Int. J. Metrol. Qual. Eng.
Volume 8, 2017
|Number of page(s)||7|
|Published online||01 February 2017|
Study of the system responsivity to measure the blackbody's temperature by optical pyrometry from 1200 K to 1570 K
University of Carthage, National Institute of Applied Sciences and Technology, INSAT BP 676 Centre Urbain Nord,
Tunis Cedex, Tunisia
⁎ Corresponding author: email@example.com
Accepted: 1 December 2016
This work presents a method that has been recently adopted in our laboratory to determine the temperatures of blackbody sources in the range of 1200–1570 K. The system uses a Double Monochromator System (DMS) based on a grating and a prism as dispersion elements. The detection element was a silicon photodiode (Si-MMA), over which the spectral range from 800 nm to 900 nm has been used. Between the blackbody source and the DMS was placed an optical system consists of two convergent lenses. The system responsivity “G” was determined by the transmission factor of the optical system and the transmission factor of the DMS and the photodiode responsivity. The obtained results showed that the relative uncertainty of the system responsivity “G” varied from 0.3% to 1.12%. This in turn resulted in a corresponding uncertainty in temperature of about 2.2 K and 4.5 K (k = 1) over the evaluated temperature range. Although this uncertainty level was significantly high compared to those obtained by many other national metrology institutes, it was considered as a step forward in our laboratory to measure high temperatures.
Key words: temperature / pyrometry / system responsivity / detector / optical transmission
© S. Abbane et al., published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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