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 fit into smaller packages. Coupling efficiency is generally >90% due to the simplicity of these lenses.

Material: BK7 grade A optical glass
Diameter Tolerance:
Standard: Up to +0.0, -0.005mm
Centration: 3 arc minutes
Clear Aperture: >85% of diameter
Surface Figure: lambda/2
Surface Quality:60-40 scratch and dig