EP3245074A1 - Optische sicherheitskomponente - Google Patents
Optische sicherheitskomponenteInfo
- Publication number
- EP3245074A1 EP3245074A1 EP16705562.3A EP16705562A EP3245074A1 EP 3245074 A1 EP3245074 A1 EP 3245074A1 EP 16705562 A EP16705562 A EP 16705562A EP 3245074 A1 EP3245074 A1 EP 3245074A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- dielectric
- excitation
- optical component
- deposited
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 91
- 239000000049 pigment Substances 0.000 claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 308
- 230000005284 excitation Effects 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 239000002184 metal Substances 0.000 claims description 45
- 239000011241 protective layer Substances 0.000 claims description 32
- 239000012790 adhesive layer Substances 0.000 claims description 16
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 230000004913 activation Effects 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract 2
- 239000000976 ink Substances 0.000 description 58
- 238000000151 deposition Methods 0.000 description 32
- 239000002966 varnish Substances 0.000 description 31
- 239000005083 Zinc sulfide Substances 0.000 description 15
- 230000008021 deposition Effects 0.000 description 14
- 238000005286 illumination Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000007654 immersion Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000000059 patterning Methods 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 238000002211 ultraviolet spectrum Methods 0.000 description 5
- 238000004090 dissolution Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002604 ultrasonography Methods 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000007646 gravure printing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- NFEAIVZJRVEKFD-IPNZSQQUSA-N (4bs,8s)-8-(hydroxymethyl)-4b,8-dimethyl-1-propan-2-yl-5,6,7,8a,9,10-hexahydrophenanthren-2-ol Chemical compound C1CC2[C@@](C)(CO)CCC[C@]2(C)C2=C1C(C(C)C)=C(O)C=C2 NFEAIVZJRVEKFD-IPNZSQQUSA-N 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000002207 thermal evaporation Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000001429 visible spectrum Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—Diffraction gratings; Holograms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
-
- 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
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/43—Marking by removal of material
- B42D25/445—Marking by removal of material using chemical means, e.g. etching
Definitions
- the present invention relates to the field of securing by multilayer films.
- Such multilayer films also called optical security components, are called security in that they are used for the security of identity documents, such as passports and identity cards; for securing fiduciary documents in particular such as bank notes; or for the securing of precious goods; hereinafter 'documents' by brevity.
- a multilayer film is affixed to the document or embedded in the document.
- the multilayer film is embedded in a security tag that is affixed to said valuable good or on its packaging.
- the present invention aims to provide an alternative and secure documents with a multilayer film comprising fluorescent pigments by UV-B and / or UV-C excitation, regardless of the presence or absence of fluorescent ink 107 under illumination.
- UV-A ultraviolet-A.
- the present invention proposes a new control effect of a transparent security component via a perfect registration between the areas of high optical index, observable under visible light (spectral band 400 - 800 nm), and the zones comprising fluorescent pigments in the visible under excitation in UVB and / or UVC.
- the invention relates, according to a first of its objects, to an identity document comprising: a set of at least one destination medium (301) in which or on which a UV-A fluorescent ink (107) is deposited in a localized manner, and
- optical component further comprises:
- the reflective dielectric layer (103) having a relative transmission in the UV-B or UV-C range of not more than 40%;
- the protective layer (106) is screened so as to present islands whose shape, the spacing between two adjacent islands and the dimensions are predetermined.
- the reflective dielectric layer (103) is locally in contact with the structurable layer (102) or in contact with the protective layer (106), so that said optical component has locally one of the stacks among:
- the structurable layer (102) can be provided with a set of structures for generating an optically variable image.
- the assembly (1040) of at least one layer (1042) comprising fluorescent pigments by UV-B or UV-C excitation is composed of:
- first layer (1041) comprising a layer (1042) comprising fluorescent pigments by UV-B or UV-C excitation deposited on the first adhesive layer (1041), then a second adhesive layer (1043) deposited on the layer (1042); or
- a single layer (1042) comprising fluorescent pigments by UV-B or UV-C excitation also comprising adhesive properties.
- the dielectric layer (103) is screened so as to present islands whose shape, the spacing between two adjacent islands and the dimensions are predetermined.
