Invention Grant
- Patent Title: Security device with a zero-order diffractive microstructure
- Patent Title (中): 具有零级衍射微结构的安全装置
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Application No.: US11659559Application Date: 2005-08-03
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Publication No.: US08270050B2Publication Date: 2012-09-18
- Inventor: Marc Schnieper , Alexander Stuck , Harald Walter
- Applicant: Marc Schnieper , Alexander Stuck , Harald Walter
- Applicant Address: CH
- Assignee: CSEM Centre Suisse d'Electronique et de Microtechnique S.A.
- Current Assignee: CSEM Centre Suisse d'Electronique et de Microtechnique S.A.
- Current Assignee Address: CH
- Agency: Fish & Richardson P.C.
- Priority: GB0417422.3 20040805
- International Application: PCT/IB2005/002494 WO 20050803
- International Announcement: WO2006/016265 WO 20060216
- Main IPC: G03H1/00
- IPC: G03H1/00 ; G02B5/18
Abstract:
A security device comprises a zero order diffractive microstructure buried within a substrate. One or more further optical structures, such as microlenses, may be formed on a surface of the substrate. The further optical structures modify the optical characteristics of the zero order diffractive microstructure such as by enhancing or reducing the color effect produced by the zero-order diffractive microstructure upon tilting the security device.
Public/Granted literature
- US20070247714A1 Security Device Public/Granted day:2007-10-25
Information query
