{TAIL ~ A fourth optical surface} 16120 may be disposed in communication with {HEAD ~ third support member} 16110 
{ TAIL ~ A fourth optical surface } 16120 may be disposed in communication with { HEAD ~ third support member } 16110
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH