It appears to be related to fiber optics, here’s the best resource I found:
Comment on There’s No Dancing Around It: Apple’s Vision Pro Was An Ugly Dud
cornshark@lemmy.world 2 weeks agoWhat’s a waveguide?
vulture_god@lemmy.dbzer0.com 2 weeks ago
Mbourgon@lemmy.world 2 weeks ago
Here’s a good article about this specific waveguide: theverge.com/…/stanford-ai-holographic-ar-glasses…
TLDR - they need special materials to allow small/thin glasses for XR goggles. This looks like it could be huge.