EP1878584B1 - Méthode pour la fabrication d'un corps multicouche à micro-optique - Google Patents

Méthode pour la fabrication d'un corps multicouche à micro-optique Download PDF

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Publication number
EP1878584B1
EP1878584B1 EP07013569.4A EP07013569A EP1878584B1 EP 1878584 B1 EP1878584 B1 EP 1878584B1 EP 07013569 A EP07013569 A EP 07013569A EP 1878584 B1 EP1878584 B1 EP 1878584B1
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EP
European Patent Office
Prior art keywords
micro
optical
layer
lacquer
intaglio printing
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.)
Active
Application number
EP07013569.4A
Other languages
German (de)
English (en)
Other versions
EP1878584A3 (fr
EP1878584B2 (fr
EP1878584A2 (fr
Inventor
Wayne Robert Dr. Tompkin
Andreas Dr. Schilling
Achim Dr. Hansen
Stéphane Bolognini
Vincent Moreau
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.)
OVD Kinegram AG
KBA Notasys SA
Original Assignee
OVD Kinegram AG
KBA Notasys SA
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
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Application filed by OVD Kinegram AG, KBA Notasys SA filed Critical OVD Kinegram AG
Publication of EP1878584A2 publication Critical patent/EP1878584A2/fr
Publication of EP1878584A3 publication Critical patent/EP1878584A3/fr
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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
    • B42D25/405—Marking
    • B42D25/43—Marking by removal of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing
    • 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
    • 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
    • B42D2035/44—

