High Efficiency Headlamp Systems with Variable Focus

The built-in space available for a headlamp in motor vehicles has been steadily reduced by vehicle manufacturers over the last few years.

In order to continue to provide the driver with the necessary safety equipment, new headlamp designs with improved efficiency are necessary. One such new design, the reflector with variable focus (VF Reflector), is presented in this paper.

The mathematical concept of VF reflectors is explained and the advantages in lighting technique over conventional reflector systems are illustrated by means of concrete examples.