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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 10,
  • Issue 3,
  • pp. 031201-
  • (2012)

Linear sinusoidal phase-shifting method resistant to non-sinusoidal phase error

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Abstract

Non-sinusoidal phase error is common in structured light three-dimensional (3D) shape measurement system, thus we perform theoretical and experimental analyses of such error. The number of non-sinusoidal waveform errors in a 2π phase period is the same as the number of steps of the phase-shifting algorithm; no errors occur within the one-phase period. Based on our findings, a new structured light method, the linear sinusoidal phase-shifting method (LSPS), that is resistant to non-sinusoidal phase error is proposed. Experiments show that the non-sinusoidal waveform error is reduced to an almost negligible level (0.001 rad) using the proposed LSPS.

© 2012 Chinese Optics Letters

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