Definitions

  • the invention relates to a method for producing a multilayer body with micro-optical structures.
  • micromirror array which is transferable to a paper or plastic substrate by printing with ink or lacquer.
  • the period of the micromirrors is typically 30 to 60 ⁇ m.
  • the micromirrors can be used both in transmitted and reflected light. In this way, a two-channel tilting image can be formed.
  • the WO-A-2004 030 928 describes a security element and a method for producing a security element in a film having a transparent or translucent layer and a reflective layer, wherein at least a part of the reflective layer is visible from a first side of the film through the transparent or translucent layer.
  • the film is blind embossed to the layer on the reflective layer to form a transient imprinted image.
  • the transitory image may be provided in a window or half-window formed by applying one or more opaque layers on one or both sides of the substrate in the region comprising the reflective layer and the transitory image.
  • the document WO-A-2004 030 928 describes in particular that the transitory image can be formed from embossed lines whose embossing depth is between 5 ⁇ m and the maximum possible embossing depth of the substrate.
  • the width-to-depth ratio is, for example, in the range of 6: 1 to 2: 1.
  • the DE-T-69406442 describes a safety device and method for making such safety devices.
  • a regular two-dimensional array of substantially identical printed microimages is provided, each having a size of up to 250 ⁇ m.
  • the microimages may be viewed by a physically separate regular two-dimensional array of substantially identical spherical microlenses having substantially the same pitch as the microimages.
  • Each of the microlenses has a diameter in the range of 50 to 250 ⁇ m.
  • the microimages may be mounted over an array of microimages, the allowable positional tolerance being in the range of 0.25 to 0.5 mm.
  • a security element has a transparent plastic substrate and microimages printed on one side of the plastic substrate and viewable by microlenses disposed on the other side of the plastic substrate.
  • This plastic substrate further has an opaque coating on both sides, wherein the coating has a window on the front side in the region of the microlenses.
  • the JP-A-2004 178 546 describes a provided as an optical certificate of authenticity element in which are arranged on a base material triangular prisms of a transparent material.
  • One of the free prism sides has an unprocessed transparent surface, and the other of the free prism sides has a reflective layer or a light diffusing layer.
  • the lower prism pages have an alphanumeric character or pattern.
  • the triangular prisms can be created by intaglio printing.
  • a radiation-curable lacquer is applied to a rotating embossing roller and a base material is pressed by means of a pressure roller on the paint, which is then dried at a drying station and cured at an irradiation station.
  • the JP-A-2004 347 828 describes a provided as an optical certificate of authenticity element in which are arranged on a base material triangular prisms of a transparent material.
  • One of the free prism pages has an unprocessed transparent surface that exposes the surface of the base material.
  • the JP-A-2004 209 940 describes a transfer film with an intended as an optical certificate of authenticity element, in which triangular prisms are arranged on a base material. The spaces between the triangular prisms are precipitated with a transparent material, which forms transparent triangular prisms, which are covered by an adhesive layer of the transfer film.
  • the US-A-2004 0061325 describes a security element for a document having an intaglio-printed latent image placed over a second image that is not intaglio-printed.
  • the latent image is formed from a highly reflective transparent ink and is visible in a first angular range near the vertical and in a second angular range closer to the surface of the document.
  • the latent image is not visible in the angular region between the two said angular regions, but the image located below the latent image is visible.
  • the highly reflective ink has metallic pigments, and the ink provided to form the second image has iridescent pigments. The two images are printed one after the other, with different printing methods being provided.
  • the US-A-2003 000 3275 describes a printed document or other element comprising a polymeric substrate.
  • a reflective or light colored layer of ink is applied directly to the surface of the polymer substrate by a printing process.
  • a printed image is applied to the reflective or light colored layer by an intaglio printing process.
  • the printed image is a raised image with a height of at least 5 ⁇ m that is visible from all viewing angles.
  • the optical effect of the image is enhanced by the reflective or light colored layer for selected viewing angles.
  • the invention is based on the object, a simple and inexpensive method for producing a multilayer body with micro-optical structures, which are in the registry for other security features, such as OVDs and pictorial representations.
  • the object of the invention is achieved by a method for producing a multilayer body having the features of claim 1.
  • the invention provides to apply micro-optical structures, such as microlens arrays or Blazegitter, by intaglio printing.
  • the produced multilayer body may be both a transfer film applied to a security document or the security document itself or a security document with transfer film.
  • micro-optical structure applied in an endless, repetitive pattern on the multilayer body or in the Multi-layer body is introduced without standing in the register to other micro-optical structures.
  • both the micro-optical structures and the image areas and / or effect areas are applied in the register.
  • the image areas may, for example, be monochrome or multicolor images, such as alphanumeric characters, logos or the like.
  • the effect areas can, for example, be OVDs, like like a hologram, KINEGRAM ®, blazed grating or.
  • the effect areas can also be tactile detectable effect areas, which, for example, make the value imprint of a bank note tangible in a suitable form. Tactile detectable areas may further provide protection against abrasion and / or contamination to other areas.
  • optical effects for example colored imprints, in particular by means of effect pigments
  • the register accuracy achieved with the method according to the invention can be achieved later only with great effort, so that the proposed method has a very high security against counterfeiting. It is also not possible to procure individual components and to unify them, because individual components, such as transfer films or the like, do not physically exist. Further advantages result from the fact that the microoptical structures and / or the image areas and / or the effect areas can at least partially overlap one another, as a result of which the security against counterfeiting is further increased.
  • the multilayer body produced according to the invention is characterized in that micro-optical structures can be produced which are not molded into a film layer. This avoids all the problems that can arise when microoptical structures are transferred in a roll-to-roll process into a transfer film and subsequently transferred to other security features in the register for other features. Another advantage is that a micro-optical structure consisting of unconnected is formed optical elements, can not be removed and transmitted without destroying the structure.
  • the arrangement of the micro-optical structures in the register further increases the security against forgery of the multilayer body according to the invention.
  • the multi-layer body may have a particularly strict register, because the effort to adjust the individual matched objects arises only once.
  • micro-optical structures and the image areas and / or effect areas are applied by gravure printing.
  • an optical paint is transferred by intaglio printing on the other layers.
