Inverse Designed Extended Depth of Focus Meta-Optics for Broadband Imaging in the Visible
Optics
2021-10-01 v2
Abstract
We report an inverse-designed, high numerical aperture (~0.44), extended depth of focus (EDOF) meta-optic, which exhibit a lens-like point spread function (PSF). The EDOF meta-optic maintains a focusing efficiency comparable to that of a hyperboloid metalens throughout its depth of focus. Exploiting the extended depth of focus and computational post-processing, we demonstrate broadband imaging across the full visible spectrum using a 1 mm, f/1 meta-optic. Unlike other canonical EDOF meta-optics, characterized by phase masks such as a log-asphere or cubic function, our design exhibits a highly invariant PSF across ~290nm optical bandwidth, which leads to significantly improved image quality, as quantified by structural similarity metrics.
Keywords
Cite
@article{arxiv.2105.00160,
title = {Inverse Designed Extended Depth of Focus Meta-Optics for Broadband Imaging in the Visible},
author = {Elyas Bayati and Raphael Pestourie and Shane Colburn and Zin Lin and Steven G. Johnson and Arka Majumdar},
journal= {arXiv preprint arXiv:2105.00160},
year = {2021}
}