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- W4386229791 abstract "Improvements to the spatial resolution and field-of-view of observed images are actively investigated in optical microscopy. However, accomplishing both simultaneously is challenging because of a tradeoff relationship between them. Digital holography numerically restores three-dimensional image information using optically captured diffracted waves. We propose that high-resolution images could be acquired over a wide field view irrespective of the complexity of holographic imaging systems. The crucial idea is that the numerical aperture (NA) of digital hologram can be extended in terms of the expansion process of angular spectrum by arranging replicas in the reciprocal space. Only a low-NA hologram captured over a wide field restores high-resolution images when using an optimization algorithm including spectrum expansion process. This phenomenon results from the fact that the replication patterns of optical kernel functions in both real and Fourier spaces correlate to higher angular spectra. Numerical simulations and optical experiments are performed to verify our scheme." @default.
- W4386229791 created "2023-08-29" @default.
- W4386229791 creator A5007185999 @default.
- W4386229791 date "2023-08-24" @default.
- W4386229791 modified "2023-09-27" @default.
- W4386229791 title "Spatial resolution enhancement in holographic imaging via angular spectrum expansion" @default.
- W4386229791 doi "https://doi.org/10.48550/arxiv.2308.13115" @default.
- W4386229791 hasPublicationYear "2023" @default.
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