Title:
光学セキュリティ装置
Document Type and Number:
Japanese Patent JP6927886
Kind Code:
B2
Abstract:
The invention relates to an optical device comprising two patterned retarders and a reflective polarizer between the retarders. Information which is stored in the pattern of the retarders can be observed both in transmission and reflection. The device according to the invention can be used as high security element, for example for banknotes.
Inventors:
Marz, Julian
Seiberle, Hubert
Seiberle, Hubert
Application Number:
JP2017561408A
Publication Date:
September 01, 2021
Filing Date:
May 23, 2016
Export Citation:
Assignee:
ROLIC AG
International Classes:
G02B5/30; B42D25/364
Domestic Patent References:
| JP2011242714A | ||||
| JP2001525080A | ||||
| JP2012177842A | ||||
| JP2008139510A |
Foreign References:
| WO2007051529A1 | ||||
| WO2011065242A1 | ||||
| US20140103633 |
Attorney, Agent or Firm:
Patent business corporation Tsukuni