FIGS 5A and 5B illustrate {TAIL ~ a relatively uniform rate} of motion of the fiber optic pair to and from {HEAD ~ the surface} of the object being measured  
FIGS 5A and 5B illustrate { TAIL ~ a relatively uniform rate } of motion of the fiber optic pair to and from { HEAD ~ the surface } of the object being measured
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH