Papers & References

Dynamic eyebox expansion in holographic near-eye displays via active switching quarter-waveplate geometric phase prisms

PLUTO / PLUTO-2 Spatial Light Modulators
AR/VR/MR / Holographic Display Deep Learning / Neuronal Network Digital-/ Computer Holography/ CGH
Published on:
Authors: Erkhembaatar Dashdavaa, Erdenebayar Bayarsaikhan, Munkh-Uchral Erdenebat, Jae-Yeol Cha, Jae-Won Lee, Jin-Hyeok Seo, Hyeon-Su Jeong, Min-Seok Kim, Ji-Sub Park, and Hak-Rin Kim
Abstract:

This study presents a dynamic eyebox expansion method in holographic near-eye displays (H-NEDs) using bi-stacked, actively switchable geometric phase prisms (GPPs) with quarter-waveplate (QWP) retardation. Orthogonally oriented QWP-GPPs independently steer beams in two dimensions, forming nine discrete exit pupils in a 3×3 array. Temporal polarization multiplexing activates a single pupil at a time, ensuring high efficiency and effectively suppressing inter-pupil crosstalk. Integrated with gaze tracking, the system dynamically aligns the active viewpoint with the user’s gaze, improving alignment tolerance and visual comfort. Experiments validate 12mm × 12mm eyebox expansion and ~13.4° diagonal field-of-view (FOV) per viewpoint, proving compact, user-adaptive H-NED feasibility.

Open Access

Publication: Photonics Research
Issue/Year: Photon. Res. 14, 1461-1479 (2026)
DOI: 10.1364/PRJ.580068
Link: https://doi.org/10.1364/PRJ.580068
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