▎ 摘　　要

NOVELTY - Double-layer identification quantum dot anti-counterfeiting label based on an optically convex surface comprises a substrate layer, an optically convex surface layer and a quantum dot light-emitting layer provided on the substrate layer, and a cover layer located on the uppermost layer. The optical convex surface layer and the quantum dot light-emitting layer are in mutual contact, embedding or coating relation. USE - The double-layer identification quantum dot anti-counterfeiting label based on an optically convex surface is useful for flexible and stretchable applications. ADVANTAGE - The label is economical, has simple technological process, and stable chemical properties, and combined with the rich colors of quantum dots, can realize double-layer progression of multiple colors-type anti-counterfeiting, through the establishment of two sets of intelligent label learning library, image recognition can be realized. The double-layer identification design of the quantum dot anti-counterfeiting label takes into account easy detection and anti-counterfeiting capabilities. The first layer identification only requires a portable lens to cooperate with the excitation light source to be connected to the electronic device, which is easy for daily detection. The accuracy of the second-layer recognition pattern can reach the nanometer level, which can ensure a sufficiently strong anti-counterfeiting ability. DETAILED DESCRIPTION - AN INDEPENDENT CLAIM is also included for: a method for preparing a double-layer identification quantum dot anti-counterfeiting label based on an optically convex surface, comprising (i) preparing and cutting the transparent material of the substrate layer; (ii) preparing an optically convex surface layer on the substrate layer; (iii) preparing a quantum dot light-emitting layer on the optically convex surface layer; (iv) covering the cover plate layer on the quantum dot light-emitting layer; (v) collecting the luminous pattern on the surface of the optical convex surface as the first layer of anti-counterfeiting information; and (vi) collecting the luminous pattern around the optical convex surface as the second layer of anti-counterfeiting information.