© 2011 Thorlabs
113Operating the Beam Profiler
The green bulb indicates that the measurement was successful and fulfills the ISO
11146 standards.
In the case of a non ISO compliant measurement (not 4 diameters but elliptical
approximation was selected, see M² Settings ) a successful measurement is
shown without the ISO indication.
In general the axes X' and Y' do not coincides with the lab system which is described
by the axes X and Y. Furthermore the M² value for X' is independently from the one of
Y'. For highly elliptical beams like from semiconductor lasers M
2
X' and M
2
Y' differ
much more as in this example.
These values can also be found in the listing of the complete Results.
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