Invention Grant
- Patent Title: Optical element
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Application No.: US14447987Application Date: 2014-07-31
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Publication No.: US09643445B2Publication Date: 2017-05-09
- Inventor: Martin Schadt , Hubert Seiberle
- Applicant: Rolic AG
- Applicant Address: CH Zug
- Assignee: ROLIC AG
- Current Assignee: ROLIC AG
- Current Assignee Address: CH Zug
- Agency: Sughrue Mion, PLLC
- Priority: CH1082/97 19970509
- Main IPC: G02F1/13
- IPC: G02F1/13 ; B42D25/364 ; G02B5/30 ; G02B27/28 ; G06K19/06 ; G02F1/13363 ; B42D25/29 ; G02B5/32 ; B42D25/391

Abstract:
An element for protection against forgery and/or copying is arranged on a substrate and includes an optically anisotropic layer which has at least two regions with different optical axes, characterized in that the substrate is a reflective polarizer. The optically anisotropic layer can include cross-linked liquid crystal monomers. The anisotropic layer can be placed on an orientation layer. The orientation layer can be in contact with the polarizer and can include a photo-oriented polymer network. A device for protection against forgery and/or copying is characterized in that an element as set forth above and an analyzer are arranged on the same substrate.
Public/Granted literature
- US20140340626A1 OPTICAL ELEMENT Public/Granted day:2014-11-20
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