Control of acoustic holograms allows storage of multiple images simultaneously in single hologram

https://techxplore.com/news/2024-10-holographic-3d-potential-revolutionize-multiple.html

"tiny cavitation bubbles create extremely high temperatures/ pressure for trillionths of second quickly harden resin into complex acoustic holograms containing cross-sectional images... robotic arm movement based on algorithm-designed pattern... improve printing speed up to 20X, using less energy... can change image during printing... printing behind opaque objects: wall, inside tube, already approved for medical applications: print complex tissues (skin grafts), localized targeted drug/ cell delivery"