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Product Announcement

Knight Optical’s UV Fused Silica for Vacuum Windows

12 Oct 2020

A relatively hard optical glass with a low coefficient of thermal expansion, UV Fused Silica Windows are an excellent choice for vacuum applications due to their ability to retain high optical performance when subjected to high-temperature environments.

 What's more, UV Fused Silica's high-performance benefits include high transmission from the ultraviolet (UV) to the near-infrared (NIR) spectrums, resulting in little loss of images and an uncompromised optical system when used for vacuum windows and viewports.

 Similar to N-BK7 (or equivalent) in performance, UV Fused Silica has a remarkably similar average transmission over the visible range, up to approximately 2000nm, and a slightly lower refractive index.  The Abbe constants of UV Fused Silica are also very similar to that of N-BK7 (or equivalent), although somewhat higher.

 Typical Specs:

Material: UV Grade Fused Silica

Operating Wavelength: 587nm

Diameter Tolerance: +0 /-0.10mm

Centring Tolerance:

Focal Length Tolerance: ± 0.2mm (<10mm), ±2.0% (10mm-1000mm)

Centre Thickness Tolerance: ±0.2mm

Surface Figure: 3/ 3 (1)

Surface Quality:  

Coating: Optional

 First-Class Quality

Quality is the driving force behind Knight Optical, and to ensure you profit from high-precision optics, we take the utmost care to ensure every component accurately meets your specifications. Offering unparalleled service, Knight Optical undertakes a full inspection of your optics from our ISO 9001:2015-certified, state-of-the-art Metrology Laboratory, followed by a meticulous visual examination by our dedicated QA department.

To discover how we can enhance your supply chain experience and to learn more about our custom-made UV Fused Silica Lenses, contact a member of our technical sales team today. 

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 

Knight Optical Ltd
Roebuck Business Park
ME17 1AB
United Kingdom
Tel: 44 (0)1622 859444
Fax: 44 (0)1622 859 555
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