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WO2019076805A1 - Élément de sécurité ou document de sécurité - Google Patents

Élément de sécurité ou document de sécurité Download PDF

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Publication number
WO2019076805A1
WO2019076805A1 PCT/EP2018/078056 EP2018078056W WO2019076805A1 WO 2019076805 A1 WO2019076805 A1 WO 2019076805A1 EP 2018078056 W EP2018078056 W EP 2018078056W WO 2019076805 A1 WO2019076805 A1 WO 2019076805A1
Authority
WO
WIPO (PCT)
Prior art keywords
microlenses
security
security document
security element
imaging structure
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.)
Ceased
Application number
PCT/EP2018/078056
Other languages
German (de)
English (en)
Inventor
Robert Stewart
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer AG
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
Priority claimed from DE102017218805.7A external-priority patent/DE102017218805B3/de
Priority claimed from DE102018201871.5A external-priority patent/DE102018201871B3/de
Application filed by Koenig and Bauer AG filed Critical Koenig and Bauer AG
Publication of WO2019076805A1 publication Critical patent/WO2019076805A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B42D25/30—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
    • B42D25/351—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
    • B42D25/369—Magnetised or magnetisable 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/382—Special inks absorbing or reflecting infrared light
    • 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
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • 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
    • 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
    • B42D25/425—Marking by deformation, e.g. embossing
    • 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

Definitions

  • the invention relates to a method for producing a security element or security document according to claim 1 as well as the security element or security document itself, comprising an arrangement of a plurality of microlenses and a printed image underlaid by this arrangement, according to claim 68.
  • WO 2017/081 447 A1 discloses a method for producing a picture element array for an optically variable security device. The method comprises:
  • Lenticular device known with an array of lenticular
  • Image strips are arranged so that in different viewing directions, a corresponding image strip from each sentence on each of the lens-shaped
  • the image strips are at least partially defined by a relief structure.
  • US 2009/0310185 A1 discloses a security element or a security document, each having an arrangement with a print image and one of several plano-convex ones Microlenses existing optical imaging structure removed and a method for producing this security element or this security document.
  • DE 1 1 2013 002 927 T5 discloses a security element comprising: a plurality of focusing elements, a plurality of image regions, wherein each image region is associated with a focusing element, each image region is printed with at least two layers, the first layer is from a reference axis in the image region is offset by a first predetermined amount, the second layer is offset from a reference axis in the image region by a second predetermined amount, each layer has a different color, and each image region comprises at least a first and a second subregion, wherein a first image in one first viewing angle from the first
  • Subregion and a second image in a second viewing angle range from the second subregion is formed.
  • Total thickness of the film material is less than 50 ⁇ ; the lenses being one
  • the lenses having an F-number less than 4, say less than 2; with a space between the lenses that does not directly contribute to the synthetic enlargement of the images; the microimages being formed by the voids in a microstructure or the solid areas; wherein there is an optical spacer between the lenses and the microimages, the optical spacer being a separate substrate; whereby the synthetically magnified image appears to rest on a plane in space that is optically deeper than the thickness of the film material and the effect that the synthetically magnified image appears to rest on a plane in space that is optically deeper than that Thickness of the film material is visible from all azimuthal viewing positions and over a wide range of height positions, from the vertical height down to a flat elevation angle, which is typically less than 45 °; the synthetically magnified image being its shape or shape or combinations thereof
  • microlenses form an optically imaging structure in the form of a geometrical figure, wherein several within the area of the geometric figure
  • WO 2017/177 276 A1 discloses a method for producing an arrangement of microlenses, comprising a transparent substrate, having a plurality of first lens elements on a first side of the substrate, enlarging the first picture elements on a second side of the substrate, and US Pat a variety of second
  • Lens elements on the second side of the substrate which enlarge second pixels on the first side of the substrate, wherein the plurality of first and second lens elements and first and second pixels are strips of
  • US 2016/0176221 A1 discloses a safety device which comprises: an array of focusing elements, each focusing element thereto adapted to focus light in at least two orthogonal directions, the focusing elements being arranged on a regular two-dimensional grid; and an arrangement of elongated picture elements overlapping the array of focusing elements configured such that each focusing element can direct light from any one of a respective set of at least two elongate picture elements to the viewer, depending on the viewing angle; wherein in a first region of the security device, the elongated picture elements extend along a first direction and in a second region of the
  • DE 10 2006 029 852 A1 discloses a method for applying a colored or colorless microstructure to a carrier, in which
  • a mold is provided whose surface is an array of
  • a document substrate having at least two transparent or translucent windows spaced apart from each other and a device comprising a transparent substrate carrying: i) a uniform array of micro-focusing elements on a first surface, the focusing elements defining a focal plane; ii) a corresponding first array of microimage elements in a first color and in a plane substantially coincident with the focal plane of the focusing elements; and, iii) a corresponding second array of microimage elements, in a color other than the first color, and in a plane substantially coincident with the focal plane of the focusing elements, the pitches of the micro-focusing elements and the first and second arrays of microimage elements and their relative positions are such that the array of micro-focus elements cooperates with each of the first and second arrays of micro-pixels to generate respective magnified versions of the micro-pixels of each array due to the moiré effect; and wherein at least a portion of the first array of microimage elements is not overlapped by the second and at least a portion of the second array of the
  • Microimage elements are not overlapped by the first one; wherein the device is incorporated into the document substrate or applied thereto in alignment with the at least two windows, the device being registered with respect to the document substrate such that the enlarged version of the first microimage element array is visible through the first of the two windows and the enlarged version of the second
  • Micro picture element array is visible through the second of the two windows, wherein the transition between the two micro picture element arrangements by the
  • Document substrate is hidden between the two windows.
  • a flexible plastic film for decorative purposes is known, with three-dimensional dynamic color effect, wherein it consists of a transparent, about 0.1 to 1 mm thick, flexible plastic screen foil on the still several individual films can be applied, wherein the grid is composed of a plurality of juxtaposed, extending over the uppermost film cylindrical lenses and on the underside of the grid foil and / or between the individual foils per a number of color lines in the same or slightly different numbers per
  • Length unit as the cylindrical lenses are printed so that they are at a certain angle to the latter.
  • a reflective printed article is known from US 2003/0 205 895 A1, comprising: a substrate having a top surface; a graphic image formed over the top of the substrate; and a transparent textured pattern of a plurality of lines printed in portions over a surface of the graphic image and / or over a portion of the top surface of the substrate adjacent the graphic image, wherein the plurality of lines of the portion are all substantially parallel to each other are aligned in a first direction and characterized in that the plurality of lines of a directly adjacent portion are all substantially parallel to each other and aligned in a second direction different from the first direction, such that the plurality of parallel ones Lines in each directly adjacent section reflect and / or break the light in different directions.
  • US 2015/0146297 A1 discloses a security device having a printed lens assembly disposed on a first surface of a substrate and a microimage assembly underlying the printed lens assembly, wherein a synthetic image of portions of the microimages is passed through the security device further comprises at least one tactile element disposed on the first surface of the substrate having a height greater or lesser than the printed lenses, the at least one tactile element being mounted on the printed lens assembly and / or or aligned with the microimage array.
  • AU 2017/101 215 A4 is a method of manufacturing a
  • a security device comprising: providing a substrate having a first and a second side; Applying an ablative coating to the first side of the substrate; Directing laser light through a mask that transmits laser light
  • WO 201 1/017 749 A1 discloses a method for forming a polarizing liquid crystal device, comprising the step of embossing at least one relief structure in a radiation-curable liquid crystal material, wherein the embossing step also aligns the liquid crystal material with a predetermined polarization pattern.
  • the method also includes curing the embossed liquid crystal material, wherein the curing and embossing steps are performed substantially simultaneously.
  • a polarizing liquid crystal device including at least one relief structure in an embossed region or regions of a radiation-curable liquid crystal device.
  • the relief structure may comprise a diffractive structure.
  • the liquid crystal material may be aligned with a predetermined polarization pattern in the embossed region or embossed regions, wherein the predetermined polarization pattern includes two or more regions of different polarizations.
  • an identity card is known, the information applied by means of a laser beam information in the form of patterns, letters, numbers and / or images wherein the identification card has differently colored layer areas arranged one above the other, which are at least partially interrupted by visually recognizable information.
  • DE 1 1 000 000 957 T5 discloses a lens array for imaging a plurality of picture elements in an object plane, wherein the lens array contains a multiplicity of microlenses which lie in or on one side of a transparent or
  • each microlens having a set of lens parameters, the measurement thickness and / or at least one
  • Lens parameters are optimized so that each microlens has a focus size in the object plane, which is substantially equal to the size of the pixels in the
  • the measuring thickness of the lens array is preferably smaller than the focal length of all microlenses.
  • the picture elements can z. B. take the form of points or lines.
  • the lens array of DE 1 2010 000 957 T5 is designed in such a way that in a cone or angle field of the light incident in the respective microlens in the direction of the picture elements parallel to the main plane of the respective microlens cutting plane always arranged only one of the juxtaposed pixels is, whereby for a viewing the print image under a certain viewing angle viewer at a given time always only a single frame is perceptible.
  • WO 2007/042919 A2 discloses a printing unit with printing units, by means of which substrate to be printed on a same printing location on a same page at the same time is printed with multi-colored partial printing images originating from a plurality of printing cylinders and superimposed on each other.
  • EP 2 996 885 B1 a method for producing a security document is known wherein application of a curable material to a first region of the substrate on its first surface, shaping of the curable material such that its surface remote from the substrate to the contours of a follows an optically variable effect-generating relief structure, and curing the
  • the invention has for its object to provide a method for producing a
  • Security element or a security document as well as to create the security element or security document itself, which each allow complex and / or differentiated animations.
  • the object is achieved by a method for producing a security element or a security document having the features of claim 1 as well as by the security element or security document itself, comprising an arrangement of a plurality of microlenses and a printed image underlaid by this arrangement, each having the features according to claim 68.
  • the respective dependent claims each show advantageous embodiments and / or developments of each found solution.
  • Fig. 1 shows a document having an optically imaging structure
  • Fig. 2 is a greatly enlarged sectional view of an arrangement having a
  • FIG. 3 shows the arrangement according to FIG. 2 with a light incidence from a second viewing angle
  • FIG. 4 is a plan view of an optical imaging structure formed in the form of a geometric figure
  • Fig. 5 is a plan view of an assembled from lens grids optically
  • FIG. 6 shows an optically imaging structure consisting of a group of microlenses arranged in a grid of square grid cells
  • FIG. 7 shows an optically imaging structure consisting of a group of microlenses arranged in a grid of hexagonal grid cells
  • FIG. 8 shows a picture element, which can be perceived by a viewer through a microlens, of a printed image underlying the microlens
  • Fig. 9 is an imperceptible by a viewer through a microlens
  • Fig. 10 periodically recurring picture elements in unequal phase to one
  • Fig. 1 a template for the production roughened areas between each
  • FIG. 12 shows microlenses positioned relative to picture elements of a printed image
  • FIG. 13 shows production steps for the formation of microlenses with areas not covered by these microlenses on the surface of the geometric figure, in particular white-colored areas;
  • Fig. 15 shows an arrangement of masked color zones
  • 16 shows an optically imaging structure consisting of several in a grid
  • FIG. 17 shows an arrangement for forming structures in the micrometer range in a picture element of a microlens to be printed image.
  • FIG. 18 shows a schematic representation of a collective printing unit for the simultaneous two-sided multi-color printing
  • Fig. 19 is a schematic representation of a printing unit with a than
  • Fig. 20 is a schematic representation of a printing unit with a than
  • the term "lens” is used to denote light that is transparent to light Component with at least one arranged in the beam path of the light
  • refractive surface The term light is understood here as the visible part of the electromagnetic radiation to the human eye. in the
  • Electromagnetic spectrum includes the range of light wavelengths from about 380 nm (purple) to 780 nm (red). The following are based on converging lenses, ie incident light bundling lenses, in particular plano-convex lenses.
  • Preferred designs are, on the one hand, rotationally symmetrical spherically or aspherically formed lenses and, on the other hand, axisymmetric rod-shaped lenses, the respective axis of symmetry of the relevant lens and its optical axis in each case being congruent.
  • the optical axis is thus an i. d. R. through the center of curvature of a convex lens surface extending straight line.
  • the optical axis is perpendicular to it.
  • the curvature of a refractive z. B. convex surface is indicated by its radius of curvature, wherein the radius of curvature has its origin on the optical axis.
  • a plane lens surface is defined by an infinite radius of curvature.
  • Rod-shaped lenses are designed in the form of either a rod length halved according to either straight circular cylinder or elliptical cylinder, wherein the respective axis of symmetry of such a lens extends orthogonal to their respective rod length.
  • the refractive surface is as a
  • An aspherically formed lens has at least one refractive surface deviating from the spherical or planar shape.
  • the shape of rotationally symmetric aspherical surfaces is usually given as a conic (circle, ellipse, parabola, hyperbola) plus a correction polynomial for higher order deformations.
  • a lens has two cut from the beam path of the light surfaces, so-called envelope surfaces, wherein with respect to the light bundling is defined by the fact that the light enters a plano-convex convex lens respectively at their convexly curved envelope surface and the light exit from this lens takes place at its planar envelope surface.
  • the envelope surfaces are in each case interfaces between different media in which the light propagates in each case.
  • One of these media is formed by the material, ie the material of the lens in question.
  • At least one other medium is the generally air-filled space in which the lens in question is located. Since at least two of the arranged in the beam path of the light media at least their respective optical material properties are different from each other, the light is refracted at the interface between these adjacent media.
  • a refraction of light in particular at the curved envelope surface, takes place on at least one of the envelope surfaces of the respective lens.
  • Refraction-related optical material property is expressed by the refractive index of the respective medium.
  • the refractive index is a dimensionless physical quantity that indicates by what factor the
  • Wavelength and the phase velocity of the light in the medium in question are smaller than in a vacuum.
  • the medium with the higher refractive index is called the more dense one.
  • the Abbe number also called the Abbe number, is a dimensionless quantity for the characterization of the optical dispersive
  • a lens indicates how much their refractive index changes with the wavelength of light.
  • the property of a lens to be able to produce an optical image from an object viewed through the relevant lens depends on the refractive index of the material of the respective lens and on the shape of its respective enveloping surfaces forming between different media.
  • Symmetry axis of the lens concerned arranged level In a thin lens, in which their largest along the axis of symmetry extension, ie, the thickness of the lens is considered to be very small compared to the radius of curvature of its convex hull surface, because the radius of curvature of the convex hull z. B. at least five times larger than this thickness, can with mostly sufficient
  • Accuracy for a consideration of properties of the lens in question are based on only a single major level. In a plano-convex lens, this major plane coincides with the planar lens surface.
  • the focal length of a lens is the distance between the main plane of the lens in question and its focus
  • focal point which is to be understood here by the focus of a lens, an intersection of the lens bundled, parallel to this lens incident light rays.
  • the light rays incident in parallel into the lens do not necessarily coincide parallel to their optical axis, but under an arbitrary, in particular acute, angle of incidence with respect to the main plane of the respective lens.
  • a plane orthogonal to the optical axis in focus is called focal plane or focal plane.
  • the aperture or opening width of a lens designates its free opening or its diameter, through which light beams can be received unhindered and corresponds at most to the lens width.
  • the point which lies at the intersection of the optical axis with the enveloping surface of the lens in question is called the vertex.
  • the vertex is located furthest away from the focus of this lens on the enveloping surface serving for light entrance.
  • a lenticular which is also referred to as a lenticular.
  • Several lenses arranged in a latticed lens group and / or a plurality of lenses arranged in a lenticular grid each form in their respective composite an optically imaging structure in the form of a geometric figure which extends over a plane or curved surface.
  • the surface of the optically imaging structure may have any desired contour, for. B. rectangular, round, oval or polygonal. In geometry, a geometric figure is understood as a set of points.
  • the optically imaging structure is at least one
  • Subset of the geometric figure forming points each arranged a lens.
  • only one or more respective lattice-type lens groups or only one or more lenses arranged in a lenticular array as well as these two lens arrangements can be arranged mixed together with the respective other lens arrangement, so that both lattice-like lens groups in the same optically imaging structure as well as arranged in a lenticular lenses are arranged together.
  • both lattice-like lens groups in the same optically imaging structure as well as arranged in a lenticular lenses are arranged together.
  • Lens raster concerned by the respective direction of the rod length of the construction of the lenticular lens involved.
  • a microlens is a miniaturized form of a conventional lens.
  • the term microlens is to be understood here as meaning a lens whose lens width is less than 100 ⁇ m and preferably in the range between 20 ⁇ m and 65 ⁇ m.
  • Microlenses have a focal length of less than z. B. 100 ⁇ , preferably at most 95 ⁇ .
  • Microlenses are industrially manufacturable today.
  • Microlenses made of a plastic or resin can, for. Example, using a (spray) casting or (injection) embossing process or printing process can be produced.
  • Microlenses existing optically imaging structures are also referred to as micro-optical structures.
  • an optically imaging structure formed in particular of microlenses is arranged in combination with a preferably areally formed print image or if, for example, by this optically imaging structure z. B. is applied to a print image exhibiting substrate or is, can be produced for the print image by the optically imaging structure viewing viewer various effects.
  • the perception presented to the observer by different viewing angles is also called a lenticular image.
  • the I. d. R. surface print image is z formed on the preferably two-dimensional substrate.
  • the substrate is z. B. a printing material or as a Formed sheet.