- the multilayer security optical component further comprises at least one of:
- the invention also relates to a method of manufacturing a security optical component, the method comprising the steps of:
- a structural layer (102) on a support film (101) made of plastic or paper the support film (101) and the structuring layer (102) being adjacent or separated from each other by a set of at least one technical layer
- optical component subjecting the optical component to mechanical stress during its immersion, in particular to ultrasound.
- the step of depositing said assembly (1040) of at least one layer (1042) comprising fluorescent pigments when subjected to a light source emitting in the UV spectrum on the reflective layer of dielectric (103) and in contact with the latter comprises depositing at least one layer (1042) comprising fluorescent pigments when they are subjected to a light source emitting in the UV-B or UV-C spectrum.
- the step of depositing said assembly (1040) of at least one layer (1042) comprising fluorescent pigments when subjected to a light source emitting in the UV spectrum on the dielectric reflective layer (103) and in contact therewith comprises at least one of the steps of:
- steps prior to the step of depositing said reflective layer of dielectric (103) can be provided:
- the optical component further comprises a hologram.
- the areas of the layer (108) of varnish or ink soluble in a liquid in contact with the structural layer (102) are deposited in register with said hologram, so that the patterns (201) reproduce the contour of said hologram .
- Areas (202) corresponding to areas of the optical component for which the dielectric layer (103) has been preserved may be provided;
- the method further comprising a step of generating a dithering effect in the zones (202) by depositing the protective layer (106) on the metal layer (105) or deposition of the dielectric layer (103) selectively so as to create islands whose shape, the spacing between two adjacent islands and the dimensions are predetermined.
- Figure 1 illustrates a cross section of a multilayer film according to the prior art
- FIGS. 2A to 2D illustrate sequentially in cross-section a first embodiment of an optical component according to the invention
- FIGS. 3A to 3G illustrate, in cross-section, a second embodiment of an optical component according to the invention
- FIGS. 4A to 4F sequentially illustrate in cross-section a third embodiment of an optical component according to the invention
- FIG. 5A illustrates a reflection view of an optical component according to the invention illuminated a source of visible light
- FIG. 5B illustrates a reflection view of the optical component of FIG. 5A illuminated by a UV-A light source
- FIG. 5C illustrates a reflection view of the optical component of FIG. 5A illuminated by a UV-C light source
- FIG. 6 illustrates the transmission variation of a ZnS layer as a function of its thickness
- FIGS. 7A and 7B illustrate two stages of realization of an embodiment of an optical component according to the invention, comprising a hologram.
- optical component and “multilayer film”; “Ink” and “varnish”; “Film” and “layer”.
- an optical component is described here as being plane. Depending on its constituent materials, it may nevertheless have some flexibility, particularly when the optical component is in the form of self-adhesive label.
- UV-A is meant the spectrum 315-400 nm
- UV-B the spectrum 280-315 nm
- UV-C the spectrum 100-280 nm.
- a multilayer security film is intended to be observed at least in reflection. It comprises a front face and a rear face ( Figure 1).
- the term “front face” defines the face by which the optical component can be illuminated in reflection and "back side” that which is intended to be in contact with a support called “destination”, for example paper, polycarbonate, pvc, or plastic, and for example by an adhesive.
- the destination medium can also have a transparency or opacity less than that of the optical component.
- the relative position of certain layers can influence the optical effects of said component.
- at least some layers are deposited in a predetermined order in order to give the optical security component its optical properties, as described later.
- a cross-section of the optical component is oriented so that the bottom of the optical component corresponds to the front face, that is to say the structurable layer 102 or the film support 101, and that the top of the optical component corresponds to the rear face, that is to say the layer 104 or the assembly 1040, described later.
- the term "deposited on” means that the layer A is located above the layer B in cross section, without necessarily being in contact with it. In terms of manufacturing process, this means, unless otherwise specified, that layer A is subsequently deposited at layer B.
- FIG. 1 illustrates a cross-section of a conventional multilayer film, intended to be affixed to a document 300 comprising a destination medium 301.
- Its manufacturing method is as follows. On a support film 101 of plastic material, essentially allowing the manufacture of the optical component and typically polyethylene terephthalate (PET) or equivalent, a structural layer 102 is deposited.
