EP2454102A1 - Element de securite a effet de parallaxe - Google Patents
Element de securite a effet de parallaxeInfo
- Publication number
- EP2454102A1 EP2454102A1 EP10740387A EP10740387A EP2454102A1 EP 2454102 A1 EP2454102 A1 EP 2454102A1 EP 10740387 A EP10740387 A EP 10740387A EP 10740387 A EP10740387 A EP 10740387A EP 2454102 A1 EP2454102 A1 EP 2454102A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- security
- revelation
- combined image
- article according
- security article
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
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- 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
- B42D25/342—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
- B42D25/355—Security threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/373—Metallic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/03—Forms or constructions of security seals
- G09F3/0305—Forms or constructions of security seals characterised by the type of seal used
- G09F3/0341—Forms or constructions of security seals characterised by the type of seal used having label sealing means
-
- B42D2033/10—
-
- B42D2035/16—
-
- B42D2035/20—
-
- B42D2035/36—
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0276—Safety features, e.g. colour, prominent part, logo
- G09F2003/0277—Tamper resistant
Definitions
- the present invention relates to the field of security elements used for authentication and / or identification of articles, documents or various objects.
- security elements applied on the surface or introduced in bulk or in windows in a security article, in particular a security article.
- security document, or other object for example a label, packaging, especially for drugs, food, cosmetics, electronic parts or spare parts.
- the security article may in particular be chosen from among a means of payment, such as a bank note, a check or a restaurant ticket, an identity document such as an identity card, a visa, a passport or a driver's license, a lottery ticket, a ticket or a ticket for demonstrations.
- a means of payment such as a bank note, a check or a restaurant ticket
- an identity document such as an identity card, a visa, a passport or a driver's license, a lottery ticket, a ticket or a ticket for demonstrations.
- No. 6,286,873 teaches the possibility of observing coded images on each side of an optical system comprising a revelation frame and a combined image located on either side of a substrate. US 6,286,873 does not disclose a security article.
- US 2007/0279697 discloses a security element having an optical system for producing a moiré effect.
- DE 2006 061905 discloses a security element with a transparent substrate, a plurality of interleaved coded images and a revelation frame superimposed on the coded images, the coded images being observable from two opposite faces of the substrate.
- DE 2006 061905 does not mention the integration in an article of such a security element and the observation of images of the article from two opposite sides of the substrate integrated in the document. article.
- a security article in particular a security document, comprising a security element comprising an optical system, comprising:
- the coded images being observable on the side of the first face and the side of the second face of the substrate.
- the combined image may include at least two nested encoded images.
- it comprises at least three nested coded images in order to accentuate the visual animation effect during successive observations of the images coded by changing the viewing direction of the security element relative to the optical system.
- the revelation of the coded images can be done by parallax effect.
- the invention offers new possibilities to authenticate and / or identify an article or object carrying the security element, for example a security document.
- the user can, by varying the inclination of the optical system, show a succession of images, which can create an animation effect for example.
- the revelation frame may allow the human eye to visualize a different coded image at a time, the observer's brain being able to reconstitute for example a motion or observe hidden information.
- the different images that the observer can see are other than images resulting from a phenomenon of spatial interference between two superimposed networks, in other words a moiré effect.
- a phenomenon of spatial interference between two superimposed networks in other words a moiré effect.
- Such an effect can result from an offset orientation of the superimposed arrays by a non-zero specific angle and can disappear when the arrays are exactly superimposed or are shifted by an angle different from the specific angle.
- the invention preferably seeks to avoid such an effect.
- the transition from observation of one coded image to another when the viewing angle varies can be done without a gradual transition.
- the security element can provide anti-photocopying security.
- the fineness of the revelation screen and / or the combined image especially less than 200 microns, can prevent reproduction by photocopying and also provide protection against the use of scanners.
- the resolution of the combined image and / or the revelation frame can be directly related to the thickness of the substrate. It can be greater than or equal to 800 dpi. preferably greater than 2000 dpi and more preferably greater than 3000 dpi.
- the revelation screen and / or the combined image can be as such of homogeneous appearance to the naked eye, given its fineness.
- the revealing frame may appear to the naked eye as having an appearance, especially a color. uniform.
- the revelation frame and the combined image being present respectively on either side of the substrate, the coded images can be observed in recto-side reflection, which coincides for example with the side of the revelation frame, but also on the back side.
- the security element is integrated in a security document, for example in windows, it may be advantageous to render observable both the front and back sides of the security element.
- the security element may appear in a window of a security article.
- the window may be formed by a lack of material, for example the local absence of paper, above or below the security element, the window being at least partially transparent or translucent on the side of the security element opposite to the lack of material.
- a lack of material for example the local absence of paper
- the window being at least partially transparent or translucent on the side of the security element opposite to the lack of material.
- the window may still not have a lack of material.
- the window may for example be at least partially transparent or translucent on both sides of the security element, the transparent or translucent areas Tune being superposed to each other so as to observe the two opposite sides of] element of security.
- the window can still be through.
- the window may have missing material superimposed on both sides of the security element. Both sides of the security element can thus be observed directly and not through transparent or translucent areas.
- the security element can be incorporated totally in the window or partially.