  • a layer formed from the optical lacquer is applied to the further layers and then the microoptical structures are molded into the layer formed from the optical lacquer by pressing on an intaglio printing plate which is at least partially color-free.
  • the gravure plate at least partially as To use stamping and press the gravure plate under high pressure on the layer formed from the optical paint, so that the optical paint completely filled in the surface of the gravure plate wells and thus the surface profile of the intaglio plate is molded into the lacquer layer. It is therefore provided in this embodiment, without printing ink.
  • a large number of paints are available for the process according to the invention, for example also colored optical paints and for forming the image areas and / or the effect areas the entire range of gravure printing inks.
  • the layer formed from the optical lacquer is transferred to the further layers by means of a transfer film.
  • the optical lacquer can be, for example, a photopolymer lacquer whose viscosity can be adjusted by irradiation with UV light.
  • the photopolymer coating must be cured after application by means of UV light.
  • the Intaglio printing plate is heated at least in the color-free areas. It may be provided that the Intaglio printing plate is heated to 90 ° C to 100 ° C.
  • the following information is directed to the formation of the multilayer body produced by the method according to the invention.
  • the micro-optical structures of the multilayer body are, as stated above, formed of hemispherical or pyramidal or prismatic or cylindrical optical elements with a flat base, which are transferred by intaglio pressure on the multilayer body.
  • the said optical elements may be formed, for example, from an optical paint or the like, or from an ink or from any other printable material.
  • the optical elements can also be formed by embossing by means of the pressure plate, that is to say without material transfer from the depressions of the gravure printing plate to the surface of the multilayer body.
  • the micro-optical structures have a period spacing of 100 microns to 0.3 microns, preferably have a period spacing of 20 microns to 2 microns.
  • the micro-optical structures can have a depth of 50 ⁇ m to 1 ⁇ m. It can therefore be provided that the optical elements of which the micro-optical structures are formed, have a height of 50 microns to 1 micron.
  • depth-to-width ratios and aspect ratios can be formed in a wide range.
  • very high aspect ratios can lead to mechanically unstable structures.
  • such high aspect ratios are not required to form the currently known micro-optical structures.
  • the micro-optical structure contains hidden information.
  • the hidden information may be readable in reflected light and / or transmitted light, as explained in detail below.
  • the micro-optical structure is designed as a computer-generated hologram. It may be at the micro-optical structure may also be a grating, in particular a blazed grating, and / or a micro lens array and / or a hologram and / or a KINEGRAM ® or the like.
  • periodic structures in the range of a period length of 5 .mu.m to 0.3 .mu.m are preferred, it is also possible to use periodic structures with a period length of> 5 .mu.m, moth-eye structures, in particular in the form of sinusoidal high aspect ratio cross gratings and / or stochastic Structures act.
  • the micro-optical structure has pixels of different depth, the depth of the pixels encoding the hidden information.
  • the hidden information in the reflected light and / or transmitted light can be read out.
  • the reading of the hidden information by means of a laser is possible by the laser beam is directed to the micro-optical structure and the light reflected from the micro-optical structure or transmitted light is detected and evaluated by means of a sensor. Further, it is possible that the laser light reflected or transmitted by the micro-optical structure is projected on a screen and evaluated by a viewer.
  • the micro-optical structure may have pixel-shaped partial regions with different depth, the depth of the pixel-shaped partial regions encoding the hidden information.
  • the micro-optical structure is formed as a computer-generated holographic structure having a plurality of optical elements with different heights.
  • the pixel depth is ⁇ 1.5 ⁇ m.
  • 8 to 256 different pixel depths may be provided.
  • the pixels have a cross-sectional area of approximately 1 ⁇ m ⁇ 1 ⁇ m. It can be provided that the pixels have side lengths of 0.4 ⁇ m to 4 ⁇ m.
  • the hidden information can be read out by transmitted light, for example with laser light.
  • the laser beam passes through the micro-optical structure and an image of the micro-optical structure can be collected on a screen.
  • the image may be text, such as "OK," or an image or the like, such as an eagle's drawing.
  • a laser light source for example, a laser pointer can be used.
  • N 64 for a so-called kinoform.
  • the laser beam is reflected by the surface of the micro-optical structure and the image can be collected, for example, on a transparent screen arranged in front of the micro-optical structure, for example on a frosted glass screen.
  • the picture of the "air side" of the surface relief should be considered.
  • the image may again be a text, such as "OK,” or an image or the like, such as the drawing of an eagle.
  • a high refractive index material or a uniformly reflective material should be used for the microoptical structure.
  • optical elements of the micro-optical structures are formed from an optical lacquer.
  • the optical lacquer is a high refractive optical lacquer.
  • a high refractive index can improve the reflectivity of the paint.
  • the optical lacquer has a refractive index> 1.9.
  • a photopolymer applied in the said gravure printing process may be used as the optical paint.
  • the optical lacquer is doped with nanoparticles.
  • the optical paint is doped with color flakes.
  • a reflective material is obtained from the optical paint.
  • the nanoparticles include metals in crystal form or metal salts in colloidal form, for example CdS.
  • incorporation of PbS into a polymer matrix can raise the refractive index value to 2.5 to 3.0.
  • Nanocomposites of polymers and gold nanoparticles have already been designed with real components as low as 0.96.
  • the micro-optical structure may be an OVD, such as a hologram showing the letters "AB", and may be gravure printed or embossed on the surface of the multi-layer body.
  • the surface relief of the gravure printing plate can be produced, for example, by 2D or 3D holography or by using a dot-matrix machine. If that is the case Surface relief of the multilayer body is an undoped plastic surface relief exposed to air, the reflectivity of the OVD may be less brilliant than when HRI material or metal is used as usual, but the optical effects are present, albeit weakened.
  • the brilliance of the OVD can be increased.
  • the micro-optical structures having first layer of the multilayer body is coated with a protective layer.
  • This protective layer can typically be applied by screen printing. It may further be provided that it is a low-refractive protective layer.
  • the protective layer has a refractive index ⁇ 1.5.
  • the combination of a low-refractive-index protective layer with a high-index micro-optical structure or a micro-optical structure with an HRI surface can produce particularly good reflection at the micro-optical structure.
  • Fig. 1a shows a carrier substrate 1, which is in the illustrated embodiment, a banknote, on which a multi-layer body 2 is applied, which is formed from an adhesive layer 2k and a lamination 2l and applied for example as part of the transfer layer of a hot stamping foil on the carrier substrate 1 is.
  • the multilayer body 2 is designed as a transparent multilayer body, so that the multilayer body 2 releases the view of the carrier substrate 1 arranged below it.
  • On the carrier substrate 1 facing away from the top of the lamination 21 is transferred by means of a gravure plate 3, an optical paint 4, which is introduced into depressions of the intaglio printing plate 3 is.
