Diploma and Master Theses (authored and supervised):
"Simulation des Bildaufbaus in einem Laserprojektionssystem für die automobile Frontbeleuchtung";
Supervisor: F. Breitenecker;
Institut für Analysis und Scientific Computing,
final examination: 2013-10-17.
The latest technology in the field of automotive front lighting systems are adaptive vehicular headlamp systems, which adjust their light distribution to the current traffic situation.
They are always driven with high beam, the oncoming traffic meanwhile is blinded out. In addition, potentially dangerous objects can be directly illuminated. Using modern laser light sources and MEMS micro-scanners allows developing efficient and compact systems, which
significantly improve the road safety at night.
The company ZKW - ZIZALA light systems GmbH is developing a concept for a laser-based projection system, which will be used as additional high beam in a vehicular headlight. In this case a focused laser beam, which is deflected by a micro-mirror, scans a fluorescent
ceramic layer ("phosphor" or "converter"). The laser beam locally excites the phosphor to glow. Therefore, different light distributions can be generated.
This thesis deals with the development of the image on the phosphor-coated surface, in which two different laser-based projection systems are considered. First a 2D laser-based projection system is analysed, in which the micro-mirror oscillates resonant in two spatial directions.
Due to the fact that the mirror oscillates, Lissajous-figures are generated on the phosphor.
In this case, some effects must be considered as far as the modelling is concerned, such as differences in brightness, diverse diameter of the laserspot or the phosphorescence of the converter. Furthermore, the intensity values to dim the laser are calculated for generating
specific light distribution. Then these are tested on a prototype. The simulation results are in conformity with the predetermined light distributions. As far as the second system is concerned, namely the 1D multi-laser projection system, the micro-scanner oscillates in one
direction only, but here a total of six laser diodes is used. Each of them writes one line on the phosphor. Some influencing factors, like the parabolic lines and their intersections, have to be considered as well. Here, the results are also feasible.
Created from the Publication Database of the Vienna University of Technology.