无目镜设计优化视区，提升全息近眼显示清晰度与深度感知。
Eyepiece-free pupil-optimized holographic near-eye displays
- 用球面相位调制生成多视角，无需传统目镜。
- 联合优化振幅与相位，显著减少有限视区导致的图像失真。
- 适合追求轻量化、高沉浸感的下一代虚拟/增强现实设备研发。
计算机生成全息技术（CGH）为下一代沉浸式虚拟现实（VR）与增强现实（AR）显示提供了变革性方案，可精确调控波前并自然呈现完整的生理深度线索，且无需笨重的光学组件。尽管计算算法在提升图像质量与实现实时生成方面取得显著进展，实际全息近眼显示（NED）系统仍面临有限且动态变化的视区孔径带来的严重挑战，导致图像质量下降并影响用户体验。本文提出一种无目镜的视区优化全息近眼显示方案。该方法采用定制化球面相位调制策略，在视区内生成多个视角，完全摆脱对传统光学目镜的依赖。通过联合优化各视角的振幅与相位分布，有效缓解因有限视区采样引起的图像退化，并解决由球面相位引发的不明显深度线索问题。该方法为实现紧凑、轻便、灵活的全息近眼显示系统奠定了重要基础，满足未来VR/AR显示技术的严苛需求。
原文摘要 · Abstract (English)
Computer-generated holography (CGH) represents a transformative visualization approach for next-generation immersive virtual and augmented reality (VR/AR) displays, enabling precise wavefront modulation and naturally providing comprehensive physiological depth cues without the need for bulky optical assemblies. Despite significant advancements in computational algorithms enhancing image quality and achieving real-time generation, practical implementations of holographic near-eye displays (NEDs) continue to face substantial challenges arising from finite and dynamically varying pupil apertures, which degrade image quality and compromise user experience. In this study, we introduce an eyepiece-free pupil-optimized holographic NED. Our proposed method employs a customized spherical phase modulation strategy to generate multiple viewpoints within the pupil, entirely eliminating the dependence on conventional optical eyepieces. Through the joint optimization of amplitude and phase distributions across these viewpoints, the method markedly mitigates image degradation due to finite pupil sampling and resolves inapparent depth cues induced by the spherical phase. The demonstrated method signifies a substantial advancement toward the realization of compact, lightweight, and flexible holographic NED systems, fulfilling stringent requirements for future VR/AR display technologies.
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