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WO2001002192A1 - Article de securite comportant un filtre optique de diffracton - Google Patents

Article de securite comportant un filtre optique de diffracton Download PDF

Info

Publication number
WO2001002192A1
WO2001002192A1 PCT/AU2000/000723 AU0000723W WO0102192A1 WO 2001002192 A1 WO2001002192 A1 WO 2001002192A1 AU 0000723 W AU0000723 W AU 0000723W WO 0102192 A1 WO0102192 A1 WO 0102192A1
Authority
WO
WIPO (PCT)
Prior art keywords
zone
optic filter
security
diffractive
security article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/AU2000/000723
Other languages
English (en)
Inventor
Paul Zientek
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.)
Securency Pty Ltd
Original Assignee
Securency Pty Ltd
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 Securency Pty Ltd filed Critical Securency Pty Ltd
Priority to KR1020017016742A priority Critical patent/KR20020022729A/ko
Priority to AU55101/00A priority patent/AU5510100A/en
Priority to JP2001507657A priority patent/JP2003503759A/ja
Priority to CA002376463A priority patent/CA2376463A1/fr
Priority to EP00940019A priority patent/EP1240031A1/fr
Priority to NZ516254A priority patent/NZ516254A/en
Publication of WO2001002192A1 publication Critical patent/WO2001002192A1/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
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/203—Filters having holographic or diffractive elements
    • 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 generally to devices for authenticating various items which are subject to counterfeiting, and in particular to authenticating devices of this type which act to diffract incident light.
  • the invention is suitable for use with banknotes and other security documents such as credit cards, passports, security passes, etc., and it will be convenient to hereinafter describe the invention in relation to that exemplary application. It is to be appreciated, however, that the invention is not limited to use in this application.
  • security devices or features for security documents such as banknotes, travellers' cheques or the like have been proposed previously.
  • security devices and features include optically variable devices such as holograms and diffraction gratings, security threads or strips, micro-print, fine line or "filigree” patterns, moire inducing patterns and optically variable inks.
  • the present invention provides a security article comprising a transparent substrate bearing a diffractive optic filter comprising at least a first zone, wherein a first diffractive structure is formed in said first zone, said first diffractive structure being operative to discriminatingly project a first selected colour at a viewing angle by diffracting at least a first spectral component of polychromatic light transmitted through said first zone by at least an angle ⁇ from said viewing angle, said first colour forming at least part of a projected security image when said diffractive optic filter is viewed at said viewing angle.
  • the diffractive optic filter further comprises at least a second zone adjacent said first zone, and a second diffractive structure is formed in the second zone, said second diffractive structure being operative to discriminatingly project a second selected colour, visually discernible from the first selected colour, at said viewing angle by diffracting at least a second spectral component of polychromatic light transmitted through said second zone by at least said angle ⁇ from said viewing angle, said first and second colours together forming at least part of said projected security image.
  • the substrate is formed of transparent plastics material.
  • the transparent plastic substrate may comprise at least one film of transparent polymeric material.
  • An opacifying layer may be applied to at least a first surface of a substrate, said opacifying layer only partly covering said first surface of the substrate to leave at least said diffractive optic filter essentially uncovered.
  • the substrate may include an uncovered region at least partially surrounding said diffractive optic filter.
  • the security article may be a security document, such as a banknote.
  • the following description refers in more detail to the various features of the present invention. To facilitate an understanding of the invention, reference is made in the description to the accompanying drawings where the security article is illustrated in a preferred embodiment. It is to be understood that the security article of the present invention is not, however, limited to that preferred embodiment.
  • the security article of the present invention is not, however, limited to that preferred embodiment.
  • FIG. 1 is a plan view of a banknote in accordance with one embodiment of the invention.
  • Figure 2 is a schematic diagram illustrating the operation of the diffractive optic filter of the banknote of Figure 1 in the presence of incident polychromatic light;
  • Figure 3 is a schematic diagram illustrating the projection of a security image by the diffractive optic filter of the banknote of Figure 1.
  • the banknote 1 has a substantially planar structure and comprises a flexible sheet-like substrate 2 of transparent plastics material.
  • the substrate 2 is covered over most of its upper and lower surfaces by opacifying layers 3 and 4.
  • the opacifying layers are not applied over the entire surfaces of the sheet-like substrate 2, and thus leave a transparent portion 5 of the substrate which is at least partially uncovered by the opacifying layers 3 and 4.
  • This transparent, essentially uncovered portion 5 constitutes a "window" in the banknote through which light may be transmitted.
  • the substrate 2 of transparent plastics material is preferably formed from a transparent polymeric material which may be made from at least one biaxially oriented film.
  • the substrate may comprise a single layer film of polymeric material.
  • the substrate may comprise a laminate of two or more layers of transparent biaxially oriented polymeric film.
  • the opacifying layers 3 and 4 may comprise in one or more of a variety of opacifying inks which can be used in the printing of banknotes or security documents.
