EP3397502B1 - Sicherer artikel mit einem kombinierten bild und/oder einem aufdeckungsbildschirm - Google Patents

Sicherer artikel mit einem kombinierten bild und/oder einem aufdeckungsbildschirm Download PDF

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Publication number
EP3397502B1
EP3397502B1 EP16822190.1A EP16822190A EP3397502B1 EP 3397502 B1 EP3397502 B1 EP 3397502B1 EP 16822190 A EP16822190 A EP 16822190A EP 3397502 B1 EP3397502 B1 EP 3397502B1
Authority
EP
European Patent Office
Prior art keywords
image
article
images
combined image
screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16822190.1A
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English (en)
French (fr)
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EP3397502A1 (de
Inventor
Philippe Dietemann
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.)
Oberthur Fiduciaire SAS
Original Assignee
Oberthur Fiduciaire SAS
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Filing date
Publication date
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Publication of EP3397502A1 publication Critical patent/EP3397502A1/de
Application granted granted Critical
Publication of EP3397502B1 publication Critical patent/EP3397502B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/305—Associated digital information
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • 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
    • B42D25/342—Moiré effects
    • 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
    • B42D25/355—Security threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/373—Metallic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—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
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns

Definitions

  • the present invention relates to the field of secure articles.
  • security elements applied on the surface or introduced en masse or in window (s) in a secure article, for example a label, packaging, especially for drugs, food, cosmetics, electronic parts or spare parts.
  • the secure article can in particular be chosen from a means of payment, such as a bank note, a bank card, a check or a restaurant ticket, an identity document such as an identity card, a visa, a passport or driving license, a secure card, a lottery ticket, a transport ticket or an entrance ticket to events.
  • a means of payment such as a bank note, a bank card, a check or a restaurant ticket
  • an identity document such as an identity card, a visa, a passport or driving license
  • a secure card such as a lottery ticket, a transport ticket or an entrance ticket to events.
  • WO 2011/007344 A1 (this document and EP 2 454 102 take advantage of a common priority) describes a secure article comprising a revelation frame and a combined image, the combined image being composed of a plurality of nested images, the combined image comprising periodic alternation in a first direction, of nested image elements, the elements belonging to different nested images being of different colors, the revelation frame comprising a periodic alternation in a second direction of a blackout frame element with a non-blackout frame element, the dimension according to the second direction of the non-occulting frame elements being greater than the dimension according to the first direction, of at least one element of nested images, the revealing frame allowing, when it is superimposed on the combined image, to observe different revealed images by changing the viewing angle.
  • WO 2011/007344 A1 also describes on the one hand that the elements belonging to the same nested image are of the same color and the elements belonging to different nested images are of different colors, on the other hand that the dimension in the second direction of the non-occluding frame elements is greater than the dimension in the first direction, of at least one element of nested images, but does not describe these two characteristics in combination.
  • EP 2,740,607 a system comprising a revelation screen, a layer exhibiting pigments which can be oriented by a external magnetic field and a magnetic layer having a grid of north and south poles, the revealing grid and the grid of north and south poles being of different colors.
  • WO 2014 096 794 describes a first screen on which a second surface screen is embossed, the screen lines of the first screen exhibiting the same color in visible light and different colors when viewed under a combination of visible and invisible lights and the two screens being such that the device exhibits a different color, depending on the viewing angle, when exposed to a combination of visible and invisible lights.
  • the invention aims to meet this need and has for object, according to a first of its aspects, a secure article comprising a revelation frame and a combined image, or an assembly comprising a secure article and another object, according to claim 1. .
  • the other aforementioned object is for example similar in its function and / or in its form to the secure article according to the invention.
  • the secure article and the other object are banknotes, in particular with the same fiduciary value.
  • the secure article and the other object can then only be differentiated from one another by a serial number for example.
  • the revealing screen has blackout screen elements and non-blackout screen elements.
  • the blackout elements provide a visual contrast with the non-blackout elements.
  • the border between a blackout element and a non-blackout element is thus determined by whether or not it is possible to observe the desired effect, by superposition with the combined image.
  • the non-occulting elements can be used through the non-occulting elements.
  • the combined image is located between the revealing frame and the viewer, and the shadowing elements prevent the viewer from discerning the shadowing elements of the nested image which are superimposed on it.
  • the non-occulting element is perfectly transparent or of a sufficiently low uniform opacity or else of a sufficiently light shade to make it possible to observe through it or on it the element or elements of nested images leading to the desired effect.
  • the dimension along one direction of the non-occulting element corresponds to the width along this direction of the perfectly transparent zone or of sufficiently low uniform opacity or of sufficiently light shade.
  • the transition between a blackout element and a non-blackout element is straightforward.
  • the blackout element and / or the non-blackout element form (s) a gradient.
  • the limit of the non-blackout element in one direction, useful for determining its dimension in this direction, is that from which the opacity is sufficiently strong or the shade sufficiently dark to prevent seeing the desired effect. through or on the element.
  • the dimension of the non-occulting element is given by the dimension according to this direction of the zone of the element where the opacity is less than or equal to Op occ .
  • the revealing frame comprises a finite number of frame elements. More preferably, the raster elements do not exhibit any gradient.
  • the non-blackout elements are each opacity or luminosity (L * in the (L *, a *, b *) CIE94 system) uniform, which can be zero, respectively weak, and the blackout elements are also preferably opacity or uniform brightness.
  • the combined image can comprise a periodic alternation of elements of nested images in several first directions, in particular two first directions perpendicular to each other, as detailed below.
  • the combined image can include at least two nested images, preferably at least three.
  • the combined image can include at least two elements of each nested image, preferably at least three.
  • the successive elements of the same nested image can be spaced apart by a distance defining a period.
  • the or each period may be between 10 ⁇ m and 1 mm, preferably between 50 ⁇ m and 200 ⁇ m.
  • the nested image elements belonging to different nested images are of different colors.
  • the color is defined by the combination of three parameters which are the hue, the saturation and the luminosity.
  • Hue is the perception of color measured on a color disk
  • saturation is the purity of the color
  • lightness is the degree of lightening or darkening of a color.
  • the nested image elements belonging to different nested images are of different hues.
  • the elements belonging to different nested images in particular to at least two of the different nested images, can be different in their appearances, in particular their hues, opacities, saturations, luminescences or shine, and / or present a contrast, in particular a saturation contrast , intensity, hue and / or luminance, and / or a sufficient colorimetric difference to make it possible to distinguish, in particular under white light, two adjacent nested image elements when viewed at some magnification. So at least two of the, better all nested images, look different.
  • the nested image elements of the same nested image are, according to the invention, of the same color but of a different color from those of the other nested images.
  • the revealed image can then be an image whose color is defined by the proportion of each visible nested image, that is ie the proportion of each color.
  • the proportion of a nested image is between 0 and 1, the value 0 being assigned to a nested image when the latter is not a component of the revealed image, that is to say when the latter is completely obscured by the revelation frame and the value 1 being assigned when the entire nested image is a component of the revealed image, that is to say when the latter is not all obscured by the web of revelation.
  • the revealed images are of different colors.
  • the combined image comprises three nested images of respective colors red, green and blue and the revealed image is of a color dependent on its proportion in each of the nested images, the color being easily determined by its RGB coordinates.
  • the RGB coordinates are in the form of three numbers between 0 and 255 characterizing said color, each number representing the proportion of one of the red, green and blue components making it possible to obtain said color.
  • under given observation conditions is understood to mean a given position and a given orientation of the revealing frame with respect to the combined image and a given viewing angle of the revealing frame and of the combined image.
  • the colors of the nested image elements may or may not be primary colors.
  • the combined image, and the nested images that it comprises are raster images; the combined image may be a colored frame.
  • the nested image elements can be fluorescent and have different appearances, in particular colors, under UV light. This makes it possible to have revealed images observable under UV light, different or not from the revealed images observable in visible light.
  • nested image elements When nested image elements are luminescent, they may or may not be visible in white light.
  • the nested image elements are preferably all of the same size in the or each of the directions.
  • the dimension of the elements of nested images according to the or each of the directions is, preferably, equal to the period according to this direction divided by the number of nested images. This dimension may be less than or equal to 1 mm, better still less than or equal to 100 ⁇ m, still better less than or equal to 50 ⁇ m.
  • the nested image elements are contiguous.
  • Each nested picture element can be partially superimposed with one of the adjacent elements, the superposition width being less than or equal to 10%, better still 5% of the dimension of the nested picture element in said direction.
  • At least two elements of nested images can be of different dimensions according to the or one of the directions.
  • the nested image elements preferably have the same general shape.
  • the combined image comprises a periodic alternation of lines of nested images, of longitudinal axes parallel to each other in one direction.
  • the alternation between the lines of nested images takes place in a direction, for example perpendicular to the longitudinal axes of the lines of nested images.
  • the longitudinal axes of the nested image lines define a general orientation of the combined image.
  • Each nested image can be formed of continuous or broken lines, preferably continuous, two successive lines of the same nested image being spaced from each other by a distance S defined between the longitudinal axes of the two adjacent lines, the latter defining the period of l 'combined image.
  • the lines of the same nested image may or may not all be identical.
  • the lines of a nested image are preferably all the same length. But it can be otherwise, and at least two lines of nested images can be of different lengths.
  • Each line of a nested image is preferably of constant width l over its entire length, its longitudinal edges being mutually parallel.
  • the lines of nested images are preferably all of the same width.
  • the width l of the nested image lines is preferably equal to the period divided by the number of nested images.
  • the nested image lines are contiguous.
  • the width l of the nested image lines may be less than or equal to 1 mm, better still less than or equal to 100 ⁇ m, even better still less than or equal to 50 ⁇ m.
  • Each line of nested images can be partially superimposed with one of the adjacent lines, the width of the superposition being less than or equal to 10%, better still 5% of the width of said line of nested images.
  • At least two lines of nested images are of different widths.
  • the lines of nested images preferably have the same general shape, in other words, the edges of the lines of nested images are parallel to each other.
  • the lines of nested images may or may not be rectilinear, for example curved, wavy or crenellated.
  • the combined image may have a resolution greater than or equal to 800dpi. In other words, for its realization, it requires printing or manufacturing means other capable of producing details corresponding to such a resolution.
  • the combined image can be as such, that is to say by being observed directly without passing through the revelation screen, of homogeneous appearance to the naked eye at a normal observation distance taking into account its finesse.
  • the combined image may appear to the naked eye at a normal viewing distance to have a uniform appearance, especially color. This allows, if desired, to have revealed images which present a homogeneous appearance to the naked eye at a normal viewing distance.
  • normal viewing distance is meant the usual viewing distance of a secure article, for example 30 cm and preferably 15 cm.
