Focus Testing

A project log for Building Another Laser Cutter

Building a laser cutter around a Coherent GEM-50L laser

Jerry BiehlerJerry Biehler 03/07/2021 at 05:090 Comments

Focus testing the laser. Made a little program that moves the z axis up .005" for every vertical line. From this I can find the narrowest line and find the focus offset from the nozzle tip. 

Top test is with he 1.5" focal length lens. The bottom two are with the 3" lens. You can see how much deeper the depth of focus is with the 3" lens.