Pixie Dust: Graphical Levitation System (2014-)
Presentation for SIGGRAPH 2014 for a system developed by the University of Tokyo that can levitate and manipulate small objects with ultrasound waves. This project was announced at the very start of this year, but is introducing the idea of projecting colour to the levitating forms - video embedded below:
We propose a novel graphics system based on the expansion of 3D-acoustic-manipulation technology. In the conventional study of acoustic levitation, small objects are trapped in the acoustic beams of standing waves. We expand this method by changing the distribution of the acoustic-potential field (APF). Using this technique, we can generate the graphics using levitated small objects. Our approach makes available many expressions such as the expression by materials and nondigital appearance. These kinds of expressions are used in many applications and we aim to combine them with digital controllability.
You can find out more about the project here