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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 21 — Oct. 21, 2013
  • pp: 24873–24878

Coherent digital demodulation of single-camera N-projections for 3D-object shape measurement: Co-phased profilometry

M. Servin, G. Garnica, J. C. Estrada, and A. Quiroga  »View Author Affiliations

Optics Express, Vol. 21, Issue 21, pp. 24873-24878 (2013)

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Fringe projection profilometry is a well-known technique to digitize 3-dimensional (3D) objects and it is widely used in robotic vision and industrial inspection. Probably the single most important problem in single-camera, single-projection profilometry are the shadows and specular reflections generated by the 3D object under analysis. Here a single-camera along with N-fringe-projections is (digital) coherent demodulated in a single-step, solving the shadows and specular reflections problem. Co-phased profilometry coherently phase-demodulates a whole set of N-fringe-pattern perspectives in a single demodulation and unwrapping process. The mathematical theory behind digital co-phasing N-fringe-patterns is mathematically similar to co-phasing a segmented N-mirror telescope.

© 2013 OSA

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.4630) Instrumentation, measurement, and metrology : Optical inspection
(120.5050) Instrumentation, measurement, and metrology : Phase measurement

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 5, 2013
Revised Manuscript: September 11, 2013
Manuscript Accepted: September 18, 2013
Published: October 10, 2013

M. Servin, G. Garnica, J. C. Estrada, and A. Quiroga, "Coherent digital demodulation of single-camera N-projections for 3D-object shape measurement: Co-phased profilometry," Opt. Express 21, 24873-24878 (2013)

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