  • the combined image and the revealing screen are according to the invention arranged such that the revealed images each appear of a solid color.
  • the combined image can have any suitable contour, and in particular its contour can define a pattern which is also found on the article; the combined image is for example an outline defining a pattern such as a character, animal, plant, monument or alphanumeric sign, which also appears on the article, for example in the form of a print or a watermark.
  • the revelation frame may comprise a periodic alternation of a blackout frame element with a non-blackout frame element in several second directions otherwise called orientations, in particular two directions perpendicular to each other.
  • the blackout raster element and the non-blackout raster element are preferably of different opacities, transparencies and / or hues, in particular one raster element is opaque and the other element is at least partially transparent .
  • the revelation frame is formed of a periodic alternation of occulting elements, for example substantially opaque black and non-occulting elements, for example transparent, otherwise called interlines. Therefore, when the revealing screen and the combined image are superimposed, the blackout elements prevent the observation of part of the combined image and the non-blackout elements allow the remainder of the combined image to appear.
  • the blackout raster element is a filter which is such that when superimposed on the combined image, the combined image portions on which it is superimposed are not visible.
  • the revealing screen is a color filter which does not allow any of the colors of the combined image to pass.
  • the frame elements have the same shape as the nested image elements. That is, if the nested picture elements are in the form of lines, the raster elements are in the form of lines as well.
  • the frame and the combined image when the revealing frame and the combined image are superimposed, the frame and the combined image have the same or the same orientations, that is to say that the first direction (s) are aligned with the second (s). respective directions. Therefore, when the revealing frame and the combined image are superimposed, the frame elements are superimposed on the nested image elements of the combined image; the obscuring raster elements hide part of the nested image elements of the combined image, and the non-hidden nested image elements form the revealed images.
  • a revelation frame having small-dimension occulting raster elements allows the observation of a revealed image comprising a greater proportion of nested images, in particular of colors, than a revealed image observed with a revealing screen having larger-dimension occulting screen elements.
  • the period of the revelation frame according to the or one of the second directions is substantially equal to the period of the combined image according to the or one of the first directions.
  • the revelation frame or each block can include at least 5 blackout frame elements according to the or each of its directions.
  • the revelation frame comprises a periodic alternation of an occulting frame line with a non-occulting frame line of longitudinal axes parallel to one another.
  • the two frame lines have parallel longitudinal axes and define a general orientation of the revealing frame.
  • each weft line is of constant width over its entire length, its opposite longitudinal edges being mutually parallel.
  • the blackout raster lines and the non-blackout raster lines which alternate between them may or may not be of the same width.
  • the two frame lines have the same general shape, in particular the same general shape as the nested image lines.
  • the two screen lines are preferably rectilinear, but in a variant the revealing screen comprises screen lines which are not rectilinear, for example being curved, wavy or in crenellations.
  • edges of one of the frame lines are parallel to the edges of the other of the frame lines.
  • the resolution of the revealing screen is preferably greater than or equal to 800 dpi.
  • the revelation screen may as such have a homogeneous appearance to the naked eye at a normal viewing distance, taking into account its fineness.
  • the frame of visualization may appear observed with the naked eye at a normal viewing distance and in white light as having a uniform appearance, especially color.
  • the revealing screen can have an outline of any shape, for example circular, oval, in disc section, star, polygonal, for example rectangular, square, triangular, hexagonal, pentagonal or diamond, or form a more complex pattern, in particular a motif representing a text, an alphanumeric sign, an ideogram, an object, a person, a plant, a monument and / or an animal.
  • any shape for example circular, oval, in disc section, star, polygonal, for example rectangular, square, triangular, hexagonal, pentagonal or diamond, or form a more complex pattern, in particular a motif representing a text, an alphanumeric sign, an ideogram, an object, a person, a plant, a monument and / or an animal.
  • the disclosure frame may include an inclusion of another security means, in particular of another disclosure frame.
  • the revealed images are observable in reflected light and / or in transmitted light, and preferably they are observable in both reflected light and in transmitted light.
  • the images revealed have a homogeneous appearance to the naked eye at a normal viewing distance, according to the invention a homogeneous color.
  • the revealed image obtained is homogeneous and has a color resulting from the combination of the colors of the nested images composing it according to their visible proportions and the appearance of the elements. blackout weft.
  • the revealed images are preferably observable from both the reveal screen side and the combined image side.
  • the images revealed have different appearances, in particular different colors (according to the invention) and / or different brightnesses.
  • At least one revealed image can consist of at least two adjacent nested images.
  • At least one revealed image can include a single nested image.
  • the revealed image forms a macromotif when the revealing frame is superimposed on the combined image, under given observation conditions.
  • this macromotif is visible when the orientation of the revelation frame is the same as that of the combined image.
  • the images revealed form macromotifs having different appearances, in particular different colors and / or shine, for example different RGB coordinates and / or different patterns, for example different stages of a movement.
  • the macromotif may change appearance during a displacement according to the or one of the directions of the combined image, and / or a change in the angle of observation.
  • the pattern may change color.
  • the macromotif may disappear during a change in the orientation of the revealing screen relative to that of the combined image, in particular when the orientation of the revealing screen becomes different from that of the combined image.
  • the macromotective formed can be of any shape, in particular represent a text, an alphanumeric sign, an ideogram, a geometric shape, an object, a person and / or an animal.
  • the secure article or assembly may include a second disclosure frame separate from the first disclosure frame and intended to be superimposed on the same combined image.
  • the combined image can be formed from a periodic alternation of pixels of nested images in two first non-parallel directions, in particular separated by an angle of 60 ° or 90 °, preferably perpendicular.
  • pixels is understood to mean an elementary pattern.
  • a pixel can be polygonal in shape, including triangle, hexagon, rectangle or square.
  • the revelation frame can be formed by periodically alternating a blocking frame pixel with a non-occulting frame pixel in two second directions.
  • the first directions are aligned with the second directions.
  • the occulting raster pixels prevent the observation of a part of the pixels of nested images allowing only a certain proportion of each nested image to appear for each revealed image.
  • the associated revealing frame or each associated frame block can be simplified (e ) by defining a periodic alternation of blackout raster elements and non-blackout raster elements in the form of lines.
  • the combined image and / or the revelation screen can be carried on the secure article or the other object by a printing process, in particular offset, intaglio, laser, gravure, letterpress or screen printing, the combined image and / or the revelation screen being printed with colored inks or not, visible to the naked eye, under ultraviolet (UV) and / or infrared (IR) light, opaque, fluorescent, translucent and / or transparent.
  • the combined image must be printed with colored inks.
  • the combined image can be printed in particular by a combination of colors having sufficient respective colorimetric differences, for example printing in CMYK (Cyan, Magenta, Yellow, Black) and preferably in RGB (Red, Green, Blue).
  • CMYK Cyan, Magenta, Yellow, Black
  • RGB Red, Green, Blue
  • metallizations and / or demetallizations are used in order to avoid counterfeiting by printing.
  • the combined image and / or the revealing screen can include metallizations and / or demetallizations, for example in different metals, in particular in copper or in aluminum and their alloys.
  • the combined image and / or the reveal screen may still be printed with liquid crystals and be worn on an area of the secure article polarizing light, such that the combined image and / or the reveal screen does not. are visible only when folding the article on itself or through an external polarizer.
  • At least one of the combined image and the revealing screen may appear on an area of the secure article which is at least partially transparent, the superposition of the revealing screen and the combined image being effected by folding the secure article or by superimposing the secure article with the other object.
  • the revealing frame can allow, when superimposed at least partially on the combined image of the secure article or of the other object, to observe different revealed images by a relative displacement of the revealing frame with respect to the combined image according to the or one of the directions of the combined image and of the revealing frame, and / or by a change of observation angle of the combined image and of the revealing frame.
  • the revealing raster may allow, when superimposed on the combined image so that they have the same orientation, the observation of a certain color and said color may change during a change in the viewing angle and / or when the revelation screen is moved in the direction or one of the directions of the combined image and the revelation screen, in particular perpendicular to the longitudinal axes of the image lines. frame of the block and lines of nested images.
  • Folding of the secure article may take place along a center line of the article, preferably parallel to one side of the article, for example along a center line passing through the middle of the length of the article.
  • the revealing screen and the combined image can be superimposed by being separated from each other by an interval of constant thickness.
  • This gap can be formed by a transparent or translucent substrate having on the side of a first face of the substrate the combined image and on the side of a second face of the substrate, opposite the first, the revealing screen superimposed on the image. combined.
  • the revelation frame can then make it possible to observe different revealed images, by a parallax effect, during a change in the direction of observation of the secure article.
  • the interval between the revealing frame and the combined image is preferably greater than or equal to the period of the revealing frame, in particular between 10 ⁇ m and 1 mm, being for example less than 25 ⁇ m.
  • the revelation frame can make it possible to observe different revealed images during a change in the direction of observation of the secure article.
  • the substrate may comprise or be constituted by a thermoplastic material, for example a polyolefin, for example polyethylene (PE), polyvinyl chloride (PVC), polyester, polyethylene terephthalate (PET), polycarbonate (PC), polyester carbonate (PEC), polyethylene terephthalate glycol (PETG), acrylonitrile butadiene styrene (ABS) or a light-collecting film, for example of the “waveguide” type, for example a luminescent film based on polycarbonate sold by the company BAYER under the name LYSA®.
  • a polyolefin for example polyethylene (PE), polyvinyl chloride (PVC), polyester, polyethylene terephthalate (PET), polycarbonate (PC), polyester carbonate (PEC), polyethylene terephthalate glycol (PETG), acrylonitrile butadiene styrene (ABS) or a light-collecting film, for example of the “waveguide” type, for example
  • the substrate can comprise cellulosic fibers and in particular paper.
  • the substrate can be a sufficiently translucent paper to allow the nested images to be revealed, in particular a tracing paper.
  • the substrate can also be transparentized locally or not, by watermarking as described in the patent.
  • EP 1252389 or by application of a generally fatty composition which makes it transparent permanently for example a composition made of oil and transparent mineral material, as described in the patent US 2,021,141 , or for example a composition in the form of a wax combined with a solvent.
  • the substrate can also be transparentized by locally applying a wax by hot transfer, as described in the patent. US 5,118,526 .
  • the substrate a fibrous layer comprising a hot-melt material, for example polyethylene, as described in the patent.
  • a fibrous layer comprising a hot-melt material, for example polyethylene, as described in the patent.
  • EP 0 203 499 which under the local action of heat will see its transparency vary.
  • the secure article may be at least partially made of paper or plastic, in particular comprising a laminated or extruded plastic sheet.
  • the secure article may include at least one paper jet, in particular based on natural and / or synthetic fibers, for example cotton or linen fibers in the case of a bank note.
