Mich. Admin. Code R. 325.68102 - Nonionizing radiation; laser equipment
Rule 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.
Notes
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