EP3397501B1 - Article securise comportant une image combinee et/ou une trame de revelation - Google Patents

Article securise comportant une image combinee et/ou une trame de revelation Download PDF

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Publication number
EP3397501B1
EP3397501B1 EP16822188.5A EP16822188A EP3397501B1 EP 3397501 B1 EP3397501 B1 EP 3397501B1 EP 16822188 A EP16822188 A EP 16822188A EP 3397501 B1 EP3397501 B1 EP 3397501B1
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EP
European Patent Office
Prior art keywords
image
images
blocks
combined image
raster
Prior art date
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Active
Application number
EP16822188.5A
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German (de)
English (en)
French (fr)
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EP3397501A1 (fr
Inventor
Philippe Dietemann
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Oberthur Fiduciaire SAS
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Oberthur Fiduciaire SAS
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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
    • B42D25/342—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
    • B42D25/305—Associated digital information
    • 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
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/391—Special inks absorbing or reflecting polarised light
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms

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 driver's 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 driver's license
  • a secure card such as a lottery ticket, a transport ticket or an entrance ticket to events.
  • WO 2011/007344 A1 describes a secure article comprising a first optical structure and a second optical structure, or an assembly comprising a secure article and another object, the secure article comprising one of the first optical structure and the second optical structure and the object comprising or forming the other of the first optical structure and the second optical structure, having most of the features of claim 1.
  • WO 2011/007344 A1 in alternative a) of claim 1, does not describe that the first optical structure comprises corresponding frame elements of different dimensions according to the or at least one of the directions, does not describe that the first optical structure comprises corresponding frame elements out of phase with one another along an axis perpendicular to the one or one of their directions.
  • WO 2011/007344 A1 in alternative b) of claim 1, does not describe that the at least two blocks of first optical structure comprise corresponding nested image lines of different dimensions according to the or at least one of the directions, does not describe that the at least two blocks of a first optical structure comprise nested image lines phase-shifted between them along an axis perpendicular to the one or one of their directions.
  • the invention aims to meet this need and has for object, according to a first of its aspects, a secure article comprising a first optical structure and a second optical structure, or an assembly comprising a secure article and another object, as defined by claim 1.
  • the invention it is possible to benefit from a secure article offering a new means of authentication, consisting in the formation of revealed images. different, leading for example to the formation of a particular colored pattern easily recognizable by the man in the street.
  • 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 item and the other item are banknotes, especially 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.
  • each block lets appear a certain proportion of each of the nested images of the combined image to form the revealed image .
  • 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 at the level of the corresponding block 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 at all obscured by the revelation frame at the level of the corresponding block.
  • the combined image or each of the combined image blocks comprises a periodic alternation of nested image elements in one or more directions.
  • the combined image or each of the combined image blocks can comprise at least two nested images, preferably at least three.
  • the combined image or each of the combined image blocks may 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, luminescence or brightness, and / or present a contrast, in particular a saturation contrast , of intensity, of hue and / or of luminance, and / or a sufficient colorimetric difference to make it possible to distinguish, in particular under white light, two adjacent nested image elements when they are observed with a certain magnification. So at least two of the, better all, nested images, look different.
  • the nested image elements of the same nested image are preferably of the same color but of a different color from those of the other nested images.
  • the image revealed by each of the blocks can then be an image whose color is defined by the proportion of each visible nested image, that is, the proportion of each color.
  • Images revealed at two or more blocks are of different colors.
  • the combined image or each combined image block comprises three nested images of respective colors red, green and blue and each revealed image is of a color depending on its proportion in each of the nested images, the color can easily be changed. 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 relative to the combined image and a given observation 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 or each combined image block, and the nested images that it or it comprises, are raster images; the combined image or each combined image block 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 elements of nested images are preferably all of the same dimension in the or each of the directions.
  • the dimension of the elements of nested images according to the or one 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 elements of nested images are joined.