  • the secure article can be at least partially transparent, opaque or translucent, in particular opaque in reflected light and translucent in transmitted light.
  • the combined image and / or the revelation screen can be carried by a film, a lamination strip, a patch and / or a foil appearing on the secure article.
  • the film, the lamination strip, the patch and / or the foil may include metallizations and / or demetallizations, for example made of aluminum or copper, or all types of prints.
  • the term “patch” is understood to mean an element of smaller dimensions than that of the secure article and which may not extend to the edge of the article.
  • the patch may have a polygonal, circular or oval outline or forming a more complex pattern, in particular a pattern representing a text, an alphanumeric sign, an ideogram, an object, a person, a plant, a monument and / or an animal.
  • foil or “lamination strip” is understood to mean an element applied in particular hot, for example by transfer to the secure article, in particular from a supporting structure.
  • the film, the lamination strip, the patch and / or the foil can include holographic prints and / or liquid crystals.
  • the combined image and / or the revelation screen can also be carried by a security thread, incorporated on the surface, in bulk or preferably in window (s) in the secure article.
  • the combined image and / or the revelation screen can be incorporated as a window in the secure article.
  • the window may be formed on the secure article during its manufacture.
  • the window can be formed by a lack of material, for example the local absence of paper, above or below the combined image and / or the revealing screen, the window being preferably at least partially transparent or translucent on the side of the combined image and / or the revelation screen opposite to the lack of material.
  • the window may still not have any lack of material.
  • the window can for example be at least partially transparent or translucent above or below the combined image and / or the revealing screen, the transparent or translucent zones being superimposed on one another so as to be able to observe the two opposite sides of the secure article.
  • the window can still be through.
  • the window may have gaps in material superimposed on either side of the secure article.
  • the two sides of the secure article can thus be directly observable and not through transparent or translucent zones.
  • the revealing screen and / or the combined image can be incorporated completely in the window or partially.
  • the article may also have a plurality of windows as described above.
  • the windows may or may not all be of the same type.
  • Examples of the production of windows in secure articles are, for example, given in GB 1,552,853 which discloses the creation of a window in particular by transparentization, laser cutting, abrasion or mechanical incision, EP 0 229 645 which describes the creation using masks of a window on one side or on both sides of a bijet paper, WO 2004/096482 which describes the creation of a window by laser cutting, CA 2 471 379 which describes the creation of a transparent window and association with a security element and WO 2008/006983 which describes the creation of a transparent window on a bijet paper.
  • the secure article may also include a security thread presenting the combined image and / or the disclosure frame, in particular a succession of combined images and / or disclosure frames.
  • the secure article may also include two security threads, one carrying at least one combined image and the other carrying at least one corresponding revelation frame.
  • the security thread (s) may be of sufficient width to enable the combined image and / or the revealing screen to appear therein in its entirety.
  • the width of the security thread (s) is preferably between 3 and 20 mm, more preferably between 4 and 10 mm and for example equal to 6 mm.
  • the revealing screen and / or the combined image advantageously appear on an area of the article which is at least partially transparent, in particular the revealing screen and / or the combined image can be at least partially transparent.
  • the at least partially transparent zone may correspond to a recess, passing through or not, of the article in which the revealing screen and / or the combined image are placed.
  • the zone is for example constituted by a translucent tracing paper.
  • the zone may also consist of a polymer layer comprising, for example, polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polycarbonate (PC), polyester carbonate (PEC), polyethylene terephthalate. glycol (PETG), acrylonitrile butadiene styrene (ABS) or a light collecting film, for example of the “waveguide” type, for example a polycarbonate-based luminescent film sold by the company BAYER under the name LYSA® .
  • PE polyethylene
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PEC polyester carbonate
  • a light collecting film for example of the “waveguide” type, for example a polycarbonate-based luminescent film sold by the company BAYER under the name LYSA® .
  • the secure article as well as the elements that it comprises such as for example a security thread, a patch and / or a foil, may include one or more additional security elements as defined below.
  • security elements some are detectable by eye, in daylight or in artificial light, without using a particular device.
  • These security elements include, for example, colored fibers or planchettes, totally or partially printed or metallized threads. These security elements are said to be first level.
  • security elements are detectable only with a relatively simple device, such as a lamp emitting in the ultraviolet (UV) or infrared (IR).
  • UV ultraviolet
  • IR infrared
  • These security elements include, for example, fibers, boards, bands, threads or particles. These security features may be visible to the eye naked or not, being for example luminescent under lighting from a Wood lamp emitting at a wavelength of 365 nm. These security elements are said to be second level.
  • security elements require a more sophisticated detection device for their detection.
  • These security elements are for example capable of generating a specific signal when they are subjected, simultaneously or not, to one or more external excitation sources. The automatic detection of the signal makes it possible to authenticate, if necessary, the article.
  • These security elements include, for example, tracers in the form of active materials, particles or fibers, capable of generating a specific signal when these tracers are subjected to optronic, electrical, magnetic or electromagnetic excitation. These security elements are said to be third level.
  • the additional security elements present within the secure article may have first, second or third level security characteristics.
  • the secure item can be a means of payment, such as a bank note, check, bank card or restaurant ticket, an identity document such as an identity card or visa or passport or a driving license, a lottery ticket, a secure card, a transport ticket or an entrance ticket to cultural or sporting events.
  • a means of payment such as a bank note, check, bank card or restaurant ticket, an identity document such as an identity card or visa or passport or a driving license, a lottery ticket, a secure card, a transport ticket or an entrance ticket to cultural or sporting events.
  • the other object is an electronic imager making it possible to form a first image, the first image being the revealing frame or the combined image, in order to be able to superimpose it on a second image present on the secure article, the second image being the other of the revelation frame and the combined image.
  • electronic imager is understood to mean an electronic device making it possible to produce an image by display or projection.
  • the electronic imager may include a screen on which the first image is displayed.
  • the electronic imager can include a screen of any known type, for example a computer, television, mobile phone, book or diary screen. electronic, a personal digital assistant ("Personal Digital Assistant"), a digital tablet, a watch face, this list being non-exhaustive.
  • the electronic imager can be a projector, without or without a screen onto which the projection is carried out.
  • the projector can make it possible to project the first image on a background or on the security article.
  • the electronic imager can be a projector of any known type, for example a slide projector, a video projector, an overhead projector, a picoprojector or nanoprojector, for example a miniaturized video projector integrated into a portable device (PDA, cell phone, laptop computer, etc. for example), a cinematographic projector, this list being non-limiting.
  • a projector of any known type for example a slide projector, a video projector, an overhead projector, a picoprojector or nanoprojector, for example a miniaturized video projector integrated into a portable device (PDA, cell phone, laptop computer, etc. for example), a cinematographic projector, this list being non-limiting.
  • the electronic imager preferably makes it possible to generate a pixelated image, each pixel of which is individually addressable, preferably with at least 256 levels of gray or colors, and / or with a resolution of between 50 and 1000 dpi ("Dot Per Inch” or “Points Per Inch”).
  • the electronic imager can be a projector projecting visible, infrared (IR) and / or ultra-violet (UV) light.
  • IR visible, infrared
  • UV ultra-violet
  • the electronic imager may include a screen of the LCD (“Liquid Crystal Display”), LED “Light Emitting Diode”), OLED (“Organic Light Emitting Diode”), laser, plasma, electrochromic, FED (“Field Emission Display”) type. ), SED (“Surface-conduction Electron-emitter Display”), LCOS (“Liquid Crystal On Silicon”) or even a cathode ray tube.
  • LCD Liquid Crystal Display
  • LED Light Emitting Diode
  • OLED Organic Light Emitting Diode
  • laser plasma
  • electrochromic FED (“Field Emission Display”) type.
  • FED Field Emission Display”
  • SED Surface-conduction Electron-emitter Display
  • LCOS Liquid Crystal On Silicon
  • the electronic imager preferably includes a liquid crystal display (LCD).
  • LCD liquid crystal display
  • the screen may have a resolution of between 50 and 600 dpi, better still between 100 and 300 dpi, for example equal to 160 dpi.
  • the second image may appear on an area of reduced opacity of the secure article.
  • a zone of reduced opacity may in particular correspond to a zone of lesser thickness, to a zone made transparent or to a zone comprising at least one layer of a material of lower opacity.
  • the opacity of said zone of reduced opacity will in particular be sufficiently low to allow observation in transmission of the first image.
  • the second image is visible in transmission and in reflection.
  • the second image can appear on an at least partially transparent or translucent zone of the secure article.
  • the second image preferably appears on an area at least partially transparent or translucent, in particular an at least partially transparent window.
  • the first image produced by the electronic imager can be displayed on the electronic imager, for example on a screen of the electronic imager.
  • the first image is projected by the electronic imager, for example on a background or on the secure article.
  • the second image of the secure article can be superimposed on the first image projected on the background.
  • the first image is projected at least partially on the second image of the secure article.
  • the article and the imager may or may not come into contact when the images are superimposed.
  • the first image and / or the second image may exhibit polarization properties.
  • the first image is produced by the electronic imager by means of polarized light, in particular rectilinearly, circularly or elliptically polarized light.
  • the electronic imager may include a screen emitting polarized light or projecting polarized light.
  • the secure article may include a polarizing filter.
  • the second image can be produced using a polarizing filter.
  • the steps stated above will be carried out so as to form an image which is the positive or negative image of the second image.
  • at least one polarizing filter for example by printing, a polyether-based aliphatic polyurethane, for example such as that sold by the company LAMBERTI under the name Esacote® PU 21 / S.
  • the composition comprising cholesteric liquid crystals when during the implementation of the method according to the invention, the composition comprising cholesteric liquid crystals is situated between the polarizing substrate and the electronic imager, the cholesteric liquid crystals modify the polarized light. of the electronic imager which is not stopped by the substrate and the areas covered with cholesteric liquid crystals appear transparent when the polarizing substrate is oriented so as to be opaque.
  • the cholesteric liquid crystals exhibit an optically variable effect when the polarizing substrate is oriented so as to be opaque.
  • the optically variable effect of crystals Cholesteric liquids is more generally known under the name of “colorshift” effect, the color of the cholesteric liquid crystals depending on the angle of observation and the latter being observed in particular against a dark background, preferably black in color.
  • the “colorshift” effect of cholesteric liquid crystals can constitute an additional security for authenticating and / or identifying the secure article.
  • the second image is defined by a first polarizing material superimposed on a second polarizing material, the first material extending in particular in patterns corresponding to the second image. and the second material extending continuously.
  • the first material is preferably a cholesteric liquid crystal print and the second material is preferably a linearly polarizing substrate.
