EP2613947A1 - Object which can be authenticated and which contains a cover masking an authenticating pattern - Google Patents
Object which can be authenticated and which contains a cover masking an authenticating patternInfo
- Publication number
- EP2613947A1 EP2613947A1 EP11728838.1A EP11728838A EP2613947A1 EP 2613947 A1 EP2613947 A1 EP 2613947A1 EP 11728838 A EP11728838 A EP 11728838A EP 2613947 A1 EP2613947 A1 EP 2613947A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cache
- pattern
- authenticating
- substrate
- masking layer
- 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- Withdrawn
Links
Classifications
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- 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
- B42D25/364—Liquid crystals
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- 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
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- 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
- B42D25/369—Magnetised or magnetisable materials
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- B42D2033/16—
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- B42D2033/26—
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- B42D2035/34—
Definitions
- the present invention relates to an authenticatable object including a cache for masking and revealing an authenticating pattern.
- the field of use of the present invention relates in particular to the fight against counterfeiting of documents or protected products.
- US 6,061,122 discloses a system whose authenticity is determined by recognition of the optical properties of cholesteric liquid crystals used in its manufacture. These liquid crystals can reflect light at certain wavelengths and thus allow the formation of holographic type images difficult to reproduce.
- US 2003/0173539 discloses a marking, comprising liquid crystals, invisible to the eye but can be detected using a detection apparatus such as a polarizer or a color filter.
- US 6,580,481 discloses a device with visible inscriptions and invisible inscriptions. Invisible inscriptions are recorded on a magnetic layer on which the information is recordable only once or in the memory of an integrated circuit in which the information can be recorded and erased. A detection device makes the inscriptions invisible visible. These devices therefore require special equipment to recover or reveal hidden information or information not hidden but difficult to reproduce.
- the detection device then reads the markers after deactivating the locking system concealing said markers.
- document US 2006/0126001 discloses a device in which an anti-counterfeiting pattern to be detected is incorporated into a material.
- This device has two distinct states, one allowing concealment of the anti-counterfeiting pattern and the other allowing its detection. It is therefore a first step, to make the material "transparent" to the detection light, before performing the actual reading of the pattern. While remaining difficult to duplicate, the anti-counterfeiting pattern of this device is made visible to the human eye without the need for specialized detection devices.
- the material has two stable states, it also contains the anti-counterfeiting pattern. It is also important to note that this device may pose compatibility problems between the materials constituting the pattern and those constituting the cache.
- WO 82/02445 discloses an identifiable article comprising a distinctive element such as a photograph.
- a mask usually opaque, permanently covers the distinctive element. This mask is made of material capable of passing from an opaque state to a transparent state under the effect of an electric field. The passage of the mask to the transparent state thus allows the revelation of the distinctive element (photography).
- US 2008/198278 discloses an object comprising a layer having an optical effect and can be masked by an opaque upper layer in the absence of electric current.
- This opaque upper layer may consist of liquid crystals or a photochromic material. It is made transparent by application of an electric current.
- the present invention relates to an object that can be authenticated, comprising an authentication pattern that is not apparent under normal conditions of use.
- the Applicant has developed an authenticatable object including a cache for concealing or hiding an authenticating pattern embedded in the substrate.
- a detection device deactivates this cache in order to be able to detect the authentication pattern, thus making it possible to distinguish the authenticated object from any counterfeit.
- the present invention relates to an authenticatable object comprising a substrate, said substrate containing at least one authentication or identification pattern.
- the pattern is covered with a cache for hiding and revealing, the cache being capable of undergoing a physical or structural transformation capable of allowing the revelation of said pattern.
- the authenticating pattern is fluorescent and comprises fluorescent organic particles and / or fluorescent inorganic particles incorporated into the substrate of the object that can be authenticated.
- the substrate of the authenticatable object according to the present invention is generally made of paper, fabric, polymer, glass, or metal.
- the fluorescence of the authenticating pattern is ensured by the presence of fluorochromes or fluorophores, that is to say a chemical substance capable of emitting fluorescence light after excitation.
- Inorganic fluorophores are generally unalterable over time and insensitive to different chemistries, thus facilitating their incorporation.
- they may advantageously be chosen from the group comprising quantum dots, fluorite minerals such as adamite, hemimorphite or calcite.
- the organic fluorophores are alterable in time and sensitive to the different chemistries of incorporation.
- they may advantageously be chosen from the group comprising the cyanine family such as Cy5, Cy3, or Alexa Fluor®.
- Organic fluorophores have the advantage of being excitable at a single wavelength unlike inorganic fluorophores, which have a broader absorption spectrum.
- organic fluorophores can be implemented for point-in-time use, since they are alterable when not encapsulated. Those skilled in the art will be able to choose the organic and / or inorganic fluorophores adapted according to the authenticating pattern.
- the authenticating pattern comprises fluorophores whose density is sufficient to allow the detection of the signal.
- fluorophores whose density is sufficient to allow the detection of the signal.
- the substrate itself may be fluorescent and therefore does not require the incorporation of fluorescent particles.
- the cache of this authenticatable object comprises two possible stable states in which the authenticating pattern is either (1) masked, or (2) readable, and at least revealable, for example by excitation.
- the present invention comprises four main particular embodiments in which the cache comprises a masking layer that can be:
- a photochromic material that is to say a material capable of changing color under the effect of an external field. It is a material that is opaque to the detection light of the authenticating pattern; it becomes transparent under the effect of an external field.
- a phototochrome substance has a different color depending on the intensity of the field to which it is exposed.
- a material able to deform physically under the action of an external field is comparable to a deformable blade under the action of an external field; a material comprising liquid crystals, passing from an opaque to transparent state under the effect of an external field;
- a material comprising magnetic particles that disperse or cluster under the action of a magnetic field.
- the thickness of the cache is between 1 and 500 micrometers, so as to mask the authenticating pattern while allowing a fast and abrupt transition from the masked state to the readable state and vice versa.
- the secrecy of the cache is also assured.
- the cache masking the authenticating pattern is arranged to cover at least the area of the substrate comprising the authenticating pattern.
- the cache must be "open" for the detection light to access the authentication pattern.
- the masking layer is either transparent or physically deformed.
- the external field may be an electric current, an electric field and / or a magnetic field.
- photochromes are sensitive to light (electromagnetic field) while some polymers are sensitive to electric current (structure or conformation modification).
- liquid crystals are sensitive to the electric field and mixtures comprising magnetic particles are sensitive to the magnetic field.
- the masking layer covering the authenticating pattern of the authenticatable object according to the invention comprises in particular at least one material advantageously chosen from the group comprising:
- an electrochromic system ITO / WO 3 / electrolyte / Ir0 2 / ITO In 2 O 3 / SnO 2
- said electrolyte may be a proton-conductive anhydrous polymer obtained by dissolving orthophosphoric acid in a polymer, preferably branched polyethyleneimine (BPEI); polymeric actuators operating in the open air, preferably based on polyoxyethylene (POE) and PEDOT (poly (3,4-ethylenedioxythiophene) in the case where the masking layer comprises a physically deformable material under the effect of an external field;
- 70CB heptyloxycyanobiphenyl
- MBBA N- (4-methoxybenzylidene) -4-butylaniline
- PAA para-azoxyanisole
- silver metallogen in the case where the masking layer comprises liquid crystals
- US 2006/0126001 discloses a hiding screen.
- This device can thus present problems related to the chemical incompatibility between the materials constituting the authenticating pattern and those constituting the cache, since the screen contains the "authenticating" image.
- the authenticatable object according to the present invention does not have such problems.
- a cache masks the authenticating pattern. The cache must be activated to reveal the area containing the authentication pattern. A (excitation) light signal is then required to activate the signature (emission wavelengths) specific for the fluorophores or the combination of fluorophores present.
- the cache of the authenticated object according to the invention comprises:
- a first layer of transparent conductive material deposited on at least the area of the substrate comprising the authenticating pattern
- a masking layer, of photochromic material deposited on at least a portion of the layer of transparent conductive material, so as to cover at least the area of the substrate comprising the authenticating pattern;
- the cache of the object that can be authenticated according to the invention comprises:
- a transparent release layer deposited on at least the area of the substrate comprising the authenticating pattern
- a first layer of transparent conductive material deposited on at least the area of the transparent release layer covering the area of the substrate comprising the authenticating pattern
- a masking layer of physically deformable material under the effect of an external field, deposited on the layer of transparent conductive material, so as to cover the area of the substrate comprising the authenticating pattern;
- a second layer of transparent conductive material deposited on at least a portion of the masking layer, and not in contact with the first layer of transparent conductive material.
- the transparent conductive layers located on either side of the masking layer, are connected to electrical contacts. These electrical contacts, advantageously made of metal or of conductive material, form the electrodes.
- the transparent conductive layers are made of ITO (In 2 O 3 / SnO 2 ), or PEDOT (poly (3,4-ethylenedioxythiophene).
- the cache of the object that can be authenticated according to the invention comprises:
- a vertical polarization filter deposited on at least the area of the substrate comprising the authenticating pattern
- the electrodes may be IZO (In 2 03 / ZnO) or ITO (In 2 0 3 / Sn0 2);
- liquid crystals deposited on the glass with electrodes so as to cover at least the area of the substrate comprising the authenticating pattern
- the cache according to the third particular embodiment is similar to a liquid crystal display.
- the detector must, simultaneously:
- the present invention also relates to manufacturing processes associated with the four particular embodiments described above.
- the manufacturing process comprises the following steps:
- a masking layer made of photochromic material on at least a portion of the layer of transparent conductive material, so as to cover at least the area of the substrate comprising the authenticating pattern;
- the manufacturing method according to the second particular embodiment of an authenticatable object whose cache comprises a masking layer made of material capable of undergoing deformation under the effect of an external field, and a fluorescent authenticating pattern, comprises the following steps :
- the method of manufacture according to the third particular embodiment of an authenticatable object in which the cache comprises a masking layer comprising liquid crystals able to pass from an opaque state to a transparent state under the effect of an external field includes the following steps:
- the manufacturing method according to the fourth particular embodiment of an authenticatable object in which the cache comprises a masking layer comprising magnetic particles further comprises the incorporation of a material comprising magnetic particles.
- the present invention also relates to the use of an authenticatable object as described above in an anti-counterfeiting system.
- the authenticatable object according to the present invention may be a bank card, a security badge, a document, a piece of identification, luxury items (jewelry, clothing, accessories ...), products pharmaceuticals.
- the present invention also relates to a method of authenticating an object comprising an authenticating pattern masked by a cache, in which the cache is either physically deformed or optically activated using an external field, advantageously using an electric current, an electric field, and / or a magnetic field, to allow the identification of the authenticating pattern.
- the cache can only be activated by placing the electrical points in a localized manner. This system makes it possible to precisely locate the anode and the cathode for the optical measurement. The probability of discovering the presence of fluorophores by counterfeiters is therefore reduced.
- FIGS. 1A and 1B schematically represent an object that can be authenticated in a first mode embodiment of the invention.
- the cover (13) comprises a masking layer in photochromic or liquid crystals. This masking layer becomes transparent under the effect of an external field as illustrated in FIG. 1B.
- the fluorescent particles (2) incorporated in the substrate (1) can thus emit fluorescent light, the excitation light being no longer blocked by the cache (13) become transparent.
- FIGS. 2A and 2B diagrammatically represent an authenticatable object according to a second embodiment of the invention.
- the cover (13) comprises a masking layer made of a deformable material. This masking layer is physically deformed under the effect of an external field as illustrated in FIG. 2B.
- the fluorescent particles (2) incorporated in the substrate (1) can thus emit fluorescent light, the excitation light being no longer blocked by the cover (13).
- FIG. 3A diagrammatically represents an optical detection authentication system according to the prior art, in which fluorescent particles (2), or fluorophores (2), are incorporated in a substrate (1).
- FIG. 3B shows the emission of the fluorophores (2) of the authentication system according to the prior art when they are subjected to excitation.
- FIG. 4A represents the cache of the authenticatable object according to the invention when it comprises a masking layer (6) in photochrome.
- the layer of photochromic material which is sensitive to the external field, is between two transparent conductive layers (5).
- the two transparent conductive layers (5) are respectively connected to an anode (3) and a cathode (4).
- FIG. 4B represents the cache of the authenticatable object according to the invention when the masking layer (6) comprises liquid crystals.
- the masking layer (6) is between two glasses with electrodes corresponding to the vertical (8) and horizontal (9) filters. These glasses are connected to electrical contacts (4).
- the glass with electrode corresponding to the vertical filter (8) is covered with a (vertical) polarization filter (7).
- the glass with electrode corresponding to the horizontal filter (9) is covered with a horizontal filter which allows to block and let the light (10). The latter is covered with a reflective surface (11).
- FIGS. 5A to 5D show the successive steps of producing an authenticatable object provided with a cache comprising a photochromic material that can pass from an opaque state to a transparent state under the effect of an external field.
- FIGS. 6A to 6D show the successive steps of producing an authenticatable object provided with a mask comprising a material physically deformable under the effect of an external field.
- FIGS. 7A to 7E show the successive steps of producing an authenticatable object provided with a cache comprising liquid crystals able to pass from an opaque state to a transparent state under the effect of an external field.
- FIGS. 8A, 8B and 8C illustrate the state 2 for which the simultaneous application of an electric current and / or a magnetic field on the anode and the cathode of the cache is necessary to activate said cache.
- the activated cache (become transparent in FIGS. 8A and 8C or having risen in FIG. 8B) makes it possible to detect the authenticating pattern.
- the present invention relates to an authenticatable object whose substrate comprises at least one authentication or identification pattern, and in which a cache makes it possible to mask and reveal the portion of the substrate containing the authenticating pattern.
- this authenticatable object can be made according to one of the three preferred embodiments detailed below, in the particular case where the authenticating pattern comprises fluorescent particles incorporated in the substrate.
- the first particular embodiment relates to an authenticatable object whose cache comprises a photochromic material changing color under the effect of an external field.
- the device is prepared according to the following steps illustrated by FIGS. 5A to 5D:
- fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern.
- the cache is constituted during the steps 5B to 5D:
- the second step illustrated in FIG. 5B consists of depositing a transparent conductive material (5) on at least the zone of the substrate comprising the authenticating pattern, then etching it by chemical or laser means in order to give it the desired shape to obtain an electrode preferably the anode;
- a photochromic material is deposited on the transparent conductive layer to form the masking layer (6), either by printing or full layer.
- the photochromic material is then chemically etched or laser etched when it is intended to be located on the anode.
- the anode must be disengaged, advantageously by chemical etching or laser, to allow electrical contact; the fourth and last step of this process is illustrated in Figure 5D. It comprises depositing a transparent conductive material (5) on the masking layer (6) of photochromic material. This second transparent conductive layer is then etched chemically or laser to the desired shape to obtain an electrode, preferably the cathode.
- anode and the cathode must be well separated to avoid any short circuit.
- the second particular embodiment relates to an authenticatable object whose cache comprises a physically deformable material under the effect of an external field.
- the authenticatable object is prepared according to the following steps illustrated in FIGS. 6A to 6D.
- fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern.
- the cache is constituted during steps 6B to 6D:
- a so-called “transparent release layer” layer (12) is deposited at least on the area of the substrate (1) comprising the authenticating pattern. It allows the upper layers not to adhere to the substrate, at least on the substrate area (1) comprising the authenticating pattern. Thus, the cover can be lifted during electrical activation;
- Figure 6C illustrates the deposition of a transparent conductive material (5) which is then chemically or laser etched to the desired shape to obtain an electrode, preferably the anode. This layer partially adheres to the substrate.
- 6C also illustrates the deposition of the masking layer (6) made of physically deformable material under the effect of an external field, either by printing or by a full layer; before being etched by chemical or laser when it is intended to be located on the anode.
- the anode must be unobstructed to allow electrical contact.
- Figure 6D illustrates the deposition of a transparent conductive material (5) which is then etched chemically or laser to the desired shape to obtain the cathode. Anodes and cathodes must be well separated to avoid short circuits. 3. Masking layer in liquid crystals
- the third particular embodiment relates to an authenticatable object whose cache comprises liquid crystals.
- the device is prepared according to the following steps illustrated by FIGS. 7A to 7E:
- fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern.
- the cache which can be likened to a liquid crystal display, is constituted during steps 7B to 7E:
- FIG. 7B illustrates the deposition of a polarization filter (7) (vertical),
- FIG. 7C illustrates the deposition of a glass with electrodes corresponding to the vertical filter (8) on the polarization filter (7);
- FIG. 7C illustrates the deposition of the liquid crystals to form the masking layer (6), deposited by printing by capillarity or by any other means, on the glass with electrodes (8);
- FIG. 7D illustrates the deposition of a glass with electrodes corresponding to the horizontal filter (9) on the masking layer (6) in liquid crystals;
- FIG. 7E illustrates the deposition of the horizontal filter for blocking / allowing the light (10) to pass over the glass with electrodes (9);
- Figure 7E illustrates the deposition of a reflecting surface (11) on the horizontal filter (10). All these production techniques represent non-limiting examples. The skilled person can use all appropriate techniques such as screen printing, heliography, buffer.
- the activation of the cache must be performed simultaneously with the optical detection of the authenticating pattern (2).
- FIGS. 5D, 6D and 7E illustrate the state 1 in which the cache covering the region of the substrate (1) comprising the authenticating pattern renders any measurement of photo-luminescence of the fluorophores impossible.
- FIGS. 8A, 8B, 8C illustrate the state 2 for which the simultaneous application of an electric current (or magnetic current) on the anode and the cathode of the authenticatable object is necessary to activate the cache.
- the activation of the cache (which became transparent in FIGS. 8A and 8C or raised in FIG. 8B) allows the "reading" or optical measurement to detect the presence of fluorophores (2), a guarantee of traceability.
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- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to an object which can be authenticated and which comprises a substrate, said substrate containing at least one authenticating or identification pattern. Said pattern is covered by a cover for masking and exposing the pattern. The pattern is fluorescent and comprises organic fluorescent particles and/or inorganic fluorescent particles included in the substrate. The cover can be physically or structurally deformed in order to expose said pattern.
Description
OBJET AUTHENTIFIABLE CONTENANT UN CACHE MASQUANT UN MOTIF AUTHENTIFIANT AUTHENTICABLE OBJECT CONTAINING A CACHE HAVING AN AUTHENTICATING PATTERN
DOMAINE DE L'INVENTION FIELD OF THE INVENTION
La présente invention concerne un objet authentifiable comprenant un cache permettant de masquer et de révéler un motif authentifiant. The present invention relates to an authenticatable object including a cache for masking and revealing an authenticating pattern.
Le domaine d'utilisation de la présente invention concerne notamment la lutte contre la contrefaçon de documents ou de produits protégés. The field of use of the present invention relates in particular to the fight against counterfeiting of documents or protected products.
