07:42 Mar-15-2000 Vasco Teixeira R & D, coatings production and inspection, stress analysi University of Minho - Physics Centre, Portugal, Joined Feb 2000 3
Measurement very low emissivity in coatings and surfaces
I am looking for a simple equipment that measures directly the surface emissivity of thin coatings deposited on glass, aluminium or copper. The application is for quality inspection sputtered solar absorbers to be used in thermal collectors for water heating. At 100 degress celsius the emissivity is about 0.05. The epsilon range should be up to 0.5 or more. The IR wavelenght should be the correspondent of 100 degrees up to 500 or more.