  • patterns corresponding to the second image is meant that said patterns form the second image in negative or positive.
  • the first and second images exhibit polarization properties
  • there is only one orientation of one with respect to the other allowing one to partially mask the other.
  • there is only one orientation of the first image relative to the second image making it possible not to be able to observe the first image through the polarizing zones of the second image, or vice versa.
  • the first and second images exhibiting polarization properties consist of polarizing zones and non-polarizing zones. When placed in front of a light source emitting polarized light, there is only one orientation in which the polarizing areas become opaque.
  • the article comprises a polarizing filter
  • the polarizing filter may appear opaque, in particular black in color, only in this orientation, which is preferably single, of the first image relative to the second image.
  • the presence of a single orientation of the first and second images relative to each other as described above can make it possible to authenticate and / or identify the secure article according to a first level of security.
  • the electronic imager for example the screen of the electronic imager, and / or the secure article may include an indicator making it possible to inform the user on how to position the first and second images with respect to one another. 'other to obtain said orientation, for example a visual cue.
  • the second image is printed with a compound, in particular liquid crystals, visible only when placed in front of an electronic imager emitting polarized light, in particular a liquid crystal screen.
  • the second image is transparent under unpolarized illumination, for example under natural lighting, and is visible only under polarized illumination using the electronic imager, which provides additional security for the secure article.
  • the secure article may include an integrated microcircuit, for example an RFID chip or an optical chip (activated for example by the light coming from the electronic imager), capable of communicating with the electronic imager so that the latter produces, in particular displays and / or projects information providing information on how to position the first and second images with respect to one another to obtain said orientation.
  • an integrated microcircuit for example an RFID chip or an optical chip (activated for example by the light coming from the electronic imager), capable of communicating with the electronic imager so that the latter produces, in particular displays and / or projects information providing information on how to position the first and second images with respect to one another to obtain said orientation.
  • the secure article may include an integrated microcircuit, for example an RFID chip or an optical chip, capable of communicating with the electronic imager so that the latter produces at least one first image, the association of which with the second image makes it possible to put implementing the method according to the invention.
  • the electronic imager can produce at least a first image associated with a second image of the secure article by communication between the electronic imager and the integrated microcircuit.
  • the electronic imager can also produce at least a first image from a photo and / or a video of the secure article, in particular from the second image of the secure article or from an identifier present on the. item, for example a logo or serial number.
  • the photo and / or video can be produced with the electronic imager, an image capture device, for example a digital camera, connected to the electronic imager by a wired link or not and / or be transferred to the imager.
  • electronic for example from a data storage device or via a network, such as the Internet.
  • the first image can be produced only from the photo and / or video of the secure article, or alternatively, be produced from the photo and / or video of the secure article and additional information, for example example information present on the secure article, on the photo and / or video, entered by the user, or even received from a network, for example from a secure server.
  • the electronic imager may include a program making it possible to identify the secure article, and in particular the second image, and to produce, in particular to display and / or project, a first image obtained from a database providing information. on the first image to be used according to the secure article, in particular the second image.
  • the electronic imager can produce several first images and / or the secure article can include several second images, at least one of the first images making it possible to observe the authentication and / or identification information when superimposed on the least one of the second images according to the method of the invention, or vice versa.
  • a given electronic imager can make it possible to authenticate and / or identify secure articles of different types, notably comprising different second images.
  • the second images are differentiated by their size, their color, their shape, or even by the spacing between the frame elements or nested images or the width of the latter.
  • the first images can also be differentiated by their size, their color, their shape, or even by the spacing between the elements of the frame or nested images or the width of the latter, or even by the size of the pixels, the spacing between pixels or pixel color.
  • Electronic imagers can, for example, be differentiated by their brand, their model, their resolution, their type, namely computer, television or telephone screen, or projector, for example.
  • first images and / or second images can make it possible to authenticate and / or identify the security article independently of the differences mentioned above.
  • the first image produced by the electronic imager can come from a communication network with which the electronic imager communicates, for example a telephone network, the Internet or an internal network, the image being for example downloaded, and / or be supplied with the electronic imager, for example on a data medium, for example a hard disk, a USB stick, a CD and / or a DVD.
  • the security article may, where appropriate, include such a data medium.
  • the data medium can be an integrated microcircuit, for example an RFID or optical chip, communicating with the electronic imager.
  • the secure article can include a luminescent zone, for example fluorescent and / or phosphorescent, and the electronic imager can project the first image on the secure article under ultraviolet (UV) lighting.
  • a luminescent zone for example fluorescent and / or phosphorescent
  • UV ultraviolet
  • the second image may be a luminescent printing, for example produced on a black opaque background of the secure article, onto which the first image is projected under UV lighting. The second image is then visible only under UV lighting.
  • the second image can still be printed on a luminescent background of the secure article, so that it is visible under both UV light and normal light.
  • the subject of the invention is also a method for authenticating, according to claim 14, a secure article according to the first aspect of the invention, in which the image (s) revealed by the revelation frame is observed, the image is changed. 'viewing angle and / or position of the revealing frame relative to the combined image to observe a change in the revealed image and one concludes as to the authenticity of the article at least on the basis of this observation.
  • the method may include the step of aligning the first direction (s) with the respective second direction (s) when the revealing frame and the combined image are superimposed.
  • the revealing screen can be at least partially superimposed on the combined image to observe the images by folding the secure article and / or by superimposing the secure article and the other object, the angle of observation and / or the position of the revelation frame with respect to the combined image is then changed to observe a change in the revealed image and one concludes as to the authenticity of the article at least on the basis of this observation.
  • the photo and / or video can be produced with the electronic imager, an image capture device, for example a digital camera, connected to the object and / or be transferred to the electronic imager, for example from a device data storage or via a network, such as the Internet.
  • an image capture device for example a digital camera
  • Each nested image I i is formed of lines of nested images i i arranged periodically in the direction X I and of the same width l i constant over their entire length.
  • the nested images are of the same period S.
  • the lines of nested images i i are parallel longitudinal axes defining a general orientation O i of the image combined by their general direction.
  • the periodicity is observed along an axis X I perpendicular to the longitudinal axis of the nested image lines.
  • the lines of a nested image are continuous and of the same length, but it may be otherwise.
  • the combined image I corresponds to the superposition of these nested images I 1 to I n by shifting them relative to each other along the axis X I so that the lines of nested images i 1 to i n do not overlap not between different images.
  • the lines of a nested image i 1 to i 3 have the same width l 1 to l 3 equal to S / 3.
  • the lines i 1 to i n of the nested images can be of widths l 1 to l n different from each other, as shown in the figure. figure 7A .
  • the combined image I is formed of three nested images I 1 to I 3 .
  • the first nested image I 1 is formed by a red line i 1 periodic
  • the second nested image I 2 is formed by a green line i 2 periodic
  • the third nested image I 3 is formed by a blue line i 3 periodic.
  • the three lines of the nested images i 1 to i 3 are of the same width l .
  • the lines of the nested images i 1 to i 3 are rectilinear.
  • the resulting combined image I is a raster image exhibiting a periodic alternation of lines i 1 to i 3 of different colors.
  • the period S is between 10 ⁇ m and 1 mm, preferably between 50 and 200 ⁇ m.
  • the width l of the lines of the nested images i 1 to i n is less than or equal to 50 ⁇ m, being for example substantially equal to 33 ⁇ m. This value corresponds to a resolution of the combined image I of approximately 800 dpi, which represents a limit for conventional printers which generally have a maximum resolution of 600 dpi, and which constitutes a safety factor.
  • the print definition can be sufficiently precise for the mixture of colors to appear homogeneous.
  • the lines of the nested images i 1 to i n have micropatterns 7, and better still are formed by micropatterns 7.
  • the micromotives 7 of the lines i i of a nested image can be colored with a single color so that the lines i i appear colored, or not.
  • the micropatterns 7 are of the width l of the lines i i of the nested image and of a height of the same order of magnitude so that, in view of the resolution, the lines i i appear of a uniform color. to the eye, the micropatterns 7 not being distinguishable with the naked eye at a distance of 15 cm. The user must for example use a magnifying glass to view the micropatterns 7, which reinforces the security of the article.
  • the micropatterns 7 can be in positive writing or in negative writing.
  • the combined image I is formed of three nested images I 1 , I 2 and I 3 as described previously, except that the nested image lines i 1 , i 2 and i 3 are not lines of homogeneous color but lines of micropatterns 7 colored in positive writing.
  • the lines i 1 are made up of a repetition of the number "100" in red color
  • the lines i 2 are made up of a repetition of the word "AWS" in green color
  • the lines i 3 are made up of a repetition of the word Blue “BUTTERFLY”.
  • the combined image I can be formed by printing, in particular by four-color printing.
  • the combined image I is formed by metallization and / or demetallization, in particular by metallization using metals of different colors for each of the nested images I 1 to I n .
  • the combined image I comprises two nested images I 1 and I 2 , one being in copper and the other in aluminum.
  • the nested images I 1 to I n can be glossy or matte.
  • nested images are at least partially differentiated by their brightness, with nested images being matte and other nested images being glossy.
  • the combined image I can also be formed by an electronic imager 100.
  • the revelation frame 4 is composed of a periodic alternation of period Q constant of straight and occulting frame lines 5a, in particular of opaque and black lines, and of non-occulting lines 5b, in particular of transparent lines of parallel longitudinal axes .
  • the periodicity is observed along an axis X T perpendicular to the longitudinal axis of the frame lines 5a and 5b.
  • the longitudinal axes of the frame lines 5a and 5b define a general orientation of the frame O t by their general direction.
  • the blackout raster lines 5a are of a constant width m less than the period Q of the raster and the transparent raster lines 5b are of a constant width k, less than the period Q.
  • the width k of the lines of transparent frames 5b is greater than the width l of a nested image line.
  • the widths of the blackout screen lines 5a and the transparent screen lines 5b may or may not be identical.
  • the lines of frames 5a and 5b have rectilinear and parallel edges, but it may be otherwise.
  • the revelation frame 4 may include other patterns such as crenellations or undulations, as illustrated respectively in figures 8A and 8B .
  • the resolution of the revealing screen 4 is preferably greater than or equal to 800 dpi.
  • the revelation screen 4 may as such have a homogeneous appearance to the naked eye at a normal viewing distance, taking into account its fineness.
  • the revealing screen can appear to the naked eye at a distance of 15 cm as having a gray, uniform color, more or less dark depending on the width m of the blackout screen line 5a.
  • a combined image and a sufficiently fine revelation screen provide anti-photocopying security
  • the combined image I and / or the revealing screen 4 can be formed by printing, metallization, demetallization, laser marking, lithography or any other technique making it possible to fix or reveal an image.
