BeamMonitor BM+
35,0(6
11
Revision 02/2019 EN
5
Introduction
5.1
System description
The BeamMonitor BM+ is an opto-mechanical scanning measurement system for analyzing continuous irra-
diation. The device measures the power density distribution of the raw beam. The LaserDiagnosticsSoftware
LDS uses this to calculate the beam position, beam dimensions, beam symmetry, and power density distri-
bution.
The BeamMonitor BM+ can be mounted in any desired position.
5.2
Measuring principle
The BeamMonitor BM+ is used to analyze the unfocused, continual, high-power laser beam of CO
2
or NIR
lasers.
A rotating measuring tip scans the laser beam along the x-axis. During this process, the very small mirror in
the measuring tip separates out a small part of the radiation.
The horizontal carrier moves the measuring tip along the y-axis in order to measure the beam properties of
the laser beam on the x-y-plane. Another mirror finally guides the measurement signal to the detector.
Detector
Horizontal carrier
Measuring tip
with mirror
x
y
Laser beam
y
x
Mirror
Fig. 5.1:
Optomechanical design of the BeamMonitor BM+
Using various detectors with varying degrees of sensitivity, the BeamMonitor BM+ can be adapted to meet
the unique demands of beam diagnostics within a broad wavelength and power density range.
