Theoretical analysis of volume moiré tomography based on double orthogonal gratings for real 3D flow fields diagnosis

Nan Sun; Yang Song; Jia Wang; Zhen-hua Li; An-zhi He

doi:10.1117/12.2000706

26 November 2012 Theoretical analysis of volume moiré tomography based on double orthogonal gratings for real 3D flow fields diagnosis

Nan Sun, Yang Song, Jia Wang, Zhen-hua Li, An-zhi He

Author Affiliations +

Proceedings Volume 8556, Holography, Diffractive Optics, and Applications V; 85561O (2012) https://doi.org/10.1117/12.2000706
Event: Photonics Asia, 2012, Beijing, China

Abstract

Moiré tomography is an important technique to diagnose the flow field. However, the traditional moiré deflectometry cannot meet the requirements of Volume Moiré Tomography (VMT). In this Letter, an improved moiré deflected system based on double orthogonal gratings is introduced for real 3-D reconstruction. The proposed method could obtain the first-order partial derivatives in two vertical directions of the projection in one time. Comparing with the traditional moiré deflectometry, the proposed system is more effective and easier to realize the multi-direction data acquisition.

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Nan Sun, Yang Song, Jia Wang, Zhen-hua Li, and An-zhi He "Theoretical analysis of volume moiré tomography based on double orthogonal gratings for real 3D flow fields diagnosis", Proc. SPIE 8556, Holography, Diffractive Optics, and Applications V, 85561O (26 November 2012); https://doi.org/10.1117/12.2000706

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KEYWORDS

Deflectometry

Tomography

3D acquisition

Radon

Data acquisition

Optical filters

Diagnostics

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