Laser Safety Manual

29 Laser Safety Manual G. Laser Safety Practices The following measures are recommended as a guide to safe laser use. Some additional measures may be required for specific laser classes and lasers that emit UV or infrared radiation. Contact the Laser Safety Officer (LSO) for specific requirements. For general lab safety practices, see the Laboratory Safety Manual . Work Area Safety Practices • The laser beam must be enclosed as much as practical. • Laboratory must be closed and secured when unattended. • Warning labels and signage must be posted. • The room must be illuminated as brightly as possible. • The laser must be set up so that the beam path is either above 6.5 ft or below 4.5 ft. • To minimize reflections, shield or remove all unnecessary reflective surfaces. • Windows to hallways or other outside areas must have adequate shades or covers. • The main beams and reflected beams must be terminated or dumped. • Electrical installation must meet electrical safety standards. • Active laser must never be left unattended, unless it is a part of a controlled environment. Laser Use Safety Practices Use proper eye protection when working with Class 3B or Class 4 lasers. Safety glass lenses may shatter or melt when the lens specifications are exceeded. Scratched or pitted lenses may afford no protection. Eye protection is specific to a certain type of laser and may not protect at different wavelengths or powers. • Avoid looking into the primary beam at all times. • Align the laser with the proper eye protection • Avoid looking at the pump source. • Clear all personnel from the anticipated path of the beam. • Before operating the laser, warn all personnel, and visitors of the potential hazard and ensure all safety measures are satisfied.