| 摘要 |
<p>Apparatus and a method for drilling precision holes in a variety of materials. The apparatus uses a ruby laser to produce a train of light pulses which are focussed by optics onto a workpiece. Each of the pulse in the train can be controlled in peak energy, duration and shape independently from the other pulses in the train and the spot size and shape of each pulse at the workpiece can also be independently controlled. In accordance with the method, a computer operates the laser to drill a small pilot hole in the workpiece using a group of varying pulses. The pilot hole is then widened and reamed with the laser to the final size. On multilayer workpieces, multiple pulses with different pulse width, energy and spatial shape are used at each stage of the hole to prevent workpiece damage, yet allow drilling at reasonable speeds.</p> |
