A method and apparatus for carrying out a laser operation, wherein a laser source is provided, wherein lasing gas is supplied from at least one lasing gas source to the laser source for the formation of a laser beam, wherein, with the aid of the laser beam, an operation is carried out, such as for instance...http://www.google.ca/patents/US7873093?utm_source=gb-gplus-sharePatent US7873093 - Method and apparatus for carrying out a laser operation and use of a quick-change filter in such a laser operation
