Invention Grant
US08672218B2 Method of marking a document or item; method and device for identifyng the marked document or item; use of circular polarizing particles
有权
标记文件或物品的方法; 用于识别标记的文件或项目的方法和装置; 使用圆偏光粒子
- Patent Title: Method of marking a document or item; method and device for identifyng the marked document or item; use of circular polarizing particles
- Patent Title (中): 标记文件或物品的方法; 用于识别标记的文件或项目的方法和装置; 使用圆偏光粒子
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Application No.: US13458282Application Date: 2012-04-27
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Publication No.: US08672218B2Publication Date: 2014-03-18
- Inventor: Andrea Callegari , Eric Decoux
- Applicant: Andrea Callegari , Eric Decoux
- Applicant Address: CH Prilly
- Assignee: Sicpa Holding SA
- Current Assignee: Sicpa Holding SA
- Current Assignee Address: CH Prilly
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: EPPCT/EP2007/003588 20070424
- Main IPC: G06K19/00
- IPC: G06K19/00
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.
Public/Granted literature
Information query
