Ultraviolet (UV) light refers to electromagnetic radiation of 100-400nm wavelength, of which 100-200 nm is vacuum ultraviolet (VUV), vacuum ultraviolet radiation can excite air molecules, so the air is not transparent to vacuum ultraviolet, vacuum ultraviolet light transmission must be filled in vacuum or inert gas space.
180nm to 280nm is called deep ultraviolet, and 280nm to 315nm is called middle.
Ultraviolet, 315nm ~ 400nm is called near ultraviolet.
Videos – UV Laser
445nm 5.5W Laser Module Video Small Engraving Machine