  • the print image is z. B. applied in a punctiform or linear grid on the substrate.
  • the print image is therefore z. B. from several, in particular a plurality of pixels and / or lines.
  • Pixel size or a line thickness is in a range of less than 100 ⁇ , preferably less than 50 ⁇ , in particular less than 20 ⁇ , z. B. in the range of about 5 ⁇ to 10 ⁇ .
  • Pixel size of pixels and / or the line width of lines each used to form one together with an optical imaging structure is assumed that the pixel size of pixels and / or the line width of lines each used to form one together with an optical imaging structure
  • Print image involved, z. B. each maximum as large, preferably less, in particular less than half as large as the respective lens width of the lenses involved in the construction of the relevant optically imaging structure.
  • the z. B. two pixels or two lines must have from each other in order to perceive them as separate pixels or lines can.
  • the resolution of the naked human eye varies from person to person. Normal-sighted adults at a distance of 25 cm usually still structures at a distance of 150 ⁇ differ. This corresponds to a viewing angle of about 2 angular minutes, which is referred to as angular resolution. With weak contrasts, the visual acuity of the human eye decreases markedly, with visual acuity representing the reciprocal of the resolution.
  • the lens width of a microlens is thus usually less than the resolution of the naked eye of a normal adult.
  • the substrate is or is printed with a plurality of printing inks, for. B. are on the substrate designated as primary colors inks red, green, blue and optionally formed the ink black.
  • a printed image usually consists of an arrangement of several at different
  • each picture element preferably has a plurality of pixels or lines and, as a rule, extends over a length of less than 100 ⁇ m.
  • Each picture element or a group of neighboring picture elements forms z.
  • the individual picture elements are arranged in a printed image, as a rule, to form a print motif which determines the information content of a printed image. Due to its limited usually insufficient resolving power, single picture elements used in conjunction with a microlens are usually not perceived by the naked human eye singularly.
  • a perceived by a person color impression of the printed image or at least a portion of this printed image is created by taking place in the eye and brain of the observer additive color mixing printed in the respective pixels in each case different colors in pixels and / or lines.
  • An overlay of two primary colors results in the color impressions yellow, cyan and magenta, which are called secondary colors.
  • a superposition of all three primary colors gives the color impression white.
  • a color register, ie a Passerhaltmaschine, ie a fit of pixels and / or lines of different inks in their relative arrangement to each other is in the embodiments of the invention considered here each less than 10 ⁇ and is in particular in the range of about 5 ⁇ .
  • the optically imaging structure provided in connection with the exemplary embodiments of the invention considered here is preferably arranged in combination with pixels and / or lines of different printing inks.
  • the printed image is or is preferably produced as or by superposing a plurality of partial printed images, wherein several or preferably each of the partial printed images z. B. is printed in a different ink or is. In this case, the overlay by successive
  • Partial print images on a printing element e.g. On a cylinder, and simultaneous delivery to the substrate.
  • the partial print images in turn each consist of pixels and / or lines, the pixel size of these pixels and / or the line thickness of the respective lines are each in the micrometer range, z. B. in the range of less than 20 ⁇ .
  • An arrangement consisting of at least one print image and at least one optically imaging structure allows a viewer viewing the print image to perceive several different individual images at different viewing angles, a sequence of individual images entering the viewer's perception
  • Animation is created.
  • Each of these frames is also referred to as a frame.
  • the individual perceptible by the viewer at a certain viewing angle individual images formed by a defined by the optically imaging structure selection from the amount of perceptible at the respective positions of the microlenses due to the local at least one pixel or the local image elements partial pressure images, wherein the on a position of the printed image related color
  • the optically imaging structure arranged in combination with a printed image is accordingly an optical masking of the partial printing images arranged in coincidence with the surface of the optically imaging structure and participating in the relevant printed image.
  • Microlenses existing optical imaging structure proposed in which at least one microlens of the relevant optical imaging structure side by side a plurality of, preferably more than three, in particular between five and ten picture elements are arranged, these picture elements are arranged between the extension of the lens width of the respective microlens and their focus in a plane parallel to the main plane of the respective microlens cutting plane, wherein the cutting plane a cone or a Angle field of each incident through the lens width of the respective microlens in the direction of juxtaposed pixels incident light is arranged, wherein in the sectional plane within the cone or the angular field simultaneously several mutually different pixels
  • each of these microlenses along the print image has a lens width preferably less than 100 ⁇
  • the print image has a plurality of pixels
  • at least one of Microlenses of the respective optically imaging structure are each arranged a plurality of picture elements
  • said plurality of each arranged under at least one of the microlenses of the respective optically imaging structure pixels are arranged side by side along the lens width and each in the direction of the lens width each have a shorter length than the respective
  • Lens width extend, wherein between the extension of the lens width of the microlens in question and its focus in a cone or in the angular field of each incident through the lens width of the respective microlens in the direction of juxtaposed pixels parallel to the main plane of the respective microlens cutting plane parallel to several, preferably at least three, in particular more than three, each different picture elements
  • Print motifs creates sliding frame transitions.
  • the substrate is z.
  • a fibrous substrate especially paper, or a film, preferably a polymer film.
  • the substrate may be opaque or transparent.
  • the substrate may be single-layered or multi-layered, in particular multi-layered in sections.
  • Various layers of a multilayer substrate may be formed of different materials, for. B. a layer of paper and another layer of a polymer film.
  • the substrate or at least one respective layer of this substrate has a material thickness, d. H. Thickness z. B. of less than 100 ⁇ ,
  • a formed on the substrate printed image has a layer thickness z. B. of less than 10 ⁇ , preferably of less than 5 ⁇ , in particular in the range of 1 ⁇ to 2 ⁇ .
  • the substrate can be printed on one side or on both sides.
  • the arrangement of printed image and optically imaging structure is in the preferred embodiment of the invention part of a security element or a document, in particular a security document.
  • These documents include, for example, banknotes, credit cards, checks, securities, stock certificates, passports, identity cards, driver's licenses, title deeds, travel documents such as airline tickets or banknotes
  • FIG. 1 shows by way of example a document 02, in particular a security document 02, on which at least one security element 01 is applied.
  • the document 02 and / or the relevant security element 01 have at least part-surface, preferably over the entire surface, at least one optically imaging structure 03, wherein the respective optically imaging structure 03 preferably as one of microlenses 1 1 formed
  • micro-optical structure 03 is formed.
  • the relevant optically imaging structure 03 at least partially covers one formed on the document 02 or
  • FIG. 2 shows by way of example, in particular as a section of the security element 01 or document 02 shown in FIG. 1 in a greatly enlarged sectional view, an arrangement with a single plano-convex microlens 11 which is integrated into a group or a grid of microlenses 11 is.
  • the respective microlens 1 1 has an axis of symmetry 12, which also forms the optical axis 12 of this microlens 1 1 at the same time.
  • the microlens 1 1 may be rotationally symmetrical spherical or aspherical or it is z.
  • the microlens 1 1 z. B. made of a transparent plastic or resin injection or casting or embossing or printing technology.
  • the microlens 1 1 has a convex enveloping surface 13 serving for the entry of light, wherein a bundle of parallel light beams 14 strikes this enveloping surface 13.
  • the microlens 1 1 has two symmetric axis to its optical axis 12
  • the lens width 18 of a microlens 1 1 is less than 100 ⁇ .
  • the two boundary points 16; 17 of the convex envelope surface 13 lie in an orthogonal to the optical axis 12 of the respective microlens 1 1 arranged plane, which is also referred to as the main plane 19 of this microlens 1 1. 4, the main plane 19 forms a planar envelope surface 21 of the microlens 1 in question.
  • the focal length 22 of a microlens 1 1 is below 100 ⁇ .
  • a plane arranged in the focus 23 orthogonal to the optical axis 12 is called the focal plane 24.
  • the microlens 11 is part of a lens array or a lenticular grid, in which a plurality of microlenses 11 is preferably arranged, in each case, without gaps and without overlapping, with respect to a specific surface of any desired contour.
  • the lens array or the lenticular grid is disposed on a substrate 26, wherein the substrate 26 z. B. as a fibrous substrate z. B. with a transparent window, in particular paper, or as a film, preferably a polymer film is formed.
  • the substrate 26 has a material thickness 29 or thickness 29 z. B. of less than 100 ⁇ , preferably of less than 50 ⁇ , in particular about 25 ⁇ on.
  • the substrate 26 is preferably part of a
  • Security element 01 or a document 02, in particular one
  • the substrate 26 is transparent at least in the area covered by the planar envelope surface 21 of the respective microlens 11.
  • a printed image 27 of low layer thickness 36 z. B. of less than 10 ⁇ applied this printed image 27 has a plurality of individual each different image elements 28.
  • These individual pixels 28 are formed very small area and extend parallel to the lens width 18 over only a few micrometers, z. B. over a maximum of 10 ⁇ . Therefore, it is possible to have several, for. B. ten such picture elements 28a to 28j in the area covered by the plane envelope surface 21 of the microlens 1 1 z. B.
