Abstract
Radiation thermometry of low emissivity metals near room temperature is very difficult because of the weak radiance from a target and the disturbance of abundant background radiation noise. Directional and polarized emissivities of glossy metals are studied theoretically and experimentally. The p-polarized emissivities of them are found to be quite high at the direction of more than 80°. On this basis, the principle of a simultaneously measuring method of emissivity and temperature is proposed. The experimental results of the method showed the temperature measurement was achieved within the error of ±3K at the laboratory. Considerations on the practical use of this method are mentioned and the limitations of the method are also discussed.
