, adjacent to a second pattern is printed.
  • the second color mixture has the property of causing a different suppression of the fluorescence of the substrate.
  • the UV light is a different strong fluorescence of the substrate visible, so that a watermark can be formed over this.
  • the invention is based on the idea of creating a security element which comprises graphic information consisting of different pieces of information. At least two pieces of information are coded or formed so that they have a reflectance and / or transmission spectrum in a broadband excitation with electromagnetic radiation, for example white light, which comprises a continuous spectrum, which is dominated by a spectral distribution of a spectral color. The two pieces of information are formed so that they are dominated by different spectral colors. Ideally, the reflectance and / or transmission spectra correspond to those of a spectral color. This means that the remission and / or transmission spectrum in each case has a remission or transmission only in a contiguous narrow-band wavelength range.
  • such a security element comprising two pieces of information showing reflectance spectra of different spectral colors when illuminated with white, continuous light is viewed by means of a condenser lens exhibiting a strong chromatic aberration
  • the human observer thus perceives the differently colored information portions as if they were arranged in different spatial planes, so that a three-dimensional effect, ie in addition to the areal extent, adds a different spatial depth. This effect is referred to here as a 3D color effect.
  • loupes or magnifying lamps have also proven to be suitable, comprising, for example, a magnifying glass with 3 dioptres and a light source surrounding the magnifying glass, which is covered to a viewing side by a housing enclosing the magnifying glass and to a lighting and viewing object whose security element is verified should be, is open.
  • An appropriate distance may be easily selected depending on a loupe diameter, a diopter value and a vision of a human observer.
  • Such a security element offers, in particular, a very good protection against appearances of fake color graphics are created with multi-color printing systems.
  • Modern laser printers which for example have a cyan-yellow-magenta color system, are able to reproduce the graphic information in such a way that, when viewed and / or reproduced without chromatic aberration, they have an identical image or identical optical image Impression causes, however, an optical element is inserted, which influences the propagation direction wavelength dependent, for example, a lens with a strong chromatic aberration, so caused by the original security element 3D color effect is observed not or only greatly attenuated.
  • a spectral color is a color caused by light of a wavelength or a limited wavelength range.
  • a spectral distribution of a spectral color thus has an intensity which is different from zero only at one wavelength or a narrowly limited wavelength range.
  • the excitation with electromagnetic radiation is understood to mean the irradiation with electromagnetic radiation, in particular with light.
  • Remission here is the process in which electromagnetic radiation emanates from an object which is irradiated with electromagnetic radiation.
  • the radiation emitted by the object is regarded as remission radiation.
  • all physical processes are summarized in which the electromagnetic radiation does not pass through the object itself.
  • the remission thus includes both the diffuse and directed scattering and / or reflection as well as luminescence radiation, which is triggered by the irradiation with electromagnetic radiation. This only distinguishes the process in which the light passes through the object itself, which is referred to as transmission.
  • a remission spectrum is the spectrum of the electromagnetic radiation emanating from the object in the remission.
  • a transmission spectrum is the spectrum of the radiation transmitted through the article whose transmission spectrum is considered. The transmission spectrum may also comprise portions of a luminescence radiation which is excited on the basis of an irradiation of the object.
  • a spectrum is dominated by a spectral distribution of a spectral color means that the corresponding spectrum is more than half its Having intensity in a limited wavelength range, which causes a monochrome color impression of a spectral color in a viewer.
  • electromagnetic radiation is understood in particular light in the visible wavelength range, but also radiation in the infrared wavelength range and in the ultraviolet wavelength range.
  • white light is understood here electromagnetic radiation with a continuous spectrum, which includes the visible to a human observer wavelengths of the optical spectrum.
  • a contour information is that information that is determined by a contour of a graphic and / or graphical elements.
  • contour information of graphical elements are identical if their contours or images of the contours can be converted into each other by a scaling operation.
  • the 3D color effect refers to that effect which gives the impression to a human observer that information components which are arranged next to one another in a plane and cause different color impressions in the observer would be arranged at different distances from the observer. This is an effect that is not caused by perspective representations, but only due to the different colors of the information shares.
  • a security element for a value and / or security document for producing a 3D color effect comprises graphic information and wherein the graphic information comprises at least a first information part and a second information part, wherein the first information part and the second information part in the case of a broadband excitation with electromagnetic radiation, different spectral distributions in the remission and / or transmission spectrum have, it being provided according to the invention that the first information component and the second information component are designed so that their remission and / or transmission spectrum is dominated by a spectral distribution of a spectral color is or are.
  • a method which comprises the steps of illuminating the security element with electromagnetic radiation, guiding the electromagnetic radiation reflected or transmitted to the security element through at least one optical device which permits spatial propagation of the electromagnetic radiation Depending on the wavelength dependent electromagnetic radiation, detecting and evaluating a wavelength-resolved graphical image of the security element.
  • Such a verification can be carried out, for example, with a security element verification device having a 3D color effect of a security and / or security document comprising: a broadband electromagnetic radiation source for illuminating the security element, a detection device for detecting an optical image of the security element; Detection device is formed, preferably at the same time, spatially spatially resolved to detect at least two different spectral channels, and at least one optical device which affects a spatial propagation of the electromagnetic radiation wavelength dependent and is arranged or can be arranged such that a remitted or transmitted by the security element electromagnetic radiation when capturing the image is guided by the at least one optical device, and an evaluation device for evaluating the acquired Abfragun G.
  • a security element verification device having a 3D color effect of a security and / or security document comprising: a broadband electromagnetic radiation source for illuminating the security element, a detection device for detecting an optical image of the security element; Detection device is formed, preferably at the same time, spatially spatially resolved to detect at
  • the evaluation preferably comprises a comparison of the color values of a plurality of positions of the acquired image with expected color values for these positions.
  • the information components as provided in the case of a genuine security element, are designed or applied to the security element in such a way that they each have a reflectance or transmission spectrum dominated by a spectral color, then the different information portions corresponding to this spectral color and the associated wavelength only become imaged in a way.
  • a ray path of the radiation, which the an information component is formed is determined by the wavelength of the spectral color, which dominates the respective remission or transmission spectrum.
  • the information component is designed such that it causes a metameric color impression to the corresponding spectral color when viewed, but has a reflectance or transmission spectrum that is not dominated by only one spectral color, then the different spectral components along different imaging paths become due to the wavelength-dependent imaged so that the resulting images can be distinguished from each other. Checking the color values at different positions of the resulting image thus makes it possible to check whether it is a genuine security feature or a counterfeit security feature.
  • the first information component and the second information component are coded by means of colorants which each have a reflectance spectrum and / or transmission spectrum which, when excited with white visible light, is dominated by a spectral distribution of a spectral color in the visible wavelength range, the first information component are dominated by a first spectral color and the second information component by a second spectral color.
  • the information components are preferably each designed so that they are perceived as a whole or constituents thereof as monochrome, areal regions with suitable excitation with electromagnetic radiation. Even lines or points that are perceived as homogeneously monochromatic, are here understood as areal areas.
  • a particularly clear 3D color effect is perceivable when the wavelengths of the spectral colors have a particularly large wavelength spacing. This is the case, for example, if the first spectral color lies in the blue wavelength range and the second spectral color lies in the red wavelength range or vice versa. For example, when viewed through a large magnifying glass, the portion of information perceived as blue is perceived to be closer to the viewer than the other portion of information whose spectral color is in the red wavelength range. According to their arrangement in the wavelength spectrum, the other spectral colors are perceived at levels in between. Of course it is it is possible to encode further pieces of information in such a way that their reflectance spectra are dominated by other spectral colors.
  • the graphical information comprises at least a third information component which, when excitation with electromagnetic radiation in the non-visible wavelength range, in particular in the ultraviolet wavelength range, has a reflectance spectrum and / or a transmission spectrum which dominates by the spectral distribution of a third spectral color is.
  • the third spectral color is also in the visible wavelength range.
  • the graphical information additionally comprises a fourth information component, which has a reflectance spectrum and / or transmission spectrum when excited with electromagnetic radiation in the non-visible wavelength range, in particular in the ultraviolet wavelength range, which dominates by the spectral distribution of a fourth spectral color is and the first information component and the second information component in the excitation with electromagnetic radiation in the non-visible wavelength range show no or almost no remission or transmission in the visible wavelength range and the third and fourth information component in the excitation with white visible light no or almost no remission or show a white remission and / or no or almost no transmission or a white transmission in the visible wavelength range.
