FIELD: relief film; laminating film; self-adhesive film; optical protective element.
SUBSTANCE: film has a base layer and a double layer. The film contains a liquid-crystal material, which is deposited onto the double layer. A diffraction structure is stamped onto the surface of the double layer. The double layer is put next to the layer of the liquid-crystal material, for orientation of the liquid-crystal material. The diffraction structure has two separate regions with different orientation of the relief structure.
EFFECT: increased degree of protection from counterfeit, simplification, increased rate of manufacturing.
27 cl, 9 dwg
