Specification :

Spherical Ball Lenses are commonly used for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, and fiber-to-detector coupling. Larger spheres are easier to handle and ease the sensitivity of translational alignment. However, smaller spheres has the benefit of fitting into smaller packages.
Material BK7,fused silica,Sapphire or custom materials
Surface Quality 85%
Diameter Minimum 1mm
Diameter Tolerance +/-0.005mm
Surface Quality 60/40 Scratch/Dig