Temporal phase unwrapping: analysis of intensity, velocity and speckle decorrelation errors

Abundio Davila-Alvarez; Jonathan Mark Huntley; Guillermo H. Kaufmann

doi:10.1117/12.530014

19 November 2003 Temporal phase unwrapping: analysis of intensity, velocity and speckle decorrelation errors

Abundio Davila-Alvarez, Jonathan Mark Huntley, Guillermo H. Kaufmann

Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.530014
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

The temporal phase unwrapping algorithm (TPUA) can be interpreted as a phase accumulation process that can be reinitialized at specific time intervals. As a new reference can be taken after some pre-defined time, it is important to know how this time intervals influence the accuracy of the TPUA. An error analysis is then necessary to determine an optimum re-reference rate. This analysis has been carried out using three error sources: intensity, velocity, and speckle decorrelation. The small phase errors introduced by these error sources are accumulated along the time yielding total phase values that depend strongly on a re-reference rate. For the most common phase steeping algorithms, these errors are analyzed using a computer simulation of the speckle and experimental results confirm the expected results.

Citation Download Citation

Abundio Davila-Alvarez, Jonathan Mark Huntley, and Guillermo H. Kaufmann "Temporal phase unwrapping: analysis of intensity, velocity and speckle decorrelation errors", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.530014

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KEYWORDS

Error analysis

Speckle

Speckle pattern

Cameras

Computer simulations

Optics manufacturing

Phase shifts

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