23 – The measurement formula
10400603;a2
Figure 23.3 Relative magnitudes of radiation sources under varying measurement conditions (SW camera).
1: Object temperature; 2: Emittance; Obj: Object radiation; Refl: Reflected radiation; Atm: atmosphere
radiation. Fixed parameters: τ = 0.88; T
= 20°C (+68°F); T
= 20°C (+68°F).
refl
atm
150
Publ. No. T559382 Rev. a358 – ENGLISH (EN) – June 23, 2009