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Device description
4.2
Functional description
The FPM is designed for laser beam measurement. The beam quality is controlled by means of periodic
measurements which ensures the process quality. The following parameters are measured:
•
Laser power
•
Power density distribution
•
Beam position and beam geometry
•
Caustic of laser beams
The FPM consists of three main components: the power measuring unit, the beam analysis unit and the
PROFIBUS
or PROFINET
®
An electrically operated shutter protects the beam entrance from pollution.
In addition, an exchangeable protective window is integrated. It is constantly surrounded by compressed air.
The compressed air is required to create an overpressure in the housing, which prevents the penetration of
dirt particles.
Control
Fig. 4.1:
Block diagram of the FPM
Revision 06 EN 02/2023
interface. These components are included in a stable aluminium housing.
®
Data
+24 V
FocusParameterMonitor FPM
®
PROFIBUS
/
®
PROFINET
Interface
Beam Analysis
Power
Measurement
11
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