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Can you use this for 3d printin? Like in an array of lasers where every laser is a pixel and you get 3d by shifting a powder layer.

Could this architecture be faster then current 3d printers?

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Yes, there are such printers in existence already --- they either use a laser to melt a layer of metal powder, or spray a binding agent on a layer of plastic powder --- for the latter it's possible to include a colouring agent and get full-colour 3D plastic prints.

Search term is "Laser powder bed fusion" (as opposed to the trademark: "Direct Metal Laser Sintering" as was pointed out below)

https://www.3dsourced.com/guides/direct-metal-laser-sinterin...

Laser powder bed fusion (L-PBF) is the more standardized term. DMLS was a trademark.

Photopolymer Resin based printing has been around for a while now. Not sure how much the light source matters / can improve the speed though.

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