FR2755902A1 - Marking procedure for use with merchandise liable to be fraudulently copied - Google Patents

Marking procedure for use with merchandise liable to be fraudulently copied Download PDF

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Publication number
FR2755902A1
FR2755902A1 FR9614488A FR9614488A FR2755902A1 FR 2755902 A1 FR2755902 A1 FR 2755902A1 FR 9614488 A FR9614488 A FR 9614488A FR 9614488 A FR9614488 A FR 9614488A FR 2755902 A1 FR2755902 A1 FR 2755902A1
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FR
France
Prior art keywords
marking
laser
luminescence
laser beam
modification
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9614488A
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French (fr)
Other versions
FR2755902B1 (en
Inventor
Petra Baumeister
Alain Catherinot
Jacques Aubreton
Frederic Kowalski
Dominique Faure
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SARL IND LASER PARTNER
Original Assignee
SARL IND LASER PARTNER
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Publication date
Application filed by SARL IND LASER PARTNER filed Critical SARL IND LASER PARTNER
Priority to FR9614488A priority Critical patent/FR2755902B1/en
Publication of FR2755902A1 publication Critical patent/FR2755902A1/en
Application granted granted Critical
Publication of FR2755902B1 publication Critical patent/FR2755902B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/126—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by photographic or thermographic registration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/262—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used recording or marking of inorganic surfaces or materials, e.g. glass, metal, or ceramics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)

Abstract

The procedure for marking objects includes a process of directing a laser beam at the surface to be marked, with the laser beam following a predetermined profile in the marking zone. The profile corresponds to a particular marking design or motif to be recorded. The laser beam is able to alter the structure of the molecules in the first atomic layers of the structure of the material. It produces a modification which is invisible to the naked eye, but which produces a luminescence phenomena when the surface is illuminated by an electromagnetic beam which is specifically selected to reveal the marking. The radiation used is from an excimer laser, producing luminescence within the visible spectrum when used to illuminate the surface.

Description

PROCEDE DE REALISATION, SUR UN PRODUIT, D'UN MARQUAGE
INVISIBLE, POUVANT ETRE REVELE
La présente invention concerne le marquage de produits à l'aide d'un laser afin de réaliser une marque invisible dans le spectre du visible, pouvant être révélé dans certaines conditions afin de permettre une identification de provenance et de lutter contre la reproduction illicite de ces produits.PROCESS FOR PRODUCING A MARKING ON A PRODUCT
INVISIBLE, CAN BE REVEALED
The present invention relates to the marking of products using a laser in order to produce an invisible mark in the visible spectrum, which can be revealed under certain conditions in order to allow an identification of source and to fight against the illegal reproduction of these products.

On connaît la demande de brevet français FR-A-2 665 855 concernant un marquage sous-jacent. We know the French patent application FR-A-2 665 855 concerning an underlying marking.

Dans cette demande, le procédé prévoit de diriger au niveau d'une surface du corps à marquer un faisceau à densité d'énergie élevée, en l'occurrence un laser, en un point de focalisation situé dans l'épaisseur du produit, afin de provoquer une ionisation localisée de la matière en ce point de focalisation. In this application, the method provides for directing at a surface of the body to mark a beam with high energy density, in this case a laser, at a focal point located in the thickness of the product, in order to cause a localized ionization of the material at this focal point.

Plus particulièrement, ce procédé s'applique aux bouteilles en matériau transparent, verre ou matière plastique clair ou fumé, ce qui permet de voir le marquage par transparence, le marquage apparaissant à l'oeil nu comme une zone opacifiée. Aucun changement en surface ne peut être détecté au toucher, ce qui interdit la suppression par des moyens mécaniques tels qu'un ponçage ou l'adjonction en surface par collage d'une pastille ressemblant au motif réalisé dans l'épaisseur de la matière. More particularly, this process applies to bottles made of transparent material, glass or clear or smoked plastic material, which makes it possible to see the marking by transparency, the marking appearing to the naked eye as an opacified zone. No change in surface can be detected by touch, which prohibits removal by mechanical means such as sanding or adding to the surface by bonding a pad resembling the pattern made in the thickness of the material.

Le dispositif comprend un laser du type Nd-YAG dont le rayonnement à 1,06,ut est invisible à l'oeil nu, combiné avec un laser de faible puissance travaillant dans le rayonnement visible, ce qui facilite les tirs et les positionnements. The device comprises a laser of the Nd-YAG type whose radiation at 1.06, ut is invisible to the naked eye, combined with a low power laser working in visible radiation, which facilitates the firing and the positioning.

Des moyens de pilotage avec des miroirs permettent de diriger le faisceau et de réaliser des motifs de formes données. Piloting means with mirrors make it possible to direct the beam and to produce patterns of given shapes.

Ce type d'agencement permet la réalisation d'un marquage sous-jacent indélébile et non reproductible mais ce marquage, visible à l'oeil nu, ne présente pas la discrétion souhaitée par les fabriquants surtout lorsqu'il s'agit de produits de haut de gamme ou de produits de grande importance nécessitant des contrôles très pointus comme les médicaments. This type of arrangement allows the realization of an indelible and non-reproducible underlying marking, but this marking, visible to the naked eye, does not have the discretion desired by manufacturers, especially when it comes to high-quality products. range or products of great importance requiring very specific controls such as drugs.

On connaît aussi par la demande de brevet WO-A-9 001 418, un procédé de marquage de verre feuilleté dans lequel, à l'aide d'un faisceau laser, on vient modifier la couche d'une feuille de matériau organique interposée entre les feuilles de verre. Cette couche peut être carbonisée ou modifiée dans son aspect par la réalisation de bulles localement, dans l'ensemble de la zone de tir, ce qui constitue un marquage visible à l'oeil nu. Also known from patent application WO-A-9 001 418 is a method of marking laminated glass in which, using a laser beam, the layer of a sheet of organic material is interposed between the glass sheets. This layer can be charred or modified in its appearance by producing bubbles locally, throughout the shooting zone, which constitutes a marking visible to the naked eye.

La présente invention propose de pallier ces inconvénients en utilisant un dispositif permettant la réalisation d'un marquage indélébile mais invisible à l'oeil nu, sans aspérités en surface détectables au toucher, pouvant être révélé par un éclairage d'une longueur d'onde appropriée et dictée par la longueur d'onde des moyens de réalisation du marquage. La révélation assure la mise en luminescence du marquage. The present invention proposes to overcome these drawbacks by using a device allowing the realization of an indelible marking but invisible to the naked eye, without surface roughness detectable to the touch, which can be revealed by lighting of an appropriate wavelength and dictated by the wavelength of the means for carrying out the marking. The revelation ensures the luminescence of the marking.

De plus, ce marquage peut être réalisé sur tout matériau, verre, matières plastiques ou carton, il suffit pour cela d'adapter la puissance du tir. In addition, this marking can be performed on any material, glass, plastics or cardboard, it suffices to adapt the power of the shot.

A cet effet, selon l'invention, le procédé de réalisation d'un marquage indélébile d'un produit au moyen d'un rayonnement laser, consiste à réaliser un tir au moyen du rayonnement laser sur la zone à marquer suivant un profil déterminé correspondant au motif de marquage, avec des paramètres adaptés pour provoquer une modification de structure des premières couches atomiques du matériau dans lequel est réalisé le produit, invisible à l'oeil nu, cette modification étant susceptible de provoquer un phénomène de luminescence sous un éclairage par un faisceau électromagnétique adapté révélant ledit marquage. To this end, according to the invention, the method of producing an indelible marking of a product by means of laser radiation, consists in carrying out a shot by means of laser radiation on the zone to be marked according to a corresponding determined profile. to the marking pattern, with parameters suitable for causing a modification of the structure of the first atomic layers of the material in which the product is made, invisible to the naked eye, this modification being capable of causing a phenomenon of luminescence under lighting by a adapted electromagnetic beam revealing said marking.

Plus particulièrement, le phénomène de luminescence est émis dans le spectre du visible. More particularly, the phenomenon of luminescence is emitted in the visible spectrum.

Quant au laser utilisé, c'est un laser à excimères. As for the laser used, it is an excimer laser.

L'invention est décrite ci-après selon un mode de réalisation particulier, non limitatif. The invention is described below according to a particular, non-limiting embodiment.

L'invention consiste à recourir à l'utilisation d'un laser à excimères pour réaliser le marquage recherché. The invention consists in resorting to the use of an excimer laser to achieve the desired marking.

Un laser à excimère est un générateur de lumière cohérente, monochromatique qui émet un rayonnement électromagnétique polarisé ou non dans la bande spectrale de l'ultraviolet. An excimer laser is a coherent, monochromatic light generator which emits electromagnetic radiation polarized or not in the spectral band of the ultraviolet.

Chaque photon émis par un tel laser véhicule une énergie importante de l'ordre de 3,53 Ev à 351 nm à 6,42 Ev à 193 nm. Each photon emitted by such a laser carries a significant energy of the order of 3.53 Ev at 351 nm to 6.42 Ev at 193 nm.

Les variations de longueur d'onde émise sont obtenues par les combinaisons de gaz utilisés qui sont des mélanges de gaz rares et d'halogènes. The variations in wavelength emitted are obtained by the combinations of gases used which are mixtures of rare gases and halogens.

Ainsi on obtient les résultats de longueur d'ondes suivants en fonction des différents mélanges:
- ArF : 1 93 nm,
- KrCI :22 nm,
- KrF : 248 nm,
- XeCI : 308 nm, et
- XeF : 351 nm.The following wavelength results are obtained according to the different mixtures:
- ArF: 1 93 nm,
- KrCI: 22 nm,
- KrF: 248 nm,
- XeCI: 308 nm, and
- XeF: 351 nm.

Suivant la longueur d'onde utilisée, on peut déterminer le seuil d'ablation de chaque matériau. Ce seuil est l'ensemble des valeurs de puissance, de durée, de focalisation, au-delà duquel il y a perte de matière. Depending on the wavelength used, the ablation threshold for each material can be determined. This threshold is the set of power, duration, focus values, beyond which there is loss of material.

En deçà de ce seuil, la focalisation d'une telle énergie provoque néanmoins des modifications de structure ou des modifications de répartition énergétique au niveau atomique, mais sans modification physique apparente du matériau.  Below this threshold, the focusing of such energy nevertheless causes structural modifications or modifications in energy distribution at the atomic level, but without any apparent physical modification of the material.

De telles modifications s'opèrent sur les premières couches atomiques, si bien que l'on peut dire que le marquage est indélébile mais qu'il reste néanmoins en surface, contrairement aux procédés de l'art antérieur. Such modifications take place on the first atomic layers, so that it can be said that the marking is indelible but that it nevertheless remains on the surface, unlike the methods of the prior art.

De ce fait, I'application n'est pas limitée aux matériaux transparents et le matériau marqué peut être du verre, de la céramique, des matières plastiques mais aussi du carton ou des étiquettes. Therefore, the application is not limited to transparent materials and the marked material can be glass, ceramic, plastics but also cardboard or labels.

De façon connue, le dispositif de tir comprend des moyens de pilotage du faisceau laser mais ce dispositif ne présente pas de caractéristiques particulières. In known manner, the firing device comprises means for controlling the laser beam, but this device does not have any particular characteristics.

Le produit peut être soit mobile sur une table à mouvements croisés, pilotée par une commande numérique, elle-même reliée à un poste de dessin assisté par ordinateur, soit fixe et le faisceau est alors dirigé par un système dit "à miroirs galvanométriques". The product can either be mobile on a table with crossed movements, controlled by a numerical control, itself connected to a drawing station assisted by computer, or fixed and the beam is then directed by a system known as "with galvanometric mirrors".

Le système de lecture est dépendant des paramètres du tir. En effet, le faisceau d'irradiation électromagnétique émis doit engendrer un phénomène de luminescence du marquage, cette réémission se situant dans le spectre du visible. The reading system is dependent on the shooting parameters. Indeed, the electromagnetic radiation beam emitted must generate a phenomenon of luminescence of the marking, this re-emission being located in the visible spectrum.

Par exemple sur un produit du type emballage cosmétique, enveloppé d'un film en polypropylène transparent, on a réalisé un tir avec un laser à excimères à 248 nm, pendant 0,2 secondes et avec une énergie de 120 mj sur une surface de 1,6 cm2. For example, on a product of the cosmetic packaging type, wrapped in a transparent polypropylene film, a shot was made with an excimer laser at 248 nm, for 0.2 seconds and with an energy of 120 mj on a surface of 1 , 6 cm2.

Le système de lecture convenable comprend un appareil d'éclairage qui génère un rayonnement de longueur d'onde comprise entre 180 et 354 nm et l'éclairage du marquage ainsi réalisé par ce type de faisceau révèle le marquage en provoquant un phénomène de luminescence sur la totalité de la surface marquée. The suitable reading system includes a lighting device which generates radiation of wavelength between 180 and 354 nm and the lighting of the marking thus produced by this type of beam reveals the marking by causing a phenomenon of luminescence on the entire marked area.

Un tel procédé est très attractif car le marquage est invisible pour tout un chacun et ne peut être révélé que par des moyens adaptés et spécifiques du marquage si bien que les marquages frauduleux sont impossibles à réaliser sauf à connaître les paramètres du tir ayant permis la réalisation du marquage.  Such a process is very attractive because the marking is invisible to everyone and can only be revealed by suitable and specific means of marking so that fraudulent markings are impossible to perform unless you know the parameters of the shot that allowed the achievement of the marking.

Claims (3)

REVENDICATIONS 1. Procédé de réalisation d'un marquage indélébile d'une zone d'un produit au moyen d'un tir d'un rayonnement laser sur la zone à marquer suivant un profil déterminé correspondant au motif de marquage, avec des paramètres adaptés pour provoquer une modification de structure des premières couches atomiques du matériau du produit, invisible à l'oeil nu, cette modification étant susceptible de provoquer un phénomène de luminescence sous un éclairage par un faisceau électromagnétique adapté révélant ledit marquage. 1. Method for producing an indelible marking of a zone of a product by means of a laser beam firing on the zone to be marked according to a determined profile corresponding to the marking pattern, with parameters suitable for causing a modification of the structure of the first atomic layers of the product material, invisible to the naked eye, this modification being capable of causing a phenomenon of luminescence under lighting by a suitable electromagnetic beam revealing said marking. 2. Procédé selon la revendication 1, caractérisé en ce que le phénomène de luminescence est émis dans le spectre du visible. 2. Method according to claim 1, characterized in that the phenomenon of luminescence is emitted in the visible spectrum. 3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le rayonnement laser est émis par un laser à excimères.  3. Method according to claim 1 or 2, characterized in that the laser radiation is emitted by an excimer laser.
FR9614488A 1996-11-20 1996-11-20 PROCESS FOR PRODUCING, ON A PRODUCT, AN INVISIBLE MARKING, WHICH CAN BE REVEALED Expired - Fee Related FR2755902B1 (en)

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FR9614488A FR2755902B1 (en) 1996-11-20 1996-11-20 PROCESS FOR PRODUCING, ON A PRODUCT, AN INVISIBLE MARKING, WHICH CAN BE REVEALED

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FR9614488A FR2755902B1 (en) 1996-11-20 1996-11-20 PROCESS FOR PRODUCING, ON A PRODUCT, AN INVISIBLE MARKING, WHICH CAN BE REVEALED

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FR2755902A1 true FR2755902A1 (en) 1998-05-22
FR2755902B1 FR2755902B1 (en) 1999-02-12

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021061A1 (en) * 1997-10-16 1999-04-29 Montres Rolex S.A. Watch crystal provided with a mark and watch comprising same
NL1015686C2 (en) * 2000-07-12 2002-01-15 Dsm Nv Method for irreversibly applying laser irradiation of a marking on a polymer molded part to the naked eye.
EP1839277A1 (en) * 2004-12-15 2007-10-03 Basf Aktiengesellschaft Method for checking the authenticity of goods
FR2909922A1 (en) * 2006-12-14 2008-06-20 Att Advanced Track & Trace Sa Object and material marking method for use in package of e.g. watch, involves marking surface and core of zone of material with laser for representing code on zone so that zone is imperceptible to naked eye
EP2292329A1 (en) * 2009-09-08 2011-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Polymer substrate with fluorescent structure, method for production of same and application of same
WO2011076230A1 (en) * 2009-12-22 2011-06-30 Aktiebolaget Skf Method of laser marking a bearing component with visually undetectable mark; bearing component with such marking; method of authentification such marking
WO2013048714A1 (en) 2011-09-29 2013-04-04 Spectra Systems Corporation Methods and systems for authenticating and tracking objects
FR2995241A1 (en) * 2012-09-13 2014-03-14 Commissariat Energie Atomique METHOD FOR LUMINOUS MARKING OF A LASER SINTERED SUBSTRATE
WO2020201098A1 (en) * 2019-04-02 2020-10-08 Kookaburra Method for the concealed marking of a support associated with a product

