{HEAD ~ a reflector}, arranged between {TAIL ~ the optical lens} and the second image lens, to reflect and change the direction of the second projecting beam to the second image lens 
{ HEAD ~ a reflector } , arranged between { TAIL ~ the optical lens } and the second image lens , to reflect and change the direction of the second projecting beam to the second image lens
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL 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