a quarter wave plate disposed between {HEAD ~ the polarization beam splitter} and {TAIL ~ the reflective liquid crystal display device}; and 
a quarter wave plate disposed between { HEAD ~ the polarization beam splitter } and { TAIL ~ the reflective liquid crystal display device } ; and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH