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Applied Optics

Applied Optics


  • Vol. 25, Iss. 10 — May. 15, 1986
  • pp: 1630–1633

Automatic profilometry of 3-D diffuse objects by spatial phase detection

Satoru Toyooka and Yuuji Iwaasa  »View Author Affiliations

Applied Optics, Vol. 25, Issue 10, pp. 1630-1633 (1986)

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A method automatically processing a projected grating to profile a 3-D diffuse object is proposed. A deformed grating pattern projected on the object is regarded as a phase modulated pattern with a constant spatial carrier frequency. To retrieve phase modulation, acquired data in a microcomputer are sinusoidally fitted using a phase detection algorithm similar to that used in communication techniques. High sensitivity measurements of height distribution can be done using simple optical geometry. Random and systematic errors inherent in the method are discussed in detail.

© 1986 Optical Society of America

Original Manuscript: September 16, 1985
Published: May 15, 1986

Satoru Toyooka and Yuuji Iwaasa, "Automatic profilometry of 3-D diffuse objects by spatial phase detection," Appl. Opt. 25, 1630-1633 (1986)

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