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4.3.2 LASER Menu
Within the laser menu you can set the optical power, the laser current, the laser mode and the laser
current limit.
Laser Current Limit
Set the laser current limit to the indicated maximum current value of the laser diode which can be
found in the individual data sheet. Setting the appropriate current limit protects the laser diode from
being overloaded electrically and optically.
Confirm the value with the Enter key. The value of the laser current limit is stored permanently in a
non-volatile memory, even when the instrument is switched off.
Remark: The maximum possible laser current limit is predefined by the instrument.
I - Laser Current
After schwitching on the instrument the set laser current is 0. It can be set up to laser current limit and
must not be confirmed with the Enter key.
The laser diode is turned on by pressing the Laser key (4) and the desired current is applied to the
laser diode. The lighting yellow LED (3) nearby the Laser key indicates that the laser diode output is
turned on. The actual current that is applied to the laser diode is displayed above left at the display.
The current applied to the laser diode can also be varied when the laser diode is turned on by
modifying the desired current with the Rotary knob (5).
The laser diode is turned off by pressing the Laser key (4) again.
P - Optical Power
After schwitching on the instrument the set optical power is 0. The set optical power will calculated into
the laser current by the calibration points (see menu calibration). After changing you must not confirm
with the Enter key. The calculated laser current will be shown immediately on position set laser
current. The optical power can also be varied when the laser diode is turned on. In this case the
calculated laser current is applied to the laser diode immediately.
Laser Mode
The operational mode should only be changed when the laser diode is turned off. Nevertheless when
changing the operational mode, the laser diode is turned off automatically.
The following four operational modes can be selected and combined:
CW, No Time Limit
The laser diode is operated with a continuous current. The duration of the
operation is not time limited internally. The laser diode is turned on and off by
pressing the Laser key.
CW, Time Limit
The laser diode is operated with a continuous current. The duration of the
operation is time limited according to the time limit, see menu TIMING. The
laser diode is turned on by pressing the Laser key and turned off
automatically after the set time limit.
Pulse, No Time Limit
The laser diode is operated with a pulsed current, see menu TIMING. The
duration of the operation is not time limited internally. The laser diode is turned
on and off by pressing the Laser key.
Pulse, Time Limit
The laser diode is operated with a pulsed current. The duration of the
operation is time limited according to the time limit, see menu TIMING. The
laser diode is turned on by pressing the Laser key and turned off
automatically after the set time limit.
Confirm the value with the Enter key. The desired mode is stored permanently in a non-volatile
memory, even when the instrument is switched off.
Summary of Contents for ldc1000
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