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12 March 2020 Differences in calculation methods of effective emissivity of blackbody cavity
Yuxuan Ma, Guojin Feng
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Proceedings Volume 11438, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology; 114380P (2020) https://doi.org/10.1117/12.2548082
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China
Abstract
It is very difficult to directly measure the effective emissivity of a blackbody cavity, which is generally calculated by the indirect methods. Different calculation methods have certain differences. In this paper, the STEEP software, TRACEPRO software and approximation formula are used to calculate the effective emissivity of the blackbody cavity for the three commonly used blackbody models of integrating sphere, cylindrical and cylindrical-conical, and Compare the results of emissivity greater than 0.99. The results show that the consistency of the results of the three methods in calculating the cylindrical type and the integrating sphere type blackbody can be better than 0.03%. When calculating the conical black body, the difference between the results of the approximate formula and the other two schemes is less than 0.07%. The calculation results of the scheme tend to be consistent with the increase of the emissivity of the model.
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Yuxuan Ma and Guojin Feng "Differences in calculation methods of effective emissivity of blackbody cavity", Proc. SPIE 11438, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Imaging/Spectroscopy and Signal Processing Technology, 114380P (12 March 2020); https://doi.org/10.1117/12.2548082
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KEYWORDS
Black bodies
Integrating spheres
Optical spheres
Photometry
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