Klassen är ju beroende på styrkan alltså hur många watt den är på. Klassificeringarna är till för säkerhetsskäl.
Saxxat från
http://www.nsls.bnl.gov/newsroom/pub...PRM-2.3.1.html
3.1 ANSI Hazard Class 1, Exempt Lasers cannot emit levels of radiation above the Maximum Permissible Exposure under any exposure condition inherent to the design of the laser. There are no specific safety requirements for operating Class 1 lasers.
3.2 ANSI Hazard Class 2 and 3a, Low-Power Visible Continuous Wave Lasers can only emit visible radiation of sufficiently low power. Precautions for Class 2 lasers prohibit continuous focus into a direct beam or a beam reflected from a mirror-like surface into a person's eye. Warning signs and registration with the BNL LSO are necessary when operating Class 2 and 3a lasers.
3.3 ANSI Hazard Class 3b, Medium-Power Lasers are potentially hazardous if the direct beam or a reflected beam is intercepted by the unprotected eye. The operation of Class 3b lasers requires that authorized personnel have access exclusively. For details on Class 3b lasers, see the Program Requirements below.
3.4 ANSI Hazard Class 4, High-Power Lasers may cause skin injury and represent a potential fire hazard. The operation of Class 4 lasers requires the entire beam path be controlled. The laser shall be operated in designated areas where safety interlocks are used to prevent unexpected entry into the controlled area. Class 4 lasers shall be provided with interlock devices controlled by an authorized user. For details on Class 4 lasers, see the Program Requirements below. All Class 4 laser system interlocks are installed and tested by the NSLS Interlock Working Group
