Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser.Ĭlass 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. A description of each class of laser is given below: Class The IEC document 60825-1 outlines the safety of laser products. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. Lasers are categorized into different classes according to their ability to cause eye and other damage. ![]() Do not use Laser Viewing Cards in place of a proper Beam Trap.Use a laser sign with a lightbox if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).Post appropriate warning signs or labels near laser setups or rooms.Use beam shutters and filters to reduce the beam power.If possible, reduce the output power of a laser during alignment procedures.Operate a laser at the minimum power necessary for any operation.Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.Carry out experiments on an optical table such that all laser beams travel horizontally.All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use. ![]()
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