Title:
書類またはアイテムにマーキングする方法、マーキングされた書類またはアイテムを識別する方法および装置、円偏光粒子の使用法
Document Type and Number:
Japanese Patent JP2010525343
Kind Code:
A
Abstract:
Optical identification and/or authentication of a document or item with the help of a marking comprising a random distribution of circular polarized light reflecting particles, the marking being applied to the document or item through an ink, and the reading device exploiting circular polarization to discriminate the flakes from the background.
Inventors:
Andrea, Calegari
Deco, Eric
Deco, Eric
Application Number:
JP2010504515A
Publication Date:
July 22, 2010
Filing Date:
April 18, 2008
Export Citation:
Assignee:
Sicpa Holding S.A.
International Classes:
G01N21/21
Domestic Patent References:
| JPH1142875A | 1999-02-16 | |||
| JP2005534112A | 2005-11-10 | |||
| JP2003073600A | 2003-03-12 | |||
| JP2007519983A | 2007-07-19 |
Foreign References:
| WO2004097730A1 | 2004-11-11 |
Attorney, Agent or Firm:
Seiji Ohno
Koji Morita
Reiko Tanaka
Mamoru Suzuki
Koji Morita
Reiko Tanaka
Mamoru Suzuki