  • the layers of opacifying ink may comprise pigmented coatings comprising a pigment, such as titanium dioxide dispersed within a binder or carrier of heat activated cross-linkable polymeric material.
  • a substrate of transparent plastics material 2 may be sandwiched between opacifying layers of paper to which indicia is printed or otherwise applied.
  • banknote in Figure 1 Whilst the banknote in Figure 1 is shown as having opacifying layers applied to both upper and lower surfaces, in other embodiments of the invention, only one of the surfaces of the banknote may have an opacifying layer applied thereto.
  • the transparent substrate 2 bears a diffractive optic filter 6.
  • the diffractive optic filter may be incorporated into the surface of the substrate 2, or may be formed within a transfer foil structure that is later applied to the substrate 2.
  • the diffractive optic filter comprises a first zone 7, and, in this example, at least a second zone 8.
  • a diffractive structure is formed in each of the first and second zones 7 and 8. More specifically, each region incorporates a transmissive diffractive structure, such as a diffraction grating, formed as a microscopic 3-D relief pattern.
  • the grating structures of both the first diffractive structure formed in the first zone 7 and the second diffractive structure formed in the second zone 8 have profiles and line spacings, or a periodicity, chosen so as to diffract at least a first spectral component of polychromatic light transmitted through the transmissive diffractive structure by a given angle ⁇ .
  • the characteristics of each of the diffractive structures in the two zones 7 and 8 are chosen so that different spectral components of the polychromatic light transmitted by each through the window in the banknote 1 are diffracted, so that the remaining undiffracted spectral component projected by each of the diffractive structures produces visually discernible colours which together form a projected security image.
  • each of the diffractive structures in the first and second zones 7 and 8 may be chosen to precisely define that spectral component of the polychromatic light which is to be diffracted.
  • the embodiment of the security article shown in Figure 1 includes a diffractive optic filter having two zones, each of which includes a different diffractive structure, in other embodiments of the invention only one such zone having a single diffractive structure may be used. Similarly, three or more zones, each having a separate diffractive structure, may be incorporated in other embodiments.
  • FIGs 2 and 3 shown one example in which the authenticity of the banknote 1 may be verified by a user.
  • a user may place the banknote 1 directly in front of an appropriate polychromatic light source.
  • the banknote 1, containing the diffractive optic filter in the clear window 5 thereof may be placed against a video display terminal (VDT) screen 10.
  • the VDT screen contains an array of red, green and blue (RGB) pixels, which respectively transmit a red, green and blue spectral component of the polychromatic light emitted from the screen.
  • RGB red, green and blue
  • a different polychromatic light source may be used, such as a broad flat white light source such as a fluorescent light box.
  • the light source used will cover an area which is larger than the area of the diffractive optic filter, and will produce light that can be separated into at least two spectral components.
  • the banknote 1 itself may also act as the polychromatic light source.
  • the banknote 1 may be folded so that a multi-coloured surface is superposed with the clear window 5. Ambient light may then be reflected from the multi-coloured surface of the banknote 1 and transmitted through the diffractive optic filter 6 in the clear window 5.
  • the light emanating from the light source 10 passes outwards towards a user 11 situated at a viewing angle from the banknote 1, in this case perpendicular to the plane of the banknote.
  • the first diffractive structure formed in the first zone 7 of the diffractive optic filter 5 acts to diffract the red and green spectral components of the polychromatic light transmitted through the substrate 2 of the banknote 1, and then through the first zone 7.
  • the characteristics of the first diffractive structure are chosen such that the red and green spectral components are diverted by at least an angle ⁇ similarly
  • the second diffractive structure formed in the second zone 8 of the diffractive optic filter 6 acts to diffract the green and blue spectral components of the polychromatic light emitted from the VDT screen 10 by at least the angle ⁇ .
  • the colours transmitted by each of the zones of the diffractive optic filter 6 may be chosen so that each transmits a colour which is visually discernible from the colours in each of the other zones.
  • the colours from the various zones of the diffractive optic filter combine to form at least part of a projected security (schematically represented in Figures 1, 2 and 3 in the form of an "S").
  • the angle ⁇ by which the different spectral components of polychromatic light are diffracted by each of the first and second diffractive structures, should be chosen so that the diffracted spectral components are diverted outside of the users field of view 12.
  • an uncovered zone 13 may be left around at least part of the diffractive optic filter 6 in the window 5, this uncovered portion 13 allowing all spectral components of the polychromatic light emitted from VDT screen 10 to be transmitted to the user 11. This enables the user 11 to more easily distinguish between the unfiltered light transmitted through the uncovered portion 13 and that transmitted through the diffractive optic filter 6.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Accounting & Taxation (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Finance (AREA)
  • Manufacturing & Machinery (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Credit Cards Or The Like (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Holo Graphy (AREA)

Abstract

L'invention concerne un article de sécurité tel qu'un billet de banque, une carte de crédit, un passeport, un laissez-passer de sécurité, etc. comportant un substrat de plastique transparent (12) pourvu d'un filtre optique de diffraction (16) comprenant au moins une première zone (7) et une seconde zone (8) comprenant une première et une seconde structure ou réseau de diffraction. La première structure de diffraction sert à projeter de manière discriminante une première couleur choisie à un angle de visualisation en faisant subir une diffraction à au moins un premier composant spectral (par exemple, rouge et vert) de lumière polychromatique transmise par une première zone selon au moins un angle υ par rapport à l'angle de visualisation, ladite première couleur faisant au moins partie d'une image de sécurité projetée lorsque ledit filtre optique de diffraction est visualisé selon l'angle.
PCT/AU2000/000723 1999-06-30 2000-06-26 Article de securite comportant un filtre optique de diffracton Ceased WO2001002192A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1020017016742A KR20020022729A (ko) 1999-06-30 2000-06-26 광 회절 필터를 포함하는 보안물품
AU55101/00A AU5510100A (en) 1999-06-30 2000-06-26 Security article including diffractive optic filter
JP2001507657A JP2003503759A (ja) 1999-06-30 2000-06-26 回折光学フィルタを含むセキュリティ物品
CA002376463A CA2376463A1 (fr) 1999-06-30 2000-06-26 Article de securite comportant un filtre optique de diffracton
EP00940019A EP1240031A1 (fr) 1999-06-30 2000-06-26 Article de securite comportant un filtre optique de diffracton
NZ516254A NZ516254A (en) 1999-06-30 2000-06-26 Security article including diffractive optic filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ1288A AUPQ128899A0 (en) 1999-06-30 1999-06-30 Security article including diffractive optic filter
AUPQ1288 1999-06-30

Publications (1)

Publication Number Publication Date
WO2001002192A1 true WO2001002192A1 (fr) 2001-01-11

Family

ID=3815477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2000/000723 Ceased WO2001002192A1 (fr) 1999-06-30 2000-06-26 Article de securite comportant un filtre optique de diffracton

Country Status (9)

Country Link
EP (1) EP1240031A1 (fr)
JP (1) JP2003503759A (fr)
KR (1) KR20020022729A (fr)
CN (1) CN1359340A (fr)
AU (1) AUPQ128899A0 (fr)
CA (1) CA2376463A1 (fr)
NZ (1) NZ516254A (fr)
TW (1) TW567146B (fr)
WO (1) WO2001002192A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7052762B2 (en) 2001-05-24 2006-05-30 3M Innovative Properties Company Low Tg multilayer optical films
WO2006133512A1 (fr) * 2005-06-17 2006-12-21 Securency Pty Limited Documents de sécurité incorporant des encres à variation chromatique
WO2008003949A1 (fr) 2006-07-04 2008-01-10 De La Rue International Limited Dispositif de sécurité
US7655296B2 (en) 2003-04-10 2010-02-02 3M Innovative Properties Company Ink-receptive foam article
US7820282B2 (en) 2003-04-10 2010-10-26 3M Innovative Properties Company Foam security substrate
AU2006257720B2 (en) * 2005-06-17 2010-12-02 Securency International Pty Ltd Security documents incorporating colour shifting inks
DE202010008331U1 (de) 2010-08-23 2011-11-29 Tremco Illbruck Produktion Gmbh Schaumstoff-Dichtstreifen
CN102542313A (zh) * 2012-01-05 2012-07-04 苏州大学 一种双通道光栅结构、识别结构及卡证的识别方法
WO2013178349A1 (fr) * 2012-06-01 2013-12-05 Giesecke & Devrient Gmbh Vérification de documents de valeur avec une fenêtre ayant des structures diffractives
WO2014033324A3 (fr) * 2012-09-03 2014-04-24 Ovd Kinegram Ag Élément de sécurité et document de sécurité

