EP4088946A1 - Herstellung eines bilds aus einer holografischen struktur - Google Patents

Herstellung eines bilds aus einer holografischen struktur Download PDF

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Publication number
EP4088946A1
EP4088946A1 EP22172456.0A EP22172456A EP4088946A1 EP 4088946 A1 EP4088946 A1 EP 4088946A1 EP 22172456 A EP22172456 A EP 22172456A EP 4088946 A1 EP4088946 A1 EP 4088946A1
Authority
EP
European Patent Office
Prior art keywords
layer
pixels
arrangement
demetallized
zones
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
EP22172456.0A
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English (en)
French (fr)
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EP4088946B1 (de
Inventor
Paul AZUELOS
Benoît BERTHE
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.)
Idemia France SAS
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Idemia France SAS
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Filing date
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Publication of EP4088946A1 publication Critical patent/EP4088946A1/de
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Publication of EP4088946B1 publication Critical patent/EP4088946B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/465—Associating two or more layers using chemicals or adhesives
    • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
    • 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
    • B42D25/324—Reliefs
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/373—Metallic materials
    • 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
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
    • 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
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • 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
    • B42D25/45—Associating two or more layers
    • B42D25/46—Associating two or more layers using pressure

Definitions

  • the invention proposes to form an image in color or in levels of gray in a secure manner from a metallic holographic layer forming an arrangement of pixels.
  • the figures 1 and 2 represent an embodiment which does not implement the principle of the invention. More specifically, the figure 1 represents a multilayer structure 2, in an initial (virgin) state, from which a personalized color image can be formed.
  • the multilayer structure 2 comprises a stack of layers laminated together, namely an upper layer 4 in polymer, a holographic layer 6 comprising a metallic holographic structure, an adhesive lower layer 12 in polymer and a support layer 14.
  • the holographic layer 6 is positioned on the lower layer 12 and the lamination is carried out so that the assembly formed by the holographic layer 6 and the lower layer 12 is interposed between the upper layer 4 on the one hand and the support layer 14 on the other hand.
  • the metallic holographic structure in the holographic layer 6 intrinsically forms an arrangement of pixels (not represented) which is blank, in the sense that the pixels do not include the information defining the pattern of the final color image.
  • Each pixel includes a plurality of color sub-pixels.
  • the quality of the adhesion between metal and polymer is often limited.
  • the projection of the laser radiation 18 ( figure 2 ) on the metal film of the holographic layer 6 generates significant mechanical stresses in the multilayer structure during the personalization of the arrangement of pixels.
  • the exposure of the metallic film to the laser 18 leads in particular to the sublimation of the metal present in the metallic film, which significantly degrades the adhesion between the layers.
  • the layers of the multilayer structure 2 are then no longer in contact in these sublimation zones.
  • the adhesion of the holographic structure is therefore thus reduced, which can lead to a loss of cohesion of the multilayer structure during personalization, possibly going as far as the generation of delaminations in the multilayer structure (so-called “blistering” effect).
  • This phenomenon of sublimation of the metal and delamination significantly degrades the quality of the final color image obtained at the end of the personalization.
  • the invention also relates to a corresponding document (also called secure document or multilayer structure).
  • a corresponding document also called secure document or multilayer structure.
  • the invention relates to a document comprising structural characteristics identical to those obtained by the manufacturing method of the invention.
  • a holographic layer 6 (also called “first layer”) is provided (or formed) comprising a metallic holographic structure.
  • This holographic structure is formed by reliefs (or structures in relief) 8 and by a metal sub-layer 10 (or metal sub-layer, or metal film) covering the reliefs 8 of the holographic layer 6.
  • the reliefs 8 form salient portions (also called “mountains”) separated by recesses (also called “valleys”). These protruding portions and recesses define three-dimensional information.
  • the holographic layer 6 is provided (or included) within a multilayer structure 25 ( Figure 3A ) which comprises a stack of layers, namely an upper layer 4 in polymer, the holographic layer 6, a lower layer 12 in polymer and a support layer 14.
  • the holographic layer 6 is positioned on the lower layer 12 and the lamination is carried out so that the assembly formed by the holographic layer 6 and the lower layer 12 is interposed between the upper layer 4 on the one hand and the support layer 14 on the other hand.
  • the holographic layer is located at the interface between the upper layer 4 and the lower layer 12.
  • the upper layer 4 and the support layer 14 are for example made of polycarbonate, or of another polymer.
  • the multilayer structure 25 is at this stage (S2) in an initial state (or virgin state), from which can be formed a personalized color image IG (also called final image) as represented by way of example in figure 6 .
  • a personalized color image IG also called final image
  • the multilayer structure 25 can be customized by laser so as to form this personalized image IG.
  • the holographic structure of the holographic layer 6 intrinsically forms an arrangement 26 of pixels 27.
  • Each pixel 27 comprises a plurality of sub-pixels 28 of distinct colors.
  • Each sub-pixel has for example an elementary color of a color base (for example a color in the red-green-blue base).
  • Each sub-pixel 28 in the array 26 of pixels may be formed by a respective holographic grating configured to generate by diffraction a corresponding color of said sub-pixel.
  • the arrangement 26 of pixels is blank, in the sense that the pixels 27 do not include the information defining the pattern of the final image IG that it is desired to form. As described later, it is in combining this 26 pixel arrangement with areas of color shading one reveals the pattern of the final IG image.
  • the holographic structure produces the arrangement 26 of pixels 27 in the form of a hologram by diffraction, refraction and/or reflection of incident light.
  • the holographic layer 6 forms the arrangement 26 of pixels by holographic effect.
  • the principle of the hologram is well known to those skilled in the art so that only certain elements are recalled below for reference. Examples of embodiments of holographic structures are described for example in the document EP 2 567 270 B1 .
  • the holographic layer 6 may possibly comprise other sub-layers (not shown) necessary for maintaining the optical characteristics of the hologram and/or making it possible to ensure mechanical and chemical resistance of the assembly.
  • the holographic layer 6 is partially destroyed by means of a first laser radiation LS1, so as to selectively remove (or delete, or demetallize) at least portions of the metallic sub-layer 10 to form demetallized zones 30 in the 26 pixel arrangement.
  • this demetallization step amounts here to forming perforations or holes 30 in the holographic structure of the first layer 6.
  • these destroyed zones are through perforations which extend through the thickness of the holographic layer 6, at the interface between the upper layer 4 and the lower layer 12.
  • this partial destruction step S4 aims more particularly to remove the metal in certain areas 30 of the holographic layer 6 in order to prevent sublimation of the metal from occurring in these zones during the subsequent personalization step S8.
  • the final image IG is still not visible insofar as the arrangement 26 of pixels has not yet been personalized according to the pattern of the desired image.
  • the demetallized areas 30 can be formed in various demetallization patterns.
  • the demetallized zones 30 can thus form (or constitute) demetallized lines, for example rectilinear lines.
  • the demetallized zones 30 can constitute islands (of any shape, rectangular or square for example) which are for example distributed periodically in the holographic layer 6.
  • the demetallized zones 30 form demetallization lines with a maximum width of 50 ⁇ m, or even 40 ⁇ m, or even 5 ⁇ m, or even 2 ⁇ m.
  • the demetallized zones 30 form islands or lines whose smallest size dimension in the plane of the arrangement 26 of pixels (island size or line width) is less than or equal to 50 ⁇ m, or even less or even 40 ⁇ m, or even 5 ⁇ m, or even 2 ⁇ m.
  • the demetallized zones 30 are rectangular, then their smallest dimension (width) in the plane of the arrangement 26 of pixels is less than or equal to one of the aforementioned threshold values.
  • the demetallized areas 30 are circular islands, then their radius in the plane of the arrangement 26 of pixels is less than or equal to one of the aforementioned threshold values.
  • the demetallization lines 29 of said at least one group are arranged periodically in the holographic layer 6 (in the plane of the arrangement 26 of pixels).
  • the demetallized lines 29 comprise a first group of demetallized lines LN1 arranged periodically so as to extend parallel in a first direction DR1 and comprising a second group of demetallized lines LN2 arranged periodically so as to extend parallel in a second direction DR2 (different from DR1), the lines LN1, LN2 of the first and second groups intersecting with each other.
  • the holographic layer 6 is provided in a multilayer structure 25 so as to be already interposed between the upper and lower layers 4, 12, these layers being arranged together on the support layer 14.
  • the The lamination step S4 consists in this particular example of laminating together the holographic layer 6, the upper layer 4, the lower layer 12 and the support layer 14.
  • the lower layer 12 and the support layer 14 form the same bottom layer, preferably adhesive.
  • a lamination is a mechanical process well known to those skilled in the art during which mechanical pressure is applied for an appropriate duration, with or without the supply of heat, so as to form a substantially coherent laminated assembly.
  • a step S8 is carried out ( 3d figures and 5 ) personalization of the arrangement 26 of pixels by formation by means of a second laser radiation LS2, in the holographic layer 6, of perforations (or holes) 40 revealing locally through the holographic structure (that is to say say through the holographic layer 6) areas 44 of shades of color in the sub-pixels 28, so as to form a personalized image IG from the arrangement 26 of pixels combined with the areas 44 of shades of color.
  • These zones 44 of shade of color are caused by underlying regions 42 of the lower layer 12 located opposite the perforations 40 (these underlying regions 42 therefore being visible by an observer OB through perforations 40).
  • the holographic effect is eliminated, or reduced, in the perforated regions of the holographic structure, which decreases (or even completely eliminates) the relative color contribution of the at least partially perforated sub-pixels 28 with respect to at least another neighboring sub-pixel 28 of the pixels 27 concerned.
  • FIG. 6C illustrates the visual rendering of a personalized image IG at the end of the personalization step S8. It is assumed here that the image IG thus created is a color image resulting from a selective modulation of the colorimetric contributions of sub-pixels 28 of color. As already indicated, it is however possible to produce a personalized image IG in shades of gray in the same way, for example by adapting the colors of the sub-pixels 28 accordingly.
  • the lower layer 12 comprises an opaque black surface facing the holographic layer 6 and/or comprises black or black opacifying (or dark) pigments in its mass.
  • the lower layer 12 may include in particular a black ink, or even a material tinted in its mass by black or opacifying (or dark) pigments.
  • the second laser radiation LS2 used in S8 to form the perforations 40 in the holographic layer 6 is preferably at a spectrum of wavelengths SP2 different from the spectrum of wavelengths of the visible.
  • a YAG laser for example at a wavelength of 1064 nm
  • a blue laser for example
  • a UV laser etc.
  • a pulse frequency for example, a pulse frequency of between 1 kHz and 100 kHz, although other configurations are possible. It is up to the person skilled in the art to choose the configuration of the laser radiation LS2 according to the specific case.
  • the second laser radiation LS2 is identical to the first laser radiation LS1 used during demetallization S4 ( figure 5 ).
  • the holographic layer 6 (and more particularly its holographic structure) to at least partially absorb the energy delivered by the laser radiation LS2 to create the perforations 40 previously described.
  • the laser radiation LS2 is characterized by a spectrum of wavelengths SP2 which is absorbed at least partially by the holographic structure. It is therefore possible to choose the materials of the holographic layer 6 accordingly.
  • the materials forming the holographic structure are selected so that they do not absorb light in the visible. In this way, it is possible to create perforations 40 by means of laser radiation LS2 emitting outside the visible spectrum and to generate a personalized image IG which is visible to the human eye by holographic effect. Examples of materials are described later (transparent polycarbonate, PVC, transparent glue, etc.).
  • the absence of metal in the demetallized zones 30 makes it possible to avoid the phenomenon of sublimation which would otherwise be caused in these zones during the personalization S8 by laser.
  • the demetallized zones 30 thus form zones of increased adhesion which make it possible to avoid delaminations during customization S8.
  • the adhesion bridges between the polymer material of the upper and lower layers 4, 12 make it possible to ensure better cohesion to the multilayer structure.
  • the invention thus makes it possible to increase the mechanical resistance of the multilayer structure, in particular in the face of the stresses generated during step S8 of personalization by the second laser radiation LS2, and therefore to avoid or significantly reduce the phenomenon of delamination described above. Thanks to the invention, it is possible to produce high-quality secure images in color or in levels of gray.
  • a holographic layer makes it possible to obtain an increased image quality, namely a better overall luminosity of the final image (more brilliance, more vivid colors) and a better capacity for color saturation. We can thus form a high quality color image with an improved color gamut compared to a printed image for example.
  • a holographic structure to form the arrangement of pixels is advantageous in that this technique offers high positioning precision for the pixels and sub-pixels thus formed. This technique makes it possible in particular to avoid overlaps or misalignments between sub-pixels, which improves the overall visual rendering.
