Invention Grant
- Patent Title: Multiple hidden image security device
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Application No.: US15571302Application Date: 2016-05-23
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Publication No.: US10889141B2Publication Date: 2021-01-12
- Inventor: Reto Genini , Julien Martz , Etienne Berner , Benoit Schill
- Applicant: ROLIC AG
- Applicant Address: CH Zug
- Assignee: ROLIC AG
- Current Assignee: ROLIC AG
- Current Assignee Address: CH Zug
- Agency: Sughrue Mion, PLLC
- Priority: EP15169102 20150526
- International Application: PCT/EP2016/061518 WO 20160523
- International Announcement: WO2016/188936 WO 20161201
- Main IPC: G02B5/30
- IPC: G02B5/30 ; G02B27/28 ; B42D25/364 ; B42D25/391 ; B42D25/41
Abstract:
The invention relates to an optical security device with multiple hidden images which become visible by arranging a polarizer above or below the device. Additional images become visible upon rotation of the polarizer. The optical device comprises two patterned optical retarders and a polarizer between the retarders.
Public/Granted literature
- US20180272789A1 MULTIPLE HIDDEN IMAGE SECURITY DEVICE Public/Granted day:2018-09-27
Information query