  • liquid crystal inks can be used, for example to print the combined image I.
  • the animation in order to be revealed, may then require in addition to the revealing screen, the use of a filter.
  • polarizer which may or may not be present on the article.
  • the revelation screen 4 can be formed by printing or metallization and / or demetallization.
  • the blackout raster lines 5a of the revealing raster 4 can be glossy or matt.
  • the revelation screen 4 is different, in particular the lines of the screens are not opaque and transparent.
  • the blackout raster lines can be formed of a filter that does not pass the wavelengths corresponding to the combined image and the non-blackout raster lines can at least partially pass these wavelengths.
  • the period Q of the revelation frame 4 is equal to the period S of the combined image I.
  • the disclosure frame 4 and the combined image I are superimposed and the general orientation O t of the disclosure frame 4 is substantially the same as the general orientation O i of the combined image I, a revealed image I r can be observed.
  • the revealed image I r then corresponds to the parts of the combined image I present under the lines of transparent frames 5b for a given viewing angle.
  • the blackout frame lines 5a come to mask part of the lines. of nested images i 1 to i n , the other part of the lines of nested images i 1 to i n being visible through the transparent raster lines 5b.
  • the lines of transparent frames 5b all allow the visualization of the same proportion (P 1 ; ...; P n ) of the nested image lines i 1 to i n .
  • the proportion P i corresponds to the proportion of a line i i of the visible nested image I i.
  • the obscuring raster lines 5a make the nested image lines i 1 to i n on which they are superimposed dark and thereby prevent their visualization.
  • the lines of nested images i 1 to i n superimposed on the lines of transparent frames 4b are visible to form the revealed image I r .
  • the revealed images I r are observable in reflected light and in transmitted light.
  • the lines of nested images i 1 to i n are all of the same width l 1 to l n and the shadowing raster lines 5a have a width m equal to 0.75 times the width of the lines of nested images i 1 to i n .
  • the occulting raster lines 5a when they are well positioned relative to the nested image lines i 1 to i n , cover three quarters of one of the nested images, ie three quarters of a color; two nested images and a quarter of the third nested image are therefore visible.
  • the proportion (P 1 ; P 2 ; P 3 ) of the nested image lines i 1 , i 2 and i 3 of the revealed image I r is (1; 0.25; 1) and for the figure 2C , the proportion (P 1 ; P 2 ; P 3 ) of the nested image lines i 1 , i 2 and i 3 of the revealed image I r is (1; 1; 0.25).
  • the revealed image I r can appear homogeneous to the naked eye.
  • a combined image I in the form of a colored frame formed of an alternation of red, green and blue lines of identical widths l and of a revealing frame of width of transparent raster line k .
  • the RGB coordinates are in the form of three numbers between 0 and 255 characterizing said color, each number each representing the proportion of one of the red, green and blue components making it possible to obtain said color.
  • R R max ⁇ P R
  • V V max ⁇ P V
  • B B max ⁇ P B
  • the revealed image Ir is observable in transmitted light or in reflected light both from the side of the revealing screen 4 and from the side of the combined image I when the revealing screen 4 and the combined image I are superimposed.
  • the combined image I comprises a periodic alternation of pixels of nested images p 1 to p n in two directions X and Y.
  • the pixels of nested images p 1 to p n are rectangular in shape but it could be otherwise.
  • the pixels could be of another polygonal shape, in particular a square, hexagon or rhombus.
  • the pixels of the figure 35A can also be seen as lines of diagonal nested images formed of pixels joined together by one of their corners periodically alternating in the Z direction.
  • the pixels p 1 to p n belonging to different nested images have a different appearance, in particular a different hue, saturation, brightness, transparency, luminescence.
  • the pixels p 1 to p n belonging to different nested images are of different colors, in particular red, green and blue.
  • the combined image I presents in the direction X I a period Sx and in the direction Y I a period S Y.
  • the directions X I and Y I are perpendicular but there could be otherwise.
  • the directions X I and Y I could form between them a non-zero angle different from 90 °.
  • the pixels of nested images p 1 to p n have a dimension lx and a dimension l Y according to the directions X I and Y I respectively .
  • the dimensions l X and l Y are each as described above for the nested image lines i 1 to i n .
  • the associated revelation frame 4 is according to the figure 35B . It presents a periodic alternation of blocking frame pixels 5a in two directions X T and Y T forming between them the same angle as the directions X I and Y I.
  • the blocking frame pixels 5a are separated from each other by transparent intervals 5b and are repeated according to the periods Sx and S Y of the combined image according to the respective directions X T and Y T.
  • the pixels of the revealing frame can be of a dimension mx and of a dimension m Y in the respective directions X T and Y T less than the periods S X and S Y respectively.
  • the dimension mx in the direction X T is equal to the dimension l X of the pixels of nested images p 1 to p n and the dimension m Y in the direction Y T is equal to the dimension l Y of the nested image pixels p 1 to p n
  • m X and my may be different from l X and l Y respectively, provided that the periods in the X and Y directions are the same.
  • the revelation frame When superimposing the revelation frame 4 and the combined image I so that the directions X T and X I coincide and the directions Y T and Y I coincide, the revelation frame makes it possible to observe revealed images I r as represented on the figures 35C to 35E .
  • the occulting raster pixels 5a hide one of the nested images I 1 to I n so that two of the nested images are visible.
  • the revealed image I r is formed by the nested green and red images
  • the revealed image I r is formed of the nested blue and red images
  • the revealed image I r is formed of the nested blue and green images.
  • the different revealed images I r illustrated can be obtained by moving the revealing frame 4 relative to the combined image in the direction X I , the direction Y I or the direction Z and / or by changing the viewing angle. around the directions X I and Y I or Z.
  • the user can then see a change in the revealed image I r and conclude on the basis of this observation about the authenticity of the article.
  • the revelation frame 4 can be formed from a plurality g of frame blocks B 1 to B g .
  • Each frame block B i is as described for revelation frame 4 in relation to the figures 2A to 2C and makes it possible to reveal, when the revelation frame is superimposed on the combined image I as described above and its orientation is the same, a revealed image I r1 to I rg .
  • Blocks B 1 to B g of revelation frame 4 are superimposed on the same combined image I.
  • the blocks B 1 to B g of the same frame have the same period Q and the same general orientation O b .
  • the general orientations O b of the blocks 10 define a general orientation of the frame Ot.
  • the blocks B 1 to B g have a maximum dimension v of between 1.4 and 42 mm and an area between 0.2 and 90% of the area of the revelation screen.
  • the blocks B 1 to B g have screen lines 5a of the same width m and at least two of the blocks B i and B j are out of phase with each other, that is to say have a non-zero phase shift distance dij less than the period Q, the phase shift distance dij being defined as the remainder of the division of the distance c ij between the longitudinal axis of a frame line i i of the block B i and the longitudinal axis of the line of consecutive frame i j of block B j by period Q.
  • d ij rest vs ij Q
  • the transparent frame lines 5b of the block B i do not reveal the same proportion of the nested images (P 1 ; ...; P n ) than that of block B j and therefore the images revealed I ri and I rj respectively by blocks B i and B j have different aspects because they do not have the same proportion (P 1 ; ...; P n ) nested images.
  • the revealed images I r1 to I rg of the blocks out of phase with one another are of different colors.
  • the revelation frame 4 is continuous and each of the blocks B 1 to B g has part of its outline in common with another of the blocks B 1 to B g .
  • the revealed images I r1 to I rg can form a pattern, in particular a text, an alphanumeric sign, an ideogram, a geometric shape, an object, a person and / or an animal, for example reproducing a pattern present elsewhere on the article secured.
  • the images revealed I r1 to I rg by the different blocks B 1 to B g can vary. This change in appearance can give the impression of movement or cause the color of a pattern to vary.
  • the figures 3A to 3F and 5A to 6C illustrate examples of revelation frames 4 formed of blocks B 1 to B g superimposed on a combined image.
  • the revelation frame 4 is superimposed on a combined image I formed of three nested images colored respectively in red, green and blue, as described previously.
  • the revelation frame 4 comprises six rectangular blocks B 1 to B 6 each forming approximately 1/6 th of a rectangle, as can be seen on the figure 3B .
  • Each of the blocks B 1 to B 6 has an outline common with at least two other blocks B 1 to B 6 .
  • the area of each block B 1 to B 6 is substantially between 20% and 15% of the area of the revelation screen 4.
  • Blocks B 1 , B 2 and B 3 are out of phase with each other and block B 4 is not out of phase with block B 1 , block B 5 is not out of phase with block B 2 and block B 6 is not out of phase with respect to block B 3 so that each of blocks B 1 to B 6 is out of phase with respect to blocks B 1 to B 6 which are adjacent to it.
  • the blocks B 1 and B 3 are arranged one above the 'other and have an edge 6 13 , shown by dotted lines, in common while the blocks B 1 and B 2 are arranged next to each other with an edge 6 12 in common.
  • the blackout raster lines of block B 1 have a corner 9 in common with the blackout raster lines of block B 3 . It is the same with blocks B 3 and B 5 , B 2 and B 4 , and B 4 and B 6 .
  • block B 1 is phase-shifted from block B 3 by a phase-shift distance d 13 equal to the width m of a blackout frame line. It is the same with blocks B 3 and B 5 , B 2 and B 4 , and B 4 and B 6 .
  • the distance c 12 between the last blackout frame line of block B 1 and the consecutive blackout frame line of block B 2 is equal to five times the width m of a blackout frame line.
  • the block B 1 is phase-shifted from the block B 2 by a phase-shift distance d 12 equal to twice the width m of a blackout frame line. It is the same with blocks B 3 and B 4 , and B 5 and B 6 .
  • the width m of the blackout raster line 5a is equal to the width l of a nested image line so that the transparent raster line can reveal two nested images.
  • the revealed images I r1 , I r2 and I r3 are out of phase and the respective revealed images I r1 and I r4 , Ir 2 and I r5 , and Ir 3 and I r6 are identical.
  • the revealed images I r1 to Ir 6 form a rectangle composed of 6 squares each formed by a revealed image I r1 to I r6 , each square being adjacent to squares of different colors.
  • the nested image I r1 has proportions of nested images (1; 1; 0), which corresponds to an RGB color (170, 170, 0)
  • the nested image I r2 has proportions (1 ; 0; 1), which corresponds to an RGB color (170,0, 170)
  • the nested image I r3 has proportions (0; 1; 1), which corresponds to an RGB color (0, 170 , 170).
  • the figures 3C to 3E represent images revealed I r1 to I r6 under different observation conditions.
  • the blocks B 1 to B g are distinct zones of the revelation frame 4 which do not overlap. It may be otherwise, in particular due to manufacturing tolerances.