  • Each nested picture element can partially overlap 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 have the same general shape.
  • the combined image or each combined image block comprises a periodic alternation of lines of nested images, of longitudinal axes mutually parallel in one direction.
  • the longitudinal axes of the nested image lines define a general orientation of the combined image or each combined image block.
  • Each nested image is formed of continuous or discontinuous 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 lines adjacent, the latter defining the period of the combined image or of the combined image block.
  • 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 lines of nested images 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, still better 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 or each combined image block 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 or each combined image block can be as such, that is to say by being observed directly without passing through the revealing screen, of homogeneous appearance to the naked eye and at a distance normal observation given its finesse.
  • the combined image may appear to the naked eye and 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 and 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 can be arranged so that the revealed images each appear a solid color.
  • the combined image and / or each combined image block 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 of 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 or each revelation frame block comprises a periodic alternation of two frame elements in one or more directions.
  • the disclosure frame or each frame block comprises at least four frame elements, more preferably at least six.
  • the revelation frame or each frame block comprises a periodic alternation of at least three frame elements.
  • a revelation frame or a frame block comprising a periodic alternation of an infinity of frame elements forms a periodic gradient.
  • the screen elements are preferably of different opacities, transparencies and / or colors, in particular one screen element is opaque and the other element is at least partially transparent.
  • each block is formed from 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 reveal screen is a color filter which does not allow any of the colors of the combined image to pass.
  • a revealed image obtained by a revelation screen or a screen block having small-dimension occulting screen elements has a greater proportion of nested images, in particular of colors , than a revealed image obtained with a revealing frame or a frame block having larger-dimension occulting frame elements.
  • 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 are located between the revealing frame and the viewer, and the blackout elements prevent the viewer from discerning the blackout elements of the nested image 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-blackout element corresponds to the width along this direction of the perfectly transparent zone or of sufficiently low uniform opacity or of sufficiently light shade. In these examples, 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 the one 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 disclosure frame comprises a finite number of frame elements. More preferably, the screen elements do not exhibit any gradient.
  • the non-blackout elements are each opacity or luminosity (L * in the system (L *, a *, b *) CIE94) uniform, which can be zero, respectively weak, and the blackout elements are also preferably opacity or uniform brightness.
  • the revelation frame or each block can comprise at least 5 blackout frame elements according to the or each of its directions.
  • the revelation frame or each frame block comprises a periodic alternation of two frame lines of longitudinal axes parallel to each other.
  • the two screen lines have parallel longitudinal axes and define a general orientation of the revealing screen or of the block.
  • each weft line is of constant width over its entire length, its 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 have a homogeneous appearance to the naked eye and at a normal viewing distance, taking into account its fineness.
  • the revelation screen can appear observed with the naked eye at a normal viewing distance and in white light as having a uniform appearance, in particular a color.
  • the revealing grid 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 pattern more complex, in particular a pattern representing a text, an alphanumeric sign, an ideogram, an object, a person, a plant, a monument and / or an animal.
  • the disclosure frame can include an inclusion of another security means, in particular of another disclosure frame.
  • the revealing frame may comprise a plurality of frame blocks, the combined image comprising a single combined image block and being composed of a plurality of nested images.
  • the revealing frame comprises a single frame block and the combined image has a plurality of combined image blocks, each combined image block being composed of a plurality of nested images.
  • the revelation frame and the combined image can each be formed from several blocks, each combined image block being composed of a plurality of nested images.
  • Said at least two blocks of first optical structure preferably have the same or the same general orientations.
  • 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 general orientations. Therefore, when the revealing frame and the combined image are superimposed, the frame elements overlap with the nested image elements of the combined image; the blackout frame elements prevent viewing of a portion of the nested image elements of the combined image, and the non-hidden nested image elements form the revealed images.
  • Said at least two blocks of first optical structure are preferably of the same period, in particular according to the direction or directions.
  • the period of the revealing frame or of each of the frame blocks in one direction is substantially equal to the period of the combined image or of each of the combined image blocks in at least one of these directions.
  • said at least two blocks of first optical structure preferably have the same general block orientation, and preferably the raster or combined image lines of these blocks have axes parallel longitudinal.
  • all the blocks of the same first optical structure have the same general orientation and define a general orientation of the first optical structure.
  • Each of the blocks of the first optical structure may have a larger dimension between 1.4 mm and 42 mm.
  • Each of the blocks of the first optical structure may represent less than 90% of the total area of the first optical structure and more than 0.2% thereof.
  • Said at least two blocks of first optical structure can be arranged in distinct zones of the first optical structure.
  • Said at least two blocks of first optical structure preferably have part of their contours in common.
  • Each block of the first optical structure may have an outline of any shape, for example circular, oval, in disc section, star, polygonal, for example rectangular, square, triangular, hexagonal, pentagonal or rhombus, or form a more complex, in particular a motif representing a text, an alphanumeric sign, an ideogram, an object, a person, a plant, a monument and / or an animal.
  • All the blocks of the first optical structure can have a contour of the same shape; in a variant, the blocks have contours of different shapes.
  • the area and / or the length and / or the width and / or the greatest dimension, of the revealing screen may be less than or equal respectively to the area and / or or the length and / or the width and / or the greatest dimension, of the combined image. In this way, it is possible to simultaneously view the images revealed by all the blocks and the user can immediately compare these revealed images with one another to conclude on the authenticity of the article.
  • the area, the length and / or the width and / or the greatest dimension of the combined image can be respectively less than or equal to the area, the length and / or the width and / or the greatest dimension, of the revelation screen. In this way, it is possible to simultaneously visualize the images revealed by the revelation frame and the user can immediately compare these revealed images with one another to conclude on the authenticity of the article.
  • 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 and at a normal viewing distance, in particular a homogeneous color.
  • the revealed images are preferably observable both from the reveal screen side and from the combined image side.
  • the revealed images have different appearances, in particular different colors and / or shine.
  • 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 images form 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 macro pattern can change appearance when the position of the revealing frame changes relative to the combined image, in particular when moving in one of the directions of the combined image, and / or change in viewing angle.
  • the pattern may change color. This change in appearance can give the impression of movement.
  • the user may have the impression, by changing the position of the revealing frame relative to the combined image, that the color block is moving. from one frame block to another.
  • the macromotective may disappear during a change in the orientation of the revealing frame relative to that of the combined image, in particular when the orientation of the frame becomes different from that of the combined image.
  • the macromotif 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 or each combined image block can be formed of a periodic alternation of pixels of nested images in two directions. non-parallel, in particular separated by an angle of 60 ° or 90 °, preferably perpendicular.
  • a pixel By “pixels”, we understand an elementary pattern.
  • a pixel can be polygonal in shape, including triangle, hexagon, rectangle or square.
  • the revealing frame or each frame block may be formed by periodically alternating blackout frame pixels and non-blackout intervals in the same two directions and with the same periods in both 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.
  • 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.
  • UV ultraviolet
  • IR infrared
  • 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 at least one of the combined image and of the revealing screen can appear on an area of the secure article which is at least partially transparent, the superposition of the revealing screen and of the combined image being effected by folding the l secure article or by superimposition of the secure article with the other object.
  • Each of said at least two blocks can make it possible, 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 revelation frame with respect to the combined image.
  • one of the blocks can 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 revealing frame is moved according to the or one of the directions of the combined image and the revealing frame, in particular perpendicular to the longitudinal axes of the frame lines of the block and of the nested image lines.
  • 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 combined image and / or the reveal screen may be printed with liquid crystal and be worn on an area of the secure article or light polarizing object such that the combined image and / or the screen disclosure is only visible when folding the article on itself or superimposing the secure article with the other object.
  • 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 to the first, the revealing screen superimposed on the image. combined.
  • Each of said at least two blocks 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 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 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 a lumi
  • 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 can 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 in aluminum or copper, or all types of impressions.
  • 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 may 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 disclosure frame 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 revealing 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 revealing screen and / or of the combined image. Two sides of the combined image and / or of the revealing screen can thus be observable directly and not through transparent or translucent zones.
  • the security frame and / or the combined image can be incorporated fully or partially in the window.
  • 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 have a sufficient width to allow the combined image and / or the revealing screen to appear therein in full.
  • 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 can 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 can also be constituted by a polymer layer comprising, for example, polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), polycarbonate (PC), polyester carbonate (PEC), polyethylene terephthalate.
  • PE polyethylene
  • PVC polyvinyl chloride
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PEC polyester carbonate
  • PC polyethylene terephthalate
  • glycol PETG
  • ABS acrylonitrile butadiene styrene
  • collector film light for example of the “waveguide” type, for example a luminescent film based on polycarbonate 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 the use of a particular device.
  • security elements include, for example, colored fibers or planchettes, fully 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 elements may or may not be visible to the naked eye, for example being 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 driver's 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 driver's 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 in order to be able to superimpose it on a second image present on the secure article, the first image being one of the first optical structure and of the second optical structure. and the second image being the other of the first optical structure and the second optical structure
  • 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 screen, a television screen, a mobile phone screen, a book or electronic diary, a personal digital assistant (“Personal Digital Assistant”), digital tablet, a watch face, this list being non-exhaustive.
  • a screen of any known type for example a computer screen, a television screen, a mobile phone screen, a book or electronic diary, a personal digital assistant (“Personal Digital Assistant”), 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 may allow the first image to be projected onto a background or onto 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, mobile 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, mobile 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") type. Diode ”), laser, plasma, electrochromic, FED (“ Field Emission Display ”), 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 ”), SED (“ Surface-conduction Electron-emitter Display ”), LCOS (“ Liquid Crystal On Silicon ”) or even a cathode ray tube.
  • 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 at least partially transparent or translucent zone, 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 can 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 filter polarizing 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 cholesteric liquid crystals is more generally known under the name of “colorshift” effect, the color of cholesteric liquid crystals depending on the angle of observation and these 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 areas and non-polarizing areas. 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 with respect to each other as described above can make it possible to authenticate and / or identify the secure article according to a first security level.
  • 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 relative to one another. the 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 non-polarized 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), able to communicate 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 each other 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), able to communicate 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 each other to obtain said orientation.
  • the secure article may include an integrated microcircuit, for example an RFID chip or an optical chip, able to communicate with the electronic imager so that the latter produces at least a first image whose association with the second image makes it possible to implement 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 can 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, including in particular second different images.
  • the second images are 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.
  • 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 and normal lighting.
  • the combined optical structure (s), the disclosure frame (s), the secure article and the object may be as described above.
  • the first two optical structures have different general orientations.
  • the first revealed images can form a first pattern at the first orientation and the second revealed images form a second pattern at the second orientation, the first pattern not being visible in the second orientation and the second pattern not being visible in the second orientation. first orientation.
  • the superposition of the second first optical structure with the second optical structure forms a Moiré effect and / or in the second orientation, the superposition of the first optical structure with the second optical structure forms a moiré effect. Moiré.
  • the general orientation of the first optical structure is the same as the general orientation of the second optical structure and at the second orientation, the general orientation of the second first optical structure is the same as the general orientation of the second optical structure.
  • the first and second orientation can form an angle ⁇ of between 0 and 180 °, limits excluded, better still between 10 and 30 °.
  • the subject of the invention is also an authentication method defined by claim 12 of a secure article, in which the images revealed by the blocks of the revelation frame (s) and / or of the combined image (s) are observed and one concludes as to the authenticity of the article at least on the basis of this observation.
  • the disclosure frame can be at least partially superimposed on the combined image to observe the images revealed by the different blocks. in folding the secure article and / or superimposing the secure article and the other object and concluding as to the authenticity of the article at least on the basis of this observation.
