Varifocal occlusion in an optical see-through near-eye display with a single phase-only liquid crystal on silicon

Woongseob Han, Jae Won Lee, Jung Yeop Shin, Myeong Ho Choi, Hak Rin Kim, Jae Hyeung Park

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We propose a near-eye display optics system that supports three-dimensional mutual occlusion. By exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS), we achieve real see-through scene masking as well as virtual digital scene imaging using a single LCoS. Dynamic depth control of the real scene mask and virtual digital image is also achieved by using a focus tunable lens (FTL) pair of opposite curvatures. The proposed configuration using a single LCoS and opposite curvature FTL pair enables the self-alignment of the mask and image at an arbitrary depth without distorting the see-through view of the real scene. We verified the feasibility of the proposed optics using two optical benchtop setups: one with two off-the-shelf FTLs for continuous depth control, and the other with a single Pancharatnam-Berry phase-type FTL for the improved form factor.

Original languageEnglish
Pages (from-to)833-853
Number of pages21
JournalPhotonics Research
Volume12
Issue number4
DOIs
StatePublished - 1 Apr 2024

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