EP2637875B1 - Optically variable security device for a valuable document - Google Patents
Optically variable security device for a valuable document Download PDFInfo
- Publication number
- EP2637875B1 EP2637875B1 EP11779701.9A EP11779701A EP2637875B1 EP 2637875 B1 EP2637875 B1 EP 2637875B1 EP 11779701 A EP11779701 A EP 11779701A EP 2637875 B1 EP2637875 B1 EP 2637875B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- image
- relief
- component
- zones
- observation
- 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.)
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Links
- 230000003287 optical effect Effects 0.000 claims description 81
- 230000000694 effects Effects 0.000 claims description 24
- 230000009471 action Effects 0.000 claims description 10
- 238000004049 embossing Methods 0.000 claims description 7
- 230000000295 complement effect Effects 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 2
- 239000011888 foil Substances 0.000 claims 1
- 238000007639 printing Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 238000005286 illumination Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009304 pastoral farming Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000002211 ultraviolet spectrum Methods 0.000 description 1
Images
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
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/425—Marking by deformation, e.g. embossing
-
- B42D2035/24—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/29—Securities; Bank notes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—Diffraction gratings; Holograms
Definitions
- the present invention relates to the technical field of security elements for securities documents, such as fiduciary documents or similar.
- “fiduciary document” means all documents such as banknotes, checks, bank cards, used to transmit a sum of money.
- “Assimilated document” means any document issued by an administration of the State to prove the identity of a person, his rights to drive a vehicle, such as in particular the identity card, the passport, driving license, etc. By this expression is also meant any document used to authenticate an object of value such as for example a label affixed to a luxury garment. We also hear any document used to authenticate the payment of a tax such as tax stamps.
- such a security component produces an optical effect consisting of one or more optical animations, such as contrast sets, color changes, optical illusions, and so on.
- an optical security component comprising a film embossed with a first zone producing a rainbow effect according to a first orientation of the component relative to a lighting direction, and a second area producing a color effect of a first color in a first orientation of the component and a second color different for an orientation perpendicular to this first orientation.
- the complexity of making such a component generally lies in a combination of various printing techniques that are difficult to reproduce with consumer copying equipment (scanner, laser or color inkjet printers, etc.) and / or standard printing equipment.
- EP 1,902,855 discloses a security document comprising a leaf area with a first region of a first color and a second region of a second color. Under these, see beyond these extends a security means such as a hologram. Thus, the hologram is partially visible through the first and second regions of different colors.
- WO 2008/154541 refers to an authentication product such as a label.
- a first part of this product has a intaglio printing inked with a latent image, while the second consists of a hologram.
- US 6,088,161 is relative to a support having a surface with diffractive submicron relief structures. This consists of a series of parallel but non-contiguous nets. The diffraction effect is homogeneous in each net but different on contiguous nets.
- WO 95/23350 describes a diffractive surface with elements of shiny appearance that "turn on” in turn depending on the orientation of the observation. These elements are included in a hologram.
- the object of the present invention is to provide a security device, for example of the first level, improving the properties of components already known while being very difficult to reproduce to ensure a great difficulty of counterfeiting.
- the subject of the invention is in particular a document-value security device comprising a medium and, on the latter, a security component comprising at least first and second regions respectively producing first and second optical effects each having at least two characteristic aspects according to distinct observation configurations of the component, and which comprises an at least partially raised image obtained by deformation of said component and said support on which said component is affixed, this image comprising at least a first and a second graphic element, an image that extends at least partially in the two zones and that at least said first and second graphic elements of the image are revealed respectively in the first and second areas with the appearance of at least one of the two aspects respectively of the first and second optical effects, characterized in that the image is configured so that the first element is concealed with the appearance of the other of the two aspects respectively of first and second optical effects, and that the second element is concealed with the appearance of the other of the two aspects respectively of the first and second optical effects, so that in the same configuration of said observation configurations, the first graphic element is revealed and the second graphic element is concealed and vice versa, that
- the image acts in synergy with the generated optical effects to produce a play of shadow and light, or even of colors, by concentrating, scattering or diffracting light from a light source.
- the invention proposes to take advantage of the light variations obtained to scramble, reveal partially or entirely security information according to different configurations of observation of the component.
- one of the optical effects is preferentially combined with one of the parts of the image to produce an ignition or extinguishing effect of the part concerned.
- the image is configured so that the first and second elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.
- the appearance of a first aspect related to one of the optical effects allows the revelation of one of the graphic elements while the appearance of a second aspect allows its disappearance or dissimulation.
- change of observation configuration it is then possible to reveal or hide information contained for example in the graphic element in question.
- the first graphic element is revealed and the second graphic element is concealed and vice versa, that is to say that another same configuration of said observation configurations, the second graphic element is revealed and the first graphic element is hidden.
- the information contained in the graphic elements can thus be partially revealed in the same observation configuration.
- the relief is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency, etc.
- the depth of relief is between 5 and 150 micrometers and the relief is achieved by deformation of the support (embossing).
- the invention also relates to a document-value, such as a bank note comprising a security device according to the invention.
- the document-value 10 is a banknote.
- the document 10 may be a passport, a driver's license or any other document that may require security.
- the document 10 comprises a support 12, made of a material comprising for example essentially paper, plastic or a mixture of both.
- a support 12 made of a material comprising for example essentially paper, plastic or a mixture of both.
- the material of the support may also have a multilayer structure, where appropriate comprise several layers laminated together.
- the document 10 also includes a safety component 16 according to a first embodiment of the invention.
- the component 16 according to this first embodiment is illustrated in detail on the Figures 2A and 2B .
- the security component 16 comprises first Z1 and second Z2 zones respectively producing first and second optical effects.
- the first and second optical effects are each capable of presenting at least two characteristic aspects according to distinct observation configurations of the component 16. In the example illustrated, the two aspects are well differentiated which allows an observer to distinguish them easily.
- an observation configuration is defined by a set of observation parameters such as, for example, an orientation of the component 16 with respect to an observation direction, a relative position of a light source, the source size, the emission wavelengths of the source, its transmission power, etc.
- the first effect for example has a first aspect according to first and second observation configurations ( Figure 2A ) and a second aspect according to a third observation configuration ( Figure 2B ) .
- the first and second configurations respectively correspond to observation directions 24A, 24B angularly separated by a quarter of a turn, for example inclined at an angle of 45 ° relative to the plane comprising the component 16.
- the third configuration corresponds to a shading observation schematized by reference 24C.
- the optical effects vary in particular according to predefined orientations of the component 16 relative to a light source S diagrammatically represented in the figures by a sun and more precisely with respect to a direction of illumination (no indicated in the figures).
- the light source S can emit a directional or diffuse beam.
- the invention is not limited thereto, it is particularly well suited to be used with a diffuse visible (eg white) polychromatic light illuminating the security component.
- the light source S may comprise a spectrum of wavelength outside the visible range (conventionally defined between 0.4 and 0.7 micrometers), for example in the ultraviolet spectrum of length spectrum. wave less than 0.4 micrometers or the infrared range of wavelength spectrum beyond 0.7 micrometers. In this case, it is usually necessary to use a specific detector to observe the optical security.
- the optical effects each act in at least one preferred direction, the orientation of which depends for example on the main illumination direction of the source S.
- the first optical effect associated with the zone Z1 is generated by a diffractive grating producing at least a first rainbow characteristic appearance according to at least one observation direction grazing 24C ( Figure 2B ) and at least one second non-diffractive appearance, for example dull gray, in at least one other direction of observation, for example in the direction 24A or 24B ( Figure 2A ).
- the first optical effect has at least one preferred direction of action which is linked, in the case of a diffractive grating, notably to the direction of a diffraction order of this grating.
- the observation direction 24C is determined in this example, in particular by the lighting direction of the component 16 and for example coincides substantially with a direction of a diffraction order of the grating.
- the diffractive grating preferably has at least one preferred direction of diffraction which determines the observation direction 24A and 24B of the rainbow aspect of the first effect.
- This diffraction direction is itself defined for example with respect to the reference illumination direction of the source S.
- a diffractive grating is generally formed by a regular arrangement of identical diffracting elements. Each of the elements diffracts the incident light in all directions and each diffracted beam in one direction interferes with the other diffracting beams in the same direction.
- the network makes it possible to produce a chromatic dispersion at the origin of the rainbow appearance observable according to at least one observation direction.
- the network comprises a plurality of lines extending in a longitudinal direction which determines the preferred direction of diffraction.
- the second effect associated with zone Z2 produces a first color appearance of a first observable color according to one of the configurations and a second color aspect of a second observable color according to the other of the configurations.
- the first color is green and the second color is red.
- the second optical effect associated with the second zone Z2 is generated by a diffraction color subtraction filter.
- This second optical effect is produced, for example, by a diffraction grating structure having predefined network parameters so that the diffractive structure is configured to separate an incident polychromatic light into at least one pair of angularly separate adjacent reflected beams and contrasting colors.
- the diffractive grating preferably has two preferred directions of action corresponding to each of the contrasting colors.
- the red and green color beams are preferably spaced angularly, for example at a 90 ° angle.
- the component 16 To observe the color change of the zone Z2, the component 16 must be turned by a quarter of a turn, or a rotation of a quarter turn of the observation direction 24A of the component 16 towards the observation direction 24B ( Figure 2A ).
- the second optical effect has, for example, a third non-diffracting aspect in a third observation configuration corresponding to the shading observation 24C ( Figure 2B ).
- network parameter is meant, for example, a number of lines per unit length, a physical profile of the network structure, a line orientation of the network, etc.
- the security component 16 comprises an image 18 which extends at least partially in the two zones Z1 and Z2.
- the component 16 has a generally parallelepipedal shape and the zones Z1 and Z2 extend over the entire surface of the component 16.
- the zones Z1 and Z2 may occupy only partially the surface of the component 16 .
- the first and second zones Z1 and Z2 are arranged between them to form an alternating pattern, for example oblique hatching as illustrated in the various figures.
- the zones Z1 and Z2 are adjacent.
- the zones Z1 and Z2 may be spatially spaced or overlap partially.
- the arrangement of zones Z1 and Z2 can be varied: for example, the zones can form concentric disks, nestings of geometric shapes, etc.
- the image 18 is structurally configured to act with the first and second optical effects.
- the image 18 acts in such a way that at least the first 20 and second 22 graphic elements of the image 18 are respectively revealed in the first and second zones Z1 and Z2.
- the revelation of the elements 20 and 22 is linked in particular with the appearance of at least one of the two aspects respectively of the first and second optical effects.
- graphical elements 20 or 22 include alphanumeric characters.
- the graphic elements include micro-lettering, geometric figures, drawings, portraits, etc.
- the image 18 is formed at least partially in relief.
- the relief of the image 18 is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency, etc.
- the relief is formed by dry stamp printing.
- embossing it is possible to use, for example, a process print-free conventional intaglio print for dry embossing.
- the deformation of the surface by means of a plate engraved with different frames, different lines, with reserve (unframed areas) or latent image (frame perpendicular for example to the overall background frame) makes it possible to reflect light rays incidentally. very different than if they hit a plan element.
- the image 18 comprises at least one frame oriented in a remarkable direction chosen according to at least one of the preferred directions of action of the optical effect considered to obtain an optical synergy.
- the remarkable direction substantially coincides with at least one of the preferred directions of the optical effect considered.
- the image 18 is formed at least partially by a latent image, preferably of simple type.
- the latent image is arranged in register with the first optical effect for example.
- the orientation of the screened part is for example 90 ° with respect to the frame of the diffractive grating producing the first optical effect or possibly parallel to this frame.
- the image 18 is formed by a type of relief positive-negative effect.
- the image 18 is generated by an engraved engraving plate (not shown) or an embossing plate or other engraved tool.
- the image may comprise a non-rasterized background and at least one of the graphic elements may have at least one raster part oriented in a remarkable direction.
- the background or the background of the image 18 is engraved whereas the graphic elements 20 and 22 are unframed as is illustrated in Figure 2C .
- the etched plate comprises a screen portion to form the background and a non-screened portion of substantially planar surface to form the graphic elements.
- the background frame defines a remarkable orientation direction of this frame corresponding to the orientation of the lines 23 of the frame.
- the first graphic element 20 forms a first character string "TECH” extending in the first zone Z1 and the second graphic element 22 forms a second character string "DCBE” extending in the second zone Z2.
- the back ground is formed for example by a plurality of engraved lines, and is as illustrated in detail on the Figure 2C and the remarkable direction 25 of this frame corresponds to the orientation of the lines 23.
- this remarkable direction is aligned substantially with the preferred direction of action of the optical effect considered.
- the first zone Z1 has a dull non-diffracting appearance while the second zone Z2 has a colored appearance of a first color, for example green.
- the first character string 20 does not appear in this orientation while the second string 22 is revealed by the color appearance of the second optical effect and gives the impression of lighting.
- the first zone Z1 keeps its dull, non-diffracting.
- the second zone Z2 changes color very markedly, for example from green to red so the characters "DCBE" remain visible but change color from green to red.
- the background weave acts in combination with the first one. optical effect ( Figure 2B ).
- the first optical effect produced in this direction of grazing observation a rainbow aspect which will have the effect of revealing the first character string "TECH” ( Figure 2B ) thanks to the particular relief structure of the image 18 in the zone Z1.
- the first graphic element 20 of the image 18 then becomes visible by the action of the raster background during the appearance of the rainbow appearance while the second graphic element 22 of the image 18 is hardly perceptible to the naked eye or almost invisible.
- the image 18 is configured so that the first 20 and second 22 elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.
- the first element 20 is scrambled with the appearance of the non-diffractive appearance of the first optical effect and the same is true of the second element 22 which is also scrambled with the extinction of the color the second optical effect.
- the image 18 is a multiple latent image.
- the image 18 includes a bottom 28 having a weft oriented in a first, remarkable direction ( 3D figure ).
- one of the graphic elements has at least one frame oriented in a remarkable direction.
- at least one of the graphic elements 20 or 22 has a frame oriented in a second remarkable direction 32 distinct from the first direction 30.
- the frame of the bottom 28 and the frame of the graphic element 20 or 22 are oriented in the same remarkable direction and are offset relative to each other in a direction substantially transverse to this remarkable direction.
- the frames are periodic of the same period and the offset between the two frames corresponds to half a period.
- the graphic element 22 comprises a first portion 22A raster oriented in a second direction 32 remarkable distinct from the first 30 and a second portion 22B raster oriented in a third remarkable direction 34 distinct from the first 30 and second 32 remarkable directions.
- the second 32 and third 34 directions are perpendicular to each other.
- the second graphic element 22 comprises a first character string "DCBE” and a second character string "TECH".
- the bottom 28 of the image 18 has a frame oriented in a first remarkable direction 30
- the first chain "DCBE” has a frame oriented in the second remarkable direction 32
- the second chain "TECH” has a frame oriented in the third remarkable direction 34.
- the second optical effect associated with the zone Z2 acts in at least two preferred directions. These directions are for example spaced angularly from each other by a quarter turn.
