[go: up one dir, main page]

WO2019182447A1 - Document de sécurité à réseau de lentilles semi-cylindriques parallèles - Google Patents

Document de sécurité à réseau de lentilles semi-cylindriques parallèles Download PDF

Info

Publication number
WO2019182447A1
WO2019182447A1 PCT/NL2019/050177 NL2019050177W WO2019182447A1 WO 2019182447 A1 WO2019182447 A1 WO 2019182447A1 NL 2019050177 W NL2019050177 W NL 2019050177W WO 2019182447 A1 WO2019182447 A1 WO 2019182447A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
array
lens
transparent body
semi
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.)
Ceased
Application number
PCT/NL2019/050177
Other languages
English (en)
Inventor
Ronald Rene TEN VELDEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemia The Netherlands BV
Original Assignee
Idemia The Netherlands BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Idemia The Netherlands BV filed Critical Idemia The Netherlands BV
Publication of WO2019182447A1 publication Critical patent/WO2019182447A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/342—Moiré effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials

Definitions

  • the present invention relates to a security document comprising a substrate and a security element provided on the substrate, wherein the substrate and security element thereon together have a thickness of 500 micrometer or more, the security element comprising a coating adapted for providing a viewing angle dependent color-shifting effect, wherein a substantially transparent body of a plastic material is provided at a view side of the coating and comprises an array of parallel semi-cylindrical lenses which form a lenticular lens.
  • the width and length dimensions of the security document typically conform to those of a so called ID-1 , ID-2 or ID-3 card as defined in the ISO/IEC 7810 specification of 2003.
  • the document may be protected with a Basic Access Control and Secure Messaging (“BAC”) as defined in ICAO document ICAO9303 from 2015, and/or may be configured to comply with ISO/IEC 18013-3 using Basic Access Protocol (“BAP”).
  • BAC Basic Access Control and Secure Messaging
  • BAP Basic Access Protocol
  • the security document according to the invention preferably is one of a passport, a government issued document or a driver’s license, or part thereof.
  • the invention further relates to a security element to be applied on a substrate of a security document, and to a method of applying a security element to a substrate of a security document.
  • US 2008/0191463 describes a composition comprising a transparent or semitransparent support and a layer comprising lenticular or linear Fresnel lenses on top of which a transparent or semi-transparent body with high refractive index (HRI), i.e. having a refractive index at least 0.1 higher than that of the layer with the lenticular or linear Fresnel lenses, is provided without destroying the effect of the lenticular or linear Fresnel lenses.
  • the lenticular lenses may be extruded in a production direction or embossed on the transparent or semi-transparent support.
  • different types of functional layers such as anti-scratch or conductive layers can be applied.
  • the known composition was developed in view of the use of lenticular/linear Fresnel lenses to improve the security of an official security document such a PVC ID-card, a credit card or money (paper and plastic type).
  • an observer can determine the authenticity of such a security document is highly dependent on a change in viewing angle of the observer to the security document, and for certain viewing angles the observer may be unable to determine the document’s authenticity at all.
  • the present invention provides a security document comprising a substrate and a security element provided on the substrate, the security element comprising: a coating arranged on the substrate and adapted for providing a viewing angle dependent color-shifting effect; a substantially transparent body of a plastic material arranged such that the coating is located between the substrate and the transparent body and can be viewed through the transparent body, wherein the security document, along a line normal to the substrate and which extends through the coating, the substantially transparent body and the substrate, has a thickness of at least 500 micrometer; wherein the transparent body comprises a first lens portion with a first array of parallel semi-cylindrical lenses through which a first portion of the coating can be viewed, and a second lens portion with a second array of parallel semi-cylindrical lenses through which a second portion of the coating can be viewed, wherein the second array is angularly offset with respect to the first array; and wherein the semi-cylindrical lenses of the first and second array have a focal
  • the lenses of the first and second lens portion are at an angle to each other, i.e. nonparallel to each other, two different color-shifting effects of the coating may be visible to an observer at the same time through the lens portions. It is therefore unnecessary for the observer to change the viewing angle, i.e. the angle between the observer’s eyes and the document, to see the color- shifting effect of the coating when both the first and second lens portion are in his field of view. In case the observer does change the viewing angle, he may determine the authenticity of the security document based on the color-shifting effect observed through the first lens array and/or through the second lens array as the viewing angle is changed.
