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

作者：Park Dae Seo; Beom Hoan O; Park Se Geun; Lee El Hang; Park Jaehyun; Lee Seung Gol^*

来源：Journal of the Optical Society of Korea, 2010, 14(2): 131-136.

DOI：10.3807/JOSK.2010.14.2.131

• Phase-shifting interferometry
• Phase retrieval technique
• Phase gradient vector

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.

• 出版日期2010-6