Automatic analysis of interferograms: the issue of phase shifter calibration

Bartosz Zielinski; Krzysztof Patorski

doi:10.1117/12.714800

12 October 2006 Automatic analysis of interferograms: the issue of phase shifter calibration

Bartosz Zielinski, Krzysztof Patorski

Proceedings Volume 6347, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006; 63471M (2006) https://doi.org/10.1117/12.714800
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006, 2006, Wilga, Poland

Abstract

Regardless of the time passing by the Temporal Phase Shifting (TPS) method is still one of the most commonly used interferometric techniques of automatic interferogram data acquisition and analysis. It is known to be accurate and reliable. The main assumption of TPS is that a set of images acquired has a phase difference due to a perfectly implemented phase shift only. Several calibration algorithms used are modifications of the Carre algorithm. This paper focuses on the implementation and numerical analysis of the calibration algorithm proposed by Chen et al. It is based on seeking the maximum and minimum intensity values. This approach is less restrictive because it does not require any knowledge of the phase shifter performance or establishing a special phase distribution in an interferogram. Its overall robustness is expected to be better, especially in view of in situ calibration conducted before every measurement.

Citation Download Citation

Bartosz Zielinski and Krzysztof Patorski "Automatic analysis of interferograms: the issue of phase shifter calibration", Proc. SPIE 6347, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2006, 63471M (12 October 2006); https://doi.org/10.1117/12.714800

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