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Divergence Measurement

DataRay's products provide multiple ways of measuring beam divergence:

  • Far Field (greater than four Rayleigh ranges from the source) – Use a BeamMap2 (with appropriate plane spacing) in divergence mode to measure divergence directly in real-time for beam divergences between 1 & 350 mrad (0.02° to 20°). Good for CW and very high rep rate pulsed lasers.
  • Far Field (less than four Rayleigh ranges from the source) – Use a single plane Beam Profiling Camera or Scanning Slit Beam Profiler to measure beam diameter at a known distance Z from the source.
  • Near Field – Use a BeamMap2 in M² mode with the beam waist close to the zero plane.
  • Near and Far Fields – See Gaussian Beam Divergence Measurement application note and its associated Excel spreadsheet. Use with an ancillary lens and appropriate Beam Profiling Camera or Scanning Slit Beam Profiler.

Also refer to M² Analysis, as this requires the simultaneous measurement of divergence and beamwaist diameter.

If you are unsure as to which is most suitable for your application, please contact us or use our Product Selector.

Application WinCamD series BladeCam series TaperCamD series Beam'R series BeamMap series BeamScope series
Divergence Measurement*


model-dependent or requires accessories

* at known Z