Abstract
In many automotive lamp designs a paraboloidal reflector directs images of a light source (filament) toward a fluted lens which shifts and spreads these images to form a prescribed pattern. A design concept is described in which the reflector is divided into segments (facets) in such a manner that the reflector alone produces the pattern and lens fluting is eliminated. The optical prescription for these facets was generated with computer programs which simulate the light images from each facet and “builds-up” the desired light pattern. Although a fog lamp design is outlined wherein the reflector elements were simple circular cylinders, the computer aided optical design concept can be applied to head lamps, driving lamps and signal lamps.
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