The concept of redundant illumination is introduced to ensure the coherent illumination of zone plate and reduce the effect of source instability and element vibration.

引入冗余照明的概念，以实现波带板的空间相干照明以及降低束线对光源不稳定性及元件振动的要求。

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In the classroom where there is no gable, the sunlight-plate will borrow light from the classroom next door. This guarantees a good illumination in all the classrooms.

在没有山墙的教室，则通过阳光板像隔壁教室借光，这样保证所有教室的照度。

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The experimental results show that the method has strong adaptability to unconstrained illumination conditions and irregular background, and is efficient in locating license plate.

实验结果表明，该方法在各种光照和复杂背景条件下均有很好的适应性，对牌照定位有很高的准确性。

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