{HEAD ~ A filter} of {TAIL ~ the type} depicted in FIG 2 is suitable for infrared radiation in the spectral range of wavelengths from approximately 1.8 microns to 1000 microns 
of
{ HEAD ~ A filter } of { TAIL ~ the type } depicted in FIG 2 is suitable for infrared radiation in the spectral range of wavelengths from approximately 1.8 microns to 1000 microns
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH