HoloKit is like Google Cardboard for augmented reality

The revelation behind Google Cardboard was that if you put your phone close enough to your eyes, it’s basically a VR headset — but it’s not quite that simple for mixed reality setups like Microsoft’s HoloLens. Or is it? HoloKit is an extremely clever DIY solution for a quick and dirty augmented reality experience with a bare minimum of equipment.

The idea is really quite simple: Instead of a costly projection system, a pair of mirrors reflects the display of a smartphone onto an angled, semi-transparent Fresnel lens — so you see both the image and the world behind it. Meanwhile, the phone is in position to use its camera and sensors to track the world in front of you.

It really is clever, and reminiscent of half-mirrored-glass optical tricks going back decades. It’s not…

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