  • a white transmission is considered to be a transmission in which the white light is transmitted almost unattenuated or almost equally attenuated over the entire spectrum. This means that the transmission in the visible wavelength range is completely or almost wavelength-independent.
  • the first and the second information portion are visible, which show a 3D optical effect. If, however, the security element is viewed under excitation with non-visible electromagnetic radiation, for example UV radiation, then the third and the fourth information component are perceptible, which also show a 3D color effect. It is essential here that the third and the fourth spectral color must differ from one another. Otherwise, no relative depth effect is perceived by a human observer.
  • the first information component and the third information component comprise the same contour information. If the first and the third spectral color are different, the information represented by the contour information appears to change its distance relative to the viewer when the types of excitation between white-light excitation and non-visible radiation excitation, for example UV excitation, are changed.
  • the second and fourth spectral colors may be the same spectral color or nearly the same spectral color. This spatial movement of a contour in human perception taking place during a change of excitation can be further assisted by the fact that a planar expansion, i. Scaling the contour, making the contour larger in that portion of information whose spectral color is perceived as being closer to the viewer.
  • An embodiment therefore provides that expansion of the same contour information in the third information component has a greater extent than in the first information component if the third spectral color is considered to be more prominent when viewed by an optical device which influences the propagation of electromagnetic radiation as wavelength-dependent is perceived as the first spectral color, and otherwise has a smaller extent in the third information portion.
  • a wavelength difference of the first spectral color and the second spectral color is different from a wavelength difference of the third spectral color and the fourth spectral color.
  • the first information component and the third information component comprise the same contour information and the second and the fourth information component comprise a different contour information different from the first information component, which is identical in the second and fourth information component.
  • the first information component in the blue spectral color and the second information component in the red spectral color can be perceived by white light excitation and, after a change of the excitation, the third information component is perceived in red and the fourth information component in blue.
  • the contour information changes its planes when the excitations change.
  • the various information portions are applied by means of colorants in a plane of a security and / or value document by printing technology.
  • individualized and / or personalized information shares in the security element.
  • Such information is considered that can be assigned individually to an item in a group of similar items.
  • Personalizing is the information that can be assigned to a person.
  • Personalizing information includes, for example, a date of birth, a name, a birthplace, just to name a few. For example, a serial number of an ID card or a banknote can be individualizing.
  • a spectrally resolved contour recognition is performed and the determined contours, the positions of the determined contours and / or their intensity ratios in the individual spectral channels are compared with expected contours, positions and / or intensity ratios ,
  • a comparison of the intensity ratios within a spectral channel between different contours, which are caused by different information components, or between channels can be performed for contours, which can be assigned to the same information component. Since optical sensors are usually used to capture images, which can only distinguish a limited number of spectral channels, generally three channels for blue, green and red, for example, the detection areas of these channels overlap.
  • Light of a spectral color is thus usually detected in at least two spectral channels of a location and wavelength-selective sensor.
  • the remitted radiation of an information component is one dominated by a spectral color
  • the structures produced by that information in the different channels will produce edges only at those positions to which that spectral color is imaged.
  • edges of the same information will be detectable in the different color channels at different positions in the image, since the different spectral components are mapped differently with regard to their position. In this way, reliable verification by machine is possible.
  • the verification device may be provided to detect a reference image of the security element with the same or a comparable imaging geometry, but the at least one optical device which determines the geometric propagation of the electromagnetic Radiation is dependent on the wavelength, not arranged in the beam path and the expected positions of contours and / or intensity ratios of the spectral channels of the detection device and / or the expected color values are calculated based on the reference image and a knowledge of the at least one optical device.
  • the reference image is thus evaluated, at least with regard to such information shares, which are assigned to specific color values, as if this information were coded by means of colorants which reproduce this information by means of the corresponding spectral color with suitable excitation.
  • An evaluation device can be designed accordingly for the verifications described above.
  • an evaluation device is designed and implemented by means of a program-controlled computing unit.
  • this can be formed so that two matched or mutually calibrated detection devices are provided, which are arranged so that the wavelength-dependent propagation-influencing optical device only in the beam path of the one detection device is arranged.
  • the at least one optical device is movable, for example pivotable, into the beam path.
  • An embodiment can be designed such that movements of the at least one optical device in and / or out of the beam path can be carried out automatically.
  • verification devices are conceivable in which the document is detected by means of different detection devices, which at the same time perform a detection, but of different sections of the security element and / or sequentially capture the same part of the security element, only in the beam path of one of the detection devices, the at least one optical device is arranged, which influences a wavelength-dependent propagation of the electromagnetic radiation.
  • This may be for example a lens with a chromatic aberration.
  • Other embodiments of the at least one optical device include a prism, a grating, or the like.
  • a security document 1 which includes a security element 2, which shows a 3D color effect.
  • the security element comprises graphic information 3, which comprises a first information component 3-1, a second information component 3-2 and also another information component 3-5.
  • the different pieces of information 3-1, 3-2, 3-5 of the graphic information 3 are applied to the security document with different colorants, for example.
  • the security document may be, for example, a paper document or a plastic-based document.
  • the different information shares are all formed in one document level. It is understood by those skilled in the art that the individual pieces of information 3-1, 3-2, 3-5 can not be formed on the surface of the security document 1, but also in the interior of the security document 1.
  • the information portions are applied by printing technology in all embodiments described here.
  • An arrangement in a plane is also present when individual pieces of information are printed on top of each other.
  • multiple pieces of information may be printed or otherwise applied together with a printing ink or composition comprising different colorants.
  • one colorant shows a remission in the case of white light excitation, the other colorant on UV excitation.
  • An information portion may comprise several components, all of which have the same remission and / or transmission spectrum.
  • the individual pieces of information are each formed homogeneously monochrome, ie their constituents are perceived with suitable excitation as a flat homogeneously monochrome areas.
  • points or lines that are perceptible as such considered as flat.
  • a flat, homogeneously monochrome perceived Area can be created by printing technology from pixels whose extent is below the perceptual limit, as this is common for example in digital printing processes (laser printing, inkjet printing, etc.).
  • the different pieces of information 3-1, 3-2, 3-5 are produced with colorants which have different reflectance or transmission spectra at a broadband excitation of the electromagnetic radiation, for example with white light, which has a continuous spectrum in the range of about 400 nm to about 800 nm.
  • the individual pieces of information each have a homogeneous uniform color.
  • the colorants are chosen so that the reflectance or transmission spectra of the individual information portions 3-1, 3-2, 3-5 are each dominated by a distribution spectrum of a spectral color.
  • a spectral distribution of a spectral color has a significant intensity only in a narrowly limited wavelength range.
  • the first information portion 3-1 is formed, for example, with colorants which have a reflectance spectrum which is dominated by the spectral color blue, ie by intensity in the wavelength range of, for example, 440 nm.
  • the second information component 3-2 is configured, for example, with colorants whose reflectance spectrum is dominated by the spectral color red, for example at a wavelength of approximately 680 nm.
  • the further information portion 3-5 is formed, for example, by colorants whose reflectance spectrum is dominated by the spectral color yellow, for example in the wavelength range of about 570 nm.
  • the graphical information 3 is perceivable as one of the multiple pieces of information 3-1, 3-2, 3-5 existing graphics, which in a plane, ie Distance from the viewer, are arranged. If, however, the security element 2 is viewed with the aid of, for example, a large magnifying glass, ie a converging lens, which has a chromatic aberration, then the different information shares according to human perception are apparently arranged in different planes with respect to a viewing distance.
  • the first piece of information 3-1 which causes a blue color impression, is perceived as being closer to the viewer than the second piece of information 3-2, which causes a red color impression.
  • the further information portion 3-5 which causes a yellow color impression, is perceived in a plane in between. This means that the viewer has the first piece of information 3-1 as the foreground located, the second information portion 3-2 as in the background and perceives the further information portion 3-5 as located in the middle ground.
  • Fig. 1b Schematically represented are the eyes of the observer 11, who observe the security document 1 by an optical device 12 which influences a propagation direction of electromagnetic radiation, in particular of light, in the visible, infrared or ultraviolet wavelength range depending on the wavelength.
  • the optical device 12 may be formed, for example, as a converging lens, which shows a chromatic aberration. This means that a focal length of the condenser lens is different for the different spectral colors.
  • the different information components lying in an object plane are imaged differently on the retina of the eyes of the observer depending on the wavelength.
  • the perceived pieces of information 13-1, 13-2 and 13-5 are shown in phantom, as they are perceived in different levels by a viewer. Upwards, the perceived distance decreases from the viewer.
