Thus, an internal chamber 16150 may be disposed internally to {HEAD ~ internal lens member} 16090 and may be bounded by support members 16110, 16130, 16140 and {TAIL ~ optical surfaces} 16100, 16120 
Thus , an internal chamber 16150 may be disposed internally to { HEAD ~ internal lens member } 16090 and may be bounded by support members 16110 , 16130 , 16140 and { TAIL ~ optical surfaces } 16100 , 16120
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH