How does Hololens2 display work?

In this video, I will cover display technology behind Microsoft's Augmented Reality (AR) headset, Hololens2.

[@paytongrenich6674]

Hi Jun, great video, subscribed! I'm interested in learning more and I'm curious to know where you got the information you're presenting here?

[@himanshikataria1231]

Hey Jun,Can we get more videos on the internal working of HoloLens 2 ?

[@CutePaw9]

Nice info but what about the focal distance, how they are maintaining it in such a compact design....

[@MikeTrieu]

Laser Beam Steering (LBS) doesn't require focusing optics because the beams are already collimated. The image is raster scanned with the MEMS bi-axial mirror. This is a very different compared to other MEMS approaches like TI's Digital Micromirror Device (DMD) which just switch the mirrors like static pixels in sync with a color wheel. DMDs can also use laser illumination, but in that case they're not really interested in the lasers' collimated radiation pattern, but mostly in the spectral purity of the light produced.

[@srinadhbijjala8772]

Isn't it harmful to focus laser directly into eyes?