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695234A1 (en) * 1992-08-26 1994-03-04 Gemplus Card Int Method of marking a smart card
US5401960A (en) * 1992-12-04 1995-03-28 Borus Spezialverfahren Und -Gerate Im Sondermaschinenbau Gmbh Process for marking an article

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695234A1 (en) * 1992-08-26 1994-03-04 Gemplus Card Int Method of marking a smart card
US5401960A (en) * 1992-12-04 1995-03-28 Borus Spezialverfahren Und -Gerate Im Sondermaschinenbau Gmbh Process for marking an article

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999021061A1 (en) * 1997-10-16 1999-04-29 Montres Rolex S.A. Watch crystal provided with a mark and watch comprising same
NL1015686C2 (en) * 2000-07-12 2002-01-15 Dsm Nv Method for irreversibly applying laser irradiation of a marking on a polymer molded part to the naked eye.
WO2002004223A1 (en) * 2000-07-12 2002-01-17 Dsm N.V. Irreversible application of an invisible marking to polymer mouldings
EP1839277A1 (en) * 2004-12-15 2007-10-03 Basf Aktiengesellschaft Method for checking the authenticity of goods
FR2909922A1 (en) * 2006-12-14 2008-06-20 Att Advanced Track & Trace Sa Object and material marking method for use in package of e.g. watch, involves marking surface and core of zone of material with laser for representing code on zone so that zone is imperceptible to naked eye
WO2008093006A2 (en) * 2006-12-14 2008-08-07 Advanced Track & Trace Method and device for marking objects and materials
WO2008093006A3 (en) * 2006-12-14 2009-05-14 Advanced Track & Trace Method and device for marking objects and materials
US8345076B2 (en) 2006-12-14 2013-01-01 Advanced Track And Trace Method and device for marking objects and materials
EP2292329A1 (en) * 2009-09-08 2011-03-09 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Polymer substrate with fluorescent structure, method for production of same and application of same
US9597688B2 (en) 2009-09-08 2017-03-21 Ibidi Gmbh Polymer substrate with fluorescent structure, method for the production thereof and the use thereof
CN102770231B (en) * 2009-12-22 2015-06-03 Skf公司 Method of laser marking a bearing component with visually undetectable mark, bearing component having the mark and method for indentifying the mark
US8796584B2 (en) 2009-12-22 2014-08-05 Aktiebolaget Skf Method of manufacturing a bearing component with visually undetectable mark; bearing component with such marking; method of authentification such marking
WO2011076230A1 (en) * 2009-12-22 2011-06-30 Aktiebolaget Skf Method of laser marking a bearing component with visually undetectable mark; bearing component with such marking; method of authentification such marking
CN103843013A (en) * 2011-09-29 2014-06-04 光谱***公司 Methods and systems for authenticating and tracking objects
WO2013048714A1 (en) 2011-09-29 2013-04-04 Spectra Systems Corporation Methods and systems for authenticating and tracking objects
EP2761538A4 (en) * 2011-09-29 2015-08-12 Spectra Systems Corp Methods and systems for authenticating and tracking objects
CN103843013B (en) * 2011-09-29 2017-05-10 光谱***公司 Methods and systems for authenticating and tracking objects
EP3657395A1 (en) * 2011-09-29 2020-05-27 Spectra Systems Corporation Methods and systems for authenticating and tracking objects
FR2995241A1 (en) * 2012-09-13 2014-03-14 Commissariat Energie Atomique METHOD FOR LUMINOUS MARKING OF A LASER SINTERED SUBSTRATE
WO2014041264A1 (en) * 2012-09-13 2014-03-20 Commissariat A L'energie Atomique Et Aux Energies Alternatives Method for the luminescent marking of a substrate by laser sintering
WO2020201098A1 (en) * 2019-04-02 2020-10-08 Kookaburra Method for the concealed marking of a support associated with a product
FR3094800A1 (en) * 2019-04-02 2020-10-09 Kookaburra CONCEALED MARKING PROCESS OF A SUPPORT ASSOCIATED WITH A PRODUCT

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