  • a verification device for an automated verification of a security element is shown with a 3D color effect.
  • the verification device 20 has a document receptacle 21 on which a document is placed during verification.
  • the document holder 21 is formed of a transparent at least in the visible wavelength range material, such as glass or Plexiglas.
  • the support can also be made of a quartz glass.
  • the verification device 21 further comprises an optical device 22, which influences a propagation direction of electromagnetic radiation as it passes through the wavelength.
  • the optical device can be constructed for example as a converging lens with chromatic aberration, but also as a prism or complex of different prisms.
  • optical gratings can be used as an optical device.
  • the verification device 20 additionally includes an excitation source 23 generating a white light spectrum. This generates a continuous or near-continuous emission spectrum whose light is perceived by a human observer to be white.
  • the verification device comprises an imaging Detection device 24, which detects spatially and spectrally resolved an image of the security element on the security document, while this is illuminated, for example, with electromagnetic radiation of the excitation source 23. Remitted radiation passes through the optical device 22 and is then detected by the detection device 24.
  • a CMOS chip of a color camera can be used as detection device 24. Depending on the wavelength of the individual information components, these are mapped differently on the detection device 24. This means that a position does not depend exclusively on the position of an information element in the plane of the security document, but additionally on its color. However, it is essential here that the reflectance spectrum or, as explained below, the transmission spectrum is dominated by a spectral color.
  • a reflectance spectrum is shown, which is dominated by a spectral color, for example the spectral color in the yellow wavelength range. It can be seen an intensity in a narrow wavelength range.
  • a comparable color impression is caused in a human observer by a remission spectrum, which is determined by a red and green spectral component, as in Fig. 3b is shown as an example.
  • An evaluation of the image acquired by means of the remission / transmission is carried out in an evaluation device 25, which is formed, for example, by means of a microprocessor which processes a program code stored in a memory.
  • the verification device alternatively or additionally to a further excitation source 26, which is for example also designed as a white light source that emits a continuous wavelength spectrum in the visible wavelength range. In this case, the transmission spectrum is evaluated.
  • the verification device to a UV light source 27.
  • the optical device 22, which influences the propagation of electromagnetic radiation as a function of wavelength, is coupled to an actuator 28 so that the device 22 can be removed from the beam path and moved back into the beam path in order to record reference images without a wavelength-dependent spatial propagation influence.
  • FIG. 4a is a schematic plan view of the visible at white light excitation information shares shown.
  • a first portion of information 3-1 is once again designed with colorants which exhibit a reflectance spectrum which is dominated by the spectral color blue.
  • the second information component 3-2 is formed by colorants which, when excited by white light, exhibit a reflectance spectrum which is dominated by a red spectral color.
  • Another portion of information 3-5 is formed, for example, by colorants, their reflectance spectrum by a green spectral color is dominated.
  • a third information component 3-3 is similar to the first information component 3-1 and a fourth information component 3-4 corresponds to the second information component 3-2.
  • Another portion of information 3-6 is similar to the wider information portion 3-5.
  • the third information part 3-3, the fourth information part 3-4 and the other information part 3-6 are coded with colorants which show no remission when excited by visible light. Upon excitation with UV light, however, they show a reflectance spectrum, which is dominated by a spectral color.
  • the third information component 3-3 is dominated by the spectral color red, the fourth information component 3-4 by the spectral color blue and the other information component 3-6 by the spectral color green.
  • the luminescence occurring in the case of UV light excitation is here also regarded as remission.
  • the coloring agents of the first information component 3-1, the second information component 3-2 and the further information component 3-5 are formed with colorants which show no remission upon excitation with UV light. When viewing the security element during UV light excitation, the viewer thus perceives the individual information portions in different levels.
  • the components of the third information component 3-3 which in terms of their geometric configuration are similar to those of the first information component 3-1, are perceived as being located in the background, whereas the fourth information component 3-4, which in its contour is similar to the second information component 3-2, to be perceived as being in the foreground.
  • the other information portion 3-6 with UV excitation as well as the further information portion 3-5 with white light excitation is perceived as in the middle ground.
  • a wavelength difference of the first spectral color and the second spectral color is different from a wavelength difference of the third spectral color and the fourth spectral color.
  • the sign changes.