- the article may still have a plurality of windows as described below.
- the windows may or may not all be of the same type.
- the article may comprise a security element whose opposite sides are visible at the level of the windows, through transparent or translucent areas or directly by the presence of lack of material.
- Examples of embodiment of windows in the security documents are for example described in GB 1 552 853 which discloses the creation of a window in particular by transparency, 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 laser cutting window 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 security article may in particular be a security document comprising paper fibers.
- the invention can notably make it possible to secure security articles, in particular security documents, including paper fibers. such as banknotes or passports, with security features having a relatively small thickness.
- security articles in particular security documents, including paper fibers.
- security documents including paper fibers.
- security features having a relatively small thickness.
- the coded images can represent information hidden and revealed successively by changing the observation angle of the optical system.
- the security element can be configured to allow the observation of the succession of several images when the observation direction changes, which is also called "animation effect".
- animation is to be understood in the broad sense. It can be several images of the same object, representing different angles of view, to provide a 3D effect or relief, rather than a motion effect.
- the combined image may correspond to the decomposition of the movement of a pattern, for example text, alphanumeric signs, ideograms, an object, a person and / or an animal.
- the coded images (also called simply embedded images) may represent successive stages of movement of a pattern, eg an object, person and / or animal.
- the revelation screen may have any contour of shape, for example circular, oval, star-shaped, polygonal, for example rectangular, square, hexagonal, pentagonal or diamond-shaped, among others,
- the outline of the revelation frame may for example represent a text, an alphanumeric sign, an ideogram, an object, a person and / or an animal.
- the combined image and / or the revelation screen may be carried on the substrate by a printing process, for example offset, intaglio, laser, gravure or screen printing.
- the combined image and / or the revelation screen can be printed with colored or non-colored inks, visible under the light, under ultraviolet (UV) and / or infrared (IR), opaque or luminescent, especially fluorescent, thermo-chrome, photochromic, interfering effect!
- the drawn pattern may constitute a magnetic signature allowing additional authentication of the substrate by detecting said signature.
- the combined image and / or the revelation frame may still include metal! isations and / or demetallizations, for example aluminum.
- Metallizations and / or demetallizations may be used to prevent counterfeiting by printing.
- Metallizations and / or demetallizations can still be used when the security element is incorporated in a security article, when the security element is of the security thread type.
- the combined image and / or the revelation screen can be further printed with liquid crystals, so that the coded images are for example visible only through a polariscur.
- the optical system can be carried by a patch and / or a foil.
- the patch and / or the foil may comprise metallizations and / or demetallizations, for example of aluminum, or all types of prints.
- the optical system can still be carried by a security thread incorporated in the surface, mass or window (s) in the security article.
- the width of the security thread is for example between 3 and 20 mm, being for example equal to about 4 mm.
- the substrate of the optical system may comprise or consist of 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 typical waveguide type light-collecting film, for example a film luminescent based on polycarbonate marketed by Bayer under the name LISA *.
- the substrate may comprise cellulosic fibers and in particular paper. In particular, the substrate may be sufficiently translucent paper to allow revealing the coded images, including a tracing paper.
- the substrate may also be transparent by application of a generally fat composition which permanently translates it, for example a composition made of oil and transparent mineral material, as described in US Patent 2,021,141, or for example a composition in the form of a wax combined with a solvent, as described in US Pat. No. 1,479,437.
- a generally fat composition which permanently translates it, for example a composition made of oil and transparent mineral material, as described in US Patent 2,021,141, or for example a composition in the form of a wax combined with a solvent, as described in US Pat. No. 1,479,437.
- the substrate may also be transparent by locally applying a wax by heat transfer as described in US Patent 5,185,526.
- the substrate prefferably uses a fibrous layer comprising a thermofusible material, for example polyethylene, as described in patent EP 0 203 499. which, under the local action of heat, will vary in its transparency.
- a thermofusible material for example polyethylene
- the revelation frame and / or the combined image may each be made with at least two superimposed colors, so that on the reverse side the coded images are observed of a first color and a front side of a second color.
- the revelation screen and / or the combined image may be mono chromatic or polychromatic.
- at least one coded image of the combined image may be monochromatic or polychromatic.
- the nested encoded images may still be made at least in part with thetmocliromic and / or photochromic inks, whereby only part of the encoded images can for example be observable under predefined lighting and / or temperature conditions.
- the combined image and / or the revelation frame can be made with different colors. In this way, it may be possible to obtain a colored animation effect when observing the coded images.
- all nested coded images of the combined image may have the same color and the revelation frame a different color.
- the nested encoded images of the combined image may have different colors and the revelation field may have a different color than the nested encoded or color-like images of at least one of the nested encoded images.
- the revelation frame and / or the combined image may or may not be opaque.
- the exposure screen and / or the combined image may be at least partially translucent or transparent, for example colored or absorbent to a length of given wavelength, in VUV is IR.
- the security element may also comprise two revelation frames associated respectively with two combined images, the orientation of the bands of one of the revelation frames being different from that of the other revelation frame.
- the strips are non-rectilinear, their orientation is defined by the general direction in which they extend.
- the security element may comprise two revealing frames juxtaposed or not, superimposed or not, with bands having different orientations or not.
- One of the revelation frames may be wholly or partially surrounded by the other revelation frame.
- the possible area of superposition of the revelation frames may reveal a grid pattern when the bands of the revelation frames have different orientations.
- the thickness of the substrate is for example between 10 microns and 1 mm. in particular between 6 ⁇ m and 1 mm, preferably between 6 ⁇ m and 300 ⁇ m, preferably between 10 and 100 ⁇ m, being for example between 30 ⁇ m and 50 ⁇ m, It can still be less than 50 microns. especially at 25 ⁇ m.
- the period of the revelation frame and / or the combined image is preferably less than and equal to the thickness of the substrate.
- a security element with a resolution of the combined image and / or the revelation frame greater than or equal to 800 dpi, as well as with a substrate thickness and a period relationship of the revelation frame and / or the combined image and thickness of the substrate such as above can make it possible to obtain an animation visible to the naked eye, despite the fineness of the frame and the combined image, and to reinforce the safety of the device vis-à-vis photocopies and copies thereof.
- the number of interleaved coded images is, for example, between 2 and 15, in particular between 2 and 5, preferably being greater than or equal to 3.
- the distance between two elements constituting the same coded image may be between 2 ⁇ m and 1 mm, especially between 10 microns and 1 mm. preferably being substantially equal to the period of the revelation frame.
- the width of a constituent element of an encoded image is preferably less than or equal to 500 ⁇ rri, better 100 ⁇ rn.
- the width of an opacifying strip of the revealing frame is preferably less than or equal to the thickness of the substrate, especially at 1 mm.
- the revelation screen may comprise opacified bands with parallel edges, possibly non-rectilinear.
- the presence of opacifying tapes with non-rectilinear edges may make it more difficult for the counterfeiter to reproduce the optical system.
- the revelation screen may be printed or made otherwise, in particular by metallization or demetallization. as indicated above.
- the security element may also comprise a revelation frame comprising at least a first fluorescent zone capable of emitting fluorescence, in a predefined lighting condition, a visible light of a first color, and a combined image comprising at least a second fluorescent zone capable of emitting fluorescence, in the predefined lighting condition, a visible light of a second color, different from the first, at least one of the first and second fluorescent zones, in particular both, being at least partially opaque, at least in the predefined illumination condition, and the first and second fluorescent zones overlapping at least partially so that, in the condition predefined lighting, a light passing through the two fluorescent zones successively has a third color different from the first and second colors.
- the security element can use the principle described in the international application WO 2006/051231.
- the predefined lighting condition can in particular correspond to ultraviolet lighting, especially near-visible wavelength or infrared lighting, depending on the fluorescent compounds used. At least one of the first and second fluorescent zones, in particular both, may be substantially colorless in white light.
- the security element may include a plurality of optical systems associated with different observation directions.
- the security element may comprise an alternation of optical systems associated with two respective perpendicular directions, in particular optical systems whose respective revelation frames have perpendicular orientations.
- the security element may be covered entirely or partially of a material invisible under "normal” illumination, that is to say when illuminated by daylight or an artificial light source.
- This invisible material in normal illumination is for example a visible material under a specific illumination, especially a luminescent material, for example a fluorescent or phosphorescent material visible under UV or IR illumination.
- the material may comprise nematic liquid crystals visible on a reflective background (the frame and / or the image and / or the background then being reflective) with a polarizing filter, in particular circular.
- Partial or total coverage of the security element by such material invisible under "normal” illumination can form an additional security in the form of a pattern, for example a word, abbreviation. code, symbol, image, alphanumeric character or ideogram.
- said invisible material in "normal” illumination does not cover the security element but is disposed between the frame and the image, being then observable pa ⁇ iebly but sufficiently.
- the security article may comprise a security element comprising a plurality of optical systems associated with different observation directions, a part of the optical systems being such that the associated coded images are only observable on a first side of the optical system. a security element and another part of the optical systems being such that the associated coded images are observable only on a second side of the security element, opposite to the first.
- the coded images associated with the optical systems can be observed on both sides of the security element.
- the bottom may be disposed alternately on both sides of the security element so that the interleaved images and / or the exposure screen being observable from both the first side of the article and from the second side of the article.
- the security element may thus include the bottom, the latter being located so that the revealing frame is between the bottom and the substrate, or the combined image is between the substrate and the bottom.
- the bottom may still be independent of the security element.
- the user can place the security element or the security article nearby, better in contact with the background, the latter being colored or not.
- the bottom may consist of any substrate, preferably being flattened, for example a sheet of paper or a cardboard.
- the bottom may be arranged such that the user can observe the side of the security element having the exposure screen or the side with the combined image.
- the bottom may comprise at least one luminescent element, for example fluorescent and / or phosphorescent.
- the effect can be observed under predefined lighting, for example UV or IR.
- the bottom may still include a layer of metal.
- the contrast effect can also be achieved without the presence of the background, including the simple fact of using a light source when the security element is observed in transvision on the side of the combined image or on the side of the image.
- the revelation plot Indeed, the light source can play the same role as a colored background and allow the appearance of a contrast effect by the combination of the different colors of the light source, the combined image and the image frame. revelation.
