Ultra-wide-angle holographic near-eye display with spherical illumination

IF 3.7 2区工程技术 Q2 OPTICS

Optics and Lasers in Engineering Pub Date : 2025-08-22 DOI:10.1016/j.optlaseng.2025.109280

Tomasz Kozacki, Moncy Sajeev Idicula, Maksymilian Chlipala, Dawid Ciesielski, Artur Szawerdak, Juan Martinez-Carranza

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Abstract

This work develops an accurate and efficient computer generation hologram (CGH) method that supports a wide-angle field of view (FoV) or ultra-wide-angle FoV using spherical illumination. The method calculates the CGH in the frequency domain, which means that 3D object geometry information is updated in the frequency domain only for the frequency range of an object point sub-hologram. The bandwidths of these sub-holograms are shown to be narrow, providing CGH with efficient computation. Derived equations show that CGH with spherical illumination generates an image with highly inhomogeneous and highly anisotropic resolution, which depends on the size of the sub-hologram that is a function of illumination sphericity and the field coordinate. Two versions of the CGH algorithm are developed: one allowing a maximum doubling the native FoV and the second allowing a larger expansion of FoV. Finally, the spherical illumination method is shown to improve the performance of a color display. It is shown that it equalizes the FoVs of RGB holograms. The work is illustrated with experiments and simulations; the experiment shows the increase of FoV from 14.7° × 31.5° to 65.7° × 51.2°, and the simulation from 29° × 29° to 60° × 97.2°

查看原文本刊更多论文

球面照明的超广角全息近眼显示器

本工作开发了一种精确高效的计算机生成全息图（CGH）方法，该方法支持使用球面照明的广角视场（FoV）或超广角FoV。该方法在频域计算CGH，即只在目标点子全息图的频率范围内更新三维物体的几何信息。这些子全息图的带宽很窄，为CGH提供了高效的计算。推导出的方程表明，球面照明下的CGH图像具有高度非均匀性和高度各向异性的分辨率，这取决于子全息图的大小，而子全息图的大小是照明球度和场坐标的函数。开发了两种版本的CGH算法：一种允许最大限度地将原始FoV加倍，另一种允许更大的FoV扩展。最后，说明了球面照明方法可以提高彩色显示器的显示性能。结果表明，该方法能使RGB全息图的视场均匀。通过实验和仿真说明了本文的工作；实验结果表明，视场由14.7°× 31.5°增加到65.7°× 51.2°，仿真结果由29°× 29°增加到60°× 97.2°

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来源期刊

Optics and Lasers in Engineering 工程技术-光学

CiteScore

8.90

自引率

8.70%

发文量

384

审稿时长

42 days

期刊介绍： Optics and Lasers in Engineering aims at providing an international forum for the interchange of information on the development of optical techniques and laser technology in engineering. Emphasis is placed on contributions targeted at the practical use of methods and devices, the development and enhancement of solutions and new theoretical concepts for experimental methods. Optics and Lasers in Engineering reflects the main areas in which optical methods are being used and developed for an engineering environment. Manuscripts should offer clear evidence of novelty and significance. Papers focusing on parameter optimization or computational issues are not suitable. Similarly, papers focussed on an application rather than the optical method fall outside the journal''s scope. The scope of the journal is defined to include the following: -Optical Metrology- Optical Methods for 3D visualization and virtual engineering- Optical Techniques for Microsystems- Imaging, Microscopy and Adaptive Optics- Computational Imaging- Laser methods in manufacturing- Integrated optical and photonic sensors- Optics and Photonics in Life Science- Hyperspectral and spectroscopic methods- Infrared and Terahertz techniques