{HEAD ~ a beam directing member} having {TAIL ~ an input surface} and an output surface which are spaced from and substantially parallel to each other 
having
{ HEAD ~ a beam directing member } having { TAIL ~ an input surface } and an output surface which are spaced from and substantially parallel to each other
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH