I wanted to replicate many parts of the Ai pin and did research into laser projectors. It’s probably a MEMs projector. The cyan color they use is custom, at least. Minifying that tech and making it robust enough to be knocked around on a wearable device is pretty challenging and I couldn’t find anything of a similar size off the shelf. They also run pretty hot and apparently the pin has heat issues (and according to folks at CES (?) using the laser a lot makes it over heat.
Perhaps it's my jaded view seasoned by the observation of decades of tech bullshit, but that could go one of two ways:
1. The laser tech is full of trade secrets that we dare not reveal just yet.
2. We don't want anyone to find out that we bought these laser things off AliExpress.
(Or maybe it's tech you could buy off Amazon ten years ago, who knows? https://www.amazon.com/Brookstone-FBA_mp-796246-Projection-V...)