Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 82

Current laser safety standards throughout the world follow the practice of categorizing all laser products into several hazard classes, and control measures are specified for each class, based upon the actual hazards posed by the laser beam. Generally, the scheme follows a grouping of four broad hazards classes: 1 through 4. Class 1 laser products cannot emit potentially hazardous laser radiation and poses no health hazard. Classes 2 through 4 pose an increasing hazard to the eye and skin. The classification system is useful, since safety measures are prescribed for each class of laser. More stringent safety measures are required for the highest classes.

The laser safety classification system greatly facilitates the determination of appropriate safety measures. Laser safety standards and codes of practice routinely require the use of increasingly more restrictive control measures for each higher classification. Hence routine measurements are normally not required.