This light is reflected from a reflective layer at the output surface and from a reflective layer at {HEAD ~ the input surface} of {TAIL ~ the member} 
This light is reflected from a reflective layer at the output surface and from a reflective layer at { HEAD ~ the input surface } of { TAIL ~ the member }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL