19 December 2013 Application of the blind signal separation method for phase-shifting interferometry with random phase shifts
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Abstract
To deal with the problem of phase-shifting interefrometry with different unknown phase shifts, some special designed algorithms have been put forward by former researchers, such as the advanced iterative algorithm (AIA) and the principal component analysis (PCA) demodulation algorithms. This paper proposes a novel solution for it. Firstly, the captured phase-shifting interefrograms are differentiated to remove the additive background term. Then the trigonometric functions of the modulation phase can be extracted with the blind signal separation method. Simulations and experiments have been carried out to validate the feasibility of the proposed algorithm, where both open and closed fringe patterns are involved. Besides, the comparison results with the AIA and PCA algorithms are also provided.
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Fa Zeng, Fa Zeng, Huarong Gu, Huarong Gu, Qiaofeng Tan, Qiaofeng Tan, "Application of the blind signal separation method for phase-shifting interferometry with random phase shifts", Proc. SPIE 9046, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 90460R (19 December 2013); doi: 10.1117/12.2036107; https://doi.org/10.1117/12.2036107
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