- the combined image and the revelation frame may have the same color. and the background may be different in color, especially being more contrasted.
- the security article may also include a perforation in which is placed at least partially the security element, the latter corresponding for example to the juxtaposition of two sub-elements, particularly in the form of faiths or patches. respectively comprising a revelation frame and the corresponding combined image.
- the sub-elements may at least partially cover the edges of the perforation, with or without thickness compensation.
- the security article may further comprise a revelation frame or a combined image made in the form of prints and a sub-element, in particular in the form of a foil or patch, at least partially covering the impressions formed, the sub-element comprising the combined image or the corresponding revelation frame.
- the prints of the combined image may for example be made on the surface of the security article.
- the or each sub-element may comprise a transparent or translucent substrate.
- each sub-element in particular the patch or the foil, may be incorporated into the security article by gluing or by incorporation into the fibrous substrate of the article during its manufacture.
- the optical system may comprise at least two combined images and a single frame allowing, during a change of the observation angle, to successively observe the nested images of the two combined images.
- the two combined images can be arranged in such a way that a relative movement of an image combined with the other is perceived by a user upon a change in the viewing direction of the security element relative to the optical system.
- the substrate may comprise at least two distinct layers and the optical system may comprise at least two combined images, one of them being arranged facing one another, in particular on one external face of one of the layers of the substrate and the other combined image being disposed between the two layers.
- the two layers of the substrate may have the same thickness. These two layers can be transparent.
- Each combined image may comprise a plurality of nested encoded images.
- Each combined image may comprise the same number of coded images and / or each combined image may have the same resolution, in particular one of the resolution values mentioned above and / or the distance between two elements constituting the same coded image of the first combined image may be equal to the distance between two constituent elements of the same coded image of the second combined image.
- the invention further relates, in another of its aspects, to a method of manufacturing a security article as defined above, the frame being formed by printing the article or while the substrate of the security element is present on the article.
- UD another aspect of the invention is a security article in which the revelation frame, or preferably one or more coded images (coded image or original image before coding), is produced with a pattern, for example corrugated opacifying bands, and the same pattern is made elsewhere on the article.
- the subject of the invention is also a method for authenticating a security article, comprising the step of observing the security article by varying the observation direction of the optical system and concluding on the authenticity of the security article.
- the article or object associated with the security article based on the observed images.
- the observation can for example be done front and back sides of the substrate.
- the article or object, or the safety element such as a wire, patch or security foil may include one or more security features, as defined below -after.
- security features are detectable to the naked eye. in daylight or artificial light, without the use of a particular device.
- These security elements comprise for example colored fibers or boards, fully or partially printed or metallized wires. These security elements are called 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 comprise, for example, fibers, boards, strips, wires or particles. These security features may be visible to the naked eye or not. being for example luminescent under a lighting of a Wood lamp emitting in a wavelength of 365 nm. These security elements are said to be second level.
- security elements still require for their detection a more sophisticated detection device.
- These security elements are for example capable of generating a specific signal when they are submitted, simultaneously or not. to one or more sources of external excitation. The automatic detection of the signal makes it possible to authenticate, if necessary, the article.
- These security elements comprise, 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.
- Security features within the security article may have first, second, and / or third level security features.
- Another aspect of the invention is a security element comprising an optical system comprising:
- a first and a second combined image each comprising a plurality of interleaved coded images
- first revelation frame makes it possible to observe the coded images associated with the first image combined in a first plane at a first change of the observation direction of the security element relative to the optical system
- second revelation frame for observing the coded images associated with the second combined image in a second plane at a second change in the viewing direction of the security element relative to the optical system
- the combined images may be located on the side of a first face of the substrate.
- the two revelation fields may be located on the side of a second face of the substrate, opposite to the first.
- the two revelation frames may alternatively be located on the side of the first face of the substrate, the security element then having on the side of a second face of the substrate, opposite the first, a reflective surface for observing the images. encoded through the revelation frames, the bands of the two revelation frames having a different orientation.
- the invention further relates, in another of its aspects, to a security article comprising a security element as defined above.
- the superposition of revelation frames can reveal a grid pattern.
- the two revelation fields and / or the two combined images can be produced as described above.
- the revealing frames may comprise strips with parallel edges, possibly non-rectilinear, for example corrugated.
- the revelation frames and / or the combined images may be printed or made differently, in particular by melting or demetallization.
- the revelation frames and / or the combined images may be made by metal etching or not.
- the revelation frames and / or the combined images may be made with different metals or not.
- the bands of the revelation frames may be perpendicular or not to each other.
- the pitch of the bands of the revelation frames may be identical or not.
- the revelation frames and / or the combined images can be produced with goniochromatic inks. In this way, it may be possible to create visual effects to see in the same region from two different angles, images encoded with different colors.
- the revelation frames and / or the combined images may further comprise photochromic and / or thermochromic inks.
- a revelation frame and / or a combined image may always be visible and the other revelation frame and / or combined image may only be visible under predefined lighting and / or temperature conditions.
- the revelation frames and / or the combined images may be partially or totally realized with thermochromic and / or photochromic inks to allow observation of zones of the revelation frames and / or the combined images only in lighting conditions and / or or preset temperature.
- the bands of the revelation frames may have a regular pitch, different or not.
