| 摘要 |
The present invention relates to a new optical component comprising an anisotropic diffuser ( 5,10 ) with patterned anisotropy; and means ( 9, 11, 14, 16, 17, 20, 21, 30, 32 ) for providing a colourshift observable upon changing viewing angle ( 6 ) and/or changing angle of incident light ( 2 ). It also relates to methods for making such an optical component and uses of such optical components as security elements with a very high level of security.
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