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Proceedings Paper

A novel one-dimensional phase-shift technique by using crossed fringe for phase measuring deflectometry
Author(s): Yuankun Liu; Evelyn Olesch; Zheng Yang; Gerd Häusler; Xianyu Su
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Paper Abstract

In principle, PMD needs the two components of the local surface gradient. Therefore a sequence of two orthogonal sinusoidal fringe patterns have to be displayed and captured separately. It is easy and convenient by using a digital display, but it will be much difficult to build a PMD system with mechanic gratings. In this paper, we present a novel phase-shift technique by using the cross fringe pattern, in which a one-dimensional N-phase shift allows for the acquisition of the two orthogonal phases, with only N exposures instead of 2N exposures. Therefore, it make PMD possible be implemented by a one-dimensional translation of the fringe pattern, instead of the common two-dimensional translation, which will be quite useful for certain applications.

Paper Details

Date Published: 4 March 2015
PDF: 7 pages
Proc. SPIE 9302, International Conference on Experimental Mechanics 2014, 93020X (4 March 2015); doi: 10.1117/12.2087101
Show Author Affiliations
Yuankun Liu, Sichuan Univ. (China)
Evelyn Olesch, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Zheng Yang, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Gerd Häusler, Friedrich-Alexander-Univ. Erlangen-Nürnberg (Germany)
Xianyu Su, Sichuan Univ. (China)

Published in SPIE Proceedings Vol. 9302:
International Conference on Experimental Mechanics 2014
Chenggen Quan; Kemao Qian; Anand Asundi; Fook Siong Chau, Editor(s)

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