The present application provides an aspherical prism and a preparation method thereof, and the method including: S1, molding a lens and a prism integrally using a hot press molding method to obtain a molding body glass; S2, cutting the molding body glass into a strip glass; S3, performing a first grinding and a first polishing on a right-angled surface; S4, machining a curved surface structure on the right-angled surface; S5, performing a second polishing on the machined curved surface structure; S6, machining an reflective surface; S7, chamfering edges of the strip glass; S8, coating the strip glass after being chamfering; and S9, cutting the coated strip glass into individual aspherical prisms. The preparation method can not only process a plurality of aspherical prisms at one time, but also reduces the preparation cycle, improves processing efficiency, and minimizes dimensional fluctuations to achieve uniformity.

A method for manufacturing an optical element includes forming an optical element unit comprised of an optical material such as glass and having an outer shape of a regular triangle or a regular hexagon, arranging a plurality of optical element units two-dimensionally on a substrate so as to have a structure imitating a molecular structure of graphene or a carbon nanotube, and processing the substrate on which the plurality of optical element units are mounted into a desired surface shape.