GB2550821A - Diffractive optical element including two selectable images - Google Patents

Diffractive optical element including two selectable images

Info

Publication number
GB2550821A
GB2550821A GB1714212.6A GB201714212A GB2550821A GB 2550821 A GB2550821 A GB 2550821A GB 201714212 A GB201714212 A GB 201714212A GB 2550821 A GB2550821 A GB 2550821A
Authority
GB
United Kingdom
Prior art keywords
optical element
diffractive optical
grating
depth
element including
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.)
Pending
Application number
GB1714212.6A
Other versions
GB201714212D0 (en
Inventor
Hardwick Michael
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.)
CCL Security Pty Ltd
Original Assignee
CCL Security 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
Priority claimed from AU2015901119A external-priority patent/AU2015901119A0/en
Priority claimed from AU2015100392A external-priority patent/AU2015100392B4/en
Application filed by CCL Security Pty Ltd filed Critical CCL Security Pty Ltd
Publication of GB201714212D0 publication Critical patent/GB201714212D0/en
Publication of GB2550821A publication Critical patent/GB2550821A/en
Pending 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
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/364—Liquid crystals
    • 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
    • B42D25/391—Special inks absorbing or reflecting polarised 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
    • B42D25/425—Marking by deformation, e.g. embossing
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1814—Diffraction gratings structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings
    • G02B5/1819—Plural gratings positioned on the same surface, e.g. array of gratings
    • G02B5/1823—Plural gratings positioned on the same surface, e.g. array of gratings in an overlapping or superposed manner
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1833—Diffraction gratings comprising birefringent materials
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/003—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using security elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Finance (AREA)
  • Business, Economics & Management (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Accounting & Taxation (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Security & Cryptography (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

An optical device including a numerical-type diffractive optical element (DOE) and a birefringent layer, the DOE including a grating including a first grating region associated with a first image and a second grating region associated with a second image, wherein the first grating region includes grating elements with a first depth and wherein the second grating region includes grating elements with a second depth, such that the first depth is selected based on a first refractive index of the birefringent layer and wherein the second depth is selected based on a second refractive index of the birefringent layer.
GB1714212.6A 2015-03-27 2016-03-24 Diffractive optical element including two selectable images Pending GB2550821A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2015901119A AU2015901119A0 (en) 2015-03-27 Diffractive Optical Element Including Two Selectable Images
AU2015100392A AU2015100392B4 (en) 2015-03-27 2015-03-27 Diffractive Optical Element Including Two Selectable Images
PCT/AU2016/050221 WO2016154668A1 (en) 2015-03-27 2016-03-24 Diffractive optical element including two selectable images

Publications (2)

Publication Number Publication Date
GB201714212D0 GB201714212D0 (en) 2017-10-18
GB2550821A true GB2550821A (en) 2017-11-29

Family

ID=57003729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1714212.6A Pending GB2550821A (en) 2015-03-27 2016-03-24 Diffractive optical element including two selectable images

Country Status (4)

Country Link
AU (1) AU2016240395A1 (en)
GB (1) GB2550821A (en)
MX (1) MX2017012382A (en)
WO (1) WO2016154668A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201711097D0 (en) 2017-07-10 2017-08-23 Univ Court Univ St Andrews Laser device
WO2019226351A1 (en) 2018-05-23 2019-11-28 Dow Global Technologies Llc Anhydrous autodish formulation
CN111716938B (en) * 2019-03-19 2021-04-27 中钞特种防伪科技有限公司 Optical anti-counterfeiting element and optical anti-counterfeiting product
FR3105088B1 (en) * 2019-12-20 2021-12-24 Oberthur Fiduciaire Sas Optical structure with relief effect

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070273143A1 (en) * 2006-05-12 2007-11-29 Crane Timothy T Micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images
JP2008100421A (en) * 2006-10-19 2008-05-01 Toppan Printing Co Ltd Security device, its verifying method, and printed matter
US20080280107A1 (en) * 2004-04-17 2008-11-13 Leonhard Kurz Gmbh & Co. Kg Film Comprising a Polymer Layer
WO2013166561A1 (en) * 2012-05-10 2013-11-14 Innovia Security Pty Ltd Optical security device producing different images in reflection and transmission
AU2014100511A4 (en) * 2014-05-16 2014-06-26 Ccl Secure Pty Ltd Hybrid security device for security document or token
WO2014127403A1 (en) * 2013-02-19 2014-08-28 Innovia Security Pty Ltd Security device with covert images

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080280107A1 (en) * 2004-04-17 2008-11-13 Leonhard Kurz Gmbh & Co. Kg Film Comprising a Polymer Layer
US20070273143A1 (en) * 2006-05-12 2007-11-29 Crane Timothy T Micro-optic film structure that alone or together with a security document or label projects images spatially coordinated with static images and/or other projected images
JP2008100421A (en) * 2006-10-19 2008-05-01 Toppan Printing Co Ltd Security device, its verifying method, and printed matter
WO2013166561A1 (en) * 2012-05-10 2013-11-14 Innovia Security Pty Ltd Optical security device producing different images in reflection and transmission
WO2014127403A1 (en) * 2013-02-19 2014-08-28 Innovia Security Pty Ltd Security device with covert images
AU2014100511A4 (en) * 2014-05-16 2014-06-26 Ccl Secure Pty Ltd Hybrid security device for security document or token

Also Published As

Publication number Publication date
GB201714212D0 (en) 2017-10-18
AU2016240395A1 (en) 2017-10-26
MX2017012382A (en) 2017-12-14
WO2016154668A1 (en) 2016-10-06

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