A hybrid head mounted display with small total track length and large field of view

Andreas Georgiou; Jacob Hadnett-Hunter; Charlie Hewitt; Mario Possiwan; Brian Guenter; Maria Pace; Ishan Chatterjee; Joel Kollin; Bernard Kress

doi:10.1117/12.2679099

7 August 2023 A hybrid head mounted display with small total track length and large field of view

Andreas Georgiou, Jacob Hadnett-Hunter, Charlie Hewitt, Mario Possiwan, Brian Guenter, Maria Pace, Ishan Chatterjee, Joel Kollin, Bernard Kress

Author Affiliations +

Proceedings Volume 12624, Digital Optical Technologies 2023; 1262406 (2023) https://doi.org/10.1117/12.2679099
Event: SPIE Digital Optical Technologies, 2023, Munich, Germany

Abstract

Two technologies were combined to demonstrate a compact, foveated occlusive Mixed Reality (MR) headset. Waveguide displays were used to create the central, high-resolution Field of View (FOV), and a Heterogeneous Multi-Lens Array (HMLA) based display formed the periphery. A HoloLens 2, employing transparent waveguide displays, was the foveated display, covering a horizontal FOV of 43◦ with a resolution of 47 Pixels Per Degree (ppd). Each peripheral display used a custom-made HMLA and an off-the-shelf OLED microdisplay, with each lens of the HMLA array acting as a small VR display. Collectively, the array lenses tiled both the eye box and FOV to create a non-rectangular FOV of 26◦ × 26◦ and a large eye box with a resolution of 5 pixels per degree (ppd). Since the waveguide headset has see-through optics, the two peripheral displays were attached in front of its visor, so the two images were merged. The peripheral display had a one-degree overlap with the foveated display, making the total FOV of the hybrid headset 93◦. The system’s optics were less than 5mm thick, though the experimental setup was thicker due to optomechanical and industrial design constraints. The software of the peripheral display was integrated with the central display, making it a cohesive experience. The latency between the (faster) Central and the (slower) peripheral displays were compensated by using predictive algorithms for the head movement. A qualitative user study at the end of the project verified that the experience was improved and showed that the neck strain was significantly reduced and comfort increased.

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Citation Download Citation

Andreas Georgiou, Jacob Hadnett-Hunter, Charlie Hewitt, Mario Possiwan, Brian Guenter, Maria Pace, Ishan Chatterjee, Joel Kollin, and Bernard Kress "A hybrid head mounted display with small total track length and large field of view", Proc. SPIE 12624, Digital Optical Technologies 2023, 1262406 (7 August 2023); https://doi.org/10.1117/12.2679099

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