BS EN 60825-4:2006+A2:2011

This part of IEC60825 specifies the requirements for laser guards, permanent and temporary (for example for service), that enclose the process zone of a laser processing machine, and specifications for proprietary laser guards. This standard applies to all component parts of a guard including clear (visibly transmitting) screens and viewing windows, panels, laser curtains and walls. Requirements for beam path components, beam stops and those other parts of a protective housing of a laser product which do not enclose the process zone are contained in IEC60825‑1. In addition this part of IEC60825 indicates: how to assess and specify the protective properties of a laser guard; and how to select a laser guard.