Ball Lenses & Half Ball Lenses for Fiber Lasers

Spherical lenses High Refractive Index Glass such as Sapphire & LASFN-9 Glass


Knight Optical offer a range of Stock Ball Lenses and Half Ball Lenses, for use within Fibre Lasers. As the name suggests ball lenses are completely spherical lenses mostly made out of High Refractive Index Glass such as Sapphire, and LASFN-9 Glass. The reason ball lenses are most commonly used is for their ability to focus light when leaving a fibre optic, so that it can therefore be used for a laser application. The key feature of ball lenses is their short back focal length allowing for precision coupling where size or space is a limiting factor in the system. Ball lenses are typically used in pairs with one lens acting as a collimator for the second to focus the light back into the coupled fibre. Where a more compact solution is required a half-ball lens is typically more suitable. We hold a large inventory of Ball Lenses. •Stock sizes from 0.5 5mm to 10mm diameter. •Custom sizes available to quotation. •Half Ball lenses also available.

Lasers - medical applications
  • Ball Lenses & Half Ball Lenses
  • Optical Fiber lasers
  • High Refractive Index Glass optics

Product features

Material: BK7 or equivalent, Sapphire, Ruby, Quartz
Diameter Tolerance: +/-2.5µm
Figure (sphericity):
Focal Length Tolerance: ± 0.2% (<10mm)
Wavelength Range: 0.17 – 5.5µm
Surface quality: <40-20 Scratch/Dig

Additional product literature


Knight Optical's Business video introduction

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