Abstract
Holographic display is the only technology that can offer true 3D with all the required depth cues. Holographic head-worn displays (HWD) can provide continuous depth planes with the correct stereoscopic disparity for a comfortable 3D experience. Existing HWD approaches have small field-of-view (FOV) and small exit pupil size, which are limited by the spatial light modulator (SLM). Conventional holographic HWDs are limited to about 20° × 11° FOV using a 4 K SLM panel and have fixed FOV. We present a new optical architecture that can overcome those limitations and substantially extend the FOV supported by the SLM. Our architecture, which does not contain any moving parts, automatically follows the gaze of the viewer’s pupil. Moreover, it mimics human vision by providing varying resolution across the FOV resulting in better utilization of the available space-bandwidth product of the SLM. We propose a system that can provide 28° × 28° instantaneous FOV within an extended FOV (the field of view that is covered by steering the instantaneous FOV in space) of 60° × 40° using a 4 K SLM, effectively providing a total enhancement of > 3 × in instantaneous FOV area, > 10 × in extended FOV area and the space-bandwidth product. We demonstrated 20° × 20° instantaneous FOV and 40° × 20° extended FOV in the experiments.
Highlights
Holographic display is the only technology that can offer true 3D with all the required depth cues
Holographic head-worn displays (HWD), on the other hand, show computer generated holograms (CGHs) with the correct perspective and all the natural depth cues to each eye by emulating the wavefront pattern that would be emitted from the displayed 3D o bjects[6,7]
We propose a novel optical architecture for holographic HWD where the spatial light modulator (SLM) is imaged at the rotation center of the eye
Summary
Holographic display is the only technology that can offer true 3D with all the required depth cues. Since it is not currently possible to rival the FOV of human vision using holographic displays, one solution is to implement a foveated display where only the CGH for the gazed object is being generated and the peripheral image is displayed with a low-resolution m icrodisplay[14].
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have