Geometrical-lightguide-based head-mounted lightfield displays using polymer-dispersed liquid-crystal films

Optics Express
Miaomiao Xu, Hong Hua

Abstract

Integrating the promising waveguide or lightguide optical combiners to head-mounted lightfield display (LF-HMD) systems offers a great opportunity to achieve both a compact optical see-through capability required for augmented or mixed reality applications and true 3D scene with correct focus cues required for mitigating the well-known vergence-accommodation conflict. Due to the non-sequential ray propagation nature of these flat combiners and the ray construction nature of a lightfield display engine, however, adapting these two technologies to each other confronts several significant challenges. In this paper, we explore the feasibility of combining an integral-imaging-based lightfield display engine with a geometrical lightguide based on microstructure mirror arrays. The image artifacts and the key challenges in a lightguide-based LF-HMD system are systematically analyzed and are further quantified via a non-sequential ray tracing simulation. We further propose to utilize polymer-dispersed liquid-crystal (PDLC) films to address the inherent problems associated with a lightguide combiner such as increasing the viewing density and improving the image coupling uniformity. We finally demonstrate, to our best knowledge, the first...Continue Reading

References

Feb 8, 2008·Nature·Savaş TayN Peyghambarian
Mar 20, 2008·Applied Optics·J P RollandA Goon
Jun 13, 2014·Optics Express·Hong Hua, Bahram Javidi
Oct 19, 2017·Optics Express·Hekun Huang, Hong Hua
Jan 11, 2018·Nature Communications·Dakota E McCoyRichard O Prum
Feb 15, 2018·Optics Letters·Seong-Bok Kim, Jae-Hyeung Park

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