8mm half ball lenses optical bk7 fused silica quartz JGS1

Optical ball lens, half ball lenses Material: glass such as sapphie,k9,bk7,SF5,SF6,B270,fused silica,znse,caf2,ge,etc. Diameter:8mm Surface quality:20-10 Flatness;1/4 lambda Tolerance;+/-0.002mm Changchun Sunday Optoelectronics Co.,ltd