  • the thickness of the document in the vicinity of the coating helps prevent fold lines from occurring in the coating and in particular in the transparent body. Such fold lines would influence the transparency of the transparent body, e.g. by causing it to be opaque along the fold lines and obscuring the coating.
  • fold lines in card-shaped substrates of a security document should be generally avoided, in particular if the security document is to have predictable dimensions and/or comprises an electrical circuit.
  • the substantially transparent body preferably is arranged on the coating and more preferably extends over the entire coating and a portion of the substrate directly adjacent to the coating.
  • the transparent body may extend such that, when seen in projection onto the substrate, it covers substantially the entire substrate.
  • the semi-cylindrical lenses of the first array have a first focal plane and the semi-cylindrical lenses of the second array have a second focal plane, wherein said first and second focal planes extend within a common plane that coincides with the coating.
  • the surface of the coating facing the transparent body is substantially located within the common plane.
  • the coating preferably has a substantially constant thickness. This allows the complete first and second coating portions to be applied to the substrate in a same coating deposition step.
  • the semi-cylindrical lenses of the first array have a first focal plane and the semi-cylindrical lenses of the second array have a second focal plane, wherein the first portion of the coating is located within the first focal plane, and wherein the second portion of the coating is located within the second focal plane different from the first focal plane. Due to the differences in focal planes, different color-shifting effects are provided. Two portions of a same coating may lie in different focal planes, for instance when the first portion of the coating has thickness that is different from a thickness of the second portion of the coating. Alternatively, when the first and second portion of the coating lie in different planes, they may be connected to each other via an intermediate coating portion.
  • the coating is contiguous and preferably has a convex shape.
  • the transparent body which comprises the lens portions preferably is also formed as a contiguous body, though it may comprise multiple transparent bodies stacked on top of each other.
  • the first focal plane and the second focal plane preferably are parallel to each other.
  • the focal length of the first array of semi-cylindrical lenses differs from the focal length of the second array of semi-cylindrical lenses by at least 50 micrometer.
  • the lenses of the first array may have a focal length of 300 micrometer, whereas the lenses of the second array may have a focal length 370 micrometer.
  • the first array of semi-cylindrical lenses and the second array of semi- cylindrical lenses at least partly abut each other.
  • the first and second array close to each other, simultaneous observation of the color-shifting effect through the two lens portions is facilitated.
  • a security document according to this embodiment is difficult to counterfeit using standard available lenticular lenses.
  • the transparent body further comprises one or more further lens portions, each of said further lens portions comprising an array of parallel semi-cylindrical lenses which is angularly offset with respect to first and second array of semi-cylindrical lenses.
  • the transparent body may be provided with third, fourth and/or fifth lens portions.
  • the array of parallel semi-cylindrical lenses of each of the lens portions is at an angle to the arrays of lenses of all the other lens portions in the transparent body.
  • the first, second and one or more further lens portions together enclose a convex polygon, such as a triangle.
  • the substantially transparent body further comprises one or more lens- free portions adjacent, preferably directly adjacent, to the first and/or second lens portion, wherein the one or more lens-free portions are substantially transparent and free from lenticular lenses.
  • the coating can be viewed by an observer through the one or more lens-free portions. The color-shifting effect of the coating can thus be viewed through these lens- free portions without being enhanced by lenticular lenses.
  • at least one of the one or more lens-free portions is a contiguous portion which surrounds the first and second portions, that lens- free portion provides some protection against damage to the first and second lens portions along the edges of these lens portions.
  • at least one of these lens-free portions is arranged in a convex polygon that is enclosed by the first, second and one or more further lens portions.
  • the substantially transparent body further comprises a portion with an array of concentric semi-cylindrical lenticular lenses.
