提出了一种基于方位角调制的LED道路照明灯具的配光设计方法。选择型号为OSLON SX的大功率LED作为光源，利用16颗LED建立了4×4阵列LED灯具的光学模型。通过改变每一排LED的方位角控制了接收面上的光照度分布。研究表明，当LED阵列上下部分分别倾斜±30°时，接收面的光照度最均匀。

An optical distribution design method based on azimuth modulation is put forward. Model OSLON SX high power Light Emitted Diodes (LED) are chosen as a light source. An optical model of a 4×4 LED array is built with 16 LEDs. The illumination distribution on the receiving surface is controlled by changing the azimuth of each row of LEDs. The research result show that the illumination distribution on the receiving surface is most uniform when the upper and lower portions of the LED array tilt at an angle of ±30° respectively.