{HEAD ~ The reflectance illumination} is directed toward {TAIL ~ the objective} and sample by a fully reflective mirror, which injects approximately half of the interferometer beam into the microscope, and permits substantially all of the reflected beam to reach the detector 
{ HEAD ~ The reflectance illumination } is directed toward { TAIL ~ the objective } and sample by a fully reflective mirror , which injects approximately half of the interferometer beam into the microscope , and permits substantially all of the reflected beam to reach the detector
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH