Effect of Phase-Shifting Error on Deformation Evaluation Using Phase-Shifting Digital Holography
Phase-shifting technique is an effect way to suppress the zero order diffraction and the conjugate term in digital holography. However the phase-shifting error will influence inevitably the evaluation precision in practice operation. In this paper, the deformation evaluation errors by means of two kinds of four-step phase-shifting algorithms, which are in common use in digital holography, are analyzed and compared by computer simulation. In addition, the phase-shifting errors may cumulate or not according to different phase-shifting techniques, and both cases are considered in this paper. The results based on the digital in-line holography show that the two four-step phase-shifting algorithms possess different sensitivity to the phase-shifting errors, and the preferable one, which is more immune to the phase-shifting errors, is educed in conclusion.
Soon-Bok Lee and Yun-Jae Kim
X. Kang, X. Y. He, C. J. Tay, C. Quan, "Effect of Phase-Shifting Error on Deformation Evaluation Using Phase-Shifting Digital Holography", Key Engineering Materials, Vols. 326-328, pp. 27-30, 2006