Laser safety is the avoidance of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to permanent eye injuries, the sale and usage of lasers is typically subject to official regulations. Besides, pay attention to the damage of laser to the human skin.
Below, the main characteristics and requirements for the classification system from 2002 are listed, along with typical required warning labels. Additionally, classes 2 and higher must have the triangular warning label shown here and other labels are required in specific cases indicating laser emission, laser apertures, skin hazards, and invisible wavelengths.
Laser Safety Level
Class 4: Laser Marking/Welding/Cutting
Class 3R: Laser Show
Class 3B: Laser Rangefinder
Class 2: Laser Scanner, Laser Level Instrument, Laser Pen
Class 1: DVD Player, Low Power Optical Fiber Communication Laser