Section R. 325.68102 - Nonionizing radiation; laser equipmentRule 2.
(1) Only qualified and trained employees shall be assigned to install, adjust, and operate laser equipment.(2) Proof of qualification of the laser equipment operator shall be available and in possession of the operator at all times.(3) Employees, when working in areas in which a potential exposure to direct or reflected laser light greater than 0.005 watts (5 milliwatts) exists, shall be provided with the following antilaser eye protection devices: (a) Employees whose occupation or assignment requires exposure to laser beams shall be furnished suitable laser safety goggles which will protect for the specific wavelength of the laser and be of optical density (O.D.) adequate for the energy involved. Table E-3 lists the maximum power or energy density for which adequate protection is afforded by glasses of optical densities from 5 to 8. TABLE E-3
SELECTING LASER SAFETY GLASS
| Intensity, Attenuation CW Maximum Power Density (watts/cm2) | Optical Density (O.D.) | Attenuation Factor |
| 10-2 | 5 | 105 |
| 10-1 | 6 | 106 |
| 1.0 | 7 | 107 |
| 10.0 | 8 | 108 |
Output levels falling between lines in this table shall require the higher optical density.
(b) All protective goggles shall bear a label identifying the following data: (i) Laser wavelengths for which use is intended.(ii) Optical density of those wavelengths.(iii) Visible light transmission.(4) Areas in which lasers are used shall be posted with standard laser warning placards.(5) Beam shutters or caps shall be utilized, or the laser turned off, when laser transmission is not actually required. When the laser is left unattended for a substantial period of time, such as during lunch hour, overnight, or at change of shifts, the laser shall be turned off.(6) Only mechanical or electronic means shall be used as a detector for guiding the internal alignment of the laser.(7) The laser beam shall not be directed at employees.(8) When it is raining or snowing, or when there is dust or fog in the air, the operation of laser systems shall be prohibited where practicable; in any event, employees shall be kept out of range of the area of source and target during such weather conditions.(9) Laser equipment shall bear a label to indicate maximum output.(10) Employees shall not be exposed to light intensities above any of the following: (a) Direct staring: 1 micro-watt per square centimeter.(b) Incidental observing: 1 milliwatt per square centimeter.(c) Diffused reflected light: 2 1/2 watts per square centimeter.(11) Laser unit in operation shall be set up above the heads of the employees, when possible.(12) Employees shall not be exposed to microwave power densities in excess of 10 milliwatts per square centimeter.(13) This rule replaces O.H. rule 6270.Mich. Admin. Code R. 325.68102