Augmented reality headsets are too large for mainstream users, commonly sporting design elements that look inspired by Star Trek and Star Wars props. That’s about to change: After , patent documents submitted by  and  show that both companies are trying to make AR glasses smaller and better.

Facebook’s just-patented invention uses a new technique to fit a large-looking display inside a small headset. The invention creates a waveguide display using two parallel surfaces, potentially combining the

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