{TAIL ~ The method} 1 wherein the first, second and third paths define a central window portion having {HEAD ~ a solid radiation conducting path} between an upper and lower portion thereof 
{ TAIL ~ The method } 1 wherein the first , second and third paths define a central window portion having { HEAD ~ a solid radiation conducting path } between an upper and lower portion thereof
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH