FIELD: physics, alarm.
SUBSTANCE: optical component of safety for authentication of document or product has plastic transparent film, which has at least one diffraction lattice. Embossed surface is at least partially coated with layer of dielectric material with high index of refraction, which creates effect of colouring into the first colour for the first orientation of component and into the second other colour for orientation that is perpendicular to the first orientation. Layer of dielectric material is coated from the side, which is opposite to direction of surveillance, by layer with low index of refraction, and then by contrast coloured layer having transparent zones and coloured zones, to increase differences of colouring in case of orientation variations.
EFFECT: improved optical characteristics of optical safety components due to improved differentiation of colouring variations.
12 cl, 4 dwg
