Laser Safety Officer (AF) Exam
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New Update
Class 1 Laser Classification - ✔✔- cannot emit laser radiation at levels that are
known to cause eye or skin injury during normal operation
-very low power or beam is fully enclosed
Class 1M Laser Classification - ✔✔-incapable of hazardous exposure conditions
during normal ops unless viewed with collecting optics (binoculars)
-exempt from control measures, other than to prevent optical aided viewing
-exempt from other forms of surveillance
Class 2 Laser Classification - ✔✔-low power, emit in visible spectrum (400-700
nm)
-not considered strong enough to damage eyes because a person will normally
blink and look away if it enters their eyes (aversion response)
Class 2M Laser Classification - ✔✔-potentially hazardous if viewed with
collecting optics
-upper limit on a continuous wave laser in this class is 500 mW
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,Class 3R Laser Classification - ✔✔-intermediate powered, hazardous under
direct and specular reflection viewing
-can produce no more that 5 mW in the visible region
Class 3B Laser Classification - ✔✔-hazarous under direct and specular reflection
viewing
-not normally a diffuse reflection or fire hazard
operate between 5-500 mW for CW systems
cannot produce radiation energy greater than 0.125 J for pulsed systems
Class 4 Laser Classification - ✔✔-high power, hazardous to eye or skin from
direct beam
-may pose a diffuse reflection or fire hazard
-pose ancillary hazards including laser-generated air contaminants and
hazardous plasma radiation
Laser components - ✔✔-pumping system
-lasing medium
-optical cavity
Pumping System - ✔✔-source of power that excites the lasing medium in order
to create photons for the laser beam
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, -can be an electrical source, a flash lamp or another laser
Lasing Medium - ✔✔-what determines the wavelength of the system
-four types: solid state, gas, dye, and semiconductor
Optical Cavity - ✔✔-contains the lasing medium and reflective mirrors that
guide the laser beam
-provide amplification to create the desired laser parameters
LASER acronym - ✔✔Light
Amplification by
Stimulated
Emission of
Radiation
Beam Characteristics - ✔✔-monochromatic
-coherent
-collimated
Monochromatic - ✔✔-light emitted by a laser is almost pure in color of a single
wavelength
Coherent - ✔✔-measure of the degree of phase correlation that exists in the
radiation field of a light source at different locations and different times
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©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
Questions with 100% Verified Answers |
New Update
Class 1 Laser Classification - ✔✔- cannot emit laser radiation at levels that are
known to cause eye or skin injury during normal operation
-very low power or beam is fully enclosed
Class 1M Laser Classification - ✔✔-incapable of hazardous exposure conditions
during normal ops unless viewed with collecting optics (binoculars)
-exempt from control measures, other than to prevent optical aided viewing
-exempt from other forms of surveillance
Class 2 Laser Classification - ✔✔-low power, emit in visible spectrum (400-700
nm)
-not considered strong enough to damage eyes because a person will normally
blink and look away if it enters their eyes (aversion response)
Class 2M Laser Classification - ✔✔-potentially hazardous if viewed with
collecting optics
-upper limit on a continuous wave laser in this class is 500 mW
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©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
,Class 3R Laser Classification - ✔✔-intermediate powered, hazardous under
direct and specular reflection viewing
-can produce no more that 5 mW in the visible region
Class 3B Laser Classification - ✔✔-hazarous under direct and specular reflection
viewing
-not normally a diffuse reflection or fire hazard
operate between 5-500 mW for CW systems
cannot produce radiation energy greater than 0.125 J for pulsed systems
Class 4 Laser Classification - ✔✔-high power, hazardous to eye or skin from
direct beam
-may pose a diffuse reflection or fire hazard
-pose ancillary hazards including laser-generated air contaminants and
hazardous plasma radiation
Laser components - ✔✔-pumping system
-lasing medium
-optical cavity
Pumping System - ✔✔-source of power that excites the lasing medium in order
to create photons for the laser beam
Page 2 of 26
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
, -can be an electrical source, a flash lamp or another laser
Lasing Medium - ✔✔-what determines the wavelength of the system
-four types: solid state, gas, dye, and semiconductor
Optical Cavity - ✔✔-contains the lasing medium and reflective mirrors that
guide the laser beam
-provide amplification to create the desired laser parameters
LASER acronym - ✔✔Light
Amplification by
Stimulated
Emission of
Radiation
Beam Characteristics - ✔✔-monochromatic
-coherent
-collimated
Monochromatic - ✔✔-light emitted by a laser is almost pure in color of a single
wavelength
Coherent - ✔✔-measure of the degree of phase correlation that exists in the
radiation field of a light source at different locations and different times
Page 3 of 26
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