  • the invention makes it possible to produce personalized images that are easily authenticated and resistant to falsifications and fraudulent reproductions. It is in particular possible to produce the demetallized zones 30 according to complex patterns which are recognizable and authenticated using appropriate display means.
  • the level of complexity and security of the image which is achieved thanks to the invention is not at the expense of the quality of the visual rendering of the image.
  • metallized zones of the holographic layer which are intended to be subsequently demetallized by laser LS1 during the partial destruction S4.
  • certain metallized zones of the holographic structure can be formed between each line of sub-pixels in the array of pixels, these white lines being for example of smaller width than the lines of sub-pixels.
  • the device DV2 can comprise display means for displaying during customization S8 the visual markers 46 present in the arrangement 26 of pixels, as well as laser projection means for projecting the laser radiation LS2 at determined positions. from the visual cues 46.
  • the visualization function is represented by the reference VS in figure 7 .
  • the device DV2 is in particular capable of moving relative to the arrangement 26 of pixels so as to detect the visual markers 46 and to position the laser projection means so as to form, by perforation with the laser LS2, the perforations 40 through the holographic layer 6.
  • the personalization device DV2 detects (S20) visual markers 46 present in the arrangement 26 of pixels, then determines (S22) from the visual markers 46, positions in the arrangement 26 pixels corresponding to 28 sub-pixels to customize. The device DV2 then projects the second laser radiation LS2 to form the perforations 40 in the holographic layer 6 at the positions thus determined.
  • the formation of the demetallized zones 30 during the partial destruction step S4 can make the personalization step S8 which follows more difficult.
  • the presence of the demetallized zones 30 can lead, during the personalization S8, to a degradation of the visibility of the visual markers 46 and/or to an alteration of the shape of the visual markers 46. This thus makes it more difficult to detect the visual cues during S8 customization, which can lead to punch 40 positioning errors and thus degraded IG custom image quality.
  • the figure 8A represents for example visual cues 46 as displayed by the display means of the device DV2 during the personalization step S8 (more particularly during the detection step S20, figure 7 ), in the particular example where the demetallized zones are configured as shown in figure 4B .
  • the visual cues 46 appear for the personalization device DV2 with limited contrast and are difficult to detect for the DV2 device.
  • the invention ensures that once the demetallization has been carried out in registration with respect to the visual cues 46 used for personalization, it is possible to know precisely the position of the demetallized zones 30 thus obtained.
  • laser parameters during S8 personalization with the LS2 laser can be adapted to optimize the quality of the personalized IG image (using a more energetic laser beam), but this more energetic optimization is likely to pose a problem because it can lead to delaminations in the demetallized zones 30. Since the position of the demetallized zones with respect to the visual markers is known with precision, it is thus possible to create a knockout in the image to be personalized so as not to affect the zones demetallized, which makes it possible to use a more energetic beam without risk of delamination.
  • FIG 9 represents, according to a particular example, a manufacturing system SY1 comprising the device DV1 configured to form the demetallized zones 30 during the step S4 of partial destruction.
  • System SY1 further comprises a system of rollers (including rollers 52 and 54) for moving holographic layer 6 relative to device DV1.
  • the device DV1 comprises display means (for example a camera) for displaying the arrangement 26 of pixels formed by the holographic layer 6.
  • the display function of the display means is represented by the reference VS in figure 9 .
  • the visualization function VS in particular allows the device DV1 to examine the surface of the holographic layer and to detect visual cues, namely the visual cues 46 or other visual cues present for this purpose in the arrangement 26 of pixels to allow demetallization in S4 in registration with pixels 27.
  • the demetallized areas 30 can be distributed periodically in the holographic layer 6.
  • the demetallized zones 30 can form demetallization lines with a maximum width of 50 ⁇ m, or even 40 ⁇ m, or even 5 ⁇ m, or even 2 ⁇ m.
  • the demetallized zones 30 can form at least one group of demetallization lines parallel to one another, the distance between two consecutive demetallization lines of said at least one group being at most 60 ⁇ m, or even 50 ⁇ m.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)
EP22172456.0A 2021-05-10 2022-05-10 Herstellung eines bilds aus einer holografischen struktur Active EP4088946B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2104918A FR3122608B1 (fr) 2021-05-10 2021-05-10 Fabrication d’une image à partir d’une structure holographique

