OPTICAL AUTHENTICATION COMPONENT AND METHOD OF ITS FABRICATION Russian patent published in 2015 - IPC B42D25/324 B42D25/40 G02B5/18 

FIELD: physics.

SUBSTANCE: claimed component visible at reflection comprises prominent structure. The latter is made on the substrate with refractive index n0. It comprises also the thin ply of dielectric material some 50-150 nm in depth with refractive index n1 other than n0 applied on prominent structure, and the ply of material with refractive index n2 approximating to n0, and encapsulating structure coated with thin ply. Said structure comprises the first and second patterns, the latter simulating the former that make the low relief including the set of facets, their shape simulating the low relief of prominent object. The second pattern makes the periodic grating simulating the first patter so that after application of thin ply and structure encapsulation the first colour can be produced at the angle of observation and second colour at the second angle of observation by azimuthal turn of the component.

EFFECT: better identification and memorization owing to colour variation subject to direction of observation and visual effect of 3D relief.

15 cl, 16 dwg