Automated mirror design using an evolution strategy

We describe how an evolution strategy is used to automate the design of lum inaire reflectors, in particular, we outline a computer simulation, consist ing of a 2-D optical reflector with point light source, which is implemente d for this purpose. The reflector shape is modeled using a Bezier curve rep resentation, and photometric distributions are calculated in the near, midd le and far fields using a ray-tracing approach. The automation of the desig n process is achieved through the use of a novel evolution strategy, termed differential evolution. For the effective operation of differential evolut ion, a merit function specific to luminaire reflector design is presented. Finally, we describe our investigation into the validity of the evolution s trategy approach to reflector design. Based on our results, we propose that the technique is not only valid but also feasible. (C) 1999 Society of Pho to-Optical Instrumentation Engineers. [S0091-3286(99)01602-5].