Laser Etching

That is amazing to me. How come there is not residue, like scorch marks, burns left by that? Even in metal I would think it would need clean up of darken along the cut when done....
 
I believe that is a very high power galvo laser. Even more amazing when you learn how the beam is controlled.

Picture a high power laser beam coming at you thru a window. You have a small mirror in your hand. Now quickly move the mirror around to direct the laser beam to the work surface as needed.

I think it is really done with a mirror that has two speaker type cones mounted on two different axis. Incredible how it can work at all never mind that fast and accurate.
 
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