https://www.makeuseof.com/best-google-poly-alternatives/
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more on Google POly in this IMS blog
https://blog.stcloudstate.edu/ims?s=%22google+poly%22
Toward Lighter, Thinner AR/VR Systems
https://www.osa-opn.org/home/articles/volume_32/july_august_2021/features/toward_lighter_thinner_ar_vr_systems/
liquid-crystal polarization holograms (LCPHs)—versatile, cost-effective elements that we believe marry the best that liquid-crystal (LC) photonics and holography have to offer.
a new class of near-eye displays that combines holographic optics and polarization-based optical folding—an approach that could be used to develop future VR sunglasses.
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more on immersive in this IMS blog
https://blog.stcloudstate.edu/ims?s=immersive