By cutting off this infra red range of the spectrum, the sensitivity of {HEAD ~ the camera device} for {TAIL ~ infra red radiation} is reduced 
for
By cutting off this infra red range of the spectrum , the sensitivity of { HEAD ~ the camera device } for { TAIL ~ infra red radiation } is reduced
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH