EP2409849A1 - Combinaison d'une substance luminescente et d'un hologramme - Google Patents

Combinaison d'une substance luminescente et d'un hologramme Download PDF

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Publication number
EP2409849A1
EP2409849A1 EP10170447A EP10170447A EP2409849A1 EP 2409849 A1 EP2409849 A1 EP 2409849A1 EP 10170447 A EP10170447 A EP 10170447A EP 10170447 A EP10170447 A EP 10170447A EP 2409849 A1 EP2409849 A1 EP 2409849A1
Authority
EP
European Patent Office
Prior art keywords
luminescent substance
radiation
volume hologram
oxide
radiation source
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.)
Withdrawn
Application number
EP10170447A
Other languages
German (de)
English (en)
Inventor
Dieter Ebert
Stefan Perlot
Erich Höpoldseder
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.)
Sony DADC Europe Limited Austria Branch
Swiss Authentication Research and Development AG
Swiss Authentication Res and Dev AG
Original Assignee
Sony DADC Austria AG
Swiss Authentication Research and Development AG
Swiss Authentication Res and Dev AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony DADC Austria AG, Swiss Authentication Research and Development AG, Swiss Authentication Res and Dev AG filed Critical Sony DADC Austria AG
Priority to EP10170447A priority Critical patent/EP2409849A1/fr
Priority to PCT/EP2011/062552 priority patent/WO2012010665A2/fr
Publication of EP2409849A1 publication Critical patent/EP2409849A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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
    • G07D7/0032—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 using holograms
    • 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

Definitions

  • the invention relates to a composition for marking articles comprising a luminescent substance based on oxides, oxide sulfides and / or oxide fluorides of lanthanide ions and a holographic support for recording or reconstruction of a volume hologram.
  • the luminescent substance has a characteristic emission spectrum and can be used in combination with the volume hologram for authentication and / or identification of products such as substances or mixtures of substances.
  • a subject of the invention is a composition for marking articles, comprising (i) a luminescent substance comprising (a) an IR-stimulable component comprising at least one oxide, oxide sulfide or oxide fluoride of lanthanide ions, and (b) optionally one by UV Radiation excitable component and (ii) a holographic support for recording or reconstruction of a volume hologram.
  • a luminescent substance comprising (a) an IR-stimulable component comprising at least one oxide, oxide sulfide or oxide fluoride of lanthanide ions, and (b) optionally one by UV Radiation excitable component and (ii) a holographic support for recording or reconstruction of a volume hologram.
  • the possibilities for marking objects e.g. Construction or spare parts of electronic equipment, machinery, vehicles, aircraft, etc., packaging or containers, e.g. of pharmaceutical products, fashion items, documents, banknotes, etc. significantly improved.
  • the possibility of information storage is also significantly increased.
  • the composition according to the invention can be used to label Products in different ways.
  • the luminescent substance can be introduced into the holographic carrier, it being possible for particles of the luminescent substance to be dispersed in the entire region of the carrier, in a part thereof or in individual layers thereof.
  • the luminescent substance can also be arranged as a layer on one or both surfaces of the carrier.
  • the luminescent substance is present separately from the carrier, so that luminescent substance and holographic carrier can be present in or on different regions of the product to be marked, wherein these two regions can be adjacent or separate from one another.
  • Component (i) of the composition is a luminescent substance comprising (a) an IR-stimulable component comprising at least one oxide, oxide sulfide or oxide fluoride of lanthanide ions, and (b) optionally a UV-excitable component.
  • Lanthanoid compounds for use as anti-Stokes luminescent substances are, for example, in WO 00/60527 .
  • WO 2008/000461 as well as in the U.S. Patents 6,802,992 and 6 686 074 described, the contents of which are hereby incorporated by reference.
  • These lanthanoid oxide sulfides can be used to label substances or mixtures of substances.
  • Component (i) is an IR-radiation excitable component comprising an oxide, oxide sulfide or oxide fluoride of lanthanide ions.
  • Component (b) is a UV-activatable component, which is conveniently an inorganic compound inert under ambient conditions, for example an optionally doped aluminate, which absorbs in the UV wavelength range and is characteristic of the compound Luminescence radiation, eg fluorescence radiation, emitted.
  • Such compositions are the subject of the German patent application DE 10 2010 028 818.7 , the contents of which are expressly referred to.
  • Component (a) is preferably a luminescent substance with "upconverter” and / or “anti-Stokes” properties.
  • component (a) comprises an oxide, oxide or oxyfluoride of yttrium and an oxide, oxide or oxide fluoride of at least one, at least two or at least three further elements selected from lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium , Dysprosium, holmium, erbium, thulium, ytterbium and lutetium, and optionally at least one dopant selected from oxides and / or fluorides of main or subgroup elements.
  • component (a) is a luminescent substance as in WO 2008/000461 described.
  • the oxide, oxide sulfide or oxide fluoride of yttrium is preferably present in a proportion of ⁇ 85 mol% ⁇ 90 mol%, ⁇ 92 mol%, ⁇ 94 mol% or ⁇ 96 mol% , Further oxides, oxide sulfides or oxide fluorides are preferably present in a proportion of in each case up to 5 mol%, up to 3.5 mol% or up to 2 mol% based on the entire component (a).
  • the further oxides, oxide sulfides or oxide fluorides are preferably selected from the oxides, oxide sulfides or oxide fluorides of erbium, ytterbium and of at least one further element, in particular of lutetium, gadolinium, holmium, thulium, dysprosium and / or europium.
  • the oxides, oxide sulfides or oxide fluorides of erbium and ytterbium are preferably present in a proportion of 0.5-2 mol%, particularly preferably 1-2 mol% based on the total component (a).
  • the further oxides, oxide sulfides or oxide fluorides are preferably used in minor proportions of, for example, 0.1-1 mol%, particularly preferably 0.1-0.5 mol%, based on the total component (a).
  • component (a) of the luminescent substance besides the oxide, oxide sulfide or oxide fluoride of yttrium may contain oxides, oxide sulfides or oxide fluorides of 1, 2, 3, 4, 5, 6, 7 or even more other elements.
  • Component (a) of the luminescent substance additionally additionally contains at least one dopant selected from oxides and / or fluorides of main or subgroup elements.
  • the dopants are preferably present in a proportion of up to 5 mol%, more preferably of up to 2 mol%, even more preferably of up to 1 mol%, even more preferably of 0.05-1 mol% and most preferably from 0.1 to 0.2 mol% based on the entire component (a).
  • a preferred dopant is a fluoride which may be exemplified by an alkaline earth metal fluoride or alkali metal fluoride, e.g. as potassium fluoride, can be used.
  • the fluoride is preferably present in a proportion of 0.1-0.2 mol% based on the entire component (a).
  • dopants are alkaline earth metals and / or subgroup elements which are in the form of cations which are twice or more positively charged, preferably in the form of oxides and / or fluorides.
  • Particularly preferred dopants are calcium, zinc and / or titanium, for example in the form of the oxides calcium oxide, zinc oxide or titanium dioxide.
  • the cationic dopants are preferably present in a proportion of 0.1-0.2 mol%, based on the total component (a).
  • the IR-excitable component (a) of the luminescent substance (i) is characterized on the one hand by a high luminescence intensity and on the other hand by emission lines or peaks which are characteristic of the presence and the proportions of the individual fractions.
  • Component (a) of the luminescent substance (i) can, as in WO 2008/000461 described produced.
  • dopants for example of polyvalent cations and / or fluoride, causes drastic changes in the position and / or intensity of individual emission wavelengths. Furthermore, a strong increase in the total luminescence intensity is also found. It is believed that in addition to the two-photon absorption known in anti-Stokes materials, three-photon absorption also takes place.
  • Component (b) of the luminescent substance (i) is a component which can be excited by UV radiation and emits a characteristic luminescence radiation after excitation. It is preferably an aluminate which is optionally doped with transition metal and / or lanthanide ions.
  • Component (b) preferably contains an aluminate of alkaline earth metal ions, transition metal ions and / or lanthanide ions, preferably an aluminate of barium or magnesium or an aluminate of yttrium, optionally doped with Eu, Mn, Th and / or Cr ions.
