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Proceedings Paper

Random two-step phase estimation based on Lissajous ellipse fitting method with light source intensity instability
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Paper Abstract

The fringe projection technique is an effective technique to measure 3D shape of objects, in which phase retrieval is an important procedure. In this paper, the phase extraction algorithm of random phase-shift, which can be used in the fluctuating light source and the non-uniform background intensity and modulation amplitude, is proposed. The proposed method can retain more details of reconstructed phase than Fourier transform profilometry. Compared with multi-frame phase-shifting method, the proposed method only needs two fringe patterns to extract the phase and phase shift of the object. Our method consists of two stages. Firstly, the method is built based upon Lissajous Ellipse Fitting technique that extracts the phase from only two phase-shifted fringes which may contain arbitrary and unknown phase shift in dynamic measurement experiment. Second, the non-uniform background intensity and modulation amplitude are removed. The simulation results demonstrate that the proposed method can effectively obtain the phase.

Paper Details

Date Published: 18 November 2019
PDF: 8 pages
Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 111890W (18 November 2019); doi: 10.1117/12.2538785
Show Author Affiliations
Jinjin Zhu, Xidian Univ. (China)
Yuxiang Wu, Xidian Univ. (China)
Yashuo Bai, Xidian Univ. (China)
Wei Li, Xidian Univ. (China)
Xiaopeng Shao, Xidian Univ. (China)

Published in SPIE Proceedings Vol. 11189:
Optical Metrology and Inspection for Industrial Applications VI
Sen Han; Toru Yoshizawa; Song Zhang; Benyong Chen, Editor(s)

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