1.Dia tolerance:+/-0.01mm 2.Angle tolerance:5''-3' 3.Materical:Bk7,K9.Si,Ge,Caf2,sapphire,Znse,GaAs,Zns 4.Parallelism:5arcmin Optical Windows We are fully committed to designing and making all kinds of optical components for customer special use MaterialBK7 etc optical glass to IR CaF2,MgF2,Ge,ZnSe,Mono Si,ZnS,quartz, Sapphire,etc crystal materials. SizeΦ2 –Φ120mmDimension tolerance± 0.1mmSurface ...