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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 14,
  • Issue 2,
  • pp. 131-136
  • (2010)

Noise-robust Phase Gradient Retrieval Formulation for Phase-shifting Interferometry

Open Access Open Access

Abstract

Modification of the phase gradient formulation is proposed in order to make phase retrieval less susceptible to noise. The modified formulation is derived from separation of the phase terms and the intensity modulation terms of interferograms, and subsequent differentiation to reduce the noise-induced error of the phase gradient vector. Its performance is evaluated and compared to that of the conventional formulation, and noise-robust nature is confirmed.

© 2010 Optical Society of Korea

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