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Appendix: Emissivity
Emissivity: the radiant intensity launched from the object depends on the temperature
of the target and the object surface material’s radiation characteristic.
Emissivity table
Material
Emissivity
8-14µm
Aluminum oxidized
0.2-0.4
Asbestos
0.95
Asphalt
0.95
Basalt
0.7
Ceramic
0.95
Concrete
0.95
Copper oxidized 0.4-0.8
Fabric
0.95
Glass plate 0.85
Gold
0.01-0.1
Gravel
0.95
Ice
0.98
Iron oxidized
0.5-0.9
Karborundum
0.9
Lead Oxidized
0.2-0.6
Paper Each
color
0.95
Plastics Transparent>0.5mm
0.95
Rubber
0.95
Sand
0.9
Snow
0.9
Soil
0.9-0.98
Steel oxidized
0.7-0.9
Water
0.93
wood Natural 0.9-0.95