  • the location and / or intensity of the emission wavelengths can be varied.
  • the UV sensitivity is increased.
  • the dopant of component (b) is favorably present in a proportion of up to 10 mol%, up to 5 mol% or up to 1 mol% based on the entire component (b).
  • the component (b) is favorably present in a total proportion of 1-30%, 5-20% or 8-12% based on the total weight of the components (a) and (b).
  • the components (a) and / or (b) are present in the luminescent substance (i), preferably in crystalline form. Furthermore, it is preferred that the individual components consist of a single phase, for example a crystalline phase, which can be determined by X-ray diffractometric methods.
  • the component (a) is particularly preferably in hexagonal crystalline form. If appropriate, the individual components (a) and / or (b) may also each consist of a mixture of a plurality of luminescent substances.
  • the luminescent substance is usually present in the form of particles, the mean particle size being ⁇ 5 nm, in particular ⁇ 1 nm.
  • the particle size is preferably in the range of 10 nm-100 ⁇ m, preferably 50 nm-50 ⁇ m, and particularly preferably about 100 nm-10 ⁇ m.
  • the components (a) and (b) are preferably present in the luminescent substance (i) in a substantially homogeneous distribution, e.g. as a homogeneous distribution of particles, in particular of crystalline particles as described above before.
  • This homogeneous distribution can be achieved by co-grinding the components in conventional milling equipment, e.g. Ball mills, can be achieved.
  • Component (ii) of the agent according to the invention is a carrier for receiving or reconstructing a volume hologram.
  • the carrier is a common carrier for volume holograms, eg a holographic film.
  • the carrier may be a transparent or opaque carrier.
  • the support may be of any size, eg from 1 mm 2 to 10 cm 2 . A usual size is about 15 x 20 mm.
  • the shape of the carrier can be arbitrary, for example, round, rectangular, oval or irregular.
  • the hologram may be a transmission or reflection (transmitted light) hologram. Specific types of holograms are Denisjuk holograms, RGB holograms, rainbow holograms, and computer-generated or digital holograms.
  • the hologram contains stored data, information or interference patterns, for example in the form of one-dimensional or multidimensional barcodes, images, alphanumeric Characters, digital data bits or combinations thereof. The data may be stored in visible or invisible form.
  • volume holograms The recording of volume holograms is performed by irradiating a photosensitive composition with coherent light at a reference wavelength or a reference wavelength combination.
  • the reference wavelength is, for example, in the range of 100-1000 nm.
  • Preferred materials for generating volume holograms are photosensitive compositions comprising polymerizable materials.
  • the hologram can be recorded by an individualized irradiation, so that each individual hologram contains individual information.
  • Preferred photosensitive compositions are in US 5,453,340 described, the disclosure of which is incorporated herein by reference.
  • the photosensitive composition comprises (ii): (a) one or more radical polymerizable compounds, (b) one or more radical polymerization initiators, (c) one or more cationically polymerizable compounds other than (a), (d) one or several initiators for a cationic polymerization and (e) optionally further components.
  • Suitable radically polymerizable compounds (a) are acrylic-based monomers, styrene-based monomers and / or vinyl-based monomers. Specific monomers are acrylamide, methacrylamide, phenyl acrylate, 2-phenoxyethyl acrylate, (acryloxyethyl) naphthalenedicarboxylate monoester, methylphenoxyethyl acrylate, nonylphenoxyethyl acrylate, ⁇ -acryloxyetyl hydrogenphthalate, phenoxypolyethylene glycol acrylate, 2,4,6-tribromophenyl acrylate, (2-methacryloxyethyl) diphenate monoester, benzyl acrylate, 2 , 3-Dibromophenyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-naphthyl acrylate, N-vinylcarbazole, 2- (9-carbazole) ethyl acrylate, triphen
  • any radical-generating substances such as organic dyes with polymer salts, eg, cyanines or salts of diphenyliodonium and diaryliodonium, can be used.
  • organic dyes with polymer salts eg, cyanines or salts of diphenyliodonium and diaryliodonium
  • cyanines or salts of diphenyliodonium and diaryliodonium can be used.
