Automatic real-time generalized phase-shifting interferometry to process interferograms with spatio-temporal visibility

Rigoberto Juarez-Salazar; Carlos Robledo-Sanchez; Cruz Meneses-Fabian; Gustavo Rodriguez-Zurita; Fermin Guerrero Sanchez; Antonio Barcelata-Pinzon

doi:10.1117/12.2026103

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18 November 2013 Automatic real-time generalized phase-shifting interferometry to process interferograms with spatio-temporal visibility

Rigoberto Juarez-Salazar, Carlos Robledo-Sanchez, Cruz Meneses-Fabian, Gustavo Rodriguez-Zurita, Fermin Guerrero Sanchez, Antonio Barcelata-Pinzon

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Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 878542 (2013) https://doi.org/10.1117/12.2026103
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

A faster and robust generalized phase-shifting interferometry suitable to automatic real-time applications is presented. The proposal is based on the parameter estimation by the least squares method. The algorithm can retrieve the wrapped phase from two or more phase shifted interferograms with unknown phase steps between 0 and π rad. Moreover, by the multiple or single parameter estimation approach of this algorithm, interferograms with variable visibility both spatial and temporally can be processed, overcoming the restrictions and drawbacks from usual variable spatial visibility approaches. By both computer simulation and a optical experiment, the algorithm's feasibility is illustrated.

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Rigoberto Juarez-Salazar, Carlos Robledo-Sanchez, Cruz Meneses-Fabian, Gustavo Rodriguez-Zurita, Fermin Guerrero Sanchez, and Antonio Barcelata-Pinzon "Automatic real-time generalized phase-shifting interferometry to process interferograms with spatio-temporal visibility", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 878542 (18 November 2013); https://doi.org/10.1117/12.2026103

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