The protective lens is used in laser welding machines to prevent damage to the lens from splashes, dust, and particles coming from the workpiece. Over time, the protective lens in laser welding machines can become deformed with usage. Maintenance of the protective lens is performed at certain intervals depending on usage. To maintain the machine's initial performance, the deformed protective lens should be replaced with a new one.

It is compatible with NL1500W / NL2000W laser welding machines.