
I.GLOSSARY APPENDIX B-70315EN/02
- 356 -
I GLOSSARY
Name Meaning
Access panel
Part of the protective housing or enclosure that, when removed or moved, will permit
exposure to laser radiation or collateral radiation beyond an allowable value.
AEL : Accessible
Emission Limit
Maximum accessible emission level set up for each class of laser products
Alignment Optical axis adjustment
Aperture Iris, or stop
Beam Aggregate of unidirectional, diverging, or conversing rays
Beam diameter
Defined as the distance between two symmetrical points on a beam cross section at which
the power per unit area is 1/e2 of the maximum power per unit area. At FANUC, however,
the diameter measured with an acrylic burn pattern.
Beam divergence Angle through which a beam spreads
Burn pattern
Laser beam mode pattern generated on a plate such as an acrylic plate for confirmation
purposes
Circular polarization
Polarization in which a plane of polarization rotates about the axis along which the light
progresses and does not have directivity; an electric or magnetic field based on circular
polarization has a constant intensity.
CO
2
laser Laser that uses a carbon dioxide gas as a laser medium
CW : Continuous wave Continuously radiated laser output
Cyclone A separator using centrifugal force.
dielectric An electric insulator.
Discharge excitation Realization of inverted population by means of discharge
Enhanced pulse Greatly amplified peak output of a pulse
Excitation
Transition of atoms or molecules to a higher energy level by supplying them with external
energy
Exposure time Duration through which laser radiation is emitted
Fast axial flow laser Laser in which gas flows rapidly in the same direction as the laser beam
Feedback control
Control in which the controlled amount is compared with the target value through feedback
and corrective operation is performed to make them match.
Laser Device for generating light by stimulated emission
Laser controlled area
Area in which activities are controlled or monitored for protection from hazards resulting
from laser radiation
Laser Diode Laser that uses a semiconductor as an exciting medium
Laser mirror Reflecting mirror used in a laser resonator
Laser safety officer
Person having sufficient knowledge about evaluation and management of hazards of
lasers and in charge of safety management of lasers
Laser safety standard
Standard to protect human bodies from hazards resulting from laser beams in view of use
of lasers and about laser products for sale
Linear polarization
Polarization in which a plain of polarization is at a constant angle with the axis along which
the light progresses
Maintenance
Action taken by a user to preserve normal operation of a product, such as adjustment or
other measures specified in documents created by the manufacturer for users
Matching circuit
If power is to be transmitted by connecting two different electric circuits, maximum power
can be sent by setting the circuits to appropriate conditions. A matching circuit is a circuit
that sets the circuits to appropriate conditions.