The prototype is made by a concave sphere primary and a plane secondary deposited the mo / si multilayer on the fused quartz substrates . the reflectivity peak and the reflectivity uniformity of the multilayer mirrors are respectively 25 % and around + 2 . 5 % at 17 . 1nm 望远镜主镜为球面，次镜为平面，所用反射镜为在熔石英基底上镀制mo si多层膜的euv波段反射镜，在17 . 1nm的反射率25 ，反射率的均匀性2 . 5 。
