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Noniterative two-dimensional phase-retrieval method from two Fourier intensities by use of an exponential filter

机译:使用指数滤波器从两个傅立叶强度进行非迭代二维相位检索

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摘要

A noniterative method of retrieving the two-dimensional phase of a wave field from two intensity measurements is proposed. In the measurements, one records two far-field intensities of the wave field modulated and unmodulated with an exponential filter. The phase retrieval method is based on the solution of the simultaneous equations with unknown coefficients of the two-dimensional discrete Fourier transform for the phase. Then there is no need for the information about the wave field, which is used in iterative phase-retrieval methods. The usefulness of this method is shown in computer-simulated examples of the reconstruction of two-dimensional complex amplitude objects.
机译:提出了一种从两个强度测量值中检索波场二维相位的非迭代方法。在测量中,一个记录了用指数滤波器调制和未调制的波场的两个远场强度。相位检索方法基于二维离散傅立叶变换的未知系数的联立方程组的求解。这样就不需要在迭代相位检索方法中使用的有关波场的信息。在二维复振幅对象重建的计算机模拟示例中显示了该方法的有用性。

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    《Applied optics》 |2003年第14期|共6页
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