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arXiv 1709.09727physics.optics
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瑞利-索末菲衍射是否总是高速衍射算法的精确参考?

Is the Rayleigh-Sommerfeld diffraction always an exact reference for high speed diffraction algorithms?

Soheil Mehrabkhani, Thomas Schneider

摘要:

在光学和光子学的几个领域,如波传播、数字全息术、全息显微术、衍射成像、生物医学成像和衍射光学,电磁波的行为必须通过计算方法用衍射的标量理论来计算。基于快速傅立叶变换的这些高速衍射算法中的许多在原理上是瑞利-索末菲衍射(RSD)理论的近似。然而,为了研究它们的数值精度,它们应该与RSD进行比较和验证。所有的数值模拟原则上都是基于模拟连续场的采样。在这篇文章中,我们证明了一个新的有效性条件,以及RSD中的采样,这使得系统的处理RSD中的可能。我们显示的基本限制,由于这个条件和它的违反所造成的异常。我们还证明,通过低于阿贝分辨率限制的采样,可以完全消除这些限制。此外,我们提出了一个非常普遍的统一的方法,适用于RSD的有效域以外的正向和反向计算相结合。

英文摘要:

In several areas of optics and photonics like wave propagation, digital holography, holographic microscopy, diffraction imaging, biomedical imaging and diffractive optics, the behavior of the electromagnetic waves has to be calculated with the scalar theory of diffraction by computational methods. Many of these high speed diffraction algorithms based on a fast Fourier transformation are in principle approximations of the Rayleigh-Sommerfeld Diffraction (RSD) theory. However, to investigate their numerical accuracy, they should be compared with and verified by RSD. All numerical simulations are in principle based on a sampling of the analogue continuous field. In this article we demonstrate a novel validity condition for the well-sampling in RSD, which makes a systematic treatment of sampling in RSD possible. We show the fundamental restrictions due to this condition and the anomalies caused by its violation. We also demonstrate that the restrictions are completely removed by a sampling below the Abbe resolution limit. Furthermore, we present a very general unified approach for applying the RSD outside its validity domain by the combination of a forward and reverse calculation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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