- the support film 101 serves essentially for the manufacture of the optical component.
- the layer 102 is said to be "structurable” in that it is capable of locally comprising structures, that is to say reliefs and recesses, the dimensions of which (in particular the height) are typically between the nanometer and the micrometer, and which influence the reflection, diffraction or diffusion of an incident electromagnetic wave.
- the layer 102 is said to be "structured" when it comprises such structures.
- the structuring layer may be structured by hot stamping a thermoformable varnish or by cold molding and UV curing an ad hoc varnish (casting varnish) to give the layer 102.
- the support film 101 and the structural layer 102 may be adjacent or separated from each other by a set of at least one so-called “technical layer” layer such as for example a "detachment” layer 109 enabling during the hot activation of subsequently separating the support film 101 from the structural layer 102.
- a layer of zinc sulphide (ZnS) 103 having a thickness of between 10 and 500 nm is deposited by thermal evaporation under vacuum or by any other appropriate mode (electron beam, etc.).
- This layer ZnS 103 uniformly covers the entire surface of the component, that is to say the entire surface of the structural layer 102.
- Some multilayer films further include the locally localized deposition of fluorescent ink by UV-A excitation.
- the zones of a UV-A excitation fluorescent ink 107 may be deposited not on the multilayer film but on the destination medium 301, as illustrated in FIG.
- Fluorescent ink zones typically allow to draw an observable pattern in reflection.
- the technical layer 104 is coated on the entire ZnS layer 103.
- the component comprises fluorescent ink areas 107, these are also covered by the technical layer 104.
- the technical layer 104 may be an adhesive layer, comprising an adhesive material; and / or a protective layer, comprising for example a varnish.
- the absolute value of the optical index variation between the structural layer 102 and the reflective layer of dielectric 103 is greater than or equal to 0.5.
- the reflective layer of dielectric 103 advantageously with high optical index, has a relative transmission in the UV-B and / or UV-C range of not more than 40%, is discontinuous in the plane of the component, so to realize dielectric zones for drawing patterns.
- This reflective layer of dielectric 103 is then coated by an assembly 1040 of at least one layer 1042 comprising fluorescent pigments by UV excitation, and in particular UV-B or UV-C, as described below.
- fluorescent is used concisely.
- fluorescent must be understood as “luminescent photo”, that is to say also encompassing phosphorescence.
- a structuring layer 102 is deposited on a support film 101, in this case plastic.
- the structurable layer 102 and the support film 101 may be directly in contact with each other, as illustrated. It is also possible to provide a set of at least one technical layer between the structurable layer 102 and the support film 101. For example, a so-called "detachment" layer 109 enabling, by hot activation, to subsequently separate the structurable layer 102 from the support film 101. is deposited between the structurable layer 102 and the support film 101, as illustrated in FIG.
- FIG. 2A A first embodiment is illustrated in Figures 2A to 2D.
- selective deposition is provided, in this case by printing, in particular by gravure printing, of a partial layer of soluble varnish 108 (for example a polyvinyl alcohol-based ink) on the structural layer 102, preferably directly in contact with it.
- soluble varnish 108 for example a polyvinyl alcohol-based ink
- Selective deposition in the form of zones of soluble varnish 108 makes it possible to draw patterns 201 when they are observed at least in reflection.
- the reflective layer of dielectric 103 deposited by any known means it is expected to disintegrate the layer 108 for example by immersion of the optical component in a suitable bath, that is to say a bath comprising a solution which breaks down the soluble varnish 108 in contact with it.
- the destruction of the layer 108 has the effect of locally removing the reflective layer of dielectric 103 at the locations of each zone of soluble varnish 108, as shown in Figure 2C.
- Such techniques are known, for example from US 6896938.
- It can further be provided to subject the optical component to mechanical stress during its immersion, for example by a step of subjecting the optical component to ultrasound, which facilitates the disintegration of the soluble ink 108.
- the pattern 201 drawn by the disaggregated zones of the dielectric reflective layer 103 reproduces the pattern 201 drawn by the varnish zones 108 before their dissolution, which is why these two motifs here bear the same reference number.