  • Specific examples are anhydro-3,3'-dicarboxymethyl-9-ethyl-2,2'-thiacarbocyanine betaine, anhydro-3-carboxymethyl-3 ', 9-diethyl-2,2'-thiacarbocyanine betaine, 3,3', 9- Triethyl 2,2'-thiacarbocyanine iodide, 3,9-diethyl-3'-carboxymethyl-2,2'-thiacarbocyanine iodide and 3,3 ', 9-trieth
  • Component (c) of the photosensitive composition (ii) is one or more cationically polymerizable compounds.
  • examples are glycidyl-based compounds, epoxides or vinyl-based compounds.
  • Specific monomers are Diglycerolpolyglycidylether, pentaerythritol polyglycidyl ether, 1,4-bis (2,3-epoxypropoxyperfluorisopropyl) cyclohexane, sorbitol polyglycidyl ether, trimethylolpropane polyglycidyl ether, resorcinol diglycidyl ether, 1,6-hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, phenyl glycidyl ether, pt-Butylphenyldiglycidylether, diglycidyl adipate, diglycidyl o-phthalate, dibromophenyl
  • Component (d) of the photosensitive composition (ii) is an initiator of cationic polymerization.
  • compounds which produce Br Zernstedt or Lewis acids after decomposition for example Diaryliodoniumsalze, Triarylsulfonsalze, Eisenallensalze and the like.
  • diaryliodonium salts are tetrafluoroborates, hexafluorophosphates, Hexafluoroarsenates and hexafluoroantimonates of iodonium compounds.
  • triarylsulfone salts are tetrafluoroborates, hexafluorophosphates, hexafluoroarsenates and hexafluoroantimonates of sulfonium or triphenylsulfonium compounds such as 4-tert-butyltriphenylsulfonium, tris (4-methylphenyl) sulfonium, tris (4-methoxyphenyl) sulfonium, 4-thiophenyltriphenylsulfonium. Combinations of several of the compounds mentioned are suitable.
  • the photosensitive composition may optionally contain organic solvents, e.g. Ketones, esters, ethers, dioxanes, hydrocarbons such as cyclohexane, halogenated hydrocarbons, aromatics, alcohols or mixtures of one or more such solvents.
  • organic solvents e.g. Ketones, esters, ethers, dioxanes, hydrocarbons such as cyclohexane, halogenated hydrocarbons, aromatics, alcohols or mixtures of one or more such solvents.
  • Solventless photopolymer compositions can also be used.
  • Further possible additives are binders, thermopolymerization inhibitors, silane coupling agents, plasticizers, dyes and / or copolymers.
  • the recording and reconstruction of a volume hologram from a photosensitive composition can be carried out by known methods using coherent light radiation, eg laser light, such as in US 5,453,340 described, done. Other methods for producing holograms are in US 2009/286165 A described. The disclosure of this document is expressly incorporated by reference.
  • the combination of luminescent substance and holographic support can be used for authentication or identification, for example as security marking of objects, eg substances or mixtures of substances. In this way, the authenticity of products or documents can be determined.
  • the holographic support is usually mounted on a surface of the object to be marked. This can be done, for example, by using adhesive material. Alternatively, however, the holographic support can also be incorporated into the surface of the article to be coated.
  • the Luminescent substance can be introduced into the carrier and / or be present as a layer on the upper and / or lower surface of the carrier, for example in an adhesive material used for binding the carrier to the article.
  • the luminescent substance can also be applied separately from the carrier in or on the object. In this case, the luminescent substance and the carrier may be present side by side, for example in adjoining relation, or on different, spatially separated regions of the article.
  • the data or information present in the luminescent substance and in the hologram can be correlated with one another.
  • the data may also be associated with an external data carrier, e.g. an optical disc, a FLASH memory or an RFID.
  • the luminescent substance can be introduced into or applied to any solid and / or liquid substances or substance mixtures.
  • the luminescent substance can be applied to carrier substances, such as paints, toners, inks, paints, etc., or into products, such as plastics, metals, glass, silicones, paper, rubber, medicaments, etc.
