Lens Design of Street Lamp for Integrated High Power LED

摘要

The paper studies the photometric patch design way of aspherical lens to solve the difficulty of photometric design for integrated high power LED street lamp, which has the demand of prescribed rectangular illumination. It divides lens surface into several corresponding patches according to the subarea of road surface, and controls luminous beam to appointed area in order to adjusting radiation shape through controlling parameters of lens surface. Based on the optics simulation software LightTools the paper takes maximum luminance, average luminance and length of rectangular illumination as optimal objects, and optimizes the parameters of photometric patch design optimal model for aspherical lens of integrated high power LED street lamp using orthogonal experimental method. And the optimal result is good and satisfies the relational national standards about street and road luminance. The paper validates rationality of photometric patch design method and validity of the lens through experiment. The study puts forward an effective design way for strict photometric demand about LED street lamp.