11
SAFETY FEATURES ON THE LASER UNITS
The aforementioned safety standards demand that some safety features are present on the laser units, in
order to inform the user about the laser radiation and prevent an accidental exposure. Some of these
features are only present on the plug-and-play versions of the combiners
LABELLING (ADVISORY LABELS)
It is the responsibility of the manufacturer to provide the correct classification of a laser, and to equip
the laser with the appropriate warning labels and safety measures as prescribed by the regulations.
The identification process is accomplished by affixing a warning label onto the product. Along with text
warnings, these labels include information pertaining to the emitted wavelength, the total output power
and the laser classification of the device.
See the following paragraph, “Labels on the product”.
APERTURE LOCATION
The laser radiation is generated within a protective housing which should only be opened by trained
operators. An aperture label indicates the position of the laser beam output (refer to figure 1-3).
REMOTE INTERLOCK
This function is usually used in conjunction with a door or a panel in order to control the access to the
irradiated area. The combiner features the remote interlock from a dedicated socket on the rear panel
(refer to chapter 3-2, “Instrument tour”). The laser emission is disabled as long as both terminals of the
connector are not electrically connected.
ACTUATED KEY MASTER CONTROL
The combiner is provided with an actuated key master control on its remote control (refer to chapter 2-
4, “Instrument tour”). This lock and key control the emission. The laser emission is not possible when the
key is absent from the lock, or when in “OFF” position. The key is removable only when in “OFF”
position.
EMISSION WARNING INDICATOR
Combiner controllers are provided with an emission indicator located on the remote control (refer to
chapter 2-4, “Instrument tour”). In compliance with CDRH requirements, this indicator is lit for 6 seconds
from the moment where the emission command is received to the moment where the laser is actually
emitting. It is thus providing a delay for the user to be warned about the imminent emission.
OPTICAL SHUTTER
Mechanical shutters, located at each output aperture of the combiner, allows for a complete extinction
of the beam.
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