Hologram computation using the radial point spread function

GAEA / GAEA-2 Spatial Light Modulators
AR/VR/MR / Holographic Display Digital-/ Computer Holography/ CGH
Published on:
Authors: Yasuki, Daiki; Shimobaba, Tomoyoshi; Makowski, Michal; Suszek, Jaroslaw; Kakue, Takashi & Ito, Tomoyoshi
Abstract:
“Holograms are computed by superimposing point spread functions (PSFs), which represent the distribution of light on the hologram plane. The computational cost and the spatial bandwidth product required to generate holograms are significant; therefore, it is challenging to compute high-resolution holograms at the rates required for videos. Among the possible displays, fixed-eye-position holographic displays, such as holographic head-mounted displays, reduce the spatial bandwidth product by fixing eye positions while satisfying almost all human depth cues. In eye-fixed holograms, by calculating a part distribution of the entire PSF, we observe reconstructed images that maintain the image quality and the depth of focus almost as high as those generated by the entire PSF. In this study, we accelerate the calculation of eye-fixed holograms by engineering the PSFs. We propose cross and radial PSFs, and we determine that, out of the two, the radial PSFs have a better image quality. By combining the look-up table method and the wavefront-recording plane method with radial PSFs, we show that the proposed method can rapidly compute holograms.”

Restricted Access

Publication: Applied Optics
Issue/Year: Applied Optics, Volume 60; Number 28; Pages 8829; 2021
DOI: 10.1364/ao.437777
Link: https://doi.org/10.1364/ao.437777

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