Finding The Emissivity Of A Sample; Step 1: Determining Reflected Apparent Temperature - FLIR i5 User Manual

20 – Thermographic measurement techniques
20.2.1

Finding the emissivity of a sample

20.2.1.1

Step 1: Determining reflected apparent temperature

Use one of the following two methods to determine reflected apparent temperature:
20.2.1.1.1 Method 1: Direct method
1 Look for possible reflection sources, considering that the incident angle = reflection angle (a
= b).
10588903;a1
Figure 20.1 1 = Reflection source
2 If the reflection source is a spot source, modify the source by obstructing it using a piece if
cardboard.
10589103;a2
Figure 20.2 1 = Reflection source
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Publ. No. T559382 Rev. a358 – ENGLISH (EN) – June 23, 2009