Optical anti-counterfeiting element and manufacturing method therefor, and anti-counterfeiting product

An optical anti-counterfeiting element, wherein the optical anti-counterfeiting element comprises:

• a micro lens array layer, having a micro lens array;
• and
• a micro graphic-text array layer;
• the micro graphic-text array layer comprises a micro graphic-text area and a micro graphic-text background area;
• a surface undulation shape of the micro graphic-text area and a surface undulation shape of the micro graphic-text background area are different, and a height of the micro graphic-text area and a height of the micro graphic-text background area are different;
• or
• the surface undulation shape of the micro graphic-text area and the surface undulation shape of the micro graphic-text background area are different;
• or
• the height of the micro graphic-text area and the height of the micro graphic-text background area are different;
• and
• observing from one side of the micro lens array layer, the micro lens array samples and synthesizes the micro graphic-text array layer, so as to form a graphic-text area and a graphic-text background area with different visual features;
• and
• a coated optically variable film located on the micro graphic-text array layer, the coated optically variable film comprises an absorption layer, a dielectric layer and a reflecting layer, which are stacked from a surface of the micro graphic-text array layer in sequence, and the dielectric layer is formed by a wet coating process.