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10206357A1 (de) * 2002-02-14 2003-08-28 Giesecke & Devrient Gmbh Sicherheitselement und Sicherheitsdokument mit einem solchen Sicherheitselement
DE10254500B4 (de) * 2002-11-22 2006-03-16 Ovd Kinegram Ag Optisch variables Element und dessen Verwendung
DE102004003984A1 (de) * 2004-01-26 2005-08-11 Giesecke & Devrient Gmbh Gitterbild mit einem oder mehreren Gitterfeldern
CN106457875B (zh) * 2014-05-16 2019-10-25 尤尼卡技术股份有限公司 具有可个性化的真实性特征的数据载体
CN107633596A (zh) * 2017-08-14 2018-01-26 深圳怡化电脑股份有限公司 一种识别银行卡的方法、装置及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000659A1 (fr) * 1981-08-24 1983-03-03 Solomon, David, Henry Amelioration aux billets de banque et autres
WO1995016574A1 (fr) * 1993-12-18 1995-06-22 Leonhard Kurz Gmbh & Co. Element optique de securite visuellement identifiable pour papiers-valeurs
GB2296785A (en) * 1995-01-07 1996-07-10 Debden Security Printing Ltd A method of forming a composite image and a photosensitive material for use therein
WO1998023979A1 (fr) * 1996-11-26 1998-06-04 Commonwealth Scientific And Industrial Research Organisation Dispositif diffractif d'image en couleurs
US5876068A (en) * 1988-03-04 1999-03-02 Gao Gessellschaft Fur Automation Und Organisation Gmbh Security element in the form of a thread or strip to be embedded in security documents and methods of producing it

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983000659A1 (fr) * 1981-08-24 1983-03-03 Solomon, David, Henry Amelioration aux billets de banque et autres
US5876068A (en) * 1988-03-04 1999-03-02 Gao Gessellschaft Fur Automation Und Organisation Gmbh Security element in the form of a thread or strip to be embedded in security documents and methods of producing it
WO1995016574A1 (fr) * 1993-12-18 1995-06-22 Leonhard Kurz Gmbh & Co. Element optique de securite visuellement identifiable pour papiers-valeurs
GB2296785A (en) * 1995-01-07 1996-07-10 Debden Security Printing Ltd A method of forming a composite image and a photosensitive material for use therein
WO1998023979A1 (fr) * 1996-11-26 1998-06-04 Commonwealth Scientific And Industrial Research Organisation Dispositif diffractif d'image en couleurs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class P76, AN 1995-231435/30 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7052762B2 (en) 2001-05-24 2006-05-30 3M Innovative Properties Company Low Tg multilayer optical films
US7655296B2 (en) 2003-04-10 2010-02-02 3M Innovative Properties Company Ink-receptive foam article
US7820282B2 (en) 2003-04-10 2010-10-26 3M Innovative Properties Company Foam security substrate
AU2006257720B2 (en) * 2005-06-17 2010-12-02 Securency International Pty Ltd Security documents incorporating colour shifting inks
WO2006133512A1 (fr) * 2005-06-17 2006-12-21 Securency Pty Limited Documents de sécurité incorporant des encres à variation chromatique
GB2441261A (en) * 2005-06-17 2008-02-27 Securency Pty Ltd Security documents incorporating colour shifting inks
GB2441261B (en) * 2005-06-17 2009-05-27 Securency Pty Ltd Security documents incorporating colour shifting inks
US8696032B2 (en) 2006-07-04 2014-04-15 De La Rue International Limited Security device
WO2008003949A1 (fr) 2006-07-04 2008-01-10 De La Rue International Limited Dispositif de sécurité
DE202010008331U1 (de) 2010-08-23 2011-11-29 Tremco Illbruck Produktion Gmbh Schaumstoff-Dichtstreifen
EP2423397A2 (fr) 2010-08-23 2012-02-29 Tremco illbruck Produktion GmbH Bande d'étanchéité en mousse
CN102542313A (zh) * 2012-01-05 2012-07-04 苏州大学 一种双通道光栅结构、识别结构及卡证的识别方法
WO2013178349A1 (fr) * 2012-06-01 2013-12-05 Giesecke & Devrient Gmbh Vérification de documents de valeur avec une fenêtre ayant des structures diffractives
WO2014033324A3 (fr) * 2012-09-03 2014-04-24 Ovd Kinegram Ag Élément de sécurité et document de sécurité
AU2013310859B2 (en) * 2012-09-03 2017-08-31 Ovd Kinegram Ag Security element and security document
EP2892729B1 (fr) 2012-09-03 2018-03-21 OVD Kinegram AG Élément de sécurité et document de sécurité
US10112430B2 (en) 2012-09-03 2018-10-30 Ovd Kinegram Ag Security element and security document
AU2013310859C1 (en) * 2012-09-03 2019-01-03 Ovd Kinegram Ag Security element and security document

Also Published As

Publication number Publication date
AUPQ128899A0 (en) 1999-07-22
TW567146B (en) 2003-12-21
KR20020022729A (ko) 2002-03-27
EP1240031A1 (fr) 2002-09-18
CN1359340A (zh) 2002-07-17
JP2003503759A (ja) 2003-01-28
NZ516254A (en) 2002-05-31
CA2376463A1 (fr) 2001-01-11

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