  • the intaglio printing plate 3 is moved in the direction of the arrows 5 with a high contact pressure against a backing plate located behind the backing substrate and brought into contact with the lamination 2l, wherein the introduced into the wells of the intaglio printing plate 3 optical lacquer dissolves 4 of the wells and on the Top of the lamination 2l adheres. It forms micro-optical structures 6a and 6b in this way ( Fig. 1b ) out.
  • the optical varnish 4 has a refractive index of about 1.5, because the micro-optical structures 6a and 6b formed by the varnish adjoin air.
  • the micro-optical structure 6a is a microlens array
  • the micro-optical structure 6b is an asymmetrical relief structure, for example a blazed grating.
  • the microlens array may be provided to optically magnify a pictorial representation or alphanumeric characters printed on the carrier substrate.
  • the blaze grating may be provided to form an interesting optical effect.
  • the boundary contours of the Blaze grid can be designed, for example, as a logo or as an alphanumeric character.
  • the intaglio printing plate 3 may be a plate-shaped body or a cylindrical body or a curved plate arranged on a printing cylinder. It can be provided that on a printing cylinder or the like more gravure plates are arranged, for example, register in the register with the micro-optical structures 6a and 6b color layers on the lamination 2, which may form, for example, a background pattern that partially or completely through the micro-optical structures 6a and 6b is covered.
  • the Fig. 2a and 2b Now show a second embodiment of the method according to the invention.
  • Fig. 2a shows the multi-layer body 2 from Fig. 1a which is applied to the carrier substrate 1.
  • the multilayer body 2 has the adhesive layer 2k and the laminating layer 2l.
  • the intaglio printing plate 3 is now used only as an embossing tool, with the impression under pressure 5, the micro-optical structures 6a and 6b are molded into the laminating 2l (see Fig. 2b ).
  • the micro-optical Structures 6a and 6b may simultaneously constitute a tactile detectable security feature.
  • the Fig. 3a to 3c Now show a third embodiment of the method according to the invention.
  • Fig. 3a shows a multilayer body 32 which is applied to the carrier substrate 1.
  • the multi-layer body 32 like the multi-layer body 2, has the adhesive layer 2k and the lamination layer 2l, on whose side facing away from the adhesive layer an optical lacquer layer 34 is applied.
  • the optical lacquer layer 34 Into the optical lacquer layer 34, by means of the intaglio printing plate 3 under contact pressure 5, the optical structures 6a and 6b (see Fig. 3b ) molded.
  • Fig. 3c shows now in the third step, the multi-layer body 32 with an applied on the surface of the lacquer layer 34 protective layer 7.
  • the protective layer 7 is formed with a low refractive index, for example with a refractive index ⁇ 1.5, preferably with a refractive index ⁇ 1.
  • the protective layer 7 to a normal Abdecklack having a refractive index of about 1.5 and is applied by screen printing.
  • the optical lacquer layer 34 advantageously has a high refractive index, for example> 1.9. It may be doped to form the high refractive index, for example with nanoparticles.
  • the protective layer 7 increases the long-term stability of the molded in the lacquer layer 34 micro-optical structures 6a and 6b and protects them from contamination and / or wear.
  • Fig. 4 now shows an example of application of the method according to the invention.
  • a banknote 41 carries on its front side a film strip 42 having an OVD 42o and a latent image 42l.
  • the latent image 42l is formed in this embodiment of interleaved Blazegittern, resulting in a tilted image.
  • Another latent image 41l is executed as a color printed image and printed on the not covered by the film strip 42 surface of the banknote 41.
  • the latent images 41l and 42l are in the in Fig. 4 illustrated embodiment arranged in alignment with each other in a spaced-apart.
  • the latent image 42l shows the letter "O" and the latent image 41l shows the letter "K".
  • the latent images are visible only at a predetermined viewing angle. They are invisible from all other points of view, ie latent.
  • another OVD 43 is applied to the surface of the banknote 41 not covered by the film strip 42.
  • the banknote 41 further has a microlens array 44, which is arranged above an image area 45 in the register.
  • the OVDs 42o and 43 are also arranged in register with the microlens array 44 and are partially covered by the microlens array 44.
  • any other security document can also be provided.
  • the banknote 41 may optionally have a window 46, which projects at least partially into the region of the microlens array.
  • FIG. 5 now shows a second example of application of the method according to the invention.
  • a window bank note 50 shown in a schematic sectional view has a carrier substrate 51 which is formed with window-like openings 51fa and 51fb.
  • the carrier substrate 51 may be, for example, a paper suitable for banknotes or a plastic film.
  • a laminating layer 52 includes optically variable elements (OVD) 52oa and 52ob, which may be, for example, a KINEGRAM®.
  • ODD optically variable elements
  • the KINEGRAM® can be fully metallised, demetallised or with a through the aspect ratio of the Surface reliefs may be carried out certain metallization, run with HRI layer or as a multilayer, or designed as a system with color change effects, and there may be a (crosslinked) liquid crystal layer integrated into the system.
  • the OVD 52ob is arranged in the window opening 51fb and can therefore be viewed both in reflected light and in transmitted light.
  • the OVD 52oa is disposed outside the window openings 51fa and 51fb, and therefore, can only be viewed in reflected light from the front of the sill 50.
  • the laminating layer 52 may be formed as a transparent film or as a semitransparent film, for example as a colored film.
  • the laminating layer 52 has on its underside an adhesive layer 53, by means of which it is connected to the carrier substrate 51.
  • the adhesive layer may be a hot melt adhesive.
  • the top of the laminating layer 52 is now printed with different security elements. It is a computer-generated hologram 54g provided with hidden information; a hologram 54h which can effectively represent, for example, alphanumeric characters such as a value impression; tactile features 54t, which may provide, for example, tactile information about the value of the bill; and a microlens array 54m, which in this embodiment is registered in register with the OVD 52ob disposed in the window aperture 51fb.
  • the microlens array 54m when viewed from the front of the window banknote 50, produces an optically magnified image of the optical information stored in the OVD 52ob.
  • the microlens array 54m when viewing the back side of the sill 50, the microlens array 54m is not optically effective, so that the optical information stored in the OVD 52ob appears to be all natural.
  • the holograms 54g and 54h, the tactile feature 54t and the microlens array 54m are applied in intaglio pressure in one operation and therefore arranged in a strict register relative to one another.
  • the microlens array 54m is deposited in register with the OVD 52ob, then the other printed elements are also in register with the OVD 52ob and any other elements incorporated in the register in the lamination layer, such as the OVD 52oa.
  • the computer generated hologram 54g has pixel areas of different depths.
  • the maximum pixel depth is in the in Fig. 5 illustrated embodiment 1 micron, the pixels have a size of 1 micron x 1 micron.
  • the hidden information is encoded in the pixel depth, which causes a change in the phase angle of the incident light. For example, 8 to 256 different depths may be provided, ie information from 8 bits to 256 bits may be stored depending on the number of different depths in a pixel.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Laminated Bodies (AREA)

