Single flat polarization-multiplexed metalens switches dynamically between bright-field optics and edge-enhanced visual processing

https://www.eurekalert.org/news-releases/1146534

"liquid-crystal-integrated, polarization-multiplexed, voltage-controlled switching between 2 bright-field imaging states and edge-enhanced state... 45°-polarized light causes destructive interference of shared low-frequency components while preserving high-frequency boundary information... in medical imaging sharpened cellular boundaries without requiring mechanical movements/  digital post-processing... compact: computer vision front-ends, contrast-enhanced optical diagnostics"