131
16 Thermographic measurement techniques ...................................................................................
131
16.1
Introduction ..........................................................................................................................
131
16.2
Emissivity ..............................................................................................................................
132
16.2.1
Finding the emissivity of a sample .......................................................................
132
16.2.1.1
Step 1: Determining reflected apparent temperature .......................
134
16.2.1.2
Step 2: Determining the emissivity ...................................................
135
16.3
Reflected apparent temperature ..........................................................................................
137
17 History of infrared technology ......................................................................................................
141
18 Theory of thermography ................................................................................................................
141
18.1
Introduction ...........................................................................................................................
141
18.2
The electromagnetic spectrum ............................................................................................
142
18.3
Blackbody radiation ..............................................................................................................
143
18.3.1
Planck’s law ..........................................................................................................
144
18.3.2
Wien’s displacement law ......................................................................................
146
18.3.3
Stefan-Boltzmann's law .........................................................................................
146
18.3.4
Non-blackbody emitters .......................................................................................
149
18.4
Infrared semi-transparent materials .....................................................................................
151
19 Emissivity tables .............................................................................................................................
151
19.1
References ............................................................................................................................
151
19.2
Important note about the emissivity tables ..........................................................................
151
19.3
Tables ....................................................................................................................................
167
Index ................................................................................................................................................
xiv
Publ. No. 1557882 Rev. a156 – ENGLISH (EN) – February 28, 2006
Содержание ThermaCAM B2
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