BeamMonitor BM-HQ

Raw beam diagnostics of Co2 lasers and ideal for intergration into material processing system and for use in servicing   

The BeamMonitor BM-HQ replaces the typical plexiglass burns used to identify the beam profile or beam symmetry. The diagnostic device enables quick measurement with high precision. This is guaranteed by a detector with a high dynamic range.  The mechanical scanning system measures the power density of collimated laser beams at full power. The BM-HQ has been used successfully for a number of years and it is the perfect device for analysing your laser beam.

Due to its compact design and light weight, the BeamMonitor BM-HQ is ideal for integration into material processing systems and for use in servicing.

Typical areas of application are:   

  • Laser and system development 
  • Quality assurance in production of laser sources 
  • Simplifies service and maintenance 

Determine Wear and Deviations   

The geometric data, beam symmetry and power density distribution can indicate the optical quality. Its absorption and dirt contamination level as well as alignment problems, should checked regularly.

Change of optics is often due to the unavoidable pollution of the surfaces of the optical components or inadequate cooling. Especially in the case of transmission components such as output coupling windows or beam splitters. The dirt contamination results in higher absorption and thus creates thermal lensing. This influences beam diameter and beam divergence.

With the BM-HQ, the user is able to measure beam parameters quickly and reliably.

The Principle   

The laser beam is scanned point by point with a rotating measuring tip. The mirror mount is also moved in a linear fashion to scan the entire beam profile. In this way, a partial beam is diverted and directed at the detector in each instance.

The incoming signal is digitised and transmitted to the evaluation unit. The 14-bit A/D converter and resolution of up to 256 x 128 pixels employed enable an exact analysis even of small disturbances in the raw beam. The device was designed for use in harsh industrial manufacturing conditions, and is adaptable in every spatial orientation.

The software has the following standard functions:

  • Measurements: single measurments, series measuremtns (monitor operation), and measurment of chronological development (linescan)
  • Displays: isometry, fales colors, contour lines and display of numeric results
  • Data saved in *.foc or ASCll file format

During the measurment, the entire beam exites the BeamMonitor and must be absored as completely as possible.

Measured beam parameters   

  • Beam position   
  • Beam dimension   
  • Beam summerty   
  • Power density distribution 

The device is operated from a PC. This enables the entire power density distribution to be represented within a few seconds. With an Ethernet connection, a maximum repeat frequency of 0.4 Hz is possible.

With the line scan function that is optionally available, the BM-HQ works at a repetition rate of around 30 Hz.

Subject to change without notice.