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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 6 — Mar. 14, 2011
  • pp: 5149–5155

Superfast multifrequency phase-shifting technique with optimal pulse width modulation

Yajun Wang and Song Zhang  »View Author Affiliations

Optics Express, Vol. 19, Issue 6, pp. 5149-5155 (2011)

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The technique of generating sinusoidal fringe patterns by defocusing squared binary structured ones has numerous merits for high-speed three-dimensional (3D) shape measurement. However, it is challenging for this method to realize a multifrequency phase-shifting (MFPS) algorithm because it is difficult to simultaneously generate high-quality sinusoidal fringe patterns with different periods. This paper proposes to realize an MFPS algorithm utilizing an optimal pulse width modulation (OPWM) technique that can selectively eliminate high-order harmonics of squared binary patterns. We successfully develop a 556 Hz system utilizing a three-frequency algorithm for simultaneously measuring multiple objects.

© 2011 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(320.7100) Ultrafast optics : Ultrafast measurements

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: January 10, 2011
Revised Manuscript: February 20, 2011
Manuscript Accepted: February 23, 2011
Published: March 3, 2011

Yajun Wang and Song Zhang, "Superfast multifrequency phase-shifting technique with optimal pulse width modulation," Opt. Express 19, 5149-5155 (2011)

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