... .Materical:Bk7,K9.Si,Ge,Caf2,sapphire,Znse,GaAs,Zns 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 ... –Φ120mmDimension tolerance± 0.1mmSurface quality10/5,20/10,40/20, 60/40,80/50Flatnessλ/4@ 632.8nm, λ/8@ 632.8nm,Parallelism5 ...