Title :
Measurement of Eye Movement with a Ferromagnetic Contact Ring
Author :
Zeevi, Yehoshua Y. ; Ish-Shalom, Jehuda
Author_Institution :
Man¿Vehicle Laboratory, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139, and the Division of Applied Sciences, Harvard University
fDate :
7/1/1982 12:00:00 AM
Abstract :
A new magnetic method for measurement of eye movement is presented. It is based on measurement of differential inductance variations of two C-shaped coils due to the movement of a conical ferromagnetic ring which fits on the sclera. High sensitivity over a wide dynamic range is obtained by using a tuned bridge and synchronous detector. Separation of the detector coils from the magnetic field source improves the resolution and stability, and enables a two-dimensional measurement with one pair of C-coils.
Keywords :
Biomedical measurements; Coils; Extraterrestrial measurements; Inductance; Laboratories; Magnetic field measurement; Magnetic separation; Motion measurement; Space technology; Transducers; Electromagnetic Fields; Electromagnetics; Eye Movements; Humans; Sclera; Transducers;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1982.324923
