What distinguishes class 3B lasers from class 3R lasers?

The distinction between class 3B lasers and class 3R lasers largely revolves around their potential hazards and safe handling practices. Class 3B lasers are considered unsafe for diffuse viewing, which means that direct exposure to the beam can cause harm or injury, even if the light is scattered or diffused. This level of risk requires specific safety measures and precautions to protect individuals in areas where these lasers are used.

In contrast, class 3R lasers are designated as relatively lower risk and are considered safe for diffuse viewing. This distinction allows for easier handling and use in certain applications without the stringent safety protocols required for class 3B lasers. Because of their lower emission power, 3R lasers pose a significantly reduced risk of injury from accidental exposure, making them a safer choice in environments where laser use is necessary.

Therefore, the primary difference lies in the safety implications associated with viewing the emitted light, wherein class 3B lasers present more serious safety concerns than class 3R lasers, which are deemed safer in terms of diffuse exposure.