Two-step demodulation based on the Gram-Schmidt orthonormalization method

Javier Vargas

doi:10.1364/OL.37.000443

Two-step demodulation based on the Gram-Schmidt orthonormalization method

2012-02-01

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Carlos Óscar S. Sorzano

DOI：10.1364/OL.37.000443

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This Letter presents an efficient, fast, and straightforward two-step demodulating method based on a Gram-Schmidt (GS) orthonormalization approach. The phase-shift value has not to be known and can take any value inside the range (0, 2 pi)excluding the singular case, where it corresponds to pi. The proposed method is based on determining an orthonormalized interferogram basis from the two supplied interferograms using the GS method. We have applied the proposed method to simulated and experimental interferograms, obtaining satisfactory results. A complete MATLAB software package is provided at http://goo.gl/IZKF3. (C) 2012 Optical Society of America

Keyword:

PHASE-SHIFTING INTERFEROMETRY

ALGORITHM

Two-step demodulation based on the Gram-Schmidt orthonormalization method

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