BeamMonitor BM+
35,0(6
10
Revision 02 EN - 02/2022
4
Device description
4.1
Device type overview
There are two types of the BeamMonitor BM+.
BeamMonitor BM+ 60
BeamMonitor BM+ 100S
Fig. 4.1:
Device types BM+ 60 and BM+ 100S
4.2
Functional description
The BeamMonitor BM+ is an opto-mechanically scanning measuring system that scans the laser beam with
a special measuring tip. This is equipped with a small pinhole or reflecting mirror that collects a small section
of the laser beam. Another reflecting mirror guides this portion of the laser light to a detector selected and
configured depending on the used wavelength.
By moving the rotary disk forth a power density distribution is created. The high orbital velocity of the rotating
measuring tip facilitates analysis of high power densities. A very high signal-to-noise ratio is achieved thanks
to the dynamics of the analog-digital converter used. Very low intensities are shown with equal precision next
to the high peak intensities.
4.3
Measuring principle
Using the new LaserDiagnosticsSoftware LDS you can set up the BM+ to automatically repeat measure-
ments in a predefined interval. Accumulate unlimited measurements and check how the beam profile or loca-
tion changes over a long time. For the consideration of shorter time intervals the established Linescan can be
used up to a frequency of 25 Hz.
With a newly developed algorithm, the automatic recognition and analysis of rectangular beams becomes
quite straightforward. Besides the lateral length, many unique parameters like the azimuth angle, flank steep-
ness, flatness and uniformity are precisely calculated.
Detector
Horizontal carrier
Measuring tip
Rotary disk
x
y
Laser beam
y
x
Mirror
Fig. 4.2:
Optomechanical design of the BeamMonitor BM+
