The Micro-mirror Array Technology In Anti-counterfeiting Design Of High-fidelity Printing

With the rapid development of economy and science technology and the increasing prosperity of the commodity market, the fake and inferior products are widespread at the same time. These products once flowing into the market will bring out huge economic losses to people, and cause serious damage to social order. So the anti-counterfeiting features of products must be improved, making it difficult to be forged. The micro-mirror array imaging technology produces the micro-mirror structure by direct relief or online printing, and makes use of the light reflecting to form the image with light varying effect. The existing micro-mirror pixel of the micro-mirror array imaging technology composed by curve structure is suitable for coding four or less color values. This paper takes more than four color values of high-fidelity prints as the modulation parameters to establish the micro-mirror pixel model with new surface structure.According to micro-mirror model composed of the cosine or cosine product can satisfy the brightness and the stability requirement of anti-counterfeiting optical variable images. This paper adopts the product of two cosine function to build the micro-mirror pixel model of double-cosine curve structure. The simulation of our new model shows that the color values RGB of the rgbs Q micro-mirror pixel model can not only use as coding colors but also as a structural anti-counterfeiting design and direction anti-counterfeiting parameters. The new model is modulated not only by the values of r, g, b and s, but also by the value of Q. The new model can code five colors and be able to apply into the anti-counterfeiting design of high-fidelity printing.By using the exponential method of sine and cosine functions and the linear superposition principle of Harmonic function, two anti-counterfeiting optical variable micro-mirror pixel models with eight parameters curve structure has been established. The simulation shows that the surface fine degree, the height of micro structure and display angle of anti-counterfeiting images of the micro-mirror pixel structure vary as the parameters changes of c r Smyk gb, which forms the micro-mirror pixel with different reflection characteristics and presents a rich optical variable effect.The micro-mirror array formed by the micro-mirror pixel model show the obvious depth features. The model can use the color values of high-fidelity printing to modulate the surface shape of micro-mirror pixel and the tilt angle and directions. This kind of anti-counterfeiting coding is difficult to be mastered and optical variable images are hard to copy. Under the normal light, the anti-counterfeiting information can be quickly identified by our eyes, which improves the reliability and uniqueness of anti-counterfeiting security. The manufacturing cost of optical variable images can be hugely reduced by the use of printing technology. The new model provides the new reference and theoretical basis for high-fidelity printing design.