ETAT ANTÉRIEUR DE LA TECHNIQUE PRIOR STATE OF THE ART
Il existe de nombreux moyens permettant de lutter contre la reproduction illicite de documents ou de produits divers, comme par exemple l'incorporation de marqueurs fluorescents dans différents média (plastique, papier...). Cependant, la détection et la reconnaissance de ces dispositifs est bien souvent aisée et peu dissuasive envers le contrefacteur averti. En effet, dans certains cas, il est relativement aisé de déjouer les systèmes anticontrefaçon. Ainsi, la protection mettant en œuvre la détection d'un spectre d'émission de particules fluorescentes peut s'avérer insuffisante. There are many ways to combat the illegal reproduction of documents or various products, such as the incorporation of fluorescent markers in different media (plastic, paper ...). However, the detection and recognition of these devices is often easy and little dissuasive towards the informed counterfeiter. Indeed, in some cases, it is relatively easy to thwart anti-counterfeiting systems. Thus, the protection implementing the detection of a fluorescent particle emission spectrum may be insufficient.
Le document US 6,061,122 décrit un système dont l'authenticité est déterminée par reconnaissance des propriétés optiques des cristaux liquides cholestériques utilisés dans sa fabrication. Ces cristaux liquides peuvent réfléchir la lumière à certaines longueurs d'onde et ainsi permettre la formation d'images de type holographique difficiles à reproduire. US 6,061,122 discloses a system whose authenticity is determined by recognition of the optical properties of cholesteric liquid crystals used in its manufacture. These liquid crystals can reflect light at certain wavelengths and thus allow the formation of holographic type images difficult to reproduce.
Le document US 2003/0173539 décrit un marquage, comprenant des cristaux liquides, invisible à l'œil mais pouvant être détecté à l'aide d'un appareil de détection tel qu'un polariseur ou un filtre coloré. US 2003/0173539 discloses a marking, comprising liquid crystals, invisible to the eye but can be detected using a detection apparatus such as a polarizer or a color filter.
Le document US 6,580,481 décrit un dispositif comportant des inscriptions visibles et des inscriptions invisibles. Les inscriptions invisibles sont enregistrées sur une couche magnétique sur laquelle l'information n'est enregistrable qu'une seule fois ou dans la mémoire d'un circuit intégré dans lequel l'information peut être enregistrée et effacée. Un appareil de détection rend les inscriptions invisibles visibles.
Ces dispositifs nécessitent donc un équipement spécial afin de récupérer ou de révéler les informations cachées ou les informations non cachées mais difficiles à reproduire. US 6,580,481 discloses a device with visible inscriptions and invisible inscriptions. Invisible inscriptions are recorded on a magnetic layer on which the information is recordable only once or in the memory of an integrated circuit in which the information can be recorded and erased. A detection device makes the inscriptions invisible visible. These devices therefore require special equipment to recover or reveal hidden information or information not hidden but difficult to reproduce.
Des dispositifs permettant notamment de dissimuler ces marqueurs ont donc été développés. L'appareil de détection effectue alors la lecture des marqueurs après avoir désactivé le système de verrouillage dissimulant lesdits marqueurs. Devices allowing in particular to hide these markers have been developed. The detection device then reads the markers after deactivating the locking system concealing said markers.
Ainsi, le document US 2006/0126001 divulgue un dispositif dans lequel un motif anticontrefaçon à détecter est incorporé dans un matériau. Ce dispositif présente deux états distincts, l'un permettant la dissimulation du motif anticontrefaçon et l'autre permettant sa détection. Il s'agit donc dans un premier temps, de rendre le matériau « transparent » à la lumière de détection, avant d'effectuer la lecture proprement dite du motif. Tout en restant difficile à dupliquer, le motif anticontrefaçon de ce dispositif est rendu visible à l'œil humain, sans la nécessité de dispositifs de détection spécialisés. Dans ce dispositif, le matériau comporte deux états stables, il contient également le motif anticontrefaçon. Il est aussi important de noter que ce dispositif peut poser des problèmes de compatibilité entre les matériaux constituant le motif et ceux constituant le cache. La plupart des dispositifs décrits ci-avant permettent de protéger, par exemple, des documents contre toute contrefaçon à l'aide de scanners, photocopieurs, spectromètres et autres. Ils nécessitent généralement un appareil de détection spécial pour faire apparaître les motifs de marquage. Le document WO 82/02445 décrit un article identifiable comprenant un élément distinctif tel qu'une photographie. Un masque, généralement opaque, recouvre de manière permanente l'élément distinctif. Ce masque est réalisé en matériau susceptible de passer d'un état opaque à un état transparent sous l'effet d'un champ électrique. Le passage du masque à l'état transparent permet ainsi la révélation de l'élément distinctif (photographie). Thus, document US 2006/0126001 discloses a device in which an anti-counterfeiting pattern to be detected is incorporated into a material. This device has two distinct states, one allowing concealment of the anti-counterfeiting pattern and the other allowing its detection. It is therefore a first step, to make the material "transparent" to the detection light, before performing the actual reading of the pattern. While remaining difficult to duplicate, the anti-counterfeiting pattern of this device is made visible to the human eye without the need for specialized detection devices. In this device, the material has two stable states, it also contains the anti-counterfeiting pattern. It is also important to note that this device may pose compatibility problems between the materials constituting the pattern and those constituting the cache. Most of the devices described above protect, for example, documents against any counterfeit using scanners, photocopiers, spectrometers and others. They usually require a special detection device to reveal the marking patterns. WO 82/02445 discloses an identifiable article comprising a distinctive element such as a photograph. A mask, usually opaque, permanently covers the distinctive element. This mask is made of material capable of passing from an opaque state to a transparent state under the effect of an electric field. The passage of the mask to the transparent state thus allows the revelation of the distinctive element (photography).
Le document US 2008/198278 décrit un objet comprenant une couche présentant un effet optique et pouvant être masquée par une couche supérieure opaque en l'absence de courant électrique. Cette couche supérieure opaque peut être constituée de cristaux liquides ou d'un matériau photochromique. Elle est rendue transparente par application d'un courant électrique.
Tout comme le dispositif décrit dans le document US 2006/0126001, la présente invention a trait à un objet authentifïable comprenant un motif d'authentifîcation qui n'est pas apparent dans les conditions normales d'utilisation. EXPOSE DE L ' INVENTION US 2008/198278 discloses an object comprising a layer having an optical effect and can be masked by an opaque upper layer in the absence of electric current. This opaque upper layer may consist of liquid crystals or a photochromic material. It is made transparent by application of an electric current. Like the device described in document US 2006/0126001, the present invention relates to an object that can be authenticated, comprising an authentication pattern that is not apparent under normal conditions of use. SUMMARY OF THE INVENTION
Le Demandeur a développé un objet authentifïable comprenant un cache permettant de dissimuler ou de masquer un motif authentifiant incorporé au substrat. Un appareil de détection désactive ce cache afin de pouvoir effectuer la détection du motif authentifiant, permettant ainsi de distinguer l'objet authentifïable de toute contrefaçon. The Applicant has developed an authenticatable object including a cache for concealing or hiding an authenticating pattern embedded in the substrate. A detection device deactivates this cache in order to be able to detect the authentication pattern, thus making it possible to distinguish the authenticated object from any counterfeit.
Plus précisément, la présente invention concerne un objet authentifïable comprenant un substrat, ledit substrat contenant au moins un motif authentifiant ou d'identification. Le motif est recouvert d'un cache permettant de le masquer et de le révéler, le cache étant susceptible de subir une transformation physique ou structurelle apte à permettre la révélation dudit motif. More specifically, the present invention relates to an authenticatable object comprising a substrate, said substrate containing at least one authentication or identification pattern. The pattern is covered with a cache for hiding and revealing, the cache being capable of undergoing a physical or structural transformation capable of allowing the revelation of said pattern.
En outre, le motif authentifiant est fluorescent et comporte des particules organiques fluorescentes et/ou des particules inorganiques fluorescentes incorporées dans le substrat de l'objet authentifïable. In addition, the authenticating pattern is fluorescent and comprises fluorescent organic particles and / or fluorescent inorganic particles incorporated into the substrate of the object that can be authenticated.
Le substrat de l'objet authentifïable selon la présente invention est généralement en papier, en tissu, en polymère, en verre, ou en métal. La fluorescence du motif authentifiant est assurée par la présence de fluorochromes ou fluorophores, c'est-à-dire une substance chimique capable d'émettre de la lumière de fluorescence après excitation. The substrate of the authenticatable object according to the present invention is generally made of paper, fabric, polymer, glass, or metal. The fluorescence of the authenticating pattern is ensured by the presence of fluorochromes or fluorophores, that is to say a chemical substance capable of emitting fluorescence light after excitation.
Les fluorophores inorganiques sont généralement inaltérables dans le temps et peu sensibles aux différentes chimies, facilitant ainsi leur incorporation. Dans le cadre de la présente invention, ils peuvent avantageusement être choisis dans le groupe comprenant les quantum dots, minéraux fluorites tels que l'adamite, l'hémimorphite ou la calcite.
En revanche, les fluorophores organiques sont altérables dans le temps et sensibles aux différentes chimies d'incorporation. Dans le cadre de la présente invention, ils peuvent être avantageusement choisis dans le groupe comprenant la famille des cyanines tels que Cy5, Cy3, ou les Alexa Fluor ®. Inorganic fluorophores are generally unalterable over time and insensitive to different chemistries, thus facilitating their incorporation. In the context of the present invention, they may advantageously be chosen from the group comprising quantum dots, fluorite minerals such as adamite, hemimorphite or calcite. On the other hand, the organic fluorophores are alterable in time and sensitive to the different chemistries of incorporation. In the context of the present invention, they may advantageously be chosen from the group comprising the cyanine family such as Cy5, Cy3, or Alexa Fluor®.
Les fluorophores organiques présentent l'avantage d'être excitable à une seule longueur d'onde contrairement aux fluorophores inorganiques, qui présentent un spectre d'absorption plus large. De plus, les fluorophores organiques peuvent être mis en œuvre pour une utilisation ponctuelle dans le temps, étant donné qu'ils sont altérables lorsqu'ils ne sont pas encapsulés. L'homme du métier saura choisir les fluorophores organiques et/ou inorganiques adaptés selon le motif authentifiant. Organic fluorophores have the advantage of being excitable at a single wavelength unlike inorganic fluorophores, which have a broader absorption spectrum. In addition, organic fluorophores can be implemented for point-in-time use, since they are alterable when not encapsulated. Those skilled in the art will be able to choose the organic and / or inorganic fluorophores adapted according to the authenticating pattern.
De manière générale, le motif authentifiant comporte des fluorophores dont la densité est suffisante pour permettre la détection du signal. L'homme du métier saura ajuster la densité en fonction du rendement quantique des particules choisies, de la sensibilité du détecteur, et de la puissance d'excitation disponible. In general, the authenticating pattern comprises fluorophores whose density is sufficient to allow the detection of the signal. Those skilled in the art will be able to adjust the density according to the quantum yield of the selected particles, the sensitivity of the detector, and the available excitation power.
Dans un cas particulier, le substrat lui-même peut être fluorescent et ne nécessite donc pas l'incorporation de particules fluorescentes. In a particular case, the substrate itself may be fluorescent and therefore does not require the incorporation of fluorescent particles.
Le cache de cet objet authentifïable comporte deux états stables possibles dans lesquels le motif authentifiant est soit (1) masqué, soit (2) lisible, et à tout le moins révélable, par exemple par excitation. La présente invention comporte quatre principaux modes de réalisations particuliers dans lesquels le cache comprend une couche masquante pouvant être : The cache of this authenticatable object comprises two possible stable states in which the authenticating pattern is either (1) masked, or (2) readable, and at least revealable, for example by excitation. The present invention comprises four main particular embodiments in which the cache comprises a masking layer that can be:
un matériau photochrome, c'est-à-dire un matériau apte à changer de couleur sous l'effet d'un champ externe. Il s'agit d'un matériau opaque à la lumière de détection du motif authentifiant ; il devient transparent sous l'effet d'un champ externe. Une substance phototochrome présente une coloration différente suivant l'intensité du champ auquel elle est exposée. Il s'agit de dérivés organiques ayant la propriété de changer de couleur sous l'influence d'un rayonnement et de revenir à son état initial en l'absence de rayonnement ; a photochromic material, that is to say a material capable of changing color under the effect of an external field. It is a material that is opaque to the detection light of the authenticating pattern; it becomes transparent under the effect of an external field. A phototochrome substance has a different color depending on the intensity of the field to which it is exposed. These are organic derivatives having the property of changing color under the influence of radiation and returning to its initial state in the absence of radiation;
un matériau apte à se déformer physiquement sous l'action d'un champ externe. Ce matériau est assimilable à une lame déformable sous l'action d'un champ externe ;
un matériau comprenant des cristaux liquides, passant d'un état opaque à transparent sous l'effet d'un champ externe ; a material able to deform physically under the action of an external field. This material is comparable to a deformable blade under the action of an external field; a material comprising liquid crystals, passing from an opaque to transparent state under the effect of an external field;
un matériau comprenant des particules magnétiques qui se dispersent ou se regroupent sous l'action d'un champ magnétique. a material comprising magnetic particles that disperse or cluster under the action of a magnetic field.
Avantageusement, l'épaisseur du cache est comprise entre 1 et 500 micromètres, de manière à masquer le motif authentifiant tout en permettant un passage rapide et brusque de l'état masqué à l'état lisible et vice versa. Ainsi, la discrétion du cache est également assurée. Advantageously, the thickness of the cache is between 1 and 500 micrometers, so as to mask the authenticating pattern while allowing a fast and abrupt transition from the masked state to the readable state and vice versa. Thus, the secrecy of the cache is also assured.
Dans l'objet authentifïable selon la présente invention, le cache masquant le motif authentifiant est disposé de manière à recouvrir au moins la zone du substrat comprenant le motif authentifiant. Le cache doit être « ouvert » pour que la lumière de détection puisse accéder audit motif authentifiant. Dans ce cas, la couche masquante est soit transparente, soit déformée physiquement. In the authenticatable object according to the present invention, the cache masking the authenticating pattern is arranged to cover at least the area of the substrate comprising the authenticating pattern. The cache must be "open" for the detection light to access the authentication pattern. In this case, the masking layer is either transparent or physically deformed.
Il est connu de l'homme du métier qu'en présence d'un champ externe, certains matériaux sont déformés physiquement ou changent de couleur en passant de l'opacité à la transparence. It is known to those skilled in the art that in the presence of an external field, some materials are physically deformed or change color from opacity to transparency.
Dans le cadre de l'invention, le champ externe peut être un courant électrique, un champ électrique et/ou un champ magnétique. En effet, les photochromes sont sensibles à la lumière (champ électromagnétique) alors que certains polymères sont sensibles au courant électrique (modification de structure ou de conformation). D'autre part, les cristaux liquides sont sensibles au champ électrique et les mélanges comprenant des particules magnétiques sont sensibles au champ magnétique. In the context of the invention, the external field may be an electric current, an electric field and / or a magnetic field. Indeed, photochromes are sensitive to light (electromagnetic field) while some polymers are sensitive to electric current (structure or conformation modification). On the other hand, liquid crystals are sensitive to the electric field and mixtures comprising magnetic particles are sensitive to the magnetic field.
Typiquement, la couche masquante recouvrant le motif authentifiant de l'objet authentifïable selon l'invention comporte notamment au moins un matériau avantageusement choisi dans le groupe comprenant : Typically, the masking layer covering the authenticating pattern of the authenticatable object according to the invention comprises in particular at least one material advantageously chosen from the group comprising:
un système électrochrome ITO/W03/électrolyte/Ir02/ITO (ITO = In203/Sn02) dans le cas où la couche masquante comprend un matériau photochrome ; ledit électrolyte peut être un polymère anhydre à conduction protonique obtenu par dissolution d'acide orthophosphorique dans un polymère, de préférence la polyéthylèneimine branchée (BPEI) ;
des actionneurs polymères fonctionnant à l'air libre, de préférence, à base de polyoxyéthylène (POE) et de PEDOT (poly(3,4-éthylènedioxythiophène) dans le cas où la couche masquante comprend un matériau physiquement déformable sous l'effet d'un champ externe ; an electrochromic system ITO / WO 3 / electrolyte / Ir0 2 / ITO (ITO = In 2 O 3 / SnO 2 ) in the case where the masking layer comprises a photochromic material; said electrolyte may be a proton-conductive anhydrous polymer obtained by dissolving orthophosphoric acid in a polymer, preferably branched polyethyleneimine (BPEI); polymeric actuators operating in the open air, preferably based on polyoxyethylene (POE) and PEDOT (poly (3,4-ethylenedioxythiophene) in the case where the masking layer comprises a physically deformable material under the effect of an external field;
du 70CB (heptyloxycyanobiphényl), N-(4-méthoxybenzylidène)-4-butylaniline (MBBA), benzoate de cholestéryle, para-azoxyanisole (PAA), ou un métallogène d'argent dans le cas où la couche masquante comprend des cristaux liquides ; des billes magnétiques dans le cas où la couche masquante comprend des particules magnétiques ; il peut s'agir d'une émulsion monodispersée de billes polymères a fort caractère magnétique (taux d'oxyde de fer d'au moins 50 %), lesdites billes étant calibrées à 200 ± 10 nanomètres, telle que par exemple distribuée par la société ADEMTECH. 70CB (heptyloxycyanobiphenyl), N- (4-methoxybenzylidene) -4-butylaniline (MBBA), cholesteryl benzoate, para-azoxyanisole (PAA), or a silver metallogen in the case where the masking layer comprises liquid crystals; magnetic beads in the case where the masking layer comprises magnetic particles; it may be a monodispersed emulsion of polymer beads having a strong magnetic character (iron oxide content of at least 50%), said beads being calibrated at 200 ± 10 nanometers, such as, for example, distributed by the company ADEMTECH.
Contrairement à la présente invention, le document US 2006/0126001 divulgue un écran camouflable. Ce dispositif peut ainsi présenter des problèmes liés à l'incompatibilité chimique entre les matériaux constituant le motif authentifiant et ceux constituant le cache, étant donné que l'écran contient l'image « authentifiante ». L'objet authentifïable selon la présente invention ne présente pas de tels problèmes. En effet, dans la présente invention, un cache masque le motif authentifiant. Le cache doit être actionné pour laisser apparaître la zone comprenant le motif authentifiant. Un signal lumineux (d'excitation) est ensuite nécessaire pour activer la signature (longueurs d'onde d'émission) spécifique des fluorophores ou de la combinaison de fluorophores présents. In contrast to the present invention, US 2006/0126001 discloses a hiding screen. This device can thus present problems related to the chemical incompatibility between the materials constituting the authenticating pattern and those constituting the cache, since the screen contains the "authenticating" image. The authenticatable object according to the present invention does not have such problems. Indeed, in the present invention, a cache masks the authenticating pattern. The cache must be activated to reveal the area containing the authentication pattern. A (excitation) light signal is then required to activate the signature (emission wavelengths) specific for the fluorophores or the combination of fluorophores present.
Selon un premier mode de réalisation particulier, le cache de l'objet authentifïable selon l'invention comprend : According to a first particular embodiment, the cache of the authenticated object according to the invention comprises:
une première couche de matériau conducteur transparent déposée sur au moins la zone du substrat comprenant le motif authentifiant ; a first layer of transparent conductive material deposited on at least the area of the substrate comprising the authenticating pattern;
une couche masquante, en matériau photochrome, déposée sur au moins une partie de la couche de matériau conducteur transparent, de manière à recouvrir au moins la zone du substrat comprenant le motif authentifiant ; a masking layer, of photochromic material, deposited on at least a portion of the layer of transparent conductive material, so as to cover at least the area of the substrate comprising the authenticating pattern;
une deuxième couche de matériau conducteur transparent déposée sur au moins une partie de la couche de matériau photochrome, et n'étant pas en contact avec la première couche de matériau conducteur transparent.
Selon un deuxième mode de réalisation particulier, le cache de l'objet authentifïable selon l'invention comprend : a second layer of transparent conductive material deposited on at least a portion of the layer of photochromic material, and not in contact with the first layer of transparent conductive material. According to a second particular embodiment, the cache of the object that can be authenticated according to the invention comprises:
une couche antiadhésive transparente déposée sur au moins la zone du substrat comprenant le motif authentifiant ; a transparent release layer deposited on at least the area of the substrate comprising the authenticating pattern;
une première couche de matériau conducteur transparent déposée sur au moins la zone de la couche antiadhésive transparente recouvrant la zone du substrat comprenant le motif authentifiant ; a first layer of transparent conductive material deposited on at least the area of the transparent release layer covering the area of the substrate comprising the authenticating pattern;
une couche masquante, en matériau déformable physiquement sous l'effet d'un champ externe, déposée sur la couche de matériau conducteur transparent, de manière à recouvrir la zone du substrat comprenant le motif authentifiant ; a masking layer, of physically deformable material under the effect of an external field, deposited on the layer of transparent conductive material, so as to cover the area of the substrate comprising the authenticating pattern;
une deuxième couche de matériau conducteur transparent déposée sur au moins une partie de la couche masquante, et n'étant pas en contact avec la première couche de matériau conducteur transparent. a second layer of transparent conductive material deposited on at least a portion of the masking layer, and not in contact with the first layer of transparent conductive material.
Dans les modes de réalisation qui précèdent, les couches conductrices transparentes, situées de part et d'autre de la couche masquante, sont reliées à des contacts électriques. Ces contacts électriques, avantageusement en métal ou en matériau conducteur, forment les électrodes. In the foregoing embodiments, the transparent conductive layers, located on either side of the masking layer, are connected to electrical contacts. These electrical contacts, advantageously made of metal or of conductive material, form the electrodes.
De manière avantageuse, les couches conductrices transparentes sont réalisées en ITO (In203/Sn02), ou PEDOT (poly(3,4-éthylènedioxythiophène). Advantageously, the transparent conductive layers are made of ITO (In 2 O 3 / SnO 2 ), or PEDOT (poly (3,4-ethylenedioxythiophene).
Selon un troisième mode de réalisation particulier, le cache de l'objet authentifïable selon l'invention comprend : According to a third particular embodiment, the cache of the object that can be authenticated according to the invention comprises:
un filtre de polarisation vertical déposé sur au moins la zone du substrat comprenant le motif authentifiant ; a vertical polarization filter deposited on at least the area of the substrate comprising the authenticating pattern;
un verre avec électrodes jouant le rôle de filtre vertical, déposé sur le filtre de polarisation vertical, les électrodes pouvant être en IZO (In203/ZnO) ou ITO (In203/Sn02), ; a glass with electrodes acting as a vertical filter, placed on the vertical polarization filter, the electrodes may be IZO (In 2 03 / ZnO) or ITO (In 2 0 3 / Sn0 2);
des cristaux liquides déposés sur le verre avec électrodes, de manière à recouvrir au moins la zone du substrat comprenant le motif authentifiant ; liquid crystals deposited on the glass with electrodes, so as to cover at least the area of the substrate comprising the authenticating pattern;
un verre avec électrodes jouant le rôle de filtre horizontal déposé sur les cristaux liquides ; a glass with electrodes acting as a horizontal filter deposited on the liquid crystals;
un filtre horizontal pour bloquer ou laisser passer la lumière, déposé sur le verre avec électrodes ; a horizontal filter to block or let the light, deposited on the glass with electrodes;
une surface réfléchissante, avantageusement une fine couche métallique ou diélectrique, déposée sur le filtre horizontal pour bloquer et laisser passer la lumière.
Le cache selon le troisième mode de réalisation particulier s'apparente à un afficheur à cristaux liquides. a reflective surface, preferably a thin metal or dielectric layer, deposited on the horizontal filter to block and let the light. The cache according to the third particular embodiment is similar to a liquid crystal display.
Pour tout objet authentifiant réalisé selon l'un des quatre modes de réalisation mentionnés ci-dessus, le détecteur doit, de manière simultanée : For any authenticating object made according to one of the four embodiments mentioned above, the detector must, simultaneously:
activer le cache, par exemple en appliquant un courant électrique à l'aide de pointes électriques ; et activate the cache, for example by applying an electric current using electric tips; and
éclairer de façon localisée, la zone du substrat comprenant le motif authentifiant. La présente invention concerne également les procédés de fabrication associés aux quatre modes de réalisations particuliers décrits ci-avant. localized lighting, the area of the substrate comprising the authenticating pattern. The present invention also relates to manufacturing processes associated with the four particular embodiments described above.
Par exemple, dans le cas particulier où l'objet authentifiable, dont le cache comprend une couche masquante réalisée en matériau apte à changer de couleur sous l'effet d'un champ externe et dont le motif authentifiant est fluorescent, le procédé de fabrication comprend les étapes suivantes : For example, in the particular case where the authenticatable object, whose cache comprises a masking layer made of material capable of changing color under the effect of an external field and whose authenticating pattern is fluorescent, the manufacturing process comprises the following steps:
incorporation de particules fluorescentes dans un substrat ou, le cas échéant, utilisation d'un substrat fluorescent ; incorporating fluorescent particles in a substrate or, where appropriate, using a fluorescent substrate;
dépôt d'une première couche de matériau conducteur transparent sur au moins la zone du substrat comprenant le motif authentifiant ; depositing a first layer of transparent conductive material on at least the area of the substrate comprising the authenticating pattern;
dépôt d'une couche masquante réalisée en matériau photochrome, sur au moins une partie de la couche de matériau conducteur transparent, de manière à recouvrir au moins la zone du substrat comprenant le motif authentifiant ; depositing a masking layer made of photochromic material, on at least a portion of the layer of transparent conductive material, so as to cover at least the area of the substrate comprising the authenticating pattern;
dépôt d'une deuxième couche de matériau conducteur transparent sur au moins une partie de la couche de matériau photochrome, et n'étant pas en contact avec la première couche de matériau conducteur transparent. depositing a second layer of transparent conductive material on at least a portion of the layer of photochromic material, and not in contact with the first layer of transparent conductive material.
Le procédé de fabrication selon le deuxième mode de réalisation particulier d'un objet authentifiable, dont le cache comprend une couche masquante réalisée en matériau apte à subir une déformation sous l'effet d'un champ externe, et un motif authentifiant fluorescent, comprend les étapes suivantes : The manufacturing method according to the second particular embodiment of an authenticatable object, whose cache comprises a masking layer made of material capable of undergoing deformation under the effect of an external field, and a fluorescent authenticating pattern, comprises the following steps :
incorporation de particules fluorescentes dans un substrat ou, le cas échéant, utilisation d'un substrat fluorescent ; incorporating fluorescent particles in a substrate or, where appropriate, using a fluorescent substrate;
dépôt d'une couche antiadhésive transparente sur au moins la zone du substrat comprenant le motif authentifiant ;
dépôt d'une première couche de matériau conducteur transparent sur au moins la zone de la couche antiadhésive transparente recouvrant la zone du substrat comprenant le motif authentifiant ; depositing a transparent release layer on at least the area of the substrate comprising the authenticating pattern; depositing a first layer of transparent conductive material on at least the area of the transparent release layer covering the area of the substrate comprising the authenticating pattern;
dépôt d'une couche masquante réalisée en matériau déformable physiquement sous l'effet d'un champ externe, sur la couche de matériau conducteur transparent, de manière à couvrir la zone du substrat comprenant le motif authentifiant ; depositing a masking layer made of physically deformable material under the effect of an external field, on the layer of transparent conductive material, so as to cover the area of the substrate comprising the authenticating pattern;
dépôt d'une deuxième couche de matériau conducteur transparent sur au moins une partie de la couche masquante, et n'étant pas en contact avec la première couche de matériau conducteur transparent. depositing a second layer of transparent conductive material on at least a portion of the masking layer, and not in contact with the first layer of transparent conductive material.
Le procédé de fabrication selon le troisième mode de réalisation particulier d'un objet authentifïable dans lequel le cache comprend une couche masquante comprenant des cristaux liquides aptes à passer d'un état opaque à un état transparent sous l'effet d'un champ externe, comprend les étapes suivantes : The method of manufacture according to the third particular embodiment of an authenticatable object in which the cache comprises a masking layer comprising liquid crystals able to pass from an opaque state to a transparent state under the effect of an external field, includes the following steps:
incorporation de particules fluorescentes dans un substrat ou, le cas échéant, utilisation d'un substrat fluorescent ; incorporating fluorescent particles in a substrate or, where appropriate, using a fluorescent substrate;
dépôt d'un filtre de polarisation vertical sur au moins la zone du substrat comprenant le motif authentifiant ; depositing a vertical polarization filter on at least the area of the substrate comprising the authenticating pattern;
dépôt d'un verre avec électrodes correspondant au filtre vertical sur le filtre de polarisation vertical ; depositing a glass with electrodes corresponding to the vertical filter on the vertical polarization filter;
dépôt de cristaux liquides sur le verre avec électrodes correspondant au filtre vertical, de manière à recouvrir au moins la zone du substrat comprenant le motif authentifiant ; depositing liquid crystals on the glass with electrodes corresponding to the vertical filter, so as to cover at least the area of the substrate comprising the authenticating pattern;
dépôt d'un verre avec électrodes correspondant à un filtre horizontal sur les cristaux liquides ; depositing a glass with electrodes corresponding to a horizontal filter on the liquid crystals;
dépôt d'un filtre horizontal pour bloquer et laisser passer la lumière sur le verre avec électrodes correspondant au filtre horizontal ; deposition of a horizontal filter to block and let the light on the glass with electrodes corresponding to the horizontal filter;
dépôt d'une surface réfléchissante sur le filtre horizontal pour bloquer et laisser passer la lumière. deposition of a reflective surface on the horizontal filter to block and let the light.
Le procédé de fabrication selon le quatrième mode de réalisation particulier d'un objet authentifïable dans lequel le cache comprend une couche masquante comprenant des particules magnétiques comprend en outre l'incorporation d'un matériau comprenant des particules magnétiques.
La présente invention concerne également l'utilisation d'un objet authentifîable tel que décrit ci-avant dans un système anticontrefaçon. The manufacturing method according to the fourth particular embodiment of an authenticatable object in which the cache comprises a masking layer comprising magnetic particles further comprises the incorporation of a material comprising magnetic particles. The present invention also relates to the use of an authenticatable object as described above in an anti-counterfeiting system.
De manière non limitative, l'objet authentifîable selon la présente invention peut être une carte bancaire, un badge de sécurité, un document, une pièce d'identification, des objets de luxe (bijoux, vêtements, accessoires...), des produits pharmaceutiques. Without limitation, the authenticatable object according to the present invention may be a bank card, a security badge, a document, a piece of identification, luxury items (jewelry, clothing, accessories ...), products pharmaceuticals.
La présente invention concerne également un procédé d'authentifïcation d'un objet comprenant un motif authentifiant masqué par un cache, dans lequel le cache est soit déformé physiquement, soit activé optiquement à l'aide d'un champ externe, avantageusement à l'aide d'un courant électrique, d'un champ électrique, et/ou d'un champ magnétique, afin de permettre la révélation du motif authentifiant. The present invention also relates to a method of authenticating an object comprising an authenticating pattern masked by a cache, in which the cache is either physically deformed or optically activated using an external field, advantageously using an electric current, an electric field, and / or a magnetic field, to allow the identification of the authenticating pattern.
Les avantages liés à la présente invention par rapport à l'art antérieur incluent notamment : The advantages of the present invention over the prior art include:
la possibilité d'exciter de façon localisée le substrat, permettant ainsi de diminuer la quantité de fluorophores et donc de diminuer le coût du système anticontrefaçon lorsque le motif authentifiant est fluorescent ; the possibility of locally exciting the substrate, thus making it possible to reduce the quantity of fluorophores and thus to reduce the cost of the anti-counterfeiting system when the authenticating pattern is fluorescent;
le cache ne peut être activé qu'en plaçant de façon localisée les pointes électriques. Ce système permet de localiser de façon précise l'anode et la cathode pour la mesure optique. La probabilité de découvrir la présence des fluorophores par les faussaires est donc réduite. the cache can only be activated by placing the electrical points in a localized manner. This system makes it possible to precisely locate the anode and the cathode for the optical measurement. The probability of discovering the presence of fluorophores by counterfeiters is therefore reduced.
DESCRIPTION DES FIGURES DESCRIPTION OF THE FIGURES
L'invention et les avantages qui en découlent ressortiront mieux des exemples de réalisation qui suivent, donnés à titre indicatif et non limitatif à l'appui des figures suivantes, dans lesquelles : Les figures 1A et 1B représentent schématiquement un objet authentifîable selon un premier mode de réalisation de l'invention. Selon ce mode, le cache (13) comprend une couche masquante en photochrome ou en cristaux liquides. Cette couche masquante devient transparente sous l'effet d'un champ externe comme illustré sur la figure 1B. Les particules fluorescentes (2) incorporées au substrat (1) peuvent ainsi émettre de la lumière de fluorescence, la lumière d'excitation n'étant plus bloquée par le cache (13) devenu transparent.
Les figures 2 A et 2B représentent schématiquement un objet authentifiable selon un deuxième mode de réalisation de l'invention. Selon ce mode, le cache (13) comprend une couche masquante réalisée en un matériau déformable. Cette couche masquante est physiquement déformée sous l'effet d'un champ externe comme illustré sur la figure 2B. Les particules fluorescentes (2) incorporées au substrat (1) peuvent ainsi émettre de la lumière de fluorescence, la lumière d'excitation n'étant plus bloquée par le cache (13). The invention and the advantages resulting therefrom will emerge more clearly from the following exemplary embodiments, given as an indication and not by way of limitation, in support of the following figures, in which: FIGS. 1A and 1B schematically represent an object that can be authenticated in a first mode embodiment of the invention. According to this mode, the cover (13) comprises a masking layer in photochromic or liquid crystals. This masking layer becomes transparent under the effect of an external field as illustrated in FIG. 1B. The fluorescent particles (2) incorporated in the substrate (1) can thus emit fluorescent light, the excitation light being no longer blocked by the cache (13) become transparent. FIGS. 2A and 2B diagrammatically represent an authenticatable object according to a second embodiment of the invention. According to this mode, the cover (13) comprises a masking layer made of a deformable material. This masking layer is physically deformed under the effect of an external field as illustrated in FIG. 2B. The fluorescent particles (2) incorporated in the substrate (1) can thus emit fluorescent light, the excitation light being no longer blocked by the cover (13).
La figure 3 A représente schématiquement un système d'authentification à détection optique selon l'art antérieur, dans lequel des particules fluorescentes (2), ou fluorophores (2), sont incorporées à un substrat (1). FIG. 3A diagrammatically represents an optical detection authentication system according to the prior art, in which fluorescent particles (2), or fluorophores (2), are incorporated in a substrate (1).
La figure 3B représente l'émission des fluorophores (2) du système d'authentification selon l'art antérieur lorsqu'ils sont soumis à une excitation. FIG. 3B shows the emission of the fluorophores (2) of the authentication system according to the prior art when they are subjected to excitation.
La figure 4A représente le cache de l'objet authentifiable selon l'invention lorsqu'il comprend une couche masquante (6) en photochrome. La couche de matériau photochrome, qui est sensible au champ externe, est comprise entre deux couches conductrices transparentes (5). Les deux couches conductrices transparentes (5) sont respectivement reliées à une anode (3) et une cathode (4). FIG. 4A represents the cache of the authenticatable object according to the invention when it comprises a masking layer (6) in photochrome. The layer of photochromic material, which is sensitive to the external field, is between two transparent conductive layers (5). The two transparent conductive layers (5) are respectively connected to an anode (3) and a cathode (4).
La figure 4B représente le cache de l'objet authentifiable selon l'invention lorsque la couche masquante (6) comprend des cristaux liquides. La couche masquante (6) est comprise entre deux verres avec électrodes correspondant aux filtres vertical (8) et horizontal (9). Ces verres sont reliés à des contacts électriques (4). Le verre avec électrode correspondant au filtre vertical (8) est recouvert d'un filtre de polarisation (vertical) (7). Le verre avec électrode correspondant au filtre horizontal (9) est recouvert d'un filtre horizontal qui permet de bloquer et de laisser passer la lumière (10). Ce dernier est recouvert d'une surface réfléchissante (11). FIG. 4B represents the cache of the authenticatable object according to the invention when the masking layer (6) comprises liquid crystals. The masking layer (6) is between two glasses with electrodes corresponding to the vertical (8) and horizontal (9) filters. These glasses are connected to electrical contacts (4). The glass with electrode corresponding to the vertical filter (8) is covered with a (vertical) polarization filter (7). The glass with electrode corresponding to the horizontal filter (9) is covered with a horizontal filter which allows to block and let the light (10). The latter is covered with a reflective surface (11).
Les figures 5A à 5D représentent les étapes successives de réalisation d'un objet authentifiable muni d'un cache comprenant un matériau photochrome pouvant passer d'un état opaque à un état transparent sous l'effet d'un champ externe. FIGS. 5A to 5D show the successive steps of producing an authenticatable object provided with a cache comprising a photochromic material that can pass from an opaque state to a transparent state under the effect of an external field.
Les figures 6 A à 6D représentent les étapes successives de réalisation d'un objet authentifiable muni d'un cache comportant un matériau déformable physiquement sous l'effet d'un champ externe. FIGS. 6A to 6D show the successive steps of producing an authenticatable object provided with a mask comprising a material physically deformable under the effect of an external field.
Les figures 7A à 7E représentent les étapes successives de réalisation d'un objet authentifiable muni d'un cache comportant des cristaux liquides pouvant passer d'un état opaque à un état transparent sous l'effet d'un champ externe.
Les figures 8A, 8B et 8C illustrent l'état 2 pour lequel l'application simultanée d'un courant électrique et/ou d'un champ magnétique sur l'anode et la cathode du cache est nécessaire pour activer ledit cache. Le cache activé (devenu transparent sur les figures 8A et 8C ou s'étant soulevé sur la figure 8B) permet la détection du motif authentifiant. FIGS. 7A to 7E show the successive steps of producing an authenticatable object provided with a cache comprising liquid crystals able to pass from an opaque state to a transparent state under the effect of an external field. FIGS. 8A, 8B and 8C illustrate the state 2 for which the simultaneous application of an electric current and / or a magnetic field on the anode and the cathode of the cache is necessary to activate said cache. The activated cache (become transparent in FIGS. 8A and 8C or having risen in FIG. 8B) makes it possible to detect the authenticating pattern.
