GSI Group - Laser Division
JK300HP/JK300P/JK125P
Pre-installation and User Manual
Issue 2.0
Page 4 of 172
Part No: 1EA300E01
1.4 Table of Definitions
Name Definition
Aperture
An opening in the protective housing of a Laser enclosure or Laser unit
through which Laser radiation is emitted.
Assist Gas
Gas that is fed to the beam focus at the workpiece to assist the cutting
process. See Shielding Gas.
BCD
Binary Coded Decimal.
Beam Divergence
Laser beam diameter increases with increasing distance from the Laser
owing to beam divergence (i.e. spread). It is expressed as the angle (mrad)
the beam diameter increases per unit distance (mm).
Beam divergence can be used to predict the minimum beam diameter
achieved by focusing the beam with a lens.
Beam Dump
A device used to absorb beam energy when not required.
BET
Beam Expanding Telescope.
Beam Focus
The location beyond a focusing lens at which the beam diameter reaches a
minimum value or focal point.
Beam Tube
A length of metal or PTFE (Teflon) tube located between component
assemblies in the beam path. Prevents human access to the Laser beam
and the ingress of dust.
The Beam Tube is also known as the Gaiter.
Beam Path
Laser light directed to the workstation via a Shutter, Fibre and Focus Head.
Multiple fibres can be accommodated in Timeshare and Energy Share
configurations. See Timesharing and Energy Sharing.
Beam Stop
A device that stops a Laser beam path.
Beam Quality
Beam quality is defined using beam radius and half angle divergence and
relates to 86.5% of enclosed power (ISO 11146).
Continuous Wave
Laser operating and continuously emitting radiation over periods of time
greater than or equal to 0.25 seconds.
Depth of Focus
When a lens focuses a Laser beam to a small diameter, the Depth of
Focus is that distance along the lens axis over which the beam may still be
considered focused. Depth of Focus is defined as the axial distance over
which the beam diameter is no more than 10% larger than the minimum
diameter at the beam focal point.
Energy Sharing
The ability to share the laser beam down more than one fibre at the same
time. See Beam Path.
Eyewear
Personal Protective eyewear that prevents Laser radiation reaching the
eye directly. Laser safety eyewear reduces the incident light to a safe
level, provided it is used correctly.
Fume
Airborne grit, particles, smoke, dust, vapours and gases generated by
Laser processing of materials.
Graphical User
Interface (GUI)
Graphical User Interface. The software for this interface between the
Operator and the Laser System is called Laserview
TM
SE. The Laserview
TM
SE software can be run on either a Personal Computer (PC) or on an
Industrial Touch Screen Computer. See also the Universal Front Panel
(UFP).
Intensity
Beam intensity is strictly the power per unit area (Wcm
2
) of beam cross-
section. Intensity is also energy density - the energy per unit area of beam
cross-section.
Invisible
Light outside the visible wavelength range 400 to 700nm.
Petitioners Canadian Solar Inc. and Canadian Solar (USA) Inc.
Ex. 1025, p. 4
