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Applied Optics

Applied Optics


  • Vol. 22, Iss. 24 — Dec. 15, 1983
  • pp: 3977–3982

Fourier transform profilometry for the automatic measurement of 3-D object shapes

Mitsuo Takeda and Kazuhiro Mutoh  »View Author Affiliations

Applied Optics, Vol. 22, Issue 24, pp. 3977-3982 (1983)

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A new computer-based technique for automatic 3-D shape measurement is proposed and verified by experiments. In contrast to the moire contouring technique, a grating pattern projected onto the object surface is Fourier-transformed and processed in its spatial frequency domain as well as in its space-signal domain. This technique has a much higher sensitivity than the conventional moire technique and is capable of fully automatic distinction between a depression and an elevation on the object surface. There is no requirement for assigning fringe orders and interpolating data in the regions between contour fringes. The technique is free from errors caused by spurious moire fringes generated by the higher harmonic components of the grating pattern.

© 1983 Optical Society of America

Original Manuscript: August 9, 1983
Published: December 15, 1983

Mitsuo Takeda and Kazuhiro Mutoh, "Fourier transform profilometry for the automatic measurement of 3-D object shapes," Appl. Opt. 22, 3977-3982 (1983)

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