Non-Contact Beam Measurement


Beam Watch Ophir Spiricon

New version of “BeamWatch”, a non-contact beam monitoring system that features 3D views of laser beam caustic and ellipticity for a quick and realistic initial display. The system charts all beam measurements over time. This allows users to individually or automatically trace waist width and location during setup to more easily determine when the beam is aligned and in focus. The time charts feature is also useful for high power laser users who can now monitor how beam characteristics change as the laser is used over long periods of time.

Unlike conventional measurement systems that place a probe in the beam, causing potential damage and slowing the measurement process by several minutes, “BeamWatch” measures the Rayleigh scatter of the beam, so there is no contact and results are delivered in less than a second. This means no power restrictions; the system has already been successfully used on high power lasers up to 100 kW.

The system is able to dynamically measure beams with spot sizes down to 55 μm. This allows instant readings and, therefore, rapid correction of large area cosine changes. This means smaller, higher accuracy welds and cuts, and reduced variability across parts. The system takes measurements every 60 ms, providing instant readings of focus spot size and beam position, as well as dynamic measurements of focal plane location during process start-up. The lightweight, compact system monitors high power YAG, fiber, and diode lasers in the range from 980 to 1080 nm. It measures key beam size, position, and quality parameters, including focus spot size, waist width, and beam propagation parameter (M2).

Ophir Spiricon Europe GmbH
Guerickeweg 7
64291 Darmstadt, Germany
Phone: +49 (0)6151 708-0
Fax: +49 (0)6151 708-599