BEAM DELIVERY


for acceleration, and strong brakes for deceleration, and all of these elements must be precise. Likewise, every aspect of the laser scanner’s properties, from the spindle and mirrors, to the high-precision position detecting system, needs to be handled correctly if the throughput is to be good enough to fulfil the user’s needs. Raylase, with headquarters in Wessling,


Germany, understands this critical need for precision. Te company develops deflection units, which comprise a galvo, mirrors, controlling unit and important electronic components, and these units are used to bring


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the laser spot directly to where users need it to be. Raylase products can work with a spot size of


around 60µm in a field of 1 x 1m, and at a speed of more than 10m/s. According to Dr Philipp Schön, CSO at Raylase, other technologies, such as micro-electro-mechanical systems (MEMS), have some benefits, but today they cannot reach the required standard for beam power and precision. Te company is looking at this technology, but believes that scanning heads – which enable the laser’s power to be focused and harnessed down to very specific points – will continue to be one of the most important


elements for many applications, for at least the next 10 to 20 years. In terms of the most promising scanning


technology, Scanlab’s Hofner added: ‘We must first decide exactly which scanning technologies to consider in detail. Do we differentiate among galvo-based systems, polygon scanners and piezo-electronic or acoustic-electronic systems? We still see galvo-driven systems as the most promising and suitable solution because of their speed, precision and ability to handle high laser powers. However, other hybrid systems will sometimes gain importance, such as the hybrid polygon scanner we developed for USP lasers.’


ISSUE 29 • WINTER 2015 LASER SYSTEMS EUROPE 27


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