Measurement methods – the principle
The combination of the proven PRIMES measurement techniques in a dust-proof housing suited to industrial use in combination with one of the fieldbus interfaces makes the HP-MSM-I an ideal tool for measurement in automated manufacturing.
The measurement optics and the beam attenuators from the HP-MSM and the familiar camera-based measurement principle are put to use here. Protected by the integrated protective glass changer, the gas flush for the beam entry and the mechanical closing device, a high reproducibility of the measurements is guaranteed. A second fibre from the laser, connected to the fibre adapter, enables the monitoring of the internal optics as well as those that contribute to focusing.
The recording of the laser power occurs according to the calorimetric principle and can be verified at any time by the integrated electrical reference. Following each measurement, all beam parameters measured are compared with the predefined thresholds of the process window and the evaluation is reported back to the system.
An adjustment of the parameters, such as laser power, for example, can therefore be carried out automatically. Data comparison over a longer period can also furnish an indication of maintenance work that may be needed on the laser or the optical components of the system. Documentation of the measurement results thus helps in planning work more effectively and reducing costs.