IR-PAD SERIES USER MANUAL
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The following table gives typical emissivity of important materials:
Material
Emissivity
Water
0.36
Stainless steel
0.14
Aluminum plate
0.09
Asphalt
0.96
Concrete
0.97
Cast iron
0.81
Rubber
0.95
Wood
0.85
Brick
0.75
Tape
0.96
Brass plate
0.06
Human skin
0.98
PVC plastic
0.93
Polycarbonate
0.80
Oxidized copper
0.78
Rust
0.80
Paint
0.90
Soil
0.93
SURFACES WITH AN EMISSIVITY OF < 0.60 MAKE RELIABLE AND CONSISTENT
MEASUREMENTS PROBLEMATIC. THE LOWER THE EMISSIVITY, THE GREATER
POTENTIAL FOR ERROR WITHIN THE DEVICE’S CALCULATIONS. ERRORS MAY
STILL OCCUR EVEN WHEN ADJUSTMENTS ARE PERFORMED PROPERLY.
9-3 Non-uniformity Correction (NUC)
Non-uniformity correction (NUC) is used to compensate for the non-uniformity
of detector pixels or other optical interference. A common need for NUC
correction is to reduce excess noise in an image caused by rapid changes in
ambient temperature within an environment.
The T-Cam device features an automatic NUC operation. When performing a
correction operation, the user will hear a click from the device and the image
will freeze temporarily. The image may clear of some noise grain after the device
makes its adjustments.
