CA2319137A1 - Planar patterns with superimposed diffraction grating - Google Patents

Planar patterns with superimposed diffraction grating Download PDF

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Publication number
CA2319137A1
CA2319137A1 CA002319137A CA2319137A CA2319137A1 CA 2319137 A1 CA2319137 A1 CA 2319137A1 CA 002319137 A CA002319137 A CA 002319137A CA 2319137 A CA2319137 A CA 2319137A CA 2319137 A1 CA2319137 A1 CA 2319137A1
Authority
CA
Canada
Prior art keywords
diffraction grating
visible light
pattern
microscopically fine
relief structures
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
Application number
CA002319137A
Other languages
French (fr)
Other versions
CA2319137C (en
Inventor
Rene Staub
Wayne Robert Tompkin
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.)
OVD Kinegram AG
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2319137A1 publication Critical patent/CA2319137A1/en
Application granted granted Critical
Publication of CA2319137C publication Critical patent/CA2319137C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1842—Gratings for image generation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/08—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
    • G06K19/10—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards
    • G06K19/16—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means at least one kind of marking being used for authentication, e.g. of credit or identity cards the marking being a hologram or diffraction grating
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Credit Cards Or The Like (AREA)
  • Optical Integrated Circuits (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Laminated Bodies (AREA)

Abstract

A surface pattern (1) is composed of elements (2 to 5) which are arranged in a mosaic-like fashion and of which at least one pattern is formed from a background element (4) and a pixel (2) with microscopically fine relief structures diffracting visible light. The surface elements (3) and the element portions (5) either contain the microscopically fine relief structures diffracting visible light or they comprise reflecting or scattering surfaces. Arranged in the pixel (2) is a first diffraction grating B1 and arranged in the background element (4) is a second diffraction grating B2, wherein the first diffraction grating B1 and the second diffraction grating B2 are a superimposition of at least two different, microscopically fine relief structures F1 and F2 diffracting visible light. The first diffraction grating and the second diffraction grating B2 differ only by virtue of a relative phase shift .DELTA..phi. between the relief structure F1 and the relief structure F2. Upon illumination with polychromatic light the pattern is of a single color which has brightness differences in zones involving different values of the phase shift .DELTA..phi..
CA002319137A 1998-01-27 1999-01-21 Planar patterns with superimposed diffraction grating Expired - Fee Related CA2319137C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH00191/98A CH693316A5 (en) 1998-01-27 1998-01-27 Surface patterns with superimposed diffraction gratings.
CH191/98 1998-01-27
PCT/EP1999/000388 WO1999038039A1 (en) 1998-01-27 1999-01-21 Planar patterns with superimposed diffraction grating

Publications (2)

Publication Number Publication Date
CA2319137A1 true CA2319137A1 (en) 1999-07-29
CA2319137C CA2319137C (en) 2003-09-23

Family

ID=4181330

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002319137A Expired - Fee Related CA2319137C (en) 1998-01-27 1999-01-21 Planar patterns with superimposed diffraction grating

Country Status (8)

Country Link
EP (1) EP1051648B1 (en)
AT (1) ATE237145T1 (en)
CA (1) CA2319137C (en)
CH (1) CH693316A5 (en)
DE (1) DE59904949D1 (en)
ES (1) ES2197612T3 (en)
HK (1) HK1029180A1 (en)
WO (1) WO1999038039A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144617B2 (en) * 2001-06-08 2006-12-05 Ovd Kinegram Ag Diffractive security element

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9929752D0 (en) 1999-12-17 2000-02-09 Secr Defence Textured surface
CN1265216C (en) * 2000-04-15 2006-07-19 Ovd基尼格拉姆股份公司 Pattern
DE10129938B4 (en) 2001-06-20 2005-05-25 Ovd Kinegram Ag As an authenticity feature on a document arranged optically variable surface pattern
DE10216563B4 (en) * 2002-04-05 2016-08-04 Ovd Kinegram Ag Security element as photocopy protection
DE102004003984A1 (en) † 2004-01-26 2005-08-11 Giesecke & Devrient Gmbh Lattice image with one or more grid fields

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4155627A (en) * 1976-02-02 1979-05-22 Rca Corporation Color diffractive subtractive filter master recording comprising a plurality of superposed two-level relief patterns on the surface of a substrate
EP0876629B1 (en) * 1996-01-26 2002-08-14 OVD Kinegram AG Surface pattern

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7144617B2 (en) * 2001-06-08 2006-12-05 Ovd Kinegram Ag Diffractive security element

Also Published As

Publication number Publication date
HK1029180A1 (en) 2001-03-23
DE59904949D1 (en) 2003-05-15
CA2319137C (en) 2003-09-23
WO1999038039A1 (en) 1999-07-29
EP1051648A1 (en) 2000-11-15
EP1051648B1 (en) 2003-04-09
CH693316A5 (en) 2003-05-30
ES2197612T3 (en) 2004-01-01
ATE237145T1 (en) 2003-04-15

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