Eyepiece consisting of two layers of meta-optics has large aperture and wide field of view

https://www.eurekalert.org/news-releases/1073971

"1st optic both 2.1 cm aperture and corrector plate, 2nd a focusing lens, together has high-quality imaging up to 60° full field of view... improved image quality over wide field of view at design wavelength/ reduced total track length... meta-optics integration into full-scale near-eye AR, VR, night vision... compact form-factor... single-wavelength 633 nm illumination suitable for monochromatic applications... future: applications requiring full color"