EP3291994A1 - Dispositif de personnalisation et procédé de personnalisation d'un document - Google Patents

Dispositif de personnalisation et procédé de personnalisation d'un document

Info

Publication number
EP3291994A1
EP3291994A1 EP16723051.5A EP16723051A EP3291994A1 EP 3291994 A1 EP3291994 A1 EP 3291994A1 EP 16723051 A EP16723051 A EP 16723051A EP 3291994 A1 EP3291994 A1 EP 3291994A1
Authority
EP
European Patent Office
Prior art keywords
document
pixels
graphic
pixel
geometric shape
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
EP16723051.5A
Other languages
German (de)
English (en)
Other versions
EP3291994B1 (fr
Inventor
Roland Dr. Gutmann
Ralf Grieser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bundesdruckerei GmbH filed Critical Bundesdruckerei GmbH
Publication of EP3291994A1 publication Critical patent/EP3291994A1/fr
Application granted granted Critical
Publication of EP3291994B1 publication Critical patent/EP3291994B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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

Definitions

  • the invention relates to a Personal Deutschensvorrtchtung for personalization of a document with a graphic and a method for personalizing a document by applying a graphic with such Personaltechnischsvorrlchtung.
  • a graphic such as a portrait of the document holder can be applied to the document for this purpose.
  • the technique of laser engraving has proven itself. It will be in the document blank color pigments or pigments of different shades of gray produced by bombardment of a photosensitive material with laser light. In the photosensitive material, a material conversion takes place, whereby individual pixels can be generated at the point of impact of the laser.
  • a graphic by laser engraving a graphic can first be rasterized, with the individual pixels of the graphic subsequently being transmitted to the document by individual laser pulses or a sequence of laser pulses.
  • a polycarbonate layer or a polyvinyl chloride may be applied to the document, which is admixed with an additive which consists essentially of carbon chains. If this layer is now bombarded with a laser pulse, individual Moiekülketten can break open and carbon are released. This manifests itself in a blackening of the layer in the region of the region hit by the laser pulse. In general, the generated gray level depends on the pulse energy.
  • DE 10 2010 010 072 A1 discloses a device for marking value or security documents, in which a document body is provided having different colored areas by iteratively positioning the focus of a laser on or in the document body and irradiating the laser light selectively locally changes the color of one or more of the areas, so that the document body subsequently causes a multi-colored color impression upon irradiation with white light for a human observer.
  • a "document” may be understood to mean paper-based and / or plastic-based documents, such as identity documents, in particular passports, identity cards, visas and driving licenses, vehicle registration documents, vehicle registration documents, company identity cards , Health cards or other ID documents as well as chip cards, means of payment, in particular banknotes, bank cards and credit cards, bills of lading or other credentials.
  • a "document” is understood to mean, in particular, a portable electronic device which has at least one data memory for storing an attribute and a communication interface for reading out the attribute.
  • the document has a secure memory area for storing the at least one attribute in order to prevent that the attribute stored in the memory area is altered in an unauthorized manner or read out without the authorization required for this purpose.
  • the invention in a first aspect, relates to a personalization device having an optical arrangement and a beam source for generating laser pulses.
  • the personalization device is designed to personalize a document with a graphic by means of the laser pulses.
  • the graphic includes a plurality of pixels.
  • the personalization device is therefore designed to image the pixels of the graphic as pixels by applying a photosensitive layer of the document with the laser pulses to the document to produce an image of the graphic on the document.
  • the laser pulses are generated by the personalization device such that a first subset of pixels from the plurality of pixels after imaging on the document has a first geometric shape, while at least a second subset of pixels from the plurality of pixels after imaging on the document geometric shape, which differs from the first geometric shape.
  • the device is designed to direct laser pulses generated by the beam sources through the optical arrangement of the personalization device to the position of a pixel.
  • the optical arrangement is designed to adapt the transverse intensity profile of the laser pulse of the respective geometric shape of the pixel.
  • the beam source of the personalization device is preferably a pulsed laser source.
  • this pulsed gas laser, dye laser or solid state laser can be used.
  • the energy of a laser pulse generated by the beam source is sufficiently large to produce a pixel in the photosensitive layer of the document.
  • the laser source must be capable of delivering laser light of a wavelength suitable for producing pixels in the photosensitive layer of the document.
  • Embodiments could have the advantage that the adjustment of the transverse intensity profile of the laser pulse to a desired geometric shape of the pixel to be generated at different points of the imaged graphic pixels can be generated, which in their geometric shape of the usually round pixels of a laser engraved image differ. In this case, such a geometric shape due to the manipulated Intensity profiles of the laser pulse by a single laser pulse or a sequence of identical laser pulses are generated on the document.
  • Such a targeted variation of the geometric shape of the pixels produced on the document could be used to secure the forgery of the document.
  • a laser engraved graphic can be manipulated essentially by adding pixels or by additionally blackening existing pixels.
  • pixels subsequently added to a graphic have a round shape because a round intensity profile can be more easily generated in a laser than another defined geometric shape, such as a rectangle or a line.
  • another defined geometric shape such as a rectangle or a line.
  • the optical arrangement includes a bundle of photoconductive fibers and a coupling optics for coupling a laser pulse into the photoconductive fibers.
  • a pixel is then composed of a plurality of sub-pixels, the geometric shape of the pixel being determined by the arrangement of the sub-pixels, the light-conducting fibers being adapted to image the sub-pixels of the pixel by imaging the laser pulse on the document to create.
  • a subpixel is preferably generated by the laser pulse coupled out of a single fiber on the document.
  • the light conductive fibers may be, for example, hollow core fibers or silica glass full glass fibers.
  • an array of lenses can be used, which focuses an incident radiation on the fiber facets of the individual fibers of the fiber bundle.
  • Embodiments could have the advantage that the ends of the light-conducting fibers of the fiber bundle, at which the incident laser light emerges from the fibers, could easily be aligned with different points of the document or picture elements of the graphic.
  • a rasterized graphic can be transferred to a document in a simple manner by aligning the fiber ends of the fiber bundle successively with the individual pixels of the graphic to be applied.
  • a coupling optics matched to the fiber bundle can greatly increase the efficiency with which the incident laser light is coupled into the fibers.
  • the bundle of photoconductive fibers is an image-receiving optical fiber bundle.
  • an image-retaining optical fiber bundle is understood as an optical fiber bundle which is capable of faithfully reproducing the transverse intensity profile of an incident laser pulse onto the surface of the document following propagation of the laser pulse along the optical fiber bundle.
  • Embodiments could have the advantage that the geometric shape of the pixel to be generated can already be determined before the coupling into the light-conducting fibers.
  • the beam source can be made by suitable optics to emit laser pulses in a particular transverse electromagnetic mode. It is possible to produce a transverse intensity profile which deviates significantly from the usual round shape of a laser pulse in a mixture of different transverse electromagnetic modes. This intensity profile could then be imaged onto the pixel of the document by the fibers of the image-retaining optical fiber bundle To produce pixel with a defined geometric shape, which differs from the usually round shape of a pixel.
  • the device includes at least one mask with at least one opening.
  • the mask is arranged between the beam source and the optical arrangement.
  • the shape of the at least one opening of the mask corresponds to the geometric shape of the image point to be generated on the document.
  • the mask could be a blackened metal plate provided with a plurality of recesses.
  • the mask could be placed close to the fiber facets of the fiber bundle so that the openings of the mask coincide with individual fibers of the bundle of photoconductive fibers. If a laser pulse generated by the beam source then strikes the mask, laser light is coupled only into the fibers of the fiber bundle, the facet of which is in registration with an opening in the mask. Thus, by the mask, a coupling of laser pulses into certain fibers of the fiber bundle can be prevented.
  • the mask can also be an electromechanical mask.
  • a projection device can be arranged between the beam source and the optical arrangement, which uses electromechanical components to image a round laser pulse onto the fiber facets of individual fibers of the optical arrangement.
  • an arrangement of a plurality of movable micromirrors can be used.
  • a selective illumination of individual fibers of the optical arrangement can be achieved.
  • the individual micromirrors are controllable in their orientation by an electromechanical suspension.
