Experiment demonstrates 2x optical efficiency and improved eyebox uniformity using polarization volume gratings.
To circumvent the low efficiency of waveguide‐based AR displays, we discovered a novel polarization conversion effect in polarization volume gratings. Leveraging from this effect, we break the theoretical in‐coupling efficiency limit of conventional couplers. In the experiment, we achieved a 2x higher optical efficiency and 2.3x better eyebox uniformity.
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Ding et al. (2025) studied this question.
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