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Theory of double magnetic induction (DMI) for measuring eye movements: correction for nonlinearity and simple calibration in two dimensions

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4 Author(s)
Bos, J.E. ; Free Univ. of Amsterdam, Netherlands ; Reulen, J.P.H. ; Boersma, H.J. ; Ditters, B.J.

An analytical theory approach, based on the concept of mutual induction, to describe the double magnetic induction method for measuring eye movements is presented. A polynomial approach to quantify the method's inherent nonlinearity is evaluated. The solutions to the one-dimensional problem are further elaborated, giving a simple approximation of the two-dimensional problem. The tow-dimensional approximation provides an easily applicable tool for double magnetic induction calibration. According to this theory, calibrations need only be performed parallel to the two main magnetic fields. As a final results, eye rotations are given in any direction as a function of the two measured induction voltages.

Published in:

Biomedical Engineering, IEEE Transactions on  (Volume:35 ,  Issue: 9 )