Cut above the rest

摘要

Forget the Star Wars image, lasers are increasingly to be found in machine tools. And a combination of technical advances and lower prices should make them even more popular over the next few years. There are two main types of lasers: CO_2, and neodymium yttrium aluminium garnet, or YAG. CO_2 lasers tend to be used for cutting and the less powerful, but more accurate, YAG lasers are Used for marking.