FLIR DM286 - Appendices; Emissivity Factors for Common Materials; Non-Uniformity Correction

FLIR DM286 USER MANUAL Document Identifier: DM286-en-US_AA
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12. Appendices
12.1 Emissivity Factors for Common Materials
12.2 Non-Uniformity Correction
A non-uniformity correction (or NUC) is an image correction carried out by the camera software
to compensate for different sensitivities of detector elements and other optical and
geometrical disturbances
1
.
The NUC is an automatic function that takes place periodically (approximately every 2-3
minutes) or whenever the inner core of the cameral detects a ±3.6
o
F (2
o
C) temperature
change. The term calibrating… will appear at the top of the display while this correction is
active.
1. Definition from the imminent international adoption of DIN 54190-3 (Non-destructive testing – Thermographic testing – Part 3: Terms and
definitions).
Material Emissivity Material Emissivity
Asphalt 0.90 to 0.98 Cloth (black) 0.98
Concrete 0.94 Skin (human) 0.98
Cement 0.96 Leather 0.75 to 0.80
Sand 0.90 Charcoal (powder) 0.96
Soil 0.92 to 0.96 Lacquer 0.80 to 0.95
Water 0.92 to 0.96 Lacquer (matt) 0.97
Ice 0.96 to 0.98 Rubber (black) 0.94
Snow 0.83 Plastic 0.85 to 0.95
Glass 0.90 to 0.95 Timber 0.90
Ceramic 0.90 to 0.94 Paper 0.70 to 0.94
Marble 0.94 Chromium Oxides 0.81
Plaster 0.80 to 0.90 Copper Oxides 0.78
Mortar 0.89 to 0.91 Iron Oxides 0.78 to 0.82
Brick 0.93 to 0.96 Textiles 0.90