The laser beam b having {HEAD ~ the P polarized component} left due to {TAIL ~ the retardation defect} passes through the polarizing beam splitter 3 to be left as laser beam d 
The laser beam b having { HEAD ~ the P polarized component } left due to { TAIL ~ the retardation defect } passes through the polarizing beam splitter 3 to be left as laser beam d
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH