Avoiding and removing mid-spatial frequency errors in asphere and free form fabric Project ID: EG15_019/0004798 Provider: Ministry of Industry and Trade of the Czech Republic Period: Sep 30, 2015 - Jun 23, 2020 Recipient -- coordinator: Polpur s.r.o. -- Bc. Ondřej Brustmann Co-recepient(s) / PI(s): Co-investigators from IPP M. Špína, V. Lédl, J. Beneš, O. Matoušek, D. Tomka, V. Pleskot