  • the secure article comprises several revelation frames or several combined images
  • 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 ii 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 the same length, but it may be different.
  • 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 the 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 8A .
  • the combined image I is formed from 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 precise enough for the mixing of the colors to appear homogeneous.
  • the lines of the nested images i 1 to i n have 7 micropatterns, and better still are formed by 7 micropatterns.
  • the 7 micropatts of the ii lines of a nested image can be colored a single color so that the ii lines appear colored, or not.
  • the micropatterns 7 are of the width l of the lines ii of the nested image and of a height of the same order of magnitude so that, in view of the resolution, the lines ii appear of a uniform color at l. eye, the micropatterns 7 not being distinguishable with the naked eye at a distance of 15 cm.
  • the user must use a magnifying glass to view 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
  • 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 "BUTTERFLY" in blue color.
  • 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 brilliance, 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 black opaque 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 opaque 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 widths of the lines of opaque frames 5a and of the lines of transparent frames 5b may or may not be identical.
  • the frame lines 5a and 5b have rectilinear and parallel edges, but it may be otherwise.
  • the revelation screen 4 may include other patterns such as crenellations or undulations, as illustrated respectively in figures 9A and 9B .
  • 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 and 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 opaque 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 opaque 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 which 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 opaque 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 display 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 ii of the visible nested image I i .
  • the opaque 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 opaque raster lines 5a have a width m equal to twice the width of the lines of nested images i 1 to i n .
  • the opaque raster lines 5a when they are well positioned relative to the nested image lines i 1 to i n , cover two nested images, i.e. two colors, and only one nested image, i.e. one color, is visible.
  • the proportion (P 1 ; ...; P n ) of the nested image lines i 1 to i n of the revealed image I r is (0 ; 0; 1).
  • the proportion (P 1 ; ...; P n ) of the nested image lines i 1 to i n of the revealed image I r is (1; 0; 0)
  • the proportion (P 1 ; ...; P n ) of the nested image lines i 1 to i n of the revealed image I r is (0; 1; 0).
  • the lines of nested images i 1 to i n are all of the same width l 1 to l n and the opaque 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 opaque 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 3C , 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 may appear homogeneous to the naked eye.
  • a combined image I in the form of a colored raster formed of an alternation of red, green and blue lines of identical widths l and of a revealing raster of transparent raster line width 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 nested image pixels p 1 to p n in two directions X I and Y I.
  • 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 square, hexagon or rhombus.
  • the pixels of the figure 36A 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 S X and in the direction Y I a period S Y.
  • the directions X I and Y I are perpendicular but it could be otherwise.
  • the directions X I and Y I could form between them a non-zero angle different from 90 °.
  • the nested image pixels 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 screen of revelation 4 is according to the figure 36B . It presents a periodic alternation of opaque 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 opaque raster 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 may 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 pixels of nested images 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 36C to 36E .
  • the opaque 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 of the nested green and red images
  • the revealed image I r is formed by the nested blue and red images
  • the revealed image I r is formed of the nested blue and green images.
  • the various 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 3C and allows 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 O t .
  • 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 opaque raster 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 phase shift distance d ij not zero less than period Q, the phase shift distance d ij 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 frame line i j consecutive 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 show 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 4C to 4E , 6B to 6D and 7B to 7C 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 above.
  • the exposure screen 4 comprises six blocks B 1 to B 6 each forming approximately rectangular 1/6 of a rectangle, as seen in figure 4B .
  • Each of the blocks B 1 to B 6 has a common contour 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 opaque raster lines of block B 1 have a corner 9 in common with the opaque 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 an opaque 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 opaque frame line of block B 1 and the consecutive opaque frame line of block B 2 is equal to five times the width m of an opaque 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 an opaque frame line. It is the same with blocks B 3 and B 4 , and B 5 and B 6 .
  • the width m of the opaque 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 , I r2 and I r5 , and I r3 and I r6 are identical.
  • the revealed images I r1 to I r6 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 4C to 4E 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 opaque raster lines of block B 1 have a region 11 in common with the opaque raster lines of block B 3 .
  • the opaque frame lines of block B 1 are separate from the opaque frame lines of block B 3 .
  • the distance c 12 between the last opaque frame line of block B 1 and the consecutive opaque frame line of block B 2 is equal to twice the width m of an opaque 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 of 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 opaque 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 halves of the width l of a nested image line i 1 to i 4
  • the block B 1 is phase-shifted from the 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 has proportions of nested images (1; 0.25; 1), i.e. an RGB color of approximately (191, 48, 191)
  • the nested image I r2 has 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 6B to 6D 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.
  • Block B 2 represents number 1
  • blocks B 3 and B 4 represent number 0
  • 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 looking at the reveal screen alone shown on the figure 7A , the pattern "100" is not distinguishable at a normal viewing distance, between 30 cm and 10 cm and preferably 15 cm.
  • the opaque 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 6A to 6D .
  • 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 7B to 7C represent images revealed I r1 to I r4 under different observation conditions.
  • At least two blocks B i and B j have opaque screen 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 opaque 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.
  • each nested image I 1 , I 2 , ..., I n forms a pattern, for example as shown in the figure 12A , periodic and the transparent raster lines 5b are of width k equal to the width l of a nested image line.
  • the image revealed by each block B 1 to B g corresponds to one of the nested images and can allow, as illustrated on the figure 12B , the observation of at least one periodic pattern of the revealed nested image.
  • At least two of the blocks B 1 to B g allow the simultaneous observation of two different nested images, in particular of two different periodic patterns. A change in the observation conditions can make it possible to successively observe the different nested images, which can make it possible to give a movement effect when the nested images each represent the decomposition of a movement.
  • the combined image I comprises four nested images I 1 , I 2 , I 3 and I 4 each representing a pattern M 1 , M 2 , M 3 and M 4 , as shown in figure 12A , which repeats periodically along the X axis and along the axes of the nested image lines i 1 , i 2 i 3 and i 4 .
  • the combined image I therefore represents the pattern M, as shown in figure 12A , which repeats periodically along the X axis and along the axes of the nested image lines i 1 , i 2 , i 3 and i 4 .
  • the nested image lines i 1 , i 2 , i 3 and i 4 are discontinuous.
  • the revelation frame 4 of a rectangular shape comprises eight rectangular blocks B 1 to B 8 , the blocks B 1 , B 2 , B 3 and B 4 being out of phase with each other and the block B 1 not being out of phase with respect to the block B 8 , block B 2 not being out of phase with block B 5 , block B 3 not being out of phase with block B 6 and block B 4 not being out of phase with block B 7 .
  • Each of the blocks B 1 to B 8 makes it possible to reveal a nested image, the blocks B 1 to B 8 each making it possible to reveal one of the patterns M 1 , M 2 , M 3 and M 4 .
  • the combined image I illustrated on figure 37A 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 frame has lines of opaque frames 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 have 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 37B to the figures 37C and 37D .
  • 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 images revealed 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 14 .
  • 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 can extend beyond the combined image I and extend over the secure article 10, as illustrated in figure 15 .
  • 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 areas 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 can also include a through window 31, as shown in figure 17D , 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 shown in figure figure 17C . 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. 18 An example of a secure article 10 comprising a perforation 40 in which two sub-elements are placed at least partially, 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 may 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 gloss 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 various blocks B 1 to B g , c ' that is to say that the images revealed 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 21 , to bring the revelation frame 4 back to the combined image I so that their general orientation is the same and observe the revealed image or images 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 includes 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 comprise metallizations and / or demetallizations, for example made of aluminum, and the revealing screen 4 can comprise 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.
  • the article 10 comprises a security thread 60 of sufficient width to alternately display combined images I and revelation frames 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 there is 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 at least partially transparent zone at the level of the combined image I.
  • article10 has two security threads 60a and 60b.
  • the security thread 60a comprises three combined images I and the security thread 60b comprises three disclosure 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 or threads 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, then moving relatively relative to each other. others so as to visualize for example the illusion of movement and / or by modifying the observation angle 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 d 'another object and rotate the combined image I relative to the revealing frames 4a and 4b.
  • the user can also move them with respect to each other along an axis perpendicular X to the general orientation of the combined image to observe a change in the image or images 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 revelation 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 double 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 of substantially square 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 from 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 each other 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 opaque 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 6A to 6D .
  • blocks B 1a to B 17a reveal revealed images I r1a to I r21a forming a central square I r1a surrounded by smaller squares I r2a at 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 L 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 29C and 29D 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 29D and 29G represent images revealed under observation conditions different from those of respective FIGS. 29C and 29F but respectively always with the same orientation of the revealing screens 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 on the background 150 to allow the observation of the revealed image or images 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 32 , be projected, for example in the form of a "W", on 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 as to superimpose 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 immobile, 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 electronic imager 100 can be moved relative to item 10 to move the revealing frame 4 relative to the 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.
  • item 10 includes several different second images 120, as can be seen for example on the figure 16 , 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 allowing the user to be informed on how to position the article 10 shown on the diagram. figure 34 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 to a first image 110a, 110b, 110c or 110d displayed on the screen of the electronic imager 100.
  • the article 10 can include 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 revelation 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 36A .
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Image Processing (AREA)
  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Studio Devices (AREA)
EP16822188.5A 2015-12-29 2016-12-23 Article securise comportant une image combinee et/ou une trame de revelation Active EP3397501B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1563425A FR3046110B1 (fr) 2015-12-29 2015-12-29 Article securise comportant une image combinee et/ou une trame de revelation
PCT/EP2016/082648 WO2017114801A1 (fr) 2015-12-29 2016-12-23 Article securise comportant une image combinee et/ou une trame de revelation

Publications (2)

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EP3397501A1 EP3397501A1 (fr) 2018-11-07
EP3397501B1 true EP3397501B1 (fr) 2020-11-04

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US (1) US10730336B2 (ru)
EP (1) EP3397501B1 (ru)
KR (1) KR20180098397A (ru)
CN (1) CN108883652B (ru)
BR (1) BR112018013384A2 (ru)
FR (1) FR3046110B1 (ru)
RU (1) RU2726715C2 (ru)
WO (1) WO2017114801A1 (ru)

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DE102016123153A1 (de) 2016-11-30 2018-05-30 Helmut-Schmidt-Universität Universität der Bundeswehr Hamburg Vorrichtung und verfahren zur muskelkraftunterstützung
CN112074787B (zh) * 2020-07-16 2022-03-25 香港应用科技研究院有限公司 多层光学安全装置
US11358407B2 (en) 2020-07-16 2022-06-14 Hong Kong Applied Science and Technology Research Institute Company Limited Multilayered optical security device
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
DE102021004132A1 (de) * 2021-08-11 2023-02-16 Giesecke+Devrient Mobile Security Gmbh Sicherheitsmerkmal für einen Datenträger und Datenträger

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Also Published As

Publication number Publication date
KR20180098397A (ko) 2018-09-03
US10730336B2 (en) 2020-08-04
WO2017114801A1 (fr) 2017-07-06
US20190009609A1 (en) 2019-01-10
CN108883652B (zh) 2021-01-05
FR3046110A1 (fr) 2017-06-30
CN108883652A (zh) 2018-11-23
RU2018123343A (ru) 2020-01-31
RU2018123343A3 (ru) 2020-02-17
RU2726715C2 (ru) 2020-07-15
FR3046110B1 (fr) 2022-03-25
BR112018013384A2 (pt) 2018-12-04
EP3397501A1 (fr) 2018-11-07

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