  • carriers substances such as paints, toners, inks, paints, etc.
  • products such as plastics, metals, glass, silicones, paper, rubber, medicaments, etc.
  • objects can be provided with a coating of the luminescent substance on its surface or parts thereof which have a layer thickness of, for example, 1-10 ⁇ m, preferably 1-5 ⁇ m.
  • the luminescent substance is added to the product or a portion of the product in an amount of 20-2000 ppm, preferably 50-200 ppm.
  • the luminescent substance according to the invention is suitable for use in biological systems, eg cell cultures, samples from body fluids or tissue sections or as a contrast agent.
  • the luminescent substance can be coupled in nano- or microparticulate form to biological detection reagents.
  • the surfaces of particles of the luminescent substance may be modified with deodetomines or other adhesive substances to provide the suspending properties, for example, in organic liquids such as oils, gasolines, liquefied gases etc., in aqueous fluids such as body fluids, in aqueous-organic fluid systems and flowable powders such as toners.
  • the smaller the particles the lower their tendency to sedimentation.
  • intensive grinding for example, the particle size can be reduced so far, for example to ⁇ 100 nm, that a stable suspension of the particles in liquids is achieved even without the addition of adhesive substances.
  • An anti-counterfeiting of the marking is given by the fact that the emission lines characteristic of the respective luminescent substance represent a cryptographic key which can be compared to a detector adapted to the respective substance, i. the castle can be detected.
  • the combination of the holographic support with the luminescent substance represents a further significant improvement in the anti-counterfeiting security of the marking.
  • the luminescent substance preferably contains two components which can be excited to luminescence by radiation in different wavelength ranges.
  • component (a) can be excited to luminescence with IR radiation in the range of 850-1500 nm, in particular of 920-1000 nm, and / or component (b) with UV radiation in the range of 350-420 nm, especially from 380-410 nm, are excited to luminescence.
  • the presence of the luminescent substance in an article is detected by irradiation with two wavelengths.
  • a first wavelength in the infrared range in particular with IR monochromatic laser light or with an IR light emitting diode with wavelengths between about 850 nm and 1500 nm, preferably between about 920 nm and 1000 nm, more preferably between about 950 nm and 1000 nm, most preferably between 920 nm and 985 nm, wherein component (a) is excited and the resulting emission radiation approximately in the range between 300 nm and 1700 nm, in particular between 350 nm and 1000 nm is detected.
  • the irradiation of component (a) is preferably carried out with a power of 1-200 mW, in particular 10-80 mW.
  • a second wavelength in the UV range in particular with UV monochromatic laser light or with a UV light emitting diode with wavelengths between about 350 nm and 450 nm, preferably between about 380 nm and 400 nm is used, wherein the Component (b) excited and the emission radiation by eg Fluorescence is detected in the range between 300 nm and 1700 nm, in particular between 350 nm and 1000 nm.
  • the irradiation of component (b) is preferably carried out with a power of 2-50 mW, in particular 5-30 mW.
  • the components (a) and (b) of the luminescent substance are separately excited to luminescence by irradiation with a wavelength in the IR range and by irradiation with a wavelength in the UV range, and the emission radiation of components (a) and ( b) is detected separately.
  • the excitation of component (a) and component (b) may be sequential, i. take place at different times, preferably first the component (a) and then the component (b) is excited.
  • the reconstruction of the image produced by the holographic support may be carried out in a conventional manner by irradiation e.g. with a wavelength identical to the reference wave used to record the hologram.
  • This wavelength can be in the range between 100-1000 nm and especially between 220-600 nm, e.g. at 266 nm, 405 nm or 530 nm.
  • the wavelength may be identical to or different from a wavelength used to excite the luminescent substance.
  • the Emission radiation of the luminescent substance are detected digitally together with the signal derived from the holographic carrier.
  • digitized signals of the components (a) and (b) of the luminescent substance and of the hologram originating signals or parts of these signals (eg signals of individual peaks) can be converted by cryptographic measures using appropriate algorithms into a new signal.
  • the data density can be increased by a factor of up to about 10 6 or more.
  • the radiation sources are preferably each laser.
