High-resolution optical see-through multi-focal-plane head-mounted display using freeform optics

Abstract

Conventional stereoscopic displays force an unnatural decoupling of the accommodation and convergence cues, which may contribute to various visual artifacts and have adverse effects on depth perception accuracy. In this paper, we present the design and implementation of a high-resolution optical see-through multi-focal-plane head-mounted display enabled by state-of-the-art freeform optics. The prototype system is capable of rendering nearly-correct focus cues for a large volume of 3D space, extending into a depth range from 0 to 3 diopters. The freeform optics, consisting of a freeform prism eyepiece and a freeform lens, demonstrates an angular resolution of 1.8 arcminutes across a 40-degree diagonal field of view in the virtual display path while providing a 0.5 arcminutes angular resolution to the see-through view.

A study on differences in human perception between a real and an AR scene viewed in an OST‐HMD

“…Since most of the HMDs have a fixed focal length, a focal rivalry will arise when the depth of the virtual objects is different from the focal length, which will influence users' perception in AR. Indeed, some researchers have come up with ideas to deal with the problem, such as using free‐form design . However, there is still a need for measuring methods for perception issues in AR.…”

Design of a Low Distortion Head-Mounted Display with Freeform Reflective Mirror Based on Two Ellipsoids Structure

“…The combiner is used to provide the combination of computer-generated scenes and real-world scenes. The relay lens group is used to correct off-axis aberrations introduced by the tilted combiner [3]. There are two basic design concepts for the combiner: one is flat, often providing an on-axis system; the other has an optical power, often providing an off-axis system.…”

Design of a See-Through Head-Mounted Display with a Freeform Surface

“…Nowadays HMDs have undergone continuous and rapid development, due to the rapid advance of these interdisciplinary technologies, and thus have been widely used in many applications, such as virtual reality, augmented reality, training, medical visualization, and entertainment industries [2][3][4][5]. Figure 1 is the structure of a see-through HMD system.…”