User`s manual
17.2.1 Finding the emissivity of a sample
17.2.1.1 Step 1: Determining reflected apparent temperature
Use one of the following two methods to determine reflected apparent temperature:
17.2.1.1.1 Method 1: Direct method
Look for possible reflection sources, considering that the incident angle = reflection angle (a
= b).
10588903;a1
Figure 17.1 1 = Reflection source
1
If the reflection source is a spot source, modify the source by obstructing it using a piece if
cardboard.
10589103;a2
Figure 17.2 1 = Reflection source
2
68 Publ. No. T559132 Rev. a449 – ENGLISH (EN) – April 21, 2010
17 – Thermographic measurement techniques