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Revision 00 EN - 01/2021
HP-MSM-HB
35,0(6
With the dialogue window
Measurement settings
either single measurements or repeated measurements
can be carried out. The measuring window position can be set either manually or automatically.
Controlling measuring modes (individual measurement, monitor, and video mode)
There is a total of three different measuring modes that can be selected here. In the
Individual Measure-
ment
and
Monitor
measuring mode, all necessary compensations (smear effect, diffusion) and exposure
time adjustments are performed every time a new measurement is carried out. Valid measuring data is gen-
erated in this mode.
The measuring mode
VideoMode
does not produce valid measurement data. Here the exposure time is
carried over from the last measurement and does not vary. Compensation measurements are not performed,
making it unnecessary to consider or compensate for measuring artifacts such as smear effects.
Due to the “high” measuring frequency of about 5 Hz, this operating mode is particularly suited for use when
aligning the device. The numeric results should not be interpreted absolutely, but rather always relative to
each other.
Power
The slider sets the actual laser power, so the software algorithm can calculate the spacial power density. It
can be set to any power up to the maximum.
The maximum power is entered in the menu under
Measurement > Environment
. The power density is
calculated in relation to the power values set here. Up to 50 individual measurements can be recorded in a
measurement file. The results can be easily compared and analyzed with the various presentation functions
of the LaserDiagnosticsSoftware LDS.
Optical amplification (opt. ampl.)
This function activates the automatic adjustment of the exposure time of the CCD for every measurement.
The function must be activated in order to keep the signal/noise ratio consistently high for a caustic measure-
ment.
For special measuring applications, however, it might make sense to deactivate this function and set the ex-
posure time to a fixed value between 12 µs and 200 ms. Here it is important to ensure sufficient attenuation
of the laser beam with the help of the fixed ND filter or the filter wheel.
Copy
Using the
Copy
button, you can apply the measurement settings for window size, window position, power,
and amplification from the previous measuring plane.
Beam search
The
Beam Search
will initiate an automatic beam search. When this happens, the system will only search
the area of the currently set window for the set z-position.
If the beam search is completed successfully, a measuring window with the appropriate size and position
will appear on the display screen. The beam can then be accepted using the
Start
button. The size of the
measuring window depends on the magnification of the measuring objective. The measuring objective and
the wavelength are the influencing variables here.
Scan
For devices such as the LaserQualityMonitor LQM, the measuring window is much smaller than the measur-
ing area defined with the x- and y-axis (2 mm x 2 mm). The beam search is therefore supplemented with the
Scan
command. Once a scan is initiated, the HP-MSM-HB will automatically sense the measuring area. If
a point of maximum intensity can be identified, the HP-MSM-HB will automatically zoom in on this area and
adjust the measuring window size accordingly.
Size of the measuring window
During a manual beam search, you can define the location and size of the measuring window yourself in
the dropdown menu within the mechanical limits. You can change the location of the measuring window by
clicking on it and dragging the frame with the mouse.
