This is a quick hack to visualise the real shape of the beam, using LD33 Plastazone foam, which just goes away when it sees a sniff of a beam.
The first test was with the cone still fitted. I was expecting a much more conical cut. This would actually be a usable kerf width for some projects!
https://photos.app.goo.gl/j3jkZzHTjd4sCTQG6
The second test was without the cone, so the foam could be much closer to the lens. Much more of the beam taper is visible:
https://photos.app.goo.gl/kdTqPdAAA3jgHpRw8