  • At least one of these picture elements 28a to 28j preferably has pixels and / or lines printed in different printing inks, in particular, depending on the number of z. B. juxtaposed pixels 28a to 28j whose respective pixels a pixel size and / or their lines have a line thickness each in the range of a few microns, preferably in the range of less than 10 ⁇ .
  • the print image 27 exists preferably from a superimposition or superimposition of a plurality of partial printed images each printed in different printing inks.
  • Microlens 21, in particular juxtaposed picture elements 28a to 28j preferably each belong to different print motifs.
  • Microlens 1 1 and their focus 23 disposed in a plane parallel to the main plane 19 of the respective microlens 1 1 sectional plane 31, wherein the cutting plane 31 a cone 32 or an angular field 32 of each through the lens width 18 of the respective microlens 1 1 in the direction of z.
  • juxtaposed pixels 28a to 28j incident light is arranged intersecting, wherein in the cutting plane 31 within the cone 32 or the angular field 32 at the same time preferably more of the
  • FIG. 3 has the same arrangement with a printed image 27 and an optically imaging structure 03 consisting of a plurality of plano-convex microlenses 11 as in FIG. 2. Due to the different from the first viewing angle 33 second viewing angle 34 are in the In the embodiment shown in FIG. 3, for a viewer viewing the print image 27, only the image elements 28d to 28h are perceptible, but the others are not.
  • Image elements 28a to 28j formed by preferably each printed in different printing inks pixels and / or lines.
  • the respective pixel size of the respective pixels and / or the line thickness of the respective lines is in each case formed significantly smaller than the lens width 18 of the respective microlens 11, preferably in the range of a few micrometers, in particular in the range of less than 10 ⁇ m.
  • at least one of these picture elements 28a to 28j has pixels and / or lines, in the printing of which particular special printing fluids, in particular inks, are used whose optical properties are different from conventional printing fluids. in particular differ from conventional inks or inks.
  • These special pressure fluids are, for.
  • inks which are not visible to the naked human eye of a normal-sighted viewer without an excitation lying outside of the human eye visible electromagnetic spectrum, in particular an ink absorbing infrared radiation or ink reflecting infrared radiation or converting to visible infrared radiation Ink or an ultraviolet ray fluorescent ink or a magnetic ink.
  • inks which are not visible to the naked human eye of a normal-sighted viewer without an excitation lying outside of the human eye visible electromagnetic spectrum, in particular an ink absorbing infrared radiation or ink reflecting infrared radiation or converting to visible infrared radiation Ink or an ultraviolet ray fluorescent ink or a magnetic ink.
  • These invisible in particular under daylight conditions inks can be perceived by a corresponding excitation as the other inks in different hues, z. B. in the color ranges blue, green or red.
  • This excitation is preferably an electromagnetic or magnetic excitation.
  • ink is understood here to mean an intensively colored and colored liquid, usually from a solution or from dispersions of colorants in water or other solvents, these solvents containing little or no binders in the case of inks formed as an ink.
  • Colorants are coloring substances, eg. As pigments and dyes, which may be inorganic or organic, natural or synthetic.
  • printing inks are colorant-containing mixtures which are transferred by means of a printing form to a substrate, ie to a printing material.
  • Inks contain inorganic and organic pigments, eg. Example, titanium dioxide as a white pigment or color black as a black pigment, and binders that envelop the pigments. Both conventional inks and inks, including under daylight conditions to the human eye
  • the aforesaid infrared (IR) reactive special inks are e.g. B. used in conjunction with electromagnetic radiation from the near infrared (NIR), wherein a radiation having a wavelength in the range between 780 nm and 2000 nm is preferably used, in particular in the range between 780 nm and 1200 nm.
  • a infrared radiation (IR; NIR) reacting ink contains z.
  • inorganic i. d. R. Pigment-shaped luminophores that emit radiation in the visible and / or infrared range (NIR) after energy absorption. Infrared radiation into the visible converting ink contains so-called anti-Stokes pigments.
  • Ultraviolet radiation short UV or UV radiation
  • the spectrum in the ultraviolet according to widely accepted classification includes the wavelengths from 100 nm to 380 nm, d. H. from the short-wave range to the limit of visible light.
  • An ultraviolet-ray fluorescent ink has fluorescent coloring pigments which intensely illuminate under ultraviolet irradiation and optionally evaluate the ultraviolet rays of the daylight.
  • a magnetic ink is understood to mean one in particular with iron oxide particles staggered ink. These particles can be magnetized and thus magneto-optically analyzed and read out by means of an arrangement with an external magnetic field which is different from the earth's magnetic field and has the substrate 26 and the optical imaging structure 03.
  • An arrangement which is advantageous with regard to machine readability and comprises a printed image 27 applied to a substrate 26 and an optical image-forming structure 03 covering at least parts of the printed image 27 provides that the optically imaging structure 03 has a group or a grid of several plano-convex microlenses 11, wherein the plane Enveloping surface 21 of the microlenses 1 1 facing the substrate 26, wherein the arranged on the substrate 26 print image 27 is preferably disposed on the optically imaging structure 03 side facing and at least one
  • Image element 28a to 28j having at least one pixel and / or a line, said pixel and / or this line is formed by a pressure fluid pressure fluid, wherein the pressure fluid only due to a lying outside the visible to the human eye electromagnetic spectrum excitation for the
  • This pressurized fluid is preferably as one
  • the relevant at least one pixel 28a to 28j of the machine-readable print image 27 is an integral part of the relevant arrangement z. B. on a security element 01 or a document 02, in particular on a security document 02.
  • the outside of the visible to the human eye electromagnetic spectrum excitation of the pressurized fluid takes place with respect to the at least parts of the
  • the respective pixel size of the pixels in question and / or the line thickness of the respective lines are each greater than the lens width 18 of the respective microlens 1 1 formed in such an arrangement ,
  • a further embodiment provides that in the relevant arrangement of substrate 26 and optically imaging structure 03 at a plurality of individual positions in the plurality of plano-convex microlenses 1 1 having group or in the multiple plano-convex microlenses 1 1 having grid of the respective optically imaging structure 03 the respective microlens 1 1 remains unausge soft and at the relevant defect at least one pixel 28a to 28j of the printed image 27 is arranged with at least one pixel and / or a line, said pixel and / or this line by printing only by the outside of the for human eye visible electromagnetic spectrum lying stimulus for that
  • human eye visible pressure fluid is formed.
  • the under normal conditions for the human eye invisible pressure fluid is or is therefore applied or arranged at selected defects in the respective optical imaging structure 03.
  • the arrangement of the substrate 26 and the optically imaging structure 03 can have a printed image 27 which accommodates a normal-view observer viewing the printed image 27 through the optically imaging structure 03 with the naked eye
  • at least one picture element 28a to 28j of at least one partial image of the print image 27 having a plurality of partial print images to be formed by machine reading is formed by a batch, this mixture being a subcutaneous image for the human eye
  • a substrate 26 having the printed image 27 and an optical image-forming structure 03 in a first region covered by the optical imaging structure 03 are arranged therein Image elements 28a to 28j of the printed image 27 in each case by a visible to the human eye, especially under daylight conditions and in a second area covered by the optically imaging structure 03 area arranged therein pixels 28a to 28j of the print image 27 respectively by only one of the outside of the the human eye visible electromagnetic spectrum lying excitation for the human eye visible pressure fluid are formed.
  • Fig. 4 shows a z. B. on a security element 01 or a document 02, in particular a security document 02 (Fig. 1) applied optically imaging structure 03 in the form of a geometric figure 37, the preferably flat surface at least substantially, d. H. considered macroscopically, a z. B. rectangular contour 38 has.
  • the optically imaging structure 03 which extends over the entire surface of the geometric figure 37, has a large number of preferably micron-shaped microlenses 11, each of which has a plano-convex shape. In this case, a first subset of these microlenses 1 1 in a z. B. square grid cells 39 existing
  • the grid cells 39 are defined by a set of grid points 41, the
  • the specific number of grid points 41 and grid lines 42 is dependent on the shape of the selected grid. In the case of square grid cells 39, there are respectively four grid points 41 and four grid lines 42; in the case of hexagonal grid cells 39, six are each.
  • the lattice points 41 are respectively at points from the set amount of the optically imaging Structure 03 descriptive geometric figure 37 formed. At each of the lattice cells 41 spanning a grid cell 39, a microlens 11 is arranged, wherein the apex 44 (FIG.
  • a second subset of the respective optically imaging structure 03 belonging microlenses 1 1 is arranged in at least one, preferably in a plurality of lens grids 43 having a plurality of each axisymmetric rod-shaped microlenses 1 1, said arranged in a lenticular 43 microlenses 1 1 each orthogonal to their rod length preferably in each case without gaps and without overlapping strung together.
