Very high power is needed to cut or weld using a laser beam.
But this creates its own problem: the beam’s energy deforms the mirrors that
are focusing it to a point. When this happens, the beam expands and loses
intensity. A new type of mirror can deform itself so as to correct this
unwanted deformation. It will be presented at the Optatec trade fair in
Frankfurt from May 20 to 22 (hall 3, booth D50).