  • Embodiments of the invention may have the advantage that by using a mask which excludes certain fibers of the fiber bundle from illumination by the laser pulse or which only illuminates certain fibers of the fiber bundle, a pattern can be easily produced can be burned by imaging the fiber ends on the photosensitive layer of the document in the pixel of the graph.
  • the mask used can be adapted accordingly for various desired geometric shapes of a pixel to be generated.
  • the fiber bundle and its input and output optics can remain the same for all masks.
  • the at least one mask is arranged in a magazine, wherein the magazine is adapted to position or remove a mask between the beam source and the fiber bundle.
  • Embodiments could have the advantage that by using masks, which are arranged in a magazine, a fast switching between different geometric shapes of the generated pixels is possible. For example, a new mask can be placed in front of the facet of the fiber bundle for each individual pixel so that the pixel of the graphic generated with the next laser pulse receives the geometric shape defined by the mask.
  • the ends of the optical fibers of the fiber bundle are arranged in a plane in the form of the geometric shape of the pixel.
  • an initially round fiber bundle could be arranged so that the ends of the photoconductive fibers form a cross shape or circular shape or a rectangular shape in a plane.
  • Embodiments could have the advantage that by appropriately arranging the photoconductive fibers, all the fibers can contribute to the formation of the pixel.
  • the embodiment is characterized by a low power loss, since almost all the laser energy, which is coupled into the fibers, is also used to generate the pixel.
  • the optical arrangement further comprises imaging optics for imaging the fiber ends on the document.
  • the coupling optics, the fiber bundle and the imaging optics are monolithic.
  • U.N- a monolithic design is understood to mean an embodiment in which the relative position of the coupling optics to the fiber facets of the fiber bundle and the relative position of the imaging optics to the fiber ends of the fiber bundle are fixed and can not be changed.
  • Embodiments could have the advantage that the optical arrangement only has to be adjusted once and then the adjustment of the coupling optics and the imaging optics can be maintained for all further uses of the optical arrangement.
  • the coupling-in optics can be adjusted such that a co-located laser pulse with the greatest possible coupling-in efficiency is coupled into the fibers of the fiber bundle.
  • the imaging optics can then be placed in front of the fiber ends of the fiber bundle such that they image the laser pulses coupled out of the fibers with a defined size onto the surface of the document for a defined distance between the imaging optics and the document surface. Overall, the handling of the personalization device can thus be simplified.
  • a pixel of the graphic is imaged onto the document as a pixel by exposing the photosensitive layer of the document to a single laser pulse.
  • the amount of energy that is introduced by the laser pulse into the document must be adjusted so that the pixel produced has the desired gray level or brightness level.
  • Embodiments could have the advantage that by generating a pixel by a single laser pulse, rapid generation of the graphics can be ensured, provided that the beam source can be switched quickly in its output power. Furthermore, it could be ensured that the geometric shape of the generated pixel with respect to a pixel, which was generated by a sequence of laser pulses, is not blurred by any vibrations within the personalization device.
  • a pixel of the graphic is imaged by impinging the photosensitive layer of the document with a plurality of laser pulses on the document as a pixel, each of the laser pulses introducing the same amount of energy into the photosensitive layer of the document.
  • Embodiments could have the advantage that one does not have to switch the laser or the beam source between the generation of pixels of different brightness in its output power. Rather, the same pulse energy can always be used for each pixel regardless of its gray level. The gray level would be defined only by the number of laser pulses delivered to the pixel.
  • the invention relates to a method for personalizing a document by applying a graphic with a personalization device as described above with the steps
  • the pixels of the graphic on the document comprise a color of a plurality of color values.
  • the color values are each assigned a geometric shape of the pixel.
  • the pixels of the graphic on the document on a gray value of a plurality of gray values, wherein the gray values each associated with a geometric shape of the pixel.
  • FIG. 1 shows a schematic illustration of a graphic in which individual pixels are realized by pixels with a defined geometric shape
  • Figure 2 is a schematic representation of a personalization device for
  • Figure 3 is a schematic representation of an alternative personalization device with an imaging mask.
  • FIG. 1 shows a schematic representation of a graphic 100 which can be applied to a document 102 (not shown here) for personalization purposes.
  • the graphic 100 is a passport photograph in the embodiment shown here.
