Paper-thin, electronically switchable metalens alternates between depth-sensing and high-detail imaging in milliseconds

https://www.eurekalert.org/news-releases/1118070

"replaces bulky lenses with single flat component, reconfigures focus with simple electrical nudge... liquid crystal thin layer/ small voltage, toggles lens between 2 views: 1 acts as depth ruler, creating rotating spots allowing computer to map 3D structures directly, other provides extended focus keeping fine details sharp across wide range without mechanical movement... flat, existing fabrication compatible... smartphones, endoscopes, lightweight robotics/AR optics, observing moving biological samples"