  • the readout system preferably further contains a contact sensor, for example an optical contact sensor, which controls the radiation sources, so that activation of the radiation source takes place only when the readout system contacts a sample to be determined.
  • a contact sensor for example an optical contact sensor, which controls the radiation sources, so that activation of the radiation source takes place only when the readout system contacts a sample to be determined.
  • the irradiation of the product containing the luminescent substance by the readout system can be carried out directly with an optical waveguide or another optically relevant transfer medium, eg a solid optical body, a fluid, gas, etc.
  • the detection can be done visually or by means of detectors.
  • optical waveguides whose heads are ground as a converging lens, so that incident light (IR or UV light) and light emitted by the luminescent substance (specific emission spectrum) form a unit and can be focused at the same point.
  • incident light IR or UV light
  • light emitted by the luminescent substance specifically emission spectrum
  • An advantage of this is that no mechanical misalignment between receiver and transmitter can take place.
  • the attenuation factor of the optical fiber e.g. made of glass or plastic, may vary, the transition from the optical components (radiation source or detection element) to the optical waveguide being mounted with little covision.
  • the length of the optical fiber may vary and is typically between 1 cm and 50 cm.
  • the readout system further includes one or more optical detection elements which are used for the selective detection of the authenticity of the luminescent substance, e.g. in terms of wavelength and / or intensity, and the hologram are provided.
  • the detection elements may be, for example, diodes, photoelements or electronic detectors.
  • detector matrices are used with a plurality of detectors preferably set differently, e.g. Diodes, photoelements or CCD matrices.
  • the detectors of the detector array may be equipped with a spectrometer and / or optical filters, e.g. Bandpass filters, combined.
  • the readout system may also include a programmable electronic unit that enables digital evaluation and conditioning of the measurement signal.
  • the readout system of the present invention is desirably used in conjunction with a combination of luminescent composition and volume hologram as previously described.
  • step (b) first the irradiation in the IR range and then the irradiation in the UV range.
  • step (d) comprises digital processing of the measurement signal or parts thereof.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Holo Graphy (AREA)
  • Credit Cards Or The Like (AREA)
EP10170447A 2010-07-22 2010-07-22 Combinaison d'une substance luminescente et d'un hologramme Withdrawn EP2409849A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10170447A EP2409849A1 (fr) 2010-07-22 2010-07-22 Combinaison d'une substance luminescente et d'un hologramme
PCT/EP2011/062552 WO2012010665A2 (fr) 2010-07-22 2011-07-21 Combinaison d'une matière luminescente et d'un hologramme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10170447A EP2409849A1 (fr) 2010-07-22 2010-07-22 Combinaison d'une substance luminescente et d'un hologramme

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105667111A (zh) * 2016-01-21 2016-06-15 张利平 一种可变化图案与文字的包装盒应用方法
DE102017103780A1 (de) 2017-02-23 2018-08-23 Tailorlux Gmbh Verfahren zur Identifizierung eines Materials bzw. Materialgemisches

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5453340A (en) 1991-04-17 1995-09-26 Nippon Paint Company, Ltd. Photosensitive composition for volume hologram recording
WO1999046133A1 (fr) * 1998-03-10 1999-09-16 De La Rue International Limited Procede de fabrication d'un article de securite
WO2000060527A1 (fr) 1999-04-07 2000-10-12 Sicpa Holding S.A. Procede et dispositif d'excitation d'un materiau luminescent
US6686074B2 (en) 2001-03-16 2004-02-03 Bundesdruckerei Gmbh Secured documents identified with anti-stokes fluorescent compositions
US20040099740A1 (en) * 2002-11-25 2004-05-27 Chresand Thomas J. Merchandising components for authenticating products, and combinations and methods utilizing the same
US6802992B1 (en) 1997-03-05 2004-10-12 Wieczoreck Juergen Non-green anti-stokes luminescent substance
WO2004102490A1 (fr) * 2003-05-19 2004-11-25 Bundesdruckerei Gmbh Detecteur servant a reconnaitre l'authenticite d'un element de securite luminescent d'un document de valeur, document de valeur et procede pour la production de ce dernier
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