spectral emissivity
spectral emissivity
(OP)
Hi
Where can I get the spectral emissivity of materials like water, glass,asphalt, etc?
Thanks
Where can I get the spectral emissivity of materials like water, glass,asphalt, etc?
Thanks
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RE: spectral emissivity
http:
which can be found through websearching.
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RE: spectral emissivity
My question is referred with emissivity vs wavelenght for the 3 to 5 and 8 to 14 micrometers atmospheric windows
RE: spectral emissivity
The most important thing to remember, however, is that radiometric measurements made under field (rather than lab) conditons are typically HIGHLY inaccurate when the emissivity correction is below approximately 0.6, i.e. all metals that are not coated or extremely oxidized. Unfortunately camera manufactures are not forthcoming with this fact.
If you need to convince yourself of what I am suggesting, take any coins you have in your pocket, put them in pan and heat them to approximately 100C. Try to measure their temperature from several different vantage points using the emissivity correction values you've found in the tables. It is hopeless.
Another great site for information about this topic is:
http://www.temperatures.com
If I can be of further assistance, please feel free to contact me.
If I can be of further assistance, please feel free to contact me.
John Snell
Snell Infrared
http://www.snellinfrared.com
RE: spectral emissivity
So far is the best methot I personally know to meter temperature in metals and some polished surfaces.
A nice place (in Spanish) to get information is: http:
I hope it helps,
Lucitano