Bernini María Belén, Federico Alejandro, Kaufmann Guillermo H
Instituto de Física Rosario, Argentina. bernini@ifir‐conicet.gov.ar
Appl Opt. 2011 Feb 10;50(5):641-7. doi: 10.1364/AO.50.000641.
We propose a phase measurement technique to retrieve optical phase distributions coded in noisy temporal speckle pattern interferometry signals presenting regions of adjacent low-modulated pixels, which is based on the bidimensional empirical mode decomposition and the Hilbert transform. It is shown that this approach can effectively remove noise and minimize the influence of large sets of adjacent nonmodulated pixels located in the time series of speckle interferograms. The performance of the phase retrieval approach is analyzed using computer-simulated speckle interferograms modulated with a temporal carrier. The results are also compared with those given by a technique based on the one-dimensional empirical mode decomposition. The advantages and limitations of the proposed approach are finally discussed.
我们提出了一种相位测量技术，用于从存在相邻低调制像素区域的噪声时间散斑图案干涉测量信号中检索编码的光学相位分布，该技术基于二维经验模态分解和希尔伯特变换。结果表明，这种方法可以有效去除噪声，并最小化散斑干涉图时间序列中大量相邻未调制像素的影响。使用由时间载波调制的计算机模拟散斑干涉图分析了相位检索方法的性能。还将结果与基于一维经验模态分解的技术给出的结果进行了比较。最后讨论了所提出方法的优点和局限性。
