Optical see-through augmented reality displays with wide field of view and hard-edge occlusion by using paired conical reflectors
2021; Optica Publishing Group; Volume: 46; Issue: 17 Linguagem: Inglês
10.1364/ol.428714
ISSN1539-4794
AutoresYan Zhang, Xiaodan Hu, Kiyoshi Kiyokawa, Naoya Isoyama, Nobuchika Sakata, Hong Hua,
Tópico(s)Interactive and Immersive Displays
ResumoOptical see-through head-mounted displays are actively developed in recent years. An appropriate method for mutual occlusion is essential to provide a decent user experience in many application scenarios of augmented reality. However, existing mutual occlusion methods fail to work well with a large field of view (FOV). In this Letter, we propose a double-parabolic-mirror structure that renders hard-edge occlusion within a wide FOV. The parabolic mirror increases the numerical aperture of the system significantly, and the usage of paired parabolic mirrors eliminates most optical aberrations. A liquid crystal on silicon device is introduced as the spatial light modulator for imaging a bright see-through view and rendering sharp occlusion patterns. A loop structure is built to eliminate vertical parallax. The system is designed to obtain a maximum monocular FOV of H 114 ∘ × V 95 ∘ with hard-edge occlusion, and a FOV of H 83.5 ∘ × V 53.1 ∘ is demonstrated with our bench-top prototype.
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