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