What is the principle of the Micro-light Hidden Engraving identity anti-counterfeiting label?

A: The micro-light intaglio identity anti-counterfeiting label is a micro-nano optical anti-counterfeiting technology. It creates extremely fine patterns or text marks on the surface of the film through precise micro-processing (such as laser micro-engraving or nano-imprinting). Features: ① When the screen is on, the micro-etching structure has a minimal impact on the screen's light output, and the markings are nearly invisible, not affecting viewing. After the screen is turned off, under the illumination of ambient light at a specific Angle, the micrography structure undergoes diffraction or scattering, and the marking becomes visible (usually in the lower left corner). This anti-counterfeiting label combines the functions of brand identification and genuine product verification. Moreover, due to its micro-nano structure, it is difficult to imitate. Woowhead Guanfudun is equipped with a low-light hidden engraving identity anti-counterfeiting label. When the screen is on, it is nearly invisible and does not affect the picture quality. When the screen is off, the brand logo appears in the lower left corner, which is used for anti-counterfeiting of genuine products and brand identification. In combination with the circularly polarized light detection card, it forms ";" "Technical verification + identity anti-counterfeiting" A dual verification system. SGS measured the light transmittance to be 96.5% and the haze to be 0.4%. The anti-counterfeiting label does not affect the optical performance.