Study on the calibration technique for multi-directional affine projection in optical computerized tomography

Zhenyan Guo; Jia Wang; Yue Zhu; Renhui Guo

doi:10.1117/12.2504857

18 January 2019 Study on the calibration technique for multi-directional affine projection in optical computerized tomography

Zhenyan Guo, Jia Wang, Yue Zhu, Renhui Guo

Author Affiliations +

Proceedings Volume 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment; 1083908 (2019) https://doi.org/10.1117/12.2504857
Event: Ninth International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT2018), 2018, Chengdu, China

Abstract

Researching the combustion process is important core contents in aviation, aerospace and energy engineering. And it has an important significance for the combustion researches to measure the physics parameters by combustion diagnosis and to acquire the 3D transient combustion distribution. Optical computerized tomography (OCT) applied in combustion diagnosis plays an important role in flow field diagnosis for its advantages of non-contact, real time, and 3D full-field measurements. The essence of CT is reconstructing the test field with projections from different directions. And the projections are independent to each other. Therefore, a multi-direction projections calibration should be performed before CT reconstruction, which can remap different projections to a unified coordinate to reduce the system errors from the installations and optical elements. Aiming at this problem, in this project, a multi-direction calibration method based on affine projection is proposed. By studying the affine projection theory, the calibration model was build based on single directional moiré tomographic system. Furthermore, the corresponding algorithm based on the calibration model is proposed. Finally, a multi-directional moiré tomographic system is built and combining with the calibration results for remapping the multi-directional projections, the 3D temperature distribution of the propane combustion flame was reconstructed.

Citation Download Citation

Zhenyan Guo, Jia Wang, Yue Zhu, and Renhui Guo "Study on the calibration technique for multi-directional affine projection in optical computerized tomography", Proc. SPIE 10839, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test, Measurement Technology, and Equipment, 1083908 (18 January 2019); https://doi.org/10.1117/12.2504857

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