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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 29, Iss. 20 — Jul. 10, 1990
  • pp: 3012–3018

Fast profilometer for the automatic measurement of 3-D object shapes

Shouhong Tang and Yau Y. Hung  »View Author Affiliations


Applied Optics, Vol. 29, Issue 20, pp. 3012-3018 (1990)
http://dx.doi.org/10.1364/AO.29.003012


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Abstract

A fast technique for automatic 3-D shape measurement is proposed and verified by experiments. The technique, based on the principle of phase measurement of the deformed grating pattern which carries the 3-D information of the measured object, can automatically and accurately obtain the phase map or the height information of a measured object at every pixel point without assigning fringe orders and interpreting data in the regions between the fringe orders. Only one image pattern is sufficient for obtaining the phase map. In contrast to the fast Fourier transform based technique, the technique processes a fringe pattern in the real-signal domain instead of the frequency domain by using demodulation and convolution techniques, can process an arbitrary number of pixel points, and is much faster. Theoretical analysis, simulation results, and experimental results are presented.

© 1990 Optical Society of America

History
Original Manuscript: April 27, 1989
Published: July 10, 1990

Citation
Shouhong Tang and Yau Y. Hung, "Fast profilometer for the automatic measurement of 3-D object shapes," Appl. Opt. 29, 3012-3018 (1990)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-29-20-3012


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References

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