一种面向LED扩展光源的道路配光设计

在多车道的道路照明中,需要非对称矩形配光。本文根据非成像光学理论,建立点光源空间与目标照明面之间的拓扑关系,采用合适的反馈优化方法,获得面向扩展光源且在路面上形成均匀非对称矩形光斑的反射器,仿真结果表明,配光后光源的能量基本上被限制在20m×12m的矩形区域内,且实现了非对称的配光,横向照度均匀度达到了85%,纵向照度均匀度达到了80%,满足道路照明要求;并且通过开模实际测试出整体的照度均匀度为80.13%,验证仿真结果以及证明了设计方案的可行性和反射器在路灯灯具中的实用性。

Optical design for uniform illumination with LED extended source in road lighting application

Light distribution requirements are very high with wide applications o f LED in the field of road lighting.The asymmetrical rectangular light distribution is needed in the multi -lane road lighting.According to non-imaging optical principle,we establish the corresponding relationship betw een the point source and road. Then the reflector with the uniform asymmetrical rectangular intensity distribut ion on the road for extended source is obtained by using the appropriate feedback optimization.Simulation results sh ow that the light energy is limited in the rectangular area of 20m×12m.The horizontal illumination u niformity and vertical illumination uniformity can reach 85% and 80%,respectively.It can meets the requirements in r oad lighting application.And the overall uniformity of illuminance is 80.13% by the actual test.This can prove th e feasibility and practicality of the reflector design in road lighting.