How many lenses are there on the head of the laser welder? What is the function of the lens?
The lenses focus the laser beam to make it possible to weld
Laser welding machine on the head of the outermost lens, its role is to protect the mirror, used to protect the laser head, the protective mirror dirty, flowers can also be replaced, with the mobile phone film is a meaning
To be on the safe side, it should be used to block the spatter of welding sparks!
