Ball lens are excellent for fibre coupling as they have very low spherical aberration, so focus and collimate light accurately. sapphire ball lenses are extremely hard and durable. Ball lenses are used for focusing light into small fibres, and for use as emitters and detectors

Material: sapphire Fused silica bk7 glass
Diameter:1mm
Surface quality:10/5 scratch/dig
Flatness;1/2 lambda
Tolerance;+/-0.002mm

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