1. Joint Laboratory of Optics of Palacký University and Institute of Physics of the Czech Academy of Science, Faculty of Science , Palacký University in Olomouc , 17. listopadu 12 , Olomouc , Czech Republic
2. Department of Mathematics and Physics, Faculty of Electrical Engineering and Informatics , University Pardubice , Studentská 95 , Pardubice , Czech Republic
3. Hella Autotechnik Nova , Družstevní 338/16 , Mohelnice , Czech Republic