Table of contents
29.2.1 General...................................................................... 218
29.2.2 Figure ........................................................................ 219
About FLIR Systems ........................................................................ 223
More than just an infrared camera .............................................. 224
Sharing our knowledge ............................................................ 225
Supporting our customers......................................................... 225
Terms, laws, and definitions.............................................................. 226
Thermographic measurement techniques .......................................... 228
Introduction .......................................................................... 228
Reflected apparent temperature................................................. 232
Distance ............................................................................... 232
Relative humidity .................................................................... 232
Other parameters.................................................................... 232
About calibration............................................................................. 233
Introduction ........................................................................... 233
Definition—what is calibration? .................................................. 233
Camera calibration at FLIR Systems ........................................... 233
Calibration, verification and adjustment........................................ 234
Non-uniformity correction.......................................................... 235
Thermal image adjustment (thermal tuning) .................................. 235
History of infrared technology........................................................... 236
Theory of thermography................................................................... 239
Introduction ........................................................................... 239
The electromagnetic spectrum................................................... 239
Blackbody radiation................................................................. 240
35.3.1 Planck’s law ................................................................ 241
35.3.2 Wien’s displacement law................................................ 242
35.3.3 Stefan-Boltzmann's law ................................................. 243
35.3.4 Non-blackbody emitters................................................. 244
Infrared semi-transparent materials............................................. 246
The measurement formula................................................................ 247
Emissivity tables ............................................................................. 251
References............................................................................ 251
Tables .................................................................................. 251
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