Table of contents
29.3 Supporting our customers....................................................... 462
30 Glossary ...................................................................................... 464
31 Thermographic measurement techniques ........................................ 467
31.1 Introduction ........................................................................ 467
31.2 Emissivity............................................................................ 467
31.2.1 Finding the emissivity of a sample.................................. 467
31.3 Reflected apparent temperature............................................... 470
31.4 Distance ............................................................................. 471
31.5 Relative humidity .................................................................. 471
31.6 Other parameters.................................................................. 471
32 History of infrared technology......................................................... 472
33 Theory of thermography................................................................. 475
33.1 Introduction ......................................................................... 475
33.2 The electromagnetic spectrum................................................. 475
33.3 Blackbody radiation............................................................... 475
33.3.1 Planck’s law .............................................................. 476
33.3.2 Wien’s displacement law.............................................. 477
33.3.3 Stefan-Boltzmann's law ............................................... 478
33.3.4 Non-blackbody emitters............................................... 479
33.4 Infrared semi-transparent materials........................................... 481
34 The measurement formula.............................................................. 482
35 Emissivity tables ........................................................................... 486
35.1 References.......................................................................... 486
35.2 Tables ................................................................................ 486
#T559880; r. AK/36075/36075; en-US
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