Korean researchers shrink augmented reality lenses to fit everyday eyewear

Korean researchers have created an ultrathin optical lens system that allows augmented reality glasses to maintain bright, legible digital images even in direct sunlight. This breakthrough addresses a significant engineering challenge that has prevented AR glasses from blending seamlessly with everyday eyewear. The team, comprising experts from Pohang University of Science and Technology (POSTECH) and Samsung Research, developed a prototype with a 1.5-millimeter-thick waveguide.

This waveguide, composed of engineered nanostructures known as metasurfaces, guides light from a small projector into the wearer's eye. The research was published in the journal Nature by the Ministry of Science and ICT. While numerous tech giants, including Meta, Apple, Google, and Samsung, have been working on lightweight smart glasses that can overlay navigation, translations, and messages onto the real world, engineers have faced a persistent trade-off.

Widening the viewing area to enable users to look around without losing the image often results in light scattering and leaking out of the lens, causing the augmented reality images to become distorted or difficult to see.