Active Headlamp with DMD Technology to generate complete Light Distribution

In this paper we present the prototype of an active headlamp that can generate high-resolution light distributions by using a micromirror array (DMD). A distortive projection optics is used to widen the aspect ratio according to a headlamp light distribution and to generate a central hotspot with high illuminance. As a result, the degree of utilization of the micromirror and thus the system efficiency compared to previous prototypes can be significantly increased, as shown by a typical high beam distribution. Based on the optical simulation, the advantages and disadvantages of the distortive optics are discussed and finally results of the photometric measurement of the prototype are presented.