  • the blocks B 1 to B g can be in zones of the revealing screen 4 which overlap on less than 5% of the area of the revealing screen.
  • the blackout frame lines of block B 1 have a region 11 in common with the blackout frame lines of block B 3 .
  • the blackout frame lines of block B 1 are separate from the blackout frame lines of block B 3 .
  • the distance c 12 between the last blackout frame line of block B 1 and the consecutive blackout frame line of block B 2 is equal to twice the width m of a blackout frame line.
  • the revelation frame 4 comprises sixteen blocks B 1 to B 16 each forming a disk sector.
  • Each block B 1 to B 16 is adjacent to two blocks and all the blocks B 1 to B 16 meet at the center of the disc.
  • the blocks B 1 , B 2 B 3 and B 4 are out of phase with each other and the blocks B 5 , B 9 and B 13 are not out of phase with the block B 1 , the blocks B 6 , B 10 and B 14 are not not out of phase with block B 2 , blocks B 7 , B 11 and B 15 are not out of phase with block B 3 and blocks B 8 , B 12 and B 16 are not out of phase with block B 4 so that each of the blocks B 1 to B 16 is out of phase with respect to the three blocks B 1 to B 16 which succeed it and which precede it when one turns in the direction of clockwise.
  • the shading raster lines 5a have a width m substantially equal to three quarters of the width l of the nested image lines.
  • Block B 1 is phase-shifted from block B 2 by a distance d 12 equal to three quarters of the width l of a nested image line i 1 to i 4 , block B 1 is phase-shifted from block B 3 d ' a distance d 13 equal to three half of the width l of a nested image line i 1 to i 4 and the block B 1 is phase-shifted from block B 4 by a distance d 14 equal to nine quarters of the width l of a nested image line i 1 to i 4 .
  • the revealed images I r1 to I r16 form a disc composed of 16 sectors each formed by a revealed image I r1 to I r16 , each sector being situated between sectors of different colors.
  • the nested image I r1 presents proportions of nested images (1; 0.25; 1), that is to say an RGB color of approximately (191, 48, 191)
  • the nested image I r2 presents proportions (0.5; 0.75; 1), i.e. an RGB color of approximately (95, 143, 191)
  • the nested image I r3 has proportions (0.5; 1; 0.75), i.e. a RGB color of about (95, 191, 143)
  • the nested image I r4 has proportions (1; 1; 0.25), or an RGB color of about (191, 191,48).
  • the figures 5B to 5D represent images revealed I r1 to I r16 under different observation conditions.
  • the revelation frame 4 comprises four blocks B 1 to B 4 of different shapes.
  • the block B 2 represents the number 1
  • the blocks B 3 and B 4 represent the number 0
  • the block B 1 is a rectangular block in which the other blocks are inserted. All the blocks B 1 to B 4 are out of phase with one another.
  • the images are schematic for illustrative purposes however when observing the revelation frame alone shown in the figure 6A , the pattern "100" is not distinguishable at a normal viewing distance, between 30 cm and 10 cm and preferably 15 cm.
  • the occulting raster lines 5a have a width m substantially equal to three quarters of the width l of the nested image lines, as in the example of figures 5A to 5D .
  • the revealed images I r1 to I r4 form the number 100 on a colored background, the colors of all the numbers being different.
  • the figures 6B to 6C represent images revealed I r1 to I r4 under different observation conditions.
  • At least two blocks B i and B j have blackout frame lines of respective widths m i and m j that are different.
  • the lines of transparent frames 5b of the block B i do not reveal the same proportion of the lines of nested images (P 1 ; ...; P n ) than that of block B j and therefore the images revealed I ri and I rj respectively by blocks B i and B j do not have the same proportion (P 1 ; ...; P n ) nested images.
  • the revealed images I r1 to I rg of the blocks of widths m 1 to m g are of different colors.
  • Each sub-block 15 allows the observation of an image revealed I r by superposition on the combined image.
  • the revealed image is of the same shape as for a block having an occulting raster line of the same width and in the case of image (ii), the revealed image obtained depends on the position and the width of the weft lines 15a and 15b.
  • the combined image I illustrated on figure 11A comprises blocks C 1 to C 3 and the revelation frame 4 is in the form of a single block.
  • the blocks of the combined image are each as described in relation to the figure 1 .
  • the combined image blocks C1 to C3 are in rectangular form.
  • the blocks C 1 and C 2 are out of phase with one another by a width l of a nested image line and the blocks C 1 and C 3 are not out of phase with one another.
  • the revealing screen has lines of opaque screens 5a having a width m equal to the width l of a line i 1 to i 3 of nested images.
  • the revealed images I r1 and I r3 are composed of all the red and blue lines and therefore present a proportion (1; 0; 1) of the nested images and the revealed image I r2 is composed of all the red lines and green and has a proportion (1; 1; 0) of the nested images.
  • the revealed images I r1 to I r3 change, for example going from the figure 11B of figures 11C and 11D .
  • a secure article 10 comprises a non-opaque substrate 20, for example perfectly transparent, having a first face 20a carrying the combined image I.
  • the second face 20b of the substrate 2, opposite to the first, carries the weft of revelation 4.
  • the revelation frame 4 makes it possible to observe one or more revealed images I r .
  • the user changes the observation conditions and the revealed image (s) I r are modified as described above.
  • the thickness e of the substrate is preferably greater than or equal to approximately the period Q.
  • a substrate whose thickness e is less than or equal to 30 ⁇ m, better still 25 ⁇ m, for example between 20 and 30 ⁇ m, or even 20 and 25 ⁇ m, limits included or excluded.
  • Another possibility for varying the direction of observation of the secure article may be to deform the substrate, for example around a folding axis, as illustrated in figure 13 .
  • the combined image I can be obtained by micro-photolithography of the thread and the revelation screen 4 can be produced by means of offset printing with inks crosslinking under UV carried out in a second step, when printing the article.
  • the revelation screen 4 can be associated, where appropriate, with a print pattern of the article.
  • the pattern of the revelation screen 4 can be printed elsewhere than in superposition with the combined image I, on the article, at the same scale or at a different scale.
  • the printing of the revelation screen 4 may extend beyond the combined image I and extend over the secure article 10, as illustrated in figure 14 .
  • the secure article 10 may include at least two windows 31 and 32 allowing each of the faces of the wire to be observed respectively, in reflection.
  • the article may include, at the level of the windows 31 and 32, gaps in material and transparent zones 35 and 36 allowing the observation of the images revealed on both sides of the secure article 10.
  • the nested images are observable through the reveal screen 4 on the side of the window 31 and with the reveal screen as a background, on the side of the window 32.
  • the article 10 may also include a through window 31, as shown in figure 16D , the revelation frame 4 and the combined image I being located at least partially in this through window. In this way, it is possible to observe the images revealed on both the front side and the back side of the secure article 10.
  • the disclosure frame 4 and the combined image in the form of a security thread can still be incorporated into a secure article 10 which have alternating windows 31 and 32 on the front side and on the back side, as illustrated in figure figure 16C . It is thus possible to observe the images revealed both on the front side and on the back side of the secure article 10 at the level of the windows 31 and 32, and in particular due to the presence of the shortages of material and of the transparent zones 35. and 36.
  • FIG. 17 We have represented on the figure 17 an example of a secure article 10 comprising a perforation 40 in which are placed at least partially two sub-elements, in particular in the form of foils or patches, 41 and 42.
  • the sub-element 41 comprises for example a revelation frame 4 and the sub-element 42 comprises for example the corresponding combined image I.
  • the sub-elements 41 and 42 can be superimposed at least partially on the edges of the perforation 40 with or without a thickness compensation.
  • the sub-elements 41 and 42 can be at least partially transparent or translucent.
  • the observation of the revealed images can be done by observation in reflection or in transmission, for example using a light source located behind the article 10 during the observation.
  • the secure article 10 comprises a combined image I produced in the form of impressions.
  • the prints are for example made on the surface of the secure article 10.
  • a sub-element 43 in particular in the form of a foil or patch, is placed on the prints constituting the combined image I, the sub-element 43 comprising the corresponding revealing screen 4, for example produced on the surface of the sub-element 43.
  • the secure article 10 may or may not be opaque.
  • the secure article 10 can be at least partially transparent or translucent to allow observation of the nested images, in particular on the side of the combined image I.
  • the combined image comprises two metallizations of different colors each corresponding to a nested image, in particular a nested copper image and a nested aluminum image.
  • the combined image comprises at least two metallizations, in particular of the same color, of different optical densities each corresponding to a nested image, thus creating a brightness contrast.
  • the nested aluminum image can be of high optical density, which makes it look shiny.
  • the revelation screen 4 may have a matt appearance.
  • the superposition of the combined image I and of the revelation screen 4 makes it possible to obtain, according to the blocks B 1 to B g , dull or shiny revealed images I r1 to I rg.
  • a displacement of the revealing frame 4 relative to the combined image I along the X axis can make it possible to reverse the appearance of the revealed images I r1 to I rg at the level of the different blocks B 1 to B g , c ' that is to say that the revealed images I r1 to I rg which were bright can become dull and vice versa.
  • the secure article 10 comprises a window 50, preferably at least partially transparent, in which appears the revelation frame 4.
  • the article 10 also comprises a combined image I carried on the article 10, for example by printing, in particular intaglio printing, offset printing or metallization and / or demetallization.
  • the zone in which the combined image 2 appears can also be at least partially transparent.
  • the user To observe the revealed image, the user must therefore fold the secure article 10, as illustrated in figure 20 , to bring the revelation frame 4 back to the combined image I so that their general orientation is the same and observe the image (s) revealed I r .
  • the revealed images are not visible when the article 10 is not folded and it takes user action, namely folding the secure article 10, to make them appear.
  • the secure article 10 comprises a window 50, preferably at least partially transparent, in which appears the combined image I.
  • the article 10 also comprises a patch 55 comprising for example holographic prints, on which the revelation screen appears. 3.
  • the patch 55 can also be at least partially transparent.
  • the patch 55 may include metallizations and / or demetallizations, for example made of aluminum, and the revelation screen 4 may include holographic impressions and / or metallizations and / or demetallizations.
  • article 10 comprises a window 50, preferably at least partially transparent, in which appears the revelation screen 4.
  • Article 10 also comprises a security thread 60 on which appears the combined image I.
  • the security thread 60 can also be at least partially transparent or include a partially transparent zone at the level of the combined image I.
  • article 10 comprises a security thread 60 of sufficient width to alternately display combined images I and revelation screens 4.
  • the security thread 60 is at least partially transparent or has one or more zones. at least partially transparent at the level of the combined images I and / or of the revealing frames 4.
  • article 10 comprises a security thread 60 on which appears a revelation screen 4.
