The reflectance illumination is directed toward {HEAD ~ the objective} and sample by {TAIL ~ 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 
The reflectance illumination is directed toward { HEAD ~ the objective } and sample by { TAIL ~ 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
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL 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