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Title: Analysis of phase distortion in phase-shifted fringe projection
Authors: Miao, H. 
Quan, C. 
Tay, C.J. 
Fu, Y. 
Keywords: Continuous wavelet transform (CWT)
Fringe projection
Phase distortion
Phase shifting
Issue Date: Feb-2007
Citation: Miao, H., Quan, C., Tay, C.J., Fu, Y. (2007-02). Analysis of phase distortion in phase-shifted fringe projection. Optics and Lasers in Engineering 45 (2) : 318-325. ScholarBank@NUS Repository.
Abstract: This paper describes the analysis of phase distortion in phase-shifted fringe projection method. A phase distortion occurs when the phase shifting technique is applied to extract the phase values from projected fringe patterns in surface contouring. The phase distortion will induce measurement errors especially in the measurement of micro-components. The cause of such phase distortion is investigated and the influence of phase distortion on the measurement of micro-components is discussed. To eliminate the phase distortion, a continuous wavelet transform (CWT) is employed to extract phase values from object surface modulated fringe patterns. Principle of the proposed CWT phase extraction method is described and experiments are conducted to verify the proposed method. It is shown that by the use of CWT phase extraction method phase distortion induced in conventional phase-shifting technique can be completely eliminated. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Optics and Lasers in Engineering
ISSN: 01438166
DOI: 10.1016/j.optlaseng.2005.12.008
Appears in Collections:Staff Publications

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