THORLABS M2MS, Operating Manual

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BP209 Series 7 Operation Instructions
Page 124
21424-D02
After the measurement is finished, below the diagram the Divergence results for the X and Y
axes are displayed. The indicator to the left shows if the measurement was successful.
The red marked button between the toolbar and the diagram expands the diagram over the
entire Divergence window.
3. Numeric Results
In this area, the beam quality measurement results are displayed in detail. Please see section
Divergence Measurement Results for more details.
4. Position Bar
The Position Bar below the Divergence Diagram shows the actual position of the translation
stage as seen before in the
Alignment tab.
5. Individual Data Points
Select the Number of the desired measured data point in the header of this sub-panel. For this
selected point, the position of stage and the profile in X and the Y of the beam is displayed. The
table
Calculation Results of the Selected Point to the right contains the following information:
Parameter What does it show?
Position Shows the actual Z position of the translation stage in mm.
Azimuth Angle [deg] The displayed value is not relevant, it is always equal to 90°.
Ellipticity
The ellipticity of the fitted to an ellipse beam (see Application Note )
Beam Diameter X' [µm]
Beam Diameter Y' [µm]
Depending on the settings , the beam diameter is displayed based
on Gauss fit, approximated ellipse or Beam Width Clip (1/e²).
The coordinate system is always related to the slit coordinates as
marked on the front panel of the Beam Profiler.
Centroid Position X'
Centroid Position Y' The positions of the beam centroids related to the slit coordinates as
marked on the front panel of the Beam Profiler.
6. Status Bar
· Measurement progress bar
· Total number of measured data points
· Beam width setting for divergence measurement
· Delay Line: Measurement range (difference between Start and Stop positions)
· Wavelength setting (not relevant for divergence calculation)
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