The particular embodiment of FIG 2 having layer thicknesses disclosed hereinabove is suitable for infrared radiation in the wavelength range from {TAIL ~ approximately 15 microns} to {HEAD ~ 30 microns} 
The particular embodiment of FIG 2 having layer thicknesses disclosed hereinabove is suitable for infrared radiation in the wavelength range from { TAIL ~ approximately 15 microns } to { HEAD ~ 30 microns }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD