Arden Photonics has introduced the BQM-50 beam propagation analyser. Compact, easy to align and adjust, the company says it measures M² in less than 20 seconds, with a wavelength range of 400 to 1100nm.

The BQM-50 is designed to allow complete measurement of laser beam propagation characteristics. It applies patented NPL technology, which means it has no moving parts.

This means there is no need for a translation stage which is normally required to allow beam widths to be sampled as the camera moves through the laser caustic.

The clear, simple-to-use software gives complete control over the measurement, which can be controlled via USB2.0 interface from a laptop computer. This gives the whole system portability and convenience which means users can make M² measurements whenever and wherever they need to.