Development of an optical 2-axis force sensor usable in MRI environments

This paper presents a MR compatible force sensor. Recently, MRI are widely used in various fields, from medical purpose to brain science, and simultaneous measurement of force information enables more precise investigations of obtained images of living tissue. However, conventional metal force sensors which contaminate the true signals of MRI cannot be used in MRI environments. Furthermore, present MR compatible force sensors have limitation in accuracy, dynamic range and multi axis sensibility. In this paper, an optical 2-axis force sensor without any metal and electronic components in the sensing element is developed with photo sensors and optical fibers.