31‐3: Continuous High‐Efficiency Beam Deflector for AR/VR Devices. Issue 1 (28th June 2021)

• Record Type: Journal Article
• Authors: Yousefzadeh, Comrun; Van Rynbach, Andre; Bryant, Doug; Bos, Philip
• Is Part Of: Digest of technical papers. Volume 52:Issue 1(2021)
• Page Start: 402
• Page End: 405
• Publication Date: 2021-06-28
• Subjects: Liquid-crystal beam steering -- AR/VR devices -- Maxwellian view systems -- Pancharatnam-Berry's phase -- Beam steering device -- Fringe Field Switching -- Opto-Electronic device; Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.14701
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract : The use of Augmented/Virtual Reality (AR/VR) and near‐eye displays (NED) can cause eye fatigue due to the mismatch of the accommodation and convergence (AC) distances. Maxwellian view displays (retina‐projection display) have the potential to bypass AC mismatch by projecting the image directly onto the retina. In this approach, the final image always stays in focus at the retina by converging the rays at the eye pupil, therefore, making tthe focus depth independent. However, the narrow eyebox size can hinder the employment of this approach. Therefore, there is a need for a beam steering device with high‐efficiency, continuous steering capabilities that, in combination with an eye‐tracking system, could expand the application of AR/VR systems. In this paper, we represent a novel approach to a fully tunable beam steering device based on the Pancharatnam‐Berry phase in a liquid crystal. This device maintains a high efficiency that, along with an eye‐tracking system, can potentially address the limitations in Maxwellian view systems.