Tightly woven fabrics and opaque gloves provide the best protection. A laboratory jacket or coat can provide protection for the arms. Semiconductor lasers, sometimes called diode lasers, are not solid-state lasers. Adjustments or procedures during service on the laser shall not cause the safety interlocks to become inoperative or the laser radiation outside a Class I laser protective housing to exceed the MPE limits, unless a temporary laser-controlled area is established. Laser Accessories The hardware and options available for lasers, such as secondary gases, Brewster windows, Q-switches and electronic shutters. The options include: Nondefeatable Entryway Controls. A nondefeatable control, such as a magnetic switch built into the entryway door which cuts the beam off when the door is opened, is one option. In this case, training is required only for those persons who regularly work in the laser area. Such optical filter interlocks are required for all except Class I lasers.
The value gives the full angle at the point where the laser radiant exposure or irradiance is e-1 or e-2 of the maximum value, depending upon which criteria is used. Optical Cavity (Resonator) Space between the laser mirrors where lasing action occurs. Inclusion of the master switch control on Class IIIB lasers and laser systems is also recommended but not required. Diverging light may be collimated by a lens or other device. Gas Laser A type of laser in which the laser action takes place in a gas medium.
Such laser uses will require that the LSO conduct a hazard analysis and NHZ assessment. Pulse Duration The «on» time of a pulsed laser, it may be measured in terms of milliseconds, microseconds, or nanoseconds as defined by half-peak-power points on the leading and trailing edges of the pulse. Helium-Neon (HeNe) Laser A laser in which the active medium is a mixture of helium and neon. Appendix III:6-4. Warning Signs Figure III:6-2. Caution Figure III:6-3. Danger Figure III:6-4. Laser Repair Notice Appendix III:6-5. Glossary of Laser Terms Absorb To transform radiant energy into a different form, with a resultant rise in temperature. Absorption Transformation of radiant energy to a different form of energy by the interaction of matter, depending on temperature and wavelength. Duration of the exposure and pulse repetition characteristics, where applicable.