Knight Optical


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Ball and Half Ball Lenses for Microscopes

Knight Optical can offer you Stock and Custom Ball Lenses, for use within Microscope Applications in a range of materials such as Sapphire, Ruby, Quartz and BK7 or equivalent.

Our uncoated Precision Ball Lenses can be achieve a very high level of yield of magnification and are widely used for focusing and coupling light into and out of Microscopes. We can offer these in Sapphire, made from Al2O3, and BK7 or equivalent material. Sapphire allows for superior optical transmission qualities.

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 and therefore ideal in the use of Microscopes or microscopic attachments onto devices such as mobile phones.

Ball Lenses are manufactured from a single substrate of glad and therefore, depending on the geometry of the input source, can focus or collimate light. Half Ball Lenses can also be used as an interchange with a full ball lens for more compact designs.

In addition to our stock Ball and Half Bull Lenses, we can offer a full range of custom lenses in a variety of materials such as ceramic, UV and NIR materials at custom sizes and focal lengths to suit your application.

Typical specs:

Material: BK7 or equivalent, Sapphire, Ruby, Quartz
Diameter Tolerance: ±2.5
Figure (sphericity):
Focal Length (@587mm): ± 0.2% (<10mm), ±2.0% (10-1000mm), ±5.0% (>1000mm)
Surface Quality: <40-20 Scratch/Dig
Back Focal Length (mm): 0.05 up to 2.34 for stock parts
Focal Length (mm): 0.345 up to 7.34 for stock parts

All our Ball Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory, using our Trioptics Optispheric 2000AF equipped for precise EFL and BFL measurements, and Starrett AV300 video microscope for high accurate diameter testing. 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 Tel 44 (0)1622 859444
USA & Canada: E-Mail Tel 001 401-583-7846

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