LED路灯的二次光学透镜设计

鉴于道路照明需求的多样性和复杂性,基于配光曲线映射原理,运用透射光学设计手段,借鉴传统路灯设计方法,针对单颗大功率白光LED,根据其特有的配光特性参数设计了一种新颖的二次光学透镜。该透镜实现了将LED的郎伯型配光转换为蝙蝠翼型配光,将圆形光斑转换为矩形光斑,同时可以达到很高的光输出效率和近似1∶2的长宽比。与同类设计相比,达到国家道路照明标准,同时降低了设计复杂度,可应用于LED路灯设计。

General design of secondary optical lens in LED lighting

In view of the diversity and difficulty of the demand of street lighting,based on the mapping principle of the polar candela distribution,used transmission optical design methods,learn from traditional street design method,contrary to single powerful white LED,in line with its specific luminous distribution parameters,a kind of secondary optical lens had been designed.Results show that it is possible to design a correspondence secondary optical lens if given the parameters of the LED source.The designed lens can covert the Lambert distribution of the LED to Bat wing distribution,on other word,change the round light spot to rectangle light spot.Also very high light output efficiency and nearly 1∶2 of the aspect ratio can be got simultaneously.Compared with the similar design,using the most advanced light source,this design have achieve the national standard as well as reducing design complexity.This method can be used to design LED street lighting.