Tracking a Millimetric Dual-Magnet Assembly: Toward Detecting Torsional Eye Motion

Tracking eye movements with high precision is crucial for various medical and technological applications, yet detecting subtle torsional motion remains a challenge. This paper presents a magnetic sensor system that accurately tracks the full 6-degree-of-freedom motion (6-DoF) of a miniature dual-magnet assembly. This work leverages two (nearly) orthogonal magnetic dipoles, building upon previous results achieved with a single-dipole source. The 6-DoF tracking and the achieved level of precision may enable the detection of complex eye movements, including torsion. Moreover, the system can also track head orientation, expanding its applications in biomedical research, assistive technologies, and human-computer interaction.