[ickwabe]

I think it's in there in the "waveguide" tech. iFixit has a pretty good write on on their tear down and they mention this.

https://www.ifixit.com/Teardown/Magic+Leap+One+Teardown/1122...

Also...

https://techcrunch.com/2018/08/23/teardown-of-magic-leap-one...