Etchepareborda Pablo, Bianchetti Arturo, Vadnjal Ana Laura, Federico Alejandro, Kaufmann Guillermo H
Appl Opt. 2014 Oct 20;53(30):7120-8. doi: 10.1364/AO.53.007120.
A simplified method for object phase recovering is implemented in temporal speckle pattern interferometry when the employed interferometer admits the introduction of a temporal carrier, and the well-known two-beam interferometry equation is verified. The spatiotemporal evolution of the object phase is isolated by modulating the acquired interferometric intensity signals with a known temporal carrier in order to carry out its analysis by using a bivariate empirical mode decomposition framework that avoids the application of the Hilbert transform, which is not suitable for intensity signals with abrupt fluctuations. The advantages and limitations of this technique are analyzed and discussed by comparing computation time and phase recovery capability with well-known phase-retrieval methods by means of numerical simulations and experimental data.
当所采用的干涉仪允许引入时间载波时，在时间散斑图案干涉测量中实现了一种用于物体相位恢复的简化方法，并验证了著名的双光束干涉测量方程。通过用已知的时间载波调制采集到的干涉强度信号，来分离物体相位的时空演化，以便使用二元经验模式分解框架对其进行分析，该框架避免了应用希尔伯特变换，因为希尔伯特变换不适用于具有突变波动的强度信号。通过数值模拟和实验数据，将该技术的计算时间和相位恢复能力与著名的相位检索方法进行比较，分析和讨论了该技术的优点和局限性。
