FIELD: physics.
SUBSTANCE: disclosed is a protective mark having a layer with a concealed polarisation image and a reflecting layer. The layer with the concealed polarisation image has isotropic and anisotropic regions; the layer with the concealed polarisation image is a dichronic light polariser based on organic layers of dichroic anionic dyes, and the layer with the concealed polarisation image has phase polarisation capability.
EFFECT: high level of counterfeit protection while providing a cheap and reliable method of authenticating marked articles.
26 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PROTECTIVE MARK | 2013 |
|
RU2555667C2 |
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|
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|
RU2725667C1 |
| LCD INDICATOR | 1996 |
|
RU2120651C1 |
| LIQUID-CRYSTAL DISPLAY WITH REFLECTION POLARIZER | 2001 |
|
RU2226708C2 |
| POLARIZER | 1998 |
|
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|
RU2403601C2 |
| COMPOSITE MARK | 2008 |
|
RU2431193C2 |
| FILM WITH POLYMER LAYER | 2005 |
|
RU2362684C2 |