- the first optical effect of the zone Z1 has a rainbow appearance and the second optical effect of the zone Z2 has a dull non-diffracting aspect.
- the first graphical element "DCBE" of the first zone Z1 is revealed by the appearance of the rainbow aspect of the first optical effect.
- the first graphic element "DCBE” has a frame oriented in a remarkable direction corresponding to one of the preferred directions of the second optical effect.
- the second graphic element 22 is concealed by appearance of non-diffracting dull aspect of the second optical effect.
- the second optical effect has a first color appearance of a first color, for example green.
- the first character string "DCBE” of the graphic element 22 having a frame oriented in the second remarkable direction 32 coinciding substantially with the first preferred direction of action of the second optical effect is revealed.
- the other character string "TECH” of the same graphic element 22 is on the other hand scrambled because it has a frame oriented in the third remarkable direction 34 which does not coincide with the preferred direction of the second optical effect.
- the second optical effect has a second colored appearance of a second color, for example red.
- the first graphic element 20 of the image 18 present in the zone Z1 is still scrambled because the first optical effect always has in this direction of observation a dull non-diffracting aspect.
- the second character string "TECH" of the second graphic element 22 is revealed by the red coloration of the second optical effect.
- the image 18 comprises a third graphic element 28.
- This third graphic element 28 is printed for example in offset, flexographic, screen printing, letterpress, intaglio with or without ink, etc.
- the third graphic element 28 is invariant regardless of the observation configuration of the component 16.
- this third graphic element 28 is arranged in registration with respect to the other graphic elements so that it complements the other graphic elements. 20 or 22 for example to provide information.
- the graphic element 22 and the graphic element 28 positioned in register with respect to one another in the second zone Z2.
- the first zone Z1 has, for example, one of the optical effects described above, for example the first optical effect.
- the first zone Z1 may comprise the second optical effect described above.
- the second zone Z2 generates a volume hologram producing an animation effect capable of simulating a displacement of a part of the image as a function of an orientation of the component 16.
- the first graphical element 20 is displayed and the character string "TECH" is revealed for example by the appearance rainbow sky of the first optical effect.
- This second graphic element 22 gives the impression of moving by varying the inclination of the component 16 according to the arrows indicated in the figure.
- the part of the image capable of moving is positioned in registration of another part of the image so that the two parties come to complete them as a component of the orientation.
- the graphic element 20 is simultaneously revealed with the graphic element 22 and the two elements are complemented by a slight inclination of the component 16.
- An observer wishes to authenticate the document-value, that is to say the banknote 10. For this, it causes a rotation of the banknote 10 so as to observe various aspects produced by the optical effects. Depending on the appearance generated by the optical effects, graphic elements appear or disappear with the movements caused by the observer. The observer then quickly authenticates the document-value all the more easily as the appearance changes of the optical effects are well marked. Moreover, because of the complexity of implementation, such a document-value is difficult to falsify.
- optical effects may be implemented within the scope of this invention.
- at least one of the effects can produce a metallized characteristic appearance, for example of alumina, copper or gold type.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Credit Cards Or The Like (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Printing Methods (AREA)
- Endoscopes (AREA)
Description
La présente invention concerne le domaine technique des éléments de sécurité pour documents-valeurs, tels que des documents fiduciaires ou assimilés.The present invention relates to the technical field of security elements for securities documents, such as fiduciary documents or similar.
Par « document fiduciaire », on entend au sens de l'invention tous les documents tels que billets de banque, chèques, cartes bancaires, servant à transmettre une somme d'argent.For the purposes of the invention, "fiduciary document" means all documents such as banknotes, checks, bank cards, used to transmit a sum of money.
Par « document assimilé », on entend tous les documents émis par une administration de l'Etat pour attester de l'identité d'une personne, de ses droits à conduire un véhicule, tels que notamment la carte d'identité, le passeport, le permis de conduire, etc. Par cette expression, on entend également tout document servant à authentifier un objet de valeur tel que par exemple une étiquette apposée sur un vêtement de luxe. On entend également tout document servant à authentifier le paiement d'une taxe comme les vignettes fiscales."Assimilated document" means any document issued by an administration of the State to prove the identity of a person, his rights to drive a vehicle, such as in particular the identity card, the passport, driving license, etc. By this expression is also meant any document used to authenticate an object of value such as for example a label affixed to a luxury garment. We also hear any document used to authenticate the payment of a tax such as tax stamps.
Dans le domaine des documents-valeurs, en particulier des billets de banque, il est connu d'apposer un ou plusieurs composants de sécurité de nature variée afin de protéger ces documents de la contrefaçon.In the field of securities documents, in particular banknotes, it is known to affix one or more security components of varied nature to protect these documents from counterfeiting.
Il existe à ce jour une forte demande pour des documents-valeurs comprenant un ou plusieurs composants de sécurité aisément identifiables à l'oeil nu tout en étant particulièrement complexes à reproduire, lors d'une simple observation attentive. De tels composants de sécurité sont également désignés par « sécurité de premier niveau ».To date, there is a strong demand for security documents comprising one or more security components easily identifiable by the naked eye while being particularly complex to reproduce, with a simple observation. Such security components are also referred to as "first level security".
Généralement, un tel composant de sécurité produit un effet optique consistant en une ou des animations optiques, tels que des jeux de contraste, des changements de couleur, des illusions optiques, etc.Generally, such a security component produces an optical effect consisting of one or more optical animations, such as contrast sets, color changes, optical illusions, and so on.
On connaît déjà de l'état de la technique, notamment de la demande internationale
La complexité de réalisation d'un tel composant réside généralement dans une combinaison de diverses techniques d'impression difficiles à reproduire avec du matériel de reprographie grand public (scanner, imprimantes laser ou à jet d'encre couleur, etc.) et/ou du matériel standard d'imprimerie.The complexity of making such a component generally lies in a combination of various printing techniques that are difficult to reproduce with consumer copying equipment (scanner, laser or color inkjet printers, etc.) and / or standard printing equipment.
L'état de la technique peut être également illustré par les documents commentés ci-après.The state of the art can also be illustrated by the documents commented below.
Enfin,
Le but de la présente invention est de proposer un dispositif de sécurité, par exemple de premier niveau, améliorant les propriétés des composants déjà connus tout en étant très difficile à reproduire afin de garantir une grande difficulté de contrefaçon.The object of the present invention is to provide a security device, for example of the first level, improving the properties of components already known while being very difficult to reproduce to ensure a great difficulty of counterfeiting.
A cet effet, l'invention a notamment pour objet un dispositif de sécurité pour document-valeur comportant un support et, sur ce dernier, un composant de sécurité comprenant au moins des première et deuxième zones produisant respectivement des premier et deuxième effets optiques présentant chacun au moins deux aspects caractéristiques selon des configurations d'observation distinctes du composant, et qui comprend une image au moins partiellement en relief obtenue par déformation dudit composant et dudit support sur lequel est apposé ledit composant, cette image comprenant au moins un premier et un deuxième éléments graphiques, image qui s'étend au moins partiellement dans les deux zones et qu'au moins lesdits premier et deuxième éléments graphiques de l'image sont révélés respectivement dans les première et deuxième zones avec l'apparition de l'un au moins des deux aspects respectivement des premier et deuxième effets optiques, caractérisé par le fait que l'image est configurée de manière à ce que le premier élément soit dissimulé avec l'apparition de l'autre des deux aspects respectivement des premier et deuxième effets optiques, et que le deuxième élément soit dissimulé avec l'apparition de l'autre des deux aspects respectivement des premier et deuxième effets optiques, de sorte que dans une même configuration desdites configurations d'observations, le premier élément graphique soit révélé et le deuxième élément graphique soit dissimulé et réciproquement, c'est-à-dire que dans une autre même configuration desdites configurations d'observation, le deuxième élément graphique soit révélé et le premier élément graphique soit dissimulé.For this purpose, the subject of the invention is in particular a document-value security device comprising a medium and, on the latter, a security component comprising at least first and second regions respectively producing first and second optical effects each having at least two characteristic aspects according to distinct observation configurations of the component, and which comprises an at least partially raised image obtained by deformation of said component and said support on which said component is affixed, this image comprising at least a first and a second graphic element, an image that extends at least partially in the two zones and that at least said first and second graphic elements of the image are revealed respectively in the first and second areas with the appearance of at least one of the two aspects respectively of the first and second optical effects, characterized in that the image is configured so that the first element is concealed with the appearance of the other of the two aspects respectively of first and second optical effects, and that the second element is concealed with the appearance of the other of the two aspects respectively of the first and second optical effects, so that in the same configuration of said observation configurations, the first graphic element is revealed and the second graphic element is concealed and vice versa, that is to say that in another same configuration of said observation configurations, the second graphic element is revealed and the first graphic element is concealed.
L'image, les effets et le relief jouent un rôle combiné. Ainsi, selon l'invention, l'image agit en synergie avec les effets optiques générés pour produire un jeu d'ombre et de lumière, voire même de couleurs, en concentrant, diffusant ou en diffractant la lumière provenant d'une source lumineuse.The image, the effects and the relief play a combined role. Thus, according to the invention, the image acts in synergy with the generated optical effects to produce a play of shadow and light, or even of colors, by concentrating, scattering or diffracting light from a light source.
L'invention propose de mettre à profit les variations lumineuses obtenues pour brouiller, révéler partiellement ou entièrement des informations de sécurité selon des configurations différentes d'observation du composant.The invention proposes to take advantage of the light variations obtained to scramble, reveal partially or entirely security information according to different configurations of observation of the component.
Ainsi, selon la configuration optique d'observation du composant, l'un des effets optiques se combine préférentiellement avec une des parties de l'image pour produire un effet d'allumage ou d'extinction de la partie concernée.Thus, depending on the optical observation configuration of the component, one of the optical effects is preferentially combined with one of the parts of the image to produce an ignition or extinguishing effect of the part concerned.
Dans un mode de réalisation préféré de l'invention, l'image est configurée de manière à ce que les premier et deuxième éléments soient dissimulés avec l'apparition de l'autre des deux aspects respectivement des premier et deuxième effets optiques.In a preferred embodiment of the invention, the image is configured so that the first and second elements are concealed with the appearance of the other of the two aspects respectively of the first and second optical effects.
Ainsi, l'apparition d'un premier aspect lié à un des effets optiques permet la révélation d'un des éléments graphiques alors que l'apparition d'un deuxième aspect permet sa disparition ou sa dissimulation. Par changement de configuration d'observation, il est alors possible de révéler ou cacher une information contenue par exemple dans l'élément graphique en question.Thus, the appearance of a first aspect related to one of the optical effects allows the revelation of one of the graphic elements while the appearance of a second aspect allows its disappearance or dissimulation. By change of observation configuration, it is then possible to reveal or hide information contained for example in the graphic element in question.
Ainsi, dans une même configuration desdites configurations d'observations, le premier élément graphique est révélé et le deuxième élément graphique est dissimuléet réciproquement, c'est-à-dire qu'une autre même configuration desdites configurations d'observation, le deuxième élément graphique soit révélé et le premier élément graphique soit dissimulé. L'information contenue dans les éléments graphiques peut être ainsi partiellement révélée dans une même configuration d'observation.Thus, in the same configuration of said observation configurations, the first graphic element is revealed and the second graphic element is concealed and vice versa, that is to say that another same configuration of said observation configurations, the second graphic element is revealed and the first graphic element is hidden. The information contained in the graphic elements can thus be partially revealed in the same observation configuration.
Le relief précité permet d'agir de façon combinée avec les effets optiques en modifiant localement leurs propriétés optiques de réflexion et de diffusion.The above-mentioned relief makes it possible to act in combination with the optical effects by locally modifying their optical reflection and diffusion properties.
Par exemple, le relief est déterminé par des paramètres de relief choisis parmi une forme de relief, une profondeur de relief, une fréquence spatiale, etc.For example, the relief is determined by relief parameters selected from a relief shape, a relief depth, a spatial frequency, etc.
Préférentiellement, la profondeur de relief est comprise entre 5 et 150 micromètres et le relief est réalisé par déformation du support (embossage).Preferably, the depth of relief is between 5 and 150 micrometers and the relief is achieved by deformation of the support (embossing).
Un dispositif de sécurité selon l'invention peut en outre comporter l'une ou l'autre des caractéristiques selon lesquelles :
- l'un des effets optiques présente au moins trois aspects caractéristiques distincts, un troisième élément graphique de l'image est révélé par l'apparition de ce troisième aspect dans l'une au moins des deux zones ;
- l'image est formée au moins partiellement en relief, sans encre ;
- le relief de l'image est déterminé par des paramètres de relief choisis parmi une forme de relief, une profondeur de relief, une fréquence spatiale ;
- le relief est formé par impression de type timbre sec ;
- l'image est formée au moins partiellement par une image latente de type simple ou multiple ;
- au moins l'un des effets optiques agissant selon au moins une direction privilégiée, l'image comprend au moins une trame orientée selon une direction remarquable choisie par rapport à la direction privilégiée d'action de l'effet optique pour obtenir une synergie optique ;
- l'image comprend un fond, le fond présente une trame orientée selon une première direction remarquable et au moins l'un des éléments graphiques présente au moins une trame orientée selon une deuxième direction remarquable ;
- l'élément graphique présente au moins deux trames orientées dans deux directions remarquables distinctes ;
- les trames de l'image sont formées en relief ;
- au moins l'un des effets optiques est généré par un réseau diffractif présentant au moins une direction privilégiée de diffraction correspondant par exemple à un ordre de diffraction du réseau, ledit au moins un des effets étant par exemple un aspect caractéristique arc-en-ciel ;
- au moins l'un des effets produit un premier aspect coloré d'une première couleur et un deuxième aspect coloré d'une deuxième couleur ;
- au moins l'un des effets est généré par un filtre de soustraction de couleur par diffraction ;
- au moins l'un des effets est généré par un hologramme volumique produisant un effet d'animation apte à simuler un déplacement d'une partie de l'image en fonction d'une configuration d'observation du composant ;
- la partie de l'image est positionnée par exemple en repérage d'une autre partie de l'image de manière à ce que les deux parties viennent se compléter entre elles selon une orientation du composant ;
- les deux zones de la structure forment ensemble un motif, par exemple les deux zones sont agencées en alternance ;
- le relief de l'image est formé par gaufrage durant une étape de transfert à chaud ou à froid d'un film de marquage présentant lesdites zones produisant respectivement lesdits effets optiques.
- one of the optical effects has at least three distinct characteristic aspects, a third graphic element of the image is revealed by the appearance of this third aspect in at least one of the two zones;
- the image is formed at least partially in relief, without ink;
- the relief of the image is determined by relief parameters selected from a relief shape, a depth of relief, a spatial frequency;
- the relief is formed by dry stamp type printing;
- the image is formed at least partially by a latent image of single or multiple type;
- at least one of the optical effects acting in at least one preferred direction, the image comprises at least one frame oriented in a remarkable direction chosen with respect to the preferred direction of action of the optical effect to obtain an optical synergy;
- the image comprises a background, the background has a frame oriented in a first direction remarkable and at least one of the graphic elements has at least one frame oriented in a second direction remarkable;
- the graphic element has at least two frames oriented in two distinct distinct directions;
- the frames of the image are formed in relief;
- at least one of the optical effects is generated by a diffractive grating having at least one preferred direction of diffraction corresponding for example to a diffraction order of the grating, said at least one of the effects being for example a characteristic rainbow appearance ;
- at least one of the effects produces a first color appearance of a first color and a second color appearance of a second color;
- at least one of the effects is generated by a diffraction color subtraction filter;
- at least one of the effects is generated by a volume hologram producing an animation effect capable of simulating a displacement of a part of the image according to an observation configuration of the component;
- the part of the image is positioned for example in registering another part of the image so that the two parts complement each other in an orientation of the component;
- the two zones of the structure together form a pattern, for example the two zones are arranged alternately;
- the relief of the image is formed by embossing during a step of hot or cold transfer of a marking film having said zones respectively producing said optical effects.
L'invention a encore pour objet un document-valeur, tel qu'un billet de banque comprenant un dispositif de sécurité selon l'invention.The invention also relates to a document-value, such as a bank note comprising a security device according to the invention.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lumière de la description qui suit, faite en référence aux dessins annexés dans lesquels :
- la
figure 1 représente un document-valeur tel qu'un billet de banque comprenant un composant de sécurité selon un premier mode de réalisation de l'invention ; - les
figures 2A et 2B représentent le composant de sécurité de lafigure 1 selon deux points de vue différents; - la
figure 2C représente une vue en détail d'une partie de l'image ; - les
figures 3A à 3C représentent le composant de sécurité selon un deuxième mode de réalisation de l'invention selon respectivement trois points de vue différents ; - la
figure 3D représente une vue en détail d'une partie de l'image ; - la
figure 4 représente le composant de sécurité selon un troisième mode de réalisation de l'invention ; et - les
figures 5A à 5C représentent le composant de sécurité selon un quatrième mode de réalisation de l'invention selon respectivement trois points de vue différents, étant entendu qu'aucune protection n'est revendiquée sur ce mode de réalisation.
- the
figure 1 represents a document-value such as a bank note comprising a security component according to a first embodiment of the invention; - the
Figures 2A and 2B represent the security component of thefigure 1 according to two different points of view; - the
Figure 2C represents a detail view of part of the image; - the
FIGS. 3A to 3C represent the security component according to a second embodiment of the invention according to three different points of view respectively; - the
3D figure represents a detail view of part of the image; - the
figure 4 represents the security component according to a third embodiment of the invention; and - the
FIGS. 5A to 5C represent the security component according to a fourth embodiment of the invention according to three different points of view respectively, it being understood that no protection is claimed in this embodiment.
On a représenté sur la
Le document 10 comprend un support 12, réalisé dans un matériau comprenant par exemple essentiellement du papier, du plastique ou un mélange des deux. Bien entendu, l'invention n'est pas limitée à un matériau particulier pour le support. Le matériau du support peut également présenter une structure multicouche, le cas échéant comporter plusieurs couches laminées ensemble.The
Comme cela est illustré sur la
Conformément à l'invention, le composant de sécurité 16 comprend des première Z1 et deuxième Z2 zones produisant respectivement des premier et deuxième effets optiques. Les premier et deuxième effets optiques sont susceptibles de présenter chacun au moins deux aspects caractéristiques selon des configurations d'observation distinctes du composant 16. Dans l'exemple illustré, les deux aspects sont bien différenciés ce qui permet à un observateur de les distinguer aisément.According to the invention, the
Au sens de l'invention, une configuration d'observation est définie par un ensemble de paramètres d'observation tels que par exemple une orientation du composant 16 par rapport à une direction d'observation, une position relative d'une source lumineuse, la dimension de la source, les longueurs d'onde d'émission de la source, sa puissance d'émission, etc.Within the meaning of the invention, an observation configuration is defined by a set of observation parameters such as, for example, an orientation of the
Ainsi, le premier effet par exemple présente un premier aspect selon des première et deuxième configurations d'observation (
Dans l'exemple décrit et illustré par les figures, les effets optiques varient notamment selon des orientations prédéfinies du composant 16 relativement à une source lumineuse S représentée schématiquement sur les figures par un soleil et plus précisément par rapport à une direction d'éclairage (non indiquée sur les figures).In the example described and illustrated by the figures, the optical effects vary in particular according to predefined orientations of the
Bien entendu, la source lumineuse S peut émettre un faisceau directif ou diffus. Bien que l'invention ne s'y limite pas, celle-ci est particulièrement bien adaptée à être utilisée avec une lumière polychromatique visible (par exemple blanche) diffuse éclairant le composant de sécurité.Of course, the light source S can emit a directional or diffuse beam. Although the invention is not limited thereto, it is particularly well suited to be used with a diffuse visible (eg white) polychromatic light illuminating the security component.
Bien entendu, en variante, la source lumineuse S peut comporter un spectre de longueur d'onde hors du domaine visible (classiquement défini entre 0,4 à 0,7 micromètres) par exemple dans le domaine ultra-violet de spectre de longueur d'onde inférieure à 0,4 micromètres ou le domaine infrarouge de spectre de longueur d'onde au-delà de 0,7 micromètres. Dans ce cas, il est généralement nécessaire d'utiliser un détecteur spécifique pour observer la sécurité optique.Of course, alternatively, the light source S may comprise a spectrum of wavelength outside the visible range (conventionally defined between 0.4 and 0.7 micrometers), for example in the ultraviolet spectrum of length spectrum. wave less than 0.4 micrometers or the infrared range of wavelength spectrum beyond 0.7 micrometers. In this case, it is usually necessary to use a specific detector to observe the optical security.
Par exemple, les effets optiques agissent chacun selon au moins une direction privilégiée dont l'orientation dépend par exemple notamment de la direction d'éclairage principale de la source S.For example, the optical effects each act in at least one preferred direction, the orientation of which depends for example on the main illumination direction of the source S.
Dans l'exemple décrit, le premier effet optique associé à la zone Z1 est généré par un réseau diffractif produisant au moins un premier aspect caractéristique arc-en-ciel selon au moins une direction d'observation rasante 24C (
Ainsi, de préférence, le premier effet optique possède au moins une direction privilégiée d'action qui est liée, dans le cas d'un réseau diffractif, notamment à la direction d'un ordre de diffraction de ce réseau. La direction d'observation 24C est déterminée dans cet exemple, notamment par la direction d'éclairage du composant 16 et coïncide par exemple sensiblement avec une direction d'un ordre de diffraction du réseau.Thus, preferably, the first optical effect has at least one preferred direction of action which is linked, in the case of a diffractive grating, notably to the direction of a diffraction order of this grating. The
Ainsi, le réseau diffractant présente de préférence au moins une direction privilégiée de diffraction qui détermine la direction d'observation 24A et 24B de l'aspect arc-en-ciel du premier effet. Cette direction de diffraction est elle-même définie par exemple par rapport à la direction d'éclairage de référence de la source S.Thus, the diffractive grating preferably has at least one preferred direction of diffraction which determines the
De façon connue en soi, un réseau diffractant est généralement formé par un arrangement régulier d'éléments diffractant identiques. Chacun des éléments diffracte la lumière incidente dans toutes les directions et chaque faisceau diffracté dans une direction interfère avec les autres rayons diffractant dans la même direction. Le réseau permet de produire une dispersion chromatique à l'origine de l'aspect arc-en-ciel observable selon au moins une direction d'observation.In a manner known per se, a diffractive grating is generally formed by a regular arrangement of identical diffracting elements. Each of the elements diffracts the incident light in all directions and each diffracted beam in one direction interferes with the other diffracting beams in the same direction. The network makes it possible to produce a chromatic dispersion at the origin of the rainbow appearance observable according to at least one observation direction.
Dans l'exemple décrit, le réseau comprend une pluralité de traits s'étendant selon une direction longitudinale qui détermine la direction privilégiée de diffraction.In the example described, the network comprises a plurality of lines extending in a longitudinal direction which determines the preferred direction of diffraction.
Dans ce premier mode de réalisation, le deuxième effet associé à la zone Z2 produit un premier aspect coloré d'une première couleur observable selon l'une des configurations et un deuxième aspect coloré d'une deuxième couleur observable selon l'autre des configurations. Dans l'exemple décrit, la première couleur est verte et la deuxième couleur est rouge.In this first embodiment, the second effect associated with zone Z2 produces a first color appearance of a first observable color according to one of the configurations and a second color aspect of a second observable color according to the other of the configurations. In the example described, the first color is green and the second color is red.
De préférence, le deuxième effet optique associé à la deuxième zone Z2 est généré par un filtre de soustraction de couleur par diffraction. Ce deuxième effet optique est produit par exemple par une structure en réseau de diffraction ayant des paramètres de réseau prédéfinis de manière à ce que la structure diffractive soit configurée pour séparer une lumière polychromatique incidente en au moins une paire de faisceaux réfléchis adjacents distincts angulairement et de couleurs contrastantes.Preferably, the second optical effect associated with the second zone Z2 is generated by a diffraction color subtraction filter. This second optical effect is produced, for example, by a diffraction grating structure having predefined network parameters so that the diffractive structure is configured to separate an incident polychromatic light into at least one pair of angularly separate adjacent reflected beams and contrasting colors.
Dans le cas de ce deuxième effet optique à changement de couleur, le réseau diffractif possède de préférence deux directions privilégiées d'action correspondant à chacune des couleurs contrastantes. En outre, les faisceaux de couleur rouge et verte sont de préférence espacés angulairement, par exemple d'un angle de 90°.In the case of this second optical effect with a color change, the diffractive grating preferably has two preferred directions of action corresponding to each of the contrasting colors. In addition, the red and green color beams are preferably spaced angularly, for example at a 90 ° angle.
Autrement dit, pour observer le changement de couleur de la zone Z2, il faut tourner le composant 16 d'un quart de tour, ou encore effectuer une rotation d'un quart de tour de la direction d'observation 24A du composant 16 vers la direction d'observation 24B (
En outre, le deuxième effet optique présente par exemple un troisième aspect non diffractant dans une troisième configuration d'observation correspondant à l'observation rasante 24C (
Par paramètre de réseau, on entend par exemple un nombre de traits par unité de longueur, un profil physique de la structure de réseau, une orientation des traits du réseau, etc.By network parameter is meant, for example, a number of lines per unit length, a physical profile of the network structure, a line orientation of the network, etc.
Conformément à l'invention, le composant de sécurité 16 comprend une image 18 qui s'étend au moins partiellement dans les deux zones Z1 et Z2.According to the invention, the
Dans l'ensemble de la demande, on entend par "image en relief obtenue par déformation du composant et du support sur lequel est apposé ledit composant", une représentation graphique formée d'un seul ou de plusieurs éléments graphiques qui, dans ce dernier cas, peuvent être séparés les uns des autres.Throughout the application, the term "relief image obtained by deformation of the component and the support on which said component is affixed", a graphical representation formed of one or more graphic elements which, in the latter case , can be separated from each other.
Dans cet exemple, le composant 16 a une forme générale parallélépipédique et les zones Z1 et Z2 s'étendent sur toute la surface du composant 16. Toutefois, en variante, les zones Z1 et Z2 peuvent n'occuper que partiellement la surface du composant 16.In this example, the
Dans les exemples décrits dans cette demande, les première et deuxième zones Z1 et Z2 sont agencées entre elles pour former un motif alterné, par exemple des hachures obliques comme cela est illustré sur les différentes figures. Dans l'exemple illustré sur les figures, les zones Z1 et Z2 sont adjacentes. Toutefois, dans une variante non illustrée sur les figures, les zones Z1 et Z2 peuvent être espacées spatialement ou se chevaucher partiellement. Bien entendu, dans une autre variante, l'agencement des zones Z1 et Z2 peut être varié : par exemple, les zones peuvent former des disques concentriques, des imbrications de formes géométriques, etc.In the examples described in this application, the first and second zones Z1 and Z2 are arranged between them to form an alternating pattern, for example oblique hatching as illustrated in the various figures. In the example illustrated in the figures, the zones Z1 and Z2 are adjacent. However, in a variant not shown in the figures, the zones Z1 and Z2 may be spatially spaced or overlap partially. Of course, in another variant, the arrangement of zones Z1 and Z2 can be varied: for example, the zones can form concentric disks, nestings of geometric shapes, etc.
Conformément à l'invention, l'image 18 est structurellement configurée pour agir avec les premier et deuxième effets optiques. Ainsi, conformément à l'invention, l'image 18 agit de manière à ce qu'au moins des premier 20 et deuxième 22 éléments graphiques de l'image 18 soient révélés respectivement dans les première et deuxième zones Z1 et Z2. La révélation des éléments 20 et 22 est liée notamment avec l'apparition de l'un au moins des deux aspects respectivement des premier et deuxième effets optiques.According to the invention, the
Par exemple, les éléments graphiques 20 ou 22 comprennent des caractères alphanumériques. Dans une variante non illustrée, les éléments graphiques comprennent des micro-lettrages, des figures géométriques, des dessins, des portraits, etc.For example,
Dans l'exemple décrit, pour agir avec les effets optiques, l'image 18 est formée au moins partiellement en relief. De préférence, le relief de l'image 18 est déterminé par des paramètres de relief choisis parmi une forme de relief, une profondeur de relief, une fréquence spatiale, etc.In the example described, to act with the optical effects, the
Dans ces conditions, ce relief, en plus d'être perçu visuellement, l'est également tactilement, ce qui renforce la sécurité du composant.In these conditions, this relief, in addition to being perceived visually, is also visually, which reinforces the security of the component.
Par exemple, le relief est formé par impression de type timbre sec. Pour effectuer cet embossage, on peut utiliser par exemple un procédé d'impression taille-douce classique sans encre pour obtenir un embossage à sec.For example, the relief is formed by dry stamp printing. To carry out this embossing, it is possible to use, for example, a process print-free conventional intaglio print for dry embossing.
Ainsi, la déformation de la surface grâce à une plaque gravée avec différentes trames, différentes linéatures, avec réserve (zones non tramées) ou image latente (trame perpendiculaire par exemple à la trame globale de fond) permet de réfléchir les rayons lumineux incidents de manière très différente que s'ils frappaient un élément plan.Thus, the deformation of the surface by means of a plate engraved with different frames, different lines, with reserve (unframed areas) or latent image (frame perpendicular for example to the overall background frame) makes it possible to reflect light rays incidentally. very different than if they hit a plan element.
Grâce à ces déformations, on arrive à rendre plus mates (moins brillantes) les zones Z1 et Z2 par la mise en oeuvre du "timbre sec" et donc à renforcer l'effet d'extinction/d'allumage des effets optiques dans un effet de synergie.Thanks to these deformations, we manage to make the zones Z1 and Z2 duller (less brilliant) by the implementation of the "dry stamp" and thus to reinforce the extinguishing / lighting effect of the optical effects in an effect. synergy.
