User Manual

Table of contents
30.2.1 Finding the emissivity of a sample .................................... 81
30.3 Reflected apparent temperature ................................................. 84
30.4 Distance ............................................................................... 84
30.5 Relative humidity..................................................................... 84
30.6 Other parameters.................................................................... 84
31 History of infrared technology ........................................................... 86
32 Theory of thermography ................................................................... 89
32.1 Introduction ........................................................................... 89
32.2 The electromagnetic spectrum ................................................... 89
32.3 Blackbody radiation................................................................. 89
32.3.1 Planck’s law ................................................................ 90
32.3.2 Wien’s displacement law................................................ 91
32.3.3 Stefan-Boltzmann's law.................................................. 92
32.3.4 Non-blackbody emitters ................................................. 93
32.4 Infrared semi-transparent materials ............................................. 95
33 The measurement formula ................................................................ 96
34 Emissivity tables ........................................................................... 100
34.1 References...........................................................................100
34.2 Tables .................................................................................100
#T559772; r.5948/5948; en-US
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