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MSM+ HB
Option
Calibrated wavelength(s) in nm *
Used wavelength in nm *
Magnification
Focal length of focusing optics in mm *
Trigger
Drop-down list for trigger selection
TriggerDelay in ms *
Tab. 9.10:
Options in the Device control > Advanced tab of the Automatic caustic measuring mode
Revision 00 EN - 02/2022
Explanation
X Select the calibrated wavelength in the drop-down list.
The values displayed correspond to the calibration points of the
measuring objective. The correct value should be selected before each
measurement to enable high measurement accuracy.
Use one of the following options to set the used wavelength of the laser:
X Enter a value in the input field.
X Use the slider below the input field.
This parameter must be distinguished from the factory calibrated wave-
length of the measuring objective. The exact value should be entered,
because it is used for calculating the significant beam quality factor M².
The wavelength used should approximately match the calibrated wave-
length. To enable high measurement accuracy, a pre configured accep-
tance range must be observed. For example, if the calibration point
1 064 nm is selected, measurements can be taken in a range between
1 030 and 1 100 nm with high measurement accuracy.
Hence the value from the Calibrated wavelength in nm option is au-
tomatically adopted in the input field if a new selection was made there.
If this value is replaced by an impermissible high / low value, the imper-
missible value is automatically overwritten with the maximum / minimum
permissible value.
This field displays the magnification of the measuring objective.
X Enter the focal length used by the focusing optics of the laser
system.
The caustic fit and the entered focal length are used to calculate the raw
beam diameter on the focusing optics.
Drop-down area for displaying the options of the trigger operation.
The trigger operation is suitable for measuring special pulsed beams.
Detailed information on this topic can be found in the chapter 16.3 on
page 110.
This drop-down list is only visible if the drop-down area for displaying the
options of the trigger operation is open.
You can select from the following options:
•
UseNoTrigger: Switches to the default cw / quasi-cw operation.
•
UsePhotoTrigger: Switches to a trigger operation in which the
measurement is triggered internally. The signals come from the
photodiode built into the device.
•
UseExternalTrigger: Switches to a trigger operation in which the
measurement is triggered externally. The trigger signals enter the
device via the BNC socket.
This drop-down list is only visible if the drop-down area for displaying the
options of the trigger operation is open.
The trigger delay specifies the period between the trigger signal and the
beginning of the integration time. Use one of the following options to set
the trigger delay time:
X Enter a value in the input field (0.012 ms to 400 ms).
X Use the slider below the input field.
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