Optical See-through Head-mounted Displays with Wide Field of View and Hard-edge Occlusion by Using Paired Conical Reflectors
Posted on 2021-08-23 - 13:59
Optical see-through head-mounted displays (OST-HMDs) 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 (AR). However, existing mutual occlusion methods fail to work well with a large field of view (FOV). In this paper, we propose a double-parabolic-mirror (DPM) 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 (LCoS) device is introduced as the spatial light modulator (SLM) for imaging a bright see-through view and rendering sharp occlusion patterns. A loop structure is built for eliminating vertical parallax. The system is designed to obtain a maximum monocular FOV of H114° X V95° with hard-edge occlusion and an FOV of H83.5° X V53.1° is demonstrated with our bench-top prototype.
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Zhang, Yan; Hu, Xiaodan; Kiyokawa, Kiyoshi; Isoyama, Naoya; Sakata, Nobuchika; Hua, Hong (2021). Optical See-through Head-mounted Displays with Wide Field of View and Hard-edge Occlusion by Using Paired Conical Reflectors. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.5405085.v1
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AUTHORS (6)
YZ
Yan Zhang
XH
Xiaodan Hu
KK
Kiyoshi Kiyokawa
NI
Naoya Isoyama
NS
Nobuchika Sakata
HH
Hong Hua