Table of contents
29.4.1 General...................................................................... 184
29.4.2 Figure........................................................................ 184
29.5 Draft .................................................................................... 185
29.5.1 General...................................................................... 185
29.5.2 Figure........................................................................ 185
30 About FLIR Systems ........................................................................ 187
30.1 More than just an infrared camera .............................................. 188
30.2 Sharing our knowledge ............................................................ 189
30.3 Supporting our customers......................................................... 189
31 Terms, laws, and definitions.............................................................. 190
32 Thermographic measurement techniques .......................................... 192
32.1 Introduction .......................................................................... 192
32.2 Emissivity.............................................................................. 192
32.2.1 Finding the emissivity of a sample.................................... 192
32.3 Reflected apparent temperature................................................. 196
32.4 Distance ............................................................................... 196
32.5 Relative humidity .................................................................... 196
32.6 Other parameters.................................................................... 196
33 The secret to a good thermal image ................................................... 197
33.1 Introduction ........................................................................... 197
33.2 Background........................................................................... 197
33.3 A good image ........................................................................ 197
33.4 The three unchangeables—the basis for a good image ................... 198
33.4.1 Focus ........................................................................ 198
33.4.2 Temperature range ....................................................... 199
33.4.3 Image detail and distance from the object.......................... 200
33.5 The changeables—image optimization and temperature
measurement......................................................................... 201
33.5.1 Level and span ............................................................ 201
33.5.2 Palettes and isotherms .................................................. 201
33.5.3 Object parameters........................................................ 202
33.6 Taking images—practical tips .................................................... 202
33.7 Conclusion ............................................................................ 203
34 About calibration............................................................................. 204
34.1 Introduction ........................................................................... 204
34.2 Definition—what is calibration? .................................................. 204
34.3 Camera calibration at FLIR Systems ........................................... 204
34.4 The differences between a calibration performed by a user and
that performed directly at FLIR Systems....................................... 205
34.5 Calibration, verification and adjustment........................................ 205
34.6 Non-uniformity correction.......................................................... 206
34.7 Thermal image adjustment (thermal tuning) .................................. 206
35 History of infrared technology........................................................... 207
36 Theory of thermography................................................................... 210
36.1 Introduction ........................................................................... 210
36.2 The electromagnetic spectrum................................................... 210
36.3 Blackbody radiation................................................................. 211
36.3.1 Planck’s law ................................................................ 212
36.3.2 Wien’s displacement law................................................ 213
36.3.3 Stefan-Boltzmann's law ................................................. 214
#T810253; r. AA/42549/42549; en-US
xi
To Next Page
Loading...
Need help?
General