  • These concentric lenses which preferably are substantially circular when seen in projection onto the substrate, provide a non-uniform color- shifting effect along the circumference of the lenses, i.e. within the portion of concentric lenses the coating may appear to an observer to have different colors.
  • the color-shifting effect for each array of parallel semi-cylindrical lenses is generally substantially uniform, i.e. within an array of parallel linear semi-cylindrical lenses the color of the coating viewed therethrough seems substantially the same.
  • first and second array are angularly offset to each other by an angle in the range of 10 to 80 degrees, preferably in the range of 30 to 60 degrees. This angle is defined as the smallest angle between two lines parallel to the respective arrays when projected onto the substrate.
  • the coating comprises one or more of: an optically variable ink, liquid crystals, dichroic ink, iridescent ink and/or interference pigments.
  • the observed color(s) of such a coating different within the visible light spectrum dependent on the viewing angle between the document and the observer.
  • visible light is defined as light having a wavelength within the range of 350 - 780 nanometer.
  • the security document is substantially rigid.
  • the security element has a bending stiffness greater than 25 N/m when measured according to ISO/IEC 10373 of 2006.
  • the bending modulus of the security document preferably is at least 2,3 GPa.
  • the semi-cylindrical lenses of the first and/or second array have a pitch in the range of between 30 and 300 micrometer.
  • the pitch is defined as centre-to-centre distance between adjacent ones of the parallel semi-cylindrical lenses.
  • the semi-cylindrical lenses of the first and/or second array have a thickness in the range of between 100 and 300 micrometer.
  • the substrate and the substantially transparent body are made from a same material, each preferably comprising or consisting of one or more layers of polycarbonate, PVC (polyvinylchloride), ABS (acrylonitrile butadiene styrene), polyester, polyamide, polyimide, acrylic materials, and/or another plastic from the group of thermoplastics or thermosetting polymers.
  • PVC polyvinylchloride
  • ABS acrylonitrile butadiene styrene
  • polyester polyamide
  • polyimide polyimide
  • acrylic materials and/or another plastic from the group of thermoplastics or thermosetting polymers.
  • the coating has an opacity of at least 30% for visible light, the opacity percentage preferably being defined according to ISO/IEC 10373 of 2006. More preferably, the coating has an opacity of at least 30% or at least 40%.
  • the substrate at least in an area of projection of the coating on the substrate, is substantially opaque to visible light.
  • the color-shifting effect of the coating is substantially invisible through the substrate.
  • the substrate, at least in said area of projection preferably has an opacity of at least 90%. This opacity may be determined in accordance with ISO/IEC 10373 of 2006.
  • the invention provides a security element for a substantially rigid security document, the security element comprising: a coating to be arranged on a substrate of the security document and adapted for providing a viewing angle dependent color-shifting effect; a substantially transparent body of a plastic material arranged at least partially on the coating such that the coating can be viewed through the transparent body; wherein the transparent body comprises a first lens portion with a first array of parallel semi-cylindrical lenses through which a first portion of the coating can be viewed, and a second lens portion with a second array of parallel semi-cylindrical lenses through which a second portion of the coating can be viewed, wherein the second array is angularly offset with respect to the first array; and wherein the semi-cylindrical lenses of the first and second array have a focal length of at least 80 micrometer, preferably at least 200 micrometer. It will be understood that those features of the security element described herein with reference to the first aspect of the invention may also be part of the security element.
  • the invention provides a method of applying a security element on a substrate of a security document, comprising the steps of:
  • a substantially transparent plastic body on the coating and on at least part of the substrate, such that the coating is located between the substrate and the transparent body and can be viewed through the transparent body, the security document, along a line normal to the substrate and which extends through the coating, the substantially transparent body and the substrate, having a thickness of at least 500 micrometer;
  • the resulting security document has at least two arrays of semi-cylindrical lenses which are at an angle to each other, enabling an observer to easily observe a color-shifting effect of the coating through the first and/or second lens portions.
  • the method results in a security document according to the first aspect of the invention.
  • step of applying the transparent body is performed prior to the step of providing the first and second lens portions in said transparent body. This avoids having to accurately align the transparent body on the substrate.
  • the step of providing the first and second lens portions in the transparent body comprises forming said first and second lens portions in said transparent body by pressing a die which comprises complementary shapes of the first and second lens portions into the body.
