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The laser is below the resin container? How does that work?

Is there a similar built device that you know of?

The formlabs form 1 is a good example: http://formlabs.com/products/form-1/

Awesome, thanks, that makes sense now.

Apologies! My bad! This is actually a Photolithographic printer

edit: also here's the link to the HN discussion of this printer https://news.ycombinator.com/item?id=6424132