Losing the information contained in evanescent waves scattered from an object limits the best achievable resolution in far-field optical imaging systems to about half of the wavelength. This limitation is known as the diffraction limit. In this paper, we propose a new holography-based far-field imaging technique to go beyond the diffraction limit and achieve super-resolution images. In the proposed method, after the recording process, multiple reconstruction processes with appropriate reconstruction waves are performed to extract information about sub-wavelength features of a target object encoded in the evanescent waves scattered from it. It is analytically proved that in the proposed method, by increasing the number of reconstruction steps, the resolution increases. The performance of the method is numerically validated. In numerical analysis, by performing two reconstruction steps, a resolution of 1/14 of the working wavelength is achieved. This resolution can be further improved by increasing the number of reconstruction steps.

中文翻译：

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使用多重全息技术的超分辨率远场亚波长成像

丢失从物体散射的e逝波中包含的信息会将远场光学成像系统中最佳可实现的分辨率限制为大约一半的波长。该限制称为衍射极限。在本文中，我们提出了一种新的基于全息的远场成像技术，以超越衍射极限并获得超分辨率图像。在所提出的方法中，在记录过程之后，执行具有适当的重构波的多个重构过程，以提取关于编码在从其散射的waves逝波中的目标物体的子波长特征的信息。分析证明，在所提出的方法中，通过增加重建步骤的数目，分辨率提高了。该方法的性能在数值上得到了验证。在数值分析中 通过执行两个重建步骤，可以实现工作波长的1/14的分辨率。通过增加重建步骤的数量，可以进一步提高分辨率。