Combined protective measures for Class 4 lasers may include:

Combined protective measures for Class 4 lasers often include a variety of safety strategies to protect personnel from potential hazards. The choice that encompasses effective protective measures is the implementation of physical barriers and warning signs. Physical barriers, such as protective enclosures or shields, help prevent unauthorized access to areas where Class 4 lasers are operated, significantly reducing the risk of accidental exposure. Warning signs serve as a crucial reminder of the potential dangers associated with these powerful lasers, alerting personnel to take necessary precautions.

While training personnel is essential for ensuring they understand how to safely operate and work around lasers, it is just one aspect of a comprehensive safety program. Eliminating all exposure is an ideal goal, but in practical terms, it may not be feasible in environments where Class 4 lasers are used. Using low reflectivity materials can be part of a broader strategy, but on their own, they do not provide the necessary protection against direct laser exposure. Therefore, combining physical barriers with clear warning signs properly addresses the safety requirements for handling Class 4 lasers.