A quarter wave plate 202 and the polarization beam splitter 203 splits the composite light beam to two separate light beams as {HEAD ~ a function} of {TAIL ~ the handedness} of the circularly polarized light 
A quarter wave plate 202 and the polarization beam splitter 203 splits the composite light beam to two separate light beams as { HEAD ~ a function } of { TAIL ~ the handedness } of the circularly polarized light
OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH