HK1029180A1 - Planar patterns with superimposed diffraction grating - Google Patents
Planar patterns with superimposed diffraction gratingInfo
- Publication number
- HK1029180A1 HK1029180A1 HK00108484A HK00108484A HK1029180A1 HK 1029180 A1 HK1029180 A1 HK 1029180A1 HK 00108484 A HK00108484 A HK 00108484A HK 00108484 A HK00108484 A HK 00108484A HK 1029180 A1 HK1029180 A1 HK 1029180A1
- Authority
- HK
- Hong Kong
- Prior art keywords
- diffraction grating
- visible light
- elements
- microscopically small
- pattern
- Prior art date
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
Abstract
The invention relates to a planar pattern (1) consisting of elements (2 to 5) arranged in a mosaic-like manner of which at least one pattern consists of a background element (4) and an image element (2) with microscopically small relief structures which diffract visible light. The planar elements (3) and part elements (5) contain either the microscopically small relief structures diffracting visible light or consist of reflecting or dispersing surfaces. A first diffraction grating B1 is arranged in the image element (2) and a second diffraction grating B2 is arranged in the background element (4). The first diffraction grating B1 and the second diffraction grating B2 are formed by the superimposition of at least two different microscopically small relief structures F1 and F2 which diffract visible light. The first diffraction grating B1 and the second diffraction grating B2 differ only by a relative phase shift DELTA phi between the relief structure F1 and the relief structure F2. On illumination with polychromatic light the pattern presents a single colour, with differences in brightness in areas having different relative phase shift DELTA phi values.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00191/98A CH693316A5 (en) | 1998-01-27 | 1998-01-27 | Surface patterns with superimposed diffraction gratings. |
PCT/EP1999/000388 WO1999038039A1 (en) | 1998-01-27 | 1999-01-21 | Planar patterns with superimposed diffraction grating |
Publications (1)
Publication Number | Publication Date |
---|---|
HK1029180A1 true HK1029180A1 (en) | 2001-03-23 |
Family
ID=4181330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK00108484A HK1029180A1 (en) | 1998-01-27 | 2000-12-28 | 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) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9929752D0 (en) * | 1999-12-17 | 2000-02-09 | Secr Defence | Textured surface |
BR0110078B1 (en) | 2000-04-15 | 2014-04-29 | Ovd Kinegram Ag | SURFACE PATTERN |
DE10127981C1 (en) * | 2001-06-08 | 2003-01-16 | Ovd Kinegram Ag Zug | Diffractive security element |
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 |
WO1997027504A1 (en) * | 1996-01-26 | 1997-07-31 | Landis & Gyr Technology Innovation Ag | Surface pattern |
-
1998
- 1998-01-27 CH CH00191/98A patent/CH693316A5/en not_active IP Right Cessation
-
1999
- 1999-01-21 AT AT99903666T patent/ATE237145T1/en active
- 1999-01-21 DE DE59904949T patent/DE59904949D1/en not_active Expired - Lifetime
- 1999-01-21 ES ES99903666T patent/ES2197612T3/en not_active Expired - Lifetime
- 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 CA CA002319137A patent/CA2319137C/en not_active Expired - Fee Related
-
2000
- 2000-12-28 HK HK00108484A patent/HK1029180A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1999038039A1 (en) | 1999-07-29 |
CA2319137C (en) | 2003-09-23 |
EP1051648A1 (en) | 2000-11-15 |
CA2319137A1 (en) | 1999-07-29 |
ATE237145T1 (en) | 2003-04-15 |
DE59904949D1 (en) | 2003-05-15 |
ES2197612T3 (en) | 2004-01-01 |
CH693316A5 (en) | 2003-05-30 |
EP1051648B1 (en) | 2003-04-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PF | Patent in force | ||
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20100121 |