1. Institute of Electrical Engineering of the Slovak Academy of Sciences, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
2. International Laser Centrum, Ilkovičova 3, 841 04 Bratislava, Slovakia
3. Institute of Automotive Mechatronics, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovičova 3, 812 19 Bratislava, Slovakia
4. Vorarlberg University of Applied Sciences, Dornbirn, Vorarlberg A-6850, Austria