  • a fingerprint of the document holder could also be applied to the document 102 in an analogous method.
  • the output graphic is first rasterized.
  • FIG. 1 shows by way of example a detail 104 from the graph 100 after the raster process with an enlarged representation. It is a field of size 8 x 8 pixels from the area of the pupil of the right eye. As can be clearly seen in the section 104, the individual pixels 106 of the image section are assumed to be round pixels. This is due to the fact that laser pulses with a round transverse intensity distribution are usually used in particular when transferring a graphic 100 to a document 102 by means of laser engraving.
  • Such a round profile can be easily generated by superposition of a plurality of transverse electromagnetic modes.
  • the graphic 100 can then be imaged on the surface of the document 102 in good approximation to the original graphic.
  • the pixels 106 or at least a subset of the individual pixels 106 of the graphic 100 applied to the document have a substructure or geometric shape deviating from a round shape from sub-pixels 108.
  • two pixels 110 and 12 are selected and enlarged in FIG. 1 from the bottom row of pixels from the cutout 104.
  • the pixel 110 is made up of 13 sub-pixels 108.
  • the sub-pixels 108 are arranged within the pixel 10 in a defined geometric pattern or a geometric shape.
  • the brightness or gray value of the sub-pixels 108 of the pixel 110 corresponds to the brightness or gray-scale value of the pixel 110 shown in the detail 104.
  • a pixel in the sense of the invention is a part of the output graphic 100, which is loaded into the personalization device (200).
  • the pixels of the source graphic 100 are then mapped onto the document 102, with a pixel 106 being created on the document 102 for each pixel.
  • inventions According to the invention, such a pixel 106 is again constructed from sub-pixels 108, the sub-pixels 108 resulting in the geometric shape of the pixel 106 on the document 102. If a pixel 106 were subsequently blackened in a graphic 100 in which the pixels are constructed from a geometrical arrangement of subpixels, or an additional pixel inserted, this would normally be done by applying a laser pulse to the document or the photosensitive layer has a round intensity profile.
  • a pixel 106 within a laser-engraved graphic 100 has a size of, for example, 0.1 mm.
  • the sub-pixels 108 in the embodiment shown here may, for example, have a size of not more than 20 ⁇ m. Since the substructure can not be resolved by the human eye in a graphic element which has a substructure of sub-pixels 08 on the order of a few 10 ⁇ m, a pixel 106 appears to a viewer like a uniformly colored pixel. However, it is possible to visualize the substructure of a pixel 106 by magnification, for example with a magnifying glass, in order to control the graphics for subsequent manipulations.
  • the geometric shape or the arrangement of the sub-pixels 08 of the pixel 12 deviates from the geometric shape of the pixel 110.
  • the brightness of the sub-pixels 08 is equal to the brightness of the pixel, which is shown in the enlarged section 104.
  • the sub-pixels 108 of a pixel 106 have the same level of awareness as the desired pixel 106
  • all the sub-pixels 108 to have a uniform black value, wherein a specific brightness level was perceived by suitably selecting the density of sub-pixels 108 within a pixel 106 by a viewer of the pixel due to the limited resolving power of the human eye becomes.
  • an assignment of the brightness level of a pixel to the geometric shape or arrangement of the sub-pixels 108 of a pixel 106 would be realized.
  • FIG. 2 a is a schematic representation of a personalization device 200 for personalizing a document 102 with a graphic 100 (not shown here).
  • the personalization device 200 essentially consists of a beam source 202 and an optical arrangement 204.
  • the beam source 202 can be, for example, a pulsed solid-state laser system, such as a Nd.YAG laser or a Ti: Sa laser or a (fiber-reinforced diode laser (S The optical arrangement 204 is constructed in the embodiment shown in Figure 2 a) from a collimating optics 206 and a fiber bundle 208 and an imaging optics 210.
  • the following will be now explains how a generated by the beam source 202 laser pulse for generating a pixel 106 is imaged on the document 102.
  • a single laser pulse is first generated by the beam source 202.
  • a laser pulse may be a light pulse of pulse energy between 0.01 mJ and 1 mJ and a pulse width of about 3 ns to 250 ns. In this case, such a pulse peak powers of about 10 kW to 50 kW.
  • the wavelength of the light emitted in this case must be adapted to the requirements of the photosensitive layer of the document 102. In the case of laser engraving processes, wavelengths in the near infrared are usually approximately at 1064 nm.
  • the light pulse thus generated by the beam source 202 is first expanded and imaged by the collimating optics 206 onto the input facets of the fibers 212 of the fiber bundle 208.
  • the collimating optics 206 are preferably dimensioned such that all the fibers of the fiber bundle 208 are uniformly exposed to electromagnetic radiation by the laser pulse.
