Polarization conversion component based on micro-nano structure

The invention provides a polarization conversion component based on a micro-nano structure. The polarization conversion component comprises a glass substrate; the first micro-nano structure is arranged on the incident surface of the glass substrate; the second micro-nano structure is arranged on the emergent surface of the glass substrate, and the second micro-nano structure and the glass substrate are staggered in the vertical direction; the mixed incident light is incident to the first micro-nano structure in a set incident direction, and the mixed incident light is divided into first polarized light and second polarized light after passing through the first micro-nano structure; the first micro-nano structure refracts the first polarized light and transmits the second polarized light at a set refraction angle, the first polarized light is refracted to the second micro-nano structure after passing through the first micro-nano structure, and the second micro-nano structure refracts the first polarized light