PRIMES
BeamMonitor BM+ with LDS 2.98
39
Revision 01/2018 EN
11.1.5
Adjustment mode
This measurement and display menu is intended for the specific requirements as far as the adjustment of
laser resonators with the BeamMonitor BM+ is concerned. The beam symmetry of the power density distri-
bution measured last is presented.
Typical measuring procedure:
Automatic beam search with the button
FindBeam
, afterwards a monitor operation is started by means of
the
Continuous
button. With regard to this, the succeeding measurements are cyclically typed in into the
planes 0 to 19 (whereas 19 is then again followed by 0).
By means of the keys
>>AdjustingPanel
and
>>MeasuringPanel
you can choose between two different
kinds of notation. In the measurement menu of the adjustment mode a false color presentation of the last
two measurements together with the values of the beam position as well as the beam radius are displayed.
Fig. 11.7: The measuring menu of the adjustment mode
The second notation is the symmetry menu.
The symmetry menu compares the results of the last three measurements with regard to their beam sym-
metry in different power ranges.
Moreover, the following is displayed: the radius ratio between R
x
to R
y
(calculated by means of the 2
nd
moment
method) as well as the volume of the power density distribution (as a relative measure for the laser power).
The results are displayed numerically and emphasized visually by means of colored squares.
Green stands for a minimum deviation from the cyclical symmetry and red for the maximum deviation. Yellow
(white) indicates a medium value.
