Wearable/ compact integrated metasurface-freeform system enabled multi-focal planes augmented reality display

https://www.eurekalert.org/news-releases/1115489

"eye strain caused by where eyes point/ where they focus disconnect... overcome using: non-orthogonal polarization-multiplexing metasurfaces performing different optical functions based on light's polarization allowing for multiple depth planes, freeform optics for design flexibility keep system slim while maintaining high image quality, joint optimization combining ray tracing/ diffraction theory ensuring clarity/ non-distortion... clear focus distances: 0.7 m, 1.5 m, 3 m., otherwise realistic defocusing"