  • these lenticular 43 z. B. on each one different orientation.
  • Orientation of formed within this surface lens grid 43 may also be arranged diagonally.
  • the arranged within the surface of the same optically imaging structure 03 lenticular grid 43 are in their respective shape and / or in their respective area ratio z. B. differently formed.
  • Lens grids 43 composite optically imaging structure 03.
  • several of each consisting of a plurality of microlenses 1 1 lenticular grid 43 are each formed as a preferably square rectangular area each in a
  • Rectangular surface formed lens raster 43 are in each case in at least one line and / or in at least one column in particular each gapless and overlapping arranged. Adjacent lens louvres 43 are each arranged in mutually different orientation, with lenticular screen 43 of the same first
  • the plurality of lenticular screens 43 forming the optically imaging structure 03 jointly form an underlaid, preferably multicolored print image 27, this print image 27 preferably consisting of a superimposition or a superimposition of several partial print images printed in different print colors, respectively is formed in the form of several pixels and / or lines.
  • the print image 27 is z. B. formed such that a frame, d. H. a single frame z. As an animation, from two
  • Each of the lenticular screens 43 participating in the optically imaging structure 03 has an edge length in the range of 100 ⁇ m to a maximum of 300 ⁇ m, preferably of approximately 250 ⁇ m.
  • the respective lens width 18 of the microlenses 1 1 arranged in the respective lens grids 43 of this optically imaging structure 03 is less than 100 ⁇ m and is preferably in the range between 20 ⁇ m and 65 ⁇ m. Due to limited in the range of about 150 ⁇
  • Resolving capacity of the naked human eye normal-sighted adult can at a distance of z. B. 25 cm
  • the plurality together the optical imaging structure 03 forming lenticular grid 43, ie their respective images of the respective affected pixels 28 of the underlying print image 27 are not individually perceived, but the respective of a particular individual lenticular image 43 imaged pixels 28 of the respective printed image 27th merge in the perception of the observer viewing the print image 27 with at least one of the respective images of lens grids 43, which are arranged adjacent to the particular lens grid 43 relative to this optically imaging structure 03.
  • the optically imaging structure 03 illustrated in FIG. 5 by way of example in the form of a square-shaped geometric figure 37 total z. B.
  • alternately arranged lens grids 43 measures side lengths each z. B. in the range of 0.6 mm to 1, 5 mm, preferably of about 1 mm.
  • An advantage of the arrangement comprising a printed image 27 and an optically imaging structure 03 formed in accordance with FIG. 5 is that two-dimensional lenticular images can be generated by a group of one-dimensionally oriented lens grids 43.
  • geometric figure 37 formed optical imaging structure 03 is used with at least some of the features shown in FIG. 4 or 5 features. If differently oriented lenticular screens 43 are used within the area of an optically imaging structure 03 embodied as a geometrical figure 37, as is shown by way of example in FIGS. 4 and 5, the printing process is to be carried out in the production process such that the underprinted print image 27 of FIG above type whose color register is adhered to two-dimensional, z. B. both in the transport direction of the moving through the printing press substrate and across it. This results in that the Passerhaltmaschine participating in the construction of the relevant printed image 27 each printed in different printing colors pixels and / or lines in two orthogonal directions is less than 10 ⁇ and in particular in the range of about 5 ⁇ .
  • FIG. 6 shows an optically imaging structure 03 consisting of a group of microlenses 1 1 each of rotationally symmetrical spherical or rotationally symmetrical aspherical design, which are arranged without gaps and without overlapping in a grid of square grid cells 39, ie edge points 16; 17 adjacent microlenses 1 1 are in contact with each other.
  • the square grid cells 39 have four grid points 41 which are interconnected by two pairs of parallel grid lines 42 are connected.
  • a microlens 11 is arranged, wherein the apex 44 of the relevant microlens 11 is in each case arranged congruently with the respective grid point 41. Based on the area of the square grid cell 39 results in a
  • Packing density of a maximum of ⁇ / 4 « 78.5% which has the consequence that at least about 21% of the surface of the respective grid cell 39 can not contribute to the image of the respective microlens 1 1 underlying print image 27, but at a print image 27th observers viewing through the optically imaging structure 03 generates a rather unwanted disruptive perception.
  • an optically imaging structure 03 can also be composed of a group of microlenses 1 1, each rotationally symmetrical spherical or rotationally symmetric aspherical, which, in contrast to FIG. 6, are arranged without gaps and without overlapping in a grid of hexagonal grid cells 39 , d. H. Boundary points 16; 17 adjacent microlenses 1 1 are in one
  • FIGS. 8 and 9 The undesired optical effects of the limited packing density of microlenses 1 1 arranged in a group, each rotationally symmetrical spherical or rotationally symmetrical aspherical, are illustrated in FIGS. 8 and 9.
  • FIGS. 8 and 9 In each of the two-part Fig. 8 and 9 is shown in each case simplified, what perceives a viewer who looks under two different viewing angles respectively by the same group of microlenses 1 1 on the microlenses 1 1 underlaid print image 27, this print image 27 at least two different Picture elements 28a; 28b
  • at least one first picture element 28a is completely covered by the convex envelope surface 13 of the respective microlens 11 in each case on an optically neutral substrate 26 in FIGS. 8 and 9, and at least one other second picture element 28b in each case at the same position in one Corner of a z.
  • square grid cell 39 and therefore is not or only partially covered by the respective microlens 1 1 with a proportion of less than 50%.
  • the viewer looks z. B. perpendicular through the respective microlens 1 1 and takes the covered by the respective microlens 1 1 and thus imaged at least a first pixel 28a true, since the at least one first of the respective microlens 1 1 detected pixel 28a in the beam path of the observer and the Microlens 1 1 apparently filled.
  • the situation is different in the situation shown in FIG. Due to the oblique viewing angle of the viewer, z. From the viewing angle 33 ( Figure 2) focuses on the person concerned
  • Beam path is not the at least one first completely covered by the respective microlens 1 1 pixel 28a or the beam path does not even meet, so that the viewer perceives no image of the at least one first pixel 28a through the respective microlens 1 1.
  • the microlens 11 in question remains optically inactive in the situation illustrated in FIG. 9 against the background of the optically neutral substrate 26.
  • the at least one other second picture element 28b each at the same position in a corner of a z. B. square grid cell 39 and therefore only partially covered by the respective microlens 1 1, perceptible to the viewer.
  • Such arranged image elements 28b which are arranged outside of the convex envelope surface 13 of the respective microlens 1 1 at least almost completely covered surface, lead in the perception of the observer to optical disturbances such. B. to so-called ghosting or to a crosstalk effect or a loss in contrast or in sharpness with respect to the intended as a useful signal perceptible printed image 27. It can also be low-contrast and / or blurred Moire phenomena occur when the printed image has 27 periodically recurring picture elements 28, which are not arranged in phase with the arranged in a uniform grating microlenses 1 1, but wherein parts of at least some periodically recurring picture elements 28 are each disposed outside of the surface of the respective convex envelope surface 13 of the respective
  • Microlenses 1 1 is at least almost completely covered. The latter is due to the Fig. 10 by the periodically recurring star-shaped pixels 28 in their non-in-phase relationship with the lattice-shaped arrangement of the microlenses 1 first
  • microlenses 1 1 which are arranged in an existing lattice cells grid 39, at least one z. B. between adjacent microlenses 1 1 formed surface, which is not covered by the respective convex envelope surface 13 of the respective microlenses 1 1, diffuse incident light beams 14 diffuse and thus to scatter in a variety of different spatial directions.
  • the arranged in a group microlenses 1 1 form an optically imaging structure 03 in the form of a geometric figure 37 with at least one of the respective convex envelope surface 13 of the respective microlenses 1 1 uncovered area any, z. B. rectangular contour 38, wherein the respective of the respective convex envelope surface 13 of the respective
  • Microlenses 1 1 uncovered surface incident light beams 14 diffusely reflective, that is formed scattering.
  • a remission degree of this surface is in the range of z. 30% to 99%, preferably more than 60%.
  • the incident light rays 14 diffusely reflecting surface is z. B. roughened, that is, this surface has roughness structures with a roughness, with respect to the respective wavelength of the incident light beams 14 and with respect to the spectrum of incident light is of the same order of magnitude and thus has a value in the range of z. B. 380 nm to 780 nm.
  • the roughness is diffuse
  • the roughness structures are distributed over the surface i. d. R. a plurality of scattering centers for the incident light rays 14 on.
  • the roughening of the at least one incident light rays 14 diffusely reflecting surface can, for. B. in an embossing process or casting, which is used for the preparation of the plurality of microlenses 1 1 having optically imaging structure 03, thereby be manufactured or designed that at one of the microlenses 1 1 embossing or casting z.
