Laser processing is an effective way for precisely and accurately removing a small region of materials without tool wear. Conventional laser processing, which has a limitation on the processing speed, is performed by scanning a single spot on a target material. For improving its speed, a high-power laser beam can be spatially distributed using a hologram to simultaneously process a two-dimensional area. This technique has been used in experiments such as drilling, patterning, etc. However, as far as we know, due to several difficulties, no experiments have been reported that apply the holographic technique to non-scanning cutting with a single hologram. In this research, we experimentally performed non-scanning 2-D laser cutting of a polyimide film by using a single computer-generated hologram (CGH) and a high-power laser of 120 W. To do this, we designed a CGH to reconstruct twelve lines in a 24 mm × 23 mm area. This was then fabricated with fused silica so that it would not be damaged by the high-power laser. This method makes possible the achievement of a high throughput in a material cutting process by utilizing a high-power laser efficiently.

中文翻译：

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使用计算机生成的全息图对聚酰亚胺进行非扫描二维激光切割

激光加工是一种在不磨损刀具的情况下精确去除小区域材料的有效方法。传统的激光加工对加工速度有限制，它是通过扫描目标材料上的单个光点来进行的。为了提高其速度，可以使用全息图在空间上分布高功率激光束，以同时处理二维区域。这种技术已经用于钻孔、图案化等实验。但是，据我们所知，由于一些困难，还没有将全息技术应用于具有单个全息图的非扫描切割的实验报道。在这项研究中，我们通过使用单个计算机生成全息图 (CGH) 和 120 W 的高功率激光器，通过实验对聚酰亚胺薄膜进行了非扫描二维激光切割。为此，我们设计了一个 CGH 来在 24 mm × 23 mm 的区域内重建 12 条线。然后用熔融石英制造它，这样它就不会被高功率激光损坏。这种方法可以通过有效地利用高功率激光在材料切割过程中实现高产量。