CA2319137A1 - Planar patterns with superimposed diffraction grating - Google Patents
Planar patterns with superimposed diffraction grating Download PDFInfo
- 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
Links
- 230000010363 phase shift Effects 0.000 abstract 2
- 238000005286 illumination Methods 0.000 abstract 1
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..
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)
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)
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)
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 |
-
1998
- 1998-01-27 CH CH00191/98A patent/CH693316A5/en not_active IP Right Cessation
-
1999
- 1999-01-21 WO PCT/EP1999/000388 patent/WO1999038039A1/en active IP Right Grant
- 1999-01-21 EP EP99903666A patent/EP1051648B1/en not_active Expired - Lifetime
- 1999-01-21 ES ES99903666T patent/ES2197612T3/en not_active Expired - Lifetime
- 1999-01-21 CA CA002319137A patent/CA2319137C/en not_active Expired - Fee Related
- 1999-01-21 AT AT99903666T patent/ATE237145T1/en active
- 1999-01-21 DE DE59904949T patent/DE59904949D1/en not_active Expired - Lifetime
-
2000
- 2000-12-28 HK HK00108484A patent/HK1029180A1/en not_active IP Right Cessation
Cited By (1)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |