Bringing real-time, fine-scale, subsurface quality control to 3D printing

https://resou.osaka-u.ac.jp/en/research/2021/20210916_3

"We generated ultrasonic waves in the megahertz range to uncover small defects that are frequently difficult to image... can even detect defects that are only 500 micrometers... By further optimizing the defect detection system, one could detect damage to a 3D-printed part as fabrication proceeds, and thus repair it in real time with the same ease as is done in machining. In so doing, the Osaka University researchers are enhancing the practicality of 3D printing for building intricate devices on a commercial scale"