Journal
OPTICS EXPRESS
Volume 29, Issue 6, Pages 8258-8267Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.417112
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Funding
- Innovation and Technology Commission [PRP/049/19FX]
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The article introduces a switchable lens device combining a fast FLC-based polarization rotation unit and a passive LC lens, allowing rapid access to multiple focal points, making it a convenient device for VR applications.
Optical devices like virtual reality (VR) headsets present challenges in terms of vergence-accommodation conflict that leads to visual fatigue for the user over time. Lenses available to meet these challenges include liquid crystal (LC) lenses, which possess a response time in the millisecond range. This response time is slow, while accessing multiple focal lengths. A ferroelectric liquid crystal (FLC) has a response time in the microsecond range. In this article, we disclose a switchable lens device having a combination of the fast FLC-based polarization rotation unit and a passive polarization-dependent LC lens. A cascaded combination of three such lens units allows access to eight different focal points quite rapidly and can be a convenient device for VR applications. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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