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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 19 — Jul. 1, 1997
  • pp: 4463–4472

Three-dimensional imaging based on Gray-code light projection: characterization of the measuring algorithm and development of a measuring system for industrial applications

G. Sansoni, S. Corini, S. Lazzari, R. Rodella, and F. Docchio  »View Author Affiliations


Applied Optics, Vol. 36, Issue 19, pp. 4463-4472 (1997)
http://dx.doi.org/10.1364/AO.36.004463


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Abstract

A three-dimensional (3-D) imaging system based on Gray-code projection is described; it is thought to be used as an integration to the already developed profilometer based on the projection of multifrequency gratings. The Gray-code method allows us to evaluate the 3-D profile of objects that present even marked discontinuities of the surface, thus increasing the flexibility of the measuring system as to the topology of the objects that can be measured. The basic aspects of Gray-code projection for 3-D imaging and profiling are discussed, with particular emphasis devoted to the study of the resolution of the method and to the analysis of the systematic errors. The results of this study allow us to determine the optimal setting of the parameters of the measurement and to develop a suitable calibration procedure. The procedures for implementing the Gray-code method are presented, and some interesting experimental results are reported. Calibration of the system reveals an accuracy of 0.2 mm, corresponding to 0.1% of the field of view.

© 1997 Optical Society of America

History
Original Manuscript: May 28, 1996
Revised Manuscript: October 17, 1996
Published: July 1, 1997

Citation
G. Sansoni, S. Corini, S. Lazzari, R. Rodella, and F. Docchio, "Three-dimensional imaging based on Gray-code light projection: characterization of the measuring algorithm and development of a measuring system for industrial applications," Appl. Opt. 36, 4463-4472 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-19-4463

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