Chirped polarization volume grating for wide FOV and high‐efficiency waveguide‐based AR displays,Journal of the Society for Information Display

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Chirped polarization volume grating for wide FOV and high‐efficiency waveguide‐based AR displays
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2020-04-03 , DOI: 10.1002/jsid.893
Kun Yin ₁ , Hung‐Yuan Lin ₁ , Shin‐Tson Wu ₁

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We demonstrate a reflective chirped polarization volume grating as a strong contender for wide field‐of‐view augmented reality display systems. By introducing gradient pitch along the beam propagation direction, the angular bandwidth extends dramatically from 18° to 54° while keeping over 80% average efficiency and 95% peak efficiency.

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