SCANLAB, TU Dresden develops a polygonal scanner within the framework of the LAMpAS project | Business | October 2022

PUCHHEIM, Germany, October 17, 2022 — Collaborators from SCANLAB and Technische Universität Dresden (TU Dresden) have announced their design of a high-speed polygon scanner that produces periodic surface patterns using the interference principle. The device was realized as part of the EU-funded LAMpAS (High-Throughput Laser Patterning with Multiscale Periodic Feature Sizes for Advanced Surface Functionality) project.

According to the collaborators, the device allows users to produce patterns with feature sizes of around 3.5 µm, which is around 8 times smaller than what can be achieved with conventional polygon scanners operating at d infrared wave.

“To produce patterns with short spatial distances, large intercept angles are needed, which are impossible to achieve with conventional polygon scanners,” said Ronny De Loor, system architect at SCANLAB. “In addition, longer laser wavelengths require even greater angles compared to UV radiation. Therefore, we had to develop a very special optical arrangement in order to achieve the necessary angles.

The newly developed polygon scanner system implements Direct Laser Interference Modeling (DLIP) technology, which through the combination of multiple laser beams allows users to manipulate and control the intensity distribution of laser energy with resolution down to the submicron range. The combination of two laser beams produced a line-shaped intensity distribution, where the lateral distance between the lines could be controlled by the intercept angles between the beams.

The DLIP-polygon head will now be paired with a high-power laser previously developed by a team operating under the LAMpAS project, as high-throughput manufacturing also requires high laser powers.

In December 2021, collaborators of the LAMpAS project reported having reached the target parameters of an ultrafast kilowatt-class laser. TRUMPF developed the pulsed laser, which in tests exceeded 1.5 kW of average optical power. In February, LAMpAS said its collaborators had developed a high-speed infrared camera specially adapted to monitor the heat buildup of laser surface patterning processes. New infrared technologies have developed the camera. In October 2021, LAMpAS shared the development of a prototype online monitoring system for laser surface patterning by researchers at TU Dresden.

The final system will be assembled in Belgium by LASEA, a manufacturer of precision laser machines. The system further includes two monitoring systems with independent techniques to ensure the stability of the structuring process as well as the quality of the surface properties obtained.

LAMpAS was established in 2019 with a grant of €5.1 million (~$4.96 million) under the EU’s Horizon 2020 program. The aim of the project is to develop the potential of laser patterning and bring the technology to industrial levels at affordable costs. It aims at the design of newly functionalized surfaces by improving process efficiency, flexibility and productivity based on the development of a high power ultrashort pulse laser system as well as advanced optical concepts for high throughput material processing. . LAMpAS technology aims to produce well-defined periodic surface patterns with feature sizes below 1 µm that can provide customized surface functions for applications such as anti-fingerprint, decorative and easy-to-clean finishes for devices. appliances.

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