Recent progress in Pancharatnam–Berry phase optical elements and the applications for virtual/augmented realities

By Yun-han Lee, Guanjun Tan, Tao Zhan, Yishi Weng, Guigeng Liu, F. Gou, F. Peng, N. Tabiryan, S. Gauza, Shin‐Tson Wu. 2017

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Abstract In this review paper,we report recent progress on Pancharatnam-Berry (PB) phase optical elements, such as lens, grating, and deflector. PB lenses exhibit a fast switching time between two or more focal lengths with large diopter change and aperture size, which is particularly attractive for addressing the accommodation mismatch in head-mounted display devices. On the other hand, PB gratings and deflectors offer a large-angle beam deflection with wide acceptance cone and high efficiency, as compared to conventional volume gratings. Such merits provide great advantages for waveguide-coupling augmented reality headsets. Moreover, the thickness of PB optical elements is only a few micrometers, thus they can be conveniently integrated into modern wearable display systems.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Media Technology

View Paper: https://www.semanticscholar.org/paper/90643c09158ee1c29d8ee10e86dc1bb4f83e0a14