The general assumption in calculating static correction is that the near-surface ray-paths travel vertically, which does not conform with the actual travelling path of ray.

静校正计算时一般假设射线在近地表附近为垂直传播，这种假设往往与射线实际传播的路径不符。

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By calculating the path between the lens and the sensor, the precise direction of a light ray can be reconstructed.

通过计算镜头和传感器之间的路径，可以重建一个具有精确方向的光线。

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Any outgoing ray path must be coincident with that of the returning ray.

任何出发的射线与返回的射线路径完全相同。

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Ray stood clear of them all on the path for a moment and waved, then, spinning, leaned forward into the storm.

NEWYORKER: Wasps