  • Article 10 also comprises a combined image I, for example in the form of an offset printing on article 10.
  • the security thread 60 can be at least partially transparent or have an at least partially transparent zone.
  • the article 10 can also include an area at least partially transparent at the level of the combined image I.
  • article 10 has two security threads 60a and 60b.
  • the security thread 60a comprises three combined images I and the security thread 60b comprises three revelation frames 4.
  • the security thread 60a and / or the security thread 60b can be at least partially transparent or comprise at least one at least partially transparent zone, in particular at the level of a combined image I or of a revelation screen 4.
  • article 10 comprises a foil 70 on which appears an alternation of combined images I and revelation frames 4.
  • the foil 70 can be at least partially transparent or comprise at least one zone at least partially transparent at the level of a combined image I and / or of a revelation frame 4.
  • article 10 comprises a security thread 60 on which appears a combined image I.
  • Article 10 also comprises a patch 55, which may or may not include holographic metallizations, on which appears a revelation screen 4.
  • the security thread 60 can be at least partially transparent or include an at least partially transparent zone at the level of the combined image I.
  • the patch 55 can also be at least partially transparent, in particular at the level of the revelation screen 4.
  • the combined images I and the revealing frames 4 can be inverted.
  • the at least partially transparent zones can be situated at the level of the combined images I or of the revealing means 4, or at the level of both at the same time.
  • the security thread (s) 60, 60a and 60b can be introduced into the secure article 10 in a conventional manner, for example on the surface, in bulk or in window (s).
  • Authentication of the articles 10 can be accomplished by folding them 10 lengthwise or crosswise so as to at least partially overlap the combined images I and disclosure screens 4, and then moving relatively relative to each other. others so as to visualize, for example, the illusion of movement and / or by modifying the angle of observation of the combined images I and of the superimposed revelation screens 4.
  • the article or the assembly can comprise two revelation frames 4a and 4b as described above being superimposed on the same combined image I.
  • the two revelation frames are preferably of different general orientations O ta and O tb forming between them a non-zero angle ⁇ , preferably between 0 ° and 180 °, limits excluded, better still between 10 and 30 °, for example here substantially equal to 20 °.
  • the user To observe the images revealed by one or the other of the frames, the user must therefore superimpose the combined image I and the revealing frames 4a and 4b by folding article 10 or superimposing article 10 and of another object and rotate the combined image I with respect to the revealing frames 4a and 4b.
  • the user can also move them relative to each other along an axis perpendicular X to the general orientation of the combined image to observe a change in the image (s) revealed in one of the frames.
  • the two revelation frames 4a and 4b may or may not be separated from each other.
  • the disclosure frame 4b is an inclusion in the disclosure frame 4a.
  • the first revealing frame 4a is square in shape and is formed of 17 blocks B 1a to B 17a , in particular a central block B 1a of substantially square shape flanked by 16 side blocks B 2a to B 17a also of square shape.
  • 12 side blocks B 2a to B 13a are juxtaposed all around the central block B 1a to form a square of width equal to twice the width of the central block B 1a and 4 side blocks B 14a to B 17a ) are each superimposed completely in two 12 side blocks B 2a to B 13a respectively to blocks B 3a and B 4a , B 6a and B 7a , B 9a and B 10a , and B 12a and B 13a .
  • the blocks B 1a to B 17a are all substantially square in shape.
  • the side blocks B 2a to B 17a are of width substantially equal to half the width of the central block B 1a .
  • the superposition of the side blocks B 14a to B 17a on the other side blocks B 2a to B 13a allows the formation of 8 sub-blocks as described above.
  • Each lateral block B 2a to B 13a is out of phase with respect to the lateral block B 2a to B 13a which precedes it and which succeeds it.
  • the side blocks B 2a , B 5a , B 8a and B 11a forming the corners of the revealing screen 4 are not out of phase with each other and are not out of phase with respect to the central block B 1a .
  • the second revelation frame 4b is rectangular in shape and it is formed of 4 blocks B 1b to B 4b of different shapes.
  • Block B 2b represents number 1
  • blocks B 3b and B 4b represent number 0
  • block B 1b is a rectangular block in which the other blocks are inserted.
  • the blocks B 2b to B 4b are not out of phase with one another but are out of phase with respect to the block B 1b .
  • the two revelation frames 4a and 4b have respective general orientations O ta and O tb which are different and form between them an angle ⁇ substantially equal to 20 °.
  • the occulting raster lines 5a have a width m substantially equal to three quarters of the width l of the nested image lines, as in the example of figures 5A to 5D .
  • the revelation screens 4a and 4b are superimposed on the same combined image I, illustrated on the figure 28A .
  • blocks B 1a to B 17a reveal revealed images I r1a to I r21a forming a central square I r1a surrounded by squares smaller I r2a to I r21a of different colors.
  • the color of the small squares I r2a , I r5a , I r8a and I r11a in the corners is the same as that of the central square I r1a .
  • the second revelation frame 4b does not form any visible image due to a Moiré phenomenon between the lines of the second revelation frame 4b and the lines of the combined image I.
  • the figures 28C and 28D represent images revealed under different observation conditions but always with the same orientation of the revelation frames 4a and 4b and of the combined image. The color of the revealed images changes.
  • the revealed images I r1b to I r4b form the number 100 on a colored background, the colors of all the numbers being identical.
  • the first revelation frame 4a does not form a visible image due to a Moiré phenomenon between the lines of the first revelation frame 4a and those of the combined image I.
  • the figures 28E and 28F represent images revealed under different observation conditions always with the same orientation of the revelation frames 4a and 4b and of the combined image. The color of the revealed images changes.
  • the superposition of the revelation frame 4 and of the combined image I can be done by folding the secure article 10 and the change of orientation can be done by rotating the part of the secure article 10a carrying the combined image I with respect to the part of the secure article 10b bearing the revelation frame 4.
  • the electronic imager 100 is for example a computer screen on which is displayed a first image 110, the first image 110 being the revealing frame 4 or the combined image I.
  • the secure article 10 is for example in the form of a banknote and comprises a second image 120, the second image being the revealing frame 4 if the first image is the combined image and vice versa.
  • the secure article 10 is placed on the screen of the electronic imager 100 so as to at least partially superimpose the first image 110 on the second image 120 in order to observe the revealed image (s) I r and to deduce therefrom authentication information. and / or identification of the secure article 10.
  • the secure article 10 can be moved relative to the screen of the electronic imager 100 or the observer can change the viewing angle to allow observation of a change in the revealed image (s) I r .
  • the secure article 10 remains stationary relative to the screen of the electronic imager 100 and the first image 110 is animated by a movement on the screen, for example a translation, for example using 'a program activated or not by the user.
  • the electronic imager 100 is for example in the form of a digital projector, projecting a first image 110 on a background 150, for example the wall of a room.
  • the secure article 10 comprising the second image 120 can then be superimposed at least partially on the first image 110 projected onto the background 150 to allow the observation of the revealed image (s) I r .
  • the electronic imager 100 is a projector which projects the first image 110 directly onto the secure article 10.
  • the first image 110 can, as in the example of the figure 31 , be projected, for example in the form of a “W”, onto an area of the secure article 10 where the second image 120 is not present. Then, the secure article 10 is for example folded on itself so in superimposing the second image 120, for example in the form of an “A”, on the first image 110 projected by the electronic imager 100.
  • the part of the secure article 10 comprising the second image 120 can in particular be folded over the part comprising the first image 110, this part remaining stationary, so that the first image 110 is situated between the imager 100 and the second image 120.
  • the first image 110 is projected directly onto the second image 120 of the article 10.
  • the projection of the first image 110 onto the second image 120 of the article 10 can allow superimposition on the surface. less partial of the first and second images.
  • the imager electronics 100 can be moved relative to item 10 to move revealing frame 4 relative to combined image I.
  • the electronic imager 100 is a screen displaying several first images 110a, 110b, 110c and 110d.
  • the first images 110a to 110d can have different properties, for example different shapes, colors, dimensions, frame elements.
  • the first images 110a to 110d are differentiated so as to allow at least one of them to be associated with at least one second image 120 present on an article 10.
  • the article 10 comprises several second different images 120, as can be seen for example on the figure 15 , and the electronic imager 100 produces one or more first images 110.
  • the electronic imager 100 produces one or more first images 110.
  • the electronic imager 100 can display one or more indicators 140a, 140b, 140c and 140d making it possible to inform the user on how to position the article 10 shown on the diagram. figure 33 relative to the imager.
  • the indicators 140a to 140d can make it possible to know where to position the upper right corner of the article 10, so as to correctly superimpose a second image 120 of an article 10 on a first displayed image 110a, 110b, 110c or 110d. on the screen of the electronic imager 100.
  • the article 10 can comprise an integrated microcircuit 152, for example an RFID or optical chip, making it possible to communicate with the electronic imager 100 in order to control the display of an indicator as described above or to broadcast information on the manner to position the first and second images.
  • an integrated microcircuit 152 for example an RFID or optical chip
  • the chip 152 is able to communicate with the electronic imager 100 to make it possible to produce the first image 110 associated with the second image 120.
  • the second image 120 is illuminated with the electronic imager 100.
  • the chip 152 comprises information transmitted to the electronic imager 100 which projects or then displays the first image 110 based on this information.
  • the article 10, in particular the second image 120, can be photographed and / or filmed by a digital camera belonging to or linked to the electronic imager 100.
  • a recognition program can then make it possible to recognize the second image 120 and to acquire from there.
  • a database a first image 110 associated with the second image 120.
  • the database is for example stored on a secure server.
  • the first image 110 thus obtained is displayed and / or projected by the electronic imager 110 to make it possible to authenticate and / or identify the article 10.
  • the electronic imager 100 is in the form of a portable telephone on which is displayed a first image 110 in the form of a combined image I.
  • the article 10 comprises a polarizing filter on which the second image 120 has been formed under form of revealing frame 4.
  • the article 10 comprising the second image 120 in the form of revealing frame 4 is superimposed on the first image 110 in the form of combined image I produced by the electronic imager 100, the latter emitting a polarized light.
  • the article 10 comprising the revealing screen 4 can be moved by a translational movement along the X axis relative to the combined image I displayed by the screen of the electronic imager 100, so as to change the or the images revealed I r .
  • Such a method makes it possible to authenticate and / or identify the security article 1 according to several security levels.
  • the electronic imager 100 is a screen, in particular of the LCD type, comprising a plurality of pixels preferably forming a combined image, for example as described in figure 35A .
  • the invention is not limited to the examples illustrated.
  • the secure article can be made with other first, second or third level securities, for example.

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Claims (14)

  1. Gesicherter Artikel (10), der ein aufdeckendes Raster (4) und ein kombiniertes Bild (I) umfasst, oder Anordnung, die einen gesicherten Artikel (10) und einen weiteren Gegenstand (100) umfasst, wobei der gesicherte Artikel (10) das eine unter dem aufdeckenden Raster (4) und dem kombinierten Bild (I) umfasst und der Gegenstand (100) das andere unter dem aufdeckenden Raster (4) und dem kombinierten Bild (I) umfasst oder bildet,
    wobei das kombinierte Bild (I) aus einer Vielzahl von verschachtelten Bildern (I1 bis In) zusammengesetzt ist, wobei das kombinierte Bild (I) eine periodische Wechselfolge gemäß einer ersten Richtung (X; XI, YI) von Elementen verschachtelter Bilder (i1 bis in; p1 bis pn) umfasst, wobei die Elemente (i1 bis in; p1 bis pn), die demselben verschachtelten Bild (I1 bis In) angehören, die gleiche Farbe haben und die Elemente (i1 bis in; p1 bis pn), die unterschiedlichen verschachtelten Bildern (I1 bis In) angehören, unterschiedliche Farben haben, wobei der Farbabstand ΔE*94 nach C.I.E. 1994 der Elemente verschachtelter Bilder (i1 bis in; p1 bis pn), die verschiedenen verschachtelten Bildern (I1 bis In) angehören, größer oder gleich 2 ist,
    wobei das aufdeckende Raster (4) eine periodische Wechselfolge entlang einer zweiten Richtung (X; XT, YT) aus einem verbergenden Rasterelement (5a) und einem nicht verbergenden Rasterelement (5b) umfasst,
    wobei das Maß der nicht verbergenden Rasterelemente (5b) entlang der zweiten Richtung (X; XT, YT) größer als das Maß mindestens eines Elements verschachtelter Bilder (i1 bis in; p1 bis pn) entlang der ersten Richtung (X; XI, YI) ist,
    wobei die Periode (Q) des aufdeckenden Rasters (4) in der zweiten Richtung (X; XT, YT) gleich der Periode (S) des kombinierten Bildes (I) in der ersten Richtung (X; XI, YI) ist, wobei das aufdeckende Raster (4) es, wenn es dem kombinierten Bild (I) überlagert wird und die erste Richtung und die zweite Richtung ausgerichtet sind, ermöglicht, aufgedeckte Bilder (Ir; Ir1 bis Irg; Ir1a bis Irga, Ir1b bis Irub) unterschiedlicher Farben durch Verlagern des aufdeckenden Rasters (4) in Bezug auf das kombinierte Bild (I) und/oder durch Ändern des Betrachtungswinkels zu betrachten, wobei die aufgedeckten Bilder durch Elemente der verschachtelten Bilder gebildet werden, die sich mit nicht verbergenden Rasterelementen überlagern, wobei die aufgedeckten Bilder (Ir; Ir1 bis Irg; Ir1a bis Irga, Ir1b bis Irub) jeweils mit bloßem Auge aus einem normalen Betrachtungsabstand einfarbig erscheinen, wobei die Farbe jedes aufgedeckten Bildes durch die Anteile jedes verschachtelten Bildes definiert wird, die sich den nicht verbergenden Rasterelementen überlagern.
  2. Artikel oder Anordnung nach Anspruch 1, wobei mindestens ein aufgedecktes Bild (Ir; Ir1 bis Irg; Ir1a bis Irga, Ir1b bis Irub) aus mindestens zwei benachbarten verschachtelten Bildern besteht.
  3. Artikel oder Anordnung nach Anspruch 1 oder 2, wobei das aufdeckende Raster (4) eine periodische Wechselfolge aus einem verbergenden Rasterelement (5a) und einem nicht verbergenden Rasterelement (5b) entlang mehrerer Richtungen (X; XT, YT) umfasst, wobei das verbergende Rasterelement (5a) und das nicht verbergende Rasterelement (5b) bevorzugt unterschiedliche Opazitäten, Transparenzen und/oder Farbtöne haben.
  4. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei das kombinierte Bild (I) eine periodische Wechselfolge von Elementen verschachtelter Bilder (i1 bis in; p1 bis pn) entlang mehrerer Richtungen (X; XT, YT) umfasst.
  5. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei sich die Elemente (i1 bis in; p1 bis pn), die unterschiedlichen verschachtelten Bildern (I1 bis In) angehören, durch ihr Erscheinungsbild, insbesondere ihre Farbtöne, Opazitäten, Sättigungen, Helligkeiten oder Glanzgrade unterscheiden, wobei bevorzugt die Elemente (i1 bis in; p1 bis pn), die unterschiedlichen verschachtelten Bildern (I1 bis In) angehören, unterschiedliche Farbtöne haben, wobei das kombinierte Bild (I) drei verschachtelte Bilder (I1, I2, I3) in bevorzugt Primärfarben umfasst, insbesondere in den Farben Rot, Grün und Blau.
  6. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei die Elemente verschachtelter Bilder (i1 bis in; p1 bis pn) ein Maß (l) entlang der oder jeder der Richtungen (X; XT, YT) kleiner oder gleich 1 mm, besser kleiner oder gleich 100 µm, noch besser kleiner oder gleich 50 µm haben.
  7. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei die Elemente verschachtelter Bilder (i1 bis in) und die Rasterelemente (5a, 5b) die gleiche Grundform haben.
  8. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei das kombinierte Bild (I) eine Auflösung größer oder gleich 800 dpi aufweist.
  9. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, der oder die so gestaltet ist, dass die aufgedeckten Bilder (Ir) im Auflicht und/oder im Durchlicht betrachtbar sind, und/oder so gestaltet sind, dass die aufgedeckten Bilder (Ir) sowohl von der Seite des aufdeckenden Rasters (4) aus als auch von der Seite des kombinierten Bildes (I) aus betrachtbar sind.
  10. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei die aufgedeckten Bilder (Ir) Makromuster bilden, die unterschiedliche Erscheinungsbilder, insbesondere unterschiedliche Farben und/oder Glanzgrade, aufweisen, beispielsweise unterschiedliche RGB-Koordinaten und/oder unterschiedliche Muster, insbesondere die verschiedenen Schritte einer Bewegung.
  11. Artikel oder Anordnung nach einem der vorhergehenden Ansprüche, wobei sich mindestens eines unter dem kombinierten Bild (I) und dem aufdeckenden Raster (4) in einem zumindest teilweise transparenten Bereich des gesicherten Artikels (10) oder des Gegenstands befindet, wobei die Überlagerung des aufdeckenden Rasters (4) und des kombinierten Bildes (I) durch Falten des gesicherten Artikels (10) oder durch Überlagern des gesicherten Artikels (10) mit dem anderen Gegenstand erfolgt, wobei das aufdeckende Raster (4) es, wenn es dem kombinierten Bild (I) des gesicherten Artikels (10) oder des anderen Gegenstands (100) zumindest teilweise überlagert wird, ermöglicht, durch eine relative Verlagerung des aufdeckenden Rasters (4) in Bezug auf das kombinierte Bild (I) und/oder durch eine Änderung des Betrachtungswinkels des aufdeckenden Rasters (4) und des kombinierten Bildes (I) unterschiedliche aufgedeckte Bilder (Ir) zu betrachten.
  12. Artikel nach einem der vorhergehenden Ansprüche, wobei das aufdeckende Raster (4) und das kombinierte Bild (I) überlagert sind und dabei voneinander durch ein Intervall mit konstanter Dicke getrennt sind, wobei das Intervall insbesondere durch ein transparentes oder transluzentes Substrat (20) gebildet wird, das auf der Seite einer ersten Seite des Substrats (20a) das kombinierte Bild (I) und auf der Seite einer zweiten Seite des Substrats (20b), die zu der ersten entgegengesetzt ist, das dem kombinierten Bild (I) überlagerte aufdeckende Raster (4) aufweist, wobei der Artikel oder die Anordnung bevorzugt so gestaltet ist, dass das aufdeckende Raster (4) es ermöglicht, bei einer Änderung des Betrachtungswinkels des gesicherten Artikels unterschiedliche aufgedeckte Bilder (Ir; Ir1 bis Irg; Ir1a bis Irga, Ir1b bis Irub) zu betrachten.
  13. Anordnung nach einem der Ansprüche 1 bis 11, wobei der andere Gegenstand ein elektronischer Bildgeber (100) ist, der es ermöglicht, ein erstes Bild (110) zu bilden, wobei das erste Bild (110) das aufdeckende Raster (4) oder das kombinierte Bild (I) ist, um es einem zweiten Bild (120) des gesicherten Artikels (10) überlagern zu können, wobei das zweite Bild (120) das andere unter dem aufdeckenden Raster (4) und dem kombinierten Bild (I) ist.
  14. Verfahren zur Authentifizierung eines gesicherten Artikels (10) nach einem der vorhergehenden Ansprüche, bei dem man das durch das aufdeckende Raster (4) aufgedeckte Bild (Ir) betrachtet, man den Betrachtungswinkel und/oder die Position des aufdeckenden Rasters (4) in Bezug auf das kombinierte Bild (I) ändert, um eine Änderung des aufgedeckten Bildes (Ir) zu betrachten, und man angesichts der betrachteten Bildänderung Schlussfolgerungen im Hinblick auf die Echtheit des Artikels (10) zieht.
EP16822190.1A 2015-12-29 2016-12-23 Sicherer artikel mit einem kombinierten bild und/oder einem aufdeckungsbildschirm Active EP3397502B1 (de)

Applications Claiming Priority (2)

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FR1563423A FR3046109B1 (fr) 2015-12-29 2015-12-29 Article securise comportant une image combinee et/ou une trame de revelation
PCT/EP2016/082652 WO2017114804A1 (fr) 2015-12-29 2016-12-23 Article securise comportant une image combinee et/ou une trame de revelation

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FR (1) FR3046109B1 (de)
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FR3120567B1 (fr) 2021-03-12 2023-04-14 Oberthur Fiduciaire Sas Article de sécurité ou ensemble d’un article de sécurité et d’un autre objet comportant une première et une deuxième trame

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EP3397502A1 (de) 2018-11-07
WO2017114804A1 (fr) 2017-07-06
KR20180098650A (ko) 2018-09-04
CN108883653A (zh) 2018-11-23
CN108883653B (zh) 2020-11-06
US20180304668A1 (en) 2018-10-25
FR3046109A1 (fr) 2017-06-30
RU2726740C2 (ru) 2020-07-15
BR112018013450A2 (pt) 2018-12-04
RU2018123603A3 (de) 2020-02-17
RU2018123603A (ru) 2020-01-30
FR3046109B1 (fr) 2022-02-18

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