  • the different contours thus seem to change their relative position with respect to a distance to the viewer when changing the excitation. This effect can be enhanced by For example, a size scaling of individual contours is additionally performed.
  • Fig. 5a and 5b The views of a security document are again shown schematically in white light excitation and UV light excitation. While the components of the third information component are smaller in terms of their areal extent relative to the components of the first information component, the fourth information component is enlarged in comparison to the second information component.
  • the wavelength for a contour from blue to red therefore, a reduction takes place and, in the case of a change from red to blue, a corresponding enlargement takes place.
  • the contour information does not change.
  • a further UV light source can be arranged adjacent to the further excitation source.
  • Combinations of incident light and manutichtbestrählung possible e.g. the change from white light to UV light can be accompanied by the change from an evaluation of the reflectance spectrum to an evaluation of the transmission spectrum.
  • a magnifying lamp is used for verification: this includes, for example, a converging lens with 3 diopters and a diameter of about 15 cm.
  • the condenser lens is enclosed in a housing.
  • a circularly formed converging lens almost completely enclosing light source, for example in the form of a fluorescent tube or an incandescent lamp arranged.
  • the housing is open to an object side, so that the security element to be verified is illuminated by means of the light source. to a viewing side, the light source is shielded by the housing.
  • a suitable distance for viewing and observing the 3D color effect there has been a lens-to-security distance of about 19.5 cm.
  • the magnifying glass can also be used for verification without the built-in light source.
  • Other embodiments additionally or alternatively include other light sources, for example IR or UV light sources, or a combination of different light sources that can individually or jointly illuminate the security element.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)

Claims (13)

  1. Elément de sécurité (2) pour un document de valeur et/ou de sécurité (1) servant à provoquer un effet chromatique 3D, comprenant une information graphique (3), qui comprend au moins une première partie d'information (3-1) et une deuxième partie d'information (3-2), sachant que la première et la deuxième partie d'information présentent, lors d'une excitation à large bande par un rayonnement électromagnétique, diverses répartitions spectrales dans le spectre de réflexion et/ou de transmission,
    caractérisé en ce que la première partie d'information (3-1) et la deuxième partie d'information (3-2) sont réalisées de telle manière que les spectres de réflexion et/ou de transmission de ces dernières sont dominés respectivement par une répartition spectrale d'une couleur spectrale.
  2. Elément de sécurité (2) selon la revendication 1, caractérisé en ce que la première partie d'information (3-1) et la deuxième partie d'information (3-2) sont codées au moyen de moyens de couleur, qui présentent respectivement un spectre de réflexion et/ou un spectre de transmission, qui est dominé, lors d'une excitation par une lumière visible blanche, par une répartition spectrale d'une couleur spectrale de la plage de longueurs d'ondes visibles, sachant que la première partie d'information (3-1) est dominée par une première couleur spectrale et que la deuxième partie d'information (3-2) est dominée par une deuxième couleur spectrale.
  3. Elément de sécurité (2) selon la revendication 1 ou 2, caractérisé en ce que l'information graphique (3) comprend au moins une troisième partie d'information (3-1) qui présente, lors d'une excitation par un rayonnement électromagnétique de la plage des longueurs d'ondes non visibles, un spectre de réflexion et/ou un spectre de transmission, qui est dominé par la répartition spectrale d'une troisième couleur spectrale.
  4. Elément de sécurité (2) selon la revendication 3, caractérisé en ce que l'information graphique (3) comprend en supplément une quatrième partie d'information (3-4), qui présente, lors de l'excitation par un rayonnement électromagnétique de la plage de longueurs d'ondes non visibles, un spectre de réflexion et/ou de transmission, qui est dominé par la répartition spectrale d'une quatrième couleur spectrale, et en ce que la première partie d'information(3-1) et la deuxième partie d'information (3-2) n'affichent, lors de l'excitation par un rayonnement électromagnétique de la plage de longueurs d'ondes non visibles, aucune ou quasiment aucune réflexion/transmission dans la plage de longueurs d'ondes visibles, et en ce que la troisième et la quatrième partie d'information n'affichent, lors de l'excitation par une lumière visible blanche, aucune ou quasiment aucune réflexion ou une réflexion blanche et/ou aucune ou quasiment aucune transmission ou une transmission blanche dans la plage de longueurs d'ondes visibles.
