Dynamic optical systems (e.g. automotive headlights) provide the changes of their optical parameters, on the one hand by the motion of the whole lighting unite or on the other hand by the rigid motion of the individual elements of the optical system [
Our principle of reflector area controlled deformation is a new point of view in a required light beam modification of headlights during the car drive.
It is necessary to solve coupled light-mechanical task to examine the influence of reflector area deformation on the quality of beam pattern by numerical methods. Light-mechanical task of weak coupled field is solved by the sequential method. In the first process step the deformation analyses of the reflector is made by the FEM method [
], following by the light analyses. In the second step the beam pattern of the optical system is under evaluation. Searching algorithm has been developed for the lighting field solving on the base of the backward ray tracing algorithm, which analyzes optical system and seeks out optical system elements orienting light rays into the examining parts of the illuminated half-space.
Light performance of optical system is qualified as the beam pattern on the plane in the specific distance out of optical midpoint that represents detector. For the coupling between active optical system elements and detector nodes, the finite elements of light beam have been developed as well as the alternative direct computation. For the documentation of above-mentioned process we solved a bilinear optical system consist of a light source, a reflector and a detector. The response of the optical system has been sought (the curve of the illuminance spreading on the detector) on the controlled deformation of the reflector curve. The numerical simulation outcomes has been verified with the experiment measurements of the optical parameters of recall optical system.