Claims (7)

  1. Procédé de fabrication d'un corps multicouche, comprenant une première couche formée de structures micro-optiques et recouvrant au moins en partie une ou plusieurs autres couches présentant des zones d'image et/ou des zones à effet réalisant un effet optique,
    caractérisé en ce que :
    les structures micro-optiques (6a, 6b, 54g, 54h, 54m) sont appliquées par impression en taille douce à la couche située sous la première couche ou sont incorporées dans la première couche, dans lequel les structures micro-optiques (6a, 6b, 54g, 54h, 54m) ainsi que les zones d'image (45) et/ou les zones à effet (411, 421, 42o, 43, 54t) sont appliquées en repérage par la même planche d'impression et/ou la même machine à imprimer.
  2. Procédé selon la revendication 1,
    caractérisé en ce que :
    aussi bien les structures micro-optiques (6a, 6b, 54g, 54h, 54m) que les zones d'image (45), et/ou les zones à effet (411, 421, 42o, 43, 54t) sont appliquées par impression en taille douce.
  3. Procédé selon l'une quelconque des revendications précédentes,
    caractérisé en ce que :
    pour l'application des structures micro-optiques (6a, 6b), un vernis optique (4) est transféré sur les autres couches au moyen d'une impression en taille douce.
  4. Procédé selon la revendication 3,
    caractérisé en ce que :
    sur les autres couches est appliquée une couche (24) formée à partir du vernis optique (4), et ensuite, les structures micro-optiques (6a, 6b) sont reproduites par pressage d'une planche d'impression à taille douce dans la couche (24) formée à partir du vernis optique.
  5. Procédé selon la revendication 4,
    caractérisé en ce que :
    la couche (24) formée à partir du vernis optique (4) est transférée sur les autres couches au moyen d'une feuille de transfert.
  6. Procédé selon la revendication 4 ou 5,
    caractérisé en ce que :
    la planche d'impression en taille douce est chauffée, en particulier en ce que la planche d'impression en taille douce est chauffée entre 90°C et 100°C.
  7. Procédé selon la revendication 6,
    caractérisé en ce que :
    sur la planche d'impression en taille douce, dans une première zone un vernis, en particulier un vernis coloré, est appliqué et dans une deuxième zone, aucun vernis n'est appliqué, et ensuite, par pressage de la planche d'impression en taille douce, les structures micro-optiques sont reproduites dans la deuxième zone.
EP07013569.4A 2006-07-13 2007-07-11 Corps multicouche à micro-optique Active EP1878584B2 (fr)