  • Fig. 1 A shows a top view of an ID-card provided with a security element, according to the invention
  • Figs. 1 B and 1 C show respective cross-sectional views of the ID-card of Fig. 1A along lines IB and IC,
  • Figs. 2A and 2B show respectively a top view and a cross-sectional view of an ID-card provided with a second embodiment of a security element according to the invention
  • Figs. 3A and 3B show respectively a top view and a cross-sectional view of an ID-card provided with a third embodiment of a security element according to the invention
  • Figs. 4A and 4B schematically illustrates different dimensional properties of a known semi- cylindrical lenticular lens, such as arc length, focal length, arc radius, gauge and width of the lens,
  • Figs. 5A-5C schematically show cross-sectional views of further variations of a security document according to the invention.
  • Figs. 1A, 1 B and 1 C respectively show a top view of a security document 1 , here an ID-1 card, provided with a security element 2 according to the invention, and a cross-sectional views along lines l-B and l-C of Fig. 1A.
  • the security element 2 is arranged on an opaque substrate 10 of the ID card 1 and is provided with a coating 12 comprising an optically variable ink (OVI) on a first side 1 1 of the substrate.
  • the coating provides a viewing-angle dependent color-shifting effect, i.e. the color of the coating as perceived by an observer depends on the viewing angle between the coating and the observer.
  • the coating may appear greenish to the observer, whereas at a viewing angle of 60 degrees to the plane in which the coating lies it may appear blueish instead.
  • the substrate 10 is opaque, the viewing angle dependent color-shifting effect of the coating 12 cannot readily be observed through the substrate 10.
  • the coating 12 is completely covered by a substantially transparent and contiguous body 20 of a plastic material which protects the coating while allowing it to be seen though the transparent body.
  • the transparent body 20 is formed as a single polycarbonate layer, though it may comprise (an)other or other plastic materials) as well, such as polyvinyl chloride, polyamide, polyimide and/or may comprise multiple layers of one or more transparent plastic materials.
  • the body 20 is provided with abutting lens portions 21 , 22, 23 which are formed as integral parts of the body. Each of these lens portions comprises a linear array of parallel semi-cylindrical lenses, and each of these arrays is arranged at an angle to the other arrays. For instance, in the top view of Fig.
  • lens portions 21 ,22,23 enclose a triangle, with angle a1 between the lenses of lens portions 21 ,22 being about 55 degrees, angle b1 between the lenses of lens portions 22,23 being about 90 degrees, and with angle y1 between the lenses of lens portions 23,21 being about 35 degrees.
  • the coating 12 is very thin, i.e. the coating is at least 10 times thinner than the total thickness H.
  • the transparent body 20 is thinner than the substrate 10.
  • the coating may have a thickness in the range of 15 to 50 micrometers, whereas the substrate may have a thickness in the range of 450 to 950 micrometers, and the transparent body may have a thickness in the range of 100 to 400 micrometers but in any case smaller than that of the substrate.
  • the substrate 10 has a thickness hi of about 600 micrometer
  • the coating 12 has a thickness h2 of about 30 micrometer
  • the transparent body, at the position of the lenses has a thickness of about 240 micrometer, which is substantially equal to the focal length of each of the semi-cylindrical lenses.
  • the total thickness H of the document at the position of the lenses thus is about 840 micrometer.
  • the ID-card 1 is planar and substantially rigid so that it is resistant to bending in a manner that would form sharp fold lines in the card. Thus, during regular the substrate and the security element thereon remain substantially planar, rather than being folded along a sharp folding line.
  • Figs. 1 B and 1 C further shown that the lens arrays of the respective lens portions 21 ,22,23 each have a corresponding focal plane P1 , P2, P3 which coincides with a side of coating 12 which faces the lens arrays.
  • the focal planes P1 ,P2,P3 thus extend in a common plane C.
  • Figs. 2A and 2B respectively show a top view of a second embodiment of a security document according to the invention, and a cross-sectional view thereof along line ll-B.
  • the security document again is an ID-1 card 1 , comprising substrate 10 on which a coating is 12 is provided on a first side 1 1 of the substrate.
  • a body 30 of a substantially transparent plastic covers the coating 12 and any portion of the first side 1 1 not covered by the coating.
  • the transparent body is provided with three lens portions 31 ,32,33 through each of which a corresponding portion of the coating can be viewed by an observer.
  • the lens portions which are formed integrally in the transparent body, are spaced apart from each other.
  • Each lens portion 31 ,32,33 lies, when seen in projection onto the substrate, completely within the area of the contiguous coating 12.
