GRANTECAN telescope M3 mirror manufacturing

LZOS manufactured the flat surface of the M3 mirror for the GRANTECAN Project. The mirror has an elliptical configuration and axial dimensions of 1521 mm x 1073 mm. The results of the M3 mirror figuring and final polishing, testing in the Ritchey-Common layout at two 30° and 60° angles of incidence of a main beam are presented in the manuscript.