For class 2 lasers, the accessible laser radiation is between 400 nm and 700 nm and thus in the visible spectral range. Class 2 lasers are not dangerous to the human eye if exposure is limited to less than 0.25 seconds. It is possible to operate these laser systems without additional protective equipment - as long as the operator does not regularly look into the beam for more than the recommended limit of 0.25 seconds to operate the laser.
Laser class 2 is the most underestimated laser because, though it is generally safer to operate than a class 4 laser, staring directly at the beam for more than 0.25 seconds can result in permanent (!) eye damage. Human eyelid closure reflexes or aversion reactions are not (!) present in these types of beams in 4 out of 5 individuals. Properly classified laser class 2 lasers are not toys and should be used responsibly.
- Laser pointers
- Laser spirit levels
- Light curtains