Ball lens Spherical ball lenses are widely used in optical measurement systems, projection & imaging optical systems. Also for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, and fiber-to-detector coupling. We provide all kinds of ball lens such as ZnS ball lens, fused silica ball lens, MgF2 ball lens and so on. Capacity: Material: Optical glass, Fused silica, Silicon, Germanium, CaF2, MgF2, Sapphire, ZnSe, ZnS Diameter: 0.2 to 500mm Diameter Tolerance: +0/-0.02 mm Sphericity:0.001mm Surface Quality: 10-5 Specification: MaterialBK7 grade A, B270, UV grade Fused Silica, Sapphire etc. Diameter Tolerance0.05mm (Standard), up to +0.000/-0.002mm Sphericity0.005mm (Standard), up t o +/-0.6um Surface Quality60-40 S/D (Standard), up to 20-10 S/D Coatinguncoated