  5. Elément de sécurité (2) selon la revendication 3 ou 4, caractérisé en ce que la première partie d'information et la troisième partie d'information (3-3) comprennent la même information de contour, et en ce qu'une extension de la même information de contour dans la troisième partie d'information (3-3) présente une extension plus grande que dans la première partie d'information (3-1) dans la mesure où la troisième couleur spectrale est perçue comme se trouvant davantage au premier plan que la première couleur spectrale lors d'une observation par un système optique (22), qui influence une propagation d'un rayonnement électromagnétique en fonction de la longueur d'onde, et présente, dans le cas contraire, une extension plus petite dans la troisième partie d'information (3-3).
  6. Elément de sécurité (2) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les différentes parties d'information sont déposées selon une technique d'impression au moyen de moyens de couleur dans un plan.
  7. Procédé servant à vérifier un élément de sécurité (2) d'un document de valeur et/ou de sécurité (1), qui provoque un effet chromatique 3D, sachant que l'élément de sécurité comprend une information graphique (3), laquelle comprend au moins une première partie d'information (3-1) et une deuxième partie d'information (3-2), sachant que la première et la deuxième partie d'information présentent, lors d'une excitation à large bande par un rayonnement électromagnétique, diverses répartitions spectrales dans le spectre de réflexion et/ou de transmission,
    et sachant que la première partie d'information (3-1) et la deuxième partie d'information (3-2) sont réalisées de telle manière que les spectres de réflexion et/ou de transmission de ces dernières sont dominés respectivement par une répartition spectrale d'une couleur spectrale, sachant que le procédé comprend les étapes qui suivent consistant à :
    éclairer l'élément de sécurité (2) avec un rayonnement électromagnétique à large bande ;
    guider le rayonnement électromagnétique réfléchi et/ou transmis au niveau de l'élément de sécurité par au moins un système optique (22), qui influence, en fonction de la longueur d'onde, une propagation spatiale du rayonnement électromagnétique, en ce qu'une direction de propagation d'un rayonnement électromagnétique est influencée en fonction de la longueur d'onde lors du passage ;
    détecter et analyser une représentation graphique, à résolution de longueur d'onde de l'élément de sécurité (2).
  8. Procédé selon la revendication 7, caractérisé en ce que l'influence selon la longueur d'onde de la direction de propagation lors du passage est provoquée par le système optique (22) au moins au nombre de un au moyen d'une lentille présentant une aberration chromatique, au moyen d'un réseau ou au moyen d'un ou de plusieurs prismes.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que l'analyse comprend une comparaison des valeurs de couleur de plusieurs positions de la représentation détectée à des valeurs de couleur attendues pour lesdites positions.
  10. Procédé selon l'une quelconque des revendications 7 à 9, caractérisé en ce qu'une identification de contour à résolution spectrale est effectuée lors de l'analyse, et en ce que les contours déterminés, les positions des contours déterminés et les rapports d'intensité de ces dernières sont comparés, dans les divers canaux spectraux, à des contours, positions et rapports d'intensité attendus.
  11. Procédé selon l'une quelconque des revendications 7 à 10, caractérisé en ce qu'une représentation de référence de l'élément de sécurité présentant la même géométrie de représentation ou une géométrie de représentation comparable est détectée, sachant toutefois que le système optique (22) au moins au nombre de un n'est pas disposé dans la trajectoire des rayons, et en ce que les positions attendues des contours et/ou des rapports d'intensité des canaux spectraux du système de détection (24) et/ou les valeurs de couleur attendues sont calculés à l'aide de la représentation de référence et à l'aide d'une connaissance par l'intermédiaire du système optique au moins au nombre de un.
  12. Dispositif de vérification (20) pour un élément de sécurité (1) comprenant un effet chromatique 3D d'un document de valeur et/ou de sécurité, sachant que l'élément de sécurité comprend une information graphique (3), qui comprend au moins une première partie d'information (3-1) et une deuxième partie d'information (3-2), sachant que la première et la deuxième partie d'information présentent, lors d'une excitation à large bande par un rayonnement électromagnétique, diverses répartitions spectrales dans le spectre de réflexion et/ou de transmission,
    et sachant que la première partie d'information (3-1) et la deuxième partie d'information (3-2) sont réalisées de telle manière que les spectres de réflexion et/ou de transmission de ces dernières sont respectivement dominés par une répartition spectrale d'une couleur spectrale, sachant que le dispositif de vérification (20) comprend : une source de rayonnement électromagnétique à large bande servant à éclairer l'élément de sécurité, un système de détection (23) servant à détecter une représentation optique de l'élément de sécurité, sachant que le système de détection (23) est réalisé pour détecter de préférence de manière simultanée, avec une résolution locale plane, au moins deux canaux spectraux différents, et au moins un système optique (22), qui influence selon la longueur d'onde une propagation spatiale du rayonnement électromagnétique et qui est disposé ou peut être disposé de telle manière qu'un rayonnement électromagnétique réfléchi ou transmis par l'élément de sécurité (2) est guidé, lors de la détection de la représentation, par le système optique au moins au nombre de un, ainsi qu'un système d'analyse servant à analyser la représentation détectée,
    caractérisé en ce
    que le système optique (22) au moins au nombre de un influence selon la longueur d'onde une propagation spatiale du rayonnement électromagnétique en ce qu'une direction de propagation d'un rayonnement électromagnétique est influencée selon la longueur d'onde lors du passage.
  13. Dispositif de vérification (20) selon la revendication 12, caractérisé en ce que le système optique (22) au moins au nombre de un comprend une lentille présentant une aberration chromatique, un réseau ou un ou plusieurs prismes, afin de provoquer, lors du passage à travers le système optique (22) au moins au nombre de un, l'influence selon la longueur d'onde de la direction de propagation du rayonnement électromagnétique transmis ou réfléchi.
EP12709584.2A 2011-03-14 2012-03-12 Élément de sécurité doté d'un effet chromatique tridimensionnel et procédé de vérification et dispositif de vérification pour un tel élément de sécurité Active EP2686173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011005518A DE102011005518A1 (de) 2011-03-14 2011-03-14 Sicherheitselement mit einem 3D-Farbeffekt sowie Verifikationsverfahren und Verifikationsvorrichtung für ein solches Sicherheitselement
PCT/EP2012/054262 WO2012123407A1 (fr) 2011-03-14 2012-03-12 Élément de sécurité doté d'un effet chromatique tridimensionnel et procédé de vérification et dispositif de vérification pour un tel élément de sécurité

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EP2686173A1 EP2686173A1 (fr) 2014-01-22
EP2686173B1 true EP2686173B1 (fr) 2015-07-15

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DE102013218754B4 (de) * 2013-09-18 2019-05-09 Bundesdruckerei Gmbh Manipulationsabgesichertes Wert- oder Sicherheitsprodukt und Verfahren zum Verifizieren der Echtheit des manipulationsabgesicherten Wert- oder Sicherheitsproduktes
DE102015106081A1 (de) 2015-04-21 2016-10-27 Friedrich Kisters Verfahren zur Identifikation eines Sicherheitsmusters über eine artifizielle 3-D-Rekonstruktion
KR102549881B1 (ko) 2016-12-16 2023-06-30 오우브이디이 키네그램 악티엔개젤샤프트 보안 다큐먼트의 검증

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US5877895A (en) * 1995-03-20 1999-03-02 Catalina Coatings, Inc. Multicolor interference coating
EP1189079B1 (fr) * 1999-05-24 2010-10-06 Toppan Printing Co., Ltd. Corps composite stratifie, support d'enregistrement d'informations et element permettant d'attribuer une fonction de prevention des contrefa ons
DE10206357A1 (de) * 2002-02-14 2003-08-28 Giesecke & Devrient Gmbh Sicherheitselement und Sicherheitsdokument mit einem solchen Sicherheitselement
WO2004089640A2 (fr) * 2003-04-04 2004-10-21 Angstrom Technologies, Inc. Procedes et compositions d'encre pour images de securite a impression invisible pourvues de multiples caracteristiques d'authentification
DE502005005905D1 (de) * 2005-10-26 2008-12-18 Alcan Tech & Man Ltd Gegenstand mit einem aufgedruckten Bild
US8283004B2 (en) * 2006-05-11 2012-10-09 Xerox Corporation Substrate fluorescence pattern mask for embedding information in printed documents
DE102009024447A1 (de) 2009-06-10 2010-12-16 Giesecke & Devrient Gmbh Sicherheitselement mit veränderbarem optischen Erscheinungsbild

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DE102011005518A1 (de) 2012-09-20
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