  • the parallel semi-cylindrical lenses of lens portion 31 extend at an angle a2 of about 40 degrees to the parallel cylindrical lenses of lens portion 32, and extend at an angle B2 of about 50 degrees to the cylindrical lenses of lens portion 33.
  • the lens arrays of lens portions 32 and 33 are at an angle y2 of about 90 degrees to each other, though in another embodiment these lens arrays could for instance be at an angle of about 80 degrees to each other.
  • Fig. 2B shows that the transparent body extends across the entire first side 1 1 of the substrate.
  • Fig. 3A shows a further embodiment according to the invention in which again like reference numerals refer to like structures as in Figs 1A-1 C and 2A,2B.
  • a transparent plastic body 40 is provided, which comprises lens portions 41 , 42, 43, 44, 45 which each have an array of parallel semi-cylindrical lenses extending at an angle to the other arrays of parallel semi- cylindrical lenses.
  • the lens portions 41 - 45 together enclose a pentagon, a portion of which is free from lenticular lenses.
  • a lens portion 46 comprising an array of circular concentric lenses.
  • the lenses of lens portion 46 also have substantially semi-cylindrical cross-sections, as can be seen in the cross- sectional view through line ll-B shown in Fig. 3B, but extend circumferentially rather than linearly. Thus, from substantially any angle of view in which an observer can view a portion of the coating through lens portion 46, he is likely to see a color-shifting effect.
  • Figs. 4A and 4B illustrate how several properties and dimensions of a lenticular lens, such as a semi-cylindrical lenticular lens, are generally defined in the art.
  • Fig. 4B shows a cross-section of a lenticular lens array 50 on top of a planar substrate 51 .
  • the lenticular lens array comprises a plurality of parallel of semi-cylindrical lenses, each having a same width w and a thickness g.
  • the thickness g sometimes also denoted gauge thickness, is the sum of the base thickness b and the crescent depth c.
  • each semi-cylindrical lens has a lens radius r which extends over an arc angle a.
  • each lens has a focal length f that is substantially equal to the gauge depth, though this is not necessarily always the case.
  • the definition of the dimensions and properties of the lenticular lens shown in Figs. 4A and 4B corresponds substantially to that of US 6,424,467.
  • Figs. 5A, 5B and 5C schematically show cross-sectional views of further variations of the present invention.
  • semi-cylindrical lenses of a first lens portion 61 ,71 ,81 extend at an angle of about 45 degrees to semi-cylindrical lenses of a second lens portion 62,72,82 in the respective corresponding transparent bodies 60,70,80.
  • Fig. 5A shows than that the lenses of the first lens portion 61 have a greater gauge thickness g1 and width than the lenses of the second lens portion 62. Consequently, the focal length of the lenses of the first lens portion 61 is larger than the focal length of the lenses of the second lens portion.
  • the first focal plane P1 of the first lens portion 61 and the second focal plane P2 of the second lens portion lie in a common plane C which substantially coincides with the top surface of the coating 12.
  • the coating 12, 12’ is a contiguous coating, which however has a greater thickness at portion 12 below the first lens portion 71 of transparent body 70 than at portion 12’ below second lens portion 72 of the body.
  • the gauge thicknesses of the lenses of the first lens portion and of the second lens portion are substantially equal, but the width of the lenses of the first lens portion is greater than the width of the lenses of the second lens portion.
  • the first focal plane P1 of the first lens portion 71 does not lie in a common plane with the second focal plane P2 of the second lens portion.
  • both the focal lengths and the focal planes of the first and second lens portions 71 , 72 differ.
  • Fig. 5C shows an embodiment in which lens portions 81 and 82 of transparent body 80 have substantially equal widths and gauge thicknesses, and have corresponding focal planes P1 , P2 which lie in a common plane C.
  • the lenses have substantially the same focal length.
  • the lens portions 81 ,82 may be provided in the transparent body 80 by pressing a die which comprises complementary shapes of the first and second lens portions into the transparent body after the transparent body has been applied over the coating 12.
  • the invention relates to a substantially rigid security document comprising a substrate and a security element provided on the substrate, comprising: a coating on the substrate and adapted for providing a viewing angle dependent color-shifting effect; a substantially transparent body of a plastic material arranged such that the coating is located between the substrate and the transparent body and can be viewed through the transparent body, the transparent body comprising a first lens portion with a first array of parallel semi-cylindrical lenses through which a first portion of the coating can be viewed, and a second lens portion with a second array of parallel semi-cylindrical lenses through which a second portion of the coating can be viewed, wherein the second array is angularly offset with respect to the first array.

