Abstract
For a correct determination of the size-of-source effect (SSE), it is necessary to use a large (e.g., 50-mm diameter) radiation source of uniform spectral radiance. The non-uniformity of the source can be an important component of the uncertainty because it is difficult to obtain sources with good uniformity over the whole aperture. In the indirect method to measure the SSE, the component due to the source non-uniformity comes from the measurement of S(L,∞), usually measured outside the spot that blocks radiation from the radiation thermometer target. By expressing the SSE as an experimental sum of successive contributions of radiating rings at the source aperture, the uncertainty due to the non-uniformity can be reduced. In this article, the calculus of the SSE and its uncertainty for the usual equation is compared with the calculus based on an experimental equation that considers the SSE as a sum of the contributions from radiating rings.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Yoon, H.W., Allen, D.W., Saunders, R.D.: Metrologia 42, 89 (2005)
P. Bloembergen, Y. Duan, R. Bosma, Z. Yuan, in Proceedings of TEMPMEKO ’96, 6th International Symposium on Temperature and Thermal Measurements in Industry and Science, ed. by P. Marcarino (Levrotto and Bella, Torino, 1997), pp. 261–266, ISBN 8882180999
G. Machin, R. Sergienko, in Proceedings of TEMPMEKO 2001, 8th International Symposium on Temperature and Thermal Measurements in Industry and Science, ed. by B. Fellmuth, J. Seidel, G. Scholz (VDE Verlag, Berlin, 2002), pp. 155–160, ISBN 3800726769
Saunders, P.: Metrologia 40, 93 (2003)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Martín, M.J., Pérez, J.P. & Chimenti, V. An Alternative Calculation of the Size-of-Source Effect Uncertainty for Non-uniform Sources. Int J Thermophys 29, 1131–1140 (2008). https://doi.org/10.1007/s10765-008-0405-1
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10765-008-0405-1