  • microlenses 1 1 produced in their embossing technology each have their respective position, referred to at least one picture element 28 of an underlying printed image 27, in their position
  • Adjusted manufacturing process or at least adjustable, these arranged in a group of microlenses 1 1 form an optically imaging structure 03 in the form of a geometric figure 37.
  • the above-mentioned undesired disturbing perceptions can also be reduced and / or avoided, for example, by virtue of the fact that areas 49 not covered by the microlenses 11 on the surface of the geometric figure 37 are in particular colored white.
  • FIG. 13 shows by way of example in four partial representations a to d successive production steps for the formation of microlenses 11 with microlenses 11 not covered by these microlenses 11 on the surface of the geometric figure 37, in particular white areas 49.
  • first production step (a) hollows 47 of FIG for producing the microlenses 1 1 used die 46, ie mold, z. B. filled with a respective UV-curable plastic or resin. Then arranged between the troughs 47 of the die 46 webs 51 at the microlenses 1 1 uncovered areas 49 z. B.
  • the second partial view b) shows the die used for the production of the microlenses 1 1 46 each with z. B. with a plastic or resin filled wells 47 and in particular white colored webs 51 after the white ink 52 carrying print carrier 53 - as indicated by the directional arrow - has been removed from the die 46 again.
  • the third Partial view c) is the die 46 with their z. B.
  • a plastic or resin filled wells 47 and their particular white colored bars 51 are pressed in the direction of arrow on a substrate 26, wherein the white ink 52 is still on the webs 51 in a wet state.
  • Both the applied on the webs 51 of the die 46 in particular white ink 52 and the z. B. made of a plastic or resin castings for the production of microlenses 1 1 are transferred to the substrate 26.
  • the die 46 is lifted with its empty troughs 47 and after the transfer of the particular white ink 52 from the substrate 26, which is indicated by the directional arrow.
  • an optically imaging structure 03 consisting of an arrangement of a plurality of microlenses 11 is formed in the form of a geometrical figure 37, wherein regions 49 not covered by the microlenses 11 on the surface of the geometric figure are colored white in particular.
  • the uncoated by the microlenses 1 1 on the surface of the geometric figure 37, in particular white colored areas 49 additionally have z.
  • each microlens 1 1 is 100 ⁇ and preferably in the range between 20 ⁇ and 65 ⁇ , this means that the individual pixels 28 each have extremely small dimensions in the range of only a few micrometers.
  • each of these formed by printing technology picture element 28 is composed of several pixels and / or lines, the pixel size of these pixels and / or the line thickness of these lines are preferably less than half as large as the respective lens width 18 of the structure of the relevant optically Imaging structure 03 involved microlenses 1 1.
  • the same microlens 1 1 underlaid
  • Pixels 28 are their pixels and / or lines with a color register of less than 10 ⁇ , in particular in the range of about 5 ⁇ arranged.
  • the formation of pixels and / or lines in the aforementioned order of only a few micrometers and / or their Passerhaltmaschine represents in an industrial manufacturing process a high printing challenge, especially with these dimensions and / or accuracy requirements a z.
  • the arrangement of printed image 27 and optically imaging structure 03 is part of a security element 01 or a
  • Security document 02. The security element is 01 or
  • Security document 02 facing upper level at least partially at least one underlying the viewer of the security element 01 or the
  • Security element 01 or the security document 02 facing upper level is formed at least one each having a plurality of microlenses 1 1 having optically imaging structure 03.
  • This upper level is shown as a substrate 26 z. B. formed in the form of a transparent polymer film, wherein on this substrate 26 made of plastic or resin z. B. casting technology or embossing technology microlenses 1 1 are arranged.
  • the at least one lower level has a further substrate 26, which in its material z. B. is different from the upper level.
  • the substrate 26 is z. B. from a z. B. fibrous substrate, in particular of paper, with one in one of the lower levels z. B. formed on the substrate printed image 27 is at least partially covered by the upper level.
  • the upper level and the at least one lower level are preferably still joined together in the production process in the printing press, preferably after printing on one of the lower levels forming printing material.
  • the substrate 26 of the upper level is printed on the rear side, ie on the side facing the at least one lower level, prior to assembly with the respective lower level.
  • Lens width 18 of each individual microlens 1 1 and the respective dimensions of each participating in the print motif pixel 28 of the optically imaging structure 03 underlying print image 27 are each smaller than the resolution of the mere human eye of a normal adult in the range of about 150 ⁇ are from a viewer of the printed image 27 individual microlenses 1 1 and / or individual pixels 28 each individually, that are not recognized as such recognizing usually R. Rather, the viewer of the print image 27 perceives only one group of a plurality of microlenses 1 1 with the image elements 28 underlaid by these microlenses 11 as a graphic element (pixel), this perception relating to the respective pixel having regard to its shape and / or color Integration over the eye individually not resolvable pixels 28 is. Fig.
  • FIG. 14 shows schematically and greatly enlarged an arrangement of several, for. B. three superimposed lower levels of a security element 01 or a security document 02, in a first representation a) in a section and in a second representation b) in an associated plan view.
  • FIGS. 2 to 13 For possible embodiments of this optically imaging structure 03, reference is made to FIGS. 2 to 13, each with an associated description text.
  • the print image 27 is made according to its print motif of several usually R.
  • this lower printing layer 54 more i. d. R.
  • At least one upper pressure layer 56 is arranged or applied on this lower pressure layer 54, in which in each case preferably a plurality of i. d. R. different, especially different colors
  • the ink zones 61 are arranged side by side.
  • the ink zones 61 are preferably formed strip-shaped or rectangular; but they can also have any other surface geometry.
  • the image elements 28 arranged in the upper printing layer 56 are at most half as wide as the color zones 61 arranged in the lower printing layer 54 extending in the same direction.
  • the width of the picture elements 28 arranged in the upper printing layer 56 is preferably less than 30% of that Thus, at least two of these arranged in the upper printing layer 56 picture elements 28 are arranged on one of the arranged in the lower printing layer 54 color zone 61 that in a plan view of the
  • Security element 01 or security document 02 between the at least two in the upper printing layer 56 each spaced from each other
  • Picture elements 28, the color zone 61 arranged below these picture elements 28 in the lower printing layer 54 is visible in each case.
  • FIG. 14 b in the plan view of this security element 01 or security document 02, an arrangement in which picture elements 28 apparently formed by the lower print layer 54 and image elements 28 actually formed by the upper print layer 56 are arranged alternately strung together are.
  • FIG. 14 b) are through the same
  • Pairs of picture elements 28 formed by printing inks are combined, for example, into different frames 57 a to 57 e, each of these frames 57 a to 57 e, in combination with the optically imaging structure 03 arranged in the upper level consisting of microlenses 1 1, for a viewer viewing the printed image 27 a two-color Change image (flip) is created.
  • an upper level, which faces an observer of the security element 01 or the security document 02 and z. B. is formed of a transparent polymer film, the front side has the optically imaging structure 03 and the back is first printed with the particular differently colored spaced apart pixels 28, said individual pixels 28 are then overprinted with larger areas of color zones 61.
  • a multi-level arrangement is also provided, but not as in the first described embodiment a substrate 26 as a substrate z. B. of paper must have.
  • Embodiment thus leads z. B. to a security element 01 or a
  • Security document 02 lower material strength. Both embodiments have in common that the respective individual picture elements 28 can be applied or arranged in a relatively position-tolerant manner, since the ink zones 61 which are underlaid are formed over a larger area compared to these picture elements 28. This is very advantageous in terms of the manufacturing process for such a security element 01 or security document 02, especially in the case of the dimensions of the picture elements 28 lying in each case in the micrometer range.
  • Fig. 15 shows in a plan view on the left the lower printing layer 54 with a plurality, z. B. three each in lens width 18 trained z. B. parallel extending preferably different colored ink zones 61, on which lower printing layer 54 - indicated by the plus sign - the mask 58 shown on the right in Fig. 15, in particular shadow mask or stripe mask is arranged as the upper printing layer 56 or is.
  • the color zones 61 are z. B. by the printing inks R (red); G (green); B (blue) formed.
  • An individual pattern of holes 59 or slots 59 is introduced into the mask 58 in association with the respective ink zones 61, through which holes 59 or slots 59 pass through the respective ink R; G; B of the underlying color zone 61 is perceptible or is.
  • Each is preferably in different
  • Printing inks R; G; B formed color zones 61 another, each of the other color zones 61 different pattern of holes 59 or slots 59 assigned, so that all holes 59 or slots 59 differ in their respective individual positions depending on the color zone 61 from each other. All of these holes 59 or slots 59 have at least transversely to the longitudinal direction of the respective ink zone 61, d. H. in the direction of the width of the respective ink zone 61 in each case an extension, which is smaller than the respective lens width 18 of those microlenses 1 1, which cover this mask 58.
  • FIG. 15 shows how the three color zones 61, which are differently masked differently depending on the color zone 61, are shown in combination with the mask 58. From Fig.
