THORLABS M2MS, Operating Manual

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BP209 Series 6 The Graphics User Interface (GUI)
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21424-D02
6.5.4.8 Unit
The measurement units that are displayed in the Beam Software can be selected in the Unit
topic.
Position units: µm .
Total Power units: mW or dBm .
Temperature: °C , °F or K .
(Temperature is measured by an external Thorlabs TSP01 Envir-
onmental Sensor, connected via USB (not included).)
The following table gives an overview on all available units:
Unit Description
µm Location, width or distance in µm. The origin of the coordinate system (X=0, Y=0) is
the sensor center, not the image center!
Positive X values go to the right, positive Y values to the top of the image.
Value range: - 4500 to + 4500 µm.
mW The Total Power of the beam is calculated from measurement of the total photo di-
ode current, using its typical wavelength dependent responsivity and the power cor-
rection value.
dBm The Total Power translated from mW into dBm: 10 * log (P[mW]). 0 dBm = 1 mW
% Relative level between 0 and 100%
deg Angle in degree with respect to the X axis, range -90 to +90 deg
6.5.5 Plot Over Time Parameter
The Beam Software allows to show different plots of beam measurements:
Plot Positions
Plot Power
Plot Diameters
Plot Gaussian Fit
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