What are the three types of lasers categorized by their classification?

The classification of lasers is essential for understanding their potential hazards and the necessary safety measures to take when working with them. The correct answer identifies the broad range of laser classifications: Class 1, Class 2, Class 3, and Class 4.

Class 1 lasers are considered safe under all conditions of normal use. Class 2 lasers emit visible light and pose minimal risk because the human eye will naturally blink or look away within a fraction of a second. Class 3 lasers are further divided, with Class 3A presenting a low risk of eye injury and Class 3B being capable of causing injury with direct exposure. Finally, Class 4 lasers are high-powered and can cause severe eye and skin damage; they also pose fire hazards.

This classification system is important for establishing safety protocols and ensuring that laser users take appropriate precautions according to the potential risks associated with each class. Understanding these categories helps professionals determine the necessary protection measures when interfacing with different types of lasers.