  • the differently colored ink zones 61 are coded by the different patterns of holes 59 or slits 59 of the mask 58 in a unique way.
  • the holes 59 or slots 59 of the mask 58 are z. B. arranged distributed in a grid of preferably square grid cells, said grid in shape and / or size
  • ink zones 61 An advantage in the masking of ink zones 61 is that only these ink zones 61 are to be printed in register, even in a single direction, namely orthogonal to their longitudinal extent, moreover, the requirements for the color register are not as high as
  • the picture elements 28 of the lower printing layer 54 and the picture elements 28 of the upper printing layer 56 were to be positioned in a very precise color register relative to one another in order to generate specific alternating pictures or other perceptions.
  • FIG. 15 is only to ensure that the respective holes 59 or slots 59 of the masking in the selected assignment to the relevant in each case in lens width 18 of z. B. 20 ⁇ to 65 ⁇ trained Ink zones remain 61, which is much easier to accomplish in a printing production process than compliance with a color register in the range of less than 10 ⁇ , more of about 5 ⁇ .
  • the surface of the mask 58 facing the optically imaging structure 03 is preferably white, in particular formed by a white printing ink, in order to reduce or avoid unwanted disturbing perceptions for an observer of the printed image 27 Group arranged rotationally symmetric microlenses 1 1 could result.
  • Fig. 16 shows an optically imaging structure 03 in the form of a z. B. formed as a rectangle geometric figure 37, wherein the optically imaging structure 03 comprises a plurality of groups of rotationally symmetric microlenses 1 1, wherein these groups are arranged in a grid consisting of rows and columns. These groups of microlenses 1 1 are z. B. uniformly formed, wherein in each case a plurality of microlenses 1 1 each z. B. are grouped into a rectangle, in particular to a square.
  • Embodiment are rotationally symmetric, preferably plano-convex microlenses 1 1 each with a lens width 18 of z. B. 20 ⁇ in preferably square groups of two dimensions in each case more, z. B. six times six microlenses 1 1 arranged, these groups in turn in a
  • each group of microlenses 11 being perceptible as a graphic element (pixel) in the perception of a viewer who views the printed image 27 backed by the optically imaging structure 03
  • Each of these groups of microlenses 1 1 in both Dimensions each extending over a length which is in the range of 120 ⁇ to 150 ⁇ and thus approximately in the range of the resolution of the naked human eye normal-sighted adult.
  • optically imaging structures 03 according to FIGS. 4 or 5 may also be used in conjunction with the arrangements according to FIGS. 14 or 15.
  • a laser 63 preferably a gas laser, in particular an excimer laser 63 is used in each case to selectively remove printing ink from a selected picture element 28.
  • An emanating from the laser 63 is preferably a gas laser, in particular an excimer laser 63.
  • Laser beam 66 is directed through a mask 64 on the image element to be processed 28, said mask 64 z. B. in a direction orthogonal to the laser beam 66 has a coding in the form of a formed in this mask 64 pattern, which is determined on the basis of this pattern, at which points of the selected
  • the mask 64 is z. B. formed of a partially transparent quartz, in which the pattern is formed by appropriately positioned passages for the laser beam 66. This formed in the mask 64 pattern is transferred to the extent to be processed pixel 28, as in accordance with the pattern of the mask 64 in this pixel 28 ink when hitting the laser beam 66 z. B. is selectively removed by evaporation. The the relevant picture element 28 having substrate 26 is thus freed at certain points again from the previously applied ink.
  • the laser 63, in particular excimer laser 63 is preferably operated pulsed with a pulse duration in each case in the range of z. 1 ns to 40 ns, preferably about 20 ns.
  • the wavelength of the laser beam 66 is preferably in the ultraviolet spectral range, z. B. in the range between 100 nm and 360 nm. Structures with a width in the range of 0.25 ⁇ to 1 ⁇ can be formed with an excimer laser 63, so that in a pixel 28 finest patterns can be made from selectively removed sites.
  • Example a method for producing a printed image 27th
  • security element 01 or a security document 02 in which a plurality of picture elements 28 of the printed image 27 are formed by applying ink to a substrate 26, wherein at least one selected location of a selected laser beam 66 by means of a laser 63 emanating from a laser
  • a gas laser, in particular an excimer laser 63 is used.
  • the laser beam 66 is in the selected pixel 28 of the printed image 27, a structure having a width preferably in the range between 0.25 ⁇ and 1 ⁇
  • these structures z. B. may be similar to those in Figs. 12 or 16.
  • the laser 63 is advantageously operated pulsed with a pulse duration in the range between 1 ns and 40 ns and / or with a wavelength in the range between 100 nm and 360 nm.
  • the at least one point at which the previously applied printing ink is to be removed by means of the laser beam 66 in the selected picture element 28 of the printed image 27 is preferably selected in that in the beam path of the
  • a mask 64 is arranged with at least one passage for the laser beam 66, wherein the at least one passage in the mask 64 corresponding to the at least one ink to be liberated in each case in the selected
  • Picture element 28 of the printed image 27 is positioned.
  • Security element 01 or the security document 02 is in particular a
  • This printed image 27 has at least one image element 28 with at least one point freed from ink by the laser beam 66 emanating from the laser 63, wherein the respective lens width 18 of the microlenses 1 1 is less than 100 is ⁇ and preferably in the range between 20 ⁇ and 65 ⁇ .
  • the printing ink for forming the at least one picture element 28 of the printed image 27 is applied to an opaque or transparent substrate 26 and selectively removed therefrom by means of the laser beam 66 emanating from the laser 63.
  • the microlenses 1 1 having optically imaging structure 03 is z. B. injection molding or casting technology or embossing technology or printing technology.
  • the microlenses 11 of the optical imaging structure 03 are preferably made of a plastic or of a resin.
  • the at least one picture element 28 is formed with the at least one point to be liberated from ink in white printing ink.
  • Security documents 02 with the optically imaging, in particular micro-optical structure 03 can in principle be produced using a wide variety of types and / or designs of printing presses or printing processes.
  • an embodiment is of particular advantage, in which several or all of the sub-images are applied to the substrate 26 or printed while it by a same guide member 1 18; 1 19 out, for example, on a same guide member 1 18; 1 19, z. B. a tape or tape system or preferably one Transport cylinder 1 18; 1 19, resting, by a printing unit 101; 102 is promoted. That is, the printing of the substrate 26 on a same side with the at least two different frames, preferably different colored sub-images takes place on a transport path section with a continuous transport, ie without an intermediate transfer of the substrate 26 between different transport.
  • the printing with the at least two or more partial printing images takes place simultaneously and / or at the same printing location 103; 104, by first superimposed on each other and delivered to the substrate 26 in an indirect process in total.
  • a printing machine 100 with at least one printing unit 101 is in the production path of the substrate 26 underlying the security element 01 or document 02. 102 provided by which the substrate 26 at least on one side, for. B. on the side opposite to the micro-optical structure 03 in the finished security element 01 or document 02, at a same pressure point 103; 104 simultaneously with at least two or more imaging printing cylinder 106; 107, z. B. form cylinders 106; 107, preferably different colored printed images, d. H. o. g. Partial print images, is printable (see, for example, Fig. 18, Fig. 19 and Fig. 20).
  • the substrate 26 is thus - preferably on at least its micro-optical structure 03 in the finished security element 01 or document 02 opposite side - at a same pressure point 103; 104 on a same side simultaneously with multiple forming cylinders 106; Printed 107stammenden, superimposed and preferably different colored partial print images.
  • Such a printing unit 101; 102 will also be referred to below briefly as collective printing unit 101; 102 denotes.
  • the collective printing unit 101; 102 includes a pressure point 103; 104 for that too printing substrate 26 providing printing cylinder 108; 109, through which brought along along a transport path substrate 26 by the contact contact between printing cylinder 108; 109 and substrate 26 with printing ink of the previously applied on its lateral surface printed image can be printed.
  • the printed image is superimposed several partial images, which of several imaging
  • Printing cylinder 106; 107 in particular form cylinders 106; 107, of the printing unit 101, 102 and on this the pressure point 103; 104 delivering
  • Printing cylinder 108; 109 or already color upstream are superimposed on each other to be transferred to the print image.
  • two or more imaging printing cylinder 106; 107, z. B. form cylinder 106; 107, the z. B. on the handling of the partial pressure images collecting cylinder, in particular of the pressure point 103; 104 forming printing cylinder 108; 109, arranged one behind the other and can be adjusted or employed.
  • this one is more
  • the printing unit 101; 102 is the pressure point 103; 104 forming printing cylinder 108; 109 at the same time as the partial printing cylinder collecting collecting cylinder 108; 109, in particular color collecting cylinder 108, 109, formed and preferably as a transfer or blanket cylinder 108; 109 executed. He has at the periphery one or more successively arranged printing blankets with a compressible and / or elastic layer.
