THORLABS BC106-UV, Operation Manual

Page: 123 / 167

© 2011 Thorlabs
121 Operating the Beam Profiler
The panels of the Calculation To Actual Z Position and Results are described in
the M² Measurement section.
3.5.7.2 Divergence Measurement Settings
For a successful and reliable measurement it is essential to adapt the settings of the
software.
Click on to enter the Divergence Measurement Settings .
Beam Width
The Beam Width can be selected from the two already known methods.
The calculation of the
4 Diameter follows the ISO 11146-1:2005 standard.
The Approximated Ellipse beam width is based on the 13.5% clip level. At the
beginning of a measurement a reference angle is determined by averaging over 10
frames. This angle is then used to evaluate all following frames and ellipses.
Measurement Parameters
Timeout
is the max. waiting time for a valid camera image. This is to allow the
Autoexposure function to obtain a valid camera image
Wavelength is not relevant for divergence measurement.
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