  • a coupling-in optical system such as a lens array (not shown here) can be arranged, which injects the incident laser radiation into the individual fibers of the fiber bundle 208 with high efficiency.
  • FIG. 2 b) shows by way of example a frontal view of a fiber bundle 208 consisting of three individual fibers 212. Along the course of the fiber bundle 208 (in FIG. 2 a) from left to right), the individual fibers 212 of the fiber bundle 208 are now rearranged. As can be seen on the right side of FIG.
  • the individual fibers 212 which are initially arranged in a triangle, are arranged in a row on the right-hand side of the fiber bundle 208 on the output side.
  • the laser light coupled out of this row of fiber facets is subsequently imaged by the imaging optics 210 onto the surface or the photosensitive layer of the document 102.
  • the imaging optics are preferably designed so that the relative position of the individual laser pulses coupled out of the fibers 212 does not change due to the imaging of the fiber ends on the surface of the document 102.
  • a fiber bundle according to FIG. 2 b) generates a pixel on the document 102 which is constructed from three superimposed sub-pixels 108.
  • FIG. 2 c shows a further variant in which the fiber bundle 208 is made up of a total of seven individual fibers 212, which are arranged in a circle. By rearranging the fiber ends, a triangular structure is created here, which is subsequently imaged onto the document 102 by the imaging optics 210. Thus, using a fiber bundle as shown in FIG. 2c, a pixel 106 constructed from a triangular array of sub-pixels 108 would be generated. As a further example, a fiber bundle 208 consisting of 19 individual fibers 212 is shown schematically in FIG. 2 d). In this case, according to FIG.
  • the individual fibers 2 2 of the fiber bundle 208 are arranged such that on the right side of the fiber bundle 208 the fiber facets take the form of an smiley.
  • Such a geometric pattern can also be imaged on the document 02 by the imaging optics 210, whereby a pixel 106 is generated which in its substructure represents a smiley composed of sub-pixels 108.
  • FIG. 3 a) is a further schematic illustration of a personalization device 200, which basically is constructed analogously to the personalization device 200 of FIG. 2 a).
  • the personalization device 200 shown in FIG. 3 a) differs in that a mask 214 is arranged between the collimation optics 206 and the fiber bundle 208.
  • the mask may, for example, be a blackened metal plate which has recesses at defined positions. In this case, the position of the recess can be selected so that upon application of the fiber bundle 208 with a laser pulse only certain fibers 212 of the fiber bundle 208 are exposed to laser light. This is shown by way of example in FIG. 3b). As can be seen in FIG.
  • the personalization device 200 shown in FIG. 3 a) can have a magazine or a change system with a multiplicity of masks 214. This is preferably designed so that the masks 214 can be inserted into or removed from the beam path of the laser pulse generated by the beam source 202 by the alternating system. Thus, it becomes possible to switch between different generated pixels or different substructures in rapid succession. This would make it possible to select a different geometric shape for each pixel 106 when generating a graphic 100 on the document 02.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un dispositif de personnalisation (200) comprenant un système optique (204) et une source de faisceau (202) pour la génération d'impulsions laser pour la personnalisation d'un document (102) avec un graphique (100), le dispositif de personnalisation (200) comportant en outre des moyens de mémoire électroniques pour la mise en mémoire du graphique (100). Le graphique (100) comporte une pluralité de points d'image (106). Le dispositif de personnalisation (200) est conçu pour générer les points d'image (106) du graphique (100) sur le document (102) par exposition d'une couche photosensible du document (102) aux impulsions laser. Un premier sous-groupe de points d'image (106) parmi la pluralité de points d'image (106) présente une première forme géométrique. Au moins un sous-groupe supplémentaire de points d'image (106) parmi la pluralité de points d'image (106) présente une forme géométrique qui se distingue de la première forme géométrique. Le dispositif de personnalisation (200) est conçu pour diriger des impulsions laser générées par la source de faisceau sur la position d'un point d'image (106) au moyen du système optique (204), le système optique (204) étant conçu pour adapter le profil d'intensité transversal de l'impulsion laser à la forme géométrique respective du point d'image (106).
EP16723051.5A 2015-05-05 2016-05-03 Dispositif de personnalisation et procédé de personnalisation d'un document Active EP3291994B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015208297.0A DE102015208297A1 (de) 2015-05-05 2015-05-05 Personalisierungsvorrichtung und Verfahren zur Personalisierung eines Dokuments
PCT/EP2016/059856 WO2016177708A1 (fr) 2015-05-05 2016-05-03 Dispositif de personnalisation et procédé de personnalisation d'un document

