{HEAD ~ Third optical surface} 16100 may be disposed in {TAIL ~ communication} with a third support member 16110 
disposed in
{ HEAD ~ Third optical surface } 16100 may be disposed in { TAIL ~ communication } with a third support member 16110
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH