I recently got a new Macbook Pro, and I was thinking of what to etch the lid with. (Most metals won’t etch — let alone cut — on our 40W laser cutter, but anodized aluminium is the exception.) Laser cutters work best with vector drawings; you can etch raster images but on our machine this leaves a “shadow” on anodized aluminium due to the laser starting up.
So I wanted a cool vector image to etch my laptop with, and I decided to use a picture of a particle collision in a bubble chamber. I found this image and traced it using Inkscape. I’m pretty happy with the result.