Data from the look up table drives a piezoelectric positioning mechanism that is physically coupled to {HEAD ~ a substrate} carrying {TAIL ~ both the detector} and the image source 
carrying
Data from the look up table drives a piezoelectric positioning mechanism that is physically coupled to { HEAD ~ a substrate } carrying { TAIL ~ both the detector } and the image source
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH