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Spatial resolution of light field sectioning pyrometry for flame temperature measurement

Liu, Yudong, Zhu, Mingjuan, Wang, Tianxiang, Lei, Gang, Hossain, Md. Moinul, Zhang, Biao, Li, Jian, Xu, Chuanlong (2021) Spatial resolution of light field sectioning pyrometry for flame temperature measurement. Optics and Lasers in Engineering, 140 . Article Number 106545. ISSN 0143-8166. (doi:10.1016/j.optlaseng.2021.106545) (KAR id:85621)

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The light field sectioning pyrometry (LFSP) has proven a significant advancement for in-situ measurement of flame temperature through a single light field camera. However, the spatial resolution of LFSP is limited, which severely inhibits the measurement accuracy. This paper aims to evaluate the spatial resolution of LFSP for flame temperature measurement quantitatively. A theoretical model of the spatial resolution is established based on optical parameters and point spread function of the light field camera. The spatial resolution is then numerically analyzed with different parameters of light field cameras. Based on the theoretical model, a novel cage-typed light field camera with a higher spatial resolution of LFSP is developed and experimentally evaluated. A significant improvement of spatial resolution about 17% and 50% in lateral and depth directions, respectively, is achieved. Results show that the spatial resolution is in good agreement with the theoretical model. The LFSP is then evaluated under different combustion cases and their temperatures are reconstructed.

Item Type: Article
DOI/Identification number: 10.1016/j.optlaseng.2021.106545
Additional information: Unmapped bibliographic data: DA - 2021/05/01/ [EPrints field already has value set] JO - Optics and Lasers in Engineering [Field not mapped to EPrints]
Uncontrolled keywords: Flame temperature measurement, Spatial resolution, Light field imaging, Optical sectioning, 3D reconstruction
Subjects: Q Science
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Depositing User: Moinul Hossain
Date Deposited: 22 Jan 2021 23:22 UTC
Last Modified: 21 Jan 2022 00:00 UTC
Resource URI: (The current URI for this page, for reference purposes)
Hossain, Md. Moinul:
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