Publications (2)

Publication Number Publication Date
EP3291994A1 true EP3291994A1 (fr) 2018-03-14
EP3291994B1 EP3291994B1 (fr) 2019-07-03

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EP16723051.5A Active EP3291994B1 (fr) 2015-05-05 2016-05-03 Dispositif de personnalisation et procédé de personnalisation d'un document

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EP (1) EP3291994B1 (fr)
DE (1) DE102015208297A1 (fr)
WO (1) WO2016177708A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6909553B2 (en) * 2001-08-03 2005-06-21 Mems Optical, Inc. Multi-aperture beam integrator/method producing a continuously variable complex image
EP2147799A1 (fr) * 2008-07-21 2010-01-27 Gemplus Sécurisation d'une image imprimée au moyen d'un faisceau laser
US8314828B2 (en) * 2009-10-18 2012-11-20 Gemalto Sa Personalization of physical media by selectively revealing and hiding pre-printed color pixels
DE102010010072A1 (de) * 2010-02-26 2011-09-01 Bundesdruckerei Gmbh Markierungsvorrichtung und Verfahren zum farbigen Markieren von Wert- oder Sicherheitsdokumenten
FR2971972B1 (fr) * 2011-02-28 2013-03-08 Jean Pierre Lazzari Procede de formation d'une image laser couleur a haut rendement reflectif et document sur lequel une image laser couleur est ainsi realisee
EP2747406A1 (fr) * 2012-12-21 2014-06-25 Gemalto SA Procédé d'intégration de données auxiliaires dans une image, procédé de lecture de données auxiliaires enfouies dans une image et support personnalisé par exposition sélective à des photons
EP2851207B1 (fr) * 2013-07-25 2015-12-30 Oberthur Technologies Personnalisation de documents

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Publication number Publication date
EP3291994B1 (fr) 2019-07-03
WO2016177708A1 (fr) 2016-11-10
DE102015208297A1 (de) 2016-11-10

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