Abstract
The effect of the port fraction on the radiant flux of the integrating cavity is investigated. A theoretical model of the light propagation in an arbitrary-shaped integrating cavity was established. The relationship between port fraction, radiant flux and diffuse reflectance is derived and experimentally verified in the absence of gas absorption. Based on this relationship, we propose a method to measure the diffuse reflectance of the integrating cavity and find that the method can reduce the effect of light source fluctuations on the measurement.
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Acknowledgements
This work was supported by the National Key Research and Development Program of China (2016YFF0102803).
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Zhiyang Sun: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Resources, Data curation, Writing- Original draft preparation. Yongda Wang: Validation, Data curation. Zhiguo Zhang: Conceptualization, Methodology, Supervision.
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Sun, Z., Wang, Y. & Zhang, Z. Effect of port fraction on the radiant flux of the integrating cavity. Appl. Phys. B 129, 102 (2023). https://doi.org/10.1007/s00340-023-08050-7
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DOI: https://doi.org/10.1007/s00340-023-08050-7