Single frame near-eye holographic display with RGB image and on-axis illumination

Holographic near-eye displays (HNEDs) enable realistic 3D reconstruction with full physiological cues without vergence-accommodation conflict common in other near-eye designs. To make HNEDs more feasible, it is necessary to have large field of view (FoV) and full color reconstruction. While a large FoV can be achieved with both pupil and non-pupil based HNED configurations, realizing full-color holographic reconstruction remains a significant challenge. Full-color HNEDs can be achieved by techniques like temporal multiplexing, frequency division or complex spatial filters; however, these approaches increase the system's complexity and do not report a large FoV. A promising solution appears in a recent work [Chlipala M., et al. Scientific Reports, 2025, 15.1:15221], which proposes wide-angle non-pupil setup capable of reconstructing large 3D full-color scenes from single frames using RGB LED illumination. However, this approach requires precise adjustment of the RGB illumination angles, which is challenging in practical conditions. HNED is a wearable display where design simplicity is central. Therefore, this paper investigates a simplified single-shot color HNED configuration in which all RGB illumination beams propagate along the z-axis. The system is designed in a pupil configuration and is analyzed in terms of resulting FoV and image quality. Simulation and experimental results verify the proposed design solution.