Approaches in generalized phase shifting interferometry

Patil, Abhijit; Rastogi, Pramod K.

doi:10.1016/j.optlaseng.2004.05.005

Cited by 56 publications

(14 citation statements)

References 24 publications

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“…These algorithms in general can be broadly classified to fall into two categories: conventional and generalized. While the step widths are typically multiples of p/2, in the former case, these are arbitrary in the latter case [60][61][62].…”

Section: Moving Ahead With Phasementioning

confidence: 99%

Moving ahead with phase

Patil

Rastogi

2007

Optics and Lasers in Engineering

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Section: Moving Ahead With Phasementioning

confidence: 99%

Moving ahead with phase

Patil

Rastogi

2007

Optics and Lasers in Engineering

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“…The technique functions primarily by acquiring a number of intensity images with phase increments between successive frames. Even in the case of a single PZT, these algorithms impose the selection of a particular value of the phase step in order to minimize some of the systematic errors such as the presence of harmonics, PZT miscalibration, or the detector non-linearity [5][6]. Although three frames are normally sufficient to compute the phase distribution, the measurement process is sensitive to various systematic and random errors [1][2].…”

Section: Introductionmentioning

confidence: 99%

Estimation Techniques in Phase Shifting Interferometry

Patil¹,

Langoju²,

Rastogi³

et al. 2010

AIP Conference Proceedings

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Measurement of phase of interfered beams in interferometry has been a topic of immense interest for quantifying various physical parameters of interests such as displacement, deformation, or shape of an object under investigation. Several approaches have been employed to measure these parameters and one such approach based on estimation technique has proved to be efficient to measure these quantities of interest. These estimation techniques primarily measure the phase step imparted to the piezoelectric device placed in path of one of the beams in an interferometry setup. Interestingly, these techniques also exhibit the capability of simultaneously measuring dual phase steps of two piezoelectric devices, in the configuration involving four-beam interferometry. Measurement of phase in two-beam interferometry or multiple phases in four-beam interferometry using piezoelectric devices is susceptible to several systematic and random sources of errors. In such cases, estimation techniques have shown to be effective. This paper presents a mathematical framework of various high-resolution estimation techniques based on spectral decomposition that have been proposed till now in phase shifting interferometry, and are effective in estimating the phase steps.

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“…The concept of phase shifting interferometry (PSI) makes possible the measurement of phase in interferograms with high accuracy [1,2]. The PSI techniques are usually based on controllable changing the path length of reference wave in interferometer with recording of a set of phase shifted fringe patterns.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Wavefront Evaluation in Phase Shifting Interferometry Based on Recurrence Fringe Processing

Gurov¹,

Volynsky²,

Воробьева³

et al. 2010

AIP Conference Proceedings

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The method of recovering 3D unwrapped phase distribution in phase shifting interferometry is investigated. The method is based on dynamic recurrence processing of a set of fringe patterns involving the Kalman filtering algorithm with 3D spatial-temporal prediction of fringe parameters. The advantage of the suggested algorithm consist in dynamic evaluation of wavefront full phase with highest phase accuracy at the last phase shift step.

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Approaches in generalized phase shifting interferometry

Cited by 56 publications

References 24 publications

Moving ahead with phase

Moving ahead with phase

Estimation Techniques in Phase Shifting Interferometry

Dynamic Wavefront Evaluation in Phase Shifting Interferometry Based on Recurrence Fringe Processing

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