UNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 650 NM RADIATION THERMOMETERS

This paper describes the uncertainty estimation of the size-of-source effect (SSE) measurement for the standard radiation thermometers in the indirect method using an integrating sphere with a black spot as the source. We checked the agreement between two processes of changing the black spot size and changing the aperture size. The SSE contributions of each uncertainty factors were analyzed.