Accordingly, {HEAD ~ the polarization beam splitter} 827 produces {TAIL ~ a seemingly single composite beam} including two pairs of multi colored components: one pair B11 and B12 is of p polarized light and the other B13 and B14 of p polarized light 
produces
Accordingly , { HEAD ~ the polarization beam splitter } 827 produces { TAIL ~ a seemingly single composite beam } including two pairs of multi colored components : one pair B11 and B12 is of p polarized light and the other B13 and B14 of p polarized light
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL 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 OTH OTH OTH