According to current international standards, lasers are divided into 4 laser classes based on their danger to the human body. The laser class can be determined by considering multiple factors, such as power or wavelength. Assigning a laser to a laser class provides information about the possible hazards and indicates which protective measures are needed to ensure safe operation. A higher laser classification indicates a higher potential hazard. This means, if a laser is class 1, the accessible laser radiation is not dangerous under reasonably foreseeable conditions. While the accessible laser radiation of a class 4 laser is hazardous for the eye and dangerous to the skin. So all safety measures aim at achieving a low (best case class 1) rating of the laser installation to ensure safe operation in production environments.