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21 June 2019 Contrast determination in phase-shifting algorithms for interferograms with arbitrary steps and additive noise
Gastón A. Ayubi
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Proceedings Volume 11056, Optical Measurement Systems for Industrial Inspection XI; 1105645 (2019) https://doi.org/10.1117/12.2525945
Event: SPIE Optical Metrology, 2019, Munich, Germany
Abstract
Phase-shifting (PS) is a well-established technique for phase retrieval in interferometry that requires a series of intensity measurements with known or unknown phase-steps. Contrast information is useful for evaluating the quality of the collected data. The objective of this work is determinate an algorithm to calculate the contrast function in the case of arbitrarily spaced phase steps.
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Gastón A. Ayubi "Contrast determination in phase-shifting algorithms for interferograms with arbitrary steps and additive noise", Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 1105645 (21 June 2019); https://doi.org/10.1117/12.2525945
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KEYWORDS
Phase shifts
Interferometry
Phase retrieval
Fringe analysis
Phase measurement
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