Re-sampling of inline holographic images for improved reconstruction resolution

Details Re-sampling of inline holographic images for improved reconstruction resolution Re-sampling of inline holographic images for improved reconstruction resolution

2009-11-03

arxiv.org/abs/0911.0520v1

Physics

Optics

10 pages, 3 figures

Scientific paper

Digital holographic microscopy based on Gabor in-line holography is a well-known method to reconstruct both the amplitude and phase of small objects. To reconstruct the image of an object from its hologram, obtained under illumination by monochromatic scalar waves, numerical calculations of Fresnel integrals are required. To improve spatial resolution in the resulting reconstruction, we re-sample the holographic data before application of the reconstruction algorithm. This procedure amounts to inverting an interpolated Fresnel diffraction image to recover the object. The advantage of this method is demonstrated on experimental data, for the case of visible-light Gabor holography of a resolution grid and a gnat wing.

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