1. Fraunhofer Institute for Material and Beam Technology, Winterbergstraße 28, Dresden 01277, Germany
2. Technische Universität Dresden, Helmholtzstr. 7, 01069 Dresden, Germany
3. Kampf Telescope Optics GmbH, Alois-Gilg-Weg 7, 81373 Munich, Germany
4. European Space Research and Technology Centre—ESTEC, Noordwijk 2201, Netherlands
5. Luleå University of Technology, 971 87 Luleå, Sweden