Paper Title:
A High Precision Three-Dimensional Optical Sensor Using Fourier Transform Profilometry
  Abstract

Automatic measurement of an object shape is very important in solid modeling, machine vision, industrial inspection, and medical diagnostics, etc. We propose an optical sensor, which comprises a telecentric projector with a sinusoidal grating and a linear CCD camera. We use the FTP (Fourier transform profilometry) method to make a measurement on three-dimensional object. In the FTP method, a grating pattern projected onto the object surface is modulated by the height distribution of the object. The deformed fringe pattern is Fourier transformed and processed in the spatial frequency domain as well as in the space signal domain to demodulate the object shape from the main frequency component in the Fourier spectra. This optical sensor provides a rapid and non-invasive three-dimensional image acquisition. The repeatability is better than 5 µm within the 3σ limits.

  Info
Periodical
Key Engineering Materials (Volumes 295-296)
Edited by
Yongsheng Gao, Shuetfung Tse and Wei Gao
Pages
171-176
DOI
10.4028/www.scientific.net/KEM.295-296.171
Citation
H.Y. Sung, L.F. Tien, C.Y. Lin, C.Y. Lo, Y.R. Lin, Y.M. Lin, T.H. Tao, "A High Precision Three-Dimensional Optical Sensor Using Fourier Transform Profilometry", Key Engineering Materials, Vols. 295-296, pp. 171-176, 2005
Online since
October 2005
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$32.00
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