Laser Safety Terms in ANSI UPDATED
ACTUAL Exam Questions and CORRECT
Answers
ablation - CORRECT ANSWER - tissue removal by laser action
Administrative control measure - CORRECT ANSWER - Control measures incorporating
administrative means , e.g., training safety approvals, LSO designation, and P&P, to mitigate the
potential hazards associated with laser use.
average power - CORRECT ANSWER - the total energy imparted during exposure
divided by the exposure duration
aversion response - CORRECT ANSWER - closure of the eyelid, eye movement, pupillary
constriction, or movement of the head to avoid an exposure to a noxious or bright light stimulant.
blink reflex - CORRECT ANSWER - lid closure associated with the involuntary upward
movement of the eye, triggered by an external event such as an irritation of the cornea or
conjunctiva, a bright flash, the rapid approach of an object, an auditory stimulus, or with facial
movements.
collateral radiation - CORRECT ANSWER - Any electromagnetic radiation, except laser,
emitted by a laser or laser system, which is physically necessary for its operation.
collimated beam - CORRECT ANSWER - Effectively, a "parallel" beam of light with very
low divergence or convergence.
Continuous Wave (CW) - CORRECT ANSWER - The output of a laser which is operated
in a continuous rather than a pulsed mode. In this standard, a laser operating with a continuous
output for a period >_ 0.25 seconds is regarded as a CW laser.
, Deputy Laser Safety Officer (DLSO) - CORRECT ANSWER - The person authorized and
responsible for managing the laser safety program, in the absence of the LSO.
diffraction - CORRECT ANSWER - Deviation of part of a beam, determined by the wave
nature of radiation and occurring when the radiation passes the edge of an opaque obstacle.
diffuse reflection - CORRECT ANSWER - Change of the spatial distribution of a beam of
radiation when it is reflected in many directions by a surface or by a medium.
divergence - CORRECT ANSWER - The increase in the diameter of the laser beam with
propagation distance from the exit aperture. Also known as Beam Spread.
embedded laser - CORRECT ANSWER - A laser with an assigned hazard classification
higher than the classification of the laser system in which it is incorporated, where the system's
lower classification is the result of engineering features which limit the accessible emission.
energy - CORRECT ANSWER - The capacity of doing work. Energy content is commonly
used to characterize the output from pulsed lasers, and is generally expressed in joules (J).
engineering control measure - CORRECT ANSWER - Control measures designed or
incorporated into the laser or laser system, e.g., interlocks, shutters, watch-dog timer circuits,
etc., or its application
extended source - CORRECT ANSWER - A source of radiation that can be resolved by the
eye into geometrical image, in contrast to a point source of radiation that cannot be resolved into
a geometrical image.
failsafe interlock - CORRECT ANSWER - An interlock where the failure of a single
mechanical or electrical component of the interlock will cause the system to go into, or remain
in, a safe mode.
ACTUAL Exam Questions and CORRECT
Answers
ablation - CORRECT ANSWER - tissue removal by laser action
Administrative control measure - CORRECT ANSWER - Control measures incorporating
administrative means , e.g., training safety approvals, LSO designation, and P&P, to mitigate the
potential hazards associated with laser use.
average power - CORRECT ANSWER - the total energy imparted during exposure
divided by the exposure duration
aversion response - CORRECT ANSWER - closure of the eyelid, eye movement, pupillary
constriction, or movement of the head to avoid an exposure to a noxious or bright light stimulant.
blink reflex - CORRECT ANSWER - lid closure associated with the involuntary upward
movement of the eye, triggered by an external event such as an irritation of the cornea or
conjunctiva, a bright flash, the rapid approach of an object, an auditory stimulus, or with facial
movements.
collateral radiation - CORRECT ANSWER - Any electromagnetic radiation, except laser,
emitted by a laser or laser system, which is physically necessary for its operation.
collimated beam - CORRECT ANSWER - Effectively, a "parallel" beam of light with very
low divergence or convergence.
Continuous Wave (CW) - CORRECT ANSWER - The output of a laser which is operated
in a continuous rather than a pulsed mode. In this standard, a laser operating with a continuous
output for a period >_ 0.25 seconds is regarded as a CW laser.
, Deputy Laser Safety Officer (DLSO) - CORRECT ANSWER - The person authorized and
responsible for managing the laser safety program, in the absence of the LSO.
diffraction - CORRECT ANSWER - Deviation of part of a beam, determined by the wave
nature of radiation and occurring when the radiation passes the edge of an opaque obstacle.
diffuse reflection - CORRECT ANSWER - Change of the spatial distribution of a beam of
radiation when it is reflected in many directions by a surface or by a medium.
divergence - CORRECT ANSWER - The increase in the diameter of the laser beam with
propagation distance from the exit aperture. Also known as Beam Spread.
embedded laser - CORRECT ANSWER - A laser with an assigned hazard classification
higher than the classification of the laser system in which it is incorporated, where the system's
lower classification is the result of engineering features which limit the accessible emission.
energy - CORRECT ANSWER - The capacity of doing work. Energy content is commonly
used to characterize the output from pulsed lasers, and is generally expressed in joules (J).
engineering control measure - CORRECT ANSWER - Control measures designed or
incorporated into the laser or laser system, e.g., interlocks, shutters, watch-dog timer circuits,
etc., or its application
extended source - CORRECT ANSWER - A source of radiation that can be resolved by the
eye into geometrical image, in contrast to a point source of radiation that cannot be resolved into
a geometrical image.
failsafe interlock - CORRECT ANSWER - An interlock where the failure of a single
mechanical or electrical component of the interlock will cause the system to go into, or remain
in, a safe mode.
