Invention Grant
US07292292B2 Element for protection against forgery or copying containing a structured retarder and a polarizer layer
有权
用于防止伪造或复制的元件,其包含结构化延迟器和偏振器层
- Patent Title: Element for protection against forgery or copying containing a structured retarder and a polarizer layer
- Patent Title (中): 用于防止伪造或复制的元件,其包含结构化延迟器和偏振器层
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Application No.: US11455747Application Date: 2006-06-20
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Publication No.: US07292292B2Publication Date: 2007-11-06
- Inventor: Martin Schadt , Hubert Seiberle
- Applicant: Martin Schadt , Hubert Seiberle
- Applicant Address: CH Allschwil
- Assignee: Rolic Ltd c/o Rolic Technologies Ltd.
- Current Assignee: Rolic Ltd c/o Rolic Technologies Ltd.
- Current Assignee Address: CH Allschwil
- Agency: Sughrue Mion Pllc.
- Priority: CH1082/97 19970509
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
A component has a substrate (1) made of a transparent material, for example glass. On this layer (1), there is a linear polarizer (2) on which there is a layer (3) of a photo-oriented polymer network (PPN)(=LPP) which is oriented in locally varying fashion via its surface which covers the substrate. The layer (3) is adjoined by an anisotropic layer (4) of cross-linked liquid-crystal monomers. This layer (4) then has a molecular arrangement whose orientation is defined by the underlying orientation layer (3). The layer (4) will have been photocross-linked by exposure to a suitable wavelength of light, with the result that the molecular orientation defined by the PPN layer (3) is fixed. The element, denoted as a whole by 7, can then be used as an optical component which is protected against forgery, it being possible for the orientation pattern of the liquid-crystal layer or the optical information stored therein to be made visible by means of an external polarizer (5), for example.
Public/Granted literature
- US20060232734A1 Element for protection against forgery or copying containing a structured retarder and a polarizer layer Public/Granted day:2006-10-19
Information query
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