DESCRIPTION DÉTAILLÉE DE L'INVENTION DETAILED DESCRIPTION OF THE INVENTION
Comme déjà indiqué, la présente invention concerne un objet authentifïable dont le substrat comporte au moins un motif authentifiant ou d'identification, et dans lequel un cache permet de masquer et de révéler la partie du substrat contenant le motif authentifiant. As already indicated, the present invention relates to an authenticatable object whose substrate comprises at least one authentication or identification pattern, and in which a cache makes it possible to mask and reveal the portion of the substrate containing the authenticating pattern.
De manière avantageuse, cet objet authentifïable peut être réalisé selon l'un des trois modes de réalisations préférés détaillés ci-dessous, dans le cas particulier où le motif authentifiant comporte des particules fluorescentes incorporées au substrat. Advantageously, this authenticatable object can be made according to one of the three preferred embodiments detailed below, in the particular case where the authenticating pattern comprises fluorescent particles incorporated in the substrate.
1. Couche masquante réalisée en matériau photochrome Le premier mode de réalisation particulier concerne un objet authentifïable dont le cache comprend un matériau photochrome changeant de couleur sous l'effet d'un champ externe. Le dispositif est préparé selon les étapes suivantes illustrées par les figures 5A à 5D : 1. Masking layer made of photochromic material The first particular embodiment relates to an authenticatable object whose cache comprises a photochromic material changing color under the effect of an external field. The device is prepared according to the following steps illustrated by FIGS. 5A to 5D:
Sur la figure 5 A, des fluorophores (2) sont incorporés au substrat (1) pour former le motif authentifiant. In FIG. 5A, fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern.
Le cache est constitué lors des étapes 5B à 5D : The cache is constituted during the steps 5B to 5D:
la deuxième étape illustrée par la figure 5B consiste à déposer un matériau conducteur transparent (5) sur au moins la zone du substrat comprenant le motif authentifiant, puis à le graver par voie chimique ou laser afin de lui donner la forme désirée pour obtenir une électrode, de préférence l'anode ; the second step illustrated in FIG. 5B consists of depositing a transparent conductive material (5) on at least the zone of the substrate comprising the authenticating pattern, then etching it by chemical or laser means in order to give it the desired shape to obtain an electrode preferably the anode;
lors de la troisième étape, illustrée par la figure 5C, un matériau photochrome est déposé sur la couche conductrice transparente pour former la couche masquante (6), soit par impression, soit pleine couche. Le matériau photochrome est ensuite gravé par voie chimique ou laser lorsqu'il est destiné à être localisé sur l'anode. in the third step, illustrated in Figure 5C, a photochromic material is deposited on the transparent conductive layer to form the masking layer (6), either by printing or full layer. The photochromic material is then chemically etched or laser etched when it is intended to be located on the anode.
L'anode doit être dégagée, avantageusement par gravure chimique ou laser, pour permettre le contact électrique ;
la quatrième et dernière étape de ce procédé est illustrée par la figure 5D. Elle comprend le dépôt d'un matériau conducteur transparent (5) sur la couche masquante (6) en matériau photochrome. Cette deuxième couche conductrice transparente est ensuite gravée par voie chimique ou laser à la forme désirée pour obtenir une électrode, de préférence la cathode. Bien entendu, l'anode et la cathode doivent être bien séparées pour éviter tout court-circuit. The anode must be disengaged, advantageously by chemical etching or laser, to allow electrical contact; the fourth and last step of this process is illustrated in Figure 5D. It comprises depositing a transparent conductive material (5) on the masking layer (6) of photochromic material. This second transparent conductive layer is then etched chemically or laser to the desired shape to obtain an electrode, preferably the cathode. Of course, the anode and the cathode must be well separated to avoid any short circuit.
2. Couche masquante réalisée en matériau physiquement déformable Le deuxième mode de réalisation particulier concerne un objet authentifïable dont le cache comprend un matériau physiquement déformable sous l'effet d'un champ externe. L'objet authentifïable est préparé selon les étapes suivantes illustrées par les figures 6 A à 6D. Sur la figure 6 A, des fluorophores (2) sont incorporés au substrat (1) pour former le motif authentifiant. 2. Masking layer made of physically deformable material The second particular embodiment relates to an authenticatable object whose cache comprises a physically deformable material under the effect of an external field. The authenticatable object is prepared according to the following steps illustrated in FIGS. 6A to 6D. In Fig. 6A, fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern.
Le cache est constitué lors des étapes 6B à 6D : The cache is constituted during steps 6B to 6D:
lors de la deuxième étape illustrée par la figure 6B, une couche dite « couche antiadhésive transparente » (12) est déposée au moins sur la zone du substrat (1) comprenant le motif authentifiant. Elle permet aux couches supérieures de ne pas adhérer au substrat, au moins sur la zone du substrat (1) comprenant le motif authentifiant. Ainsi, le cache peut être soulevé lors de l'activation électrique ; la figure 6C illustre le dépôt d'un matériau conducteur transparent (5) qui est ensuite gravé par voie chimique ou laser à la forme désirée pour obtenir une électrode, de préférence l'anode. Cette couche adhère partiellement au substrat. La figure 6C illustre également le dépôt de la couche masquante (6), en matériau physiquement déformable sous l'effet d'un champ externe, soit par impression soit pleine couche; avant d'être gravée par voie chimique ou laser lorsqu'elle est destinée à être localisée sur l'anode. L'anode doit être dégagée pour permettre le contact électrique. in the second step illustrated in FIG. 6B, a so-called "transparent release layer" layer (12) is deposited at least on the area of the substrate (1) comprising the authenticating pattern. It allows the upper layers not to adhere to the substrate, at least on the substrate area (1) comprising the authenticating pattern. Thus, the cover can be lifted during electrical activation; Figure 6C illustrates the deposition of a transparent conductive material (5) which is then chemically or laser etched to the desired shape to obtain an electrode, preferably the anode. This layer partially adheres to the substrate. FIG. 6C also illustrates the deposition of the masking layer (6) made of physically deformable material under the effect of an external field, either by printing or by a full layer; before being etched by chemical or laser when it is intended to be located on the anode. The anode must be unobstructed to allow electrical contact.
la figure 6D illustre le dépôt d'un matériau conducteur transparent (5) qui est ensuite gravé par voie chimique ou laser à la forme désirée pour obtenir la cathode. Anode et cathode doivent être bien séparées pour éviter tout court- circuit.
3. Couche masquante en cristaux liquides Figure 6D illustrates the deposition of a transparent conductive material (5) which is then etched chemically or laser to the desired shape to obtain the cathode. Anodes and cathodes must be well separated to avoid short circuits. 3. Masking layer in liquid crystals
Le troisième mode de réalisation particulier concerne un objet authentifiable dont le cache comprend des cristaux liquides. Le dispositif est préparé selon les étapes suivantes illustrées par les figures 7A à 7E : The third particular embodiment relates to an authenticatable object whose cache comprises liquid crystals. The device is prepared according to the following steps illustrated by FIGS. 7A to 7E:
Sur la figure 7 A, des fluorophores (2) sont incorporés au substrat (1) pour former le motif authentifiant. Le cache, qui peut être assimilé à un afficheur à cristaux liquides, est constitué lors des étapes 7B à 7E : In Figure 7A, fluorophores (2) are incorporated in the substrate (1) to form the authenticating pattern. The cache, which can be likened to a liquid crystal display, is constituted during steps 7B to 7E:
la figure 7B illustre le dépôt d'un filtre de polarisation (7) (vertical), FIG. 7B illustrates the deposition of a polarization filter (7) (vertical),
la figure 7C illustre le dépôt d'un verre avec électrodes correspondant au filtre vertical (8) sur le filtre de polarisation (7) ; FIG. 7C illustrates the deposition of a glass with electrodes corresponding to the vertical filter (8) on the polarization filter (7);
- la figure 7C illustre le dépôt des cristaux liquides pour former la couche masquante (6), dépôt réalisé par impression par capillarité ou par tout autre moyen, sur le verre avec électrodes (8) ; FIG. 7C illustrates the deposition of the liquid crystals to form the masking layer (6), deposited by printing by capillarity or by any other means, on the glass with electrodes (8);
la figure 7D illustre le dépôt d'un verre avec électrodes correspondant au filtre horizontal (9) sur la couche masquante (6) en cristaux liquides ; FIG. 7D illustrates the deposition of a glass with electrodes corresponding to the horizontal filter (9) on the masking layer (6) in liquid crystals;
- la figure 7E illustre le dépôt du filtre horizontal pour bloquer/laisser passer la lumière (10), sur le verre avec électrodes (9) ; FIG. 7E illustrates the deposition of the horizontal filter for blocking / allowing the light (10) to pass over the glass with electrodes (9);
la figure 7E illustre le dépôt d'une surface réfléchissante (11) sur le filtre horizontal (10). Toutes ces techniques de réalisation représentent des exemples non limitatifs. L'homme du métier pourra utiliser toutes les techniques appropriées comme la sérigraphie, Γ héliographie, le tampon. Figure 7E illustrates the deposition of a reflecting surface (11) on the horizontal filter (10). All these production techniques represent non-limiting examples. The skilled person can use all appropriate techniques such as screen printing, heliography, buffer.
