9 papers
Event-Based Spatial-Carrier Interferometry for Surface-Normal Vibration-Waveform Reconstruction
Ryogo Niwa, Tatsuki Fushimi, Yoichi Ochiai
Non-contact measurement of small vibrations perpendicular to a surface supports the evaluation of mechanical structures, but in camera-based interferometry, increasing the frame ra…
Acoustic Manipulation of Tangible Janus Icons on Liquid Droplets
Yusuke Koroyasu, Yoichi Ochiai, Tatsuki Fushimi
Interfaces that couple digital information with physical matter enable computation to be expressed through tangible motion and touch, yet typically rely on embedded actuators, rigi…
Event Topology-based Visual Microphone for Amplitude and Frequency Reconstruction
Ryogo Niwa, Yoichi Ochiai, Tatsuki Fushimi
Accurate vibration measurement is vital for analyzing dynamic systems across science and engineering, yet noncontact methods often balance precision against practicality. Event cam…
Reversible vertical positioning of acoustically levitated particle using a spiral reflector
Yusuke Koroyasu, Takayuki Hoshi, Yoshiki Nagatani +3
Dynamic positioning in acoustic levitation typically depends on active control of the transducers phases, which necessitates complex driving electronics. While mechanically actuate…
Mid-Air Single-Sided Acoustic Levitation in High-Pressure Regions of Zero-Order Bessel Beams
Yusuke Koroyasu, Christopher Stone, Yoichi Ochiai +3
Acoustic levitation enables non-contact manipulation using sound waves. While conventional methods entrap particles at pressure nodes (zero-pressure region surrounded by high-press…
Dynamic Caustics by Ultrasonically Modulated Liquid Surface
Koki Nagakura, Tatsuki Fushimi, Ayaka Tsutsui +1
This paper presents a method for generating dynamic caustic patterns by utilising dual-optimised holographic fields with Phased Array Transducer (PAT). Building on previous researc…