Quantitative detection and compensation of phase-shifting error in two-step phase-shifting digital holography |
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Authors: | W. Chen C.J. Tay Y. Fu |
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Affiliation: | Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore |
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Abstract: | Phase-shifting digital holographic technique is a powerful tool for the measurement of various physical parameters, such as object deformation and liquid or cell’s refractive index change. However, for an accurate measurement, phase-shifting error in the reference wave path is still a major issue. In this paper, three novel and simple algorithms are proposed to quantitatively detect and correct phase-shifting error for a pure phase object in two-step phase-shifting digital holography. Influence of phase-shifting error is illustrated, and the effectiveness of the proposed algorithms is demonstrated by numerical simulation results. |
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Keywords: | 42.25.Hz 42.30.Kq 42.40.&minus i 42.40.Lx 42.87.Bg |
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