Dans ces trois modes de réalisations préférés, l'activation du cache doit être effectuée simultanément à la détection optique du motif authentifiant (2). In these three preferred embodiments, the activation of the cache must be performed simultaneously with the optical detection of the authenticating pattern (2).
A l'état 1, la zone du substrat (1) comprenant le motif authentifiant est recouverte, il n'y a pas de détection possible de la présence des fluorophores. Les figures 5D, 6D et 7E illustrent l'état 1 dans lequel le cache recouvrant la zone du substrat (1) comprenant le motif authentifiant rend toute mesure de photo luminescence des fluorophores impossible.
Les figures 8A, 8B, 8C illustrent l'état 2 pour lequel l'application simultanée d'un courant électrique (ou magnétique) sur l'anode et la cathode de l'objet authentifiable est nécessaire pour activer le cache. L'activation du cache (devenu transparent sur les figures 8A et 8C ou s'étant soulevé sur la figure 8B) permet la « lecture » ou une mesure optique pour détecter la présence de fluorophores (2), gage de traçabilité.
In state 1, the region of the substrate (1) comprising the authenticating pattern is covered, there is no possible detection of the presence of fluorophores. FIGS. 5D, 6D and 7E illustrate the state 1 in which the cache covering the region of the substrate (1) comprising the authenticating pattern renders any measurement of photo-luminescence of the fluorophores impossible. FIGS. 8A, 8B, 8C illustrate the state 2 for which the simultaneous application of an electric current (or magnetic current) on the anode and the cathode of the authenticatable object is necessary to activate the cache. The activation of the cache (which became transparent in FIGS. 8A and 8C or raised in FIG. 8B) allows the "reading" or optical measurement to detect the presence of fluorophores (2), a guarantee of traceability.
Claims
1. Objet authentifïable comprenant un substrat (1), ledit substrat (1) contenant au moins un motif authentifiant ou d'identification recouvert d'un cache permettant de masquer et de révéler ledit motif authentifiant, le cache étant susceptible de subir une transformation physique ou structurelle apte à permettre la révélation dudit motif, ledit motif authentifiant étant fluorescent et comportant des particules organiques fluorescentes (2) et/ou des particules inorganiques fluorescentes (2) incorporées dans le substrat (1). 1. Authenticable object comprising a substrate (1), said substrate (1) containing at least one authentication or identification pattern covered with a cache for masking and revealing said authenticating pattern, the cache being capable of undergoing a physical transformation or structural adapted to allow the revelation of said pattern, said authenticating pattern being fluorescent and comprising fluorescent organic particles (2) and / or inorganic fluorescent particles (2) incorporated in the substrate (1).
2. Objet authentifïable selon la revendication 1, caractérisé en ce que le cache comprend une couche masquante (6) réalisée en un matériau apte à changer de couleur sous l'action d'un courant électrique, d'un champ électrique et/ou magnétique. 2. Authenticable object according to claim 1, characterized in that the cache comprises a masking layer (6) made of a material capable of changing color under the action of an electric current, an electric field and / or magnetic .
3. Objet authentifïable selon la revendication 1, caractérisé en ce que le cache comprend une couche masquante (6) réalisée en un matériau déformable physiquement sous l'effet d'un courant électrique, d'un champ électrique et/ou d'un champ magnétique. 3. Authenticable object according to claim 1, characterized in that the cache comprises a masking layer (6) made of a physically deformable material under the effect of an electric current, an electric field and / or a field magnetic.
4. Objet authentifïable selon la revendication 1, caractérisé en ce que le cache comprend une couche masquante (6) comportant des cristaux liquides. 4. Authenticable object according to claim 1, characterized in that the cache comprises a masking layer (6) comprising liquid crystals.
5. Objet authentifïable selon la revendication 1, caractérisé en ce que le cache comprend une couche masquante (6) comportant des particules magnétiques. 5. Authenticable object according to claim 1, characterized in that the cache comprises a masking layer (6) comprising magnetic particles.
6. Objet authentifïable selon l'une des revendications 1 à 3, caractérisé en ce que le cache comprend deux couches conductrices transparentes (5) situées de part et d'autre de la couche masquante (6). 6. Authenticable object according to one of claims 1 to 3, characterized in that the cache comprises two transparent conductive layers (5) located on either side of the masking layer (6).
7. Objet authentifïable selon la revendication 6, caractérisé en ce que les couches conductrices transparentes (5) sont réalisées en ITO ou PEDOT. 7. Authenticable object according to claim 6, characterized in that the transparent conductive layers (5) are made of ITO or PEDOT.
8. Objet authentifïable selon l'une des revendications précédentes, caractérisé en ce que le substrat (1) est en papier, en tissu, en polymère, en verre, ou en métal. Utilisation d'un objet authentifïable selon l'une des revendications 1 à 8 dans un système anticontrefaçon. 8. Authenticable object according to one of the preceding claims, characterized in that the substrate (1) is paper, fabric, polymer, glass, or metal. Use of an authenticatable object according to one of claims 1 to 8 in an anti-counterfeiting system.
Procédé d'authentifïcation d'un objet dans lequel ledit objet comprend un motif authentifiant masqué par un cache selon l'une des revendications 1 à 8, caractérisé en ce que ledit cache est déformé physiquement sous l'action d'un courant électrique, d'un champ électrique et/ou d'un champ magnétique, afin de permettre la révélation du motif authentifiant. A method of authenticating an object in which said object comprises an authenticating pattern masked by a cache according to one of claims 1 to 8, characterized in that said cache is physically deformed under the action of an electric current, d an electric field and / or a magnetic field, in order to allow the revealing of the authenticating pattern.
Procédé d'authentifïcation d'un objet dans lequel ledit objet comprend un motif authentifiant masqué par un cache selon l'une des revendications 1 à 8, caractérisé en ce que ledit cache est activé optiquement à l'aide d'un champ externe, avantageusement à l'aide d'un courant électrique, d'un champ électrique et/ou d'un champ magnétique afin de permettre la révélation du motif authentifiant. A method of authenticating an object in which said object comprises an authenticating pattern masked by a cache according to one of claims 1 to 8, characterized in that said cache is optically activated using an external field, advantageously using an electric current, an electric field and / or a magnetic field to allow the identification of the authenticating pattern.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1057187A FR2964596B1 (en) | 2010-09-10 | 2010-09-10 | AUTHENTICABLE OBJECT CONTAINING A CACHE HAVING AN AUTHENTICATING PATTERN |
PCT/EP2011/060998 WO2012031795A1 (en) | 2010-09-10 | 2011-06-30 | Object which can be authenticated and which contains a cover masking an authenticating pattern |
Publications (1)
Publication Number | Publication Date |
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EP2613947A1 true EP2613947A1 (en) | 2013-07-17 |
Family
ID=43598376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP11728838.1A Withdrawn EP2613947A1 (en) | 2010-09-10 | 2011-06-30 | Object which can be authenticated and which contains a cover masking an authenticating pattern |
Country Status (4)
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US (1) | US20130163828A1 (en) |
EP (1) | EP2613947A1 (en) |
FR (1) | FR2964596B1 (en) |
WO (1) | WO2012031795A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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GB201015417D0 (en) * | 2010-09-15 | 2010-10-27 | Lomox Ltd | Organic light emitting diode devices |
CN107438514B (en) * | 2015-01-22 | 2019-10-18 | 光学转变公司 | Optical goods with luminescence generated by light label |
US10417409B2 (en) * | 2017-03-21 | 2019-09-17 | Hid Global Corp. | Securing credentials with optical security features formed by quasi-random optical characteristics of credential substrates |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2236718A (en) * | 1939-07-10 | 1941-04-01 | Meyercord Co | Decorative article and coating for producing the same |
AU547881B2 (en) * | 1981-01-08 | 1985-11-07 | Securicard Systems Ltd. | Identification of articles |
DE69832574T2 (en) | 1997-07-29 | 2006-06-14 | Nhk Spring Co Ltd | Optical identification system with cholesteric liquid crystals |
DE19737612A1 (en) | 1997-08-28 | 1999-03-04 | Consortium Elektrochem Ind | Machine-detectable security marking, production of the security marking and security system that cannot be recognized by the eye and encompass this security marking |
JP2000090229A (en) | 1998-07-13 | 2000-03-31 | Minolta Co Ltd | Information recording and display card and information recording and display system using the same |
EP1151420A1 (en) * | 1999-12-10 | 2001-11-07 | Japan Cash Machine Co., Ltd. | Valuable paper distinguishable by a validator for discriminating bills |
EP1768792A1 (en) * | 2004-06-21 | 2007-04-04 | Ferro Corporation | Methods of forming and detecting non-visible marks and articles marked in accordance with the methods |
US7990515B2 (en) * | 2004-12-10 | 2011-08-02 | Industrial Technology Research Institute | Bistable display |
DE102005031448A1 (en) * | 2005-07-04 | 2007-01-11 | Polyic Gmbh & Co. Kg | Activatable optical layer |
-
2010
- 2010-09-10 FR FR1057187A patent/FR2964596B1/en not_active Expired - Fee Related
-
2011
- 2011-06-30 EP EP11728838.1A patent/EP2613947A1/en not_active Withdrawn
- 2011-06-30 WO PCT/EP2011/060998 patent/WO2012031795A1/en active Application Filing
-
2013
- 2013-02-26 US US13/777,039 patent/US20130163828A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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See references of WO2012031795A1 * |
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US20130163828A1 (en) | 2013-06-27 |
FR2964596A1 (en) | 2012-03-16 |
WO2012031795A1 (en) | 2012-03-15 |
FR2964596B1 (en) | 2013-08-30 |
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