Title:
回折型セキュリティー素子
Document Type and Number:
Japanese Patent JP4377239
Kind Code:
B2
Abstract:
A security element ( 2 ) comprising a plastic laminate ( 1 ) has a surface pattern which is composed mosaic-like at least from surface elements, wherein in the surface elements a reflecting interface ( 8 ) between a shaping layer ( 5 ) and a protective layer ( 6 ) of the plastic laminate ( 1 ) forms optically effective structures ( 9 ). Light ( 11 ) which is incident on the plastic laminate ( 1 ) and which passes through a cover layer ( 4 ) of the plastic laminate ( 1 ) and through the shaping layer ( 5 ) is deflected in a predetermined manner by means of the optically effective structures ( 9 ). Shaped in the surface of at least one of the surface elements is a diffraction structure which is produced by a superimposition of a linear asymmetrical diffraction grating ( 24 ) with a matt structure. The linear asymmetrical diffraction grating ( 24 ) has a spatial frequency from the range of values of between 50 lines/mm and 2,000 lines/mm. The matt structure has a mean roughness value from the range of between 20 nm and 2,000 nm and at least in one direction a correlation length of between 200 nm and 50,000 nm.
More Like This:
Inventors:
Schilling, Andreas
Wayne Robert Tompkin
Staup, Rene
Wayne Robert Tompkin
Staup, Rene
Application Number:
JP2003556246A
Publication Date:
December 02, 2009
Filing Date:
November 02, 2002
Export Citation:
Assignee:
Orfao Day Kinegram Age
International Classes:
B42D25/328; G03H1/18; B42D15/00; B42D25/29; D21H21/42
Domestic Patent References:
| JP61034192B1 | ||||
| JP2000264000A | ||||
| JP5273500A | ||||
| JP2116805A | ||||
| JP2165987A | ||||
| JP8211215A | ||||
| JP2002328210A | ||||
| JP2002341809A | ||||
| JP2812758B2 |
Foreign References:
| WO1997019821A1 | ||||
| US6043936 |
Attorney, Agent or Firm:
Yanagita Seiji
Go Sakuma
Go Sakuma