Current AR waveguide fabrication processes, including Surface Relief Gratings (SRG), holographic and cascaded mirrors, are reviewed. We present DigiLens’s Switchable Bragg Grating (SBG) based process, a manufacturing method based on classical holographic contact copy, which today is used for both large and small AR displays including a range of displays suitable for HUD and XR applications.

© 2018 The Author(s)

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