The Laser has built in systems for protecting against damage from back
reflection at high power from highly reflective surfaces. The laser beam
delivery optic has been designed for, and rested in, on-axis applications
(operating the laser with the collimator at normal incidence to the work-piece).
However, ob-axis back reflections may trigger the built in protection systems
shutting the laser down. Please refer section 3 Operation Procedure for further
details regarding system protection