- the pattern 201 is fluorescently observable when illuminated by a light source emitting in the UV spectrum, but less visible when illuminated by a light source emitting in the visible spectrum. It is then expected to coat the optical component of an assembly 1040 of at least one layer 1042 comprising fluorescent pigments by UV excitation, hereinafter "the" layer 1040 by concision, see FIG. 2D.
- fluorescent pigments by UV excitation or “UV fluorescence ink” it is meant that the pigments (or the ink comprising such pigments) are fluorescent when subjected to a light source emitting in the field of length of UV wave, in particular UV-B or UV-C.
- the assembly 1040 can be made by at least one of the following variants:
- the assembly 1040 is composed of a layer 1042 of fluorescent ink by UV excitation, coated with a layer of glue 1043.
- the assembly 1040 is composed of a first adhesive layer 1041, a layer 1042 of fluorescent ink by UV excitation, then a second adhesive layer 1043.
- the assembly 1040 is composed of a single layer 1042 of UV excitation fluorescent ink also comprising adhesive properties.
- the UV fluorescence ink layer 1042 may be uniformly applied to the optical component, in which case the pattern 201 occurring under UV light observation corresponds to the pattern of the disaggregated areas of the dielectric reflective layer 103, the pattern of which advantageously corresponds to the dissolvable dissolvable pattern 108 (FIG. 2D).
- the UV fluorescence ink layer 1042 can be selectively applied to the optical component, creating UV fluorescence ink areas for patterning when viewed in UV light reflection.
- the observation of the optical component in UV light reflection makes it possible to generate an observable image on three levels: an absence of UV fluorescence ink, a UV fluorescence ink filtered by the dielectric, and a UV fluorescence ink.
- the structural layer 102 may be directly in contact with reflective dielectric layer regions 103, directly in contact with areas 1042 of UV fluorescence ink, or in contact with a first adhesive layer 1041.
- the lower face (reflection side) of the assembly 1040 of at least one layer 1042 comprising fluorescent pigments by UV excitation is in direct contact with the structurable layer 102 or in direct contact with a reflective layer area of dielectric 103.
- the optical component can therefore locally include one of the following stacks:
- a second embodiment is illustrated in Figures 3A-3G.
- a selective deposition of a partial layer of soluble varnish 108 for example a polyvinyl alcohol-based ink
- soluble varnish 108 for example a polyvinyl alcohol-based ink
- the reflective layer of dielectric 103 deposited by any known means it is expected to immerse the optical component to disintegrate the soluble ink 108 which, by its destruction, removes locally the reflective layer of dielectric 103 to the right of each zone of soluble varnish 108, as illustrated in FIG. 2C.
- Such techniques are known, for example from US 6896938. It can further be provided to subject the optical component to mechanical stress during its immersion, for example by a step of subjecting the optical component to ultrasound, which facilitates the disintegration of the soluble ink 108.
- the pattern drawn by the zones of the reflective dielectric layer 103 disintegrated reproduces the pattern drawn by the varnish zones 108 before their dissolution.
- the embodiments illustrated in FIGS. 2A, 2B and 2C are therefore identical to the embodiments illustrated in FIGS. 3A, 3B and 3C respectively.
- a metal layer 105 applied uniformly to the optical component, which has the advantage of having visually different optical characteristics such as, for example, opacity, reflectivity, the diffraction gain, and / or allow plasmonic effects that require the presence of a metal layer.
- a protective layer 106 Directly in contact with the metal layer 105, it is then expected to deposit selectively a protective layer 106, in this case a varnish, as shown in FIG 3E.
- the selective deposition by protective layer zones 106 makes it possible to draw patterns (not shown). It is then expected to de-metallize the metal layer 105, in this case by immersion of the optical component in a sodium hydroxide solution.
- the zones of the metal layer 105 unprotected by the protective layer 106 are then dissolved, as shown in FIG. 3F, which also makes it possible to create a pattern (not illustrated) by de-metallization of the metal layer 105.
- the optical component it is expected to coat the optical component with a set of at least one layer comprising fluorescent pigments in the visible by UV excitation 1040, hereinafter "the" layer 1040 by concision.
- the assembly 1040 can be made by at least one of the following variants.
- the assembly 1040 is composed of a layer 1042 of UV fluorescence ink in the visible light by UV excitation, coated with a layer of glue.
- the assembly 1040 is composed of a first adhesive layer 1041, a layer 1042 of UV visible fluorescence ink by UV excitation (for example a protective coating layer), and then a second layer adhesive 1043.
- the assembly 1040 is composed of a single and same layer 1042 of UV visible fluorescence ink by UV excitation also comprising adhesive properties (see FIG. 3G).
- the assembly 1040 is uniformly applied to the optical component, in which case the pattern 204 appearing under observation under UV-B or UV-C light corresponds to the pattern constituted by the zones of the dielectric reflective layer. 103 disintegrated, the pattern of which corresponds advantageously to the pattern of soluble varnish 108 dissolved, with the exception of the metallized zones, (FIG. 3G).
- the structural layer 102 may be directly in contact with reflective dielectric layer regions 103, directly in contact with the assembly 1040 comprising UV fluorescence ink zones, or in contact with the zones of the metal layer 105 protected by the layer. protection 106.
- the areas of the metal layer 105 protected by the protective layer 106 are in direct contact. They can be either in contact with the structurable layer 102, or stacked on reflective dielectric layer regions 103.
- the upper face of the structurable layer 102 is in contact with the dielectric reflective layer areas 103, the assembly 1040 of at least one layer comprising fluorescent pigments all 1040 by UV excitation, or in contact with areas of the metal layer 105.
- the upper face of the zones of the metal layer 105 is in direct contact with the protective layer 106.
- the lower face (reflection side) of the zones of the metal layer 105 is in contact with the structurable layer 102 or in contact with the dielectric reflective layer areas 103.
- the optical component can therefore locally include one of the following stacks:
- the second embodiment advantageously allows, with respect to the first embodiment, to locally add a stack of zones of the metal layer 105 in direct contact with the protective layer 106, which makes it possible to draw additional patterns, visible in reflection, thanks to the metal layer 105 partially demetallized.
- FIGS. 4A-4F Three Embodiment is illustrated in FIGS. 4A-4F.
- a protective layer 106 in this case a varnish, as shown in FIG 4B.
- the selective deposition by protective layer zones 106 makes it possible to draw patterns.
- De-metallization, or partial metallization is known for example from US5145212.
- the areas of the metal layer 105 unprotected by the protective layer 106 are then dissolved, as shown in FIG. 4B.
- Selective deposition in this case by printing, in particular by gravure printing, of a partial layer of soluble varnish 108 (for example an ink based on polyvinyl alcohol) in contact with the structuring layer 102 or in contact with at least one protective layer area 106, see Figure 4C.
- soluble varnish zones 108 makes it possible to draw patterns when they are observed at least in reflection. It is then expected to cover the component, in this case the structured layer 102, the areas of soluble varnish 108, and the areas of the metal layer 105 protected by the areas of the protective layer 106, by a reflective layer of dielectric 103 (typically ZnS or titanium dioxide ( ⁇ O2)), as shown in FIG. 4D.
- the reflective layer of dielectric 103 deposited by any known means, it is expected to immerse the optical component to disintegrate the soluble ink 108 which, by its destruction, removes locally the reflective layer of dielectric 103 at the locations of each zone of soluble varnish 108, as shown in FIG. 4E.
- the pattern drawn by the zones of the reflective dielectric layer 103 disintegrated reproduces the pattern drawn by the varnish zones 108 before their dissolution (ignoring the metallized zones).
- optical component can further be provided to subject the optical component to mechanical stress during its immersion, for example by a step of subjecting the optical component to ultrasound, which facilitates the disintegration of the soluble ink 108.
- the optical component of a set of at least one layer comprising fluorescent pigments in the visible by UV excitation hereinafter "the" layer 1040 concisely.
- the assembly 1040 can be made by at least one of the following variants.
- the assembly 1040 is composed of a UV visible fluorescence ink layer 1042 by UV excitation, coated with a glue layer 1043.
- the assembly 1040 is composed of a first adhesive layer 1041, a layer 1042 of UV visible fluorescence ink by UV excitation (for example a protective coating layer), and then a second layer adhesive 1043.
- the assembly 1040 is composed of a single and same layer 1042 of UV visible fluorescence ink by UV excitation also comprising adhesive properties (see FIG. 4F).
- the assembly 1040 is uniformly applied to the optical component, in which case the pattern appearing under UV light observation corresponds to the pattern constituted by the zones of the disaggregated dielectric reflective layer 103, whose pattern corresponds to advantageously to the dissolvable dissolvable pattern 108 ( Figure 4F), excluding the metallized areas.
- the structural layer 102 may be directly in contact with reflective dielectric layer regions 103, directly in contact with the assembly 1040 comprising UV fluorescence ink zones, or in contact with the zones of the metal layer 105 protected by the layer. protection 106.
- the upper face of the zones of the metal layer 105 is in direct contact with the protective layer 106.
- the lower face (reflection side) of the zones of the metal layer 105 is in contact with the structurable layer 102.
- the top face of the regions of the dielectric reflective layer 103 is in direct contact with the assembly 1040 comprising UV fluorescence ink areas.
- the lower face (reflection side) of the zones of the dielectric reflective layer 103 is in direct contact with the structurable layer 102, or in direct contact with the protective layer 106.
- the upper face (transmission side) of the protective layer 106 may be in contact with at least one of the areas of the dielectric reflective layer 103 or in direct contact with the assembly 1040 comprising UV fluorescence ink zones.
- the optical component can therefore locally include one of the following stacks:
- the third embodiment advantageously allows, with respect to the second embodiment, to locally interchange the position of the zones of the dielectric reflective layer 103 relative to the stack of zones of the metal layer 105 in direct contact with the layer.
- protection 106 which makes it possible not to subject the dielectric deposit in the de-metallization step of the metal which can cause deterioration of the layer.
- an optical component according to the invention is advantageously integrated with any secure document, for example an identity document, a passport, etc. or a fiduciary document, for example a bank note. It can also be in the form of a label to be glued to a product or valuable.
- Secure documents 200 have a destination medium in the form of paper or plastic which incorporates patterns 203 visible only under illumination by a light source emitting in the UV-A ( Figure 5B).
- the dielectric used for the reflective layer 103 is ZnS
- the ink used for the layer 1042 is a UV fluorescence ink in the visible by UV-C or UV-B excitation because the ZnS is an absorption filter with UV-B and UV-C, as shown in Figure 6 which is an experiment curve performed by the applicant.
- Such pigments are known for example from WO2014048702 and WO2009005733.
- the decrease of the transmission as a function of the thickness clearly illustrates the filter effect exerted by the ZnS layer.
- the fluorescence emitted by the pigments under UV-C is lower than that of pigments under UV-B, itself lower than that of pigments under UV-A. It is estimated empirically that below a relative transmission of 40%, fluorescence is no longer observable.
- said layer 103 is indeed a spectral filter blocking the fluorescence of the pigments of the layer 1042 under UV-B or UV-C whereas the fluorescence of the possible pigments of the ink 107 remain observable.
- a destination medium comprises a fluorescent pigment ink 107 under UV-A illumination and that the optical component according to the invention is locally superimposed with at least one partial layer 107, the presence of dielectric 103 according to the invention does not impede the reading of the pattern drawn by the ink zones 107 under UV-A illumination. the optical component according to the invention is therefore compatible with the presence of such inks in a destination medium or in said optical component.
- the zones or patterns 201 correspond to the zones of the optical component for which the dielectric 103 has been removed locally and the zones or patterns 202 correspond to the zones of the optical component for which the dielectric 103 has been retained.
- the creation of a visible UV-C and / or UV-B pattern advantageously makes it possible not to disturbing the reading of said patterns 203 under UV-A illumination, and vice versa, that the patterns 203 visible under UV-A light do not disturb the reading of the visible patterns 201 under UV-C and / or UV-B illumination.
- the multilayer film further comprises a surface having an optically variable image, also called hologram or holographic image 205, i.e. a set of microstructured areas of the structural layer 102 designed to produce an optically visual effect.
- variable also known as DOVID (Diffractive Optical Variable Image Device) which in itself increases the security of the optical component.
- DOVID diffractive Optical Variable Image Device
- the DOVID commonly called “hologram” (not illustrated), observable in visible light, is generated thanks to a stamping of the structural layer 102 and is visible on the finished product only in the areas comprising a reflective layer (metal 105 or high optical index 103) that is to say in one of the zones 202.
