Abstract
In order to overcome the accommodation and convergence (A-C) conflict that commonly causes visual fatigue in AR display, we propose a Maxwellian-viewing-super-multi-view (MV-SMV) near-eye display system based on a Pancharatnam-Berry optical element (PBOE). The PBOE, which is constituted with an array of high-efficiency polarization gratings, is implemented to direct different views to different directions simultaneously, constructing the 3D light field. Meanwhile, each view is like a Maxwellian view display that possesses a small viewpoint and a large depth of field (DOF). Hence, the MV-SMV display can display virtual images with correct accommodation depth cue within a large DOF. We implement a proof-of concept MV-SMV display prototype with 3 × 1 and 3 × 2 viewpoints using a 1D PBOE and a 2D PBOE, respectively, and achieve a DOF of 4.37 diopters experimentally.
Highlights
Augmented reality (AR) [1,2,3], which augments the virtual information on the real-world environment, is an emerging technology that has potential applications in various fields such as healthcare, education and military
We propose a Maxwellian-viewing-supermulti-view (MV-super-multi view (SMV)) near-eye display system based on a Pancharatnam-Berry optical element (PBOE) [27], to achieve both correct accommodation depth cue and a large depth of field (DOF)
In the proposed MV-SMV system, for each view, the parallax image is produced from the collimated light source, so that it could be considered as a Maxwellian-viewing display
Summary
Augmented reality (AR) [1,2,3], which augments the virtual information on the real-world environment, is an emerging technology that has potential applications in various fields such as healthcare, education and military. In a SMV near-eye display, more than one parallax images are observed by a single eye, and the light field of the multiple views can evoke correct focus adaption of the eye. This method usually suffers from a limited depth of field (DOF) [26]. The system employs a holographic optical element (HOE) [28] which functions as an optical combiner and an eyepiece In this MV-SMV display, the light of each view is produced from collimated laser light, and each view behaves like a Maxwellian-viewing display, providing always-in-focus images and a small eye box (or viewpoint). Experimental result confirms that correct accommodation depth cue could be obtained within a large range from 20 cm to 160 cm
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