  • the with the same collecting cylinder 108; 109 collaborative imaging Printing cylinder 106; 107 are in the region of their effective lateral surface by respective inking units 1 1 1; 1 12 dyed, which in principle could be carried out in any way. Preferably, however, they are designed as lifting inking units.
  • a registration accuracy of these two partial printing images is considered in the transport direction with a maximum relative deviation of less than 20 ⁇ m, preferably less than 10 ⁇ m.
  • a printing forme designed as a high pressure form this includes, for example, effective for printing raised webs with a below 100 ⁇ , preferably below 50 ⁇ , in particular of less than 20 ⁇ lying width at the outer end.
  • a printing plate designed as a planographic printing plate for wet offset it comprises, for example, hydrophilic printing plate areas effective for printing with a width below 100 ⁇ m, preferably below 50 ⁇ m, in particular below 20 ⁇ m.
  • a printing machine 100 with at least one after a Nonimpact method, ie pressure formless, working printing unit provided, for.
  • a Nonimpact method ie pressure formless, working printing unit provided, for.
  • an inkjet printing unit through which the substrate 26 at least on a same page, z. B. the side of the micro-optical structure in the finished security element or document
  • multi-color is printed or is printable. This is preferably done in the above-mentioned manner also on a transport path section with a continuous means of transport, d. H. without an intermediate transfer of the substrate 26 between different transport means.
  • the printheads and / or their arrangement in the printing unit are z. B. for printing with a resolution of at least 600 dpi, preferably at least 1200 dpi, in particular at least 2400 dpi trained or usable.
  • Security elements 01 or documents 02 are z. For example, two or more
  • Partial prints are printed on the substrate 26 by printheads having a resolution of at least 600 dpi, preferably at least 1200 dpi, in particular at least 2400 dpi.
  • Embodiment - further at least one application device 1 16; 1 17 is provided, in which the substrate 26 is acted upon by a micro-optical structure 03 or can be acted upon.
  • the collective printing unit 101; 102 and the application device 1 16; 1 17 in principle in separate, decoupled processes or inline in a process comprising both processes in succession
  • a first group of embodiments for example, for application and printing two separate units, namely a
  • Substrate path or on both sides of the substrate path such a
  • Collective printing unit 101; 102 with two or more forming cylinders 106; 107 may be provided. In the second case, these may be carried out in a double printing unit and between their respective Farbsammelzylindern 108; 109 form a double pressure point.
  • the two units can be provided in a first embodiment, for example, in separate machines, so that a printing and applying in separate
  • Steps takes place, or in a second embodiment inline in a common machine.
  • the application device 16 provided in-line or offline can, in a first embodiment, be provided with a means for applying and connecting 16 the substrate 26 with a layer forming and / or comprising the optically imaging structure 03, e.g. B. a plastic film or film elements with the lenses 1 1 and with the micro-optical structure 03.
  • This application device 1 16 may be provided in the production path before or after printing with the partial printing images.
  • the means for connecting 1 16 as a hot stamping device 1 16 executed by which the micro-optical structure 03 comprehensive layer, for. B. plastic film on the printed or printed substrate 26 can be applied.
  • the - in particular simultaneous printing with the at least two partial print images and the application of the microoptical structure 03 takes place while being guided by a same guide element 1 18; 1 19 out, for example, on a same guide member 1 18; 1 19, z.
  • a band or belt system or preferably a transport cylinder 1 18; 1 19, resting, is promoted by the machine.
  • the printing of the substrate 26 on a same side with the at least two partial images and the application of the micro-optical structure 03 on this same or on the opposite side of the substrate 26 takes place on a transport path section with a continuous transport, ie without an intermediate Transfer of the substrate 26 between different
  • Means of transport The printing with the at least two partial printing images takes place as already mentioned above, preferably simultaneously.
  • the application can basically also by an o. Applying a micro-optical structure 03 comprehensive, z. B. film-like layer.
  • a means for forming the micro-optical structure 03 is provided on the substrate 26, through which on the substrate 26, a layer not yet cured, z. B. polymer-containing
  • Plastic material eg. As a natural or synthetic resin-containing plastic, can be applied and at least in one or more areas in the still liquid or soft state to the micro-optically active structure 03 is malleable. For example, the material is partially or fully over an applicator 121, z. As a printing or coating unit 121, in particular a screen printing 121, on the substrate 26th
  • Guide element 1 19 done before applying the plastic material, but is preferably in the circumferential direction of the guide element es1 19 behind the application of the material to be molded and optionally a preferably UV-based Intermediate drying instead.
  • the common guide member 1 19 19 not only effective as a transport cylinder 1, but equally as embossing cylinder 1 19 and the color collecting cylinder 109 of the executed as a collective printing unit 102 printing unit 102 as impression cylinder 1 19.
  • the application and shaping of the micro-optical structure 03 and printing with a plurality of partial printed images on a same guide element 1 19 may be followed by another one or two-sided printing, this preferably also by an o. Collective printing unit 101; 101 '; 102 takes place.
  • a supply device 122 for. As a stack feeder, be provided, through which the substrate 26 in the form of a substrate 04, z. B. a printing material or preferably it form of printing material 04, is supplied.
  • On the width of the printing material 04 for example, several o. G. Documents 02 printed as a so-called benefit side by side at the same time and provided with the structure 03.
  • a decrease device 123, z. B. sheet delivery the intermediate products containing the benefits are combined into containers.
  • the single-layer or multi-layered substrate 26 is guided over a same guide element 1 19 and subjected to both the micro-optical structure 03 and the at least two partial print images. This satisfies the highest demands on the register or Passerhaltmaschine between the fields on the one hand and between the fields and the position of the micro-optical structure 03 on the other.
  • the substrate 26 in at least a portion of the layer 03 covered by the structure 03 covered substrate 26 transparent by running in the substrate 26 itself transparent or this area Window is incorporated into the otherwise non-transparent substrate 26 or
  • Printing unit collective printing unit
  • Printing unit collective printing unit
  • Printing cylinder ink collecting cylinder, transfer cylinder printing cylinder, ink collecting cylinder, transfer cylinder - inking unit, lifting inking unit

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Printing Methods (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un élément de sécurité (01) ou d'un document de sécurité (02), - au moyen d'au moins un groupe d'impression (101; 102), un substrat étant imprimé sur une première face en même temps et/ou à un même point d'impression que plusieurs images d'impression partielles superposées, - et une structure de représentation optique (03) comprenant des microlentilles (11) étant appliquée en ligne sur la même face ou sur l'autre face du substrat (26) au moyen d'un dispositif d'application (116; 117). L'invention porte également sur l'élément de sécurité ou sur le document de sécurité lui-même, comportant un agencement de plusieurs microlentilles et une image d'impression placée sous ledit agencement.
PCT/EP2018/078056 2017-10-20 2018-10-15 Élément de sécurité ou document de sécurité Ceased WO2019076805A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102017218805.7 2017-10-20
DE102017218805.7A DE102017218805B3 (de) 2017-10-20 2017-10-20 Verfahren zur Herstellung eines Sicherheitselementes oder Sicherheitsdokuments
DE102018201871.5 2018-02-07
DE102018201871.5A DE102018201871B3 (de) 2018-02-07 2018-02-07 Anordnung aufweisend ein auf ein Substrat aufgebrachtes Druckbild und eine zumindest Teile des Druckbildes abdeckende optisch abbildende Struktur

Publications (1)

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WO2019076805A1 true WO2019076805A1 (fr) 2019-04-25

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CN115397676A (zh) * 2020-04-07 2022-11-25 锡克拜控股有限公司 光学元件和视觉认证对象的方法
WO2023169714A1 (fr) * 2022-03-07 2023-09-14 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité pour un document de valeur, document de valeur et procédé de production d'un élément de sécurité
EP4067106A4 (fr) * 2019-11-27 2023-11-29 Zhongchao Special Security Technology Co., Ltd Élément anti-contrefaçon optique et produit anti-contrefaçon

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* Cited by examiner, † Cited by third party
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EP4067106A4 (fr) * 2019-11-27 2023-11-29 Zhongchao Special Security Technology Co., Ltd Élément anti-contrefaçon optique et produit anti-contrefaçon
US12403716B2 (en) 2019-11-27 2025-09-02 Zhongchao Special Security Technology Co., Ltd Optical anti-counterfeiting element and anti-counterfeiting product
CN115397676A (zh) * 2020-04-07 2022-11-25 锡克拜控股有限公司 光学元件和视觉认证对象的方法
WO2023169714A1 (fr) * 2022-03-07 2023-09-14 Giesecke+Devrient Currency Technology Gmbh Élément de sécurité pour un document de valeur, document de valeur et procédé de production d'un élément de sécurité
AU2023232941B2 (en) * 2022-03-07 2025-08-28 Giesecke+Devrient Currency Technology Gmbh Security element for a value document, value document, and method for producing a security element

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