中文说明：激光光学里的光束通过透镜后光斑，及其能量分布
English Description：
In laser optics, the light spot and its energy distribution after passing through a lens
In laser optics, the spot of light passing through a lens
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中文说明：激光光学里的光束通过透镜后光斑，及其能量分布
English Description：
In laser optics, the light spot and its energy distribution after passing through a lens