Journals / ICCES / Vol.23, No.1
Table of Content

Research Article


Phase analysis for out-of-plane displacement measurement using laser lines generated in camera with diffraction grating

Wei Jiang1,*, Takuya Hara1, Motoharu Fujigaki1
1 Graduate School of Engineering, University of Fukui, 3-9-1 Bunkyo, Fukui and 910-8507, Japan.
* Corresponding Author: Wei Jiang. Email:


In this study, a sampling moire method in which parallel laser lines were generated in a camera using a diffraction grating was proposed. A green laser of line projection function, a diffraction grating and an industrial camera were used as an experimental device. Object images with laser line projection before and after displacement were taken by the camera. Displacements that calculated by a sampling moire method and a method of averaging center-ofgravity were be compared. Results show that the proposed method is more precision than method of averaging center-of-gravity.


Displacement measuring; Phase analysis; Diffraction grating; Sampling moire method; Light-section method; Laser line
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