5.5mm endoscope borescope laser adapter
thingiverse
Looking at a blue laser diode based cutter or engraver when it is working is very enjoyable though potentially a very dangerous experience for your eyes. We only have two, direct or reflected 405/450nm WILL eventually destroy them. This is specially true when the only protection is wearing the typical green or red 'safety' glasses provided by cutter/engraver vendors. The best solution is to NOT LOOK at the laser at all !!! This adapter is designed for any of the 5.5mm endoscope/borescope you can find easily online for about 10€. You will need 5xM3 and 2xM2.
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