•IR Region thermal sources (Black Body) are:
a)Nernst Glower – fused mixture of ZrO2, Y2O3, and ThO2 normally operated at 1900 oC – better for shorter IR λ’s (near IR)
b)Globar – silicon carbide normally operated at 1200 to 1400 oC – better at longer IR λ’s (doesn’t approach Black Body)
c)Incandescent Wire – e.g., nichrome wire – cheapest way