THORLABS BC207UV, Operating Manual

Page: 128 / 181

BC207 Series Chapter 6: Operation Instructions
Page 121
MTN026962-D02
q
Error message
"The measurement is not ISO compliant, because there are not enough data points inside the
Rayleigh Length X (Y)(xx mm) or beyond twice the Rayleigh Length"
·
The software could not measure with the required resolution.
·
Increase the minimum number of data points (see M² Settings ).
·
If the error message persists, increase the scan range as well.
q
Error message
"The M2 measurement has been aborted because fit cannot be calculated."
· The calculation of the hyperbolic fit from the measured data points is impossible. Possible
reasons are, for example, that the beam waist is far away from the scan range, or that no
focal lens was used.
·
Reset the M² Settings to default - that sets the scan range to its maximum.
·
Check your setup to make sure the beam waist is within the scan range.
·
If no focal lens was used, only a divergence measurement is possible!
q
Error message
"Waist position outside the scan range. Extend the scan range or switch to divergence mea-
surement."
·
The calculation of the hyperbolic fit from the measured data points resulted in a beam
waist position outside the scan range. Usually this happens if the beam waist is close to
one of the scan end positions. Extend the scan range.
·
Reset the M² Settings to default - that sets the scan range to its maximum
106