Fast 3D Content Update for Wide-Angle Holographic Near-Eye Display

GAEA / GAEA-2 Spatial Light Modulators
AR/VR/MR / Holographic Display Digital-/ Computer Holography/ CGH
Published on:
Authors: Rafał Kukołowicz; Chlipala, Maksymilian; Martinez-Carranza, Juan; Idicula, Moncy Sajeev & Kozacki, Tomasz
Abstract:
“Near-eye holographic displays are the holy grail of wear-on 3D display devices because they are intended to project realistic wide-angle virtual scenes with parameters matching human vision. One of the key features of a realistic perspective is the ability to move freely around the virtual scene. This can be achieved by addressing the display with wide-angle computer-generated holograms (CGHs) that enable continuous viewpoint change. However, to the best of our knowledge there is no technique able to generate these types of content. Thus, in this work we propose an accurate and non-paraxial hologram update method for wide-angle CGHs that supports continuous viewpoint change around the scene. This method is based on the assumption that with a small change in perspective, two consecutive holograms share overlapping data. This enables reusing the corresponding part of the information from the previous view, eliminating the need to generate an entirely new hologram. Holographic information for the next viewpoint is calculated in two steps: first, a tool approximating the Angular Spectrum Propagation is proposed to generate the hologram data from previous viewpoint; and second, the efficient Phase Added Stereogram algorithm is utilized for generating the missing hologram content. This methodology offers fast and accurate calculations at the same time. Numerical and optical experiments are carried out to support the results of the proposed method.”

Open Access

Publication: Applied Sciences
Issue/Year: Applied Sciences, Volume 12; Number 1; Pages 293; 2021
DOI: 10.3390/app12010293
Link: https://doi.org/10.3390/app12010293

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