Anti-reflection microstructure and manufacturing method thereof

The invention discloses an antireflection microstructure, which relates to the technical field of optics, is used on a window of an optical device, and comprises a substrate, the micro-structure layer is arranged on the upper surface and/or the lower surface of the substrate, the micro-structure layer comprises at least two micro-structure array layers which are arranged in a stacked mode, each micro-structure array layer comprises a plurality of micro-structures, and the micro-structures in different micro-structure array layers are made of different materials. The microstructure layer of the anti-reflection microstructure comprises the microstructure array layer, the microstructure array layer comprises the multiple microstructures, the microstructure array layer can be equivalent to a thin film with gradient refractive index distribution, the anti-reflection effect is achieved, meanwhile, the number of the microstructure array layers is two or more, the different microstructure array layers are made of dif