Sunday Optics is specialized in the processing of precision optical window,We have four-axis polishing machine, large-size ring polishing machine, two-axis machine to manufacture high precison windows for customers. Specifications Diameterï 1mm to 1000mm. Diameter Tol.+/-0.02mm Material Bk7 sapphire fused silica,ZnS2,CaF2,Si,Ge. Surface Quality10-5 standard Flatness 1/10 lambda Parallisa
