A light guide plate with non-uniform arrangement was designed using an optical software LightTools. When the plate was in the automobile headlamp lens, it reduced the exit light divergence angle and increased the utilization rate of light energy, resulted in more uniform luminance distribution. This device could avoid the influence of external light on the driver in the night.%通过LightTools光学软件设计出了微结构非均匀排布的圆形导光板，将其作为汽车前照灯的配光镜使用时，不但有效地减少了出射光线的发散角，使能量分布更加集中，而且提高了光照度，增大了光能利用率，同时使光照度在中间区域内分布更加均匀，从而减少了汽车夜间行驶时灯光对驾驶员的影响。
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