Knight Optical's Ball Lenses & Half Ball Lenses for Fibre Lasers

08 Oct 2017

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.

Typical specs:

Material: BK7 or equivalent, Sapphire, Ruby, Quartz

Diameter Tolerance: +/-2.5µm
Figure (sphericity): 1λ
Focal Length Tolerance: ± 0.2% (<10mm)

± 2.0% (10-1000mm)

± 5.0% (>1000mm)

Wavelength Range: 0.17 – 5.5µm
Surface Quality:

Options acialable:

Antireflective coating of stock lenses
Stock ball lenses can be edged down to produce a drum lens.
Mounting into cells.

All our Sapphire Ball Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Trioptics Optispheric, and Starrett AV300. This allows us to work to the highest QA standards and meet the tolerance specifications on these precision components.

Contact our technical sales team to discover how Knight Optical’s high quality Ball Lenses and superior service can improve your instrumentation and supply chain experience.

UK, Europe, Asia & RoW: E-Mail info@knightoptical.co.uk Tel +44 (0)1622 859444

USA & Canada: E-Mail usasales@knightoptical.com Tel +001 401-583-7846