35 – The measurement formula
10400703;a2
35
Figure 35.4 Relative magnitudes of radiation sources under varying measurement conditions (LW 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
288
Publ. No. 1558550 Rev. a557 – ENGLISH (EN) – October 7, 2011