Meta lens and optical apparatus including the same

Abstract

A meta lens includes: a first lens surface; and a second lens surface facing the first lens surface, wherein at least one of the first lens surface and the second lens surface is a meta surface including a plurality of nano structures having a sub-wavelength size. In at least some regions of the first lens surface and the second lens surface, trends of the first lens surface and the second lens surface to deflect incident light according to positions are opposite to each other, and thus chromatic aberration can be corrected and generation of geometric aberration can be reduced as much as possible.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 912,143 filed with the U.S. Intellectual Property Office on October 8, 2019 and Korean Patent Application No. 10-2020-0078818 filed with the Korean Intellectual Property Office on June 26, 2020 , the entire disclosure of which is hereby incorporated by reference. technical field [0003] The present disclosure relates to metalens and optical devices including the metalens. Background technique [0004] The imaging device includes a plurality of lenses for correcting geometric and chromatic aberrations. Typically, lenses with negative refractive power are used to correct chromatic aberrations, however, lenses produce geometric aberrations. Aspheric lenses can be used to correct geometric aberrations, but the refractive power of aspheric lenses affects chromatic aberration. [0005] Therefore, a large number of lenses are required to simultaneo...

AI Technical Summary

Problems solved by technology

The thickness of the refractive lens that adjusts the refractive power by using the curvature increases rapidly as the curvature decreases, so it is difficult to realize a thin optical system that corrects various aberrations

Images