THORLABS BC207UV, Operating Manual

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BC207 Series Chapter 6: Operation Instructions
Page 133
MTN026962-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 the 2D projection of the beam is displayed. The
table
Calculation Results of the Selected Point to the right contains the following information:
Parameter Explanation
Position [mm] The actual Z position of the translation stage for the selected data
point.
Azimuth Angle [deg]
For 4 s beam widths the azimuth angle is the absolute azimuth angle,
calculated in accordance with ISO11146-1 using the 4 s beam widths.
Note that the rotation range is not identical to the Orientation used
for the ellipse. Rotation angle range:
In case of ellipse clip level beam width the azimuthal angle shows a
difference angle to a reference angle. The latter is calculated from ten
frames at the beginning of each beam quality measurement.
Ellipticity
The ellipticity of the fitted to an ellipse beam (see Application Note
).
Beam Diameter X' [µm]
Beam Diameter Y' [µm]
For 4 s beam widths these are the ISO11146 compliant 4 s beam dia-
meters in the transformed coordinate system (not lab system) at the
actual Z position.
In case of ellipse clip level beam widths the shown values are the
minor and major ellipse axes.
Centroid Position X'
Centroid Position Y' The positions of the beam centroids.
6. Status Bar
·
Measurement progress bar
·
Total number of measured data points
·
Beam width setting for divergence measurement
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