Publications (2)

Publication Number Publication Date
EP4088946A1 true EP4088946A1 (de) 2022-11-16
EP4088946B1 EP4088946B1 (de) 2023-06-28

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FR (1) FR3122608B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012211767A1 (de) * 2012-07-05 2014-01-09 Bundesdruckerei Gmbh Verfahren zur Herstellung von farbig personalisierbaren Sicherheitsdokumentenrohlingen, farbig personalisierte Sicherheitsdokumente und Verfahren zur Personalisierung
EP2580065B1 (de) 2010-04-07 2014-08-06 Jean-Pierre Lazzari Verfahren zur personalisierung von latenten eingbetteten bildern und damit hergestelltes dokument
EP2681053B1 (de) 2011-02-28 2015-04-08 Jean-Pierre Lazzari Verfahren zur herstellung eines farbigen laserbildes mit hoher reflektivität und dokument mit auf diese weise hergestelltem farbigem laserbild
FR3093302A1 (fr) 2019-02-28 2020-09-04 Idemia France Image couleur formée à partir d’un hologramme

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2580065B1 (de) 2010-04-07 2014-08-06 Jean-Pierre Lazzari Verfahren zur personalisierung von latenten eingbetteten bildern und damit hergestelltes dokument
EP2681053B1 (de) 2011-02-28 2015-04-08 Jean-Pierre Lazzari Verfahren zur herstellung eines farbigen laserbildes mit hoher reflektivität und dokument mit auf diese weise hergestelltem farbigem laserbild
DE102012211767A1 (de) * 2012-07-05 2014-01-09 Bundesdruckerei Gmbh Verfahren zur Herstellung von farbig personalisierbaren Sicherheitsdokumentenrohlingen, farbig personalisierte Sicherheitsdokumente und Verfahren zur Personalisierung
FR3093302A1 (fr) 2019-02-28 2020-09-04 Idemia France Image couleur formée à partir d’un hologramme

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Publication number Publication date
EP4088946B1 (de) 2023-06-28
FR3122608A1 (fr) 2022-11-11
FR3122608B1 (fr) 2023-09-08

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