The mechanism of coherent stimulated light scattering and the characteristics of the surface ripple in the laser interaction with materials is described.

叙述了激光与材料相互作用过程中引起相干受激光散射的机制，以及形成材料表面波纹的特性。

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The interaction comes from when you touch the surface, which breaks the line of sight of the laser and is recognized as a touch just as if you might touch the trackpad on an Apple Macbook.

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