[hackerspaces] Laser cutter: Buy or build? Both?

[Bryan Bishop]

On Fri, Apr 13, 2012 at 12:12 AM, charlie x <charlie at finitemonkeys.com> wrote:
> I do want to go back to building our own with the 40W tube, and we will do something with it
> eventually, well apart from fire it up with just the tube and power supply and burning holes
> in things.

At the risk of risky thread hi-jacking, does anyone have suggestions
for the optics and lenses on a "nearly submicron" laser cutter? I am
putting together what will eventually be an open source project
running LinuxCNC, but I am somewhat shaky on how to make sure I get a
spot size on the order of 1 to 10 microns (ok, maybe up to 20). Any
takers ?

- Bryan
http://heybryan.org/
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