HoloTile: Rapid and speckle-suppressed digital holography by matched sub-hologram tiling and point spread function shaping

GAEA / GAEA-2 Spatial Light Modulators
Beam Shaping / Beam Steering Digital-/ Computer Holography/ CGH
Published on:
Authors: Madsen, Andreas Gejl / Glückstad, Jesper
Abstract:

In this work, a novel approach to rapid and speckle-reduced hologram generation is presented as HoloTile. HoloTile utilizes an analytic approach for Gaussian beam shaping to modify the Point Spread Function (PSF) of the holographic system into flat-top squares, such as to prevent interference between adjacent random phase values in the reconstruction plane. The PSF shape is determined by the inter-spectral spacing in the reconstruction plane that occurs due to tiling on the spatial light modulator. As such, the final hologram is the product of a once-calculated PSF shaping phase hologram and the tiled object holograms. HoloTile achieves speckle-reduced reconstructions and extremely fast hologram generation, due to the resolution of the object holograms.

Open Access

Publication: Optics Communications
Issue/Year: Optics Communications, Volume 525, 15 December 2022, 128876
DOI: 10.1016/j.optcom.2022.128876
Link: https://doi.org/10.1016/j.optcom.2022.128876

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