Dynamic z-scanning for ultrafast auto-focusing in laser processing

https://phys.org/news/2023-11-dynamic-z-scanning-ultrafast-auto-focusing-laser.html

"easier laser-based manufacturing, accommodating non-flat or changing surfaces... simultaneously track surface location and adjust focus... TAG lens axial varifocal optics at 0.1-1 MHz, bypassing delays from mechanical motion in beam propagation direction... simultaneous detection and movement dynamic z-scanning without mechanical axial movement... instantaneously follow surface topography in z-direction... dynamic beam shaping of light... optical metrology and 3D laser manufacturing"