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