- the network In the areas of the optical component where the layer 102 is in direct contact with the assembly 1040, the network is said to be "plugged” and the holographic image is no longer observable.
- the surface of the hologram and the pattern 201 visible in UV can be complementary (except if metal presence) to one another.
- the areas of soluble varnish 108 are deposited in register with the hologram.
- the soluble varnish 108 is slightly colored to facilitate positioning.
- the invention allows a perfect trimming of the hologram UV-C and / or UV-B by the generation of the hologram and the pattern 201 visible in UV during the same manufacturing process, which increases the level. security of the optical component.
- the lateral extension D2 of the hologram 205 is smaller than the lateral extension D1 of the structured zone of the structural layer 102 capable of carrying the said hologram.
- the ink 108 can be deposited partially on the structured zone of the layer 102 (FIG. 7A), which gives, after deposition of the dielectric layer 103 and disintegration of the ink 108, a hologram 205 whose contour is fluorescent (FIG. 7B) when it is illuminated by a UV-B or UV-C source, by the zones 201.
- steps can be provided to illuminate the document in visible light and to record the position of the hologram in a memory, illuminate the document in UV-C and / or UV-B and record the position of the pattern 201 in a memory, then compare the two images, in particular compare their position. dithering
- the protective layer 106 is deposited on the metal layer 105 selectively so as to create islands whose shape, the spacing between two adjacent islands and the dimensions are predetermined, which typically generates a dithering effect on the zones 202 comprising dielectric.
- the dielectric layer 103 is screened, that is to say selectively deposited so as to create islands whose shape, the spacing between two adjacent islands and the dimensions are predetermined, which allows to create tiny, non-significant areas of visible light that form a significant pattern under UV-B or UV-C illumination.
- the support layer 101 when it is not detachable from the optical component, the structurable layer 102, the reflective layer of dielectric 103 and the assembly 1040 of at least one layer comprising fluorescent pigments by UV excitation are preferably at least partially transparent in the visible, so that data carried by the document 300 can be recognized optically when the optical component is affixed to the document and that it is illuminated in the visible range.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Laminated Bodies (AREA)
- Optical Filters (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1550354A FR3031697B1 (fr) | 2015-01-16 | 2015-01-16 | Composant optique de securite. |
PCT/FR2016/050083 WO2016113517A1 (fr) | 2015-01-16 | 2016-01-15 | Composant optique de securite |
Publications (2)
Publication Number | Publication Date |
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EP3245074A1 true EP3245074A1 (de) | 2017-11-22 |
EP3245074B1 EP3245074B1 (de) | 2020-05-20 |
Family
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Application Number | Title | Priority Date | Filing Date |
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EP16705562.3A Active EP3245074B1 (de) | 2015-01-16 | 2016-01-15 | Ausweisdokument |
Country Status (8)
Country | Link |
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US (1) | US9962987B2 (de) |
EP (1) | EP3245074B1 (de) |
CN (1) | CN107405942B (de) |
BR (1) | BR112017015096B1 (de) |
FR (1) | FR3031697B1 (de) |
MX (1) | MX361360B (de) |
PH (1) | PH12017501286A1 (de) |
WO (1) | WO2016113517A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3031697B1 (fr) | 2015-01-16 | 2020-12-18 | Hologram Ind | Composant optique de securite. |
US10386848B2 (en) * | 2017-02-28 | 2019-08-20 | Blackberry Limited | Identifying a sensor in an autopilot vehicle |
