Alternatively holographic mask or an array of micro lenses may be used to focus the laser beams to the vias to fill them with metal.
另外全息面具或者微透镜阵列，可用于集中的激光束的孔，以填补他们的金属。
The orthogonal surface equation of the collimating micro-lenses array is derived, the divergence angles after collimating and the parameters of the focused lens are calculated.
推导出了正交的两组准直微透镜阵列的面形公式；计算了准直光束的准直精度和聚焦光学系统参数。
The orthogonal surface equation of the collimating micro-lenses array is derived, the divergence angles after collimating and the parameters of the focused lens are calculated.
推导出了正交的两组准直微透镜阵列的面形公式；计算了准直光束的准直精度和聚焦光学系统参数。
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