On Mon, May 27, 2013 at 5:25 PM, Harry Veeder <[email protected]> wrote:
If they take emissivity = 1 then they are assuming the worst value for > emissivity at all wavelengths. How will a lower emissivity in any > range lead to an over estimation of power? > Joshua's position is that in the present measurements, the emissivity is implicitly taken into account twice when using an IR camera, and that in assuming that a high epsilon is conservative (in the first calculation), people are neglecting to see what effect it has on the calculated power in the second calculation. There are some subtleties that have to do with the processing software of the IR camera. He has explained this several times. I would be interested in a second opinion from someone familiar with IR cameras. Eric