Landscapes

  • Credit Cards Or The Like (AREA)

Abstract

L'invention concerne un document de sécurité sensiblement rigide comprenant un substrat et un élément de sécurité disposé sur le substrat, comprenant : un revêtement sur le substrat conçu pour fournir un effet de décalage de couleur dépendant de l'angle de visualisation ; un corps sensiblement transparent d'un matériau plastique agencé de sorte que le revêtement est situé entre le substrat et le corps transparent et peut être visualisé à travers le corps transparent, le corps transparent comprenant une première partie de lentille présentant un premier réseau de lentilles semi-cylindriques parallèles à travers lequel une première partie du revêtement peut être visualisée et une seconde partie de lentille présentant un second réseau de lentilles semi-cylindriques parallèles à travers lequel une seconde partie du revêtement peut être visualisée, le second réseau étant décalé angulairement par rapport au premier réseau.
PCT/NL2019/050177 2018-03-23 2019-03-21 Document de sécurité à réseau de lentilles semi-cylindriques parallèles Ceased WO2019182447A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2020650A NL2020650B1 (en) 2018-03-23 2018-03-23 Security document with array of parallel semi-cylindrical lenses
NL2020650 2018-03-23

Publications (1)

Publication Number Publication Date
WO2019182447A1 true WO2019182447A1 (fr) 2019-09-26

Family

ID=62528808

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2019/050177 Ceased WO2019182447A1 (fr) 2018-03-23 2019-03-21 Document de sécurité à réseau de lentilles semi-cylindriques parallèles

Country Status (2)

Country Link
NL (1) NL2020650B1 (fr)
WO (1) WO2019182447A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424467B1 (en) 2000-09-05 2002-07-23 National Graphics, Inc. High definition lenticular lens
US20080191463A1 (en) 2007-02-09 2008-08-14 Vermeulen Leon Louis Marie Lenticular Foils and Linear Fresnel Lenses
GB2454752A (en) * 2007-11-19 2009-05-20 Rue De Int Ltd Security devices
WO2011051669A1 (fr) * 2009-10-30 2011-05-05 De La Rue International Limited Dispositif de sécurité et son procédé de fabrication
WO2015011494A1 (fr) * 2013-07-26 2015-01-29 De La Rue International Limited Dispositif de sécurité et procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6424467B1 (en) 2000-09-05 2002-07-23 National Graphics, Inc. High definition lenticular lens
US20080191463A1 (en) 2007-02-09 2008-08-14 Vermeulen Leon Louis Marie Lenticular Foils and Linear Fresnel Lenses
GB2454752A (en) * 2007-11-19 2009-05-20 Rue De Int Ltd Security devices
WO2011051669A1 (fr) * 2009-10-30 2011-05-05 De La Rue International Limited Dispositif de sécurité et son procédé de fabrication
WO2015011494A1 (fr) * 2013-07-26 2015-01-29 De La Rue International Limited Dispositif de sécurité et procédé de fabrication

Also Published As

Publication number Publication date
NL2020650B1 (en) 2019-10-02

Similar Documents

Publication Publication Date Title
US11529822B2 (en) Micro-optic device with integrated focusing element and image element structure
US11016224B2 (en) Combination microlens optical device
EP2960690B1 (fr) Affichage ayant un effet anti-contrefaçon élevé
CN102958705B (zh) 具有集成安全器件的安全票据及其制造方法
JP7601151B2 (ja) 光学素子、および、認証体
US20180117950A1 (en) A security document or token
WO2019182050A1 (fr) Élément optique, feuille de transfert, objet d'authentification et procédé de vérification d'objet d'authentification
AU2015100575A4 (en) Security Device with Non-diffractive Switching Image
NL2020650B1 (en) Security document with array of parallel semi-cylindrical lenses
AU2015100670A4 (en) Combination microlens optical device
AU2015100387B4 (en) A Security Document or Token
AU2013100001B4 (en) Security device including a diffractive optical element and a filter
AU2013100685B4 (en) Optical device including vertical pixels
AU2017101252A4 (en) Hybrid optically variable moire device
WO2016183623A1 (fr) Microlentilles mises en forme
AU2015100643A4 (en) Shaped microlenses
AU2016102127B4 (en) Optically variable moire security device
KR20180005655A (ko) 0차 이미지를 포함하는 광학 디바이스
WO2014186837A1 (fr) Dispositif optique comprenant des pixels verticaux
HK1182997B (en) Security document with integrated security device and method of manufacture

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19719948

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19719948

Country of ref document: EP

Kind code of ref document: A1