Applications Claiming Priority (1)

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DE102006032660A DE102006032660A1 (de) 2006-07-13 2006-07-13 Mehrschichtkörper mit Mikrooptik

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EP1878584A2 EP1878584A2 (fr) 2008-01-16
EP1878584A3 EP1878584A3 (fr) 2008-07-23
EP1878584B1 true EP1878584B1 (fr) 2014-04-30
EP1878584B2 EP1878584B2 (fr) 2019-10-23

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US (1) US20080024846A1 (fr)
EP (1) EP1878584B2 (fr)
CA (1) CA2593340C (fr)
DE (1) DE102006032660A1 (fr)
DK (1) DK1878584T4 (fr)
ES (1) ES2486341T5 (fr)
RU (1) RU2435675C2 (fr)

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US12005728B2 (en) 2019-05-20 2024-06-11 Crane & Co., Inc. Use of nanoparticles to tune index of refraction of layers of a polymeric matrix to optimize microoptic (MO) focus

Also Published As

Publication number Publication date
EP1878584A3 (fr) 2008-07-23
CA2593340C (fr) 2015-10-20
DK1878584T4 (da) 2020-02-03
US20080024846A1 (en) 2008-01-31
DE102006032660A1 (de) 2008-01-17
ES2486341T5 (es) 2020-05-22
ES2486341T3 (es) 2014-08-18
RU2007126660A (ru) 2009-01-20
EP1878584B2 (fr) 2019-10-23
DK1878584T3 (da) 2014-07-07
EP1878584A2 (fr) 2008-01-16
RU2435675C2 (ru) 2011-12-10
CA2593340A1 (fr) 2008-01-13

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