Optical anti-counterfeiting element and optical anti-counterfeiting product

An optical anti-counterfeiting element, comprising:

• a substrate having a first surface and a second surface opposite each other, at least a partial region of the substrate is transparent;
• a microstructure formation layer formed on the first surface, the microstructure formation layer has at least a first region and a second region, the first region comprises a first surface micro relief structure, the second region comprises a second surface micro relief structure, and a specific volume of the first surface micro relief structure is less than a specific volume of the second surface micro relief structure;
• and
• a reflective layer, a protective layer, a first transflective coating, a dielectric layer and a second transflective coating which sequentially and homomorphically cover on the first region, the first transflective coating, the dielectric layer and the second transflective coating also sequentially and homomorphically cover on the second region, wherein a ratio of a refractive index of the first transflective coating to an extinction coefficient of the first transflective coating is different from a ratio of a refractive index of the second transflective coating to an extinction coefficient of the second transflective coating;
• the first transflective coating, the dielectric layer and the second transflective coating covering on the second region from a first multi-layer optically variable coating, and the reflective layer, the protective layer, the first transflective coating, the dielectric layer and the second transflective coating, covering on the first region form a second multi-layer optically variable coating, and the first multi-layer optically variable coating on the second region and the second multi-layer optically variable coating on the first region are strictly positioned on the two regions respectively.