Paper sheet handling machine
US-2015379798-A1 · Dec 31, 2015 · US
Security marking authentication device
US8985463B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8985463-B2 |
| Application number | US-68175310-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 9, 2007 |
| Priority date | Oct 9, 2007 |
| Publication date | Mar 24, 2015 |
| Grant date | Mar 24, 2015 |
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Abstract
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The invention discloses an authentication device for the visual authentication of a document or item comprising a circular polarizing security marking, said device comprising a light source and polarization filters for the either parallel or alternate illumination of said marking on said document with left- and right-circular polarized light. Corresponding methods for the visual and the automated authentication of the marking are disclosed as well.
First claim
Opening claim text (preview).
The invention claimed is: 1. A visual authentication device for the visual authentication of a document or item having a circular polarizing security marking, said device comprising: at least one light source and at least one circular polarizing filter structured and arranged to emit left- and right-circular polarized light onto the document for the illumination of the said marking, wherein either: two beams of light of opposite circular polarizations are produced to simultaneous…
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Frequently asked questions
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- What does patent US8985463B2 cover?
- The invention discloses an authentication device for the visual authentication of a document or item comprising a circular polarizing security marking, said device comprising a light source and polarization filters for the either parallel or alternate illumination of said marking on said document with left- and right-circular polarized light. Corresponding methods for the visual and the automat…
- Who is the assignee on this patent?
- Decoux Eric, Callegari Andrea, Sicpa Holding Sa
- What technology area does this patent fall under?
- Primary CPC classification G07D7/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 24 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).