Palacký University is a partner of 7th Framework program entitled "Closed Loop Control of the Laser Welding Process through the Measurement of Plasma (no. 222279)" - CLET. Researchers and small/middle enterprises cooperate here on sensor development to control laser weld quality using spectroscopy methods. It makes possible an on-line optimization of process parameters avoiding formation of material defects. and Hana Chmelíčková, Hana Lapšanská.