LASYS: LASERS IN ACTION 12.00-12.30


Improvement of SLM technology using beam shaping and athermalised optics


Dr Alexander Laskin, AdlOptica


thereby giving significant cost advantages. Te robust and compact laser modules are easily integrated into industrial production processes. As a new feature, individual emission zones of


the VCSEL source are controlled independently by the electronic driver system, thereby enabling adjustment of the spatial heating profile. Heating patterns can even be changed dynamically during operation, enabling an unprecedented level of process flexibility. www.philips.com/photonics


11.30-12.00


The right laser source, depending on application demands


Peter Kallage, Rofin-Sinar Laser


Systems for industrial laser applications like cutting, welding and surface processing are well established, reliable and cost efficient production tools. Tey have clear technical advantages thanks to their wear-free, highly localised material interaction.


Selective laser melting (SLM) is a thermal process, so controlling the thermal effects in an optical system and melting pool are of great importance, especially with powerful lasers increasing process productivity. Unwanted thermal effects with TEM00 lasers


result in gradient heating of optics and contaminated protective windows. Tis leads to focus shiſt, a non-uniform temperature profile in a focused spot, and subsequent irregularities in the melting process. One solution is to use a beam shaper from high


purity fused silica to create flat-top or doughnut focused spots, or athermalised protective windows to compensate geometrical and refractive thermal effects. Measurement results show the suggested approach is successful. www.adloptica.com


13.30-14.00


High-speed PCB cutting Christian Hahn, Innolas Photonics


Increasing the speed at which free-form cutting of printed circuit boards (PCBs) is carried out can be an extremely challenging task. While commonly used milling processes introduce vibration to sensitive devices, the use of CO2


lasers causes


charring and unwanted conductive residues on the PCB. Using 355nm UV lasers prevents charring, but


the low penetration depth at 355nm requires high laser pulse energies, resulting in low cutting speeds, expensive system pricing, and poor laser lifetime. A solution to this is to use high rep-rate, short pulse 532nm lasers. Using Innolas Photonics’ Blizz lasers enables up to 30mm/sec high speed PCB cutting, producing a high quality cut. www.innolas-photonics.com


Rofin offers not only the entire range of high power industrial laser sources such as fibre lasers, diode lasers and CO2


lasers, but also the


consultancy for application-related laser choice, as well as a partnership to end customers and system manufacturers. In the presentation, Kallage will show, using


examples, how to select the most suitable laser for specific applications in the automotive industry, taking into account the latest laser technology and application techniques. www.rofin.com


28 LASER SYSTEMS EUROPE ISSUE 31 • SUMMER 2016 14.00-14.30


Optimising components and surfaces with a diode laser – generating, cladding and hardening of products


Markus Rütering, Laserline


Te presentation will explain the different methods of generating (via additive manufacturing) and cladding products using diode lasers. Various samples will be shown and discussed. In the second part of the presentation, the principle of laser


Laser pulse durations reaching nanoseconds, picoseconds, femtoseconds and even attoseconds lead to a new realm of material processing. Common devices are already manufactured with the help of ultrashort pulse lasers. Trumpf’s R&D teams and global partners are


working in close partnership to develop the technologies of tomorrow. Te company’s consecutive development process converts new technologies into a fully reliable 24/7 product. www.trumpf-laser.com


15.00-15.30


Application of lasers in the tool and mould making industry


Professor Peter Hoffmann, Dr Roland Dierken, Erlas – Erlanger Lasertechnik


15.30-16.00


Laser welding with industrial robots: practical examples of technical and productivity challenges and solutions


Wouter Zweers, AWL-Techniek


AWL-Techniek is one of the market leaders in automated welding machines. AWL has


@lasersystemsmag | www.lasersystemseurope.com


hardening and its advantages compared to conventional methods will be explained and demonstrated with examples. In addition, Rütering will


update attendees about the latest developments in diode laser technology and explain why an increasing number of applications can be performed with these systems. Diode lasers are more efficient than CO2


therefore face a brilliant outlook in the market, underlined by several independent experts. www.laserline.de


14.30-15.00


Nanoseconds, picoseconds, femtoseconds and beyond: pushing the limits of laser micromachining


Jan Wieduwilt, Trumpf Laser- und Systemtechnik


, fibre and disk lasers, and


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