Hi! My laser has a beam diameter of 0.6mm at the output. This makes it kind of hard to see the beam I think. I believe that a larger beam diameter would make it more visible and less dangerous as the energy density becomes lower. Has anyone here used a beam expander? Can you confirm my theories on this? Making one should be really easy...
http://www.winlens.de/fileadmin/user...x_englisch.pdf