Journal of Applied Optics, Volume. 43, Issue 3, 481(2022)

Angular uniformity of cascaded integrating sphere radiation source

Guangping ZHA1,2, Haoyu WU1、*, Jianjun LI1, and Yinlin YUAN1
Author Affiliations
  • 1Key Laboratory of Optical Calibration and Characterization, Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  • 2University of Science and Technology of China, Hefei 230026, China
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    In order to design and manufacture integrating sphere radiation sources with high angular uniformity, it is necessary to provide optimized design parameters. Based on the radiative transfer theory of cavity, a simulation model of light exitance distribution of light-emitting unit based on cascaded integrating sphere structure was established, and the relationship between the installation position of the Lambertian light-emitting unit and the angular uniformity of the cascaded integrating sphere radiation source was obtained. The simulation results showed that, in ideal conditions, when two Lambertian cascaded sub-spheres were used as light-emitting units and were symmetrically installed at an angle of 10° with the normal direction of the light outlet of the cascaded integrating sphere radiation source, the angular uniformity in the observation area at an angle of ±20° between the center of the sphere and the normal direction of the light outlet could reach the level of 0.03%. Finally, the angular uniformity of the cascaded integrating sphere radiation source at the 30° angle position of the cascaded sub-spheres was measured experimentally, and the experimental results were close to the simulation results. Therefore, by optimizing the type and installation position of the light-emitting unit, the angular uniformity of the integrating sphere radiation source could be effectively improved.

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    Guangping ZHA, Haoyu WU, Jianjun LI, Yinlin YUAN. Angular uniformity of cascaded integrating sphere radiation source[J]. Journal of Applied Optics, 2022, 43(3): 481

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    Paper Information

    Category: OPTICAL METROLOGY AND MEASUREMENT

    Received: Dec. 13, 2021

    Accepted: --

    Published Online: Jun. 7, 2022

    The Author Email: WU Haoyu (hywu@aiofm.ac.cn)

    DOI:10.5768/JAO202243.0303003

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