Lasers are divided into four safety classes. The welding lasers for plastics are always of the highest laser class 4. Built into a closed housing with safety sensors, so that the laser can only emit when all doors are closed, become laser class 1. Systems like our Turnkey S and M machines are laser class 1 in respect to the welding laser.
In respect to the red pilot laser for setup, our machines are always of laser class 2.
Laser class 1 & 1M
With laser class 1, the accessible laser power is harmless or is not accessible by a safe housing.
With 1M, the laser radiation is harmless as long as no optical instruments such as magnifying glasses or binoculars are used.
Laser class 2 & 2M
Laser class 2 is only valid for lasers with visible light. They have a power < 1 mW. The eyelid closure reflex is sufficient as a protective function under normal circumstances.
With laser class 2M no magnifying instruments may be used, so that laser power into the eye cannot rise above 1 mW of laser class 2.
Laser class 3R & 3B
The laser class 3R is dangerous for the eye and laser class 3B for the skin with direct irradiation. The laser class 3R is limited to < 5 mW at visible wavelengths. The laser class 3B goes at visible and near infrared wavelengths up to 0.5 W.
If the laser beam is accessible, protective glasses must be worn.
Laser class 4
Laser class 4 is dangerous for the eye and the skin - even with diffuse scattered radiation. There is also a fire hazard for many materials.
For accessible class 4 lasers, it is essential to wear adequate safety glasses and prevent radiation on the skin.