US10539807B1 (en) * | 2017-10-16 | 2020-01-21 | SoliDDD Corp. | Ambient-light-visible, floating hologram display |
CN112572018B (zh) * | 2019-09-29 | 2022-06-14 | 中钞特种防伪科技有限公司 | 多层体光学防伪元件及其制作方法 |
CN110936751B (zh) * | 2019-12-18 | 2021-04-27 | 中国人民银行印制科学技术研究所 | 光学防伪元件、光学防伪产品以及光学防伪元件检测方法 |
CN113147216B (zh) * | 2021-05-24 | 2022-09-13 | 中钞印制技术研究院有限公司 | 光学防伪元件及其检测、制造方法和装置、安全物品 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5145212A (en) | 1988-02-12 | 1992-09-08 | American Banknote Holographics, Inc. | Non-continuous holograms, methods of making them and articles incorporating them |
US6638593B2 (en) * | 2000-06-30 | 2003-10-28 | Verification Technologies, Inc. | Copy-protected optical media and method of manufacture thereof |
WO2002002301A1 (en) * | 2000-06-30 | 2002-01-10 | Verification Technologies Inc. | Copy-protected optical media and method of manufacture thereof |
DE50114859D1 (de) | 2000-10-09 | 2009-06-04 | Hueck Folien Gmbh | Metallisierte folie und verfahren zu deren herstellung sowie deren anwendung |
US8262090B2 (en) * | 2001-12-13 | 2012-09-11 | The United States Playing Card Company | Method, apparatus and article for random sequence generation and playing card distribution |
DE102004021246A1 (de) * | 2004-04-30 | 2005-11-24 | Giesecke & Devrient Gmbh | Sicherheitselement und Verfahren zu seiner Herstellung |
RU2377133C2 (ru) * | 2004-04-30 | 2009-12-27 | Гизеке Унд Девриент Гмбх | Материал монтажной пленки и способы его изготовления |
JP2007072188A (ja) * | 2005-09-07 | 2007-03-22 | Dainippon Printing Co Ltd | ホログラム、ホログラムラベル及びホログラム転写箔 |
DE102006037431A1 (de) * | 2006-08-09 | 2008-04-17 | Ovd Kinegram Ag | Verfahren zur Herstellung eines Mehrschichtkörpers sowie Mehrschichtkörper |
US9834660B2 (en) | 2007-06-28 | 2017-12-05 | Honeywell International Inc. | Rare earth metal complexes that excite in the long UV wavelength range |
JP2010139910A (ja) * | 2008-12-15 | 2010-06-24 | Dainippon Printing Co Ltd | ホログラム構造 |
CA2656506A1 (en) * | 2009-02-27 | 2010-08-27 | Bank Of Canada | Security device |
US8901517B2 (en) * | 2012-06-29 | 2014-12-02 | Xerox Corporation | Fluorescent security phase change ink |
IN2015DN01013A (de) | 2012-09-28 | 2015-06-26 | Sicpa Holding Sa | |
US9334439B2 (en) * | 2013-03-15 | 2016-05-10 | Transitions Optical, Inc. | Photochromic articles that include photochromic-dichroic materials |
US9726910B2 (en) * | 2013-07-12 | 2017-08-08 | Photoprotective Technologies Incorporated | Phototherapeutic near IR fluorescent light filters |
FR3031697B1 (fr) | 2015-01-16 | 2020-12-18 | Hologram Ind | Composant optique de securite. |
-
2015
- 2015-01-16 FR FR1550354A patent/FR3031697B1/fr not_active Expired - Fee Related
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2016
- 2016-01-15 WO PCT/FR2016/050083 patent/WO2016113517A1/fr active Application Filing
- 2016-01-15 MX MX2017009316A patent/MX361360B/es active IP Right Grant
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- 2016-01-15 BR BR112017015096-4A patent/BR112017015096B1/pt active IP Right Grant
- 2016-01-15 CN CN201680010266.1A patent/CN107405942B/zh active Active
- 2016-01-15 EP EP16705562.3A patent/EP3245074B1/de active Active
-
2017
- 2017-07-14 PH PH12017501286A patent/PH12017501286A1/en unknown
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Publication number | Publication date |
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WO2016113517A1 (fr) | 2016-07-21 |
US20180029402A1 (en) | 2018-02-01 |
MX361360B (es) | 2018-12-04 |
EP3245074B1 (de) | 2020-05-20 |
BR112017015096B1 (pt) | 2022-07-12 |
FR3031697B1 (fr) | 2020-12-18 |
CN107405942B (zh) | 2018-08-03 |
CN107405942A (zh) | 2017-11-28 |
PH12017501286A1 (en) | 2018-01-15 |
FR3031697A1 (fr) | 2016-07-22 |
US9962987B2 (en) | 2018-05-08 |
BR112017015096A2 (pt) | 2018-04-17 |
MX2017009316A (es) | 2017-12-11 |
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