- One of the revelation frames and / or one of the combined images may for example be formed on a part of a security article different from the part where the other revelation frame and / or combined image is located, the superposition of the two frames revelations and / or combined images that can be made by folding the article, including security document.
- the revelation frames and / or the combined images may or may not be located in the same plane.
- the revelation frames may be located in two different planes and the combined images may also be located in two other different planes.
- the revelation frames, respectively the combined images can still be located in the same plane, and the combined images, respectively the revelation frames, can be located in two other different planes.
- One of the revelation frames, respectively the combined images, may be observable through a first polarizer. and the other revelation frame, respectively the other combined image, can be observable through a second polarizer.
- the use of polarizers is associated with revelation frames and / or combined images comprising liquid crystals.
- the person skilled in the art will choose in particular a structure adapted to the desired effect, in particular according to whether he wishes to observe the coded images, during a change in the observation direction of the security element relative to the optical system, on one or both sides of the security element.
- the coded images observable with one of the revelation frames may or may not be identical to the coded images observable with the other frame.
- the observation of identical images can provide additional security against an attempt to falsify.
- the frames of revelations can be superimposed totally or partially.
- FIG. 1 is a diagrammatic sectional view of an example of an optical system produced according to an embodiment of the invention
- FIG. 2 represents, in front view, on an enlarged scale, an exemplary revealing frame
- FIG. 3 illustrates the decomposition of the combined image into coded images.
- FIG. 4 illustrates the formation of an encoded image
- FIG. 5 represents a succession of coded images such that it can be observed when the observation angle varies
- FIGS. 6A to 6H show other examples of revelation frames.
- FIG. 7 is a view similar to FIG. 1, of an alternative embodiment of an optical system
- FIG. 9 represents a security element comprising several optical systems corresponding to different respective viewing directions
- FIGS. 10 and 11 represent two examples of security documents according to the invention
- FIGS. 12A, 12B, 12C and 12D represent examples of security documents according to the invention.
- FIGS. 13A and 13B show an example of a security document according to the invention, respectively after photocopying and before photocopying.
- FIGS. 14 to 16 illustrate variants of observation of security elements
- FIG. 17 illustrates an alternative embodiment of the revelation frame and the combined image
- FIGS. 18 and 19 illustrate alternative embodiments of security articles according to the invention.
- FIG. 1 shows a security element 1 that can be incorporated in a security article according to the invention, which comprises a non-opaque substrate 2, for example perfectly transparent, having a first face 2a carrying a plurality of coded images I [, I 2, I 1 ...., nested, the building element 3 of these images Ia eg in the form of continuous or broken lines, usually discontinuous.
- the set of coded images Ij, .... I n form a combined image I, as can be seen in FIG.
- the second face 2b of the substrate 2, opposite to the first, carries a revealing frame 4 (also called decomposition filter) comprising opacifying strips 5
- the revelation screen 4 is composed of a periodic pattern, in this case the opacifying band 5, of constant period p, as can be seen in FIG. 2.
- the periodicity is observed parallel to the direction of the relative displacement X between the optical system and the observer to observe the different coded images.
- the simplest embodiment of the revealing frame 4 is a succession of opacifying strips 5 of constant width at regular intervals, as illustrated in FIG.
- the period p is the sum of the width of an opacifying band 5 and a transparent interval between two consecutive opacifying bands 5.
- each of the opacifying strips 5 is oriented perpendicularly to the relative displacement axis X.
- the revelation screen 4 may comprise other patterns than strips of constant width with straight and parallel edges, such as crenellations or corrugations, as shown in FIGS. 6A and 6B, respectively.
- N is the total number of coded images
- N (p / w).
- the transparent intervals 8 of the revelation frame 4 may allow, if desired, to reveal a single image at a time.
- a coded image then corresponds to the portions of the combined image present in the transparent gaps of the frame for a given viewing angle.
- Each coded picture can be visible by shifting the observation of the width of a transparent interval 8.
- Is illustrated in Figure 3 an example of forming a combined image I by summing a plurality of coded pictures, for example four coded images Ii to I 4.
- FIG. 4 illustrates the production of an encoded image I 1 from an original image J at which the image of the revelation frame 4 is subtracted.
- FIG. 5 shows the appearance of the different images Ii to I 4 , when the angle of observation ⁇ represented in FIG. 1, relative to the optical system, changes.
- the animation corresponding to the coded images can be revealed in reflection, revealing frame side and combined image side.
- the period p is preferably less than or equal to approximately the thickness e of the substrate, as shown in FIG.
- a safety wire generally has a maximum thickness of 50 microns, which corresponds to a frame of less than or equal to 50 microns period.
- the lines 3 composing the nested images will generally have a width of less than or equal to 12.5 ⁇ m.
- the system making it possible to form the combined image then has a minimum resolution of (2.54 ⁇ 10 -3 ) / (12.5 ⁇ 6 -6 ), that is to say 2032 dots per inch (dpi or dpi).
- the weft can then be in the form of a series of lines of 3 ⁇ 12.5 ⁇ 37.5 ⁇ m in width and separated by a distance of 12.5 ⁇ m.
- the period p of the frame is less than 100 microns and the constituent elements in the form of three component features the coded images are less than 33 .mu.m, in case of three images by animation.
- a width of 12.5 ⁇ m corresponds to about 2000 dpi, which is a limit for conventional printers that generally have a maximum definition of 600 dpi, or 1200 dpi. which constitutes a factor of security, in particular of anti-copy or anti-photocopying security.
- a substrate whose thickness e is less than or equal to 30 ⁇ m, more preferably 25 ⁇ m, for example between 20 and 30 ⁇ m, or even 20 and 25 ⁇ m. terminals included or excluded.
- a sufficiently fine revelation frame makes it possible to provide anti-photocopying security and the existence of several coded images having details to be displayed according to different observation directions also creates a protection against the use of scanners. Moreover, the human eye does not perceive details less than approximately 200 ⁇ m. a sufficiently fine revelation screen appears of homogeneous appearance, for example gray when using black opacifying strips. Despite the fineness of the revelation frame, the animation can be preserved, with coded images of scale greater than one millimeter, which contrast with the homogeneous appearance of the frame.
- the nested images can be successively visible during a loading of the viewing angle.
- Resolutions over 2000 dpi, or 3000 dpi, can help secure the device.
- the print definition may be accurate enough that the color mixing appears as homogeneous.
- FIG. 13A and 13B there is illustrated in Figures 13A and 13B. greatly enlarged, an exemplary security document 10 according to the invention comprising a plurality of security elements 1.
- Fig. 13A shows the observation of the security document SO after photocopying
- Fig. 13B shows the observation of the document before photocopying.
- the invention provides a high anti-photocopy security.
- the revelation screen may be fine enough to provide a consistent coloring effect upon viewing, contrary to what is seen in Figure 13B which is greatly enlarged. Since the optical system can operate in transmitted or reflected light, it can be used for windows or wires introduced into windows, for example in a banknote.
- the combined image I and / or the revelation screen 4 may be formed by printing, demetallization, laser marking, lithography or any other technique for fixing or displaying an image.
- liquid crystal inks may be used, for example to print the combined image I.
- the animation to be revealed may then require in addition to the frame decomposition, the use of a filter polarizer. which may be present on the document or the substrate, or not.
- the combined image I can be obtained by micro-photolithography of the wire and the revelation screen 4 can be achieved by means of offset printing. UV performed in a second step, when printing the document.
- the revelation frame 4 may be associated, where appropriate, with a printing design of the document.
- the pattern of the revelation screen 4 may be printed elsewhere than in superposition with the combined image, on the document, on the same scale or on a different scale.
- the printing of the revealing frame 4 may overflow the security element 1 and extend over the security document 10, as illustrated in FIG. 10.
- This double coloration can be achieved by demetallization or photolithography, for example.
- the revealing frame 4 comprises superimposed opacifying strips 5a and 5b respectively of a first color Ci and a second color C 2 , the opacifying strips 5a of color Ci being external.
- the elements 3 of the combined image I are respectively printed with the two colors Cj and Co superimposed, the color elements C 2 being external.
- the order of color superposition can be the same on each side of the substrate 2.
- One possibility for varying the observation direction of the optical system may be to deform the substrate, for example around a folding axis, as illustrated in FIG. 8.
- optical systems for example having the shape of small squares or rectangles of a few millimeters of sides, may be present on the same security thread 20, as shown in Figures 9 and 11.
- the security element is a window integrated wire (s), as shown in Figures 12A and 12B.
- the document 10 may comprise at least two windows 31 and 32 for respectively observing each of the faces of the wire, in reflection.
- Lc substrate paper may comprise at the windows 31 and 32 of the lack of material and transparent areas 35 and 36 allowing the observation of coded images on both sides of the security document.
- the coded images are observable through the revealing frame 4 on the side of the window 31 and with the revealing frame as background, on the side of the window 32.
- the document 10 may also include a through window 31, as shown in FIG. 12D, the security element 1 being located at least partially in this through window. In this way, it is possible to observe the coded images on both the front and back sides of the security document 10.
- the security element 1 in the form of a security thread can still be incorporated in a security document 10 which has an alternation of front and back side windows 31 and 32, as illustrated in FIG. 12C. It is thus possible to observe the coded images of both the front side and the back side of the security document 10 at the level of the windows 31 and 32, and in particular because of the presence of the material gaps and the transparent areas 35 and 36.
- FIGS. 14 and 16 illustrate variants of observation of safety elements I that can be incorporated into a security article according to the invention. For the sake of simplicity, the security article was not represented.
- the observation of the security element 1 can be done through the use of a bottom 30 on which the article comprising the security element 1 would be placed.
- the face 2b of the security element 1 comprising the revealing frame 4 may be in contact with the bottom 30, as illustrated in FIG. 14.
- the face 2a of the security element J comprising the combined image I may be in contact with the bottom 30. as illustrated in FIG.
- the revelation screen 4 is black in color
- the combined image 1 is red in color
- the background 30 is green in color.
- the user can thus observe a revealing frame 4 of black color and a spiral of red color in contrast with the black color of the revealing frame and the green color of the background.
- the user can thus observe a revealing frame appearing as a mixture of red and black, the red color of the coded images being able to be formed by pixels, and a spiral of red color in contrast. with the green color of the background and the mixture of black and red colors of the revelation frame.
- the contrast effect obtained can also result from the simple observation in transvision of the security element] near a light source 31, for example sunlight, as illustrated in FIG.
- FIG. 17 shows an alternative embodiment of a revelation screen 4 and a combined image I that can be used in a security element 1 of a security article 10 according to the invention.
- this exemplary embodiment illustrates the possibility of producing a revelation frame 4 and a combined image I so that the coded images can be observable in the two main directions of inclination of the security element 1, especially in the sense of width and length.
- the revelation frame 4 can thus result from the superimposition of two frames
- the combined image I may result from the superposition of combined images Ia and Ib which correspond to combined images associated with frames 4a and 4b.
- the animation effect obtained can thus be observed in at least two directions of inclination of the security element 1.
- FIG. 18 There is shown in FIG. 18 an example of a security article 10 comprising a perforation 40 in which at least two sub-elements are placed at least partially. in particular in the form of foils or patches, 41 and 42 to form a security element 1 according to the invention.
- 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 borders of the perforation 40 with or without a thickness compensation.
- Sub-elements 41 and 42 may be at least partially transparent or translucent.
- Observation of the coded images can be done by observation in reflection or in transvision, for example using a light source located behind the article during the observation.
- the security article 10 comprises a combined image I made in the form of prints.
- the impressions are for example made on the surface of the security article 10.
- a sub-element, in particular in the form of a foil or patch, 43 is placed on the 1 S impressions constituting the combined image ⁇ , the sub-element 43 comprising the corresponding revealing frame 4, for example made on the surface of the sub-element 43.
- the security article 10 may be opaque or not.
- the security article 10 may be at least partially transparent or translucent to allow the observation of the coded images, in particular on the side of the combined image I.
- the security element 1 differs from that of FIG. 1 in that it comprises two non-opaque, for example perfectly transparent, substrate layers 2 and two combined I and F images.
- two substrate layers here have the same thickness, for example 25 ⁇ rn.
- the first combined image 1 is arranged opposite the face 2b of the security element and represents for example a pattern such as a cloud.
- the second combined image I ' is disposed between the two substrate layers 2 and represents in the example in question a pattern such as a horse.
- the period p of the revelation frame is in the example considered equal to the thickness of a substrate layer, that is to say to 25 microns.
- the nested images I 1 and V 1 forming respectively the first and the second combined image are in the example of FIG. 20 arranged in the same way so that during a change of observation angle from the face 2a of the security element, the pattern represented by the second combined image F will move twice as slowly as the pattern represented by the first combined image 1 since only half as many nested images F 1 as nested images I 1 will have been visualized by the eye.
- This example highlight the possibility with the invention to obtain a motion effect between the patterns shown in the nested images.
- Such an effect, which can still be described as "effect of depth" is for example similar to that provided by the "differential scrolling" of the first video games.
- the example of FIG. 20 can be obtained by assembling, in particular by bonding, different substrate layers 2.
- the example of FIG. Figure 20 is obtained from a laser-markable monolayer substrate in which at least the combined image is formed in the substrate by exposure to laser radiation.
- the combined image F and / or the revelation screen are in particular printed or labeled by laser irradiation.
- the use of the laser makes it possible to mark said laser-marked substrate at the desired depth, and also to mark said substrate at at least two different depths (thicknesses), for example to form in a single-layer substrate at least two of the elements of the revelation frame and the combined images.
- the invention is not limited to the illustrated examples.
- the security element can be realized with other first, second or third level security, for example.
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Abstract
Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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SI201030740T SI2454102T1 (sl) | 2009-07-17 | 2010-07-19 | Varnostni element s paralaksnim učinkom |
PL10740387.5T PL2454102T5 (pl) | 2009-07-17 | 2010-07-19 | Element zabezpieczający z efektem paralaksy |
Applications Claiming Priority (2)
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FR0955003A FR2948218B1 (fr) | 2009-07-17 | 2009-07-17 | Element de securite a effet de parallaxe |
PCT/IB2010/053286 WO2011007344A1 (fr) | 2009-07-17 | 2010-07-19 | Element de securite a effet de parallaxe |
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EP2454102A1 true EP2454102A1 (fr) | 2012-05-23 |
EP2454102B1 EP2454102B1 (fr) | 2014-06-25 |
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US (1) | US20120174447A1 (fr) |
EP (1) | EP2454102B2 (fr) |
BR (1) | BR112012000899B1 (fr) |
CA (1) | CA2768203C (fr) |
ES (1) | ES2499466T5 (fr) |
FR (1) | FR2948218B1 (fr) |
HK (1) | HK1171207A1 (fr) |
PL (1) | PL2454102T5 (fr) |
SI (1) | SI2454102T1 (fr) |
WO (1) | WO2011007344A1 (fr) |
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WO2018115515A1 (fr) | 2016-12-23 | 2018-06-28 | Oberthur Fiduciaire Sas | Document securise |
WO2022189584A1 (fr) | 2021-03-12 | 2022-09-15 | Oberthur Fiduciaire Sas | Article de sécurité ou ensemble d'un article de sécurité et d'un autre objet comportant une première et une deuxième trame |
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EP1473107A1 (fr) | 2003-05-02 | 2004-11-03 | Kba-Giori S.A. | Dispositif et méthode pour découper des ouvertures dans un substrat |
AT501320B1 (de) † | 2003-09-17 | 2008-10-15 | Hueck Folien Gmbh | Passives aktivierbares sicherheitsmerkmal |
EP1527901B1 (fr) † | 2003-10-28 | 2007-03-07 | Alcan Technology & Management Ltd. | Emballage infalsifiable avec élément de sécurité |
ES2505118T3 (es) | 2003-11-21 | 2014-10-09 | Visual Physics, Llc | Sistema de presentación de imágenes y de seguridad micro-óptico |
DE10358784A1 (de) * | 2003-12-12 | 2005-07-14 | Giesecke & Devrient Gmbh | Datenträger mit mittels Laserstrahl eingeschriebenen Kennzeichnungen und Verfahren zu seiner Herstellung |
US20050150964A1 (en) | 2004-01-14 | 2005-07-14 | Lo Allen K. | Counterfeit proof label having optically-concealed cross reference color codes and apparatus for making same |
AT501989B1 (de) † | 2004-03-26 | 2010-04-15 | Hueck Folien Gmbh | Sicherheitsmerkmal mit unter einem bestimmten betrachtungswinkel optisch erkennbaren merkmalen |
FR2877609B1 (fr) | 2004-11-08 | 2007-03-09 | Arjowiggins Security Soc Par A | Structure de securite et article incorporant une telle structure |
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DE102005039113A1 (de) | 2005-08-18 | 2007-02-22 | Zintzmeyer, Jörg | Mikro-Refraktionsbild |
NL1030245C1 (nl) * | 2005-10-21 | 2007-04-24 | Joh Enschede Security Solution | Visueel authenticiteitskenmerk en substraat voorzien van een dergelijk kenmerk. |
EP1845496A1 (fr) * | 2006-04-12 | 2007-10-17 | Trüb AG | Elément de sécurité pour un support de données, support de données pourvu d'un tel élément de sécurité, semi-produit destiné à la fabrication d'un support de données tout comme procédé destiné à la fabrication d'un support de données |
FR2901813B1 (fr) | 2006-06-06 | 2011-02-18 | Arjowiggins Security | Materiau en feuille comportant une fenetre, son procede de fabrication, et document de securite le comprenant |
DE102006037377A1 (de) † | 2006-08-09 | 2008-02-14 | Huhtamaki Ronsberg, Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg | Bedrucktes Verpackungsmaterial, insbesondere Verbundfolie für Verpackungen |
DE102006061905A1 (de) * | 2006-12-28 | 2008-07-03 | Zintzmeyer, Jörg | Sicherheitselement |
EP2123470A1 (fr) † | 2008-05-20 | 2009-11-25 | Gemalto Oy | Élément de sécurité variable optiquement et document d'identification associé à l'élément |
-
2009
- 2009-07-17 FR FR0955003A patent/FR2948218B1/fr active Active
-
2010
- 2010-07-19 SI SI201030740T patent/SI2454102T1/sl unknown
- 2010-07-19 US US13/384,561 patent/US20120174447A1/en not_active Abandoned
- 2010-07-19 ES ES10740387T patent/ES2499466T5/es active Active
- 2010-07-19 WO PCT/IB2010/053286 patent/WO2011007344A1/fr active Application Filing
- 2010-07-19 CA CA2768203A patent/CA2768203C/fr active Active
- 2010-07-19 EP EP10740387.5A patent/EP2454102B2/fr active Active
- 2010-07-19 BR BR112012000899A patent/BR112012000899B1/pt not_active IP Right Cessation
- 2010-07-19 PL PL10740387.5T patent/PL2454102T5/pl unknown
-
2012
- 2012-11-22 HK HK12111995.8A patent/HK1171207A1/xx not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO2011007344A1 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018115515A1 (fr) | 2016-12-23 | 2018-06-28 | Oberthur Fiduciaire Sas | Document securise |
WO2022189584A1 (fr) | 2021-03-12 | 2022-09-15 | 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 |
FR3120567A1 (fr) | 2021-03-12 | 2022-09-16 | 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 |
Also Published As
Publication number | Publication date |
---|---|
EP2454102B1 (fr) | 2014-06-25 |
WO2011007344A1 (fr) | 2011-01-20 |
FR2948218A1 (fr) | 2011-01-21 |
ES2499466T3 (es) | 2014-09-29 |
FR2948218B1 (fr) | 2011-11-11 |
US20120174447A1 (en) | 2012-07-12 |
BR112012000899A2 (pt) | 2016-11-16 |
CA2768203A1 (fr) | 2011-01-20 |
PL2454102T3 (pl) | 2014-11-28 |
SI2454102T1 (sl) | 2014-10-30 |
HK1171207A1 (en) | 2013-03-22 |
PL2454102T5 (pl) | 2024-02-05 |
CA2768203C (fr) | 2018-08-07 |
ES2499466T5 (es) | 2023-06-14 |
EP2454102B2 (fr) | 2023-03-01 |
BR112012000899B1 (pt) | 2019-12-17 |
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