daily coverage of the optics & photonics industry and the markets that it serves
Featured Showcases
Optics+Photonics Showcase
Press Releases
Press Release

Knight Optical's Introduce new range of Stock and Custom IR Sapphire Spherical Lenses

Date Announced: 31 Aug 2017

Sapphire crystal (Al2O3) is an excellent substrate for a range of rugged applications.

It has high transmission from 150nm up to around 5µm therefore ideal for UV, Visible and IR applications. Sapphire lenses have excellent mechanical strength and hardness. With sapphire having superb thermal and chemical resistance and being scratch resistant, sapphire is a perfect choice for lens applications. Sapphire is inert and resistant to attack from most processing environments, such as hydrofluoric acid.

We supply a range of sapphire lens solutions and offer plano convex, biconvex and concave sapphire lens solutions. Our sapphire lenses can also be antireflective coated to increase efficiency in UV and IR applications. Sapphire grades we offer are Random, C-Cut, Z-Cut and fluorescence free sapphire.

Sapphire lenses can be found on probes that burrow deep under the earth’s surface and on aerospace and aeronautical vehicles where they are subject to impact by high speed debris. The scratch resistance of sapphire ensures a long life of durability for optical components.

Sapphire has a melting point over 2000°C with a high thermal conductivity makes it suitable for use in extremely hot environments such as furnaces, and high power laser applications, such as Er:YAG lasers.

Sapphire lenses are rare in the field of optical components, as most manufacturers only supply custom orders due to the high cost of sapphire. Knight Optical offers a range of stock sapphire lenses for your applications, and can also supply custom solutions to your individual specification. Every component is individually tested by our highly skilled technicians in our state of the art metrology lab to ensure your requirements are met.

Material: Sapphire (Random grade)

Diameter: +0 / -0.10mm

Centring accuracy: < 5 arc min

Focal length: ± 2.0%

Centre thickness: ± 0.25mm

Surface quality:

 Coating options: Extended broadband multilayer antireflective coating <0.5%@450-900nm

All our Sapphire Spherical Lenses are fully inspected on their quality in our ISO 9001 certified, state-of-the-art Metrology laboratory. 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 Germanium Windows 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

Sapphire PDF


IR material Sapphire_C-cut_UV
IR material Sapphire C-cut UV
IR material sapphire random


USA and Canada

Knight Optical (USA) LLC
1130 Ten Rod Road
Suite D102
North Kingstown
Rhode Island 02852
Telephone: (001)401-583-7846
Fax: (001) 401-583-7851

Europe, UK, Asia and RoW

Knight Optical (UK) Ltd
Roebuck Business Park
Kent, ME17 1AB
Telephone: +44 (0)1622 859444
Fax: +44 (0)1622 859555

E-mail: mike.sharpe@knightoptical.com

Web Site: www.knightoptical.com

© 2023 SPIE Europe
Top of Page