De préférence, l'image 18 comprend au moins une trame orientée selon une direction remarquable choisie en fonction d'au moins l'une des directions privilégiées d'action de l'effet optique considéré pour obtenir une synergie optique. Par exemple, la direction remarquable coïncide sensiblement avec au moins l'une des directions privilégiées de l'effet optique considéré.Preferably, the
L'homme du métier trouvera sans difficulté une orientation relative de la trame de l'image par rapport à l'une des directions d'action privilégiée de l'effet optique considéré offrant une synergie optique optimale.Those skilled in the art will easily find a relative orientation of the frame of the image with respect to one of the preferred directions of action of the optical effect considered to offer an optimal optical synergy.
Par exemple, l'image 18 est formée au moins partiellement par une image latente, de préférence de type simple. L'image latente est agencée en repérage avec le premier effet optique par exemple. L'orientation de la partie tramée est par exemple de 90° par rapport à la trame du réseau diffractif produisant le premier effet optique ou éventuellement parallèle à cette trame.For example, the
Dans le premier mode de réalisation illustré par les
Dans l'exemple, l'arrière-plan ou le fond de l'image 18 est tramé alors que les éléments graphiques 20 et 22 sont non tramés comme cela est illustré sur la
Dans ce premier mode de réalisation, le premier élément graphique 20 forme une première chaîne de caractères « TECH » s'étendant dans la première zone Z1 et le deuxième élément graphique 22 forme une deuxième chaîne de caractères « DCBE » s'étendant dans la deuxième zone Z2.In this first embodiment, the first
La trame de fond est formée par exemple par une pluralité de lignes gravées, et est telle qu'illustrée en détail sur la
Selon une première orientation du composant 16 illustrée par la
Lorsque l'observateur tourne d'un quart de tour dans son plan comme illustré dans la
Lorsque la direction d'observation, correspondant par exemple en observation rasante 24C, coïncide avec l'une des directions privilégiées du premier effet optique, la trame de fond agit de façon combinée avec le premier effet optique (
Le premier élément graphique 20 de l'image 18 devient alors visible par action du fond tramé lors de l'apparition de l'aspect arc-en-ciel alors que le deuxième élément graphique 22 de l'image 18 est difficilement perceptible à l'oeil nu voire quasiment invisible.The first
De préférence, l'image 18 est configurée de manière à ce que les premier 20 et deuxième 22 éléments soient dissimulés avec l'apparition de l'autre des deux aspects respectivement des premier et deuxième effets optiques.Preferably, the
Ainsi, dans ce premier mode de réalisation, le premier élément 20 est brouillé avec l'apparition de l'aspect non diffractant du premier effet optique et il en va de même du deuxième élément 22 qui est également brouillé avec l'extinction de la couleur du deuxième effet optique.Thus, in this first embodiment, the
Par ailleurs, dans ce premier mode de réalisation, dans une même configuration d'observation, par exemple celle illustrée sur la
On a représenté sur les
Dans ce deuxième mode de réalisation, l'image 18 est une image latente multiple. Par exemple, l'image 18 comprend un fond 28 présentant une trame orientée selon une première direction remarquable 30 (
En outre, de préférence, l'un des éléments graphiques présente au moins une trame orientée selon une direction remarquable. Ainsi, au moins un des éléments graphiques 20 ou 22 présente une trame orientée selon une deuxième direction remarquable 32 distincte de la première direction 30.In addition, preferably, one of the graphic elements has at least one frame oriented in a remarkable direction. Thus, at least one of the
Dans une variante non illustrée sur les figures, la trame du fond 28 et la trame de l'élément graphique 20 ou 22 sont orientées dans une même direction remarquable et sont décalées l'une par rapport à l'autre selon une direction sensiblement transversale à cette direction remarquable. Par exemple, les trames sont périodiques de même période et le décalage entre les deux trames correspond à une demi-période.In a variant not illustrated in the figures, the frame of the bottom 28 and the frame of the
Dans l'exemple illustré sur la
Par exemple, le deuxième élément graphique 22 comprend une première chaîne de caractères « DCBE » et une deuxième chaîne de caractères « TECH ». Ainsi, dans ce mode de réalisation, le fond 28 de l'image 18 présente une trame orientée selon une première direction remarquable 30, la première chaîne « DCBE » présente une trame orientée selon la deuxième direction remarquable 32 et la deuxième chaîne « TECH » présente une trame orientée selon la troisième direction remarquable 34.For example, the second
En outre, de préférence, le deuxième effet optique associé à la zone Z2 agit selon au moins deux directions privilégiées. Ces directions sont par exemple espacées entre elles angulairement d'un quart de tour.In addition, preferably, the second optical effect associated with the zone Z2 acts in at least two preferred directions. These directions are for example spaced angularly from each other by a quarter turn.
Par exemple, dans la première configuration d'observation illustrée par la
Dans cette configuration, le premier élément graphique 20 « DCBE » de la première zone Z1 est révélé par l'apparition de l'aspect arc-en-ciel du premier effet optique. Par exemple, le premier élément graphique 20 « DCBE » présente une trame orientée selon une direction remarquable correspondant à l'une des directions privilégiées du deuxième effet optique. En revanche, le deuxième élément graphique 22 est dissimulé par apparition de l'aspect terne non diffractant du deuxième effet optique.In this configuration, the first graphical element "DCBE" of the first zone Z1 is revealed by the appearance of the rainbow aspect of the first optical effect. For example, the first graphic element "DCBE" has a frame oriented in a remarkable direction corresponding to one of the preferred directions of the second optical effect. In contrast, the second
Dans une deuxième configuration d'observation illustrée par la
Enfin, dans une troisième configuration d'observation illustrée par la
On a représenté un troisième mode de réalisation sur la
On a représenté un quatrième mode de réalisation (qui ne fait toutefois pas partie de la présente invention) sur les
Dans ce mode de réalisation, la deuxième zone Z2 génère un hologramme volumique produisant un effet d'animation apte à simuler un déplacement d'une partie de l'image en fonction d'une orientation du composant 16.In this embodiment, the second zone Z2 generates a volume hologram producing an animation effect capable of simulating a displacement of a part of the image as a function of an orientation of the
Ainsi, comme cela est illustré sur la
Selon une deuxième orientation du composant 16 illustrée sur la
De préférence, comme cela est illustré sur la
On va maintenant décrire les principaux aspects de fonctionnement d'un composant selon l'invention en référence par exemple au premier mode de réalisation de l'invention illustré sur les
Un observateur souhaite authentifier le document-valeur, c'est-à-dire le billet de banque 10. Pour cela, il provoque une rotation du billet de banque 10 de manière à observer divers aspects produits par les effets optiques. Selon l'aspect généré par les effets optiques, des éléments graphiques apparaissent ou disparaissent avec les mouvements provoqués par l'observateur. L'observateur authentifie alors rapidement le document-valeur d'autant plus facilement que les changements d'aspect des effets optiques sont bien marqués. Par ailleurs, du fait de la complexité de réalisation, un tel document-valeur est difficilement falsifiable.An observer wishes to authenticate the document-value, that is to say the
Bien que l'invention ait été décrite par des exemples en référence aux figures d'accompagnement, il est entendu que de nombreuses modifications peuvent venir à l'esprit de l'homme du métier sans pour autant sortir de la portée de la présente invention.Although the invention has been described by way of example with reference to the accompanying figures, it is understood that many modifications may come to the mind of those skilled in the art without departing from the scope of the present invention.
D'autres effets optiques peuvent être mis en oeuvre dans le cadre de cette invention. Ainsi, au moins l'un des effets peut produire un aspect caractéristique métallisé, par exemple de type aluminé, cuivré ou doré.Other optical effects may be implemented within the scope of this invention. Thus, at least one of the effects can produce a metallized characteristic appearance, for example of alumina, copper or gold type.
Claims (17)
- A security device for valuable document (10) comprising a substrate (12) and thereupon a security component (16) comprising at least first (Z1) and second (Z2) zones respectively producing first and second optical effects each having at least two characteristic aspects according to different observation configurations of the component (16), and which comprises an image (18) at least partly in relief obtained by deformation of the said component (16) and of said substrate (10) on which said component (16) is affixed, this image comprising at least one first and one second graphic element (20; 22), image extending at least partly in the two zones (Z1, Z2), and at least said first (20) and second (22) graphic elements of the image (18) are revealed in the first (Z1) and second (Z2) zones respectively with the onset of the visibility of at least one of the two aspects of the first and second optical effects respectively, characterized in that the image (18) is configured in such a way that the first element (20) is concealed with the onset of the visibility of the other of the two aspects of the first and second optical effects respectively, and the second element (22) is concealed with the onset of visibility of the other of the two aspects of the first and second optical effects, respectively so that in one same observation configuration of said observation configurations, the first graphic element (20) is revealed and the second graphic element (22) is concealed, and reciprocally, that is to say in another same configuration of said observation configurations, the second graphic element (22) is revealed and the first element (20) is concealed.
- The device according to claim 1 wherein one of the optical effects has at least three different characteristic aspects, a third graphic element of the image (18) is revealed through the appearing of this third aspect in at least one of the two zones (Z1, Z2).
- The device according to any of the preceding claims wherein the image (18) is at least partly formed in relief, without ink.
- The device according to the preceding claim wherein the relief of the image (18) is determined by relief parameters chosen from among a relief shape, relief depth, spatial frequency.
- The device according to claim 3 or 4 wherein the relief is formed by print of dry embossing type.
- The device according to any of the preceding claims, wherein the image (18) is formed at least in part by a latent image of simple or multiple type.
- The device according to any of the preceding claims wherein, since at least one of the optical effects acts in at least one priority direction, the image (18) comprises at least one screen oriented in a discernible direction chosen in relation to the priority direction of action of the optical effect to obtain optical synergy.
- The device according to any of the preceding claims wherein the image (18) comprises a background (28) the background (28) has a screen oriented in a first discernible direction (30) and at least one of the graphic elements (22, 22A, 22B) has at least one screen oriented in a second discernible direction (32, 34) .
- The device according to any of the preceding claims wherein the graphic element (22, 22A, 22B) has at least two screens oriented in two different discernible directions.
- The device according any of claims 7 to 9 wherein the screens of the image (18) are formed in relief.
- The device according to any of the preceding claims wherein at least one of the optical effects is generated by a diffraction grating having at least one priority direction of diffraction, corresponding for example to an order of diffraction of the grating, said at least one of the effects being for example a characteristic rainbow aspect.
- The device according to any of the preceding claims wherein at least one of the effects produces a first coloured aspect of a first colour and a second coloured aspect of a second colour.
- The device according to any of the preceding claims wherein at least one of the effects is generated by a colour subtraction filter via diffraction.
- The device according to any of the preceding claims wherein at least one of the effects is generated by a volume hologram producing an animated effect capable of simulating movement of part of the image (18) in relation to an observation configuration of the component (16), said part of the image (18) being positioned for example with reference to another part of the image (18) so that the two parts come to complement each other in one orientation of the component (16).
- The device according to any of the preceding claims wherein the two zones (Z1, Z2) together form a pattern, for example the two zones are alternately arranged.
- The device according to one of the preceding claims characterized by the fact that the relief of the image (18) is formed by embossing during a hot or cold transfer step of stamping foil comprising the said zones (Z1; Z2) respectively producing the said optical effects.
- A valuable document (10) such as a banknote characterized in that it integrates a security device according to any of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1059280A FR2967089B1 (en) | 2010-11-10 | 2010-11-10 | OPTICALLY VARIABLE SECURITY COMPONENT FOR A VALUE DOCUMENT |
PCT/EP2011/069868 WO2012062871A1 (en) | 2010-11-10 | 2011-11-10 | Optically variable security device for a valuable document |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2637875A1 EP2637875A1 (en) | 2013-09-18 |
EP2637875B1 true EP2637875B1 (en) | 2019-05-22 |
Family
ID=44166469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11779701.9A Active EP2637875B1 (en) | 2010-11-10 | 2011-11-10 | Optically variable security device for a valuable document |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2637875B1 (en) |
CN (1) | CN102463768B (en) |
AU (1) | AU2011328044B2 (en) |
BR (1) | BR112013011614B1 (en) |
CA (1) | CA2816384C (en) |
ES (1) | ES2742778T3 (en) |
FR (1) | FR2967089B1 (en) |
RU (1) | RU2586812C2 (en) |
WO (1) | WO2012062871A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012015900A1 (en) * | 2012-08-10 | 2014-03-06 | Giesecke & Devrient Gmbh | Security element with coloreffective grid |
KR101950553B1 (en) * | 2012-12-10 | 2019-02-20 | 오렐 퓌슬리 지혀하이츠드럭 에이지 | Security document with security feature |
DE102017005192A1 (en) * | 2017-05-31 | 2018-12-06 | Giesecke+Devrient Currency Technology Gmbh | Security element with two tilting effects |
US11685180B2 (en) * | 2019-08-19 | 2023-06-27 | Crane & Co., Inc. | Micro-optic security device with zones of color |
CN113147216B (en) * | 2021-05-24 | 2022-09-13 | 中钞印制技术研究院有限公司 | Optical anti-counterfeiting element, detection method and device thereof, manufacturing method and device thereof, and security article |
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2011
- 2011-05-13 CN CN201110137931.2A patent/CN102463768B/en active Active
- 2011-11-10 CA CA2816384A patent/CA2816384C/en active Active
- 2011-11-10 AU AU2011328044A patent/AU2011328044B2/en not_active Ceased
- 2011-11-10 BR BR112013011614A patent/BR112013011614B1/en not_active IP Right Cessation
- 2011-11-10 WO PCT/EP2011/069868 patent/WO2012062871A1/en active Application Filing
- 2011-11-10 EP EP11779701.9A patent/EP2637875B1/en active Active
- 2011-11-10 ES ES11779701T patent/ES2742778T3/en active Active
- 2011-11-10 RU RU2013126541/12A patent/RU2586812C2/en active
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Also Published As
Publication number | Publication date |
---|---|
ES2742778T3 (en) | 2020-02-17 |
RU2013126541A (en) | 2014-12-20 |
BR112013011614A2 (en) | 2016-08-09 |
EP2637875A1 (en) | 2013-09-18 |
BR112013011614B1 (en) | 2020-05-05 |
CA2816384A1 (en) | 2012-05-18 |
FR2967089B1 (en) | 2021-05-21 |
AU2011328044B2 (en) | 2015-12-24 |
RU2586812C2 (en) | 2016-06-10 |
CN102463768B (en) | 2016-05-04 |
WO2012062871A1 (en) | 2012-05-18 |
CA2816384C (en) | 2019-10-29 |
AU2011328044A1 (en) | 2013-05-30 |
CN102463768A (en) | 2012-05-23 |
FR2967089A1 (en) | 2012-05-11 |
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