The signal emanating from said {HEAD ~ photodiode array} is sent through a multi channel analyzer 23 which converts the individual signals into {TAIL ~ a spectrum}, as illustrated at 25 
The signal emanating from said { HEAD ~ photodiode array } is sent through a multi channel analyzer 23 which converts the individual signals into { TAIL ~ a spectrum } , as illustrated at 25
OTH OTH OTH OTH OTH 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 OTH OTH