FLIR T4 Series User Manual

Table of contents
31 Glossary ........................................................................................ 75
32 Thermographic measurement techniques .......................................... 78
32.1 Introduction .......................................................................... 78
32.2 Emissivity.............................................................................. 78
32.2.1 Finding the emissivity of a sample.................................... 78
32.3 Reflected apparent temperature................................................. 81
32.4 Distance ............................................................................... 81
32.5 Relative humidity .................................................................... 81
32.6 Other parameters.................................................................... 81
33 History of infrared technology........................................................... 83
34 Theory of thermography................................................................... 86
34.1 Introduction ........................................................................... 86
34.2 The electromagnetic spectrum................................................... 86
34.3 Blackbody radiation................................................................. 86
34.3.1 Planck’s law ................................................................ 87
34.3.2 Wien’s displacement law................................................ 88
34.3.3 Stefan-Boltzmann's law ................................................. 89
34.3.4 Non-blackbody emitters................................................. 90
34.4 Infrared semi-transparent materials............................................. 92
35 The measurement formula................................................................ 93
36 Emissivity tables ............................................................................. 97
36.1 References............................................................................ 97
36.2 Tables .................................................................................. 97
#T559879; r. AG/12171/13006; en-US
xii

FLIR T4 Series Specifications

General

Brand	FLIR
Model	T4 Series
Category	Thermal cameras
Language	English